WO2012043364A1 - 発光ダイオード点灯装置、照明装置および照明方法 - Google Patents
発光ダイオード点灯装置、照明装置および照明方法 Download PDFInfo
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- WO2012043364A1 WO2012043364A1 PCT/JP2011/071579 JP2011071579W WO2012043364A1 WO 2012043364 A1 WO2012043364 A1 WO 2012043364A1 JP 2011071579 W JP2011071579 W JP 2011071579W WO 2012043364 A1 WO2012043364 A1 WO 2012043364A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
Definitions
- Embodiments of the present invention relate to a light emitting diode lighting device, a lighting device, and a lighting method for dimming and lighting a light emitting diode.
- Lighting devices using light-emitting diodes as light sources are used for lighting for stage productions, studios, etc., and PWM (pulse width modulation) control is used to perform dimming control without changing the color temperature characteristics. It has been.
- dimming control by PWM control requires control of the light emitting diode lighting time and light extinguishing time, so the luminance change of the light emitting diode becomes a crisp digital thing and may appear to flicker. .
- This phenomenon is particularly noticeable in a low gradation state with low luminance.
- This phenomenon can be solved by increasing the PWM frequency. In this case, however, a highly functional microcomputer (CPU) or the like is required, so that the illumination device becomes expensive. there were.
- FIG. 1 it is a flowchart which shows the setting of the delay time in a light control part.
- FIG. 1 it is a schematic block diagram of the illuminating device which shows 3rd Embodiment of this invention.
- FIG. 1 it is a schematic front view of a light source.
- FIG. 1 it is a schematic front view of an LED lighting fixture.
- FIG. 1 is a schematic block diagram of another illuminating device.
- a light-emitting diode lighting device includes: a light source including a plurality of grouped light-emitting diodes; a plurality of lighting circuit units that individually control lighting of each grouped light-emitting diode of the light source; The dimming signal from the means is input and the output of each lighting circuit unit is controlled in accordance with the dimming signal. When the dimming gradation is changed, a plurality of dimming signals are included in one cycle. A dimming control unit that sequentially changes the output of the lighting circuit unit to a new gradation.
- the light-emitting diode lighting device of this embodiment includes a light source, a lighting circuit unit, and a dimming control unit.
- the light source is configured by grouping light emitting diodes and combining the groups.
- the lighting circuit unit individually controls the lighting of each grouped light emitting diode.
- the dimming control unit inputs the dimming signal from the dimming means that outputs the dimming signal corresponding to the dimming gradation at a predetermined cycle, and controls the output of each lighting circuit unit according to this dimming signal To do. Then, when the dimming gradation is changed, control is performed so that the outputs of the plurality of lighting circuit units are sequentially changed to new gradations within one cycle of the dimming signal.
- the light-emitting diode lighting device (LED lighting device) 1 according to the first embodiment of the present invention is configured as shown in FIG.
- the light-emitting diode lighting device 1 includes a light source 2, a lighting circuit 3 as a lighting circuit unit, and a DC power supply circuit 4.
- the light source 2 is configured by combining a plurality of groups A1 and A2 of the light emitting diodes 5.
- Each of the groups A1 and A2 includes LED circuits in which a plurality of light emitting diodes 5 are connected in series and mounted on a substrate (not shown).
- Each of the groups A1 and A2 includes a plurality.
- Each group A1, A2 of the light emitting diodes 5 is connected to an individual drive circuit 6 respectively.
- the light emitting diode 5 is formed to emit visible light, for example, white light.
- the lighting circuit 3 includes a first lighting circuit unit 7 and a second lighting circuit unit 8.
- the first and second lighting circuit units 7 and 8 are connected to the DC power supply circuit 4 and are operated by electric power supplied from the DC power supply circuit 4.
- the first lighting circuit unit 7 is associated with the group A1, and controls the lighting of the light emitting diodes 5 of each group A1.
- the second lighting circuit unit 8 is associated with the group A2 which is another group, and controls the lighting of the light emitting diodes 5 of each group A2. Since the group of the light emitting diodes 5 is composed of two groups of groups A1 and A2, one second lighting circuit unit 8 is provided and associated with one group A2.
- the second lighting circuit unit 8 is associated with each of the other groups except one group A1 associated with the first lighting circuit unit 7. It is. That is, a plurality of second lighting circuit units 8 are provided.
- the first lighting circuit unit 7 includes a PWM control circuit 9 and a drive circuit 6.
- the PWM control circuit 9 includes a storage unit 10 and a timer circuit 11.
- the PWM control circuit 9 constitutes a dimming control unit of the present embodiment together with a transmission / reception circuit 13 described later.
- the PWM control circuit 9 operates based on a program stored in the storage unit 10. That is, the PWM control circuit 9 receives a dimming signal output from an external dimming device (not shown), and turns on duty (preset PWM) corresponding to the dimming degree (0 to 100%) of the dimming signal.
