JPH1140377A - Power supply for brightness detection unit and lighting equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To control the power supply of a lighting fixture based on the brightness of the lighting area of the lighting fixture. Easy to apply. A lighting device is provided between a lighting device and a power supply.
A power supply unit 20 that can supply and stop the power supply of 0 is provided.
A light detection unit 10 is provided. The light detection unit 10 is provided with a photodiode so as to receive ambient light through a window 19 provided in a case. When the output of the photodiode falls below a predetermined reference value, an infrared transmitter is provided. , An infrared signal for turning on the power is transmitted to the power supply unit 20. Power supply unit 20
Receives the infrared signal transmitted from the brightness detection unit 10, supplies power to the lighting equipment 30, and turns on the lighting equipment 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brightness detection unit for detecting ambient brightness and transmitting a predetermined wireless signal, and a lighting device for controlling a power supply for a lighting fixture using the brightness detection unit. The present invention relates to an appliance power supply.

[0002]

2. Description of the Related Art Lighting equipment is usually provided with a switch provided on a wall or the like remote from the lighting equipment, or a light emitting device disclosed in Japanese Patent Laid-Open No. 7-21 / 1995.
As disclosed in Japanese Patent No. 1129, the light is turned on and off by operating a switch directly attached to the lighting fixture. However, when a switch fixedly provided at a predetermined position is operated as described above, a person who operates the switch needs to move to that position, and there is a problem in operability.

[0003] Instead of such a fixed switch,
A remote control switch unit that is separated from the lighting equipment has also been developed. In this case, by operating a switch provided on the remote control type switch unit, a wireless signal for turning on / off the power by infrared light or the like is transmitted from the switch unit, and the wireless signal is transmitted by a receiver provided on the lighting equipment. When the signal is received, the lighting fixture is turned on or off. However, in this case, it is necessary to provide the lighting device with a function of turning on or off the lighting device in accordance with the output of the wireless signal for turning the power on and off and the output from the receiver. Therefore, in a lighting fixture without such a function, even if a switch of the switch unit is operated, the lighting fixture cannot be turned on and off. Further, the switch operation itself of the switch unit must be artificially performed, and therefore, there is a possibility that a situation in which the lighting apparatus is left in a lit state may occur.

[0004] Instead of turning on and off the luminaire by such a switch operation, for example, Japanese Patent Application Laid-Open No. H6-119.
As disclosed in Japanese Patent Application Laid-Open No. 978, a method of lighting a lighting fixture by detecting the presence of a person at a predetermined position by a sensor has also been developed. However, in such a method, in a narrow space such as a corridor or a stairway where a person temporarily passes, a single sensor can reliably detect the presence of a person, and the sensor It is effective to turn on and off the lighting equipment based on the lighting equipment, but in a relatively large space such as a living room, a working room, a private room, or the like, the lighting equipment is based on the presence of a person at any position in the space. There is a problem that it is not easy to turn on and off the light. As described above, in a relatively large space, a large number of sensors must be positioned and provided in order to accurately detect the presence of a person and to turn on and off the luminaire. In addition, there is a problem that economic efficiency is impaired.
Furthermore, in this case, when the presence of a person is detected by the sensor in a case where the image is brightened by sunlight, the lighting fixture is turned on, and the energy saving effect may be impaired.

[0005] In contrast to these methods, a method has been developed in which a sensor for detecting ambient brightness is attached to a streetlight, and the streetlight is turned on and off based on the detection result of the sensor.

[0006]

However, in this case, the sensor for detecting the brightness of the surroundings is integrally attached to the streetlight installed outdoors.
When installing a streetlight, there is a problem that the sensor must be installed at a predetermined position, and the work for that is not easy. Also, once the sensors and street lights are installed, their locations cannot be changed. Furthermore, since the sensor is integrally attached to the streetlight, there is a problem that it is not easy to attach the sensor to the already installed streetlight.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a brightness capable of detecting the brightness of an arbitrary position in a lighting area of a lighting fixture without any manual operation. It is an object of the present invention to provide a detection unit and a power supply device of a lighting fixture capable of controlling a power supply of the lighting fixture based on the brightness detection unit. Another object of the present invention is to provide a brightness detection unit and a power supply device for a lighting fixture that can be installed without requiring special construction and the like, and that can be easily applied to commercially available lighting fixtures. It is in.

