JP2011222470A - Light emission control device, illuminating device and diffusion device with illumination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose illumination control technology that gives comfortable feeling to humans.SOLUTION: An aroma pot is equipped with a light-emitting part made of three-color LED, and the color and luminance of emitted light are made to change on the basis of a function of time f(t). The function f(t) is a summing operation with weights of multiple formulas of sine waves with different frequencies. After setting a first standard color and a second standard color that are different from each other, the light-emitting part is configured to emit light of the first standard color when a value of the function f(t) equals the maximum value (the largest of values that the function f(t) can take), to emit light of the second standard color when a value of the function f(t) equals the minimum value, and to change the color of emitted light gradually from the first standard color to the second standard color as the value of the function f(t) changes from the maximum value to the minimum value.

Description

  The present invention relates to a light emission control device for controlling the state of light emission available for illumination, and also relates to a lighting device and a diffuser with illumination.

  A general lighting device keeps lighting at a constant brightness once activated, but the control to keep the brightness constant gives an artificial image to humans and is not necessarily comfortable for humans living in harmony with nature. It cannot be said that it is control. On the other hand, fluctuations (so-called 1 / f fluctuations, etc.) exist in all physical phenomena and biological phenomena in nature, and such fluctuations are said to have a pleasant effect on humans. This is the case, for example, in the light and dark fluctuations of the candle flame. However, it is often difficult to use real candles for lighting in consideration of safety and convenience. In consideration of this, Patent Document 1 below proposes an electronic candle that simulates the brightness and darkness of a candle flame.

  In Patent Document 2 below, an illumination method is proposed in which the luminous intensity and the color of light are changed so as to be synchronized with the human respiratory cycle. In Patent Document 3 below, a method of changing the lighting state of a room by controlling the light intensity of a large number of lighting devices is proposed.

  On the other hand, it is known that colors have an effect of making humans have various sensibilities, and various studies have been made on the relationship between single colors and sensibilities. For example, it is said that orange has a sensitivity of “relaxation” and “warm” to humans, and blue has a sensitivity of “calm” and “cold” to humans. Therefore, for example, it is considered that changing the illumination color to orange is effective for relaxing a person, and setting the illumination color blue is effective for calming a person.

JP 2002-270013 A JP 2000-357591 A JP 2006-286428 A

  However, just as a lighting device that keeps lighting at a constant brightness gives an artificial image to a human being, it is considered that a lighting device that keeps lighting at a constant color gives an artificial image to a human being. A method of changing the color of light one after another at a constant cycle using a three-color LED (for example, the light color is changed from red → green → blue → red → green → blue → There is also a method of changing the color to red ...), but considering that appropriate fluctuations have a pleasant impact on humans, such changes are also extremely artificial and have a pleasant impact on humans. Is hard to say. It would be beneficial if humans could have a pleasant sensibility using multiple colors, and the development of such technology is desired. In addition, it cannot be said that the technique of each said patent document is enough as a technique which meets such a request.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a light emission control device, a lighting device, and a diffusing device with illumination that contribute to making a human feel comfortable.

  The light emission control device according to the present invention is a light emission control device that controls a light emitting unit having a variable emission color, and uses a function of time including an addition result of a plurality of sine wave expressions having different frequencies, and the time control A light emission control unit that changes a light emission color is provided.

  By changing the emission color using the above function, the emission color fluctuates moderately, so that it is possible to give a comfortable sensibility to a person under illumination of the light emitting unit.

  For example, the light emission control unit also changes the intensity of light from the light emitting unit over time using the function.

  As a result, the intensity of light from the light emitting unit also fluctuates moderately, so that it is expected to promote the effect of having a comfortable sensation for a person under illumination of the light emitting unit.

  Specifically, for example, the function includes a result of weighted addition of the plurality of sine wave expressions.

  Thereby, it becomes possible to give moderate fluctuation to the luminescent color.

More specifically, for example, the plurality of sine waves include first to fifth sine waves, and the function is expressed by the term (α ₁ x ₁ + α ₂ x ₂ + α ₃ x ₃ + α ₄ x ₄ + α ₅ x ₅ ) or a term proportional to the term, x _i is an expression of the i th sine wave, α _i is a predetermined weighting factor (i is an integer of 1 to 5), The frequencies of f _{1 to} f ₅ of the fifth sine wave are expressed in units of Hz.
0.75 ≦ f ₁ ≦ 0.85,
0.64 ≦ f ₂ ≦ 0.72,
0.41 ≦ f ₃ ≦ 0.55,
0.25 ≦ f ₄ ≦ 0.35, and
0.16 ≦ f ₅ ≦ 0.24 is satisfied,
The weighting factors α _{1 to} α ₅ are:
0.26 ≦ α ₁ ≦ 0.30,
0.24 ≦ α ₂ ≦ 0.28,
0.39 ≦ α ₃ ≦ 0.41,
0.23 ≦ α ₄ ≦ 0.27, and
0.25 ≦ α ₅ ≦ 0.29 is satisfied.

  This makes it possible to give the emission color moderate fluctuations such as the brightness fluctuation of the candle flame.

More specifically, for example, the frequencies f _{1 to} f ₅ are expressed in units of Hz: f ₁ = 0.80, f ₂ = 0.68, f ₃ = 0.48, f ₄ = 0.30, and f ₅ = 0.20 and the weighting coefficients α _{1 to} α ₅ are α ₁ = 0.28, α ₂ = 0.26, α ₃ = 0.39, α ₄ = 0.25 and α ₅ = 0. .27 is satisfied.

  This makes it possible to give the emission color moderate fluctuations such as the brightness fluctuation of the candle flame.

Alternatively, for example, the plurality of sine waves include first to fifth sine waves, and the function is a term (α ₁ x ₁ + α ₂ x ₂ + α ₃ x ₃ + α ₄ x ₄ + α ₅ x ₅ ) or Including a term proportional to the term, x _i is an expression of the i-th sine wave, α _i is a predetermined weighting factor (i is an integer of 1 to 5), and the first to fifth sine Wave frequencies f _{1 to} f ₅ are expressed in units of Hz.
0.75 ≦ f ₁ ≦ 0.85,
0.64 ≦ f ₂ ≦ 0.72,
0.41 ≦ f ₃ ≦ 0.55,
0.25 ≦ f ₄ ≦ 0.35, and
0.16 ≦ f ₅ ≦ 0.24 is satisfied,
Each of the weighting coefficients α ₄ and α ₅ is larger than each of the weighting coefficients α _{1 to} α ₃ .

  As a result, it is possible to give the emission color an appropriate fluctuation approximate to the luminance fluctuation of the candle flame.

More specifically, for example, the weighting coefficients α _{1 to} α ₅ satisfy α ₁ = α ₂ = α ₃ = 0.10 and α ₄ = α ₅ = 0.58.

  As a result, it is possible to give the emission color an appropriate fluctuation approximate to the luminance fluctuation of the candle flame.

  For example, the emission control unit may change the emission color so that the emission color includes green in the emission color change process, and the emission color may include red in the emission color change process. A plurality of modes including at least one of a second mode for changing the red color and a third mode for changing the emission color so that the emission color includes purple in the process of changing the emission color. Either one is selected according to the input mode selection signal, and the emission color is changed in the selection mode.

  As a result, it is possible to provide a comfortable sensation (for example, a sensation of relaxation, refreshment, or romantic) to a person under illumination of the light emitting unit.

  Alternatively, for example, the light emission control unit is configured to change a wavelength of the emission color within a range from 490 nm to 560 nm, a second mode to change the wavelength of the emission color within a range of 560 nm to 630 nm, and , Selecting any one of a plurality of modes including at least one of the third modes for changing the wavelength of the emission color within a range from 400 nm to 450 nm according to the input mode selection signal The emission color is changed in the mode.

  As a result, it is possible to provide a comfortable sensation (for example, a sensation of relaxation, refreshment, or romantic) to a person under illumination of the light emitting unit.

The state where the lower limit value and the upper limit value of the emission color wavelength are Q _L ′ and Q _H ′, respectively, is interpreted as belonging to a state where the wavelength of the emission color is changed within the range from Q _L to Q _H. . Here, the unit of Q _L , Q _H , Q _L ′ and Q _H ′ is nm (nanometer), and 0 <Q _L <Q _H , 0 <Q _L ′ <Q _H ′, Q _L ≦ Q _L ′ and Q _H ′ ≧ Q _H. Therefore, for example, the control for changing the wavelength of the emission color within the range from 500 nm to 550 nm belongs to the control for changing the wavelength of the emission color within the range from 490 nm to 560 nm.

  Further, for example, the light emission control device changes the sensitivity of a human being under illumination by the light emitting unit by the light emission of the light emitting unit.

  As a result, it is possible to lead the human sensibility under illumination of the light emitting unit to a comfortable one.

  An illumination device according to the present invention includes a light emitting unit whose emission color is variable and the light emission control device that controls the light emitting unit.

  According to such an illuminating device, since the emission color fluctuates moderately, it is possible to give a comfortable sensibility to a person under illumination of the light emitting unit.

  The diffusion device with illumination according to the present invention includes the illumination device and a diffusion unit that diffuses a volatile substance.

  According to such a diffusing device, since the emission color fluctuates moderately, it is possible to give a comfortable sensibility to a person under illumination of the light emitting unit. Furthermore, if the type of the volatile substance is appropriately selected, an action due to diffusion of the volatile substance is added, and an action that brings a comfortable feeling is expected.

  Further, in the light emission control method for controlling a light emitting unit having a variable light emission color, the light emission color is changed over time using a function of time including an addition result of a plurality of sine wave expressions having different frequencies. May be. Further, a program for realizing the light emission control method may be formed.

  If these light emission control methods or programs are used, the light emission color fluctuates moderately, so that it is possible to give a comfortable sensibility to a person under illumination of the light emitting unit.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the light emission control apparatus, the illuminating device, and the illuminating diffuser which contribute to making a human have comfortable sensibility.

  The significance or effect of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely one embodiment of the present invention, and the meaning of the term of the present invention or each constituent element is not limited to that described in the following embodiment. .

It is a figure for demonstrating the content of the candle experiment which concerns on embodiment of this invention. It is a wave form diagram of the function according to the brightness fluctuation in the flame of a candle. It is a functional block diagram of the aroma pot which concerns on embodiment of this invention. It is an internal block diagram of the light emitting element shown by FIG. 1 is an external perspective view of an aroma pot according to an embodiment of the present invention. It is sectional drawing of the aroma pot which concerns on embodiment of this invention. It is a figure for demonstrating the content of on / off control of LED. FIG. 4A is a relationship image diagram of light emission color, function f (t), light emission ratios duty _R and duty _{G in} the virtual illumination mode, and FIG. 4B is an image diagram of temporal change in the light emission color in the virtual illumination mode. It is a figure which shows the relationship between the value of a function f (t), and light emission luminance. It is a figure which shows the look-up table which can be used in order to determine the light emission ratio of each LED. It is the figure which showed a mode that the parameter for determining the light emission ratio of each LED from the value of a function f (t) was set for every illumination mode. It is a figure which shows the operation | movement flowchart of the aroma pot which concerns on embodiment of this invention. It is a schematic image figure of the luminescent color change in two illumination modes utilized for experiment. It is a figure which shows the outline | summary of the question paper used in the 1st sensitivity evaluation experiment. It is a figure showing the 1st-13th evaluation color used in the 1st sensitivity evaluation experiment. It is a figure which shows the sensitivity map obtained by the 1st sensitivity evaluation experiment. It is the figure which extracted the part which is concerned with "relaxation" from the sensitivity map of FIG. It is the figure which extracted the part which concerns on "refreshing" from the sensitivity map of FIG. It is the figure which extracted the part which concerns on "romantic" from the sensitivity map of FIG. It is a figure showing the light emission conditions of three illumination modes corresponding to the sensitivity of "relaxation", "refresh", and "romantic". It is a figure showing the 1st-7th parameter conditions used in the 2nd sensitivity evaluation experiment. It is a bar graph figure based on the result of the 2nd sensitivity evaluation experiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In each of the drawings to be referred to, the same part is denoted by the same reference numeral, and redundant description regarding the same part is omitted in principle.

  In the present embodiment, a description will be given of an illuminated fragrance diffusing device that employs a special illumination method that makes a human feel comfortable.