- the PWM signal is generated on the basis of the PWM generation clock, and the PWM signal is output to each drive circuit 6.
- the light control level (light control gradation) of the light control signal corresponds to the light control level of the light source 2.
- the dimming signal is, for example, a DMX signal, and this PWM signal is output, for example, for 32 cycles (one cycle time 0.625 ms) within one cycle time (for example, 20 ms) of the dimming signal.
- the PWM control circuit 9 is configured to output the generated PWM signal to the second lighting circuit unit 8 after a certain delay time has elapsed.
- This delay time is, for example, a time obtained by dividing one cycle time (for example, 20 ms) of the dimming signal by the number of groups of the light emitting diodes 5.
- the number of groups is two of the groups A1 and A2, for example, 10 ms. It is.
- the timer circuit 11 measures this delay time.
- the PWM control circuit 9 when the dimming degree of the input dimming signal is changed, the PWM control circuit 9 generates a PWM signal having an on-duty corresponding to the changed dimming degree.
- the drive circuit 6 is formed mainly of the control unit 12 and is connected to the light emitting diodes 5 connected in series.
- the control unit 12 receives the PWM signal output from the PWM control circuit 9 and turns on the output of the drive circuit 6 over an on-duty period of the PWM signal.
- the light-emitting diode 5 is dimmed by the current supplied from the drive circuit 6 for each group A1 during the on-duty period of the PWM signal.
- the on-duty of the PWM signal increases, the period during which current flows through the light emitting diode 5 becomes longer, so that the dimming level (dimming rate) of the light emitting diode 5 increases.
- the dimming level of the light emitting diode 5 is 0% when the on-duty of the PWM signal is 0%, and is 100% when the on-duty of the PWM signal is 100%.
- the drive circuit 6 operates in the same manner in the second lighting circuit unit 8.
- the second lighting circuit unit 8 includes the transmission / reception circuit 13 and the drive circuit 6.
- the transmission / reception circuit 13 includes a timer circuit 14.
- the transmission / reception circuit 13 is configured to receive a PWM signal from the PWM control circuit 9 of the first lighting circuit unit 7 and to output the PWM signal to the drive circuit 6. As a result, the light-emitting diodes 5 of each group A2 are dimmed and lit at the on-duty ratio (dimming level) of the PWM signal.
- the timer circuit 14 measures the delay time (for example, 10 ms) from the time when the transmission / reception circuit 13 inputs the PWM signal.
- the transmission / reception circuit 13 outputs the PWM signal input after the delay time counted by the timer circuit 14 to one of the other second lighting circuit units 8.
- the number of groups of the light-emitting diodes 5 is two, groups A1 and A2, and the second lighting circuit unit 8 is one corresponding to the group A2, so that other PWM signals are output.
- the second lighting circuit unit 8 is not provided. Therefore, the timer circuit 14 may not be provided.
- the PWM signal is one of the other second lighting circuit sections 8 after the delay time. Are output sequentially.
- the first lighting circuit unit 7 outputs the generated PWM signal to one of the second lighting circuit units 8.
- the DC power supply circuit 4 is connected to the lighting circuit 3 and supplies power to the first and second lighting circuit units 7 and 8.
- the DC power supply circuit 4 is, for example, a rectifying / smoothing circuit obtained by rectifying and smoothing a commercial AC power supply, or a DC power supply circuit obtained by rectifying or rectifying and smoothing a commercial AC power supply and connected to the step-up chopper circuit, the step-down chopper circuit, or the step-up / step-down chopper circuit. It can be.
- the DC power supply circuit 4 may be a constant voltage source or a constant current source. Note that the DC power supply circuit 4 may be provided individually in the first and second lighting circuit portions 7 and 8.
- the PWM control circuit 9 of the first lighting circuit unit 7 outputs a PWM signal having an on-duty corresponding to the dimming level of the light-emitting diode 5 in accordance with a dimming signal output from an external dimming device, for example, a DMX signal.
- the PWM signal is generated and output to each drive circuit 6 of the first lighting circuit unit 7. That is, when a dimming signal for changing the dimming level of the light emitting diode 5 is input, the PWM control circuit 9 generates a PWM signal after the change, and sends the PWM signal after the change to each drive circuit 6. Output.
- the light-emitting diodes 5 of the group A1 are lit at the dimming level after the change from the start of one cycle period (for example, 20 ms) of the dimming signal. Visible light (white light) corresponding to the dimming level is emitted from the light emitting diodes 5 of the group A1.
- the PWM control circuit 9 outputs the generated PWM signal to the second lighting circuit unit 8 after a delay time (for example, 10 ms) counted by the timer circuit 11.
- the second lighting circuit unit 8 outputs the input PWM signal to its own drive circuit 6.
- the light-emitting diodes 5 of the group A2 are turned on at the dimming level after the change from the middle of one period of the dimming signal. From the light emitting diodes 5 of the group A2, visible light (white light) corresponding to the dimming level is emitted.