[0008]

A brightness detection unit according to claim 1 is arranged in a case so as to receive ambient light, and outputs a signal corresponding to the amount of received light. A transmitter for transmitting a power-on wireless signal when the amount of light received by the photodiode falls below a predetermined reference value.

[0009] The brightness detecting unit according to claim 2 is
The reference value can be changed. The brightness detection unit according to claim 3, wherein after the power-on wireless signal is transmitted from the transmitter, the power-off wireless signal is transmitted from the transmitter when the amount of light received by the photodiode gradually increases. Is outgoing.

[0010] The brightness detection unit according to claim 4 is
The transmitter transmits a power-on wireless signal when the DC component of light received by the photodiode falls below a predetermined lower limit, and turns off the power when the DC component of the light falls below a predetermined upper limit. Of wireless signals.

According to a fifth aspect of the present invention, there is provided a power supply device for a lighting fixture,
A power-on wireless device, which is provided between the brightness detection unit according to claim 1 and a lighting device and a power supply so as to be able to supply and stop power to the lighting device, and is transmitted from the light detection unit. By receiving the signal, while supplying power to the lighting equipment,
A power supply unit configured to stop supplying power to the lighting apparatus by receiving a wireless signal of power off.

According to a sixth aspect of the present invention, there is provided a power supply device for a lighting apparatus,
The power supply unit stops supplying the power when a predetermined time has elapsed since the power was supplied to the lighting fixture.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating an example of an embodiment of a power supply device for a lighting fixture of the present invention. The power supply device of the lighting apparatus includes a brightness detection unit 1 according to the present invention that transmits a predetermined infrared signal as a wireless signal for powering on and off based on the amount of ambient light.
0 controls the power supply to the lighting equipment 30. In this embodiment, in order to control the power supply to the lighting equipment 30 provided on the ceiling 44 indoors, the brightness detection unit 10 is arranged on, for example, a desk 41 in an illumination area of the lighting equipment 30. . The lighting fixture 30 provided on the ceiling 44 and the lighting fixture 3
A power supply unit 20 that receives an infrared signal from the brightness detection unit 10 is provided between the power supply unit 20 and the power supply (outlet).

The brightness detection unit 10 may be arranged in any place as long as it is an illumination area by the lighting fixture 30. The arrangement is not limited to the arrangement on the desk 41, and the two-dot chain line in FIG. As shown in FIG.
3 may be fixed.

FIG. 2 is a block diagram showing the internal configuration of the brightness detection unit 10. As shown in FIG. This brightness detection unit 1
0 has a photodiode 11 arranged in the case. The photodiode 11 is arranged to face a window 19 (see FIG. 1) provided in the case so as to receive visible light around the case, and to receive visible light around the case. Then, a predetermined analog signal corresponding to the amount of received light is output. An analog signal output from the photodiode 11 is amplified by an amplifier 12 and output to an AD (analog-digital) converter 13. A / D converter 13
Is output by the photodiode 11 and the amplifier 1
The analog signal amplified in 2 is converted into a digital signal and output to a microcomputer (microcomputer) 14. Therefore, the microcomputer 14 receives a digital signal corresponding to the amount of visible light received by the photodiode 11, that is, a digital signal corresponding to the surrounding brightness.

The microcomputer 14 receives a reference signal which can be adjusted by the variable resistor 15. The microcomputer 14 compares the reference signal with a digital signal output from the A / D converter 13. Then, when the digital signal falls below the reference signal output from the variable resistor 15,
A predetermined signal is output to the infrared transmitter 16. The infrared transmitter 16 transmits an infrared power-off signal modulated by a predetermined signal from the microcomputer 14 so as to be hardly affected by noise. The infrared rays are transmitted outside through a window provided in the case.

FIG. 3 is a block diagram showing the internal configuration of the power supply unit 20 provided in the lighting fixture 30. The power supply unit 20 has an outlet 21 into which a power plug of the lighting fixture 30 is inserted, and the lighting fixture 30
Has a plug 22 to be inserted into an outlet which is a power source of the power supply. The plug 22 of the power supply unit 20 is inserted into an outlet serving as a power supply of the lighting fixture 30 and is in an electrically connected state, and the power plug of the lighting fixture 30 is inserted into the outlet of the power supply unit 20. And are electrically connected.

