CN102752906A - Lighting device and illumination apparatus having the same - Google Patents
Lighting device and illumination apparatus having the same Download PDFInfo
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- CN102752906A CN102752906A CN2012100886719A CN201210088671A CN102752906A CN 102752906 A CN102752906 A CN 102752906A CN 2012100886719 A CN2012100886719 A CN 2012100886719A CN 201210088671 A CN201210088671 A CN 201210088671A CN 102752906 A CN102752906 A CN 102752906A
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- 230000001276 controlling effect Effects 0.000 description 14
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- 230000008859 change Effects 0.000 description 5
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
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Abstract
A lighting device includes: a power supply unit for supplying a power to a light emitting element,and a dimming control unit for controlling the power supply unit in according to a control signal inputted from outside to dimming-control the light emitting element at a desired dimming ratio. The dimming control unit controls the power supply unit so that supply of the power from the power supply unit to the light emitting element is stopped when no control signal is inputted.
Description
Technical field
The present invention relates to the lighting device that is used for the apparatus for lighting of lighting elements and has said apparatus for lighting.
Background technology
The lighting device that in for example shop etc., uses comprises that having the output of depending on apparatus for lighting lights such as the light-emitting component of LED (light-emitting diode), OLED (Organic Light Emitting Diode) or the like and change the known lighting device of dimming function of the light output of said light-emitting component arbitrarily.In such lighting device, apparatus for lighting receives from depending on such as the light modulation of switch on wall and controls controlling of unit and generate the control signal of the control appliance of control signal and this light-emitting component of brightness adjustment control.Usually; In such lighting device; The user controls switch on wall etc., so that to the control appliance power supplied, in order to generate said control signal simultaneously to this apparatus for lighting power supplied (for example referring to the open No.2009-232625 (JP2009-232625A) of Japanese patent application).
When after the lighting device power supplied, immediately control signal being input to apparatus for lighting, can not encounter problems.Yet the input that control signal can take place is from starting the situation of this apparatus for lighting delay.The apparatus for lighting that is used to have the typical discharge lamp of filament is set to: in order after power supplied, to preheat said filament immediately in advance, need the scheduled time to be used for starting and said discharge lamp was not switched in the said scheduled time.Therefore, even the input of control signal is postponed also particular problem can not take place.Yet, at the apparatus for lighting that is used for such as the light-emitting component of LED, after power supplied, start said circuit immediately, do not preheat and do not carry out.Therefore, when the input of control signal is postponed, exist in the light-emitting component modulated light and control to before the expectation light output, this light-emitting component only will connect fully a moment and then brightness adjustment control with the possibility that is performed.
Therefore; In JP2009-232625A in the disclosed lighting device; The signal (dim signal) of in back to back predetermined amount of time after apparatus for lighting (power cell) power supplied, temporarily removing controls, thereby avoided after starting, taking place immediately the situation of on-state (complete illuminating state) fully in a moment.And JP2009-232625A is also open through exporting the operation of turn-offing said light-emitting component based on reference signal control DC during the said predetermined amount of time of the signal of removing controls at apparatus for lighting.
Yet; In JP2009-232625A in the disclosed apparatus for lighting; Because control signal only is cancelled in the back to back predetermined amount of time after the power supply; Therefore have following possibility: promptly, if even said control signal is not transfused to yet when the power supply begins to have passed through said predetermined amount of time, light-emitting component can be connected the situation in a moment in light modulation before the output of expectation light fully.And, be set at said predetermined amount of time and be longer than when power is fed to time period of maximum delay time of output of control signal, because the time of delay of each control appliance can be significantly different, therefore said predetermined amount of time can unnecessarily be prolonged.As a result, the startup of apparatus for lighting is postponed.
Summary of the invention
Therefore; The present invention provides a kind of apparatus for lighting and the lighting device with said apparatus for lighting; Can avoid light-emitting component only to connect the phenomenon in a moment before the expectation light output fully, even and can prevent that also the startup of apparatus for lighting from being postponed when in the scope of the output that is fed to control signal of power, changing the time of delay of each control appliance in light modulation definitely.
