JP3767149B2 - Lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an illuminating device, and more particularly to an illuminating device that is installed in a space where there is a change in outside light during the day and night, such as outdoors or in a shop.
[0002]
[Prior art]
Conventionally, there is an illuminating device that uses an illuminance sensor that detects ambient illuminance and turns off the light source when the ambient illuminance exceeds a lighting level from night to morning as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, in the case of such an illuminating device, as shown in FIG. 15, the light source is turned off once the ambient illuminance exceeds the lighting level, and then the ambient illuminance decreases due to the influence of clouds or the like and the lighting level decreases. If the value is less than, the light is re-lighted as shown in FIG. 15A, and there is a problem in that the illuminating device malfunctions and gives a strange feeling to surrounding people.
[0004]
The present invention has been made in view of the above problems, and an object thereof is to provide an illumination device capable of controlling a light source without malfunction when ambient illuminance increases.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, according to the invention of claim 1, further comprising an illuminance sensor for detecting an ambient irradiation degree, and a control unit for controlling the output of the light source in accordance with the detection result of the illuminance sensor, the control parts are intended to light up when below the lighting level turns off the light source when the ambient irradiation degree exceeds the lighting level, a certain time from the time exceeds a predetermined value ambient illumination level is set above the lighting level, the illuminance sensor der which prohibit the detection results input is, if the rate of change of the ambient illuminance is high longer the predetermined time, when the change rate of the ambient illumination is small and characterized to Rukoto shorten the predetermined time To do.
[0010]
According to the second aspect of the present invention, the fixed time is shorter than the daytime of the previous day.
[0011]
According to the invention described in claim 3 , the fixed time is set to 24- (length of night time on the previous day) + α (α is a constant) (Equation 1).
[0012]
According to the invention of claim 4 , when the ambient illuminance changes from dark to bright, the determination of the ambient illuminance starts from a level lower than the lighting level, and when the ambient illuminance changes from bright to dark The determination of the ambient illuminance is started from a level higher than the lighting level.
[0013]
Embodiment
(Embodiment 1)
FIG. 1 shows a block diagram of the first embodiment according to the present invention.
[0014]
In FIG. 1, 1 is an illuminance sensor, 3 is a control unit, 4 is a lighting fixture, 5 is a lighting device, and 6 is a light source.
[0015]
The illuminance sensor 1 is composed of CdS or a photodiode and its peripheral circuit, detects ambient illuminance, and notifies the control unit 3 of the detection level. The illuminance sensor 1 may be disposed in the same housing as the light source or may be disposed outside the housing. The control unit 3 is configured by a microcomputer or the like, and sends lighting information of the light source 6 to the lighting device 5 by information transmitted from the illuminance sensor 1 or the like. For example, the lighting device 5 performs phase control when the light source 6 is an incandescent lamp, and performs high-frequency operation when the light source 6 is a fluorescent lamp, as long as it has control means corresponding to the type of the light source 6. Good. The light source 6 may be anything depending on the application, and the number of lamps may not be limited to one.
[0016]
Next, the operation will be briefly described with reference to FIG. When the ambient illuminance exceeds the lighting level shown in FIG. 2, it is determined that it has become morning from night, and the light source 6 is turned off. Furthermore ambient illuminance is increased, at value slightly higher than the lighting level (hereinafter, referred to as illumination sensor input protection level.) When the value exceeds the, above and a predetermined time t1 (hereinafter, referred to as illumination sensor input prohibition time t1) only The input of the detection result of the illuminance sensor 1 from the illuminance sensor 1 to the control unit 3 is prohibited. By prohibiting the input of the detection result from the illuminance sensor 1, for example, even if the ambient illuminance falls below the lighting level due to the influence of clouds or the like, it does not relight as in the conventional example, Malfunctions can be prevented.
[0017]
Here, the means for prohibiting the input of the detection result from the illuminance sensor may be electrically or mechanically prohibited, or may be performed by a software process in the control unit 3. Any means can be used as long as it can prevent the problem. In order to simplify the control, the lighting level and the illuminance sensor input prohibition level shown in FIG. 2 may be the same.
[0018]
Furthermore, in this embodiment, the light source is turned on at night and turned off in the daytime. However, when switching on a plurality of lighting states (all lighting, dimming, blinking, etc.) at night lighting, For example, the lighting conditions may be arbitrarily set during the day and night, such as when all the lights are lit during the day and the surroundings are dark at night so that dimming is performed.
