JP2004303582A - Lighting control device and luminaire equipped with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting control device and a luminaire equipped with it capable of controlling light inside a room to the same illuminance and securing a comfortable lighting space independently of a daytime and nighttime. <P>SOLUTION: The lighting control device is equipped with light receiving elements 9, 10; an illuminance sensor 3 measuring illuminance in a lighting space by the light receiving elements 9, 10; and a controller 2 extracting a component in a visible light region by calculating outputs of the light receiving elements 9, 10 and controlling the irradiation of the luminaire 4 based on the extracted result so that the lighting space has previously set illuminance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an illumination control device that performs dimming control of a lighting fixture so that a room has a predetermined illuminance using natural light, and a lighting fixture including the same.
[0002]
[Prior art]
The conventional artificial illumination control device is provided with an all-daylight illuminance detection means and a skylight illuminance detection means outdoors for determining the weather, the presence or absence of direct light is determined by the calculation means, and the indoor daylight illuminance detection means Detecting daylight illuminance, referring to the presence or absence of direct light, set the illuminance lower than when there is no direct light, and conversely, set the illuminance higher when there is no direct light, and there is direct light If the indoor daylight illuminance exceeds the set illuminance, the signal is turned off or dimmed, and if there is no direct light and the indoor daylight illuminance exceeds the set illuminance, the light is automatically turned off or dimmed. By providing a control device that controls the lighting and illumination, the room illuminance is automatically adjusted (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Publication No.2-4117 (page 1-2, FIG. 1)
[0004]
[Problems to be solved by the invention]
The conventional artificial illumination control device (illumination control device) as described above automatically adjusts the room illuminance depending on the presence or absence of direct light. However, the light perceived by human eyes is visible light having a wavelength in the range of 400 nm to 700 nm with a peak at 550 nm. Daylight detected by the indoor daylight illuminance detection means, that is, natural light, is not only visible light. However, since there is no direct light at night, there is not much problem with automatic adjustment of room illuminance at nighttime, because it contains ultraviolet rays with shorter wavelengths than visible rays and infrared rays with longer wavelengths than visible rays. Dimming including visible light that does not need to be adjusted, it may be too bright or too dark depending on the location of the luminaire. In addition, the automatic adjustment of the room illuminance adjusts the light including the high illuminance light even when spotted high illuminance light is included in a part of the area detected by the indoor daylight illuminance detection means. There was also a problem that the optimal adjustment was not made, such as squeezing and darkening the artificial light of the lighting fixture considerably. Furthermore, since the conventional artificial illumination control device is provided with illuminance detection means also outdoors, the illuminance detection means must be provided with, for example, a waterproof measure, and there is a problem that the structure is complicated and expensive. there were.
[0005]
The present invention has been made in order to solve the above-described problems. An illumination control device capable of realizing a comfortable illumination space by dimming a room to the same illuminance regardless of daytime or nighttime, and the like. An object of the present invention is to provide a lighting apparatus provided with the same.
[0006]
[Means for Solving the Problems]
The illumination control device according to the present invention includes a light receiving element, and an illuminance sensor that measures the illuminance of the illumination space by the light receiving element, calculates an output of the light receiving element, extracts a component in the visible light region, and based on the extraction result And a controller for controlling the illumination of the luminaire so that the illumination space has a predetermined illuminance set in advance.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention, and FIG. 2 is an explanatory diagram of the first embodiment of the present invention. In the figure, an illumination control device 1 installed on a ceiling or the like in the room includes a controller 2 and an illuminance sensor 3, and the controller 2 measures a value from the illuminance sensor 3 that measures the illuminance of the indoor illumination space 5. Based on the (sensor signal), for example, a fluorescent lamp installed on the indoor ceiling or the like so that the illuminance of the illumination space 5 (which may be the desk surface 5a) becomes a predetermined illuminance (for example, 700 lux) set in advance. A dimming signal for dimming the artificial light 4a emitted from the lighting fixture 4 having the above is sent to the lighting fixture 4 to perform dimming control.
