KR20170123065A - Illumination sensor and illumination control device using the same - Google Patents

Abstract

The present invention relates to an illumination sensor, capable of detecting information about invisible illumination not recognized by the visible sense of a person but affecting a biorhythm, and controlling an illumination environment around a user in accordance with the detected information; and an illumination control device using the same. According to the present invention, the illumination sensor comprises: an illumination detection unit, which is an illumination sensor to measure a first illumination value as visible illumination information with respect to light and to measure a second illumination value as invisible illumination information affecting a biorhythm, to detect the first illumination value from incident light; a sensor storage unit to store a conversion coefficient value to convert the first illumination value into the second illumination value, and correlation information between the first and second illumination information; and an illumination calculation unit using the first illumination value, the conversion coefficient value, and the correlation information to calculate the second illumination value. Moreover, the illumination control device comprises: the illumination sensor installed in a portable terminal or a wearable device capable of being worn by a user; an illumination control unit using the second illumination value calculated in the illumination sensor to generate illumination control information to control the illumination of light outputted from a light source device; and an illumination operation unit adjusting the illumination of the light outputted from the light source device in accordance with the illumination control information generated by the illumination control unit to operate the light source device.

Description

TECHNICAL FIELD The present invention relates to an illuminance sensor and an illumination control device using the illuminance sensor.

The present invention relates to an illuminance sensor and an illuminance control apparatus using the illuminance sensor. More particularly, the present invention relates to an illuminance sensor that detects nonvisual illuminance information that can not be perceived by the human eye but affects a rhythm of a living body, And a roughness control device using the roughness sensor.

Recently, many bio- and medical-related research groups report that the spectral profile of the light emitted by artificial white light fits into the circadian rhythm of the body. The vital cycle rhythm is most sensitive in the vicinity of monochromatic blue light around 450 to 470 nm. This is because the blue light emitted from the artificial white light source suppresses melatonin. Here, melatonin is a biological compound having antioxidant and anticancer properties, and is known to be one of the important factors controlling the human rhythm. For example, if the amount of melatonin secretion increases, the biological clock is judged to be night, while if the amount of melatonin secretion decreases, the biological clock can be judged to be low.

On the other hand, recently, high efficiency white LED lamps, which are phosphor-injected based on blue LEDs, have been used in daily life. These high efficiency white LED lamps are based on blue LEDs and therefore contain more blue than natural light. Thus, when a user uses a high-efficiency white LED light to operate indoors at night, the amount of melatonin secretion does not increase in the human body due to exposure to blue light more than natural light, There is a problem that an abnormality occurs.

As an example to solve such a problem, a device capable of controlling the emission amount of blue light has been continuously studied. However, when the blue light emission amount of the illumination can not be controlled, it is difficult to use such a device, and the installation cost increases as the number of installed lights increases.

On the other hand, as an example of a technique for controlling illuminance of illumination according to a conventional living body circadian rhythm, there is an illumination system for protecting the cyclic neuroendocrine function according to Japanese Patent Laid-Open No. 10-2015-0138385. The patent is to increase the different spectral portions of conventional LEDs and provide white light that attenuates unwanted wavelength portions by a notch filter. That is, the patent provides light that is unfiltered at night and filtered light at night. Specifically, the patent discloses a technique of turning off a blue LED at night and increasing a spectrum of a purple LED chip to compensate for color in illumination using individual wavelength LED chips for purple, blue, green, yellow and red wavelengths .

However, the conventional technology as described above can only be applied to 'illumination', and it is difficult to apply it to other devices using an LED light source such as a smart phone, a television, and a monitor. In particular, there is a problem that the above-mentioned prior art does not reflect such characteristics because the biometric cycle rhythm is not only classified into day and night but also changes with time.

The object of the present invention is to provide an illuminance sensor capable of physically measuring non-visual illuminance information that affects a user's perineal cycle rhythm and a illuminance control apparatus using the illuminance sensor. have.

It is another object of the present invention to provide an illuminance sensor capable of controlling illumination according to a living body circadian rhythm by time of day without dividing the day into day and night, and an illuminance control apparatus using the same.

It is another object of the present invention to provide an illuminance sensor for adjusting a light source around a user and an illuminance control device using the illuminance sensor so as to optimize a user's visual perception rhythm of a living body, have.

It is another object of the present invention to provide an illuminance sensor which can be applied not only to illumination but also to a display device using an LED as a light source, and an illuminance control device using the same.

According to an aspect of the present invention, there is provided an illuminance sensor including a first illuminance value, which is visual illuminance information about light, and a second illuminance value, which is nonvisual illuminance information, (1) an illuminance detector for detecting a first illuminance value from the incident light, (2) a conversion factor value for converting the first illuminance value to a second illuminance value, and a second illuminance value, And (3) a second illuminance value calculating unit for calculating the second illuminance value using the first illuminance value, the transform coefficient value, and the correlation information.

Here, the value of the transform coefficient may be (1) a first count value indicating the action of the vital cycle rhythm, (2) a second count value indicating the efficacy of day cycle radiation, (3) And coefficient values.

In addition, the correlation information may include information on the following [first formula] or [second formula].

[First Formula]

(Second illuminance value) = (first illuminance value) X (first coefficient value)

[Second formula]

(Second illuminance value) = [(second count value) / (third count value)] X (first illuminance value)

On the other hand, the second coefficient value may be determined by the following [formula 3].

[Third formula]

(K _c : second coefficient value, K _{c, max} : maximum spectral one-cycle efficacy value, S (λ): radiant flux of the light source, C (λ)

Further, the third coefficient value may be determined by the following [formula 4].

[Formula 4]

(K: third coefficient, K _max : maximum spectral efficiency, S (λ): radiant flux of light source, V (λ): CIE spectral efficiency function)

The illuminance control device according to one embodiment of the present invention is provided with (1) the illuminance sensor according to any one of (1) to (5), (2) A light intensity control unit for generating light intensity control information for controlling the light intensity output from the light source device using the second light intensity value calculated by the light intensity control unit; And an illuminance driving unit for driving the illuminating unit.

In addition, the illuminance control apparatus according to an embodiment of the present invention may further include a control communication unit transmitting and receiving the illuminance control information generated from the illuminance control unit to and from the illuminance driving unit.

Meanwhile, the illuminance control unit generates illuminance control information for independently controlling the first illuminance value and the second illuminance value of the light output from the light source unit.

