JP4989091B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device in which the light color of output light is variable.

Conventionally, a lighting system using a plurality of lighting fixtures each including a light emitting diode of RGB three colors as a light source, and connecting a plurality of lighting fixtures and a control device for controlling the light output of each lighting fixture via a network Is provided (see, for example, Patent Document 1). In this system, the control device sends transmission data including information designating a destination lighting fixture and control data for controlling the light output of the lighting fixture to the network. Then, when the transmission data sent to the network is received by the lighting equipment to be controlled, the lighting equipment controls the light output of each light emitting diode based on the control data included in the received transmission data, and emits light. The color was controlled to the desired light color.
Japanese Patent Laying-Open No. 2005-158505 (paragraph numbers [0018] to [0025] and FIG. 1)

  In the lighting device using the above-described lighting fixture, the light color of the light source included in each lighting fixture is controlled by sending control data from the control device to each lighting fixture. When the light output of each light emitting diode fluctuates due to variations in light emitting diodes or changes over time, the color mixture ratio may change, the light color of the mixed light may fluctuate, and the illuminance may fluctuate. Also, depending on the location in the lighting space, the light color and illuminance of the illumination light change due to the influence of light reflected from the walls of the room and indoor furniture. There is a possibility that the color and illuminance may deviate from a predetermined standard value.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminating device capable of controlling the light color and light output of mixed color light to a constant value.

In order to achieve the above object, the invention of claim 1 includes a light emitting unit that has a plurality of types of semiconductor light emitting elements having different emission wavelengths and generates mixed color light emitted from each semiconductor light emitting element, and a light emitting unit. The amount of light for detecting the amount of light emitted from each semiconductor light emitting element included in the received light by receiving the mixed color light from the light emitting unit every time a predetermined sampling time elapses. When the detection value detected this time by the detection unit and the light amount detection unit has changed beyond a predetermined threshold value from the detection value at the previous sampling, the light amount detection unit detects the light amount of each emission wavelength detected this time A transmission unit that transmits the value to the luminaire is provided, and a light detection device that is formed separately from the luminaire body. In the lighting fixture, a receiving unit that receives the detection value of the light amount of each emission wavelength transmitted from the transmission unit, and a predetermined reference value in which the detection value of the light amount of each emission wavelength received by the reception unit is set in advance. A lighting circuit unit for individually controlling the light output of each semiconductor light emitting element is provided so as to match. The light detection device is provided with a color temperature setting unit that sets the color temperature of the mixed color light to a predetermined value according to an operation, and the color temperature setting unit includes an up button for increasing the color temperature of the mixed color light, A down button for reducing the color temperature of the mixed color light, and the main body of the photodetecting device is substantially rectangular parallelepiped, and the operation surface for turning on and off the lighting fixture in the main body and the side opposite to the operation surface A light receiving portion of the light amount detecting portion is provided on the back surface. When a setting operation is performed by the color temperature setting unit, the transmission unit transmits the color temperature setting value to the lighting fixture, and the lighting unit receives the color temperature setting value transmitted from the transmission unit. Then, a reference value setting unit that sets a reference value of the light amount of each emission wavelength based on the received setting value is provided.

  According to the first aspect of the present invention, the light amount detection unit of the light detection device receives the mixed color light from the light emitting unit and detects the light amount of each emission wavelength included in the received light. The amount of light actually irradiated from each semiconductor light emitting element can be detected at a place where a separate light detection device is placed. In addition, in the luminaire, the receiving unit receives the detection value of the light amount of each emission wavelength transmitted from the transmission unit of the light detection device, and the received detection value of the light amount of each light emitting element matches the predetermined reference value. Since the lighting circuit section controls the light output of each semiconductor light emitting element in a feedback manner, even if the light output of each semiconductor light emitting element changes due to variations in elements or changes over time, the light detection device is placed. There is an effect that the light color and the illuminance of the mixed color light can be controlled to a constant value by controlling the amount of the irradiation light from each semiconductor light emitting element to a predetermined reference value at the place.