- the dimming level of the light-emitting diodes 5 of the group A1 changes with the start of one cycle time (for example, 20 ms) of the dimming signal, and the dimming level of the light-emitting diodes 5 of the group A2 changes. Since it changes after a delay time (for example, 10 ms) obtained by dividing one cycle time (for example, 20 ms) of the dimming signal by 2 that is the number of groups of the light-emitting diodes 5, the dimming level is stepwise within the one cycle time of the dimming signal Will change.
- the light source 2 as a whole becomes a smooth digital change instead of a rough digital change in luminance of the light-emitting diode 5. Therefore, when the dimming level of the light emitting diode 5 is changed, it is possible to make it difficult for a person to recognize the luminance change of the light source 2.
- the timer circuit 11 is provided in the first lighting circuit unit 7 and the PWM signal generated after the delay time is output when the dimming level is changed, the light-emitting diode lighting device 1 is inexpensive. Can be formed.
- the light source 2 is divided into the groups A1 and A2 of the light emitting diode 5.
- the present invention is not limited to this, and the light emitting diode 5 of the light source 2 may be divided into three or more groups.
- the PWM control circuit 9 of the first lighting circuit unit 7 sends the generated PWM signal to the second lighting circuit unit 8 after a delay time obtained by dividing one cycle time of the dimming signal by the number of groups of the light emitting diodes 5.
- the second lighting circuit unit 8 may be formed so as to sequentially output the PWM signal from the first lighting circuit unit 7 to the other second lighting circuit unit 8 after the delay time.
- the dimming signal input to the PWM control circuit 9 is not limited to the DMX signal, and may be an analog signal such as a voltage value signal.
- one cycle time means a unit output time of the dimming signal.
- FIG. 3 is a schematic block diagram showing another light emitting diode lighting device according to the first embodiment of the present invention. Note that the same parts as those in FIG.
- the light-emitting diode lighting device (LED lighting device) 1A shown in FIG. 3 includes the light-emitting diode lighting device 1 shown in FIG. 1 and the PWM control circuit 9 of the first lighting circuit unit 7 that does not include the timer circuit 11.
- the transmission / reception circuit 13 of the second lighting circuit unit 8 is different in that the timer circuit 14 is provided.
- the PWM control circuit 9 outputs the generated PWM signal to the drive circuit 6 of the first lighting circuit unit 7 and also to the transmission / reception circuit 13 of the second lighting circuit unit 8.
- the timer circuit 14 of the second lighting circuit unit 8 measures the time from when the transmission / reception circuit 13 inputs the PWM signal. When the timer circuit 14 measures a delay time (for example, 10 ms), the transmission / reception circuit 13 outputs the input PWM signal to the drive circuit 6 and further outputs it to the other second lighting circuit unit 8.
- the luminance change of the light emitting diode 5 of the light source 2 is not a rough digital change but a smooth digital change, similar to the light emitting diode lighting device 1 shown in FIG. Therefore, when the dimming level of the light emitting diode 5 is changed, it is possible to make it difficult for a person to recognize the luminance change of the light source 2.
- the first lighting circuit unit 7 is not provided with the timer circuit 11, but instead the timer circuit 14 provided in the second lighting circuit unit 8 measures the delay time and outputs the input PWM signal. Since it is a control structure, it has the effect that the light emitting diode lighting device 1A can be formed at low cost.
- the light-emitting diode lighting device (LED lighting device) 15 is configured as shown in FIG.
- the light emitting diode lighting device 15 in the light emitting diode lighting device 1 shown in FIG. 1, portions corresponding to the PWM control circuit 9 and the transmission / reception circuit 13 are formed as the dimming control unit 16, and the dimming control unit 16 is controlled.
- a first lighting circuit unit 17 is formed by connecting to the driving circuit 6 including the unit 12. Further, another driving circuit 6 having the control unit 12 is connected to the dimming control unit 16 to form a second lighting circuit unit 18. That is, the lighting circuit 19 is formed by the dimming control unit 16 and the first and second lighting circuit units 17 and 18.
- Other configurations are the same as those of the light-emitting diode lighting device 1 shown in FIG.
- the lighting circuit 19 is connected to the DC power supply circuit 4, and the dimming control unit 16, the first lighting circuit unit 17, and the second lighting circuit unit 18 are each operated by electric power supplied from the DC power supply circuit 4. .
- the dimming control unit 16 is formed of, for example, a microcomputer, and includes a main control unit 20 having a CPU (Central Processing Unit), a ROM 21, a RAM 22, a storage unit 23, and a timer circuit unit 24.
- a main control unit 20 having a CPU (Central Processing Unit), a ROM 21, a RAM 22, a storage unit 23, and a timer circuit unit 24.
- this structure is an example, Comprising: It is not limited to this.