According to an aspect of the present invention, provide a kind of apparatus for lighting to comprise: to be used for power feeding unit to the light-emitting component power supplied; And be used for coming the power controlling supply single, thereby carry out the dimming control unit of brightness adjustment control with expectation light modulation comparison light-emitting component according to the control signal of input from the outside.Said dimming control unit power controlling feeding unit is not so that stop from the power feeding unit to the light-emitting component power supplied when having the control signal input.
Said dimming control unit can be configured to when control signal is imported, carry out brightness adjustment control with the light modulation comparison light-emitting component corresponding to control signal.
Said dimming control unit can compare brightness adjustment control voltage and the voltage that is detected; And said power feeding unit is preferably supplied said power to said light-emitting component when the voltage that is detected is lower than said brightness adjustment control voltage; And said power feeding unit preferably stops to supply said power to said light-emitting component when the voltage that is detected equals or be higher than said brightness adjustment control voltage; And wherein certain bias voltage is applied to the voltage that is detected and is lower than said brightness adjustment control voltage to prevent the voltage that when said control signal is not imported, is detected; And the amplitude of wherein said brightness adjustment control voltage is confirmed that by said control signal the voltage indication that is detected is from the intensity of said power feeding unit to the power of said light-emitting component supply.
The duty ratio of said control signal can change according to the desired value of said light modulation ratio, and the said amplitude of said brightness adjustment control voltage changes according to the said duty ratio of said control signal.
Here, along with the said duty ratio of said control signal becomes littler, the said amplitude of said brightness adjustment control voltage becomes littler.
According to a further aspect in the invention, a kind of lighting device is provided, comprises: above-mentioned apparatus for lighting; And luminescence unit with said light-emitting component.
The invention has the advantages that it and can avoid before the light modulation that controls to expectation light output light-emitting component to connect the only phenomenon in a moment fully definitely, even and in the scope of the output that is fed to control signal of power, exist significantly in the time of delay of each control appliance and can not prevent also simultaneously that the startup of apparatus for lighting from being postponed.
Description of drawings
The description of the following embodiment that provides in conjunction with the drawings, the object of the invention and characteristic will become obviously, in the accompanying drawings:
Fig. 1 is the circuit diagram that illustrates according to the configuration of the major part of the lighting device of the embodiment of the invention;
Fig. 2 is the circuit diagram that illustrates according to the configured in one piece of the lighting device of the embodiment of the invention;
Fig. 3 illustrates the operation according to the reverse excitation circuit of the lighting device of the embodiment of the invention; And
Fig. 4 illustrates the operation according to the adjusting control circuit of the lighting device of the embodiment of the invention.
Embodiment
Below, will embodiments of the invention be described with reference to the accompanying drawing that constitutes the present invention's part.
As shown in Figure 2, comprise luminescence unit 1 and apparatus for lighting 2 according to the lighting device 10 of the embodiment of the invention.Lighting device 10 has the dimming function that can change the light output that comes selfluminous cell 1 arbitrarily.Lighting device 10 receives from depending on such as the light modulation of switch on wall and controls controlling of unit and generate the control signal of the control appliance (not shown) of control signal and brightness adjustment control luminescence unit 1.Usually, in such lighting device 10, the user controls switch on wall etc. so that when generating the control appliance power supplied of control signal to apparatus for lighting 2 power supplied.
Apparatus for lighting 2 has reverse excitation circuit 20 as the power feeding unit, and through connecting luminescence unit 1 from reverse excitation circuit 20 to light-emitting component 11 power supplied of luminescence unit 1.Luminescence unit 1 for example is implemented as the series circuit of a plurality of light-emitting components 11.Here, each light-emitting component refers to such as being supplied with the element of power with radiative LED (light-emitting diode), OLED (Organic Light Emitting Diode) etc.In the present embodiment, use LED as light-emitting component 11.
