JP2017021952A - Illumination control device, lighting device and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination control device, a lighting device and a luminaire that can suppress a user from feeling a discomfort to color matching.SOLUTION: A plurality of lighting circuit units are electrically and individually connected to a plurality of light sources, and are configured to be capable of adjusting an output to be supplied to each of the light sources. A controller is configured to control the plurality of lighting circuit units to adjust the output. Furthermore, when the light color of illumination light is gradually changed between a first light color of a relatively high color temperature and a second light color of a relatively low color temperature, the controller is configured to change the light color at a first time variation rate in a range close to the first light color. Still furthermore, the controller is configured to change the light color at a second time variation rate smaller than the first time variation rate in a range close to the second light color.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting control device, a lighting device, and a lighting fixture. More specifically, the present invention includes a lighting control device that dimmes and colors lighting light, a lighting device that includes the lighting control device and a light source, and the lighting device. It relates to lighting equipment.

  As a conventional example, a lighting apparatus described in Patent Document 1 is illustrated. The lighting fixture (illuminating device) described in Patent Literature 1 includes an illumination light source and a power supply unit (illumination control device) that turns on the illumination light source. The illumination light source has three types of light emitting elements (light emitting diodes) that emit light of three colors of R, G, and B, respectively. The power supply unit is configured to dimm and adjust the illumination light emitted from the illumination light source by adjusting the amount of power supplied to the three types of light emitting elements based on an instruction from the illumination controller.

  Further, the power supply unit gradually increases the rate of change of the color temperature when the color temperature is increased in a relatively low color temperature range (2200 [K] to 2700 [K]). On the other hand, in the color temperature range (2700 [K] to 5000 [K]) higher than the above range, the power supply unit keeps the change rate of the color temperature constant when the color temperature is increased.

JP2015-41602A

  By the way, light sources such as light emitting diodes generally have different light fluxes depending on the light color (color temperature). For example, the luminous flux of a light-emitting diode having a relatively low color temperature is smaller than that of a white light-emitting diode having a relatively high color temperature. Therefore, when the light color is gradually changed (toned) between the high color temperature and the low color temperature, the change in the color temperature is hardly perceived on the high color temperature side, and the change in the color temperature on the low color temperature side. Is easily perceived. Therefore, a person in an illumination space irradiated with illumination light may feel uncomfortable with the color matching.

  The present invention has been made in view of the above problems, and an object thereof is to make it difficult to feel a sense of incongruity with toning.

  An illumination control device according to the present invention includes a plurality of lighting circuit units that individually illuminate a plurality of light sources that emit light having different color temperatures, and a control unit that controls the plurality of lighting circuit units. A lighting control device that adjusts illumination light including light emitted from each light source, wherein the plurality of lighting circuit units are individually and electrically connected to the plurality of light sources, respectively. The output supplied to each is configured to be adjustable, and the control unit is configured to control the plurality of lighting circuit units to adjust the output, and the control unit is configured to adjust the light color of the illumination light. Is gradually changed between the first light color having a relatively high color temperature and the second light color having a relatively low color temperature, the first time change in a range close to the first light color The light color is changed at a rate, and the first light color is within a range close to the second light color. Wherein the second time rate of change is smaller than between the rate of change is configured to change the light color.

  The illumination device of the present invention includes a plurality of light sources that emit light having different color temperatures and an illumination control device.

  The lighting fixture of this invention has an illuminating device and the fixture main body which supports at least these said several light source, It is characterized by the above-mentioned.

  The lighting control device, the lighting device, and the lighting fixture of the present invention have an effect that it is difficult to make the user feel uncomfortable with the color matching.

It is a circuit diagram which shows the illuminating device and illumination control apparatus which concern on this embodiment. It is explanatory drawing for demonstrating operation | movement of the control part of the illuminating device which concerns on this embodiment, and an illumination control apparatus. 3A to 3C are perspective views showing the lighting fixture according to the present embodiment.