  As already mentioned, a general lighting device keeps lighting at a constant brightness once activated, but the control to keep the brightness constant gives an artificial image to humans and survives in harmony with nature. It is not necessarily comfortable control for the human being. On the other hand, fluctuations (so-called 1 / f fluctuations, etc.) exist in all physical phenomena and biological phenomena in nature, and such fluctuations are said to have a pleasant effect on humans. This is the case, for example, in the light and dark fluctuations of the candle flame. Therefore, first, the light-dark change due to the candle flame was verified by experiments. This experiment is called a candle experiment for convenience.

  In the candle experiment, an ignited candle was housed in a translucent cylindrical body having a hollow inside, and a moving picture was taken with the digital video camera of the cylindrical body in which the candle was housed. The moving image 300 obtained in this manner is reproduced on the display screen 310 of the display device as shown in FIG. 1, and the flame portion of the candle (not shown) in the cylinder 321 on the reproduced moving image 300. The luminance (corresponding to the portion in the broken line frame 320 in FIG. 1) was measured as the luminance of the candle flame using the luminance meter 330. In the display screen 310 of FIG. 1, a portion with relatively high luminance is shown as relatively white, and a portion with relatively low luminance is shown as relatively black.

From this measurement result, the power spectrum of the brightness of the candle flame was obtained. According to this power spectrum, it was found that the change in brightness of the candle flame mainly consists of five frequency components. That is, the power has a maximum value at each of the first to fifth frequencies on the power spectrum, and as a result, the brightness of the candle flame is the first to fifth frequencies corresponding to the five frequency components. I found out that I was wandering in each of the. The first to fifth frequencies are represented by f _{1 to} f _5, respectively. The unit of the frequencies f _{1 to} f ₅ is Hz (Hertz). As an example, specifically, (f ₁ , f ₂ , f ₃ , f ₄ , f ₅ ) = (0.80, 0.68, 0.48, 0.30, 0.20). That is, the frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₅ were 0.80, 0.68, 0.48, 0.30 and 0.20 Hz, respectively. Therefore, in the following, unless otherwise specified, (f ₁ , f ₂ , f ₃ , f ₄ , f ₅ ) = (0.80, 0.68, 0.48, 0.30, 0.20) To do.

  The brightness of the candle flame actually fluctuated even at a frequency of 1 Hz or higher, and even on the playback screen of the moving image 300, the luminance fluctuation due to the frequency of 1 Hz or higher was observed. However, the relatively high-frequency luminance fluctuation in the lighting device looks like flickering of a deteriorated light bulb, and it is difficult to contribute to the realization of a comfortable lighting device aimed at by this embodiment. Therefore, when determining the frequency of fluctuation in the luminance of the candle flame using the luminance meter 330, the luminance change component of 1 Hz or more was ignored. In the following, it is assumed that the change in brightness of the candle flame consists of only the above five frequency components, for example.

Then, the brightness value of the flame of the candle is the sum of the value of the function f (t) and the constant DC component value. The function f (t) represents the alternating current component of the brightness of the candle flame. The following formula (1) is a definition formula of the function f (t), and the following formula (2) is a definition formula of the function x _i (t). i is an integer.

The expression of the function x _i (t) is an expression of the i th sine wave having the i _th frequency f _i . That is, the function x _i (t) is a sine function. However, it can be said that the function x _i (t) is a cosine function when θ _i which is the initial phase of the i-th sine wave is π / 2. Similarly, when θ _i is π / 2, the expression of the function x _i (t) can be said to be an expression of the i-th cosine wave having the i-th frequency. The waveform represented by the right side of Expression (2) is referred to as a sine wave without distinction.

π is the circumference ratio. t represents time. The unit of t is second. Therefore, the function x _i (t) is a function of time. As shown in the equation (1), the function f (t) is a function obtained by weighted addition of the functions x ₁ (t) to x ₅ (t), so the function f (t) is also a function of time. . α _i is a weighting coefficient for the function x _i (t) in this weighted addition.

Using the power spectrum, by comparing the powers of the five frequency components, the ratio between the weighting coefficients α _{1 to} α ₅ was determined.
α ₁ : α ₂ : α ₃ : α ₄ : α ₅ = 0.28: 0.26: 0.39: 0.25: 0.27
Met. Therefore, in the following, unless otherwise specified, (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.28, 0.26, 0.39, 0.25, 0.27). To do.

In the graph of FIG. 2, a curve 350 represents the time dependency of the value of the function f (t) when the initial phases θ _{1 to} θ ₅ are all π / 2. In FIG. 2, the horizontal axis is time t and the vertical axis is f (t). The function f (t) is a function obtained by adding an increase / decrease of about 2, 3, 5 seconds to a fine increase / decrease approximately every 1 second. In other words, it was found that the brightness of the candle flame increases and decreases approximately every 1, 2, 3, and 5 seconds. Note that θ _{1 to} θ ₅ in the function f (t) can take arbitrary angle values. The angle values of θ _{1 to} θ ₅ may be common or the angle values may be different from each other. In the following description, it is assumed that θ _{1 to} θ ₅ are all π / 2 unless otherwise specified.
[Basic configuration of aroma pot]
The basic structure of the aroma pot 1 as a fragrance diffuser with illumination (or a fragrance diffuser with illumination) formed based on the above-mentioned candle experiment will be described. FIG. 3 is a functional block diagram of the aroma pot 1. The aroma pot 1 is provided with each part referred by the codes | symbols 11-20. The heat generating part 15 is inherent in the perfume diffusing part 14.

  The power source 11 is a primary battery such as an alkaline battery or a secondary battery such as a nickel metal hydride battery. The power supply circuit 12 generates a DC voltage having a desired voltage value using the power of the power supply 11, and outputs the generated DC voltage as an internal power supply voltage. Each part in the aroma pot 1 including the fragrance diffusing unit 14, the light emitting circuit 17, the main control unit 19, and the parameter ROM 20 operates using the internal power supply voltage from the power supply circuit 12 as a drive source. The power switch 13 is a switch for instructing whether or not to operate the aroma pot 1, and the power switch 13 is turned on or off by the user. When the power switch 13 is on, the internal power supply voltage is generated and the aroma pot 1 operates. When the power switch 13 is off, the internal power supply voltage is not generated and the aroma pot 1 does not operate. Hereinafter, it is assumed that the power switch 13 is turned on unless otherwise specified.

  The fragrance diffusing section 14 is a part for diffusing the fragrance, and includes a fragrance containing section (fragrance containing section 60 described later; see FIG. 6) and a heat generating section 15 for containing the fragrance. The heat generating unit 15 is heated under the control of the main control unit 19. The temperature of the fragrance | flavor accommodated in the fragrance | flavor accommodating part also rises by the temperature rise of the heat generating part 15, and a fragrance | flavor diffuses toward the exterior of the aroma pot 1 by this. The fragrance to be diffused in the fragrance diffusing section 14 is an arbitrary fragrance, and is, for example, an aroma oil that is a liquid obtained by diluting an essential oil (essential oil).

  As shown in FIG. 4, the light emitting element 16 includes a three-color LED (Light Emitting Diode) composed of an LED 16R that emits light in red, an LED 16G that emits light in green, and an LED 16B that emits light in blue, and the LEDs 16R, 16G, and 16B By adjusting the light emission ratio, visible light of any color can be emitted. Adjustment of the light emission ratio is performed by the main control unit 19. The light emitting circuit 17 causes each of the LEDs 16R, 16G, and 16B to emit light at an arbitrary light emission ratio under the control of the main control unit 19.

  The aroma pot 1 can operate in any of N lighting modes (N is an integer of 2 or more). The light emitting state of the light emitting element 16 is different between arbitrary different illumination modes. The light emission state of the light emitting element 16 includes the light emission color and light emission luminance of the light emitting element 16. An illumination mode in which the aroma pot 1 actually operates is referred to as a selective illumination mode. The user can designate the selected illumination mode using the mode switch 18.

  The main control unit 19 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like, and comprehensively controls the operation of each part in the aroma pot 1. The main control unit 19 determines the selected illumination mode based on the state of the mode changeover switch 18 and reads out a parameter corresponding to the selected illumination mode from the parameter ROM 20. Then, the main control unit 19 controls the light emitting circuit 17 according to the read parameters to cause the light emitting element 16 to emit light in a light emitting state corresponding to the selected illumination mode.

The parameter ROM 20 is a ROM (Read Only Memory) that stores parameters corresponding to each illumination mode. Parameters stored in the parameter ROM 20 can be set in advance at the design stage or manufacturing stage of the aroma pot 1. Details of the parameters will be described later. The function f (t) itself is defined in the main control unit 19, but specific numerical values of f _{1 to} f ₅ and α _{1 to} α ₅ are stored in the parameter ROM 20. By reading these numerical values by the main control unit 19, the main control unit 19 recognizes the function f (t).

  FIG. 5 is an external perspective view of the aroma pot 1. The outer shape of the aroma pot 1 is, for example, a substantially cylindrical shape, and the fragrance is released from the opening 50 provided on the upper surface of the cylinder that is the outer shape of the aroma pot 1. The appearance of the aroma pot 1 can be arbitrarily changed.

  FIG. 6 is a cross-sectional view of the aroma pot 1 by a cross section along the central axis of the cylinder. As shown in FIG. 6, each part referred to by reference numerals 50 to 66 is provided in the aroma pot 1. In FIG. 6, reference numeral 51 denotes a main housing of the aroma pot 1. The main housing 51 is a cylindrical member having a bottom surface. A base 52 is fixed inside the main housing 51 and on the bottom surface side of the main housing 51, and a battery housing portion 53 for housing the battery 54 is provided inside the base 52. The substrates 55 and 56 are fixed to the upper side of the base 52 through spacers. Reference numeral 57 denotes an LED unit mounted on the substrate 56.

  A tray 58 is provided on the upper side of the internal space of the main housing 51, and the fragrance is accommodated in the fragrance accommodating portion 60 that is a space between the tray 58 and the lid 59 (in FIG. 6, the fragrance is accommodated). The illustration is omitted.) The lid 59 is detachable from the main housing 51, and the user can place the fragrance on the tray 58 with the lid 59 removed from the main housing 51. The lid 59 is fixed to the main housing 51 by fitting the end of the lid 59 and the end of the tray 58 (FIG. 6 is a cross-sectional view when this fitting is performed).

  Reference numeral 61 denotes a heating element made of aluminum, and reference numeral 62 denotes a PTC (Positive Temperature Coefficient) thermistor that is thermally coupled to the heating element 61. The heating element 61 and the PTC thermistor 62 are disposed on the substrate 63. Reference numeral 64 denotes an internal housing for holding the heating element 61, the PTC thermistor 62, and the substrate 63 in the vicinity of the tray 58. Reference numeral 65 is a wiring that electrically connects the substrates 55 and 56, and reference numeral 66 is a wiring that electrically connects the substrates 55 and 63.

  The relationship between the site shown in FIG. 3 and the site shown in FIG. 6 will be described. The battery 54 in FIG. 6 corresponds to the power supply 11 in FIG. 3 are not shown in FIG. 6 for the sake of illustration. The output voltage of the battery 54 in FIG. 6 is supplied onto the substrate 55 via a contact mechanism and wiring (not shown). The power supply circuit 12, the main control unit 19, and the parameter ROM 20 in FIG. 3 are mounted on the substrate 55 in FIG. 6, and the light emitting circuit 17 in FIG. 3 is mounted on the substrate 56 in FIG. The LED unit 57 in FIG. 6 corresponds to the light emitting element 16 in FIG. The heating element 61 in FIG. 6 corresponds to the heating part 15 in FIG. The perfume diffusing portion 14 in FIG. 3 is formed including the tray 58 and the heating element 61 in FIG. 6. 3 may be considered to further include the lid 59 of FIG. 6, or may be considered to further include the PTC thermistor 62.

  The main control unit 19 mounted on the substrate 55 heats the fragrance on the tray 58 by causing the heating element 61 to generate heat using the internal power supply voltage generated by the power supply circuit 12, thereby opening the lid 59. The fragrance is diffused from the part 50. A circuit for supplying electric power to the heating element 61 in order to cause the heating element 61 to generate heat is provided on the substrate 63. When the temperature of the heating element 61 becomes abnormally high, the power supplied to the heating element 61 is rapidly reduced by the action of the PTC thermistor 62, and the temperature of the heating element 61 is lowered.

  The main housing 51 and the lid 61 are made of a translucent or transparent resin material, and light from the LED portion 57 as the light emitting element 16 is radiated from the inside to the outside of the main housing 51 and the lid 61. That is, the light from the LED unit 57 illuminates the outside of the aroma pot 1 as illumination light.