Apparatus for lighting 2 comprises the filter circuit 21 that is connected to AC power source (commercial power source) 3, be embodied as and be used for preventing that to the rectifier 22 of the diode bridge that carries out rectification from the output of filter circuit 21 and via inrush current circuit 23 is connected to the boost chopper circuit 24 from the output of rectifier 22.Reverse excitation circuit 20 is provided in the level of boost chopper circuit 24 and then, and is configured to receive the dc voltage that boosts through boost chopper circuit 24 is applied to luminescence unit 1 with generation as input dc voltage.
And apparatus for lighting 2 comprises the power controlling feeding unit 25 (will be described later) that is used to generate the power that is used for chopper control unit 240 and inverse-excitation type control unit 200, adjusting control circuit 26 that can brightness adjustment control luminescence unit 1 and the feedback circuit 27 that is used to feed back the output of selfluminous cell 1.Although the back will provide detailed description, adjusting control circuit 26 is in response to controlling reverse excitation circuit 20 from the control signal of external equipment (control appliance) input, thus with the light modulation of expectation than brightness adjustment control luminescence unit 1.
Except chopper control unit 240; Boost chopper circuit 24 also has the capacitor 241 between the input terminal that is connected boost chopper circuit 24; And the series circuit that comprises the chopper choke 242 and first switch element 243, said series circuit is connected between the two ends of capacitor 241.Here, first switch element 243 is embodied as N-channel MOS FET (mos field effect transistor).And then boost chopper circuit 24 has diode 244 and the series circuit of electrolytic capacitor 245 between the two ends that are connected first switch element 243 (drain electrode and source electrode).One end of chopper choke 242 is connected to the link node that inrush current prevents circuit 23 and capacitor 241, and the other end of chopper choke 242 is connected to the anode of diode 244.Chopper control unit 240 is connected to the grid of first switch element 243.
In this case, chopper control unit 240 is in response to carrying out switching controls from the output of the primary side of chopper choke 242 with conducting or turn-off first switch element 243.Therefore; Boost chopper circuit 24 during the conducting period of first switch element 243 in chopper choke 242 stored energy, and during the shutoff period of first switch element 243 with from the energy of chopper choke 242 via 245 chargings of 244 pairs of electrolytic capacitors of diode.As a result, (place, two ends of electrolytic capacitor 245) generates the expectation dc voltage that the peak value according to AC voltage boosts at the lead-out terminal place of boost chopper circuit 24.
Except inverse-excitation type control unit 200, second switch element 202, diode 203, electrolytic capacitor 204 and resistor 205 that reverse excitation circuit 20 also comprises inverse-excitation type transformer 201, utilizes N-channel MOS FET to realize.The primary coil of inverse-excitation type transformer 201 and second switch element 202 are connected in series between the lead-out terminal of boost chopper circuit 24.Diode 203, electrolytic capacitor 204 and resistor 205 are connected in series with the secondary coil of inverse-excitation type transformer 201.Luminescence unit 1 is connected between the two ends of electrolytic capacitor 204, and the link node of the secondary coil of resistor 205 and inverse-excitation type transformer 201 is connected to the ground of this circuit.Inverse-excitation type control unit 200 is connected to the grid of second switch element 202.
In this case, inverse-excitation type control unit 200 detect the inverse-excitation type transformer 201 of flowing through primary side electric current and carry out switching controls in response to the electric current that is detected with conducting or turn-off second switch element 202.Therefore; When 202 conductings of second switch element; Reverse excitation circuit 20 stores the energy in the inverse-excitation type transformer 201, and when second switch element 202 turn-offed, reverse excitation circuit 20 utilized the energy that is stored in the inverse-excitation type transformer 201 via 204 chargings of 203 pairs of electrolytic capacitors of diode.As a result, locate to generate level and smooth dc voltage at the lead-out terminal (two ends of electrolytic capacitor 204) of reverse excitation circuit 20.When this dc voltage was applied to luminescence unit 1, luminescence unit 1 was connected.