[0019]
Furthermore, as shown in FIG. 3, the illuminance sensor input prohibition time t1 is not required until the daytime ambient illuminance is maximized when the emphasis is on the correspondence of the ambient illuminance before and after dawn. However, it may be several tens of minutes to several hours after the illuminance sensor input prohibition level is exceeded. Further, as shown in FIG. 4, the illuminance sensor input prohibition time t1 is the entire period from when the ambient illuminance exceeds the illuminance sensor input prohibition level at dawn until the ambient illuminance falls below the illuminance sensor input prohibition level at sunset. It is good. In this case, however, the illuminance sensor input prohibition is canceled when it becomes dark due to some effect, for example, at around noon. Therefore, the input of the illuminance sensor is affected by the level until noon through a certain period (at least one year). First, the illuminance sensor input is prohibited, and the illuminance sensor input prohibition is canceled after noon, so that it can operate correctly in the evening without malfunction.
[0020]
(Embodiment 2)
Operation waveform diagrams of the second embodiment according to the present invention are shown in FIGS.
[0021]
In the present embodiment, a method for setting the illuminance sensor input inhibition time t1 in the first embodiment will be described.
[0022]
First, in FIGS. 5 and 6, the ambient illuminance level Lta after a lapse of a predetermined time ta after the ambient illuminance exceeds the lighting level is seen. When Lta = L1 in FIG. 5, Lta = L2 in FIG. 6, and L1 <L2, the illuminance level in the daytime is higher in the case of FIG. 6 than in the case of FIG. Therefore, the sunset time is also delayed, and as a result, the time from sunrise to sunset is expected to be longer. Therefore, when the illuminance level at ta is high, the illuminance sensor input inhibition time t1 is lengthened, and when the illuminance level at ta is low, the illuminance sensor input inhibition time t1 is shortened.
[0023]
In this way, by changing the illuminance sensor input prohibition time according to the ambient illuminance level, it is possible to provide a lighting device with fewer malfunctions due to daytime illuminance changes.
[0024]
(Embodiment 3)
Operation waveform diagrams of the third embodiment according to the present invention are shown in FIGS.
[0025]
In the present embodiment, another method for setting the illuminance sensor input inhibition time t1 in the first embodiment is shown. The difference from the second embodiment is that the ambient illuminance exceeds the lighting level. The illuminance sensor input prohibition time t1 is determined based on the change rate of the ambient illuminance after elapse of the predetermined time t2, and the same configuration as that of the other second embodiment is the same. The description will be omitted by attaching the reference numerals.
[0026]
In this embodiment, the change rate of the ambient illuminance at t2 is B1 in FIG. 7, B2 in FIG. 8, and if B2> B1, the illuminance in the case of FIG. It is thought that the rise is fast and the absolute value is high, and as a result, the time from sunrise to sunset is expected to be long. Therefore, when the change rate of the ambient illuminance at t2 is large, the illuminance sensor input inhibition time t1 is lengthened, and when the illuminance level at t2 is small, the illuminance sensor input inhibition time t1 is shortened. That is, B2 is made longer than B1.
[0027]
As described above, since the determination is made based on the change rate of the ambient illuminance at a certain time, there is an advantage that it is not influenced by the absolute value of the ambient illuminance at the time of determination.
[0028]
(Embodiment 4)
9 and 10 show operation waveform diagrams of the fourth embodiment according to the present invention.
[0029]
In the present embodiment, another method for setting the illuminance sensor input prohibition time t1 in the first embodiment is shown. The difference from the second embodiment is that the illuminance depends on the maximum value of the ambient illuminance. The sensor input prohibition time t1 is determined, and the same components as those of the second embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0030]
In the present embodiment, the maximum value of the ambient illuminance is M1 in FIG. 9, M2 in FIG. 10, and if M2> M1, the time from sunrise to sunset in the case of FIG. Expected to be long. Therefore, when the maximum value of ambient illuminance is large, the illuminance sensor input prohibition time t1 is lengthened, and when the maximum value of ambient illuminance is small, the illuminance sensor input prohibition time t1 is shortened. That is, M2 is made longer than M1.
[0031]
In this way, it is only necessary to look at the maximum value of the ambient illuminance, and there is an advantage that the control becomes simple.
[0032]
(Embodiment 5)
An operation waveform diagram of the fifth embodiment according to the present invention is shown in FIG.
[0033]
In this embodiment, another method for setting the illuminance sensor input prohibition time t1 in the first embodiment is shown. The difference from the second embodiment is the length of the daytime of the previous day. The illuminance sensor input prohibition time t1 of the next day is determined, and the same components as those of the second embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0034]
In other words, by measuring the daytime of the previous day and setting a time slightly shorter than the daytime of the previous day as the illuminance sensor input prohibition time t1 of the next day, malfunction occurs even if the daytime time changes due to seasonal fluctuations, etc. Can be controlled without.
[0035]
(Embodiment 6)
An operation waveform diagram of the sixth embodiment according to the present invention is shown in FIG.