In particular, the illuminance control unit generates illuminance control information by using the conversion information, which is information on the correspondence between the second illuminance value and the melatonin suppression index value, and the second illuminance value calculated by the illuminance sensor, respectively.

Specifically, the illuminance control unit may include: (1) an illuminance storage unit storing a set value of the melatonin suppression index, which is a time-based set value of the conversion information and the value of the melatonin suppression index, (2) And calculating the calculated value of the melatonin inhibition index, which is the value of the melatonin inhibition index for the second illuminance value calculated by the illuminance sensor, using the conversion information stored in the illuminance storage unit, And comparing the set value of the inhibition index to extract the comparison value of the melatonin inhibition index and generating the intensity control information using the extracted comparison value of the melatonin inhibition index.

(2) a second illuminance value calculated by the illuminance sensor, and a second illuminance value stored in the illuminance storage unit; and (2) And a roughness analyzing unit for extracting the one-period roughness comparison value by comparing the stored one-day roughness set values and generating roughness control information using the extracted one-week roughness comparison value.

The illuminance control unit generates illuminance control information using the first illuminance value and the second illuminance value, wherein the illuminance control information includes at least one of (1) a visual illuminance setting value as a time- (2) a first illuminance value detected by the illuminance sensor and a visual illuminance setting value stored in the illuminance storage unit are compared with each other to extract a visual illuminance comparison value The second illuminance value calculated by the illuminance sensor is compared with the one-period illuminance illuminance value stored in the illuminance storage section to extract the illuminance illuminance comparison value, and illuminance control is performed using the extracted illuminance comparison value and illuminance illuminance comparison value And an illuminance analysis unit for generating information.

The illuminance sensor according to the present invention configured as described above and the illuminance control apparatus using the illuminance sensor provide the illuminance value obtained by measuring the nonvisual illuminance information affecting the living body circadian rhythm so that the user can easily manage the living organism rhythm at low cost There is an effect that can be done.

In addition, since the illuminance sensor of the present invention and the illuminance control apparatus using the illuminance sensor can provide control information for adjusting the non-visual illuminance value in real time, it is possible to control illumination according to the rhythm of a living body period per time zone.

In addition, since the illuminance sensor according to the present invention and the illuminance control apparatus using the illuminance sensor can provide control information independently controlling the visual illuminance value and the non-visual illuminance value of the light output from the light emitting device, It is possible to optimize both the visual illuminance and the color quality of light around the user.

In addition, the illuminance sensor and the illuminance control apparatus using the illuminance sensor according to the present invention can be applied not only to an illumination device but also to a display device using an LED as a light source, so that the illuminance of user's ambient light can be adjusted according to a rhythm of a living body period.

1 is a block diagram of a light intensity sensor 10 according to an embodiment of the present invention.
FIG. 2 is a block diagram of the illumination controller 20 according to an embodiment of the present invention. Referring to FIG.
3 is a diagram showing an example in which light is obtained in the illuminance sensor 10 according to an embodiment of the present invention.
FIG. 4 is a graph showing the correspondence between the second illuminance value and the Melatonin Suppression Value (MSV).
5 is a diagram showing an embodiment of a visual illuminance setting value (red color graph) and a one-cycle illuminance setting value (blue graph) required for each day of the day.
6 is a diagram summarizing the performance indexes related to visual performance, color quality and sucacadian performance of an artificial light source.
FIG. 7 is a graph showing the CIE spectral efficiency function (Gall et al.) And V (?): CIE spectral efficiency.
Figure 8 is a diagram showing relative visual performance and relative melatonin inhibition as a function of the visual illumination of the fluorescent and blue LEDs in the entire spectral range.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, . In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Furthermore, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the present invention. In this specification, the singular forms include plural forms as the case may be, unless the context clearly indicates otherwise. &Quot; comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements other than the stated element. Unless defined otherwise, all terms used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a block diagram of a light intensity sensor 10 according to an embodiment of the present invention.

The illuminance sensor 10 according to an embodiment of the present invention preferably includes an illuminance detector 11, a sensor storage 12, and an illuminance calculator 13, as shown in FIG.

The illuminance detecting unit 11 detects illuminance information on the light incident from the light source 1. At this time, the illuminance value output from the illuminance detector 11 is visual illuminance information (hereinafter, visual illuminance information on light is referred to as "first illuminance value") that can be directly sensed by the human eye. The illuminance detector 11 may be composed of various types of optical sensors known in the art.

The sensor storage unit 12 stores information necessary for calculating illuminance information corresponding to a rhythm of a living body cycle. At this time, the illuminance value outputted from the sensor storage unit 12 is nonvisual illuminance information which can not be directly sensed by the human eye, and illuminance information which influences the rhythm of the living body cycle (hereinafter, Quot; non-visual illumination information "is referred to as " second illumination value"). More specifically, the information stored in the sensor storage unit 12 includes a transform coefficient value and correlation information. The transform coefficient value is a coefficient value for transforming the first roughness value into the second roughness value, and the correlation information indicates information about a specific correlation between the first roughness value and the second roughness value.

The transform coefficient value may include at least one of a first coefficient value, a second coefficient value, and a third coefficient value. That is, the first coefficient value is a coefficient value for the circadian action factor (CAF) according to the kind of the light source 1, and the second coefficient value is the coefficient value for the circadian efficacy radiation: CER), respectively. Also, the third coefficient value represents a coefficient value for the luminous efficacy of radiation (LER). Correlation information and other detailed information stored in the storage unit 13 will be described later.

In particular, the correlation information may include information on Equation 1 or Equation 2 below.

[Formula 1]

Second illuminance value [blm / m ² ] = first illuminance value [blm / lm] X first coefficient value [lm / m ² ]

[Formula 2]

Blm / m ² = second coefficient value [blm] / third coefficient value [lm] X first illuminance value [lm / m ² ]

The square brackets ([]) in [Equation 1] and [Equation 2] represent the unit of the corresponding factor. The illuminance sensor 10 according to the embodiment of the present invention can finally obtain the second illuminance value using Equation 1 and Equation 2 above. The details of [Equation 1] and [Equation 2] will be described later.

The sensor storage unit 12 may store various conversion coefficient values according to various types of light sources, and may be provided with an input for selecting a light source type from a user.

The illuminance calculating unit 13 is configured to calculate the second illuminance value. That is, the roughness calculation unit 13 derives the second roughness value using the first roughness value detected by the roughness detection unit 11, the transform coefficient value stored in the sensor storage unit 12, and correlation information. At this time, the roughness calculation unit 13 can use the information on the above-described Equation 1 or Equation 2 as the correlation information.