  A lighting control device, a lighting device, and a lighting fixture according to the present embodiment will be described in detail with reference to the drawings. The configurations described in the following embodiments are merely examples of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  As shown in FIG. 1, the lighting device A according to the present embodiment includes a light source unit 1 and a lighting control device 2. The light source unit 1 includes a first light source 10 and a second light source 11. The first light source 10 includes a series circuit of a plurality (two in the drawing) of the first light emitting elements 100. The second light source unit includes a series circuit of a plurality (two in the drawing) of second light emitting elements 110. The first light emitting element 100 is, for example, a light emitting diode that emits white light (light having a color temperature of 5000 [K]). The second light emitting element 110 is, for example, a light emitting diode that emits light bulb color light (light having a color temperature of 3000 [K]). However, the 1st light emitting element 100 and the 2nd light emitting element 110 may be light emitting elements other than light emitting diodes, such as an organic electroluminescent element. The light source unit 1 is configured to irradiate the illumination space with white light emitted from the first light source 10 and light bulb color light emitted from the second light source 11 as illumination light. Further, the light source unit 1 mixes the light amount (light beam) of the first light source 10 and the light amount (light beam) of the second light source 11 at an arbitrary ratio, thereby illuminating light in the range of 3000 [K] to 5000 [K]. The light color can be adjusted (toned). The number of light sources included in the light source unit 1 is not limited to two, and may be three or more. Further, the light color (color temperature) of the first light source 10 and the light color (color temperature) of the second light source 11 are examples, and may be light colors other than white and light bulb color.

  As shown in FIG. 1, the illumination control device 2 includes a first lighting circuit unit 20, a second lighting circuit unit 21, a control unit 22, a power supply unit 23, and the like. The first lighting circuit unit 20 is configured to pass a driving current (first driving current) through the first light source 10. The second lighting circuit unit 21 is configured to pass a driving current (second driving current) through the second light source 11.

  The power supply unit 23 is configured to convert AC power supplied from a commercial AC power supply 3 into DC power. For example, the power supply unit 23 is preferably configured with an input filter 230, a rectifier circuit 231, and a power factor correction circuit 232. The input filter 230 is composed of a low-pass filter, and is configured to, for example, pass the frequencies (60 [Hz] and 50 [Hz]) of the power supply voltage of the AC power supply 3 and cut off harmonic components. The rectifier circuit 231 is preferably configured with a diode bridge, for example. The power factor correction circuit 232 is preferably composed of a boost chopper circuit. The power factor correction circuit 232 includes a switching element Q2 made of a field effect transistor, a choke coil L2, a detection resistor R2, a diode D2, a smoothing capacitor C2, a driver circuit 2320 for switching the switching element Q2, and the like. The driver circuit 2320 is configured to detect the voltage across the detection resistor R2 and to control the on-duty of the switching element Q2 to make the voltage across the smoothing capacitor C2 (output voltage) constant.

  The first lighting circuit unit 20 is preferably composed of a step-down chopper circuit. The first lighting circuit unit 20 includes a first switching element Q11, a first inductor L11, a first diode D11, a first capacitor C11, a first resistor R11, a first drive circuit 200, and the like. The first switching element Q11 is preferably composed of, for example, an n-channel enhancement type MOSFET (field effect transistor). A series circuit of the first switching element Q11, the first diode D11, and the first resistor R11 is electrically connected between the output terminals of the power supply unit 23 (between both ends of the smoothing capacitor C2). A series circuit of the first inductor L11 and the first capacitor C11 is electrically connected between the anode and the cathode of the first diode D11. The first light source 10 is electrically connected between both ends of the first capacitor C11. The first drive circuit 200 is configured to match the first drive current flowing through the first resistor R11 (drive current of the first light source 10) with the target value by controlling the on-duty of the first switching element Q11. The Alternatively, the first drive circuit 200 may alternately switch between the period (conduction period) for switching the first switching element Q11 and the period (interval period) during which the first switching element Q11 is not switched, and adjust the ratio between the conduction period and the idle period. Good.

  The second lighting circuit unit 21 is preferably composed of a step-down chopper circuit. The second lighting circuit unit 21 includes a second switching element Q12, a second inductor L12, a second diode D12, a second capacitor C12, a second resistor R12, a second drive circuit 210, and the like. The second switching element Q12 is preferably composed of, for example, an n-channel enhancement type MOSFET. A series circuit of the second switching element Q12, the second diode D12, and the second resistor R12 is electrically connected between the output terminals of the power supply unit 23. A series circuit of the second inductor L12 and the second capacitor C12 is electrically connected between the anode and the cathode of the second diode D12. The second light source 11 is electrically connected between both ends of the second capacitor C12. The second drive circuit 210 is configured to match the second drive current flowing through the second resistor R12 (drive current of the second light source 11) with the target value by controlling the on-duty of the second switching element Q12. The Alternatively, the second drive circuit 210 may alternately switch between the conduction period for switching the second switching element Q12 and the non-switching idle period, and adjust the ratio between the conduction period and the idle period.