Instead of using the battery 54 as the power supply 11 to generate the internal power supply voltage, the internal power supply voltage may be generated using a commercial AC power supply. In this case, the AC voltage from the commercial AC power supply is converted into a DC voltage by the power supply circuit 12, and the DC voltage is output from the power supply circuit 12 as an internal power supply voltage.
[Control method of light emission state]
A method for controlling the light emission state of the light emitting element 16 by the main control unit 19 will be described. Note that control over the light emission state of the light emitting element 16 is referred to as light emission control.

  The main control unit 19 can control the emission color of the light emitting element 16 using the function f (t). Using a timer (not shown) provided in the aroma pot 1, the main control unit 19 determines the value of the function f (t) at each time. The light emission color of the light emitting element 16 is a light obtained by combining the light from the LED 16R, the light from the LED 16G, and the light from the LED 16B. By adjusting the light emission ratio of the LEDs 16R, 16G, and 16B as described above, the light emitting element 16 The 16 emission colors can be any visible light color. Hereinafter, in the present embodiment, when the light emission color is simply referred to, it means the light emission color of the light emitting element 16.

  A state where the current is supplied to the LED 16R and the LED 16R emits light is expressed as the LED 16R is on, and a state where the current is not supplied to the LED 16R and the LED 16R is not emitting is expressed as the LED 16R is off. It is assumed that the value of the current flowing through the LED 16R when the LED 16R is on is constant. The same applies to LEDs other than LED 16R (including LED 16G and LED 16B).

As an LED control method, for example, a method of changing the amount of light perceived by a human by blinking the LED at a period that cannot be recognized by the human eye and changing the duty ratio (the ratio of the on time in one cycle) in the blinking. There is. By applying this method to each color LED, it is possible to control the overall color development and light quantity of each color LED combined. As an example, it is assumed that such a method is used for the aroma pot 1. The light emission ratios of the LEDs 16R, 16G, and 16B are represented by duty _R , duty _G, and duty _B, respectively. The unit of each light emission ratio is%. Duty _R represents a time ratio when the LED 16R is turned on, and (1-duty _R ) represents a time ratio when the LED 16R is turned off. The same applies to duty _G and duty _B. The main control unit 19 calculates the values of duty _R , duty _G, and duty _B , and the issuing circuit 17 applies voltages to the LEDs 16R, 16G, and 16B to cause the LEDs 16R, 16G, and 16B to blink in accordance with those values.

For example, assume that the length of the unit period is 10 milliseconds (10 ms). The unit period arrives every 10 milliseconds. In this case, if the duty _R in a certain attention period is 40%, each unit period belonging to the attention period has an on period having a length of 4 milliseconds and a length of 6 milliseconds as shown in FIG. The LED 16R is turned on in each on period and the LED 16R is turned off in each off period. The average luminance of the LED 16R during a certain unit period is directly proportional to the duty _R during the unit period. That is, for example, when duty _R = 40%, the average luminance of the LED 16R during the unit period is 40/100 of that when duty _R = 100%. Here, a method of controlling the average luminance of the LED 16R during the unit period by controlling the light emission ratio (that is, by controlling on / off of the LED 16R) is illustrated, but the LED 16R is on. You may make it control the average brightness | luminance of LED16R in a unit period by controlling the value of the electric current which flows into LED16R during a period. The same applies to the LEDs 16G and 16B.

  The main control unit 19 changes the emission color of the light emitting element 16 between the first reference color and the second reference color using the function f (t). Here, the wavelength of the light of the first reference color is longer than the wavelength of the light of the second reference color. However, it is possible to make the wavelength of the light of the first reference color shorter than the wavelength of the light of the second reference color.

As described above, since (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.28, 0.26, 0.39, 0.25, 0.27), f (t ) Has a maximum value of 1.45 and f (t) has a minimum value of (−1.45). Accordingly, the main control unit 19 sets the emission color to the first reference color when “f (t) = 1.45” is established, and sets the emission color to the second reference color when “f (t) = − 1.45” is established. The light emitting circuit 17 is controlled so that the light emission color becomes a color between the first and second reference colors when “−1.45 <f (t) <1.45” is satisfied. be able to. Such a light emission control is referred to as a light emission control LC ₁ for convenience. In the emission control LC ₁ , the emission color is gradually changed from the first reference color toward the second reference color as the value of f (t) goes from 1.45 to (−1.45). Therefore, for example, the emission color when f (t) = 1.40 is closer to the first reference color than the emission color when f (t) = 1.30, and f (t) = − 1.40. The emission color when is f is more similar to the second reference color than the emission color when f (t) = − 1.30.

For the sake of specific description, the light emission control LC ₁ executed in the virtual illumination mode will be described assuming the virtual illumination mode. Virtual illumination modes can also be included in the N illumination modes. In the virtual illumination mode, the first reference color is “red” and the second reference color is “green”. FIG. 8A is a relationship image diagram of the emission color, the function f (t), the emission ratios duty _R and duty _G when the emission control LC ₁ is applied to the virtual illumination mode.

When the first reference color is “red” and the second reference color is “green”, the emission color is “red” when “f (t) = 1.45” is established, and “f (t ) = − 1.45 ”, the emission color is“ green ”. In order to realize this, the main control unit 19 turns on only the LED 16R when “f (t) = 1.45” is established, and turns on only the LED 16G when “f (t) = − 1.45” is established. Turn on. That is, when “f (t) = 1.45” is satisfied, “duty _R : duty _G : duty _G = 100: 0: 0” and “f (t) = − 1.45” is satisfied. The light emission ratio of each LED is controlled so that “duty _R : duty _G : duty _G = 0: 100: 0”.

When “−1.45 <f (t) <1.45” is satisfied, the light emission ratio of each LED is set so that the light emission color of the light emitting element 16 is a color between “red” and “green”. To control. The light emission ratio of each LED when “−1.45 <f (t) <1.45” is satisfied, and the light emission ratio of each LED when “f (t) = 1.45” is satisfied and “f (t ) = − 1.45 ″ is determined by linear interpolation based on the light emission ratio of each LED at the time of establishment. Specifically, for example, when “f (t) = 1.45” is established, “duty _R : duty _G : duty _G = 100: 0: 0”, and
Since “duty _R : duty _G : duty _G = 0: 100: 0” when “f (t) = − 1.45” is established,
When “f (t) = 0” is satisfied, “duty _R : duty _G : duty _G = 50: 50: 0”, and
When “f (t) = 0.725” is satisfied, “duty _R : duty _G : duty _G = 75: 25: 0”, and
When “f (t) = − 0.725” is established, “duty _R : duty _G : duty _G = 25: 75: 0” is satisfied.
The light emission ratio of each LED is controlled. When “duty _R : duty _G : duty _G = 50: 50: 0”, the emission color is almost yellow.

  FIG. 8B is an image diagram of the temporal change of the emission color in the virtual illumination mode. The horizontal direction in FIG. 8B corresponds to time t. In FIG. 8B, for convenience of illustration, a portion where the emission color is closer to red is shown in black, and a portion where the emission color is closer to green is shown in white.

In the light emission control LC ₁ , not only the light emission color of the light emitting element 16 but also the light emission luminance of the light emitting element 16 is controlled using the function f (t). The light emission luminance of the light emitting element 16 is the overall luminance of the light emitting element 16 obtained by the light emission of the LEDs 16R, 16G, and 16B. Since each LED blinks at high speed, the light emission luminance of the light emitting element 16 is given as an average luminance during a certain period. The average period is the unit period or an integral multiple of the unit period. Hereinafter, in the present embodiment, when simply referred to as light emission luminance, it refers to the light emission luminance of the light emitting element 16.

As shown in FIG. 9, when the emission control LC ₁ is executed, the main control unit 19 sets the emission luminance to the upper limit luminance L _MAX when “f (t) = 1.45” is established and sets “f (t) = The value of f (t) is 1.45 so that the emission luminance becomes the lower limit luminance L _MIN when -1.45 "is satisfied, and when" -1.45 <f (t) <1.45 "is satisfied. The light emission circuit 17 is controlled so that the emission luminance gradually decreases from the upper limit luminance L _MAX to the lower limit luminance L _MIN as it goes from (−1.45) to (−1.45). The upper limit luminance L _MAX and the lower limit luminance L _MIN are preset luminances, and L _MAX > L _MIN . That is, the upper limit luminance L _MAX is larger than the lower limit luminance L _MIN .

The target value of the emission luminance when “−1.45 <f (t) <1.45” is established is the upper limit luminance L that is the target value of the emission luminance when “f (t) = 1.45” is established. It is determined by linear interpolation based on the lower limit luminance L _MIN that is the target value of the emission luminance when _MAX and “f (t) = − 1.45” are established. Specifically, for example, the target value of the emission brightness is
“(L _MAX + L _MIN ) / 2” when “f (t) = 0” is satisfied,
When “f (t) = 0.725” is established, “(3L _MAX + L _MIN ) / 4”,
When “f (t) = − 0.725” is established, “(L _MAX + 3L _MIN ) / 4”.
The main control unit 19 controls the light emitting circuit 17 so that the actual light emission luminance matches the target value of the light emission luminance.

As long as the ratio “duty _R : duty _G : duty _G ” is determined, the emission color is determined, but in order to determine the emission luminance, it is necessary to determine individual values of duty _R , duty _G, and duty _B. On the other hand, what luminance is obtained when the values of duty _R , duty _G, and duty _B are determined can be obtained from the characteristic data of the LEDs 16R, 16G, and 16B or the measurement result of the actual luminance. Based on the result obtained here, the LUT 31 of FIG. 10A can be formed. If the ratio “duty _R : duty _G : duty _G ” and the target value of the light emission luminance are input to the LUT 31, the value of the light emission ratio corresponding to those input values (that is, the values of duty _R , duty _G, and duty _B ). Is a lookup table that outputs

On the other hand, as described above, when the value of f (t) is determined, the ratio “duty _R : duty _G : duty _G ” for obtaining a desired emission color and the target value of the emission luminance are determined. Using the contents, the LUT 32 of FIG. 10B can also be formed. The LUT 32 is a look-up table that outputs the value of the light emission ratio corresponding to the input value (that is, the value of duty _R , duty _G, and duty _B ) when the value of f (t) is input.

The main control unit 19 uses the LUT 32 to determine the values of duty _R , duty _G, and duty _B from the value of f (t) at the time of interest, and uses the determined duty _R , duty _G, and duty _B. The light emitting circuit 17 is controlled so that the LEDs 16R, 16G, and 16B blink. Thereby, the light emitting color and the light emission luminance corresponding to the value of f (t) can be generated in the light emitting element 16 at the time of interest.

Actually, parameters defining the relationship between the input and output of the LUT 32 are stored in the parameter ROM 20 of FIG. Accordingly, the main control unit 19, by reading f parameters corresponding to the value of _(t) (duty R, data representing the values of the duty _G and duty _B) from the parameter ROM _20, duty R, the duty _G and duty _B Determine the value.

Although the light emission control LC ₁ in the virtual illumination mode has been described, the first reference color and the second reference color, the upper limit luminance L _MAX and the lower limit luminance L _MIN are set for each illumination mode. All or part of the reference color and the second reference color, and the upper limit luminance L _MAX and the lower limit luminance L _MIN are different. For example, the first and second reference colors are “red” and “green” in a certain illumination mode, while the first and second reference colors are “yellow” and “blue” in another illumination mode.

Therefore, for each illumination mode, a parameter that defines the relationship between the value of f (t) and the values of duty _R , duty _G, and duty _B is set and stored in the parameter ROM 20. That is, the first to Nth parameters shown in FIG. 11 are stored in the parameter ROM 20. The i-th parameter is data that defines the relationship between the value of f (t) in the i-th illumination mode and the values of duty _R , duty _G, and duty _B , which are relative to the i-th illumination mode. It is determined from the set first reference color and second reference color, the upper limit luminance L _MAX and the lower limit luminance L _MIN (i is an integer). The main control unit 19 reads the parameters corresponding to the selected illumination mode from the parameter ROM 20, thereby determining the values of duty _R , duty _G, and duty _B corresponding to the selected illumination mode.