[0008]
The illuminance sensor 3 includes photodiodes 9 and 10, which are light receiving elements having different spectral sensitivity characteristics. The photodiodes 9 and 10 are placed indoors through artificial light 4 a of the lighting fixture 4 and the window 7 of the sun 6. The reflected light 8 reflected from the floor surface of the incident natural light (also referred to as daylight) 6a or the desk top surface 5a is received corresponding to each spectral sensitivity characteristic, and each received light (measured value) is an electric signal. And output to the controller 2 as a sensor signal.
As shown in FIG. 3, the photodiodes 9 and 10 have spectral sensitivity characteristics a and b, respectively. The photodiode 9 having the spectral sensitivity characteristic a has a wavelength of 320 to 1000 nm, that is, visible light to infrared light. The region 10 can receive the reflected light 8 including both the artificial light 4a and the natural light 6a, and the photodiode 10 having the spectral sensitivity characteristic b can receive the light having a wavelength of 800 to 1100 nm, that is, the infrared region, and the natural light. The reflected light 8 of 6a is received.
[0009]
The controller 2 adjusts the control device 11 having the calculation unit 12, the storage unit 13 storing a predetermined illuminance level set in advance (for example, a level corresponding to 700 lux), and the control signal from the control device 11. A light control signal output unit 14 that converts the light signal into a light fixture 4 and outputs the light signal to the lighting fixture 4.
The calculation unit 12 calculates based on the sensor signals (outputs) of the photodiodes 9 and 10 of the illuminance sensor 3 and extracts components in the visible light region, and outputs them to the dimming signal output unit 14 based on the extraction result. Calculate the control signal. Further, based on each sensor signal (output) of the photodiodes 9 and 10, it is determined whether the illumination space 5 is daytime or nighttime, and the control signal is output to the dimming signal output unit 14 based on the determination result. And the control signal is calculated based on the calculation method.
[0010]
When dimming a room with a predetermined illuminance using the illumination control device 1 configured as described above, first, the photodiodes 9 and 10 of the illuminance sensor 3 of the illumination control device 1 are used for the indoor floor surface, the desk surface 5a, and the like. The reflected light 8 reflected at is received in correspondence with the respective spectral sensitivity characteristics a and b, and is output to the controller 2 of the illumination control apparatus 1 as a sensor signal. Next, based on the sensor signals (outputs) of the photodiodes 9 and 10 from the illuminance sensor 3, the calculation unit 12 of the controller 11 of the controller 2 converts the sensor signals (outputs) of the photodiodes 10 into those of the photodiodes 9. The percentage of the sensor signal (output) is calculated, and the calculated ratio is subtracted from the sensor signal (output) of the photodiode 9 to extract the visible light region component from the reflected light 8. .
[0011]
Next, the calculation unit 12 compares the illuminance level corresponding to the extracted component of the visible light region with the predetermined illuminance level stored in the storage unit 13, and the illuminance level of the extracted component of the visible light region is the predetermined illuminance. When it is higher than the level, the lighting fixture 4 is too bright, so the control signal level for the lighting fixture 4 is lowered. When the illuminance level of the extracted visible light region component is lower than the predetermined illuminance level, the lighting fixture 4 is dark. Since it is too much, the control signal level for the luminaire 4 is raised. Next, the control signal whose level is raised or lowered is output from the control device 11 to the dimming signal output unit 14, and the dimming signal output unit 14 converts the dimming signal into a dimming signal and outputs it to the lighting fixture 4. And the lighting fixture 4 irradiates the artificial light 4a based on a light control signal.