  The control unit 22 is preferably composed of a microcontroller having a CPU (Central Processing Unit), a memory, and the like. The control unit 22 controls the first lighting circuit unit 20 and the second lighting circuit unit 21 so that the program stored in the memory is executed by the CPU, so that the illumination light is dimmed and toned. Composed. The control unit 22 preferably receives, for example, a command from a controller called a dimmer / color adjuster, and operates so that the light color of the illumination light matches the light color requested by the command. The dimmer / color adjuster (controller) includes a slide operation type or rotation operation type input device. The operation position of the input device corresponds to the light color (color temperature) of the illumination light. In other words, the light control / color adjuster generates an instruction value of the light color of the illumination light based on the operation position of the input device operated by a person (operator), and sends a command including the generated instruction value to the illumination control device. 2 is configured to output to the second control unit 22. Alternatively, the dimmer / color adjuster may have a timer control function, and may be configured to output a command including an instruction value of the light color of the illumination light to the illumination control device 2 at a preset time.

  When the control unit 22 receives a command from the light control / color adjuster, the control unit 22 converts the light color instruction value (for example, the target color temperature of the illumination light) included in the command to the target value of the first drive current and the first value. 2 Converts to a target value of drive current. For example, the control unit 22 preferably performs conversion from the indicated value to the target value by referring to a data table stored in a memory (a memory included in the microcontroller). That is, this data table includes an arbitrary color temperature within the toning range (3000 [K] to 5000 [K]) and a ratio of the first drive current and the second drive current corresponding to the arbitrary color temperature. The correspondence is shown (see Table 1). For example, when the color temperature is 3000 [K], the target value of the first drive current may be set to 0 [%] and the target value of the second drive current may be set to 100 [%]. When the color temperature is 5000 [K], the target value of the first drive current may be set to 100 [%] and the target value of the second drive current may be set to 0 [%]. Furthermore, when the color temperature is 4000 [K], the target value of the first drive current and the target value of the second drive current may be set to 50 [%], respectively. In a range where the color temperature is higher than 3000 [K] and lower than 5000 [K], the respective target values of the first driving current and the second driving current are larger than 0 [%], and The range may be smaller than 100 [%]. Note that the target value of the first drive current and the target value of the second drive current are expressed with the respective rated values being 100 [%]. Then, the controller 22 gives the converted first drive current target value to the first drive circuit 200, and gives the converted second drive current target value to the second drive circuit 210.

  The first drive circuit 200 controls the on-duty of the first switching element Q11 so that the first drive current (output current) matches the target value of the first drive current received from the control unit 22. Similarly, the second drive circuit 210 controls the on-duty of the second switching element Q12 so that the second drive current (output current) matches the target value of the second drive current received from the control unit 22. . In this way, the illumination light emitted from the first light source 10 and the second light source 11 is toned to the light color indicated by the command from the dimmer / color adjuster. The amount of light (brightness) of the illumination light is determined by the total value of the first drive current and the second drive current. On the other hand, the light color (color temperature) of the illumination light is determined by the ratio of the first drive current and the second drive current. Therefore, the control unit 22 increases or decreases the total value of the first drive current and the second drive current while keeping the ratio of the first drive current and the second drive current constant, thereby making the light color constant and only the light amount. Can be changed (dimmed).

  Here, when changing the light color of the illumination light, the control unit 22 changes the light color stepwise from the target value corresponding to the light color before the change to the target value corresponding to the light color after the change. It is preferable to change gradually. For example, when changing the light color (first light color) having a color temperature of 5000 [K] to the light color (second light color) having a color temperature of 3000 [K], the control unit 22 takes several seconds (for example, about 3 seconds). It is preferable to reduce the light color step by step over the fade time. Similarly, when the control unit 22 changes the light color (second light color) having a color temperature of 3000 [K] to the light color (first light color) having a color temperature of 5000 [K], the control unit 22 takes several seconds (for example, 3 seconds). It is preferable to gradually increase the light color over a period of time.