In the i-th illumination mode, when the relationship between the value of f (t) and the values of duty _R , duty _G, and duty _B can be expressed as a formula, the data defining the formula is used as the i-th parameter. May be stored in the parameter ROM 20. In this case, the values of duty _R , duty _G, and duty _B at each time can be determined by calculation by substituting the value of f (t) at each time into the equation.
[Operation flowchart]
Next, the operation procedure of the aroma pot 1 will be described with reference to FIGS. FIG. 12 is a flowchart showing the operation procedure of the aroma pot 1. When the power switch 13 is turned on in step S10, first, in step S11, heat generation in the heat generating portion 15 starts, and thereby diffusion of the fragrance starts. This heat generation continues until the power switch 13 is turned off (except when abnormal heat generation is detected by the PTC thermistor 62 in FIG. 6). In step S11, the main control unit 19 starts measuring time t using a timer (not shown) provided in the aroma pot 1. Time t is an elapsed time from the reference time. The reference time is the time when the power switch 13 is turned on or the predetermined time has elapsed from the time when the power switch 13 is turned on. After the process of step S11, the processes of steps S12 to S15 are sequentially executed.

In step S <b> 12, the main control unit 19 determines the selected illumination mode based on the state of the mode switch 18. In step S <b> 13, the main control unit 19 reads a parameter corresponding to the selected illumination mode from the parameter ROM 20. In subsequent step S14, the main control unit 19 performs light emission control using the parameters read out in step S13. The light emission control here may be the above-described light emission control LC _{1 or} the light emission control LC ₂ described later.

In step S15, when the power switch 13 is turned off, the operation of the aroma pot 1 ends. However, if the power switch 13 is not turned off, the process returns from step S15 to step S12 and the above-described steps S12 to S15 are performed. Repeatedly executed. In this repeating process, the value of f (t) changes with the increase of time t, so the emission color and emission luminance change.
[Light emission state deformation control method]
As can be seen from FIG. 2, the occurrence of a state where the absolute value of f (t) exceeds 1 or 1.1 is rare, and the state where the absolute value of f (t) is 1.45 is an aroma pot. Even if 1 is operated for a long time, it hardly occurs. Therefore, when the above-described emission control LC ₁ is used, the emission color rarely becomes the first or second reference color itself. In consideration of this, the light emission state of the light emitting element 16 may be controlled using the light emission control LC ₂ instead of the light emission control LC ₁ described above.

In the light emission control LC ₂ , the light emission color of the light emitting element 16 is fixed to “first reference color” when “f (t) ≧ TH” is satisfied, and light emission is performed when “f (t) ≦ −TH” is satisfied. The light emission color of the element 16 is fixed to the “second reference color”. TH is a threshold value set in advance so as to satisfy “0 <TH <1.45”. When performing the light emission control LC _2, the main control unit 19, "f (t) ≧ TH " with light emission color at the time of establishment is the first reference color "f (t) ≦ -TH" emission color at the time of establishment of the The light emitting circuit 17 is controlled so that the emission color becomes a color between the first and second reference colors when “−TH <f (t) <TH” is satisfied. The emission control LC _2, the emission color as the value of f (t) is directed from TH (-TH) is made to gradually change toward the first reference color to a second reference color. Therefore, for example, the emission color when “f (t) = TH−0.1” is closer to the first reference color than the emission color when “f (t) = TH−0.2”. The emission color when f (t) = − TH + 0.1 ”is closer to the second reference color than the emission color when“ f (t) = − TH + 0.2 ”(here, TH> 0. 2).

Further, at the time of execution emission control LC _2, the main control unit 19, upon establishment of "f (t) ≧ TH" emission luminance upon establishment of with is the upper limit luminance _{L MAX "f (t) ≦} -TH" The emission luminance becomes the upper limit luminance L as the value of f (t) goes from TH to (−TH) so that the emission luminance becomes the lower limit luminance L _MIN and when “−TH <f (t) <TH” is satisfied. _The light emitting circuit 17 is controlled so as to gradually decrease from _MAX toward the lower limit luminance _LMIN .

Therefore, the operation when the light emission control LC ₂ is applied to the above-described virtual illumination mode is as follows. For the sake of concrete explanation, it is assumed that TH = 1. In this case, the emission color is “red” when “f (t) ≧ 1” is established, and the emission color is “green” when “f (t) ≦ −1” is established. In order to realize this, the main control unit 19 sets “duty _R : duty _G : duty _G = 100: 0: 0” and “f (t) when“ f (t) ≧ 1 ”is satisfied. When “≦ −1” is satisfied, the light emission ratio of each LED is controlled so that “duty _R : duty _G : duty _G = 0: 100: 0”. The light emission ratio of each LED when “−1 <f (t) <1” is satisfied is the light emission ratio of each LED when “f (t) = 1” and “f (t) = − 1”. It is determined by linear interpolation based on the light emission ratio of each LED at the time of establishment. Specifically, for example,
When “f (t) = 0” is satisfied, “duty _R : duty _G : duty _G = 50: 50: 0”, and
When “f (t) = 0.5” is satisfied, “duty _R : duty _G : duty _G = 75: 25: 0”, and
When “f (t) = − 0.5” is satisfied, “duty _R : duty _G : duty _G = 25: 75: 0”
The light emission ratio of each LED is controlled.

The target value of the light emission luminance when “−1 <f (t) <1” is established is the upper limit luminance L _MAX and the target value of the light emission luminance when “f (t) = 1” is satisfied. ) = − 1 ″ is determined by linear interpolation based on the lower limit luminance L _MIN , which is the target value of the emission luminance. Specifically, for example, the target value of the light emission luminance at the time of execution of the light emission control LC ₂ is
When “f (t) = 0” is established, “(L _MAX + L _MIN ) / 2” is set,
When “f (t) = 0.5” is established, “(3L _MAX + L _MIN ) / 4” is set.
When “f (t) = − 0.5” is established, “(L _MAX + 3L _MIN ) / 4” is set.
The main control unit 19 controls the light emitting circuit 17 so that the actual light emission luminance matches the target value of the light emission luminance.

When the light emission control LC ₂ is executed by the main control unit 19, it is sufficient to store parameters suitable for realizing the light emission control LC _{2 in} the parameter ROM 20.
[Relationship between lighting mode and sensitivity]
As mentioned above, lighting methods that emit light with a constant brightness and a constant color, and lighting methods that change the color of light one after another at a constant cycle give humans an artificial image. This method is not appropriate as a method for giving humans a comfortable sensibility. This is especially true for a user who uses an aroma pot in search of comfort (relaxation effect, sleep effect, etc.). On the other hand, as described above, it is said that fluctuations in the natural world such as light and dark fluctuations of candles have a pleasant effect on humans. Considering this, in the aroma pot 1, the emission color and the emission luminance are changed according to the function f (t) simulating the brightness fluctuation of the candle. Thereby, it becomes possible to have a pleasant influence on the user (that is, a person under illumination of the aroma pot 1). In other words, the user can have a comfortable sensibility by illumination.

  By the way, the user can use the mode changeover switch 18 to specify the selected illumination mode according to the sensitivity he / she wants to hold.

  For example, a relaxation lighting mode suitable for giving a sensitivity of “relaxation” and a romantic lighting mode suitable for giving a sensitivity of “romantic” are put in the first to Nth lighting modes. A plurality of colors suitable for giving the sensation of “relax” are set as the first and second reference colors of the relaxation lighting mode, and a plurality of colors suitable for giving the sensibility of “romantic” are romantic It may be set as the first and second reference colors in the illumination mode. Then, when the user wants to have a sensation of “relaxing”, the user can designate the relaxing lighting mode as the selective lighting mode. When the user wants to have a sensitivity of “romantic”, the user sets the romantic lighting mode as the selective lighting mode. Can be specified.

  The first and second reference colors for the relax lighting mode can be determined based on the results of subjective experiments. Specifically, for example, L candidate combinations are selected as candidates for the combination of the first and second reference colors (L is an integer of 2 or more). Each candidate combination includes a first candidate color that is a candidate for the first reference color and a second candidate color that is a candidate for the second reference color. When the combination of the first and second reference colors in the virtual illumination mode described above is a candidate combination, the first and second candidate colors corresponding to the virtual illumination mode are “red” and “green”, respectively (see FIG. 8). ). Then, after actually adopting the first and second candidate colors in the first candidate combination as the first and second reference colors, the aroma pot 1 is operated, and the sensitivity held by the subject at this time is answered in a questionnaire format. Get it. The operation for obtaining this answer is executed individually for the second to Lth candidate combinations. It is preferable that the number of subjects is large (for example, 20 or more). By selecting the candidate combination suitable for giving the most "relaxed" sensibility by analyzing the obtained answer results of each subject using a known principal component analysis, and selecting The first and second candidate colors in the candidate combination may be finally determined as the first and second reference colors in the relax lighting mode. The same applies to the romantic illumination mode.

Illumination mode (for convenience, hereinafter, referred to as illumination mode J _A) to inspire sensibility of "relaxing" Consider. In color therapy, yellow is said to evoke an image of happiness and health, and orange is said to evoke an image of relaxation. In particular, since the color temperature of orange is close to the color temperature of the evening sun, it is said that orange acts on the autonomic nervous system. Here, the yellow wavelength is a wavelength in the range of approximately 580 nm (nanometers) or more and 595 nm or less, or the vicinity thereof, and the orange wavelength is a wavelength in the range of approximately 595 nm or more and 610 nm or less or the vicinity thereof. Considering this, here, it is assumed to set the first and second reference color in the illumination mode J _A respectively orange and yellow. For example, the first reference color target wavelength of the illumination mode _{J A} set 610 nm, setting the second reference color target wavelength of the illumination mode _{J A} to 580 nm. Further, it is assumed that the emission control LC ₁ described above is applied to the illumination mode J _A. In illumination mode _{J A,} LED16R, among 16G and 16B, it is assumed to contribute only LED16R and 16G to the formation of emission color.

Note that in the sets the target wavelength of the first reference color to 610nm illumination mode J _A, for example, the average emission colors during color temperature (unit period of light emission color at the time of establishment of the f (x) = 1.45 This means that the values of duty _R , duty _G, and duty _B when f (x) = 1.45 is satisfied so that the color temperature of the light having a wavelength of 610 nm matches the color temperature of light having a wavelength of 610 nm. Similarly, in the set to 580nm the target wavelength of the second reference color illumination mode J _A, for example, f (x) = - 1.45 emission color in the color temperature (unit period of light emission color at the time of establishment of the Determining the values of duty _R , duty _G and duty _B when f (x) =-1.45 so that the average color temperature matches the color temperature of light having a wavelength of 580 nm. means. The same applies to the first and second reference color target wavelength of the illumination mode J _B below.

13 (a) shows an image diagram of a light emission color change in the lighting mode _{J A.} FIG. 13 (a) is a diagram as if the emission color goes back and forth between yellow and orange in a substantially constant cycle. In practice, however, the emission color changes along the value of f (t). is doing.

Illumination mode (for convenience, hereinafter, referred to as illumination mode J _B) for inspire sensibility of "romantic" Consider. In color therapy, pink is said to evoke the image of cuteness and happiness, and purple is said to evoke the image of recovery and elegance. The pink wavelength here is a wavelength in the range of approximately 650 nm or more and 670 nm or less, or the vicinity thereof, and the purple wavelength is a wavelength in the range of approximately 400 nm or more and 435 nm or less or the vicinity thereof. Considering this, here, it is assumed to set the first and second reference color in the illumination mode J _B respectively pink and purple. For example, the first reference color target wavelength of the illumination mode _{J B} is set to 670 nm, setting the second reference color target wavelength of the illumination mode _{J B} to 400 nm. Further, it is assumed that the emission control LC ₁ described above is applied to the illumination mode J _B. In illumination mode _{J B,} LED16R, among 16G and 16B, it is assumed to contribute only LED16R and 16B to the formation of emission color.

13 (b) is an image view of a light emission color change in the lighting mode _{J B.} When f (t) changes from 1.45 to (−1.45), the emission color changes from pink to purple through purple and blue purple, and f (t) becomes (−1.45). ) To 1.45, the emission color changes from purple to blue-purple and red-purple to pink. FIG. 13 (b) is a diagram as if the emission color goes back and forth between pink and purple at a substantially constant cycle. In practice, however, the emission color varies along the value of f (t). It has changed.