Next, the operation of reverse excitation circuit 20 will be described with reference to Fig. 3.Fig. 3 illustrates the drain electrode-source voltage Vds of (a) second switch element 202, (b) the drain current Id of second switch element 202, and (c) the output voltage V out of inverse-excitation type control unit 200.
As shown in Figure 3, at moment T1, as output voltage V out during from the L level conversion to the H level, 202 conductings of second switch element, and the drain current Id of the primary side of the inverse-excitation type transformer 201 of flowing through increases gradually.Afterwards, at moment T2, when drain current Id reached predetermined threshold, to the L level, and second switch element 202 turn-offed the output voltage V out of inverse-excitation type control unit 200 from the H level conversion.Therefore, drain current Id is blocked, so that the drain electrode of second switch element 202-source voltage Vds increases, and electric current flows into the primary side of inverse-excitation type transformer 201.
Afterwards, the electric current vanishing of the primary side of the inverse-excitation type transformer 201 of flowing through, and the drain electrode of second switch element 202-source voltage Vds begins to descend.In this case; Because frequency of oscillation or the like is former thereby take place time of delay; Therefore at the moment T3 that begins from drain electrode-source voltage Vds to descend when passing through said time of delay, output voltage V out from the L level conversion to the H level, and second switch element 202 conductings.
In this manner, the 202 conducting/shutoffs of second switch element so that reverse excitation circuit 20 locates to generate dc voltage at its lead-out terminal (two ends of electrolytic capacitor 204), and are applied to luminescence unit 1 with the dc voltage that is generated.
And, come the increase of the electric current of the light output of selfluminous cell 1 and the light-emitting component 11 of flowing through to increase pro rata.As shown in Figure 2, the amplitude of the electric current of the light-emitting component 11 of flowing through is reflected in the voltage between the two ends of the secondary coil that is arranged at inverse-excitation type transformer 201 and the resistor 205 between the electrolytic capacitor 204.Therefore, the increase of the electric current of voltage between the two ends of resistor 205 and light-emitting component 11 increases pro rata.In this case; Feedback circuit 27 is connected to link node between electrolytic capacitor 204 and the resistor 205 with the voltage (will be described later) between the two ends of detecting the resistor 278 in resistor 205 and the feedback circuit 27, thereby makes reflection come the feedback signal of the light output of selfluminous cell 1 to be fed back to inverse-excitation type control unit 200.
Promptly; Feedback circuit 27 receives from the output of adjusting control circuit 26 and through voltage between the two ends of resistor 205 and resistor 278 and output from adjusting control circuit 26 are compared and generates feedback signal, thereby the light of selfluminous cell 1 output in the future is adjusted to the expectation light modulation ratio of being confirmed by adjusting control circuit 26.Inverse-excitation type control unit 200 is regulated the output from reverse excitation circuit 20 through the switching of controlling second switch element 202 according to feedback signal, thereby to expect that light modulation is than brightness adjustment control luminescence unit 1.
Below, the configuration of the detailed circuit that is used to realize adjusting control circuit 26 that top light modulation is lighted and feedback circuit 27 will be described with reference to Fig. 1.Adjusting control circuit 26 forms dimming control unit with feedback circuit 27.
Adjusting control circuit 26 has the photoelectrical coupler 262 of diode bridge 261 that is arranged on its input terminal place and the output that is connected to diode bridge 261.As the control signal of PWM (pulse width modulation) signal, its duty ratio changes according to the desired value of light modulation ratio, is input to diode bridge 261 from the external control devices (not shown).Because control appliance changes the duty ratio of control signal according to the desired value of controlling the definite light modulation ratio of controlling of unit (not shown) through light modulation; Therefore control appliance increases the duty ratio of control signal along with the increase (that is, along with the approaching more on-state fully of desired value) of the desired value of light modulation ratio.Control appliance has the power circuit different power circuit with apparatus for lighting 2, but when activating lighting device 10, utilizes apparatus for lighting 2 to be supplied with power simultaneously.