  However, as described in the prior art, a change in light color is hardly perceived on the high color temperature side, and a change in light color is easily perceived on the low color temperature side. Therefore, the control unit 22 changes the light color at the first time change rate on the high color temperature side, and changes the light color at the second time change rate smaller than the first time change rate on the low color temperature side. It is preferable to make it. For example, the control unit 22 changes the light color at the first time change rate in a range close to the first light color (5000 [K]) as shown by the curve α and the curve β in FIG. On the other hand, the control unit 22 changes the light color at a second time change rate smaller than the first time change rate in a range close to the second light color (3000 [K]).

  For example, in a situation where the light color of the illumination light is set to 5000 [K], it is assumed that the control unit 22 receives an instruction to change the light color to 3500 [K] from the dimmer / color adjuster. . In this case, the control unit 22 gradually decreases the target value of the first drive current from 100.0 [%] to 25.0 [%], and sets the target value of the second drive current to 0 [%]. To 75.0 [%] in steps. However, the control unit 22 decreases the speed from 5000 [K] to 4100 [K] in about 0.5 [second], and decreases the speed from 4100 [K] to 3500 [K] in about 1.0 [second]. (See curve α in FIG. 2). That is, the control unit 22 performs the second change on the low color temperature side with respect to the first time change rate on the high color temperature side (≈900 [K] ÷ 0.5 [seconds] = 1800 [K / second]). The time change rate (≈600 [K] ÷ 1.0 [second] = 600 [K / second]) is reduced. In this example, the control unit 22 sets the second time change rate to about one third of the first time change rate.

  As described above, the control unit 22 changes the light color at the first time change rate (= 1800 [K / sec]) in a range close to the first light color (5000 [K]). On the other hand, in a range close to the second light color (3500 [K]), the control unit 22 changes the light color at a second time change rate (= 600 [K / sec]) smaller than the first time change rate. Change. For this reason, the light color (color temperature) changes from the first light color (5000 [K]) to the second light color (3500 [K]) at a substantially constant rate for the person in the space irradiated with the illumination light. Perceived as if you are. As a result, the illumination control device 2 according to the present embodiment can make it difficult to feel a sense of discomfort with respect to the toning.

  As described above, the illumination control device 2 according to the present embodiment includes a plurality of lighting circuit units (first light sources 10 and second light sources 11) that individually light a plurality of light sources (first light source 10 and second light source 11) that emit light having different color temperatures. 1 lighting circuit part 20 and 2nd lighting circuit part 21). Moreover, the illumination control device 2 according to the present embodiment is a lighting control device that includes a control unit 22 that controls a plurality of lighting circuit units, and colors the illumination light including light emitted from the plurality of light sources. The plurality of lighting circuit units are individually and electrically connected to the plurality of light sources, respectively, and are configured to be capable of adjusting the output supplied to each of the light sources. The control unit 22 is configured to control the plurality of lighting circuit units and adjust the output. Furthermore, when the control unit 22 gradually changes the light color of the illumination light between the first light color having a relatively high color temperature and the second light color having a relatively low color temperature, In the range close to the light color, the light color is changed at the first time change rate. Still further, the control unit 22 is configured to change the light color at a second time change rate smaller than the first time change rate in a range close to the second light color.

  The illumination control device 2 according to the present embodiment is configured as described above, and the ratio of the light color (color temperature) from the first light color to the second light color is substantially constant to the person in the space irradiated with the illumination light. Can be perceived as changing. As a result, the illumination control device 2 according to the present embodiment can make it difficult to feel a sense of discomfort with respect to the toning.

  Moreover, in the illumination control apparatus 2 according to the present embodiment, the control unit 22 preferably gradually changes the light color of the illumination light between the first light color and the second light color. At this time, the control unit 22 increases or decreases the outputs of the plurality of lighting circuit units (the first lighting circuit unit 20 and the second lighting circuit unit 21) at a relatively large time change rate in a range close to the first light color. It is preferable. Further, the control unit 22 is preferably configured to increase or decrease the outputs of the plurality of lighting circuit units at a relatively small time change rate in a range close to the second light color.