Meanwhile, the illuminance sensor 10 according to an embodiment of the present invention may further include a sensor communication unit. At this time, the sensor communication unit externally transmits the second roughness value calculated by the roughness calculation unit 13, and can transmit and receive the first roughness value, the transform coefficient value, and the correlation information as needed. Accordingly, the second illuminance value, or the first illuminance value and the second illuminance value, derived from the illuminance sensor 10 according to the embodiment of the present invention, may be an illuminating device acting as a light source in the vicinity of the illuminance sensor 10, And can be used for a control device for controlling the illuminance of a device or the like.

The sensor communication unit may include a wired communication module, one or more wireless communication modules capable of wireless communication between the mobile communication terminal and the wireless communication system or a network in which the mobile communication terminals are located. For example, the sensor communication unit may include a mobile communication module, a Wi-Fi transmission / reception module, a Bluetooth transmission / reception module, a NFC (Near Field Communication) transmission / reception module, a BAN (Body Area Network) transmission / reception module, and other short-

2 shows a block diagram of a roughness control apparatus 20 according to an embodiment of the present invention.

FIG. 3 shows an example in which light is obtained in the light intensity sensor 10 according to an embodiment of the present invention.

The illuminance control device 20 according to an embodiment of the present invention includes an illuminance sensor 10, an illuminance control section 21, and an illuminance drive section 22 as shown in FIG. At this time, the illuminometer 10, the illuminance control unit 21, and the illuminance driving unit 22 may be provided integrally in one device or separately in a separate device.

The illuminance sensor 10 is an illuminance sensor for measuring a first illuminance value, which is visual illuminance information on light, and a second illuminance value, which is non-visual illuminance information, which affects a rhythm of a living body, . That is, as shown in FIG. 3, the illuminance sensor 10 detects a second illuminance value from all the light existing around the user, such as a natural light, a monitor, or a display of a mobile device, as well as the LED light source device, Value and the second illuminance value to the illumination controller 21. At this time, the illuminance sensor 10 is preferably provided in a portable terminal such as a wearable device such as a watch or band type wearable by a user, or a smart phone or a smart pad. This is to obtain the correct first and second illuminance values at the user's current position.

Particularly, as shown in Fig. 3, the illuminance sensor 10 is most preferably provided in a wearable device of the eyeglass type. This is because it is most accurate that the first and second illuminance values are derived based on the light incident on the user's eye.

The illuminance control section 21 is a configuration for generating illuminance control information for controlling light output from the light source device. The illuminance control information is information for controlling the illuminance of light output from the light source device around the user including the LED light source device. That is, the intensity control information may be information on the magnitude of the driving power provided for each of the plurality of monochromatic light sources in the light source apparatus. For example, the illumination control information may be information on driving power for adjusting the driving power provided to the red, green, and blue light sources to be large or small.

In particular, it is preferable that the illuminance control unit 21 independently adjusts the first and second illuminance values of the light emitted from the light source unit. For this purpose, the illuminance control unit 21 preferably generates illuminance control information including information for adjusting the first illuminance value of emitted light and information for adjusting the second illuminance value, respectively. For example, the illuminance control unit 21 may control the illuminance of the light emitted from the light source unit by adjusting the second illuminance value while keeping the first illuminance value constant, Or it may generate the intensity control information which causes the first and second illuminance values to be simultaneously adjusted and emitted.

As described above, the illuminance control unit 21 derives the illuminance control information including the information about the first illuminance value and the second illuminance value of the light emitted from the light source unit, The user 20 can adjust the rhythm of the user's daily cycle by independently controlling the visual illuminance sensed by the user and the nonvisual illuminance that the user can not sense. For example, the illuminance control unit 21 controls the light output from the light source unit to maintain the first illuminance value in the evening so as to minimize the second illuminance value while maintaining the visual brightness, It can induce the secretion of melatonin and maintain the rhythm of the user's daily cycle. As described above, the illuminance control device 20 according to the embodiment of the present invention can independently adjust the visual illuminance and the non-visual illuminance of the light output from the light source device, and not only the rhythm of the user's per diem cycle, There is a feature that can simultaneously optimize visual illumination and color quality.

The illuminance control unit 21 preferably derives illuminance control information using the second illuminance value calculated by the illuminance sensor 10. If necessary, the first illuminance value derived from the illuminance sensor 10, It is possible to derive the roughness control information by simultaneously using the second roughness value calculated by the roughness calculation unit 10. In particular, since the second illuminance value calculated by the illuminance sensor 10 is an illuminance value obtained by measuring non-visual illuminance information affecting the current user's perineal cycle rhythm, the illuminance control device 20 Can use the second illuminance value calculated by the illuminance sensor 10 to generate the illuminance control information so that it is possible to easily control the light source device for adjusting the rhythm of the user's living body cycle without any other complicated process And thus economical.

In particular, the illuminance control section 21 uses the conversion information, which is information on the correspondence between the second illuminance value and the melatonin suppression index value for light, and the second illuminance value calculated by the illuminance sensor 10, It is preferable to generate information. The process of using the value of the melatonin inhibition index to control the rhythm of the living organism of the user and the advantages thereof will be described in more detail below.

4 is a graph showing the correspondence between the second illumination value and the Melatonin Suppression Value (MSV).

The user's biometric cycle rhythm is determined by the secretion pattern of melatonin. That is, in order to maintain the rhythm of the user's daily cycle, the secretion pattern of the melatonin should be kept constant at the same time every day. On the other hand, the melatonin inhibition index is a standardized index indicating the degree of inhibition of human melatonin secretion in vivo, and exhibits a certain functional relationship with the second illuminance value, which is the nonvisual illuminance, as shown in Fig. The information on such a correspondence is the conversion information used by the illumination controller 21. [ This conversion information may be either conversion formula information having formula information between the second illuminance value and the melatonin inhibition index or a conversion value table consisting of values for the matching relationship between the second illuminance value and the value of the melatonin inhibition index . The value of the melatonin inhibition index is inversely proportional to the secretion amount of melatonin in vivo.