[0012]
When the photodiodes 9 and 10 of the illuminance sensor 3 receive the reflected light 8 in the room corresponding to the respective spectral sensitivity characteristics a and b, the calculation unit 12 determines whether the illumination space 5 is daytime or nighttime. Is judged. For example, when the sensor signal (output) of the photodiode 10 is “0”, it can be seen that the reflected light 8 does not include the natural light 6a, and the natural light 6a is not incident on the room at night. Is determined. When the sensor signal (output) of the photodiode 10 exceeds “0”, it can be seen that the reflected light 8 includes the natural light 6a, and the natural light 6a is incident on the room during the day. judge.
[0013]
When the determination result is nighttime, since the reflected light 8 is substantially the artificial light 4a of the lighting fixture 4, the calculation unit 12 determines the predetermined illuminance level stored in the storage means 13 and the sensor signal ( When the illuminance level of the photodiode 9 is larger than the predetermined illuminance level, the luminaire 4 is too bright, so the control signal level for the luminaire 4 is lowered, and the photodiode 9 When the illuminance level is lower than the predetermined illuminance level, since the lighting fixture 4 is too dark, the control signal level for the lighting fixture 4 is increased. Next, the control signal whose level is raised or lowered is output from the control device 11 to the dimming signal output unit 14, and the dimming signal output unit 14 converts the dimming signal into a dimming signal and outputs it to the lighting fixture 4. And the lighting fixture 4 irradiates the artificial light 4a based on a light control signal.
[0014]
When the determination result is daytime, the reflected light 8 is both the artificial light 4a of the luminaire 4 and the natural light 6a of the sun 6. Therefore, the calculation unit 12 outputs the sensor signals (outputs) of the photodiodes 9 and 10. ), The component of the visible light region is extracted from the reflected light 8 as described above, and the illuminance level corresponding to the extracted component of the visible light region is compared with the predetermined illuminance level stored in the storage means 13. The control signal level for the luminaire 4 is controlled in the same manner as at night, and a control signal is output from the control device 11 to the dimming signal output unit 14 and converted into a dimming signal by the dimming signal output unit 14. , Output to the luminaire 4. And the lighting fixture 4 irradiates the artificial light 4a based on a light control signal.
[0015]
As described above, since the two photodiodes 9 and 10 having different spectral sensitivity characteristics are provided in the illuminance sensor 3, the component in the visible light region can be reliably extracted from the reflected light 8 from the room. Thereby, the indoor illumination space 5 can be dimmed to a predetermined illuminance level. In addition, the two photodiodes 9 and 10 having different spectral sensitivity characteristics can determine whether the reflected light 8 is daytime composed of artificial light 4a and natural light 6a or nighttime composed of only artificial light 4a. Thereby, the light control of the lighting fixture 4 corresponding to daytime or nighttime can be performed.
Therefore, a comfortable lighting space can be realized by dimming the room to the same illuminance in daytime and nighttime, changes in the amount of infrared rays and ultraviolet rays due to differences in time zones, or differences in seasons.
[0016]
In the first embodiment, the illuminance sensor 3 is provided with two photodiodes 9 and 10 having different spectral sensitivity characteristics. For example, a photodiode having a spectral sensitivity characteristic capable of receiving an ultraviolet region is used. In addition, a plurality of photodiodes having different spectral sensitivity characteristics may be provided so that components in the visible light region can be extracted more accurately. One photodiode may have two or more spectral sensitivity characteristics. These cases also have the same effect.
[0017]
Embodiment 2. FIG.
4A and 4B are a plan view and a cross-sectional view in which a part of the main part is omitted when viewed from below when installed on the ceiling according to the second embodiment of the present invention. In the second embodiment, in the illumination control device 1 according to the first embodiment, the photodiode 10 of the illuminance sensor 3 provided therein is omitted, and the window portion 1a of the illumination control device 1 facing the illuminance sensor 3 is omitted. And an illuminance sensor 3, and an optical filter 15 is provided so as to cover the light receiving part side (lower part when viewed from below) of the illuminance sensor 3, and the optical filter 15 covers and covers the photodiode 9. The spectral sensitivity characteristics of the photodiodes 9 are different from each other. In the second embodiment, when the photodiode 9 is not covered with the optical filter 15, the photodiode 9 has the spectral sensitivity characteristic a. When the photodiode 9 is covered with the optical filter 15, the spectral sensitivity characteristic a Therefore, the photodiode 9 has a spectral sensitivity characteristic c as shown in FIG.