The power supply unit 20 is provided with an infrared receiver 23 for receiving the modulated infrared light transmitted from the brightness detection unit 10. The receiving section of the infrared receiver 23 is provided with a window 29 provided in the case of the power supply unit 20.
(See FIG. 1). The infrared receiver 23 receives the modulated power-off infrared signal transmitted from the brightness detection unit 10 and demodulates the signal into an unmodulated digital mode. By confirming that the demodulated infrared light is a predetermined signal output from the brightness detection unit 10, the microcomputer 24
Output a predetermined signal. When receiving the predetermined signal output from the infrared receiver 23, the microcomputer 24 turns on the transistor 25 for a predetermined time set in advance.

The transistor 25 is provided so as to turn on and off a relay 26 provided between the plug 22 and the outlet 21. When the transistor 25 is turned on, the relay 26 is turned on. Electric current flows from the plug 22 to the outlet 21. This allows
Power is supplied to the lighting fixture 30 through a plug of the lighting fixture 30 inserted into the outlet 21 so that the lighting fixture 30
Lights up. As the relay 26 provided between the plug 22 and the outlet 21, for example, a non-contact SSR
(Solid State Relay).

The transistor 25 is turned off after a lapse of a predetermined time set in the microcomputer 24. As a result, the relay 26 is turned off, no current flows from the plug 22 to the outlet 21, and the lighting apparatus 30 is turned off.

In the power supply device for a lighting device having such a configuration, the power plug of the lighting device 30 provided on the ceiling 44 is inserted into the outlet 21 of the power supply unit 20 so as to be electrically connected. Then, the plug 22 of the power supply unit 20 is inserted into the power outlet of the lighting fixture 30 to be electrically connected. Also,
The brightness detection unit 10 is disposed in an illumination area of the lighting fixture 30 and the brightness detection unit 10
The attitude of the brightness detection unit 10 is adjusted so that the direction of transmission of infrared light from the infrared transmitter 16 provided in the power supply unit 20 attached to the lighting fixture 30 is directed to the receiving portion of the infrared receiver 23. .

In such a state, for example, when the lighting device 30 is turned off in the daytime, the photodiode 11 of the brightness detection unit 10 receives the surrounding natural light and generates the visible light in the natural light. An analog signal corresponding to the amount of received light is output. When the amount of visible light received by the photodiode 11 is sufficiently large that illumination by the lighting device 30 is unnecessary, the output of the photodiode 11 is based on a reference value set in the microcomputer 14. Therefore, the power-on infrared signal is not transmitted from the infrared transmitter 16, so that the power supply unit 20 does not receive the power-on infrared signal and the lighting fixture 30 is not turned on.

Thereafter, as shown in FIG. 4, when the daylight shifts from day to night, or when the day shifts from sunny to cloudy, natural light decreases (step S1 in FIG. 4).
(The same applies hereinafter), the amount of visible light received by the photodiode 11 decreases, and the signal output from the photodiode 11 and converted into a digital signal decreases (Step S).
2) When the value falls below a predetermined reference value set by the variable resistor 15 (step S3), the microcomputer 14 operates the infrared transmitter 16 and modulates the infrared transmitter 16 so as not to be affected by noise. The power-on infrared signal is transmitted to the power supply unit 20 (step S4). In this case, if the output signal from the photodiode 11 is not less than the predetermined reference value set by the variable resistor 15, the infrared signal for turning on the power is not transmitted from the infrared oscillator 16 (step S5).

On the other hand, in the power supply unit 20, the microcomputer 2
4 is the output of the infrared receiver 23 as shown in FIG.
The power-on infrared signal, which is always read (step S6) and transmitted from the brightness detection unit 10, is received by the infrared receiver 23, and the received modulated infrared signal is demodulated into a digital signal. Is input to the infrared receiver 2 (step S7).
3. Confirm that the power-on infrared signal received at 3 is transmitted from the brightness detection unit 10,
The transistor 25 is turned on for a predetermined time set in advance, the relay 26 is turned on for a predetermined time (step S8), and power is supplied from the plug 22 to the outlet 21. Thereby, the lighting equipment 30 is turned on (step S9).