The operation of the illumination mode J _A and J _B was verified in the following experiments. The lighting of the aroma pot 1 to subjects 40 people the aroma pot 1 operating in the illumination mode J _A in a state of being placed in a dark room is observed in the same dark room, whether the "feel" or "I do not feel" relaxed each The subject was made to answer. As a result, it was shown that there were significantly more subjects who answered “feel” relaxation than subjects who answered “not feel”. Similarly, illumination mode J is observed in the same dark room the lighting of the aroma pot 1 to subjects 40 people the aroma pot 1 in a state of being placed in a dark room to work at _B, a romantic "feel" or "I do not feel" Each subject answered. As a result, it was shown that there were significantly more subjects who answered “feel” romantic than those who answered “not felt”. The sign test in statistics was used for the test for distinguishing whether or not the test subject who answered “feel” was significantly more than the test subject who answered “do not feel”. As a result of the test, a significant difference was observed at a significance level of less than 5%. Experimental results on the illumination mode J _A and J _B, effective action on the sensitive by the light emission color change of the illumination mode J _A and J _B are confirmed. Therefore, for example, it is also beneficial to employ the illumination modes J _A and J _B as the relaxation illumination mode and the romantic illumination mode, respectively.

As described above, the aroma pot 1 has a fragrance diffusion function. It is said that the fragrance has various actions, and the effect produced varies depending on the kind of the fragrance. A user who uses the aroma pot 1 can select the type of the fragrance according to the sensibility he / she wants to hold and specify the selected illumination mode. Thereby, the effect | action of a fragrance | flavor is added to the effect | action by the above-mentioned illumination, and the effect | action of having a comfortable sensitivity is further accelerated | stimulated.
[Numerical range of frequency f _i and weighting coefficient α _i ]
Meanwhile, specific values of _f 1 ~f ₅ and alpha ₁ to? ₅ described above, a reference value of _f 1 ~f ₅ and alpha ₁ to? ₅ based on candle experiment was slightly deviated from the reference value The values may be used as values of f _{1 to} f ₅ and α _{1 to} α ₅ . For example, f _{1 to} f ₅ and α _{1 to} α ₅ may be determined within a range satisfying the following inequalities (11) to (20) (the unit of the inequality including f _i is Hz).

0.75 ≦ f ₁ ≦ 0.85 (11)
0.64 ≦ f ₂ ≦ 0.72 (12)
0.41 ≦ f ₃ ≦ 0.55 (13)
0.25 ≦ f ₄ ≦ 0.35 (14)
0.16 ≦ f ₅ ≦ 0.24 (15)
0.26 ≦ α ₁ ≦ 0.30 (16)
0.24 ≦ α ₂ ≦ 0.28 (17)
0.39 ≦ α ₃ ≦ 0.41 (18)
0.23 ≦ α ₄ ≦ 0.27 (19)
0.25 ≦ α ₅ ≦ 0.29 (20)
If f _{1 to} f ₅ and α _{1 to} α ₅ satisfying these inequalities are used, it is considered that the same effect as that obtained when the reference value is used can be obtained.

The grounds for setting the numerical range as described above will be described. In the following, for convenience, the reference value of _{f i} is denoted as _{f iREF,} expressed as inequalities (11) the upper limit value and the lower limit value, respectively _{f iMAX} and _{f Imin} of _{f i} in - (15). Similarly, the reference value of α _i is expressed as α _iREF, and the upper and lower limit values of α _i in the inequalities (16) to (20) are expressed as α _iMAX and α _iMIN , respectively. Then
(F _1MIN , f _1REF , f _1MAX ) = (0.75, 0.80, 0.85),
(F _2MIN , f _2REF , f _2MAX ) = (0.64, 0.68, 0.72),
(F _3MIN , f _3REF , f _3MAX ) = (0.41, 0.48, 0.55),
( _F4MIN , _f4REF , _f4MAX ) = (0.25, 0.30, 0.35),
(F _5MIN , f _5REF , f _5MAX ) = (0.16, 0.20, 0.24),
(Α _1MIN , α _1REF , α _1MAX ) = (0.26, 0.28, 0.30),
(Α _2MIN , α _2REF , α _2MAX ) = (0.24, 0.26, 0.28),
(Α _3MIN , α _3REF , α _3MAX ) = (0.39, 0.39, 0.41),
(Α _4MIN , α _4REF , α _4MAX ) = (0.23,0.25,0.27),
(Α _5MIN , α _5REF , α _5MAX ) = (0.25, 0.27, 0.29)
It is.

  When considering the probabilities of events observed in statistics, the significance probability and significance level in each event are important. For example, the significance probability is considered as a probability that an event may occur by chance, and the significance level is considered as a level that defines a coincidence between chance and necessity based on the significance probability. As a result of observation, if the probability of the obtained event is smaller than the significance level, it is judged that there is a significant difference or significant. The significance level is set to various values depending on the survey target, but is generally set to 5% in many cases. There are several ways of thinking about what 5% means, but the following are examples.

In particular the competition to attain the outcome by the game, the person S _A is, the strength of the relationship between itself makes a game or a person S _B and many times seem almost evenly matched, and was defeated in succession. At this time, it is assumed that there is a question “how many times the person S _A loses, the person S _B can be said to be stronger than the person S _A ”. When strength interpersonal relations S _A and S _B are evenly matched, since the probability that the person S _A loses in the individual game is 1/2, the probability that the person S _A loses 5 consecutive (1/2 ) ⁵ ≒ 0.03, i.e., about 3% (roughly grasped if around 5%). Therefore, the criterion referred to as "the person S _A deems it five times stronger than the person S _B than the continuous Once the losing person S _A", than the person S _A is in a really strong and weak relationship is quite evenly matched probability of determining that a strong person S _B is about 5% will be present. In this way, it is rare to lose 5 consecutive times despite the strong and weak relationship being antagonized, so 5% is often set as the significance level.

Above _{f iMAX, f Imin,} specific values of alpha _iMAX and alpha _Imin is a numerical value defined in accordance with the significance level of 5%. For example, since the numerical value range obtained by giving a range of ± 5% to the reference value 0.80 of f ₁ is “0.76 to 0.84”, f _1MIN and f _1MAX are 0.76 and 0, respectively. .84 can also be set. However, the statistical result does not change sharply with 5% as a boundary, and is considered to have a gentle change with respect to the change in the difference between the actual value of f ₁ and the reference value f _1REF . Such a gentle change occurs similarly for f _{2 to} f ₅ , and similarly occurs for α _{1 to} α ₅ . It was the goal to be able to accommodate all of these changes, the above-mentioned _{f iMAX, f Imin,} specific values of alpha _iMAX and alpha _Imin are determined.
[First sensitivity evaluation experiment]
Next, a subjective experiment (hereinafter referred to as a first sensitivity evaluation experiment) was performed to evaluate what kind of sensibilities the various colors have to humans. In the first sensitivity evaluation experiment, a total of 13 subjects consisting of 6 women and 7 men were allowed to evaluate the sensibilities held for the first to thirteenth evaluation colors. As a matter of course, the first to thirteenth evaluation colors are different from each other.

  Specifically, each subject is allowed to observe the illumination of the aroma pot 1 in a state where the light emission color of the aroma pot 1 is experimentally fixed to the first evaluation color, and each subject has the sensitivity that each subject has by the observation. I made an answer using a questionnaire. Similarly, each subject is allowed to observe the illumination of the aroma pot 1 with the light emission color of the aroma pot 1 being experimentally fixed to the second evaluation color, and the question sheet is sent to each subject about the sensitivity that each subject has. To answer. Similarly, responses from the subjects were obtained for each of the third to thirteenth evaluation colors. In the first sensitivity evaluation experiment, the ambient illuminance of the aroma pot 1 was about 100 lux. In addition, the order in which the first to thirteenth evaluation colors were presented to each subject was random, and the presentation time and observation time for each evaluation color depended on the subject.

  FIG. 14 shows an outline of the question paper used in the first sensitivity evaluation experiment. There are 76 questions on the questionnaire, and each subject answers 76 questions for each evaluation color. One sensitivity word is assigned to each question. A sensitivity word is a word that expresses the sensitivity that human beings can hold. Of course, the total of 76 sensitivity words associated with the 76 questions are different from each other. Each subject evaluated whether or not he / she had sensitivity corresponding to a certain sensitivity word when observing a certain evaluation color in five levels. This evaluation was performed for each evaluation color and for each sensitivity word.

  In FIG. 14, two of 76 questions are shown as an example, and the sensitivity words corresponding to the two questions are “refreshing” and “urban”. Each subject evaluates whether or not he / she received a “slow” impression when observing the i-th evaluation color, and enters the evaluation result on a questionnaire. Similarly, each subject evaluates whether or not he has received an “urban” impression when observing the i-th evaluation color, and enters the evaluation result on a questionnaire. Similar entries are made for the remaining 74 questions.

FIG. 15 is a table showing the first to thirteenth evaluation colors. The first to thirteenth evaluation colors are pink, shocking pink, red, vermilion, orange, yellow, yellow-green, green, blue-green, light blue, blue, purple, and white-blue, respectively. White blue is also called pale blue. When the i-th evaluation color is displayed on a monitor of an experimental personal computer (hereinafter referred to as an experimental PC), the values of the R, G, and B signals to be supplied to the monitor are RGB values. To tell. FIG. 15 shows RGB values corresponding to each evaluation color. Each of the R signal, the G signal, and the B signal is an 8-bit digital signal having an integer value of 0 or more and 255 or less. The greater the value R _{SV of the} R signal, the stronger the red component of the light, the greater the value G _{SV of the} G signal, the stronger the green component of the light, and the greater the value B _{SV of the} B signal, the greater the blue component of the light. Strong strength.

As shown in FIG. 15, RGB values (R _SV , G _SV , B _SV ) corresponding to the first to thirteenth evaluation colors are respectively
(255, 25, 255),
(255, 0, 128),
(255, 0, 15),
(255, 60, 0),
(255, 175, 0),
(200, 255, 0),
(40, 255, 0),
(0, 180, 15),
(0, 255, 255),
(0, 50, 255),
(0, 0, 255),
(40, 0, 115),
(70, 70, 255),
Met.

Evaluation data _EDATA consisting of the results of all 13 subjects was analyzed by principal component analysis, which is one method of multivariate analysis. Since the principal component analysis method itself is well known, a detailed explanation is omitted here. Note that the above-described evaluation method used in the first sensitivity evaluation experiment is a general method in the field of psychology, and is also used in a sensory test.

By the principal component analysis, the first principal component and the second principal component orthogonal to each other are extracted from the evaluation data _EDATA, and the axis corresponding to the first principal component and the axis corresponding to the second principal component are set to the horizontal axis and the vertical axis. A sensitivity map along the axis was created, and several sensitivity words out of the 76 sensitivity words were mapped onto the sensitivity map. FIG. 16 shows a sensitivity map with this mapping. The upper limit value and the lower limit value of the load amount of the first principal component corresponding to the horizontal axis of the sensitivity map are 1.0 and (−1.0), respectively, and the second principal component corresponding to the vertical axis of the sensitivity map. The upper limit value and the lower limit value of the load amount are 1.0 and (−1.0), respectively. For example, the load amounts of the first and second principal components in the sensitivity word “Refreshing” are approximately 0.85 and 0.40, respectively, and the load amounts of the first and second principal components in the sensitivity word “urban”. Are approximately 0.05 and (−0.60), respectively.

On the sensitivity map of FIG. 16, the corresponding positions of several evaluation colors are also shown. The load amounts of the first and second principal components corresponding to the first evaluation color are calculated from the evaluation data _EDATA, and the corresponding positions of the calculated load amounts are mapped on the sensitivity map. The mapped corresponding position is called a sensitivity position for convenience. By performing the same calculation process for evaluation colors other than the first evaluation color, the sensitivity position of each evaluation color is obtained.

In FIG. 16, the positions of the arrowheads of arrows AR ₉ , AR ₈ , AR ₇ , AR ₆ , AR ₅ , AR ₃ , AR ₁ , AR _12, and AR ₁₃ are respectively
Sensitivity position of blue green, which is the ninth evaluation color,
A green sensory position as the eighth evaluation color;
The yellow green color sensitivity position, which is the seventh evaluation color,
The yellow sensitivity position, which is the sixth evaluation color,
Orange sensitivity position as the fifth evaluation color,
The red evaluation position, which is the third evaluation color,
Sensitivity position of pink color which is the first evaluation color,
The purple evaluation position which is the twelfth evaluation color, and
The sensitivity position of white blue which is the thirteenth evaluation color is shown.

  Of the nine evaluation colors whose sensitivity positions are shown in FIG. 16, the sensitivity position of red is closest to the mapping position of the sensitivity word “warm”. This indicates that, among the nine evaluation colors, when the “red” color was observed, the test subject received the strongest “warm” impression. The same applies to other sensitivity words.