Furthermore, when the color temperature of the mixed color light is set using the color temperature setting unit of the light detection device, the color temperature setting value is transmitted from the transmission unit, and in the lighting fixture, the reference value setting unit is received by the reception unit. Since the reference value of the light output of each emission wavelength is set based on the set value of the color temperature, the color temperature of the mixed light can be set to the color temperature set by the color temperature setting unit.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
Embodiment 1 of the lighting device according to the present invention will be described with reference to FIGS. 1 and 2. The illuminating device of this embodiment is formed separately from the luminaire A including a light emitting diode as a light source and the luminaire main body 10 of the luminaire A, and detects a light amount of light having a plurality of light emission wavelengths to generate a wireless signal. It is comprised with the remote control apparatus B which transmits to the lighting fixture A.

  As shown in FIG. 1B, the remote control device B as the light amount detection device includes, for example, a color meter that detects tristimulus values of the light color of the received light, and displays the mixed color light emitted from the light emitting unit 2 described later. A light amount detection unit 21 that receives light and detects a light amount of each emission wavelength included in the received light, an on switch 22 for turning on the lighting fixture A, and an off switch 23 for turning off the lighting fixture A Then, for example, a wireless transmitter 24 that transmits a wireless signal composed of an optical signal such as infrared rays, and a detection value is read from the light amount detector 21 at a predetermined sampling period, or an operation signal is input from each of the switches 22 and 23. Then, the control unit 25 that transmits the detection value of the light amount detection unit 21 or the operation signal of each of the switches 22 and 23 from the wireless transmission unit 24 by a wireless signal, and the battery as a power source Light quantity detecting unit 21 and the wireless transmission section 24, and a power supply unit 26 for supplying operating power, etc. to the control unit 25.

  On the other hand, as shown in FIG. 1A, the lighting fixture A has three types of light emitting diodes (red light emitting diode 1R, green light emitting diode 1G, and blue light emitting diode 1B) having different emission wavelengths, and each light emitting diode 1R. , 1G, 1B, a light emitting unit 2 for generating mixed color light, a wireless receiving unit 3 for receiving a wireless signal transmitted from the remote control device B, and light emission based on the wireless signal received by the wireless receiving unit 3 And a lighting circuit unit 4 that controls the lighting state of the unit 2. Then, the lighting circuit unit 4 is configured to store each light emitting diode 1R based on a control signal input from a storage unit 5 in which a reference value of the light amount of each of the light emitting diodes 1R, 1G, and 1B is set in advance and a light output setting unit 7 described later. , 1G, 1B, LED driving units 6R, 6G, 6B that individually control the forward current supplied to each of the light emitting diodes 1R, 1G, and 1B based on the operation signals of the on switch 22 and the off switch 23 received by the wireless receiving unit 3. , 1G, 1B, and a control signal for turning on / off the forward current supplied to the 1G, 1B, and the amount of light of each emission wavelength (that is, each of the light emitting diodes 1R, 1G, 1B) received by the wireless receiver 3 in the lighting state. A control for individually controlling the light output of each of the light emitting diodes 1R, 1G, and 1B so that the detected value matches the reference value set in the storage unit 5, respectively. And an optical output setting unit 7 for outputting a signal.

  FIG. 2 is a schematic configuration diagram of the lighting apparatus according to the present embodiment. A lighting fixture body 10 of the lighting fixture A includes a substantially disc-shaped main portion 12 and a side portion 13 that protrudes downward from a peripheral portion of the main portion 12. And a lens body 14 attached to the lower opening of the body 11. On the lower surface of the main portion 12, a plurality of three types of light emitting diodes 1R, 1G, and 1B constituting the light emitting portion 2 are evenly arranged with a predetermined interval. The lens body 14 is formed of a synthetic resin molded product having translucency, and a convex lens portion 14a that is convex downward is integrally molded at a portion corresponding to the light emitting diodes 1R, 1G, and 1B disposed in the main portion 12. It is. Thus, by controlling the light distribution of the light emitted from the corresponding light emitting diodes 1R, 1G, and 1B by the respective convex lens portions 14a, the light emitted from the respective light emitting diodes 1R, 1G, and 1B is mixed and obtained. The illumination space is irradiated with the mixed color light.

  The number and arrangement of the light-emitting diodes 1R, 1G, and 1B arranged in the main portion 12 are not limited to the above-described form, and the light-emitting diodes 1R, 1G, and 1B are arranged in accordance with conditions such as usage and place of use. The number and arrangement may be set as appropriate. In this embodiment, the light source unit 2 includes RGB three-color light emitting diodes 1R, 1G, and 1B as semiconductor light emitting elements. However, it is only necessary to include a plurality of types of light emitting diodes having different emission wavelengths. However, the semiconductor light emitting element such as organic EL or FED may be used.