- the main control unit 20 performs a control operation based on a program stored in the ROM 21. That is, the main control unit 20 inputs the dimming signal output from the dimming device 25 as an external dimming unit via an input unit (not shown), and the dimming gradation (0 to 100) of the dimming signal %) Is generated based on the PWM generation clock, and this PWM signal is output to the first and second lighting circuit sections 17 and 18, respectively.
- the light control gradation (light control level) of the light control signal corresponds to the light control level of the light source 2.
- the dimming signal is a DMX signal, for example, and has 0 to 255 gradations.
- the light control device 25 outputs a light control signal (DMX signal) having a light control gradation corresponding to the light control level (light control rate) of the light emitting diode 5.
- the one-cycle time of the dimming signal varies depending on the manufacturer and model, and is 20 ⁇ s to 3 s. In the present embodiment, it is assumed that a dimming signal having a period time of 20 ms is output from the dimming device 25. Therefore, the main control unit 20 of the dimming control unit 16 controls the PWM signal so as to output, for example, 32 cycles (one cycle time 0.625 ms) within one cycle time (20 ms) of the dimming signal.
- the main control unit 20 when the main control unit 20 generates the PWM signal, the main control unit 20 immediately outputs the PWM signal to the first lighting circuit unit 17, and outputs the PWM signal to the second lighting circuit unit after a preset delay time has elapsed. 18 is formed so as to output to 18.
- This delay time is, for example, a time obtained by dividing one cycle time (20 ms) of the dimming signal by the number of groups of the light-emitting diodes 5.
- the number of groups is two of the groups A1 and A2, for example, 10 ms. is there.
- the delay time is stored in the nonvolatile storage unit 23.
- the delay time is counted by the timer circuit unit 24.
- step S1 when the dimming signal output from the dimming device 25 is input (step S1), the main control unit 20 generates a PWM signal corresponding to the dimming gradation of the dimming signal (step S2). ). Then, the generated PWM signal is output to the first lighting circuit unit 17 (step S3).
- each drive circuit 6 is turned on over an on-duty period of the PWM signal, and supplies current to each LED circuit.
- the light-emitting diodes 5 of the group A1 are lit at a dimming level (dimming rate) corresponding to the dimming gradation (dimming degree) of the dimming signal.
- the main control unit 20 compares the dimming gradation levels of the dimming signal input this time and the dimming signal input immediately before, and determines whether there is a change (step S4).
- the dimming gradation of the dimming signal input immediately before is stored in the RAM 22. Therefore, the dimming gradation of the dimming signal input this time is stored in the RAM 22. If the dimming gradation has not changed, the generated PWM signal is output to the second lighting circuit unit 18 (step S8).
- each drive circuit 6 is turned on over the period of the on-duty of the PWM signal, and supplies a current to each grouped LED circuit.
- the light-emitting diodes 5 of the group A2 are lit at a dimming level (dimming rate) corresponding to the dimming gradation (dimming degree) of the dimming signal.
- step S4 when the dimming gradation of the dimming signal input this time has changed with respect to the dimming signal input immediately before, the delay time is read from the storage unit 23 (step S5), for example, The timer circuit unit 24 measures the elapsed time from the determination time (step S6).
- the main control unit 20 when the dimming gradation of the input dimming signal is changed, the main control unit 20 generates a PWM signal having an on-duty corresponding to the changed dimming gradation.
- step S7 When the elapsed time measured by the timer circuit unit 24 reaches the delay time (10 ms) read from the storage unit 23 (step S7), the main control unit 20 sends the generated PWM signal to the second lighting circuit unit 18. Output (step S8).
- the second lighting circuit unit 18 receives the PWM signal after a certain delay time has elapsed since the first lighting circuit unit 17 input the PWM signal. As a result, the light-emitting diodes 5 in the group A2 are turned on at a new and changed light control level (light control rate) after a certain delay time than the light-emitting diodes 5 in the group A1.
- the main control unit 20 (the dimming control unit 16) inputs the dimming signal from the dimming device 25, and the first and second lighting circuit units 17 and 18 according to the dimming signal. Control the output.
- the dimming gradation of the input dimming signal changes, the outputs of the first and second lighting circuit units 17 and 18 are output within one cycle time (one cycle, 20 ms) of the dimming signal. Control is performed so as to sequentially change to a new gradation.
- the dimming control unit 16 of the lighting circuit 19 generates a PWM signal having an on-duty corresponding to the dimming level of the light emitting diode 5 in accordance with the dimming signal (DMX signal) output from the dimming device 25.
- the PWM signal is output to the drive circuits 6 of the first and second lighting circuit units 17 and 18.
- the dimming control unit 16 when a dimming signal for changing the dimming level of the light emitting diode 5 is input, the dimming control unit 16 generates a PWM signal after the change and supplies the PWM circuit to each drive circuit 6 of the first lighting circuit unit 17.
- the PWM signal after this change is output.
- the light emitting diodes 5 of the group A1 are lit at the dimming level after the change from the start of one cycle time (for example, 20 ms) of the dimming signal. Visible light (white light) corresponding to the dimming level is emitted from the light emitting diodes 5 of the group A1.