When the lighting equipment 30 is turned on, the lighting equipment 30
Becomes brighter and the amount of visible light increases. Thereby, the photodiode 11 of the brightness detection unit 10
Is greater than or equal to the reference value. However, the microcomputer 24 of the power supply unit 20 continues to operate until the predetermined time set in advance (step S10).
Since the lighting device 5 is turned on (step S11), the lighting device 30 is kept turned on without being turned off. When a predetermined time set in the microcomputer 24 elapses, the transistor 25 is turned off (step S12).
6 is turned off, and the lighting fixture 30 is turned off (step S13).

At this time, if the natural light amount around the brightness detection unit 10 is reduced, the lighting fixture 3
By turning off 0, the output from the photodiode 11 of the brightness detection unit 10 falls below a predetermined reference value set by the variable resistor 15 so that the power is turned on from the infrared transmitter 16 of the brightness detection unit 10. An infrared signal is emitted. Thereby, the power supply unit 20 receives the infrared signal of power-on, the transistor 25 is turned on again for a predetermined time, and the lighting fixture 30 is turned on for a predetermined time.

On the other hand, when the lighting equipment 30 is turned off, for example, when the lighting equipment is turned from night to morning, or
When the natural light amount around the brightness detection unit 10 is increased by changing from a cloudy state to a sunny state, the output of the photodiode 11 of the brightness detection unit 10 exceeds a predetermined reference value. , Infrared transmitter 16
Does not emit a power-on infrared signal. Therefore,
Since the power supply unit 20 does not receive the power-on infrared signal from the brightness detection unit 10,
Is not supplied, and the lighting fixture 30 is turned off.

The lighting time of the lighting fixture 30 set in the microcomputer 24 in the power supply unit 20 depends on the power supply unit 2
0 is set to an appropriate time of several minutes to several hours in accordance with the average use time of the lighting equipment 30 provided with 0.

The reference value set by the variable resistor 15 provided in the light detection unit 10 is
It is set appropriately based on the natural light amount determined to require the illumination by 0.

In the above embodiment, the lighting equipment 30
Is turned off unless a predetermined time has elapsed after the light is turned on, but while the lighting fixture 30 is turned on,
When it is determined that the lighting of the lighting fixture 30 is unnecessary due to an increase in natural light, the brightness detection unit 10 outputs a power-off infrared signal, and the lighting fixture 30 is turned off by the power-off infrared signal. You may make it.

As shown in FIG. 6, the microcomputer 14 of the brightness detecting unit 10 determines that the amount of natural light has increased (step S14), and the signal output from the photodiode 11 and converted into a digital signal has increased. Is detected (step S15), it is determined whether or not the digital signal is gradually increasing (step S16). When it is detected that the digital signal is gradually increasing,
A power-off infrared signal may be transmitted from the infrared transmitter 16 (step S17). Thereby, the lighting fixture 30 is turned off only when the natural light gradually increases after the lighting fixture 30 is turned on. If the digital signal is rapidly increasing due to lighting of the lighting equipment 30, etc., the infrared transmitter 16
Does not transmit the power-off infrared signal (step S18).

FIG. 7 shows a state in which the lighting fixture 30 is turned on.
It is a block diagram showing other examples of brightness detection unit 10 constituted so that lighting equipment 30 may be turned off by increase of natural light. In the brightness detection unit 10, after the analog output of the photodiode 11 is amplified by the amplifier 12, the DC component is detected by the DC component (DC) detector 17, and the DC component is detected by the AD converter 13. The digital data is converted and input to the microcomputer 14. When the output of the photodiode 11 digitally converted by the A / D converter 13 is equal to or less than a transmission reference value set in advance by one of the variable resistors 15a, the microcomputer 14 sends the signal to the infrared transmitter 16. A predetermined signal is output, and the infrared transmitter 16 emits a power-on infrared signal.
When the power-on infrared signal is transmitted from the power supply and the output of the photodiode 11 becomes equal to or greater than the transmission stop reference value set by the other variable resistor 15b, the power-off infrared signal is transmitted from the infrared transmitter 16. Is to be transmitted.

The brightness detection unit 10 having such a configuration
In this configuration, light from a lighting device and natural light are separated from visible light received by the photodiode 11. That is, the luminaire 30 repeats the intensity in both the incandescent lamp and the fluorescent lamp by the cycle of the AC power supply or higher frequency, whereas the natural light by the sun is day and night or sunny. The intensity is repeated in a gentle cycle as compared with the intensity cycle of the lighting fixture 30 as if it were cloudy. For this, D
The C component detector 17 removes the AC component of the light received by the photodiode 11 and detects only the DC component, so that the light from the lighting fixture 30 is removed. As a result, the microcomputer 14 receives the output of the photodiode 11 corresponding to the received light amount of only natural light, and the microcomputer 14 controls the infrared transmitter 16 based on the natural light amount. .

