JP2015118759A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress shortening of the life of an LED module, when increasing a light beam further than the maximum value thereof suitable for the area of a room.SOLUTION: An LED lighting system 100 includes two LED modules 104, 105 of different color temperature, and a control section 104. The control section 104 controls the light beam so as to achieve the maximum value of light beam suitable for the area of a room, and to increase the light beam of the two LED modules 104, 105 so as to maintain the color temperature for the maximum value of light beam when an instruction of brightness increase mode for increasing the light beam further than the maximum value is accepted.

Description

  The present invention relates to a technique for dimming a lighting device.

  In recent years, LED (Light Emitting Diode) illumination devices have been developed that have significantly reduced power consumption compared to the power consumption of fluorescent lamp fixtures. The range of room brightness is determined by the Japan Lighting Industry Association according to the number of tatami mats. For example, the brightness range at 14 tatami is 5100 lm or more and less than 6100 lm.

  Patent Document 1 describes an LED illumination device having a function of increasing the dimming rate and making it brighter (paragraph 0010 and the like) even when illumination is performed at 100% of the rated output. Specifically, when the LED module 31 (also referred to as daylight color LED) having a color temperature of about 5600K is lit in the daylight color tone, the brightness plus mode is started and the PWM control circuit 23 is turned on. On the other hand, the PWM pulse S1 is adjusted so that the dimming rate of the LED module 31 is 100% or more (paragraphs 0028 and 0361).

  And, paragraph 0361 of Patent Document 1 states that “when the light control rate is 100%, the current supplied to the LED module 31 can output light with an illuminance higher than the rated illuminance of the LED module 31. A certain margin is provided, for example, set at a duty ratio of about 80%, so by supplying current to the LED module 31 at a duty ratio of 100% without the margin, the dimming ratio is 100% or more. It is possible to set. Here, for example, it is assumed that the dimming rate can be set to 125%. "

  Further, paragraph 0362 of Patent Document 1 states that “the method of controlling the dimming rate of the LED module 31 in the brightness plus mode is not limited to the above, and may be a method of changing the LED drive current value. Specifically, when the dimming rate is 100%, a margin is provided by setting the current value to about 80% or less of the rated current of the LED module 31, and a value close to the rated current of the LED module 31 in the brightness plus mode. It may be controlled to turn on at a dimming rate of 100% or more by supplying a current of "."

JP 2012-043603 A

  However, as described in Patent Literature 1, when the brightness is temporarily increased further than the maximum luminous flux value (dimming rate: 100%) in the range of room brightness determined according to the number of tatami mats, If a load close to the rating is applied to the module, its life may be shortened.

  Therefore, an object of the present invention is to provide a technique for suppressing the shortening of the lifetime of the LED module when performing dimming that further increases the luminous flux from the maximum value of the luminous flux suitable for the size of the room.

  In order to solve the above-mentioned problems, an illumination device (for example, an LED illumination device) according to the present invention has two light sources having different color temperatures and two light sources suitable for the size of a room. While controlling the luminous flux of the light source and accepting an instruction of a brightness increase mode for increasing the luminous flux further than the maximum luminous flux, the two light sources are controlled so as to maintain the color temperature at the maximum luminous flux. And a control unit that executes control for increasing the luminous flux.

  ADVANTAGE OF THE INVENTION According to this invention, when performing the light control which increases a light beam further from the maximum value of the light beam suitable for the area of a room, shortening of the lifetime of an LED module can be suppressed.

It is a figure which shows the function example of a LED lighting apparatus. It is a figure which shows an example of the relationship between the color temperature implement | achieved by light control toning control, and a light beam.

  Here, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings as appropriate.

  As shown in FIG. 1, the LED illumination device (illumination device) 100 operates with power supplied from a power supply 131 (or commercial power supply) and a power supply circuit 130. The power supply circuit 130 has a function of adjusting the power of the power supply 131 to a predetermined voltage or current.

  The LED lighting device 100 includes a light receiving unit 110. The light receiving unit 110 has a function of receiving a signal (for example, infrared light) output from the remote control 120 by a button operation of the remote control 120 and transmitting the received signal to the control unit 101.

  The remote controller 120 has a button (not shown) operated by a person and has a function of outputting a signal set for the operated button.

  Next, a function example of the LED lighting device 100 will be described with reference to FIG. The LED lighting device 100 includes at least a control unit 101, two lighting circuits 102 and 103, and two LED modules (light sources) 104 and 105. In addition, description is abbreviate | omitted except the function required for description of this invention.

  The control unit 101 is a microcomputer or the like and has a function of receiving a signal received by the light receiving unit 110 and generating a control signal for controlling the lighting circuits 102 and 103. The control signal is, for example, a PWM (Pulse Width Modulation) signal. The control unit 101 is configured by a CPU (Central Processing Unit) and a main memory, and develops an application program stored in a storage unit (not shown) in the main memory to realize its function.

  The lighting circuits 102 and 103 have a function of driving the LED modules 104 and 105 based on the control signal received from the control unit 101.

  The LED modules 104 and 105 have different color temperatures. In the present embodiment, the LED module 104 has a color temperature of about 6500K. The LED module 105 has a color temperature of about 2700K. The color temperature of the LED modules 104 and 105 may not be about 6500K or 2700K as long as the color temperature of the light generated by the two LED modules 104 and 105 is a daylight white color. .

  Next, in the present embodiment, an example of the relationship between the color temperature and the light flux realized by the light adjustment toning control will be described with reference to FIG. 2 (see FIG. 1 as appropriate).

  The horizontal axis in FIG. 2 represents the color temperature (K), and the vertical axis represents the luminous flux (lm).