  On the other hand, the gripping main body 30 of the remote control device B has a substantially rectangular parallelepiped shape and is formed in a size that can be gripped by a human hand. The circuit shown in FIG. It is. On the operation surface of the gripping main body 30, the above-described push buttons 32 and 33 of the on switch 22 and the off switch 23 are arranged at the central portion and one end side in the longitudinal direction, respectively, and the light amount detecting portion 21 is disposed at the other end side in the longitudinal direction. The light receiving unit 31 is arranged. A transmission window 34 that transmits a wireless signal is provided at the end of the grip body 30 in the longitudinal direction, and the wireless transmitter 24 is accommodated inside the grip body 30 so as to face the transmission window 34. . Note that a light receiving unit 31 of the light amount detection unit 21 is also provided on the back surface (not shown) of the grip body 30 so that illumination light can be received regardless of which surface is placed upward. In addition, the light receiving unit 31 of the light amount detection unit 21 may be disposed on, for example, the operation surface and the back surface of the grip body 30 and the other side surface so that illumination light can be received on three surfaces. The part 31 itself may be formed in a shape capable of receiving light from multiple directions.

  Next, the operation of the lighting device will be described. When the user performs an on operation by pressing the push button 32 of the remote control device B while the lighting fixture A is turned off, an operation signal is given from the on switch 22 to the control unit 25, and the control unit 25 performs an operation of lighting the light emitting unit 2. The signal is transmitted from the wireless transmission unit 24. At this time, when the wireless receiver 3 of the luminaire A receives an operation signal transmitted as a wireless signal from the remote control device B, the light output setting unit 7 performs control to turn on the light emitting unit 2 based on the operation signal. . That is, the light output setting unit 7 determines a control signal to be output to each of the LED driving units 6R, 6G, 6B based on a reference value preset in the storage unit 5, and the LED driving units 6R, 6G, 6B are input. By controlling the forward current supplied to each of the light emitting diodes 1R, 1G, and 1B based on the control signal, the light emission amount of each of the light emitting diodes 1R, 1G, and 1B is controlled and the mixed color light is irradiated to the illumination space. .

  When the lighting fixture A is turned on, the control unit 25 of the remote control device B reads the detection value of the light amount of each emission wavelength from the light amount detection unit 21 every time a predetermined sampling time elapses, and the amount of change from the previous sampling value is changed. When the predetermined threshold value is exceeded, the detection value of the light quantity detection unit 21 is transmitted from the wireless transmission unit 24 by a wireless signal. At this time, when the wireless receiver 3 of the luminaire A receives the detection value of the light amount of each emission wavelength transmitted from the remote control device B as a wireless signal, the light output setting unit 7 causes each light-emitting diode based on this detection value. The optical output of 1R, 1G, and 1B is feedback controlled. In other words, the light output setting unit 7 compares the detection value of the light amount of each emission wavelength with the reference value preset in the storage unit 5 and each of the light emitting diodes 1R, 1G, 1B so that the detection value matches the reference value. A control signal for increasing or decreasing the forward current supplied to the LED driving unit 6 is generated and output to each of the LED driving units 6R, 6G, and 6B. Each LED drive unit 6R, 6G, 6B increases or decreases the forward current supplied to the corresponding light emitting diodes 1R, 1G, 1B based on the control signal input from the light output setting unit 7. The light color and the illuminance of the mixed color light are controlled to be substantially constant by matching the light amount of the light emitted from each of the light emitting diodes 1R, 1G, and 1B with a predetermined reference value.

  On the other hand, when the user performs an off operation by pressing the push button 33 of the remote control device B while the lighting fixture A is lit, an operation signal is given from the off switch 23 to the control unit 25, and the control unit 25 turns off the light emitting unit 2. The operation signal to be transmitted is transmitted from the wireless transmission unit 24. At this time, when the wireless receiver 3 of the lighting fixture A receives an operation signal transmitted as a wireless signal from the remote control device B, the light output setting unit 7 performs control to turn off the light emitting unit 2 based on the operation signal. . That is, the light output setting unit 7 outputs a control signal for stopping the supply of the drive current to each LED drive unit 6R, 6G, 6B, and the drive current based on the control signal to which the LED drive units 6R, 6G, 6B are input. The light emitting diodes 1R, 1G, and 1B are turned off by stopping the supply of.