[0036]
In this embodiment, another method of setting the illuminance sensor input prohibition time t1 in the first embodiment is shown. The difference from the second embodiment is the length of the night of the previous day. The illuminance sensor input prohibition time t1 of the next day is determined, and the same components as those of the second embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0037]
In other words, measure the night time tnight of the previous day,
Illuminance sensor input prohibition time t1 = 24−night + α (α: about several tens of minutes) (Equation 1)
By setting as, even if the daytime changes due to seasonal fluctuations, it can be controlled without malfunction.
[0038]
(Embodiment 7)
FIG. 13 shows an operation waveform diagram of the seventh embodiment according to the present invention.
[0039]
In the present embodiment, a light / dark determination time is provided in order to reliably detect a change when day and night are switched.
[0040]
In the case of performing light / dark determination, if the determination start is set to the lighting level L and a light / dark determination time is provided, when the determination is completed, it is already brighter or darker than the lighting level L. Therefore, in consideration of the change in the light / dark determination time, when changing from dark to light so that the light level becomes L when the determination is completed, a value L1 lower than the light level L is set by the change in the light / dark determination time. Set as the judgment start level. On the other hand, when changing from light to dark, a value L2 higher than the lighting level L is set as the determination start level by the amount changed by the light / dark determination time.
[0041]
By configuring in this way, it is possible to surely switch between light and dark near the lighting level. The light / dark determination time may be arbitrarily set according to the application (for example, several tens of seconds to several tens of minutes), and the value L1 and the value L2 may be arbitrarily set depending on the season / installation location / light / dark determination time.
[0042]
【The invention's effect】
According to the first aspect of the present invention, when the ambient illuminance rises from night to morning, and the ambient illuminance rises, it is re-lighted even if the ambient illuminance falls below the lighting level due to the influence of clouds and the like. In addition to controlling the light source without malfunction, it is possible to provide an illuminating device that can determine the illuminance sensor input inhibition time without being influenced by the absolute value of the ambient illuminance .
[0046]
According to the second and third aspects of the invention, in addition to the effect of the first aspect of the invention, the light source can be controlled without malfunction even when the daytime changes due to seasonal fluctuations. Equipment can be provided.
[0047]
According to the invention described in claim 4 , in addition to the effect of the invention described in claim 1, it is possible to provide an illuminating device capable of switching light and dark in the vicinity of the lighting level.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment according to the present invention.
FIG. 2 is an operation waveform diagram according to the embodiment.
FIG. 3 is another operation waveform diagram according to the embodiment.
FIG. 4 is another operation waveform diagram according to the embodiment.
FIG. 5 shows an operation waveform diagram of the second embodiment according to the present invention.
FIG. 6 is another operation waveform diagram according to the embodiment.
FIG. 7 shows an operation waveform diagram of the third embodiment according to the present invention.
FIG. 8 is another operation waveform diagram according to the embodiment.
FIG. 9 shows an operation waveform diagram of the fourth embodiment according to the present invention.
FIG. 10 is another operation waveform diagram according to the embodiment.
FIG. 11 shows an operation waveform diagram of the fifth embodiment according to the present invention.
FIG. 12 shows an operation waveform diagram of the sixth embodiment according to the present invention.
FIG. 13 shows an operation waveform diagram according to the seventh embodiment of the present invention.
FIG. 14 shows an operation waveform diagram of a conventional example according to the present invention.
FIG. 15 shows another operation waveform diagram of a conventional example according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Illuminance sensor 3 Control part 6 Light source t1 Illuminance sensor input prohibition time

Claims (4)

An illuminance sensor for detecting an ambient irradiation degree, in the illumination device and a control unit for controlling the output of the light source in accordance with a detection result of the illuminance sensor,
Wherein the control unit is for the peripheral irradiation degree is turned and turns off the light source and above the lighting level falls below the lighting level, exceeds a predetermined value said peripheral irradiation degree is set to at least the lighting level predetermined time from when the all SANYO prohibiting input of the detection result of the illuminance sensor, if the rate of change of the ambient illuminance is high longer the predetermined time, if the rate of change of the ambient illuminance is small the predetermined time lighting device according to claim the short to Rukoto. The lighting device according to claim 1, wherein the predetermined time is shorter than the length of daytime of the previous day. The predetermined time is
24- (length of night time on the previous day) + α (α is a constant) (Equation 1)
The lighting device according to claim 1, wherein The lighting device according to claim 1. When the ambient illuminance changes from dark to bright, the determination of the ambient illuminance starts from a level lower than the lighting level, and when the ambient illuminance changes from bright to dark, The lighting device according to claim 1, wherein the determination of the ambient illuminance is started from a high level.

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