Be applied to the primary side of photoelectrical coupler 262 from the control voltage vcc 1 of power controlling feeding unit 25 output via resistor 263, and the base stage of npn transistor 264 is connected to the link node between resistor 263 and photoelectrical coupler 262.And then adjusting control circuit 26 has control IC (integrated circuit) 265, and the input terminal of this control IC is connected to the collector electrode of transistor 264, and the emitter of transistor 264 is connected to circuit ground.Control voltage vcc 1 is applied to the power terminal of control IC 265.
The lead-out terminal of control IC 265 is connected to circuit ground via the series circuit of resistor 266 and 267, and the link node of resistor 266 and 267 is connected to the grid of the 3rd switch element 268. Resistor 270 and 271 series circuit are connected between the lead-out terminal of the reference power feeding unit (not shown) that is used to generate reference voltage V cc2.The 3rd switch element 268 is arranged between the link node and circuit ground of resistor 270 and 271.And then the series circuit and the 3rd switch element 268 of resistor 272 and capacitor 273 are connected in parallel, and the series circuit and the capacitor 273 of resistor 274 and capacitor 275 are connected in parallel.
Therefore; Adjusting control circuit 26 be operated to from the control signal of control appliance input through diode bridge 261 by rectification, the control signal of institute's rectification is insulated through photoelectrical coupler 262 that anti-phase and the signal that produced then are imported into control IC 265 once more with anti-phase and through transistor 264.The waveform of 265 pairs of input signals of control IC carries out shaping and anti-phase and through using the signal that is produced to control the on/off operation of the 3rd switch element 268 as signal.That is, the 3rd switch element 268 turn-offs when control signal is in the H level, and the 3rd switch element 268 conductings when control signal is in the L level.
At the conducting or when turn-offing of the 3rd switch element 268, the impulse wave (a) shown in the link node P1 place generation Fig. 4 between resistor 270 and 271 in response to control signal.The impulse wave that generates at link node P1 place has the waveform that has identical polar and duty ratio with the impulse wave of control signal.That is, when control signal was in the L level, the impulse wave that generates at link node P1 place had the L level, and when control signal was in the H level, the impulse wave that generates at link node P1 place had the H level.
When generating such pulse at link node P1 place, as shown in Figure 4, the link node P2 place between resistor 272 and capacitor 273 generates by the level and smooth waveform (b) of integrating circuit that comprises resistor 272 and capacitor 273.And then as shown in Figure 4, the link node P3 place between resistor 274 and capacitor 275 generates by the level and smooth waveform (c) of integrating circuit that comprises resistor 274 and capacitor 275.
In brief; The impulse wave that utilizes pwm signal to realize converts the dc voltage with less relatively ripple component into through second-order low-pass filter (integrating circuit), and is used as brightness adjustment control voltage then and outputs to feedback circuit 27 from the link node P3 between resistor 274 and the capacitor 275.In other words, dc voltage from the duty ratio of control signal to its amplitudes of feedback circuit 27 output that confirm according to of adjusting control circuit 26 is as brightness adjustment control voltage.For this reason, adjusting control circuit 26 reduces brightness adjustment control voltage pro rata with the reduction of the duty ratio of control signal.
That is, from the control voltage vcc 1 of the power controlling feeding unit 25 output series circuit through three resistors 277,278 and 205 carry out dividing potential drop and then the voltage between resistor 278 and 205 the two ends be imported into the in-phase input terminal of OP Amp 276.In this case, as stated, the voltage between the two ends of resistor 205 changes according to the light output of luminescence unit 1, and confirms the amplitude of brightness adjustment control voltage according to the duty ratio of control signal.
Therefore, OP Amp 276 will indicate from the brightness adjustment control voltage in the voltage two ends of resistor 278 and 205 between (below be called " voltage that detected ") and its amplitude according to control signal confirmed of reverse excitation circuit 20 to the intensity of the power of light-emitting component 11 supply and compare.Therefore, OP Amp 276 turn-on transistor 279 and when the voltage that is detected is lower than brightness adjustment control voltage, turn-off transistor 279 when the voltage that is detected is equal to, or greater than brightness adjustment control voltage.