[0018]
The optical filter 15 is slidably disposed by a pair of guide rails 16 and 16 that guide opposite sides of the optical filter 15, and a drive control unit 17 provided in the controller 2 allows the guide rails 16 and 16. A signal is output to the electrostatic motor 18 provided on one side, and the optical filter 15 is electrostatically driven to slide.
[0019]
When dimming the room to a predetermined illuminance using the illumination control device 1 configured as described above, the optical filter 15 is not positioned above the illuminance sensor 3 as an initial state (one point in FIG. 4A). Therefore, the indoor reflected light 8 is received corresponding to the spectral sensitivity characteristic a by the photodiode 9 of the illuminance sensor 3 without the optical filter 15 and output to the controller 2 as a sensor signal. . Next, the control device 11 of the controller 2 electrostatically drives the optical filter 15 via the drive control unit 17 and the electrostatic motor 18, and slides the optical filter 15 on the illuminance sensor 3. Then, the indoor reflected light 8 is received by the photodiode 9 in the state where the optical filter 15 is provided via the optical filter 15 in correspondence with the spectral sensitivity characteristic c, and is output to the controller 2 as a sensor signal.
[0020]
Next, the calculation unit 12 of the controller 2 outputs the sensor signal (output) of the photodiode 9 when there is no optical filter 15 from the illuminance sensor 3 and the sensor signal (output) of the photodiode 9 when there is the optical filter 15. Based on the above, the components in the visible light region are extracted from the reflected light 8 as in the case described in the first embodiment. Based on the illuminance level corresponding to the extracted component of the visible light region and the predetermined illuminance level stored in the storage unit 13, a control signal is output from the control device 11 to the dimming signal output unit 14, and the dimming signal is output. The output unit 14 converts the light into a dimming signal and outputs it to the luminaire 4. And the lighting fixture 4 irradiates the artificial light 4a based on a light control signal. It is determined whether the illumination space 5 is currently daytime or nighttime, a dimming signal corresponding to daytime or nighttime is output to the lighting fixture 4, and the artificial light 4a of the lighting fixture 4 is dimmed to adjust the daytime and The nighttime room may have the same illuminance.
[0021]
As described above, the optical filter 15 for changing the spectral sensitivity characteristic a of the photodiode 9 to the spectral sensitivity characteristic c is provided on the light receiving portion side of the illuminance sensor 3 including the photodiode 9. The components in the visible light region are reliably extracted, so the room is dimmed with the same illuminance for daytime and nighttime, changes in the amount of infrared and ultraviolet rays due to differences in time zones, or differences in seasons. A space can be realized. In addition, since the sliding of the optical filter 15 is performed by electrostatic driving, the power consumption is low and the reliability is improved because the optical filter 15 is hardly deteriorated.
[0022]
In the second embodiment described above, the optical filter 15 is provided for the photodiode 9 having the spectral sensitivity characteristic a. However, as shown in FIG. The optical filter 15 having the sensitivity characteristic a (or b) may be provided, and the illuminance sensor 3 is provided with a normal photodiode capable of receiving light from the visible light region to the near infrared region, and the optical filter 15 is provided for this photodiode. May be provided. These cases also have the same effect.
In addition, the case where the optical filter 15 is present or absent on the illuminance sensor 3 by sliding the optical filter 15 has been shown. However, the optical filter 15 is rotated to rotate the optical filter 15 so that the optical filter 15 is present on the illuminance sensor 3 or not. You may make it become none. In this case, the same effect is obtained.
[0023]
Embodiment 3 FIG.