That is, the illumination controller 20 according to an exemplary embodiment of the present invention extracts the melatonin suppression index value affecting the current user through the second illuminance value calculated by the illuminance sensor 10, extracts the extracted melatonin suppression index The exponent value can be used to estimate the amount of melatonin secreted to the current user. In this case, since the amount of melatonin secretion in vivo is influenced by the second illuminance value of the light incident on the user, the amount of melatonin secreted by the current time user and the amount of melatonin secreted by the user at the current time In contrast, if the melatonin inhibition index value and the extracted melatonin inhibition index value, which are necessary to maintain the vital cycle rhythm, are compared, the second illuminance value of light to be incident on the current user can be determined. As described above, the illumination controller 20 according to the embodiment of the present invention only needs to use the melatonin suppression index value to generate the illumination control information, so that the user can adjust the rhythm of the living body cycle without any other complicated process. So that the control of the light source device can be performed more easily, which is economical.

Specifically, as shown in FIG. 2, the illumination controller 21 may include an illumination storage unit 23 and an illumination intensity analysis unit 24. The illumination intensity storage unit 23 may include a light source.

The illuminance storage unit 23 may store time-based setting values for the conversion information and the melatonin suppression index values, respectively. The set value of the melatonin inhibition index (hereinafter, referred to as "melatonin inhibition index setting value") for the melatonin inhibition index value is a value of the melatonin inhibition index to be possessed by the second illuminance value calculated by the illuminance sensor 10, Means the value of the melatonin suppression index of the light to be incident on the user from the light source device to the user in order to maintain the circadian rhythm.

In addition, the illumination storage unit 23 may store a time-based setting value for the second illuminance value. Here, the set value of the first illuminance value for each time period (hereinafter referred to as the "visual illuminance setting value") is a first illuminance value to be detected by the illuminance sensor 10 in each time period, Means a visual illuminance value of light to be incident on a user from a device to a user in a time zone.

In addition, the illumination storage unit 23 may store the set value of the first illumination value by time zone. In this case, the set value of the second illuminance value (hereinafter, referred to as "one-period illuminance set value") is a second illuminance value to be derived from the illuminance sensor 10 by time zone, Means the nonvisual illuminance value of light that should be incident on the user from time to time.

The roughness storage unit 23 may store the first roughness value detected by the roughness sensor 10 and the second roughness value calculated by the roughness sensor 10, respectively. The first illuminance value and the second illuminance value transmitted from the illuminance sensor 10 indicate the visual and non-visual illuminance information on the light incident on the current user. Therefore, the illuminance control device 20 according to the embodiment of the present invention compares the first illuminance value detected by the illuminance sensor 10 with the visual illuminance setting value, and also detects the second illuminance value calculated by the illuminance sensor 10 The illuminance control value and the daily illuminance setting value can be set to different values by day, week, month, and year, respectively.

The illuminance analyzing section 24 uses the second illuminance value calculated by the illuminance sensor 10 and the conversion information stored in the illuminance storage section 23 to calculate a melatonin suppression value for the second illuminance value calculated by the illuminance sensor 10 (Hereinafter, the melatonin inhibition index values thus derived are referred to as "melatonin inhibition index calculation values"). For example, if the second illuminance value calculated by the illuminance sensor 10 is 200 [blx] and the conversion information for 200 [blx] matches the melatonin suppression index value of 40 [%] 24) yields a calculated value of the melatonin inhibition index of 40 [%]. At this time, the calculated value of the melatonin inhibition index represents the value of the melatonin inhibition index for the light incident on the current visual intensity sensor 10.

Then, the illuminance analyzing unit 24 compares the calculated value of the calculated melatonin suppression index with the preset value of the melatonin suppression index stored in the roughness storage unit 23, and calculates the comparison value (hereinafter referred to as the calculated melatonin inhibition index value and the melatonin inhibition value Quot; melatonin suppression index comparison value ") is extracted from the comparison value of the index setting value. Then, the illuminance analyzing unit 24 generates illuminance control information using the extracted comparison value of the melatonin suppression index. In particular, the comparison value of the melatonin inhibition index may be a value corresponding to the difference between the calculated value of the melatonin inhibition index and the setting value of the melatonin inhibition index.

For example, when the extracted comparison value of the melatonin suppression index has a negative value, the illuminance analyzing unit 24 determines that the intensity of the illumination control information Lt; / RTI > On the other hand, when the extracted comparison value of the melatonin suppression index has a positive value, the illumination analyzer 24 generates illumination control information so that light having a second illumination intensity value smaller than the current illumination intensity is output from the light source device can do.

The illuminance analyzing section 24 compares the second illuminance value calculated by the illuminance sensor 10 with the one-period illuminance setting value stored in the illuminance storage section 23, And a comparison value of the calculated second illuminance value and the one-day illuminance setting value is referred to as "one-period illuminance comparison value"). At this time, the second illuminance value calculated by the illuminance sensor 10 represents the second illuminance value for the light incident on the current visual illuminance sensor 10. Thereafter, the illuminance analyzing unit 24 generates the illuminance control information using the extracted one-period illuminance comparison value. In particular, the one-period illuminance comparison value may be a value corresponding to a difference between the second illuminance value calculated by the illuminance sensor 10 and the one-period illuminance setting value.

For example, when the extracted one-period illuminance comparison value has a negative value, the illuminance analyzing unit 24 may calculate the illuminance control information such that light having the second illuminance value larger than the current value is output from the light source apparatus. Lt; / RTI > On the other hand, when the extracted one-cycle roughness difference value has a positive value, the roughness analyzing unit 24 generates the roughness control information so that the light having the second roughness value smaller than the current value is outputted from the light source device can do.

The illuminance analyzer 24 compares the first illuminance value detected by the illuminance sensor 10 with the visual illuminance set value stored in the illuminance storage 23 in addition to the one-period illuminance difference value, , And a comparison value between the first illuminance value and the visual illuminance setting value detected by the illuminance sensor 10 is referred to as "visual illuminance comparison value"). At this time, the first illuminance value detected by the illuminance sensor 10 represents the first illuminance value with respect to the light incident on the current visual illuminance sensor 10. Accordingly, the illuminance analyzing unit 24 generates the illuminance control information by using the above-described visual roughness difference value and the one-period illuminance difference value, respectively. In particular, the visual illuminance comparison value may be a value corresponding to a difference between the first illuminance value calculated by the illuminance sensor 10 and the visual illuminance setting value.

For example, when the extracted visual comparison value and the one-period illumination comparison value are each a negative value, the illuminance analysis unit 24 determines that the first illumination value and the second illumination value It is possible to generate the illumination control information such that light having a larger value is output. On the contrary, when the extracted visual comparison value and the one-period illumination comparison value each have a positive value, the illuminance analyzing section 24 determines that the first illuminance value and the second illuminance value are smaller The intensity control information can be generated so as to output the light having the wavelength?