In brief, as the result that the voltage that is detected and brightness adjustment control voltage are compared, if the voltage that is detected is lower than dimming control unit, feedback circuit 27 operation reverse excitation circuits 20 then, and then from reverse excitation circuit 20 to the light-emitting component power supplied.Comparatively speaking, if the voltage that is detected is higher than brightness adjustment control voltage, then feedback circuit 27 stops the operation of reverse excitation circuit 20 and stops the power supply from reverse excitation circuit 20 to light-emitting component then.
Through above configuration, when the brightness adjustment control voltage from adjusting control circuit 26 outputs was zero, apparatus for lighting 2 maintained off state with luminescence unit 1.Simultaneously, when brightness adjustment control voltage was maximized, the state of luminescence unit 1 became (specified lighting) state of connecting fully.And then when brightness adjustment control voltage changed according to the duty ratio of control signal, apparatus for lighting 2 also depended on the change of brightness adjustment control voltage and changes the light output that comes selfluminous cell 1.As a result, in response to the control signal from control appliance, apparatus for lighting 2 can be with the expectation light modulation that comprises off state and complete on-state than brightness adjustment control luminescence unit 1.
Yet, in the present embodiment, owing to adjusting control circuit 26 is controlled reverse excitation circuit 20 in response to the control signal from external equipment (control appliance) input, therefore the situation that the input of control signal postpones from the equipment of starting light 2 quilts can take place.And,, consider when the input of control signal is postponed that because circuit starts immediately, so the state of luminescence unit 1 instability that becomes is transfused to up to control signal at the apparatus for lighting that is used for light-emitting component 11 2 power supplied after.
Therefore; In the present embodiment, the mode that comprises the dimming control unit control reverse excitation circuit 20 of adjusting control circuit 26 and feedback circuit 27 is when control signal is not imported, to stop from as the power supply to luminescence unit 1 of the reverse excitation circuit 20 of power feeding unit.Promptly; As stated, when the brightness adjustment control voltage from adjusting control circuit 26 outputs was zero, apparatus for lighting 2 stopped the operation of reverse excitation circuit 20 through turn-on transistor 279; Thereby stopping power supply to luminescence unit 1, the result is that luminescence unit 1 is maintained at off state.
For this reason, when the voltage that is detected is lower than brightness adjustment control voltage, feedback circuit 27 operation reverse excitation circuits 20.Therefore, in order when control signal is imported, not make the voltage that is detected be not less than brightness adjustment control voltage, certain bias voltage is applied to the voltage that is detected.At length say; As stated; From the control voltage vcc 1 of the power controlling feeding unit 25 output series circuit dividing potential drop through three resistors 277,278 and 205, and the voltage between the two ends of resistor 278 and 205 is input to OP Amp 276 as the voltage that is detected.Therefore, because certain bias voltage is applied to the voltage that is detected through control voltage vcc 1, therefore, even the voltage that when power is not applied to light-emitting component 11, is detected can not change to zero yet.As a result, when control signal was not imported, the voltage that is detected became and is equal to, or greater than brightness adjustment control voltage.
According to the apparatus for lighting 2 of present embodiment, light-emitting component 11 is not maintained at off state when control signal is imported.Therefore, can avoid the only generation of connection flash of light of generation during a moment fully of light-emitting component 11 before controlling to the light modulation of expecting light output definitely.And; In apparatus for lighting 2; Back to back predetermined amount of time inner control signal is not cancelled after the power supply; Identical with the situation of disclosed configuration in JP2009-232625A, apparatus for lighting 2 can be immediately based on control signal when control signal is transfused to, with light modulation than brightness adjustment control luminescence unit 1.That is, even have marked difference between the time of delay of each control appliance, can prevent that also the startup of apparatus for lighting 2 from being postponed, each time of delay is in the scope between the output that is fed to control signal of power.