  On the sensitivity map, a plurality of sensitivity words gathered at positions close to each other form a group of meanings that are somewhat similar. FIG. 17 is a sensitivity map diagram in which only the portion corresponding to the first unit is extracted from FIG. 16, and FIG. 18 is a sensitivity map diagram in which only the portion corresponding to the second unit is extracted from FIG. FIG. 19 is a sensitivity map diagram in which only the portion corresponding to the third unit is extracted from FIG. FIG. 16 corresponds to a diagram obtained by synthesizing FIGS.

  In FIG. 17, a region 411 surrounded by a broken line is a region on the sensitivity map including the mapping positions of the sensitivity words belonging to the first unit. The sensibility words belonging to the first group are the sensibility words “calm”, “easy to sleep”, “refreshing”, “relaxed”, “clean”, “soft”, “comfortable” and “friendly”. including. The concept common to all the sensitivity words belonging to the first group is “relaxation”. The region 411 also includes a blue-green sensitive position that is the ninth evaluation color, a green sensitive position that is the eighth evaluation color, and a yellow-green sensitive position that is the seventh evaluation color. Therefore, it can be seen that blue-green, green, and yellow-green as the ninth, eighth, and seventh evaluation colors are colors suitable for giving a sense of “relaxation”.

  Therefore, in the process of changing the emission color according to the function f (t), the timing at which the emission color becomes the ninth evaluation color, the timing at which the emission color becomes the eighth evaluation color, and the emission color become the seventh evaluation color. If there is a timing to become, it is presumed that a person who is under illumination of the luminescent color can have a sensitivity of “relaxation”. At this time, after changing the timing relationship of the timing in various ways, when multiple subjects were asked about the impression of the luminescent color (whether or not they have the sensibility of relaxation), it depends on the timing relationship of the timing. There was no difference. That is, in order to have a sensitivity of “relaxation”, it is important to change the emission color between the ninth, eighth, and seventh evaluation colors, and the ninth, eighth, and seventh evaluation colors. It was found that the order of presentation was not a problem.

  In FIG. 18, a region 412 surrounded by a broken line is a region on the sensitivity map that includes the mapping positions of the sensitivity words belonging to the second unit. Sensitivity words belonging to the second unit include the sensitivity words “healthy”, “healthy”, “bright”, “positive”, “happy”, “active” and “warm”. . The concept common to all the sensitivity words belonging to the second group is “refresh”. The region 412 also includes a yellow sensitivity position that is the sixth evaluation color, an orange sensitivity position that is the fifth evaluation color, and a red sensitivity position that is the third evaluation color. Therefore, it can be seen that yellow, orange, and red as the sixth, fifth, and third evaluation colors are colors suitable for giving the sensation of “refresh”.

  Therefore, in the process of changing the emission color according to the function f (t), the timing at which the emission color becomes the sixth evaluation color, the timing at which the emission color becomes the fifth evaluation color, and the emission color becomes the third evaluation color. If there is a timing to become, it is presumed that a person under the illumination of the luminescent color can have a sensitivity of “refresh”. At this time, after changing the timing relationship of the timings in various ways, when multiple subjects were asked about the impression of the luminescent color (whether they have a refreshing sensibility or not), it depends on the timing relationship of the timings. There was no difference. In other words, in order to have a sensitivity of “refresh”, it is important to change the emission color between the sixth, fifth, and third evaluation colors, and the sixth, fifth, and third evaluation colors. It was found that the order of presentation was not a problem.

  In FIG. 19, an area 413 surrounded by a broken line is an area on the sensitivity map including the mapping positions of the sensitivity words belonging to the third unit. The sensitivity words belonging to the third unit include the sensitivity words “elegant”, “romantic”, “urban”, “classy”, “adult” and “classy”. The concept common to all the sensitivity words belonging to the third unit is “romantic”. The region 413 also includes a pink sensitive position that is the first evaluation color, a purple sensitive position that is the twelfth evaluation color, and a white blue sensitive position that is the thirteenth evaluation color. Therefore, it can be seen that the pink, purple, and white blue as the first, twelfth, and thirteenth evaluation colors are colors that are suitable for giving a sensitivity of “romantic”.

  Therefore, in the process of changing the emission color according to the function f (t), the timing at which the emission color becomes the first evaluation color, the timing at which the emission color becomes the twelfth evaluation color, and the emission color becomes the thirteenth evaluation color. If there is a timing to become, it is presumed that a person under the illumination of the luminescent color can have a sensitivity of “romantic”. At this time, after changing the timing relationship of the timing in various ways, when multiple subjects were asked about the impression of the luminescent color (whether or not they have a romantic sensibility), they depend on the timing relationship of the timing. There was no difference. In other words, in order to have a sensitivity of “romantic”, it is important to change the emission color between the first, twelfth and thirteenth evaluation colors, and the first, twelfth and thirteenth evaluation colors. It was found that the order of presentation was not a problem.

Note that the regions 411 to 413 do not overlap each other on the sensitivity map. Therefore, the sensitivity word belonging to the first group, the sensitivity word belonging to the second group, and the sensitivity word belonging to the third group do not overlap each other.
[Setting of 3 lighting modes]
From the analysis result for the first sensitivity evaluation experiment, three illumination modes M _LX , M _FS and M _MN corresponding to “relaxation”, “refresh” and “romantic” can be formed. Among the first to Nth illumination modes, the illumination mode M _LX can be included as a relaxation illumination mode, the illumination mode M _FS can be included as a refresh illumination mode, and the illumination mode M _MN as a romantic illumination mode. Can be included.

The relaxing lighting mode is a lighting mode suitable for giving the user (that is, the person under the lighting of the aroma pot 1) the feeling of “relaxing”, and the refreshing lighting mode is the feeling of “refreshing” to the user. The romantic lighting mode is a lighting mode suitable for making the user feel “romantic”. 20A to 20C show the light emission conditions of the illumination modes M _LX , M _FS and M _MN .

As shown in FIG. 20 (a), the first and second reference colors of the illumination mode _MLX are yellow green, which is the seventh evaluation color, and blue green, which is the ninth evaluation color, respectively. Green as the eighth evaluation color is adopted as the intermediate reference color of _LX . The intermediate reference color represents an intermediate color between the first reference color and the second reference color, and the emission color matches the intermediate reference color in the process in which the emission color changes between the first and second reference colors. There is a timing to do. When the value of the function f (t) is zero, the emission color can be matched with the intermediate reference color (the same applies to the illumination modes _MFS and _MMN described later). However, the emission color when f (t) ≠ 0 and | f (t) | ≠ 1.45 (for example, the emission color when f (t) = 0.1) matches the intermediate reference color. 3 may be controlled (the same applies to the illumination modes _MFS and _MMN ).

In the lighting mode _{M LX} of FIG. 20 (a), that the emission control LC ₁ described above can be used are envisaged. Therefore, in the period when the illumination mode _MLX is designated as the selected illumination mode by the mode changeover switch 18 in FIG. 3, the emission color becomes yellow green as the first reference color when f (t) = 1.45 is established, When f (t) = − 1.45 is established, the emission color is blue-green as the second reference color. However, it is also possible to use the light emission control LC ₂ described above for the illumination mode _MLX . In the illumination mode _MLX , the target wavelengths of the first reference color, the intermediate reference color, and the second reference color are set to about 550 nm (nanometer), about 530 nm, and about 490 nm, respectively. The meaning of the target wavelength is as described above. Among the target wavelengths of the first reference color, the intermediate reference color, and the second reference color, the target wavelength of the first reference color is the longest and the target wavelength of the second reference color is the shortest (also for the illumination modes _MFS and _MMN) . The same).

Thus, in the illumination mode _MLX , the emission color is changed so that the emission color includes green in the process of changing the emission color. In other words, in the illumination mode _MLX , the emission color is changed in green. In other words, in the illumination mode _MLX , the emission color is changed between yellow green and blue green.

If attention is paid to the wavelength of the luminescent color, in the illumination mode _MLX , the wavelength of the luminescent color is changed in a range from about 490 nm to 550 nm. However, considering the significance level described above, it is considered that the same effect is given to the user even if the wavelength range in the emission color of the illumination mode _MLX is slightly expanded from the above. However, if the wavelength range is enlarged too much, the first and second reference colors of the illumination mode _MLX deviate from yellow green and blue green. The target wavelength of the first reference color can be increased or the target wavelength of the second reference color can be decreased within a range in which this deviation does not occur in consideration of the significance level described above. For example, the illumination mode M _LX It is also possible to set the target wavelengths of the first and second reference colors at 560 nm and 490 nm, respectively. In this case, in the illumination mode _MLX , the wavelength of the emission color is changed in the range from 490 nm to 560 nm.

As shown in FIG. 20 (b), first and second reference color illumination mode M _FS, respectively, is yellow is red and evaluation color sixth is the third evaluation color of the illumination mode M _FS Orange as the fifth evaluation color is adopted as the intermediate reference color.

In the illumination mode M _FS in FIG. 20B, it is assumed that the above-described light emission control LC ₁ is used. Therefore, in the period when the illumination mode _MFS is designated as the selective illumination mode by the mode changeover switch 18 in FIG. 3, the emission color is red as the first reference color when f (t) = 1.45 is established, and f When (t) = − 1.45 is established, the emission color is yellow, which is the second reference color. However, it is also possible to use the light emission control LC ₂ described above for the illumination mode _MFS . In the illumination mode _MFS , the target wavelengths of the first reference color, the intermediate reference color, and the second reference color are set to about 610 nm (nanometer), about 580 nm, and about 570 nm, respectively.

Thus, in the illumination mode _MFS , the emission color is changed so that the emission color includes red in the process of changing the emission color. In other words, in the illumination mode _MFS , the emission color is changed in red. In other words, in the illumination mode _MFS , the emission color is changed between red and yellow.

If attention is paid to the wavelength of the luminescent color, in the illumination mode _MFS , the wavelength of the luminescent color is changed in a range of approximately 570 nm to 610 nm. However, considering the significance level described above, it is considered that the same effect is given to the user even if the wavelength range in the emission color of the illumination mode _MFS is slightly expanded from that described above. However, if the wavelength range is enlarged too much, the first and second reference colors of the illumination mode _MFS deviate from red and yellow. The target wavelength of the first reference color can be increased or the target wavelength of the second reference color can be decreased within a range where this deviation does not occur in consideration of the significance level described above. For example, the illumination mode M _FS It is also possible to set the target wavelengths of the first and second reference colors at 630 nm and 560 nm, respectively. In this case, in the illumination mode _MFS , the wavelength of the emission color is changed in the range from 560 nm to 630 nm.

As shown in FIG. 20C, the first and second reference colors of the illumination mode M _MN are the first evaluation color pink and the thirteenth evaluation color white blue, respectively. Purple as the twelfth evaluation color is adopted as the intermediate reference color of _MN .

In the illumination mode M _MN of FIG. 20C, it is assumed that the above-described light emission control LC ₁ is used. Therefore, in the period in which the illumination mode _MMN is designated as the selective illumination mode by the mode changeover switch 18 in FIG. 3, the emission color is pink as the first reference color when f (t) = 1.45 is established When f (t) = − 1.45 is established, the emission color is white blue which is the second reference color. However, it is also possible to use the light emission control LC ₂ described above for the illumination mode _MMN . In the illumination mode _MMN , the target wavelengths of the first reference color, the intermediate reference color, and the second reference color are set to about 400 nm (nanometer), about 430 nm, and about 450 nm, respectively. Note that, in the illumination mode M _MN , unlike the several illumination modes described above, the wavelength of the emission color in the first reference color is shorter than the wavelength of the emission color in the second reference color.

Thus, in the illumination mode _MMN , the emission color is changed so that the emission color includes purple in the process of changing the emission color. In other words, in the illumination mode _MMN , the emission color is changed in a purple color. In other words, in the illumination mode _MMN , the emission color is changed between pink and white blue.

If attention is paid to the wavelength of the luminescent color, in the illumination mode _MMN , the wavelength of the luminescent color is changed in the range from approximately 400 nm to 450 nm. However, in consideration of the above-described significance level, even if the wavelength range in the emission color of the illumination mode _MMN is slightly expanded from the above, it is considered that the same effect is given to the user. However, if the wavelength range is enlarged too much, the first and second reference colors of the illumination mode _MMN deviate from pink and white blue. The target wavelength of the first reference color can be increased or the target wavelength of the second reference color can be decreased within a range in which this deviation does not occur in consideration of the significance level described above. However, it was found that the first reference color deviates from pink if the former increase is carried out by a slight amount, and the second reference color deviates from white blue if the latter decrease is carried out by a slight amount. Therefore, in the illumination mode _MMN , it is desirable to change the wavelength of the emitted color in the range from 400 nm to 450 nm.