If the extracted illumination intensity difference value is negative (-) and the extracted one-cycle illumination intensity difference value is positive (+), the illumination intensity analysis unit (24) It is possible to generate the illumination control information such that light having a larger value and a second illumination value having a value smaller than the current value is output. On the contrary, when the extracted visual intensity difference value has a positive value and the extracted one-period illuminance difference value has a negative value, the illuminance analyzing unit 24 obtains a first illuminance value from the light source device, The light intensity control information can be generated such that light having a smaller value and a second light intensity value having a value larger than the present value is output.

Hereinafter, one embodiment of the visual roughness difference value and the one-period roughness difference value will be described.

FIG. 5 shows an embodiment of a visual illuminance setting value (red color graph) and a one-cycle illuminance setting value (blue graph) required for each day of the day.

The range of the visual illuminance setting value and the one-day illuminance setting value required for each day of the day may be changed to mimic the variation of the illuminance by the natural sunlight, and in particular, the second illuminance value may be set low in the dark nighttime Provide a second illumination value similar to the actual natural environment.

Referring to FIG. 5, the visual illuminance setting value is maintained at 1000 [lx], which is a constant illuminance after 7 o'clock in the morning, and changes to 0 [lx] in the sleeping time at midnight. At this time, the daytime illuminance setting value gradually increases from 1000 [blx] at 10:00 am to about 2000 [blx] at 7:00 am and gradually decreases to 1000 [blx] or less after 6:00 pm , It maintains 100 [blx] or less from 10:00 pm to midnight, and changes to 0 [blx] at midnight that is sleeping time.

That is, it is possible not only to suppress the secretion of melatonin by 10 o'clock in the morning after the weather, but also to gradually increase the daily light intensity setting value to reduce the amount of melatonin generated during sleep, and then to increase melatonin By maintaining the daily light intensity setting value having the inhibition index, the secretion of melatonin can be suppressed.

In addition, after 6 o'clock, by gradually decreasing the daily light intensity setting value, the melatonin inhibition index is also decreased together with the daily light intensity setting value that causes the melatonin suppression index to converge to 0 from 2 hours before bedtime The amount of melatonin secretion can be increased to facilitate sleeping.

The illuminance information at the user's current position may change depending on the surrounding environment such as weather, work environment, illumination, and the like. If the illuminance information at the current position of the user, that is, the first illuminance value detected from the illuminance sensor 10 and the second illuminance value calculated from the illuminance sensor 10 correspond to the above-described visual illuminance setting value If the values of the visual comparison value and the one-period illumination comparison value are higher than the one-cycle illumination setting value, the illumination analysis unit 24 calculates the illuminance value of the illuminance And generates illumination control information so that light is output. That is, the illumination controller 20 according to an embodiment of the present invention adjusts the illuminance of light output to the light source device around the user regardless of the working environment, the surrounding environment such as illumination, Regardless of the factor, the rhythm of the biological circadian rhythm can be managed constantly.

On the other hand, the illuminance driving unit 22 is configured to control the illuminance of the light emitted from the user, including the LED light source unit, according to the illuminance control information generated by the illuminance control unit 21. In particular, if the roughness control information generated by the roughness controller 21 contains control information for the first roughness value and the second roughness value, the roughness driving unit 22 calculates the first roughness value of the light output from the light source device, It is desirable to adjust the illuminance value independently. In this case, the light source apparatus should be constructed such that the visual illuminance and the non-visual illuminance of the emitted light can be adjusted independently of each other. As an example of the light source device, there is an LED light source device, and the LED light source device will be described below.

The LED light source device may include a light source unit and a driving unit. The light source unit may include a plurality of monochromatic light sources that output different colors, and white light may be generated by mixing monochromatic light output from the plurality of monochromatic light sources. The driving unit provides driving power for each color to a plurality of monochromatic light sources. At this time, the magnitude of the provided driving power may be determined by the illumination control information generated by the illumination control unit 21. [ In addition, the driving unit may include a circuit for controlling the constant current and the constant voltage, in which the current and voltage provided for each color to the monochromatic light source are kept constant. At this time, the illumination controller 21 controls illumination of a plurality of monochromatic light sources of the white light source by color, and outputs illumination control information so that light is output by making stronger (more) or less (less) Can be generated.

As an example of the light source unit, there is a " multi-chip white LED device " disclosed in Korean Patent Application No. 10-2011-0083436 filed by the present inventors. Korean Patent Application No. 10-2011-0083436 discloses a multi-chip white LED device for outputting white light through a multi-color phosphor conversion LED having a long-wavelength pass filter coated thereon. Korean Patent Application No. 10-2011-0083436 is incorporated herein by reference.

Hereinafter, the light source unit will be described with reference to Korean Patent Application No. 10-2011-0083436.

The light source unit may be implemented as a multi-chip white LED device that emits white light through mixing of light emitted from a plurality of single-color LED chips. At this time, the plurality of monochromatic LED chips included in the LED light source device include: a) a red phosphor converted monochromatic LED, a green phosphor converted monochromatic LED, a blue LED; b) red LED, green phosphor conversion monochrome LED, blue LED; c) red phosphor conversion monochromatic LED, amber phosphor conversion monochromatic LED, green phosphor conversion monochromatic LED, blue LED; d) Red LED, Amber Phosphor Conversion Single Color LED, Green Phosphor Conversion Single Color LED, Blue LED; e) red phosphor conversion monochrome LED, yellow phosphor conversion monochrome LED, green phosphor conversion monochrome LED, blue LED; f) red LED, yellow phosphor conversion monochrome LED, green phosphor conversion monochrome LED, blue LED; g) yellow based phosphor conversion white LED, red phosphor conversion monochrome LED, amber phosphor conversion monochrome LED, green phosphor conversion monochrome LED or h) yellow based phosphor conversion white LED, red phosphor conversion monochrome LED, green phosphor conversion monochrome LED; As shown in FIG.

Also, all of the above combinations may include a green-based phosphor converted cyan LED.

The plurality of monochromatic LED chips may include a) a yellow phosphor converted single-color LED, a blue LED; b) green based phosphor conversion cyan LED, amber phosphor conversion monochrome LED or c) green based phosphor conversion cyan LED, red phosphor conversion monochrome LED; A combination of two chips.