- the dimming control unit 16 outputs the generated PWM signal to each drive circuit 6 of the second lighting circuit unit 18 after a delay time (for example, 10 ms) timed by the timer circuit unit 24.
- a delay time for example, 10 ms
- the light-emitting diodes 5 of the group A2 are lit at the dimming level after the change from the middle of one cycle time of the dimming signal. From the light emitting diodes 5 of the group A2, visible light (white light) corresponding to the dimming level is emitted.
- the light control level of the light emitting diodes 5 of the group A1 changes with the start of one cycle time (for example, 20 ms) of the light control signal, and the light emission of the group A2 Since the dimming level of the diode 5 changes after a delay time (for example, 10 ms) obtained by dividing one cycle time (for example, 20 ms) of the dimming signal by 2 which is the number of groups of the light emitting diodes 5, The dimming level changes gradually. As a result, the light source 2 as a whole becomes a smooth digital change instead of a rough digital change in luminance of the light-emitting diode 5. Therefore, when the dimming level of the light emitting diode 5 is changed, it is possible to make it difficult for a person to recognize the luminance change of the light source 2.
- This second control further has a function of allowing the main control unit 20 of the dimming control unit 16 to set a time for changing the dimming level step by step in the light emitting diode lighting device 15 shown in FIG.
- the dimming device 25 has a cycle time of 1.2 s (or 0.6 s) for the dimming signal to be output, and the dimming signal is stored in the storage unit 23 of the dimming control unit 16. It is assumed that a delay time of 600 ms (or 300 ms) obtained by dividing the cycle time (1.2 s) (or 0.6 s) by 2 that is the number of groups of the light-emitting diodes 5 is stored.
- step S4 when the dimming gradation of the dimming signal input this time has changed with respect to the dimming gradation of the dimming signal input immediately before (step S4), the main control unit 20 adjusts those dimming gradations.
- a light gradation change amount (difference) is calculated (step S9). Then, apart from the delay time (600 ms) (or 300 ms) read from the storage unit 23, the first delay time to the fourth delay time corresponding to the amount of change in the light control gradation are set (steps S10 to S10). Step S16).
- the set value 63 is the ratio of the 256 levels of the 256 gray levels of the DMX signal, and means that the change in the light control level increases as the set value increases. The same applies to the following set values.
- the second delay time is set to 400 ms (or 200 ms), for example. If the change amount of the light control gradation is less than the third set value, for example, 191 (127 to 190) (step S12), the third delay time is set to 200 ms (or 100 ms), for example (step S15). .
- the fourth delay time is, for example, 0 ms or a value close to 0 ms as much as possible (approximately 0 ms).
- the first to fourth delay times are gradually reduced from the delay time (600 ms) (or 300 ms) stored in the storage unit 23 as the amount of change in the light control gradation increases. Yes.
- step S6 the delay time set according to the amount of change in the light control gradation is counted by the timer circuit unit 24 (step S6), and the main control unit 20 performs the second lighting on the PWM signal generated after the delay time. Output to the circuit unit 18.
- the light-emitting diodes 5 of the group A2 are dimmed according to the dimming gradation after the delay time corresponding to the change amount of the dimming gradation with respect to the light-emitting diodes 5 of the group A1. Lights at level (dimming rate).
- the light-emitting diodes 5 of the group A1 are dimmed and lighted almost simultaneously with the generation of the PWM signal, and the light-emitting diodes 5 of the group A2 Dimming is performed approximately after the first delay time (600 ms) (or 300 ms) after the signal is generated.
- the change amount of the light control gradation is equal to or greater than the first set value 63 and less than the second set value 127, the light is dimmed and turned on after the second delay time (400 ms) (or 200 ms). If the amount of change in the light gradation is greater than or equal to the second set value 127 and less than or equal to the third set value 191, dimming is similarly performed after the third delay time (200 ms) (or 100 ms). Then, if the amount of change in the light control gradation is equal to or greater than the fourth set value 191, the light is turned on after the fourth delay time (approximately 0 ms).
- the light-emitting diodes 5 of the groups A1 and A2 are turned on stepwise at a dimming level (dimming rate) corresponding to the dimming gradation of the dimming signal, and the light-emitting diodes 5 of the group A2 are dimmed.
- the delay time is shortened and the light control level is shifted to a predetermined light control level.
- the light-emitting diode 5 is not concerned with flickering even when the luminance change at the time of changing the light control level is a rough digital change when the amount of change of the light control level is large.
- the dimming control unit 16 outputs the first and second lighting circuit units 17 and 18 according to the amount of change in the dimming gradation of the dimming signal input from the dimming device 25. Since the time (delay time) for sequentially changing the light source 2 is made variable, it is possible to make it difficult for a person to recognize the luminance change of the light source 2 when the dimming level of the light emitting diode 5 is changed. As the amount of change in the light control level increases, the light can be turned on at a light control level corresponding to the light control gradation of the light control signal as soon as possible.