Therefore, as shown in FIG. 8, the microcomputer 14 detects the digital amount based on the output from the photodiode 11 due to the decrease in the natural light amount (step 2).
1) If the DC component output from the photodiode 11 falls below a preset transmission reference value (step 22), a power-on infrared signal is transmitted from the infrared transmitter 16 (step 23) When the lighting device 30 is turned on by the unit 20 and the output of the DC component of the photodiode 11 exceeds the preset transmission stop reference value due to an increase in the natural light amount (step 24), the infrared ray A power-off infrared signal is transmitted from the transmitter 16 (step 25), and the lighting device 30 is turned off by the power supply unit 20. The output of the DC component in the photodiode 11 is
When it is within the predetermined range, the infrared transmitter 16 does not transmit the infrared signal for turning on and off the power.

In the above embodiment, the power supply device for turning on and off the power of the luminaire 30 provided on the ceiling 44 has been described. However, the present invention is not limited to such a configuration. For example, FIG. As shown, the present invention can be applied to the case where the power of the fluorescent lamp 31 provided on the desk 41 is turned on and off. In this case, the light detection unit 10 is
1 and the power supply unit 20 on the floor 42.
And the plug of the fluorescent lamp 31 may be inserted into the outlet 21 of the power supply unit 20 for use.

[0036]

As described above, the brightness detection unit and the power supply device of the lighting equipment according to the present invention can control the supply and stop of the power supply to the lighting equipment based on the ambient brightness. Operability and energy-saving effects are significantly improved. In addition, there is an excellent effect that no special work or the like for installation is required, and it can be easily applied to commercially available lighting equipment.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of a use state of a power supply device of a lighting fixture of the present invention.

FIG. 2 is a block diagram illustrating an example of a brightness detection unit used in a power supply device of the lighting fixture.

FIG. 3 is a block diagram illustrating an example of a power supply unit used for the power supply device of the lighting fixture.

FIG. 4 is a flowchart for explaining the operation of a brightness detection unit used in the power supply device.

FIG. 5 is a flowchart for explaining the operation of a power supply unit used in the power supply device.

FIG. 6 is a flowchart for explaining an operation in another example of the power supply unit used in the power supply device.

FIG. 7 is a block diagram showing another example of the brightness detection unit used in the power supply device of the lighting fixture.

FIG. 8 is a flowchart for explaining the operation of the brightness detection unit.

FIG. 9 is a schematic diagram showing another example of a use state of the power supply device of the lighting fixture of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Brightness detection unit 11 Photodiode 14 Microcomputer 16 Infrared transmitter 19 Window 20 Power supply unit 21 Outlet 22 Plug 23 Infrared receiver 24 Microcomputer 26 Relay 29 Window

Claims (6)

[Claims] 1. A photodiode which is arranged in a case so as to receive ambient light and outputs a signal corresponding to the amount of received light, and the amount of light received by the photodiode falls below a predetermined reference value. And a transmitter for transmitting a power-on wireless signal in a case. 2. The brightness detection unit according to claim 1, wherein the reference value is changeable. 3. The power-off wireless signal is transmitted from the transmitter when the light receiving amount of the photodiode is gradually increased after the power-on wireless signal is transmitted from the transmitter. The brightness detection unit according to 1. 4. The transmitter transmits a power-on wireless signal when the DC component of the light received by the photodiode falls below a predetermined lower limit, and rises above a predetermined upper limit. 2. The brightness detection unit according to claim 1, wherein a wireless signal for turning off the power is transmitted when the power is turned off. 5. The brightness detection unit according to claim 1, further comprising a power supply between the lighting equipment and a power supply, wherein the power supply to the lighting equipment and a stop of the power supply are provided. A power supply unit configured to supply power to the lighting fixture by receiving a power-on wireless signal, and to stop supplying power to the lighting fixture by receiving a power-off wireless signal. A power supply device for a lighting fixture, comprising: 6. The power supply for a lighting fixture according to claim 5, wherein the power supply unit stops supplying the power when a predetermined time has elapsed after supplying the power to the lighting fixture. apparatus.