The pink color used as the first reference color in the illumination mode M _MN is a pink color close to purple, while the pink color used as the first reference color in the illumination mode J _B is a pink color close to red. . Therefore, the pink wavelengths contemplated by illumination mode _{M MN} (about 400 nm), between the pink wavelengths contemplated by illumination mode _{J B} (about 670 nm), considerable differences exist Yes.

  As described above, the user can designate the selected illumination mode according to the sensitivity he / she wants to hold using the mode changeover switch 18 of FIG. A signal (hereinafter referred to as a mode selection signal) indicating which one of the first to Nth illumination modes should be designated as the selected illumination mode is transmitted from the mode changeover switch 18 to the main control unit 19. The main control unit 19 reads out a parameter corresponding to the mode selection signal from the parameter ROM 20 to emit light in the selected illumination mode.

If the user who does not have the “relax” sensibility designates the illumination mode _MLX as the selected illumination mode and is under illumination by the light emitting element 16, the light emission of the light emitting element 16 in the illumination mode _MLX causes “relaxation”. It will have a sensibility. That is, the sensitivity of the user changes before and after the light emission by the light emitting element 16 (changes from a state of not having “relaxed” sensitivity to a state of having “relaxed” sensitivity). The same applies to the illumination modes M _FS and M _MN corresponding to “refresh” and “romantic”. As described above, the aroma pot 1 has a function as a sensitivity changing device that changes the sensitivity of a human being under illumination by the light emitting element 16 by the light emission of the light emitting element 16.
[Second sensitivity evaluation experiment]
Next, in order to examine the effect of changing the parameters f _i and α _i of the function f (t) from their reference values (f _iREF and α _iREF ), the following subjective experiment (hereinafter, Second sensitivity evaluation experiment).

In the second sensitivity evaluation experiment, a color equivalent to the emission color of the aroma pot 1 in the evaluation target illumination mode was displayed on the motor of the experimental PC, and the display color of the monitor was observed by the subject. The evaluation target illumination modes are illumination modes M _LX , M _FS and M _MN . In the illumination mode M _LX , M _FS or M _MN , the emission color of the aroma pot 1 changes according to the function f (t), so that the color change equivalent to the change of the emission color of the aroma pot 1 is performed on the motor of the experimental PC. The subject was made to observe. The test subjects were 20 persons consisting of 10 women and 10 men. The ambient illuminance of the experimental PC in the second sensitivity evaluation experiment was about 100 lux. _Which lighting mode is to be presented in which order among the lighting modes M _LX , M _FS and M _MN was randomly set for each subject.

The first to seventh parameter conditions were set for the illumination mode _MLX as the first evaluation target illumination mode. FIG. 21 shows the contents of the first to seventh parameter conditions.

Under the first parameter condition, reference values f _{1REF to} f _5REF are set for frequency parameters f _{1 to} f ₅ , _respectively , and reference values α _{1REF to} α _5REF are respectively set to weight parameters α _{1 to} α _5. It was set.

In the second parameter condition, reference values f _{1REF to} f _5REF are set to f _{1 to} f ₅ , respectively, while the values of α ₄ and α ₅ that are weighting coefficients on the low frequency side are determined from the reference values α _4REF and α _5REF . Also increased. However, at this time, by imposing a restriction (a restriction based on a candle experiment) that the total value of α _{1 to} α ₅ is about 1.45, the values of α _{1 to} α ₃ which are weighting coefficients on the high frequency side are used as a reference. The value was smaller than α _{1REF to} α _3REF . Specifically, in the second parameter condition, α ₁ , α _2, and α ₃ were set to 0.10, and α ₄ and α ₅ were set to 0.58.

In the third parameter condition, reference values f _{1REF to} f _5REF are set in f _{1 to} f ₅ , respectively, while the values of α ₁ and α ₂ that are high-frequency side weighting coefficients are set to be _higher than the reference values α _1REF and α _2REF. Increased. However, at this time, by imposing the above limitation, the values of α _{3 to} α ₅ which are the weighting coefficients on the low frequency side are made smaller than the reference values α _{3REF to} α _5REF . Specifically, in the third parameter conditions to set the alpha ₁ and alpha ₂ in Set 0.58 and alpha ₃ to? ₅ to 0.10.

In the fourth parameter condition, upper limit values f _{1MAX to} f _5MAX are set in f _{1 to} f ₅ , respectively, while the weighting coefficient is α ₁ = α ₂ = α ₃ = 0.10 as in the second parameter condition. And α ₄ = α ₅ = 0.58.

In the fifth parameter condition, the upper limit values f _{1MAX to} f _5MAX are set to f _{1 to} f ₅ , respectively, while the weighting coefficient is α ₁ = α ₂ = 0.58 and α ₃ as in the third parameter condition. = Α ₄ = α ₅ = 0.10.

In the sixth parameter condition, the lower limit values f _{1MIN to} f _5MIN are set in f _{1 to} f ₅ , respectively, while the weighting coefficient is α ₁ = α ₂ = α ₃ = 0.10 as in the second parameter condition. And α ₄ = α ₅ = 0.58.

In the seventh parameter condition, the lower limit values f _{1MIN to} f _5MIN are set in f _{1 to} f ₅ , respectively, while the weighting coefficient is α ₁ = α ₂ = 0.58 and α ₃ as in the third parameter condition. = Α ₄ = α ₅ = 0.10.

The first to seventh parameter conditions are set for the illumination mode _MLX as the first evaluation target illumination mode, and the color change in the illumination mode _MLX is applied to the subject on the motor of the experimental PC for each parameter condition. I was allowed to observe. Then, for each parameter condition, each subject answered whether or not the observed color change would make him feel “relaxed”. The answers were given with a score of 10 out of 10. The subject gives a score of 0 if he / she does not have a “relaxed” sensibility by observation, and the subject gets a score closer to 10 points as he / she holds a “relaxed” sensibility strongly.

Regarding the illumination mode _MLX , the average score of 20 subjects was obtained for each parameter condition. In FIG. 22 (a), it shows the average score in the first to seventh parameter condition regarding illumination mode _{M LX} as a bar graph. In the bar graph of FIG. 22A, the bar B _LX [i] represents the average point under the i-th parameter condition for the illumination mode M _LX . Relates illumination mode _{M LX,} the average point in the first to seventh parameter condition, respectively, 8.8,8.2,4.0,8.1,4.2,7.5,4.1 met It was.

The above-described first to seventh parameter conditions are set for the illumination mode _MFS as the second evaluation target illumination mode, and the color change in the illumination mode _MFS is set on the motor of the experimental PC for each parameter condition. The subject was observed. Then, for each parameter condition, each subject answered whether or not the observed color change gave himself a “refresh” sensitivity. The answering method is the same as that for the illumination mode _MLX . Therefore, the subject gives a score of 0 if the sensibility of “refresh” is not held by observation, and the subject gets a score closer to 10 as the sensibility of “refresh” is stronger. It relates illumination mode M _FS, for each parameter conditions to determine the average point score according to the subject of the 20 persons. In FIG. 22 (b), it shows the average score in the first to seventh parameter condition regarding illumination mode _{M FS} as a bar graph. In the bar graph of FIG. 22B, the bar B _FS [i] represents the average point under the i-th parameter condition regarding the illumination mode M _FS . Relates illumination mode _{M FS,} the average point in the first to seventh parameter condition, respectively, 8.8,7.4,4.1,8.3,4.1,6.8,3.5 met It was.

The above-described first to seventh parameter conditions are set for the illumination mode M _MN as the third evaluation target illumination mode, and the color change in the illumination mode M _MN is performed on the motor of the experimental PC for each parameter condition. The subject was observed. Then, for each parameter condition, each subject answered whether or not the observed color change would make him feel “romantic”. The answering method is the same as that for the illumination mode _MLX . Therefore, the subject gives a score of 0 if he does not have a sensitivity of “romantic” by observation, and the subject gets a score closer to 10 points as he holds a sensitivity of “romantic” more strongly. Regarding the lighting mode _MMN , the average score of 20 subjects was determined for each parameter condition. In FIG. 22 (c), it shows the average score in the first to seventh parameter condition regarding illumination mode _{M MN} as a bar graph. In the bar graph of FIG. 22C, the bar B _MN [i] represents an average point under the i-th parameter condition regarding the illumination mode M _MN . Regarding the illumination mode M _MN , the average points under the first to seventh parameter conditions were 8.8, 7.8, 4.5, 8.3, 3.6, 7.0, 3.8, respectively. It was.

FIG. 22D shows a bar graph obtained by averaging the results of FIGS. 22A to 22C for each parameter condition. In the bar graph of FIG. 22D, the bar B _ALL [i] is the average of the points indicated by the bars B _LX [i], B _FS [i], and B _MN [i] in FIGS. Represents a point. The points represented by the bars B _ALL [1] to B _ALL [7] were 8.8, 7.8, 4.2, 8.2, 3.9, 7.1, and 3.8, respectively.

As is apparent from FIGS. 22A to _22D , in any of the illumination modes M _LX , M _FS and M _MN , the low frequency side weighting coefficient is set to be relatively larger than the high frequency side weighting coefficient. The second, fourth, and sixth parameter conditions are more significant in evaluation scores than the third, fifth, and seventh parameter conditions in which the high-frequency side weighting coefficient is relatively larger than the low-frequency side weighting coefficient. It was expensive. In addition, in any of the illumination modes M _LX , M _FS and M _MN , the first parameter condition was slightly higher in evaluation score than the second, fourth and sixth parameter conditions, but they were comparable. There is no significant difference between them when considering the significance level.

Considering the above, taking a representative example, the following first embodiment or second embodiment can be adopted for the aroma pot 1.
[First embodiment]
In the first embodiment, the illumination modes M _LX , M _FS, and M _MN are included in the first to Nth illumination modes as the relax illumination mode, the refresh illumination mode, and the romantic illumination mode, respectively. In the first embodiment, the values of f _i and α _i used in each illumination mode are determined according to the first parameter condition (see FIG. 21) or within a range satisfying the above inequalities (11) to (20). . The first to Nth illumination modes may include only one or two of the illumination modes M _LX , M _FS and M _MN (the same applies to the second embodiment described later). ).

When the relaxing lighting mode is designated as the selective lighting mode, an effect of giving the user a “relaxed” sensibility is obtained, and when the refreshing lighting mode is designated as the selective lighting mode, the user is given a “refreshing” sensibility. When the romantic illumination mode is designated as the selective illumination mode, an effect of giving a “romantic” sensitivity to the user can be obtained. That is, it is possible to make the user have a comfortable sensibility by the illumination of the aroma pot 1. The same applies to the second embodiment described later.
[Second Embodiment]
Also in the second embodiment, the illumination modes M _LX , M _FS and M _MN are included in the first to Nth illumination modes as the relaxation illumination mode, the refresh illumination mode and the romantic illumination mode, respectively. In the second embodiment, the values of f _i and α _i used in each illumination mode are in accordance with the second, fourth, or sixth parameter condition (see FIG. 21). However, with respect to the value of f _i utilized in the illumination mode may be determined arbitrarily within a range that satisfies the inequality (11) to (15).

By the way, in the first parameter condition, (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.28, 0.26, 0.39, 0.25, 0.27) is set. . That is, the high frequency side weighting coefficients α _{1 to} α ₃ are equal to or higher than the low frequency side weighting coefficients α ₄ and α ₅ .

In the second parameter condition, (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.10, 0.10, 0.10, 0.58, 0.58) is set. .

  On the other hand, as described with reference to FIGS. 22A to 22D, when the evaluation results of the second sensitivity evaluation experiment are compared between the first parameter condition and the second parameter condition, those There is no significant difference between them.