- the light emitting diodes 5 are divided into two groups, and the delay time and the first delay time stored in the storage unit 23 are one cycle time (1.2 s) (or 0.6 s) of the dimming signal. ) Divided by the number of groups 2 (600 ms) (or 300 ms).
- the delay time is smaller than, for example, 600 ms (or 300 ms). It is desirable that the accumulated delay time after the second lighting circuit section 18 is 600 ms (or 300 ms).
- FIG. 8 shows another control (third control) in the second embodiment. That is, the main control unit 20 of the dimming control unit 16 has a function of setting a delay time according to the cycle of the dimming signal output from the dimming device 25. As described above, the dimming device 25 has a period of one dimming signal of 20 ⁇ s to 3 s depending on the manufacturer, model, etc.
- step S21 when the dimming signal is input (step S21), the main control unit 20 reads the delay time stored in the storage unit 23 (step S22), and uses the cycle time of the dimming signal as a reference.
- a set value of one cycle time, for example, 1.2 s is compared (step S23). And if one cycle time of a light control signal is more than a setting value (1.2 s), the delay time (for example, 600 ms) memorize
- the dimming control unit 16 determines the dimming gradation of the dimming signal.
- the timing of outputting the generated PWM signal to the second lighting circuit unit 18 is delayed by the delay time (600 ms) stored in the first lighting circuit unit 17.
- the main control part 20 will set a delay time (for example, 600 ms) to a new delay time if the one cycle time of the dimming signal is less than the set value (1.2 s) (step S24).
- the new delay time can be, for example, a time obtained by dividing one cycle time of the dimming signal by the number of groups of the light emitting diodes 5.
- the newly set delay time is stored in the storage unit 23. Thereby, after that, when the dimming gradation of the dimming signal changes, the dimming control unit 16 newly sets a delay time from the time when the generated PWM signal is output to the first lighting circuit unit 3. After the elapse of time, it is output to the second lighting circuit unit 4.
- the dimming controller 16 sequentially changes the outputs of the first and second lighting circuit units 17 and 18 according to the period of the dimming signal input from the dimmer 25 (delay). Time) is variably controlled.
- a dimming device 25 of a different manufacturer or model is connected to the light emitting diode lighting device 15, when the dimming level of the light emitting diode 5 is changed, a person can recognize the luminance change of the light source 2. It can be made difficult, and when the amount of change in the light control level is large, it can be turned on at a light control level corresponding to the light control gradation of the light control signal. Further, it is possible to automatically set a time (delay time) for sequentially changing the output of the second lighting circuit unit 18 from the output time of the first lighting circuit unit 17, thereby saving labor. Have.
- FIG. 9 to 13 show a third embodiment of the present invention.
- FIG. 9 is a schematic block diagram of a lighting device
- FIG. 10 is a schematic front view of a light source
- FIG. 11 is a schematic front view of an LED lighting apparatus
- FIG. 13 is a schematic block diagram of another lighting device. The same parts as those in FIG. 1 and FIG.
- the lighting device 31 includes a light control device 25 as a light control unit, the light-emitting diode lighting device 1 and the LED lighting device 32 shown in FIG. 1.
- the light control device 25 is a light control table, for example, and transmits a DMX signal that is a light control signal of 256 gradations, for example.
- This DMX signal is a digital signal used in a production field or the like standardized by the American Theater Technology Association (USITT), and indicates the DMX 512 used as a standard of a dimming signal for dimming control.
- the dimmer 25 transmits a DMX signal with a period of 20 ms, for example.
- the LED lighting fixture 32 includes an appliance main body 33 in which the light source 2 is disposed. As shown in FIG. 12, the LED lighting fixture 32 is configured, for example, as a spotlight, and the fixture main body 33 includes a light source unit 34 and a lens unit 35.
- the light source unit 34 emits light emitted from the light emitting diode 5.
- the lens unit 35 includes projection lenses 36a and 36b that collect light and project the light outside. As shown in FIG. 11, the light emitted from the light source unit 34 is transmitted through a light transmitting portion 37 provided in front of the lens unit 35 and is projected onto an illumination target.
- the instrument main body 33 is attached to the arm 38 attached to constructions, such as a ceiling, so that a projection direction is rotatable.
- the light source unit 34 includes a light source 2 that is a planar light source, and heat generated in the light source 2 is radiated to an external space by a radiator (not shown).
- the light source unit 34 includes a power supply unit 39 that supplies lighting power to the light source 2, a control unit 40 that controls lighting of the light source 2, a cylindrical optical path 41, and the like.
- the power supply unit 39 is provided with the drive circuit 6 and the DC power supply circuit 4 of the light emitting diode lighting device 1 shown in FIG.
- the PWM control circuit 9 and the transmission / reception circuit 13 are formed by electronic components mounted on the circuit board 42.
- a transmission line (not shown) is connected to the circuit board 42, and the control unit 40 inputs the dimming signal transmitted from the dimming device 25 via the transmission line.