  The point 200 in FIG. 2 indicates the maximum value of the room brightness range determined by the Japan Lighting Industry Association according to the number of tatami mats (hereinafter, “maximum value of light flux suitable for the size of the room”). .). At point 200, the dimming rate or current value applied to the LED modules 104 and 105 has some margin with respect to its rating.

  Reference numeral 250 represents an area with dots. This area represents a range in which either or both of toning and dimming can be performed in the normal mode.

  A point 201 represents a set value set by the user within the area 250.

  A point 210 represents the light flux and the color temperature when the control unit 101 receives an instruction of a brightness increase mode for increasing the light flux further than the point 200. The color temperature at point 210 is the same as the color temperature at point 200. Since the light flux at the point 210 is realized by using the two LED modules 104 and 105, the light flux can be greatly increased even if the margin of each of the LED modules 104 and 105 is small. In other words, since the luminous flux is increased by two LED modules, the amount of increase in the dimming rate or current value per unit can be reduced compared to the case where the luminous flux is increased by the same amount in one LED module. . That is, shortening of the life of the LED module can be suppressed when dimming is performed to increase the brightness further than the maximum value of the luminous flux suitable for the size of the room.

A point 221 represents a light flux when the LED module 105 is driven alone.
A point 222 represents a light flux when the LED module 104 is driven alone.
A point 223 represents the maximum value of the light flux at the point 200, that is, the light flux suitable for the size of the room.

  A broken line arrow 230 represents characteristics of toning and dimming when the luminous flux is increased from the point 200 to the point 210. The color temperature at point 210 is the same as the color temperature at point 200. When the control unit 101 receives an instruction of the brightness increase mode, the control unit 101 executes control to increase the luminous fluxes of the two LED modules 104 and 105 so as to maintain the color temperature of the point 200 as indicated by a broken-line arrow 230. .

A broken-line arrow 231 represents a state when the control unit 101 receives an instruction for the brightness increase mode when the point 201 is set. Specifically, the control unit 101 uses the two LED modules 104 and 105 to perform color control from point 201 to point 210 and to increase the luminous flux.
A broken-line arrow 231 represents a state when the control unit 101 receives a cancel instruction to cancel the brightness increase mode when the point 210 is set. Specifically, the control unit 101 uses the two LED modules 104 and 105 to perform color control from the point 210 to the point 201 and reduce the luminous flux.

  An alternate long and short dash line arrow 241 represents characteristics when toning between the point 210 and the point 221. Specifically, the control unit 101 performs color adjustment using the LED module 105.

  An alternate long and short dash line arrow 242 represents characteristics when toning between the point 210 and the point 222. Specifically, the control unit 101 performs color adjustment using the LED module 104.

  Note that, when the luminous flux is increased from the point 201 to the point 210, the control is performed using the margin of the component. Therefore, the control unit 101 instructs the brightness increase mode after a predetermined time (for example, 30 minutes). It is preferable to return to the state (point 201) before accepting.

  As described above, the LED lighting device 100 of the present invention includes the two LED modules 104 and 105 having different color temperatures and the control unit 101. The control unit 101 controls the light fluxes of the two LED modules 104 and 105 so as to realize the maximum value of the light flux suitable for the size of the room, and instructs the brightness increase mode to increase the light flux further than the maximum light flux. Is received, control is performed to increase the luminous flux of the two LED modules 104 and 105 so that the color temperature at the maximum luminous flux is maintained. Therefore, shortening of the lifetime of the LED module can be suppressed when dimming is performed to increase the luminous flux further than the maximum value of the luminous flux suitable for the size of the room.

In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another modification, and the configuration of another modification can be added to the configuration of an embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.
Moreover, you may implement | achieve a part or all of those of the LED lighting apparatus 100 by hardware, for example by designing with an integrated circuit. Each function of the control unit 101 may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function is stored in a memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD (Digital Versatile Disc). be able to.
In addition, the control lines and information lines are those that are considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. In practice, it may be considered that almost all configurations are connected to each other.

100 LED lighting device (lighting device)
101 Control Unit 102, 103 Lighting Circuit 104 LED Module (White LED) (Light Source)
105 LED module (warm color LED) (light source)
110 light receiving unit 120 remote control 130 power supply circuit 131 power supply

Claims (5)

Two light sources with different color temperatures,
When controlling the luminous flux of the two light sources so as to realize the maximum value of the luminous flux suitable for the size of the room, and when receiving an instruction of the brightness increasing mode for increasing the luminous flux further than the luminous flux of the maximum value, A control unit that executes control to increase the luminous flux of the two light sources so as to maintain the color temperature at the maximum luminous flux;
A lighting device comprising: The controller is
After receiving the brightness increase mode instruction and increasing the luminous flux, when receiving a toning instruction for changing the color temperature, executing a control to change the luminous flux of one of the two light sources. The lighting device according to claim 1, wherein The controller is
After receiving the brightness increase mode instruction and increasing the luminous flux, when the dimming instruction to change the luminous flux is accepted, control is performed to change the luminous flux of the two light sources so as to maintain the color temperature at that time The lighting device according to claim 1. The controller is
2. The light source light source is returned to a state before receiving the brightness increase mode instruction after a predetermined time has elapsed after receiving the brightness increase mode instruction and increasing the light flux. The lighting device described. The controller is
After receiving the instruction of the brightness increase mode and increasing the luminous flux, when receiving the release instruction to cancel the brightness increase mode, the luminous flux of the light source is returned to the state before the instruction of the brightness increase mode is received. The lighting device according to claim 1, wherein the lighting device is returned.

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