  As described above, in the present lighting device, the light amount detection unit 21 of the remote control device B, which is a light detection device, has a region where the remote control device B is placed, that is, a region where a person operating the remote control device B exists. In this case, the irradiation light from the light emitting unit 2 is received and the light amount of each emission wavelength included in the received light is detected, so that the work area is actually irradiated from each of the light emitting diodes 1R, 1G, 1B. The amount of light emitted can be detected. When the lighting fixture A is turned on, the wireless receiver 3 receives the detected value of the light amount of each emission wavelength transmitted from the remote control device B as a wireless signal, and the received detected value of the light amount of each of the light emitting diodes 1R, 1G, 1B. Since the light output setting unit 7 feedback-controls the light output of each of the light emitting diodes 1R, 1G, 1B so that the light output matches the reference value set in advance, the light output of each of the light emitting diodes 1R, 1G, 1B is Even if it changes due to variations in elements or changes over time, the light color and illuminance of the illumination light can be controlled to a constant value in the work area.

  Although it is conceivable to provide a light amount detector for detecting the amount of light emitted from each of the light emitting diodes 1R, 1G, and 1B on the side of the luminaire A, the illumination is affected by the influence of reflected light from the walls of the room or indoor furniture. An error occurs between the light amount of each emission wavelength detected on the side of the instrument A and the light amount of each emission wavelength included in the light irradiated to the work area, and as a result, the light color and illuminance of the illumination light in the work area May fluctuate. On the other hand, in this embodiment, since the light quantity detection unit 21 is provided in the remote control device B formed separately from the lighting fixture body 10, the place where the remote control device B is placed, that is, the remote control device B is operated. In a work area where people are present, the amount of light of each emission wavelength included in the illumination light can be detected, and the light color and illuminance of the actual work area can be fed back to control the light color and illuminance to be constant. It is.

(Embodiment 2)
Embodiment 2 of the illumination device according to the present invention will be described with reference to FIG. In the first embodiment, the color temperature of the mixed color light is constant, whereas in the illumination device of the present embodiment, the color temperature of the mixed color light is variable. Since the configuration other than the color temperature setting unit 27 and the reference value setting unit 8 to be described later is the same as that of the lighting device of the first embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted. .

  In the present embodiment, in the lighting device of the first embodiment, the remote controller B is provided with a color temperature setting unit 27 that sets the color temperature of the mixed color light to a predetermined value according to an operation, and the set value of the color temperature setting unit 27 Is transmitted from the wireless transmission unit 24 as a wireless signal, and the luminaire A is provided with a reference value setting unit 8 that sets a reference value of the light amount of each emission wavelength based on the setting value received by the wireless reception unit 3. .

  The color temperature setting unit 27 has three color temperature switching buttons (bulb color button 27a, daylight color button 27b, and clear color) for switching the color temperature of the mixed color light to a light bulb color (3000K), a daylight color (5000K), and a clear color (8000K). The color temperature of the mixed color light can be selectively switched by operating any one of the buttons 27a to 27c. When the setting operation is performed by the color temperature setting unit 27, the control unit 25 causes the wireless transmission unit 24 to transmit the setting value of the color temperature corresponding to the operated buttons 27a to 27c by a wireless signal.

  On the other hand, in the lighting fixture A, the reference value of the light quantity of each light emission wavelength of RGB is registered in advance in the storage unit 5 for each set value of the color temperature, and the reference value setting unit 8 receives the wireless receiver 3. When the set value of the color temperature is input, the light intensity reference value of each emission wavelength corresponding to the set value is read from the storage unit 5 and output to the light output setting unit 7. At this time, in the light output setting unit 7, the detected values of the light amounts of the respective emission wavelengths (that is, the respective light emitting diodes 1 R, 1 G, and 1 B) received by the wireless receiving unit 3 are the reference values input from the reference value setting unit 8. The light outputs of the respective light emitting diodes 1R, 1G, and 1B are individually controlled so as to match the above, and the color temperature of the mixed color light can be easily changed to the color temperature switched by the remote control device B.

  In the present embodiment, the color temperature setting unit 27 has a plurality of selection buttons (bulb color button 27a, daylight color button 27b, clear color button 27c) that selectively switch the mixed color light setting value to any one of the predetermined setting values. The color temperature setting unit 27 is a seesaw type switch in which the color temperature increases when one button (up button) is pressed and the color temperature decreases when the other button (down button) is pressed. May be configured.