FIG. 5 is a plan view and a cross-sectional view in which a part of the main part is omitted when viewed from below when installed on the ceiling according to the third embodiment of the present invention. In the third embodiment, in the illumination control apparatus 1 according to the second embodiment, the liquid crystal panel 19 that changes the spectral sensitivity characteristic of the photodiode 9 provided in the illuminance sensor 3 in place of the optical filter 15 is replaced with the illuminance sensor 3 and the window. It is provided so as to cover the light receiving unit side of the illuminance sensor 3 (lower portion when viewed from below) with the unit 1a.
The pair of guide rails 16, 16, the drive control unit 17, and the electrostatic motor 18 according to the second embodiment are omitted, and the liquid crystal panel 19 is electrically turned on / off by the liquid crystal control unit 20 provided in the controller 2. It is turned off to change the transmittance due to the difference in light wavelength, and the spectral sensitivity characteristic of the photodiode 9 is changed to a or c by changing the transmittance.
[0024]
When the interior of the room is dimmed to a predetermined illuminance using the illumination control device 1 configured as described above, the liquid crystal panel 19 is in an electrically off state (indicated by a one-dot chain line in FIG. 5A) as an initial state. Therefore, the reflected light 8 in the room is received corresponding to the spectral sensitivity characteristic a by the photodiode 9 of the illuminance sensor 3 whose spectral sensitivity characteristic is not changed, and is output to the controller 2 as a sensor signal. Next, the control device 11 of the controller 2 electrically turns on the liquid crystal panel 19 via the liquid crystal control unit 20, and reflects the reflected light 8 in the room by the photodiode 9 whose spectral sensitivity characteristic is changed from a to c. Light is received corresponding to the spectral sensitivity characteristic c and output to the controller 2 as a sensor signal.
[0025]
Next, the calculation unit 12 of the controller 2 uses the sensor signal (output) of the photodiode 9 when the spectral sensitivity characteristic is not changed by the liquid crystal panel 19 from the illuminance sensor 3, that is, the spectral sensitivity characteristic is a, and the liquid crystal Similar to the case described in the first embodiment, based on the sensor signal (output) of the photodiode 9 when the spectral sensitivity characteristic is changed by the panel 19, that is, when the spectral sensitivity characteristic is c, the reflected light 8 Extract components in the visible light region. Based on the illuminance level corresponding to the extracted component of the visible light region and the predetermined illuminance level stored in the storage unit 13, a control signal is output from the control device 11 to the dimming signal output unit 14, and the dimming signal is output. The output unit 14 converts the light into a dimming signal and outputs it to the luminaire 4. And the lighting fixture 4 irradiates the artificial light 4a based on a light control signal. It is determined whether the lighting space 5 is daytime or nighttime, a dimming signal corresponding to daytime or nighttime is output to the lighting fixture 4, and the artificial light 4a of the lighting fixture 4 is dimmed to adjust the daytime and nighttime. You may make it make the indoor of the same illumination intensity.
[0026]
As described above, the liquid crystal panel 19 for changing the spectral sensitivity characteristic of the photodiode 9 to a or c is provided on the light receiving portion side of the illuminance sensor 3 including the photodiode 9, and the photodiode having the spectral sensitivity characteristic changed by the liquid crystal panel 19 is provided. 9, the reflected light 8 is received and the components in the visible light region of the reflected light 8 are surely extracted, so that in the daytime and nighttime, the change in the amount of infrared and ultraviolet rays due to the difference in time zone, or the difference in season A comfortable lighting space can be realized by dimming the room to the same illuminance. In addition, since the spectral sensitivity characteristic of the photodiode 9 can be easily changed to a or c simply by electrically turning on / off the liquid crystal panel 19 to change the transmittance, the illumination is comfortable with a simple structure. A space can be realized.