Then, for example, even if α _i is determined under a condition between the first parameter condition and the second parameter condition, the user can have the same sensitivity as when the first or second parameter condition is adopted. I can say that. That is, for example, (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.15, 0.15, 0.15, 0.50, 0.50) or (α ₁ , α ₂ , Α ₃ , α ₄ , α ₅ ) = (0.20, 0.20, 0.20, 0.43, 0.43) or (α ₁ , α ₂ , α ₃ , α ₄ , α ₅ ) = (0.25, 0.20, 0.23, 0.40, 0.37) etc., even if the value of α _i is set, the same sensitivity as when the first or second parameter condition is adopted It can be said that the user can be held. That is, if each of α ₄ and α ₅ is made larger than each of α _{1 to} α ₃ , it can be said that the user can have the same sensitivity as when the first or second parameter condition is adopted. Therefore, in each illumination mode of the second embodiment, the value of α _i can be set freely within a range that satisfies the condition that α ₄ and α ₅ are larger than α _{1 to} α ₃ , respectively. Also good. However, the values of α _{1 to} α ₃ should be larger than zero.

In the first or second embodiment, the illumination mode _MLX2 may be included in the first to Nth illumination modes as the second relaxation mode.

The first and second reference colors of the illumination mode _MLX2 are orange and yellow, respectively. In illumination mode _{M LX2,} the target wavelength of the first reference color is set within a range of 595Nm～610nm, the target wavelength of the second reference color is set in the range of 580Nm～595nm. Specifically, for example, the target wavelength of the first and second reference colors in the illumination mode _{M LX2} is set respectively 610nm and 580 nm. In this case, in the illumination mode _MLX2 , the wavelength of the emission color is changed in the range from 580 nm to 610 nm. Thus, in the illumination mode _MLX2 , the emission color is changed so that the emission color includes yellow in the process of changing the emission color. In other words, in the illumination mode _MLX2 , the emission color is changed in yellow. In other words, in the illumination mode _MLX2 , the emission color is changed between orange and yellow. The emission color in the illumination mode M _LX2 is equivalent to the color of light from the actual candle, and the fluctuations in the emission color and emission luminance in the illumination mode _MLX2 are similar to those of the actual candle. Therefore, according to the illumination mode _MLX2 , it is possible to give the user the same relaxing effect as when the user is under the illumination of the candle light.

Further, the first reference color and the second reference color may be interchanged in any illumination mode. For example, in the illumination mode _MLX corresponding to FIG. 20A, blue-green having a wavelength of about 490 nm is set as the first reference color and yellow-green having a wavelength of about 550 nm is set as the second reference color. Also good. The same applies to the illumination modes M _FS , M _MN and M _LX2 .

<< Deformation, etc. >>
The specific numerical values shown in the above description are merely examples, and as a matter of course, they can be changed to various numerical values. As annotation items applicable to the above-described embodiment, annotations 1 to 9 are described below. The contents described in each comment can be arbitrarily combined as long as there is no contradiction.
[Note 1]
You may make it delete the fragrance | flavor spreading | diffusion part 14 from the structure shown in FIG. In this case, the aroma pot 1 functions as a simple lighting device (or light emitting device). Such an illuminating device can be an illuminating device of any form (particularly, for example, an indoor lighting device).
[Note 2]
It is also possible to modify the definition formula of f (t) without departing from the gist described above. For example, instead of f (t) according to the above formula (1), the light emission state of the light emitting element 16 may be controlled using f (t) according to the following formula (1A) or formula (1B). k _A and k _B are predetermined constant values, and k _A is not zero, but k _B may be zero. K is an integer of 6 or more.

[Note 3]
It is most desirable to change both the light emission color and the light emission luminance based on the value of f (t) in order to make humans have a pleasant sensibility, but in any one or more illumination modes, only the light emission color is changed to f ( The light emission luminance may be fixed regardless of the value of f (t) by changing the value based on the value of t). Alternatively, in any one or more illumination modes, only the emission color may be changed based on the value of f (t), and the emission luminance may be changed based on the value of g (t). g (t) is a function of time different from f (t).
[Note 4]
In addition to the N lighting modes, an AUTO lighting mode, a fixed lighting mode, and a light-off lighting mode are provided, and the mode is switched so that the AUTO lighting mode, the fixed lighting mode, or the light-off lighting mode can be designated as the selected lighting mode. The switch 18 and the main control unit 19 may be formed.

  In the AUTO illumination mode, light emission control in a plurality of illumination modes is sequentially switched and executed. For example, when the AUTO illumination mode is designated as the selective illumination mode, light emission control is performed in the i-th illumination mode for a predetermined period, and thereafter, light emission control in the j-th illumination mode is performed. (Where i and j are different integers from 1 to N).

In the fixed illumination mode, the light emission color and the light emission luminance are invariable with respect to time. That is, when the fixed illumination mode is designated as the selective illumination mode, the emission color and the emission luminance are made constant. In the light-off illumination mode, the light emission brightness is always zero (that is, all of the LEDs 16R, 16G, and 16B are always off).
[Note 5]
If necessary, the light emission color of the light emitting element 16 can be made white by mixing the light emission of the LEDs 16R, 16G and 16B. However, when it is necessary to make the emission color white in any of the illumination modes, the light emitting element 16 may be provided with an LED 16W (not shown) in addition to the LEDs 16R, 16G, and 16B. The LED 16W is a white LED that can generate white light alone. When the LED 16W is also provided in the light emitting element 16, the light emission color of the light emitting element 16 is light synthesized from the light from the LEDs 16R, 16G, 16B and 16W, and the light emission luminance of the light emitting element 16 is LED16R, 16G, 16B and 16W. It is the whole brightness | luminance of the light emitting element 16 obtained by light emission.

In the i-th illumination mode, when the emission color of the light emitting element 16 needs to be white, data defining the relationship between the value of f (t) and the values of duty _R , duty _G , duty _B, and duty _W The parameter ROM 20 may be stored as the i-th parameter. Similar to duty _R and the like, duty _W represents the time ratio at which the LED 16W is turned on, and (1-duty _W ) represents the time ratio at which the LED 16W is turned off.
[Note 6]
In the above-described embodiment, it is assumed that the light intensity from the light emitting element 16 is controlled by the main control unit 19 and the index (physical quantity) indicating the light intensity is luminance, but should be controlled. The index representing the light intensity may be an index other than the luminance. Another index is, for example, luminous intensity or illuminance.
[Note 7]
The aroma pot 1 can be configured by a combination of hardware and software. A function realized using software may be described as a program, and the function may be realized by executing the program on the main control unit 19. For example, the above light emission control can be realized using software.
[Note 8]
The diffusion device (illuminated diffusion device) according to the present invention is not limited to the fragrance diffusion device (illuminated fragrance diffusion device) having a fragrance diffusion function. That is, the aroma pot 1 according to the above-described embodiment has a function of diffusing a fragrance as a kind of volatile substance, but should be diffused in a diffusing section of the diffusing device (illuminated diffusing device) according to the present invention. Volatile substances are not limited to perfumes. For example, the volatile substance to be diffused in the diffusing unit of the diffusing apparatus (illuminated diffusing apparatus) according to the present invention is a volatile substance suitable for controlling pests (for example, mosquitoes) or pests (for example, rats). May be. In this case, while obtaining the effect of exterminating pests or pests, it is possible to obtain the effect of having a comfortable sensitivity by illumination.
[Note 9]
For example, it can be considered as follows (see FIG. 3). The light-emitting element 16 functions as a light-emitting portion whose emission color is variable. You may think that the light emission circuit 17 is contained in the component of this light emission part. The main control unit 19 has a function as a light emission control unit that controls the emission color of the light emitting unit and the intensity of light from the light emitting unit. You may think that parameter ROM20 is contained in the component of this light emission control part. The light emitting unit and the light emission control unit may be referred to as an illumination unit and an illumination control unit, respectively. At the same time, the words “light emission color” and “light emission luminance” described in the above-described embodiment can be read as “illumination color” and “illumination luminance”, respectively. The device including the light emitting unit and the light emission control unit functions as a lighting device. The above lighting device can also be referred to as a light emitting device.

DESCRIPTION OF SYMBOLS 1 Aroma pot 50 Opening part 51 Main housing | casing 52 Base 53 Battery accommodating part 54 Battery 55, 56, 63 Board | substrate 57 LED part 58 Receptacle 59 Lid 60 Fragrance | flavor accommodating part 61 Heating element 62 PTC thermistor 64 Internal casing 65, 66 Wiring

Claims (12)

In the light emission control device that controls the light emitting unit whose emission color is variable,
A light emission control device comprising: a light emission control unit that changes the emission color over time using a function of time including a result of adding a plurality of sine wave expressions having different frequencies. The light emission control device according to claim 1, wherein the light emission control unit changes the intensity of light from the light emission unit over time using the function. The light emission control device according to claim 1, wherein the function includes a result of weighted addition of the plurality of sine wave expressions. The plurality of sine waves include first to fifth sine waves,
The function includes a term (α ₁ x ₁ + α ₂ x ₂ + α ₃ x ₃ + α ₄ x ₄ + α ₅ x ₅ ) or a term proportional to the term,
x _i is an expression of the i-th sine wave, α _i is a predetermined weighting coefficient (i is an integer of 1 to 5), and
The frequencies of f _{1 to} f ₅ that are the frequencies of the _first to fifth sine waves are expressed in units of Hz.
0.75 ≦ f ₁ ≦ 0.85,
0.64 ≦ f ₂ ≦ 0.72,
0.41 ≦ f ₃ ≦ 0.55,
0.25 ≦ f ₄ ≦ 0.35, and
0.16 ≦ f ₅ ≦ 0.24 is satisfied,
The weighting factors α _{1 to} α ₅ are:
0.26 ≦ α ₁ ≦ 0.30,
0.24 ≦ α ₂ ≦ 0.28,
0.39 ≦ α ₃ ≦ 0.41,
0.23 ≦ α ₄ ≦ 0.27, and
The light emission control device according to claim 3, wherein 0.25 ≦ α ₅ ≦ 0.29 is satisfied. The frequencies f _{1 to} f ₅ are in units of Hz,
satisfy f ₁ = 0.80, f ₂ = 0.68, f ₃ = 0.48, f ₄ = 0.30 and f ₅ = 0.20,
The weighting factors α _{1 to} α ₅ are:
The light emission control device according to claim 4, wherein α ₁ = 0.28, α ₂ = 0.26, α ₃ = 0.39, α ₄ = 0.25, and α ₅ = 0.27 are satisfied. . The plurality of sine waves include first to fifth sine waves,
The function includes a term (α ₁ x ₁ + α ₂ x ₂ + α ₃ x ₃ + α ₄ x ₄ + α ₅ x ₅ ) or a term proportional to the term,
x _i is an expression of the i-th sine wave, α _i is a predetermined weighting coefficient (i is an integer of 1 to 5), and
The frequencies of f _{1 to} f ₅ that are the frequencies of the _first to fifth sine waves are expressed in units of Hz.
0.75 ≦ f ₁ ≦ 0.85,
0.64 ≦ f ₂ ≦ 0.72,
0.41 ≦ f ₃ ≦ 0.55,
0.25 ≦ f ₄ ≦ 0.35, and
0.16 ≦ f ₅ ≦ 0.24 is satisfied,
4. The light emission control device according to claim 3, wherein each of the weighting coefficients α ₄ and α ₅ is larger than each of the weighting coefficients α _{1 to} α ₃ . The weighting factors α _{1 to} α ₅ are:
The light emission control device according to claim 6, wherein α ₁ = α ₂ = α ₃ = 0.10 and α ₄ = α ₅ = 0.58 are satisfied. The light emission control unit
A first mode for changing the emission color so that the emission color includes green in the process of changing the emission color;
A second mode for changing the red color so that the emission color includes red in the process of changing the emission color; and
According to the input mode selection signal, any one of a plurality of modes including at least one of the third modes for changing the emission color so that the emission color includes purple in the process of changing the emission color is selected. The light emission control device according to claim 1, wherein the light emission color is changed in a selection mode. The light emission control unit
A first mode for changing the wavelength of the emission color within a range from 490 nm to 560 nm;
A second mode for changing the wavelength of the emission color within a range from 560 nm to 630 nm, and
According to an input mode selection signal, a selection mode is selected from among a plurality of modes including at least one of the third modes for changing the wavelength of the emission color within a range from 400 nm to 450 nm. The light emission control device according to any one of claims 1 to 7, wherein the light emission color is changed. The light emission control device according to any one of claims 1 to 9, wherein a human sensitivity under illumination by the light emitting unit is changed by light emission of the light emitting unit. A light emitting section with variable emission color;
An illumination device comprising: the light emission control device according to claim 1 that controls the light emitting unit. A lighting device according to claim 11;
A diffusing device with illumination, comprising: a diffusing unit that diffuses volatile substances.

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