The result; Even the input of control signal was postponed from the moment of beginning power supply; Apparatus for lighting 2 also can make luminescence unit 1 be in off state to be transfused to up to control signal, and when control signal is imported brightness adjustment control luminescence unit 1 immediately, thereby realize soft light modulation.Such apparatus for lighting 2 is arranged in the lighting device 10, and thereby the high-quality lighting device 10 with level and smooth light modulation can be provided.
And; Utilization is applied to the certain bias voltage of the voltage that is detected; Although brightness adjustment control voltage in the time of can occurring in control signal and do not import is because the influence of noise etc. and non-vanishing; But the voltage that can not take place to be detected is lower than the brightness adjustment control voltage condition, and thereby, can stop the operation of reverse excitation circuit 20 reliably.Therefore, even when control signal is not imported, there is the influence of noise etc., apparatus for lighting 2 also can maintain off state with light-emitting component 11 with confirming.
Next, in the present embodiment, control signal is implemented as pwm signal, and its duty ratio changes according to the desired value of light modulation ratio, and the amplitude of brightness adjustment control voltage changes according to the duty ratio of control signal.Because this, apparatus for lighting 2 can be used in combination with the universal control devices of output pwm signal as control signal, and owing to can set the amplitude of brightness adjustment control voltage in detail, therefore can realize accurate brightness adjustment control.
And according to the apparatus for lighting 2 of present embodiment, no matter how long the time point from power supplied begins to have passed through, and when not having the control signal input, luminescence unit 1 is always maintained at off state.For example, even in control appliance, take place unusual and control signal is interrupted, luminescence unit 1 also can maintain off state.And; With after the power supply, be converted to the lighting device 10 of complete on-state and initially begin in the situation of lighting device 10 of complete on-state or the like identical from dimming state; If connect a plurality of lighting devices 10 of carrying out different start-up operations simultaneously, then can obtain advantage through the apparatus for lighting of using according to present embodiment 2.
That is, not to apparatus for lighting 2 input control signals the time, all lighting devices 10 are maintained at off state.Therefore, advantage is: even without using microcomputer etc. for the 10 individual setting scheduled times of lighting device, also can easily light SECO lighting device 10 with output of expectation light or expectation.
Although illustrate and described the present invention with reference to embodiment, the present invention is not limited thereto.Those of ordinary skill in the art will understand, and can under the situation that does not depart from the scope of the present invention that is limited following claim, make various changes and modification.
Claims (6)
1. apparatus for lighting comprises:
The power feeding unit is used for to the light-emitting component power supplied; And
Dimming control unit is used for controlling said power feeding unit according to the control signal of the input from the outside, carries out brightness adjustment control thereby compare said light-emitting component with the expectation light modulation,
Wherein, said dimming control unit is controlled said power feeding unit, so that when having the control signal input, do not stop to supply said power from said power feeding unit to said light-emitting component.
2. apparatus for lighting as claimed in claim 1, wherein, said dimming control unit is configured to when the input of said control signal with the light modulation ratio corresponding to said control signal said light-emitting component to be carried out brightness adjustment control.
3. like claim 1 or 2 described apparatus for lighting; Wherein, Said dimming control unit compares brightness adjustment control voltage and the voltage that is detected; And said power feeding unit is supplied said power to said light-emitting component when the voltage that is detected is lower than said brightness adjustment control voltage; And said power feeding unit stops to supply said power to said light-emitting component when the voltage that is detected equals or be higher than said brightness adjustment control voltage; And wherein certain bias voltage is applied to the voltage that is detected and is lower than said brightness adjustment control voltage to prevent the voltage that when said control signal is not imported, is detected, and the amplitude of wherein said brightness adjustment control voltage is confirmed that by said control signal the voltage indication that is detected is from the intensity of said power feeding unit to the power of said light-emitting component supply.
4. lamp device as claimed in claim 3, wherein, the duty ratio of said control signal changes according to the desired value of said light modulation ratio, and the said amplitude of said brightness adjustment control voltage changes according to the said duty ratio of said control signal.
5. lamp device as claimed in claim 4, wherein, along with the said duty ratio of said control signal becomes littler, the said amplitude of said brightness adjustment control voltage becomes littler.