  If the illumination control device 2 according to the present embodiment is configured as described above, it is possible to easily change the temporal change rate of the light color.

  The illumination device A according to the present embodiment includes a plurality of light sources (first light source 10 and second light source 11) that emit light having different color temperatures, and the illumination control device 2.

  Since the illuminating device A according to the present embodiment is configured as described above, it is possible to make it difficult to feel a sense of discomfort with respect to toning.

  The lighting fixture B which concerns on this embodiment is demonstrated in detail with reference to FIG. 3A-FIG. 3C. The lighting fixture B according to the present embodiment is preferably configured as a downlight embedded in a ceiling as shown in FIG. 3A, for example. The luminaire B includes a luminaire main body 60 in which the luminaire A including the light source (the first light source 10 and the second light source 11) and the illumination control device 2 is housed, and a reflector 61. A plurality of heat radiation fins 600 project from the upper part of the instrument body 60. Further, a power cable 62 led out from the instrument body 60 is electrically connected to the AC power source 3.

  Moreover, it is preferable that the lighting fixture B which concerns on this embodiment is comprised as a spotlight attached to the wiring duct 7, as shown to FIG. 3B and FIG. 3C. The lighting fixture B shown in FIG. 3B is mounted on the fixture main body 63 in which the lighting device A including the light source (the first light source 10 and the second light source 11) and the lighting control device 2 is housed, the reflector 64, and the wiring duct 7. A connector portion 65, and an arm portion 66 that couples the connector portion 65 and the instrument main body 63 to each other. The connector unit 65 and the illumination control device 2 are electrically connected via the power cable 67.

  On the other hand, it is preferable that the lighting fixture B shown in FIG. 3C includes a fixture main body 68 in which the light sources (first light source 10 and second light source 11) are stored, and a box 69 in which the lighting control device 2 is stored. Furthermore, the lighting fixture B preferably includes a connecting portion 70 that connects the fixture main body 68 and the box 69, and a power cable 71 that electrically connects the light sources 10 and 11 and the lighting control device 2. Note that a connector portion 690 that is detachably and electrically connected to the wiring duct 7 is provided on the top surface of the box 69.

  As described above, the lighting fixture B according to the present embodiment includes the lighting device A and the fixture main bodies 60, 63, and 68 that support at least a plurality of light sources (first light source 10 and second light source 11).

  Since the lighting fixture B which concerns on this embodiment is comprised as mentioned above, it can make it hard to feel the discomfort with respect to toning.

A lighting device B lighting fixture 2 lighting control device 10 1st light source (light source)
11 Second light source (light source)
DESCRIPTION OF SYMBOLS 20 1st lighting circuit part 21 2nd lighting circuit part 22 Control part 60 Instrument main body 63 Instrument main body 68 Instrument main body

Claims (4)

A plurality of lighting circuit units for individually lighting a plurality of light sources that emit light having different color temperatures, and a control unit that controls the plurality of lighting circuit units, each of which emits light emitted from the plurality of light sources. An illumination control device for toning illumination light including:
The plurality of lighting circuit units are each separately and electrically connected to the plurality of light sources, and are configured to be capable of adjusting the output supplied to each of the light sources,
The control unit is configured to control a plurality of the lighting circuit units to adjust the output,
Further, when the control unit gradually changes the light color of the illumination light between the first light color having a relatively high color temperature and the second light color having a relatively low color temperature, The light color is changed at a first time change rate in a range close to the first light color, and the light color is changed at a second time change rate smaller than the first time change rate in a range close to the second light color. It is comprised so that it may change, The illumination control apparatus characterized by the above-mentioned.   The control unit, when gradually changing the light color of the illumination light between the first light color and the second light color, in a range close to the first light color of the plurality of lighting circuit units The output is increased / decreased at a relatively large time change rate, and the outputs of the plurality of lighting circuit units are configured to increase / decrease at a relatively small time change rate in a range close to the second light color. The lighting control device according to claim 1.   An illumination apparatus comprising: a plurality of light sources that emit light having different color temperatures; and the illumination control apparatus according to claim 1.   An illumination apparatus comprising: the illumination apparatus according to claim 3; and an apparatus main body that supports at least the plurality of light sources.