  In this case, when the up button or the down button is pressed, the control unit 25 causes the wireless transmission unit 24 to transmit a sweep start signal that gradually increases or decreases the set value of the color temperature, and releases the up button or the down button. The control unit 25 causes the wireless transmission unit 24 to transmit a sweep stop signal that stops the operation of increasing or decreasing the set value of the color temperature. In the luminaire A, when the wireless reception unit 3 receives the sweep start signal, the reference value setting unit 8 gradually increases or decreases the set value of the color temperature, and each emission wavelength registered in the storage unit 5 in advance. Based on the reference value data, the reference value of each emission wavelength is gradually changed according to the change of the color temperature. Thereafter, when the wireless reception unit 3 receives the sweep stop signal, the reference value setting unit 8 stops the change of the set value of the color temperature, and accordingly, the set value of the light amount of each emission wavelength is set to a predetermined value. . Here, the light output setting unit 7 includes the light emitting diodes 1R, 1R, and the like so that the light amounts of the respective emission wavelengths detected by the light amount detection unit 21 of the remote control device B coincide with the reference values set by the reference value setting unit 8. The output of 1G and 1B is controlled, and the color temperature of the mixed color light is changed stepwise by changing the light output of each of the light emitting diodes 1R, 1G and 1B according to the operation of the color temperature setting unit 27. Can do. Instead of the seesaw type switch, the color temperature setting unit 27 may be configured by a rotary encoder or the like that can set the color temperature by rotating, and the color temperature of the mixed color light is set stepwise as described above. can do.

  In each of the above-described embodiments, since the signal is transmitted and received by the wireless signal between the wireless transmission unit 24 of the remote control device B and the wireless reception unit 3 of the lighting device A, the remote control device B can be placed anywhere. The lighting device A and the remote control device B are connected by a signal line (not shown), and each light emission is performed between the transmission unit of the remote control device B and the reception unit of the lighting device A. Needless to say, the detection value of the light amount of the wavelength, the setting value of the color temperature, and the operation signal may be transmitted and received via the signal line.

The illuminating device of Embodiment 1 is shown, (a) is a block diagram of a lighting fixture, (b) is a block diagram of a photon detection device. It is explanatory drawing which shows schematic structure of an illuminating device same as the above. The illuminating device of Embodiment 2 is shown, (a) is a block diagram of a lighting fixture, (b) is a block diagram of a photon detection device.

Explanation of symbols

A Lighting device B Remote control device 1R, 1G, 1B Light emitting diode 3 Wireless receiver 4 Lighting circuit 24 Wireless transmitter

Claims (1)

A light-emitting unit having a plurality of types of semiconductor light-emitting elements having different emission wavelengths and generating mixed color light emitted from each semiconductor light-emitting element, and a lighting fixture including a lighting fixture body that supports the light-emitting unit;
Each time a predetermined sampling time elapses, the light amount detecting unit that receives the mixed color light from the light emitting unit and detects the light amount of the emission wavelength of each semiconductor light emitting element included in the received light, and the light amount detecting unit this time Transmission that transmits the detected value of the light amount of each emission wavelength detected by the light amount detection unit to the luminaire when the detected value that has been detected exceeds a predetermined threshold value from the detection value at the time of previous sampling. A light detection device formed separately from the lighting fixture body,
A receiving unit that receives the light intensity detection value of each light emission wavelength transmitted from the transmission unit to the lighting device, and the light intensity detection value of each light emission wavelength received by the reception unit matches a predetermined reference value. And a lighting circuit unit for individually controlling the light output of each semiconductor light emitting element,
The light detection device is provided with a color temperature setting unit that sets a color temperature of the mixed color light to a predetermined value in accordance with an operation, and the color temperature setting unit is configured to increase the color temperature of the mixed color light. A button and a down button for reducing the color temperature of the mixed color light, and the main body of the light detection device has a substantially rectangular parallelepiped shape, and an operation surface for performing an ON operation and an OFF operation of the lighting fixture in the main body And a light receiving portion of the light amount detecting portion is provided on the back surface opposite to the operation surface,
When the setting operation by the color temperature setting unit is performed, the transmission unit transmits a color temperature setting value to the lighting fixture,
When the receiving unit receives the color temperature setting value transmitted from the transmission unit, the lighting device is provided with a reference value setting unit that sets a reference value of the light amount of each emission wavelength based on the received setting value. A lighting device characterized by that.

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