- the cylindrical optical path 41 guides light from the light source 2 to the lens unit 35.
- the light source 2 has a plurality of chip-like light emitting diodes 5 mounted on a flat printed board 43.
- the light emitting diode 5 that emits white light is used.
- a light emitting diode 5 that emits red, green, and blue light may be used for complementary colors.
- the light source 2 includes a plurality of light emitting diodes 5 connected in series and is grouped into a plurality of LED circuits 44 arranged in a rectangular shape.
- the plurality of LED circuits 44 are configured such that a light emitting area approximates to a virtual circle 45 by combining a plurality of LED circuits 44.
- the light source 2 is grouped into 10 LED circuits 46a to 46j.
- Each LED circuit 46a to 46j has a power supply terminal 47a to 47j individually, and lighting power is supplied from the power supply unit 39 to the power supply terminals 47a to 47j by the lighting control of the control unit 40.
- the light emitting diodes 5a to 46j are turned on.
- the LED circuits 46a to 46j are formed by arranging a plurality of light emitting diodes 5 in a rectangular shape, but are classified into three types having different arrangements and different sizes. Each of the LED circuits 46a to 46j has the same rectangular short side length, and seven light emitting diodes 5 are connected in series in the direction of the short side. It is connected.
- the LED circuits 46c and 46h at the center of the light source 2 are the longest group having the longest rectangular side, and the LED circuits 46a, 46e, 46f and 46j at the both ends have the shortest long side.
- LED circuits 46b, 46d, 46g, and 46i in the middle portion between the longest group and the shortest group are intermediate groups having a rectangular long side having an intermediate length.
- the LED circuit 46a, 46c, 46e, 46g, 46i forms the group A1 of the light emitting diode 5 shown in FIG. 1, and the LED circuit 46b, 46d, 46f, 46h, 46j forms the group A2 of the light emitting diode 5. Has been.
- the illuminating device 31 includes the light emitting diode lighting device 1, the illuminating device 31 can be formed at low cost, and the dimming level of the light source 2 of the LED lighting fixture 32 is PWMed by the dimming signal transmitted from the dimming device 25. It can be changed with a signal. Furthermore, it has an effect that it is difficult to recognize the luminance change when the light control level is changed, and to make it difficult for a person to recognize.
- FIG. 13 shows another example of a lighting device according to the third embodiment of the present invention.
- the lighting device 51 is obtained by using the light emitting diode lighting device 15 shown in FIG. 4 in place of the light emitting diode lighting device 1 in the lighting device 31 shown in FIG.
- the lighting device 51 has the same operations and effects as the lighting device 31 shown in FIG.
- the dimming control unit inputs the dimming signal from the dimming means, controls the output of each lighting circuit unit according to the dimming signal, and controls the dimming level.
- the dimming changes the output of the plurality of lighting circuit units is sequentially changed to a new gradation within one cycle of the dimming signal, so that the light source responds to the dimming signal when the dimming level is changed.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims (5)
- グループ化された複数個の発光ダイオードからなる光源と;
この光源の各グループ化された発光ダイオードを個別に点灯制御する複数個の点灯回路部と;
調光手段からの調光信号を入力して、この調光信号に応じて各点灯回路部の出力を制御するとともに、調光階調が変化した場合には調光信号の一周期内において複数個の点灯回路部の出力を順次新たな階調に変更する調光制御部と;
を具備していることを特徴とする発光ダイオード点灯装置。 - 前記調光制御部は、調光手段から入力される調光信号の調光階調の変化量に応じて前記各点灯回路部の出力を順次変更する時間が変更可能に形成されていることを特徴とする請求項1記載の発光ダイオード点灯装置。
- 前記調光制御部は、調光手段から入力される調光信号の周期に応じて前記各点灯回路部の出力を順次変更する時間が変更可能に形成されていることを特徴とする請求項1または2記載の発光ダイオード点灯装置。
- 調光階調に応じた調光信号を所定の周期で出力する調光手段と;
この調光手段から送信された調光信号の調光階調に応じて光源を調光点灯する請求項1ないし3いずれか一記載の発光ダイオード点灯装置と;
この発光ダイオード点灯装置の光源を配設している器具本体を有するLED照明器具と;