Particularly, it is preferable that at least one of the plurality of monochromatic LED chips is a blue light source, and the light source unit may include a phosphor, a transmission filter, and the like. At this time, the phosphor is provided on the blue light source, and may be configured to absorb blue light emitted from the blue light source and emit light in the range of 500 to 700 nm. Further, the phosphor may be a yellow, amber, green or red phosphor. On the other hand, the transmission filter may be formed on the upper portion of the phosphor, and may be configured as a long wavelength filter to reflect blue light and transmit light in the range of 500 to 700 nm. At this time, the light in the range of 500 to 700 nm may be amber, yellow, green or red.

Specifically, the transmission filter may include a repeating layer in which a first thin film having a predetermined refractive index and a second thin film having a refractive index higher than that of the first thin film are alternately repeated. In this case, the uppermost layer and the lowermost layer of the repeating layer form a third thin film, and the thickness of at least one of the uppermost layer and the lowermost layer may be 1/80 to 1 / 4.4 of the optical thickness of the blue light source reflection band center wavelength have. The first thin film and the second thin film constituting the repeating layer between the uppermost layer and the lowermost layer may have an optical thickness of 1/3 to 1/5 of the center wavelength of the blue light source reflection band, May be a first thin film.

Further, the thickness of at least one of the thickness of the uppermost layer and the thickness of the lowermost layer may have an optical thickness of 1/7 to 1/9 of the blue light source reflection band center wavelength.

The illuminance control unit 21 may further include a control communication unit. In this case, the illuminance analysis unit 24 and the illuminance driving unit 22 may be provided in separate apparatuses, respectively. At this time, the control communication unit transmits and receives the illumination control information generated by the illumination analysis unit 24 to the illumination driving unit 22.

The control communication unit may include a wired communication module, one or more wireless communication modules capable of performing wireless communication between the mobile communication terminal and the wireless communication system or a network in which the mobile communication terminals are located. For example, the control communication unit may include a mobile communication module, a WiFi transmission / reception module, a Bluetooth transmission / reception module, a NFC (Near Field Communication) transmission / reception module, a BAN (Body Area Network) transmission / reception module, and other short-

The control communication unit can transmit and receive the second illuminance value calculated by the illuminance sensor 10 and the sensor communication unit provided in the illuminance sensor 10. The first illuminance value, the conversion coefficient value, and the correlation information And can transmit and receive.

Hereinafter, the research and experiment contents of the inventor of the present invention, which is the theoretical basis of the illuminance sensor and the illuminance control apparatus using the illuminance sensor according to an embodiment of the present invention, will be described in detail. A more clear understanding of the operation and effect of the present invention can be made through the following description. Hereinafter, the rhythm of a living body cycle is referred to as a "circadian ".

Traditionally, there were two conflicting publications examining the threshold of light for activating the circadian system. One report suggests that the typical office brightness level (x 500 lx) of a fluorescent lamp is ineffective in terms of melatonin suppression capability, while other publications may have a low light level (x 3.5 lx) . This directly contradictory result is due to the unrelated roughness measurement and measurement system and other measurement orientations. It can be expected that the visually ideal figure of merit and roughness values are quite different from those that have the greatest impact on the circadian system. A significant figure of merit related to the non-visual sequestration performance of artificial lighting as well as new units of illumination needs to be defined in order to measure the total sequestering beam impact on the surface per unit area. A non-visual description of how bright a radiative spectral copy is detected by the west eye system and how bright the non-visual light is emitted from the artificial lighting system (Circadian Efficacy of Radiation : CER) and Circadian Luminous Efficacy (CLE) are introduced in the present invention. Similar to the definition of roughness, the circadian illuminance can be defined as a value that quantifies how far incident light is wavelength-biased by the surface wave function C (λ) to correlate with the human circadian It is possible to measure precisely in non-visual terms by minimizing both the environmental differences (eg, the presence of distances, directions and reflective objects) and personal differences (eg, the physical structure of the nose and eyes) If so, the minimum circadian illuminance required to activate the surrogate can be determined by a series of medical or biological experiments that measure the simple cumulative amount of the circadian light flux reaching the retina. , The complete quantitative control of the accumulation of the blue light from the short wavelength region of white light and the artificial light source makes it possible to realize the potential of artificial light for human health and well- For this reason, the ability to control individual artificial lighting to optimize the performance index of the illumination in terms of visual performance and circadian effect, reducing the risk of the circadian attack, is the first step in a responsible debate It can be repeatedly mentioned that it is a very important factor.

Figure 6 summarizes all the possible and important performance indices relating to the sucrose performance as well as the visual performance and color quality of the artificial light source. A detailed description of the definition and necessity of all performance indices is included in the results and discussion section below. Until now, almost all types of artificial lighting including white LEDs have been developed to have excellent color quality and high visual performance such as correlated color temperature (CCT), color ductility scale (CRI), radiant luminous efficacy (LER) Lt; RTI ID = 0.0 > a < / RTI > limited number of performance indices. In Fig. 6, in the color, visual and print aspects, it is important that all performance indices achieve appropriate performance values.

In recent years, in an effort to improve LE and CRI in some desired CCTs and dynamically control color points in terms of visual performance and color quality, R _{B, M} A _{B, M} G _B, , Or R _{B, M} A _{B, M} G _{B and M} C _B 4-package white LEDs (R _{B, M} A _{B, M} G _{B and M} are connected by a blue LED with a long wavelength transmission dichroic filter (LPDF) (Pc-LED) that converts emitted light to monochrome red, amber, and green phosphors, B represents an InGaN blue LED, and C _B represents a partially blue-green phosphor converted blue LED. This 4-color white LED illumination can be considered as a good candidate for a good health lighting because color mixing among several pure-color LEDs can be easily implemented to evaluate the feasibility of a multi-package white LED as a light source of designed healthy white light.

Thus, the present invention shows all feasible feasibility indices required to optimize the circadian rhythm, visual performance and color quality of various RAGB 4-package white LEDs as well as commercial light sources and natural sunlight. There are also three blue LEDs (two blue LEDs and one partially converted cyan-blue LED), pc-LEDs with six green LPDFs, four amber-yellow LPDFs The optical performance of the RAGB 4-package white LED can be optimized by selecting the wavelength of each color LED from the covered pc-LED and the five red LPDF-encapsulated pc-LEDs. In addition, we discuss the suitability of the spectral power distribution of this tunable 4-package white LED by matching the spectral power distribution of daylight with the daylight and adjusting the steady-state illumination of the 4-package white LED. In order to achieve a healthy, efficient, natural, and adjustable 4-package white LED by comparing the color quality, visual performance and succadian performance characteristics of natural light, as well as the currently commercialized light sources, do.