6. lighting device comprises:
Like claim 1 or 2 described apparatus for lighting; And
Luminescence unit with said light-emitting component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011094751A JP5828107B2 (en) | 2011-04-21 | 2011-04-21 | Lighting device and lighting apparatus provided with the same |
| JP094751/2011 | 2011-04-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102752906A true CN102752906A (en) | 2012-10-24 |
| CN102752906B CN102752906B (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210088671.9A Expired - Fee Related CN102752906B (en) | 2011-04-21 | 2012-03-29 | Lighting device and illumination apparatus having the same |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2515612A1 (en) |
| JP (1) | JP5828107B2 (en) |
| CN (1) | CN102752906B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103648206A (en) * | 2013-11-15 | 2014-03-19 | 天津天地伟业数码科技有限公司 | Infrared-lamp drive circuit based on switching power supply |
| CN104053275A (en) * | 2013-03-11 | 2014-09-17 | 硅工厂股份有限公司 | Lighting apparatus |
| CN107577181A (en) * | 2017-08-30 | 2018-01-12 | 苏州麦喆思科电子有限公司 | A kind of civil power household electricity control system using conjunction inside back cover pole pipe |
| CN109309993A (en) * | 2018-11-16 | 2019-02-05 | 苏州中储普华电力科技有限公司 | Circuit light adjusting circuit for intelligent lighting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5978509B2 (en) | 2011-07-25 | 2016-08-24 | 矢崎総業株式会社 | High voltage conductive path and wire harness |
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| US5530322A (en) * | 1994-04-11 | 1996-06-25 | Lutron Electronics Co., Inc. | Multi-zone lighting control system |
| CN101971703A (en) * | 2008-03-24 | 2011-02-09 | 东芝照明技术株式会社 | Power supply device and illuminating apparatus provided with power supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4921812B2 (en) * | 2006-03-01 | 2012-04-25 | パナソニック株式会社 | Lighting power supply circuit and lighting fixture |
| US7908757B2 (en) * | 2008-10-16 | 2011-03-22 | Hexagon Metrology, Inc. | Articulating measuring arm with laser scanner |
| JP5307763B2 (en) * | 2010-05-28 | 2013-10-02 | 三菱電機照明株式会社 | LED lighting device and lighting fixture |
-
2011
- 2011-04-21 JP JP2011094751A patent/JP5828107B2/en active Active
-
2012
- 2012-03-28 EP EP20120002223 patent/EP2515612A1/en not_active Withdrawn
- 2012-03-29 CN CN201210088671.9A patent/CN102752906B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5530322A (en) * | 1994-04-11 | 1996-06-25 | Lutron Electronics Co., Inc. | Multi-zone lighting control system |
| CN101971703A (en) * | 2008-03-24 | 2011-02-09 | 东芝照明技术株式会社 | Power supply device and illuminating apparatus provided with power supply device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053275A (en) * | 2013-03-11 | 2014-09-17 | 硅工厂股份有限公司 | Lighting apparatus |
| CN103648206A (en) * | 2013-11-15 | 2014-03-19 | 天津天地伟业数码科技有限公司 | Infrared-lamp drive circuit based on switching power supply |
| CN107577181A (en) * | 2017-08-30 | 2018-01-12 | 苏州麦喆思科电子有限公司 | A kind of civil power household electricity control system using conjunction inside back cover pole pipe |
| CN109309993A (en) * | 2018-11-16 | 2019-02-05 | 苏州中储普华电力科技有限公司 | Circuit light adjusting circuit for intelligent lighting |
| CN109309993B (en) * | 2018-11-16 | 2024-02-27 | 苏州中储普华电力科技有限公司 | Loop dimming circuit for intelligent illumination |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2515612A1 (en) | 2012-10-24 |
| JP2012227039A (en) | 2012-11-15 |
| CN102752906B (en) | 2014-11-05 |
| JP5828107B2 (en) | 2015-12-02 |
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