を具備していることを特徴とする照明装置。 - グループ化された複数個の発光ダイオードからなる光源と、各グループ化された発光ダイオードを個別に点灯制御する複数個の点灯回路部とを備え、調光信号を各点灯回路部に入力するステップと、この調光信号に応じて各点灯回路部の出力を制御するステップと、前記調光信号に対応する調光階調が変更された場合に前記調光信号の一周期内において前記複数個の点灯回路部の出力を順次新たな階調に変更するステップとを具備したことを特徴とする照明装置の照明方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012536385A JP5605723B2 (ja) | 2010-09-30 | 2011-09-22 | 発光ダイオード点灯装置、照明装置および照明方法 |
KR1020137004809A KR101482895B1 (ko) | 2010-09-30 | 2011-09-22 | 발광다이오드 점등장치, 조명장치 및 조명방법 |
US13/820,991 US20130278156A1 (en) | 2010-09-30 | 2011-09-22 | Light-emitting diode lighting apparatus, illuminating apparatus and illuminating method |
EP11828921.4A EP2624665A1 (en) | 2010-09-30 | 2011-09-22 | Device for lighting light-emitting diode, illumination device, and illumination method |
Applications Claiming Priority (4)
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JP2010-222275 | 2010-09-30 | ||
JP2010222275 | 2010-09-30 | ||
JP2011-176664 | 2011-08-12 | ||
JP2011176664 | 2011-08-12 |
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PCT/JP2011/071579 WO2012043364A1 (ja) | 2010-09-30 | 2011-09-22 | 発光ダイオード点灯装置、照明装置および照明方法 |
Country Status (5)
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US (1) | US20130278156A1 (ja) |
EP (1) | EP2624665A1 (ja) |
JP (1) | JP5605723B2 (ja) |
KR (1) | KR101482895B1 (ja) |
WO (1) | WO2012043364A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101648788B1 (ko) * | 2015-12-28 | 2016-08-18 | 엘이디라이팅 주식회사 | 상관색온도 제어와 광속제어 조정장치를 사용하여 상관색온도 변환과 동일한 조도 유지가 가능한 색온도, 조도변환 led조명기구 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9322538B2 (en) * | 2013-10-28 | 2016-04-26 | Yau-Chin Peng | Structure of LED light set |
CN103747569B (zh) * | 2013-12-25 | 2015-11-25 | 矽力杰半导体技术(杭州)有限公司 | 一种pwm调光控制方法、控制电路及应用其的led驱动电路 |
WO2015153147A1 (en) * | 2014-04-04 | 2015-10-08 | Lumenpulse Lighting Inc. | System and method for powering and controlling a solid state lighting unit |
US11778715B2 (en) | 2020-12-23 | 2023-10-03 | Lmpg Inc. | Apparatus and method for powerline communication control of electrical devices |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0668704A (ja) * | 1992-08-24 | 1994-03-11 | Matsushita Electric Works Ltd | 調光装置 |
JPH09251893A (ja) * | 1996-03-15 | 1997-09-22 | Matsushita Electric Works Ltd | 照明装置 |
JP2010198760A (ja) * | 2009-02-23 | 2010-09-09 | Panasonic Electric Works Co Ltd | Led調光点灯装置及びそれを用いたled照明器具 |
JP2010222275A (ja) | 2009-03-23 | 2010-10-07 | Michiharu Sasaki | 糖尿病者用ドリンク剤 |
JP2011176664A (ja) | 2010-02-25 | 2011-09-08 | Sharp Corp | プルダウン検出装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100810516B1 (ko) * | 2005-07-01 | 2008-03-10 | 삼성전자주식회사 | 부하 구동장치 및 그 부하 구동방법 |
-
2011
- 2011-09-22 EP EP11828921.4A patent/EP2624665A1/en not_active Withdrawn
- 2011-09-22 KR KR1020137004809A patent/KR101482895B1/ko not_active IP Right Cessation
- 2011-09-22 JP JP2012536385A patent/JP5605723B2/ja not_active Expired - Fee Related
- 2011-09-22 WO PCT/JP2011/071579 patent/WO2012043364A1/ja active Application Filing
- 2011-09-22 US US13/820,991 patent/US20130278156A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0668704A (ja) * | 1992-08-24 | 1994-03-11 | Matsushita Electric Works Ltd | 調光装置 |
JPH09251893A (ja) * | 1996-03-15 | 1997-09-22 | Matsushita Electric Works Ltd | 照明装置 |
JP2010198760A (ja) * | 2009-02-23 | 2010-09-09 | Panasonic Electric Works Co Ltd | Led調光点灯装置及びそれを用いたled照明器具 |
JP2010222275A (ja) | 2009-03-23 | 2010-10-07 | Michiharu Sasaki | 糖尿病者用ドリンク剤 |
JP2011176664A (ja) | 2010-02-25 | 2011-09-08 | Sharp Corp | プルダウン検出装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101648788B1 (ko) * | 2015-12-28 | 2016-08-18 | 엘이디라이팅 주식회사 | 상관색온도 제어와 광속제어 조정장치를 사용하여 상관색온도 변환과 동일한 조도 유지가 가능한 색온도, 조도변환 led조명기구 |
Also Published As
Publication number | Publication date |
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KR101482895B1 (ko) | 2015-01-14 |
US20130278156A1 (en) | 2013-10-24 |
KR20130066666A (ko) | 2013-06-20 |
JPWO2012043364A1 (ja) | 2014-02-06 |
JP5605723B2 (ja) | 2014-10-15 |
EP2624665A1 (en) | 2013-08-07 |
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