The figure of merit for the West Cardinal and visual performance

In order to design new red, amber, green and blue (RAGB) 4-package white LED light sources for indoor and outdoor architectural lighting, the biological and behavioral endeavors for humans as well as the traditional values of architectural light sources must be considered. Thus, the traditional values associated with new LED lighting, such as color quality, visual comfort level, aesthetic appreciation of the lighting space, and optimization of energy conservation, are optimized for human health in terms of visual stimulation, physiological health, It should be promoted through a combination of consideration of the health value of the same lighting. As shown in Fig. 6, in order to increase the traditional and healthful performance of the new LED illumination type and to evaluate all the optical characteristics of the white artificial illumination including the four-package white LED lamp, visual performance and color quality, The definition and selection of an appropriate figure of merit for frozen performance need to be accounted for.

By analyzing the spectral power distribution of the white light, the circadian efficacy and luminous efficacy as a performance index for the circadian energy and visual energy efficacy for any type of light source of radiation (LER) values can be calculated and selected, respectively. As previously reported, CER can be defined as the ratio of the circadian flux to the radiant flux (S ( λ )).

[Formula 3]

In Equation 3, C ( ?) Is the circadian spectral efficiency function and has a peak at about 460 nm as already known, based on the data of the reaction spectrum for melatonin regulation (Fig. 2 Reference). K _{c, max} is the maximal spectral circadian efficacy value (= 683 blm / W) for a non-visual system. Thus, the CER is clearly defined as a parameter that describes how much the emitted spectrum exhibits invisible brightness when perceived by the average human eye's circadian system. In addition, the techniques already disclosed have proposed a cadmium lumen (cirlm) or a biolumen (blm) as a unit for quantifying the circadian fluence. Therefore, the proposed unit of CER and K _{c, max} is the stand Cadiz frozen lumen or bio lumen (cirlm / W or blm / W) per watt.

Generally, the LER is measured by a CIE photopic spectral luminous efficiency function (V (?) (See FIG. 7) and a luminous flux for the radiant flux (S (?)) ) ≪ / RTI >

[Formula 4]

As is well known, the LER, expressed in lumens per watt (lm / W), is a parameter that describes how much the radiated emission spectra exhibit visible brightness when perceived by the average human eye. K _max = 683 lm / W is the maximum value of spectral emission efficiency for photopic vision. As already reported, another performance index, Circadian Action Factor (CAF), is defined as the ratio of CER to LER. Briefly, this represents a biological effect per visual response unit. The CAF value can be used as an optimization tool for artificial illumination for human health.

[Formula 5]

CAF [blm / lm] = CER [blm / W] / LER [lm / W]

In order to evaluate the visual and non-visual performance of a real LED or illumination system, some figure of merit should be considered. An important figure of merit for the energy efficiency of real lighting is luminous efficacy measured in lumens per watt (lm / W). In addition, the external quantum efficiency (EQE, eta _e ) is defined as the ratio of the luminous efficacy ([ eta] _lm ) to the LER. _{Having the} same logical meaning, the circadian luminous efficacy ( eta _cirlm ) is defined as the product of CER and EQE of each illumination system.

[Formula 6]

? _e = ? _lm / LER

[Equation 7]

η _cirlm = CER x η _e

In the case of luminescent efficacy and sucrose luminescent efficacy, it is possible to evaluate alternative 4-packaged LED type lighting by determining the spectral distribution and intensity per watt and yielding the corresponding figure of merit.

In order to determine the minimum amount of white light from individual artificial lights to activate the non-visual system, it is important to measure the circadian illuminance of the illumination instead of relying on the visual illuminance value. Similar to the roughness measurement method, the circadian illuminance can be obtained by measuring the entire circardian luminous flux impinging on the surface per unit area. The only other concept when measuring the circadian illuminance from visual illumination is the CIE photopic spectral luminous efficiency function (V (?)) When calculating the steady- Instead, we use the circadian spectral efficiency function C (λ). In simple terms, the circadian illuminance can be defined as [Equation 8] and [Equation 9].

[Equation 8]

Cardiff standing frozen roughness value [blm / m ^2] = cardinality standing unloading action factor (CAF) [blm / lm] × visual roughness value [lm / m ^2]

[Equation 9]

(LER) [lm]} × visual illuminance value [lm / m ² ] [blm / m ² ] = {cercadene radiant efficacy value (CER) [blm] / radiant emission efficacy value

That is, [Equation 8] corresponds to [Equation 1], and [Equation 9] corresponds to [Equation 2]. Thus, the first illuminance value is a visual illuminance value, the second illuminance value is a sucrose illuminance value, the first count value is a sucrodane action coefficient, the second count value is a sucrose radiant efficacy value, Respectively correspond to the radiant efficiency values.

If you know the circadian effect coefficient and roughness of any type of illumination, you can calculate the circadian illuminance of the white light under certain conditions. In conclusion, it should be kept in mind that a high circadian action factor (CAF) and a high suc- cadinance value for a single artificial light can be obtained at the same illuminance (ie, brightness). In addition, the lamp spectrum, which can have a high circadian action factor (CAF), has the potential to concentrate energy in a sucrose-sensitive single spectral region, resulting in a strong impact on human health.

By introducing the figure of merit for the surveillance system, the surveillance illumination is enabled to determine the ability of the ramp to implement the surveillance system. Figure 8 shows the relative visual performance and relative melatonin suppression as a function of the visual illumination of the fluorescent and blue LEDs in the entire published spectral range. Both the fluorescence lamp in the entire spectral range and the melatonin suppression curve of the 470 nm blue LED are all located at different illumination levels (15-fold difference). As noted above, this figure shows that illumination is not a good indicator to determine the critical amount of light that stimulates a seacardian photobiological system. Thus, the circadian illuminance was introduced as a measure of how much the artificial light source affects the circadian photobiological system. With the CAF and illumination of any type of light, the circadian illuminance of the white light in Equation 1 can be calculated under certain conditions. 8, the calculated melatonin suppression curve is added as a function of the circadian illuminance from both the fluorescent lamp in the entire spectral range and the 470 nm blue LED. Based on the spectral power distribution of the light source, the Circadian Action Factors (CAF) of the fluorescent lamps and the 470 nm blue LEDs in the entire spectral range are assumed to be ~ 0.6 and ~ 7.17, respectively, in this calculation. As a result, the two melatonin inhibition curves, expressed as a function of the circadian illuminance, cover the middle area between the melatonin inhibition curves expressed as a function of visual acuity. Indicating that the threshold level of circadian illumination that activates melatonin inhibition has a similar value regardless of the type of lamp. In conclusion, if the threshold level for the circadian system is measured as the circadian illuminance, the health effects of individual lamps can be analyzed by the performance indices for the circadian system (CER, CLE and CAF). These results can solve the problem of large deviation of visual illumination threshold for melatonin suppression between different types of artificial lamps.