[0027]
In the above-described third embodiment, the illuminance sensor 3 is provided with the photodiode 9 having the spectral sensitivity characteristic a. However, as shown in FIG. 19, the spectral sensitivity characteristic may be changed to a or b, and the illuminance sensor 3 is provided with a normal photodiode capable of receiving light from the visible light region to the near-infrared region. The spectral sensitivity characteristic may be changed. These cases also have the same effect.
[0028]
In the above-described first to third embodiments, the lighting control device 1 includes the controller 2 and the illuminance sensor 3 and is configured separately from the lighting fixture 4. However, the lighting control device 1 is provided as the lighting fixture 4. And may be formed integrally. In this case, the same effect is obtained.
[0029]
【The invention's effect】
As described above, the present invention has a light receiving element, an illuminance sensor that measures the illuminance of the illumination space by the light receiving element, and calculates the output of the light receiving element to extract a component in the visible light region, and based on the extraction result And a controller that controls the illumination of the luminaire so that the illumination space has a predetermined illuminance, so that the components of the visible light region can be reliably extracted from the reflected light from the illumination space, A comfortable lighting space can be realized by dimming the room to the same illuminance in daytime and nighttime, changes in the amount of infrared rays and ultraviolet rays due to differences in time zones, or differences in seasons.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.
FIG. 2 is an explanatory diagram of Embodiment 1 of the present invention.
FIG. 3 is a diagram showing spectral sensitivity characteristics of the photodiode according to the first embodiment of the present invention.
FIGS. 4A and 4B are a plan view and a cross-sectional view, partly omitted, of a main part viewed from below when installed on a ceiling according to a second embodiment of the present invention. FIGS.
FIGS. 5A and 5B are a plan view and a cross-sectional view, partly omitted, of a main part viewed from below when installed on a ceiling according to a third embodiment of the present invention. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Illumination control apparatus, 2 controller, 3 illumination intensity sensor, 4 illumination fixture, 5 illumination space, 9,10 photodiode, 11 control apparatus, 12 calculating part, 15 optical filter, 19 liquid crystal panel, a, b, c, d spectroscopy Sensitivity characteristics.

Claims (7)

An illuminance sensor having a light receiving element and measuring the illuminance of the illumination space by the light receiving element;
A controller that calculates the output of the light receiving element to extract a component in the visible light region, and controls irradiation of the lighting fixture so that the illumination space has a predetermined illuminance set in advance based on the extraction result; A lighting control device characterized by the above. An illuminance sensor having at least two light receiving elements having different spectral sensitivity characteristics and measuring the illuminance of the illumination space by each of the light receiving elements;
A controller that calculates the output of each light receiving element to extract a component in the visible light region, and controls irradiation of the lighting fixture so that the illumination space has a predetermined illuminance set in advance based on the extraction result; An illumination control device comprising: An illuminance sensor having a light receiving element and measuring the illuminance of the illumination space by the light receiving element;
Change means provided on the light receiving portion side of the light receiving element, and changing the spectral sensitivity characteristic of the light receiving element;
Luminaires that extract the components of the visible light region by calculating each output of the light receiving element when the changing means is present or not, and extract the illumination space so that the illumination space has a predetermined illuminance set in advance based on the extraction result And a controller for controlling the irradiation of the illumination. The controller determines whether the illumination space is daytime or nighttime based on the output of the light receiving element, and performs a calculation to extract a visible light region component when the determination result is daytime. Item 4. The lighting control device according to any one of Items 1 to 3. 4. The illumination control apparatus according to claim 3, wherein the changing means is constituted by an optical filter, and the spectral sensitivity characteristic of the light receiving element is changed depending on the presence or absence of the optical filter. 4. The changing means according to claim 3, wherein the changing means is constituted by a liquid crystal panel whose transmittance changes electrically, and changes a spectral sensitivity characteristic of the light receiving element based on the transmittance of the liquid crystal panel. Lighting control device. A lighting fixture comprising the lighting control device according to claim 1.

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