Figure 6 summarizes all the figure of merit of artificial lighting required when optimizing visual performance, sucacadian performance and color quality. Thus, discussion of the broader impact of a four-package white LED lighting system should tune the spectral power distribution of the lamp and all the figure of merit required in the lighting system.

Compared to the important role of daylight in activating the circadian and visual systems, the darkness of the night plays a different role in its impact on the circadian and visual system. In dark environments, especially when the CAF value of some artificial light sources is similar to that of sunlight, reduced visible light can lead to blindness of the visual sensory system, and reduced circadian light can promote melatonin secretion have. The darkness of the night can be considered to have a greater biological impact on the circadian system than the visual system. Therefore, proper characterization of the acceleration of the circadian light should be made before any harmful interference activates any potentially harmful health effects of exposure to indoor or outdoor lighting. If the minimum circadian illumination levels and exposure required to activate melatonin suppression under natural sunlight and at night are determined, these data will be used to develop artificial light sources for bright light treatment and health lighting purposes ≪ / RTI > Thus, all information relating to the spectral power distribution, the total light intensity, the CAF value of the sun, and the minimum stimulus of night darkness can be used to control the spectral power distribution and the intensity of the artificial light source, You can provide simple guidelines or minimal information to your lighting. Thus, proper exposure of artificial light to mimic daylight sunlight and control the blue area of light in the morning and at night is very important for a healthy human environment.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined by the scope of the following claims and equivalents thereof.

1: light source 10: illuminance sensor
11: illuminance detection unit 12: sensor storage unit
13: illumination calculation unit 20: illumination control device
21: illumination control unit 22: illuminance driving unit
23: illumination storage section 24: illuminance analysis section

Claims (12)

An illuminance sensor for measuring a first illuminance value, which is visual illuminance information about light, and a second illuminance value, which is nonvisual illuminance information that affects a living body circadian rhythm,
An illuminance detector for detecting a first illuminance value from incident light;
A sensor storage unit for storing correlation coefficient values for converting the first illumination intensity value to the second illumination intensity value, and correlation information between the first illumination intensity value and the second illumination intensity, respectively; And
A roughness calculation unit for calculating a second roughness value using the first roughness value, the transform coefficient value, and the correlation information;
And a light source. The method according to claim 1,
The conversion coefficient value may be expressed as:
A first coefficient value indicating an action of a vital cycle rhythm;
A second coefficient value indicative of the efficacy of day cycle radiation; And
A third coefficient indicating the efficacy of radiated light emission;
Wherein the light source is a light source. 3. The method of claim 2,
Wherein the correlation information includes information on a first equation or a second equation below.
[First Formula]
(Second illuminance value) = (first illuminance value) X (first coefficient value)
[Second formula]
(Second illuminance value) = [(second count value) / (third count value)] X (first illuminance value) 3. The method of claim 2,
Wherein the second coefficient value is determined by the following equation.
[expression]

(K _c : second coefficient value, K _{c, max} : maximum spectral one-cycle efficacy value, S (λ): radiant flux of the light source, C (λ) 3. The method of claim 2,
Wherein the third coefficient value is determined by the following equation.
[expression]

(K: third coefficient, K _max : maximum spectral efficiency, S (λ): radiant flux of light source, V (λ): CIE spectral efficiency function) The light sensor according to any one of claims 1 to 5, which is provided in a wearable device that can be worn by a portable terminal or a user.
An illuminance control unit for generating illuminance control information for controlling the illuminance of light output from the light source device using the second illuminance value calculated by the illuminance sensor; And
An illuminance driving unit for adjusting and illuminating the illuminance of light output from the light source according to the illuminance control information generated by the illuminance control unit;
And a controller for controlling the intensity of the light. The method according to claim 6,
Further comprising a control communication unit for transmitting and receiving the illumination control information generated by the illumination control unit to and from the illumination driving unit. The method according to claim 6,
The illumination control unit,
And generates illumination control information for independently controlling the first illumination intensity value and the second illumination intensity value of the light output from the light source device. The method according to claim 6,
The illumination control unit,
Wherein the illumination control information generating unit generates the illumination control information using the conversion information that is information on the correspondence between the second illuminance value and the melatonin suppression index value and the second illuminance value calculated by the illuminance sensor. 10. The method of claim 9,
The illumination control unit,
An illumination storage unit storing a set value of the melatonin suppression index, which is a time-based setting value for the conversion information and the melatonin inhibition index value, respectively; And
Using the second illuminance value calculated by the illuminance sensor and the conversion information stored in the illuminance storage unit, the calculated value of the melatonin inhibition index, which is the value of the melatonin inhibition index, with respect to the second illuminance value calculated by the illuminance sensor is derived, and the derived melatonin inhibition index Extracting the comparison value of the melatonin suppression index by comparing the calculated value with the set value of the melatonin suppression index stored in the illumination storage unit, and generating the illumination control information using the extracted comparison value of the melatonin suppression index;
And a controller for controlling the intensity of the light. The method according to claim 6,
The illumination control unit,
A roughness storage unit for storing a one-cycle roughness setting value that is a set value for a second roughness value by time period; And
The illuminance sensor is used to compare the second illuminance value calculated by the illuminance sensor with the one-period illuminance setting value stored in the illuminance storage unit and extract the one-period illuminance comparison value, and to generate the illuminance control information using the extracted one- part;
And a controller for controlling the intensity of the light. The method according to claim 6,
The illumination control unit,
The first roughness value and the second roughness value are used to generate the roughness control information,
A roughness storage unit storing a visual roughness setting value as a time-based setting value for the first roughness value and a one-period roughness setting value as a time-period setting value for the second roughness value, respectively; And
The second illuminance value calculated by the illuminance sensor and the one-period illuminance set value stored in the illuminance storage unit are compared with each other, and the first illuminance value detected by the illuminance sensor is compared with the visual illuminance set value stored in the illuminance storage unit, Extracts a one-period illuminance comparison value, and generates illuminance control information using the extracted comparison values of the visual illuminance and the one-period illuminance comparison value;
And a controller for controlling the intensity of the light.

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