CN103906297A - A light source drive circuit and a lamp with the drive circuit - Google Patents

A light source drive circuit and a lamp with the drive circuit Download PDF

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Publication number
CN103906297A
CN103906297A CN201210582374.XA CN201210582374A CN103906297A CN 103906297 A CN103906297 A CN 103906297A CN 201210582374 A CN201210582374 A CN 201210582374A CN 103906297 A CN103906297 A CN 103906297A
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circuit
control
light source
light
signal
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CN201210582374.XA
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CN103906297B (en
Inventor
张国宝
周明兴
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Opple Lighting Co Ltd
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Opple Lighting Co Ltd
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Abstract

The invention discloses a light source drive circuit which comprises an integration control circuit, a light adjusting circuit and a constant current control circuit. The constant current control circuit is connected with a light source and provides current to the light source. The light source drive circuit further comprises a switch circuit. The integration control circuit at least has a first kind input control signal and a second kind input control signal. The integration control circuit outputs a control signal to control the light adjusting circuit. The light adjusting circuit controls the output current of the constant current control circuit. When a switch is opened, the output current of the constant current control circuit is controlled by the first kind input control signal of the integration control circuit; and when the switch is closed, the output current of the constant current control circuit is controlled by the second kind input control signal of the integration control circuit.

Description

Light source driving circuit and there is the light fixture of this drive circuit
[technical field]
The present invention relates to a kind of drive circuit, especially refers to a kind of drive circuit for light fixture.
[background technology]
The light of current light fixture all immobilizes or is manual setting light and shade by people.See TV but work as people in bedroom reading or parlor, be sitting in somewhere long-time when motionless, if the light of light fixture always keeps very high brightness, be unfavorable for energy-conservationly, and people needs brighter light to throw light in the time walking about, and repeatedly regulates back and forth light to bother very much.
Therefore,, in order to overcome above-mentioned defect, be necessary to provide a kind of improved light source driving circuit.
[summary of the invention]
The object of the present invention is to provide a kind of light source driving circuit of controllable automatic adjusting light light and shade.
To achieve these goals, the present invention adopts following technical scheme: a kind of light source driving circuit, comprise integral control circuit, light regulating circuit and constant-current control circuit, constant-current control circuit connects light source provides electric current for light source, light source driving circuit also comprises switching circuit, integral control circuit at least has the first input control signal and the second input control signal, integral control circuit output control signal control light regulating circuit, the output current of light regulating circuit control constant-current control circuit, when switch opens, the output current of constant-current control circuit is by the first input control signal control of integral control circuit, when switch cuts out, the output current of constant-current control circuit is by the second input control signal control of integral control circuit.
Compared to prior art, light source driving circuit of the present invention has the following advantages: the output current of constant-current control circuit can pass through at least two kinds of input control signal controls, and selectivity is strong, easy to operate.
The object of the present invention is to provide a kind of light fixture of multi-control mode.
To achieve these goals, the present invention adopts following technical scheme: a kind of light fixture comprises Infrared Detectors, light source driving circuit and light source, the signal input light source driving circuit of Infrared Detectors, light source driving circuit comprises light regulating circuit, the light and shade of light source is by light source driving circuit control, light fixture also comprises segmentation control switch, and the light and shade of light source can also be by the control of described segmentation control switch.
Compared to prior art, light fixture of the present invention has the following advantages: the signal controlling light source light and shade that both can record by Infrared Detectors, by can be by the light and shade of segmentation control switch control light source, selectivity be strong, easy to operate.
[brief description of the drawings]
Fig. 1 is the schematic diagram of light source driving circuit of the present invention.
Fig. 2 is the circuit diagram of integral control circuit, amplifying circuit, switching circuit and the segmentation control switch of the first preferred embodiment of light source driving circuit of the present invention.
Fig. 3 is the circuit diagram of filter circuit, light regulating circuit and the constant-current control circuit of the first preferred embodiment of light source driving circuit of the present invention.
Fig. 4 is the first preferred embodiment schematic diagram of light fixture of the present invention.
Fig. 5 is the figure of integral control circuit, amplifying circuit, switching circuit and the segmentation control switch of the second preferred embodiment of light source driving circuit of the present invention.
[embodiment]
Shown in Fig. 3, light source driving circuit 100 of the present invention is for driving LED light source.Light source driving circuit 100 comprises integral control circuit 102, light regulating circuit 103 and constant-current control circuit 104.Constant-current control circuit 104 connects light source led provides electric current for light source led.Integral control circuit 102 is exported control signal control light regulating circuit 103.Light regulating circuit 103 is controlled the output current of constant-current control circuit 104.Integral control circuit 102 is exported different control signals, and control signal shows as high level and low level, and in the time of high level output, the output current that light regulating circuit 103 is controlled constant-current control circuit 104 is large electric current, and now light source led brightens; In the time of low level output, the output current that light regulating circuit 103 is controlled constant-current control circuit 104 is little electric current, and now light source led is dimmed.
A kind of light source driving circuit 100 is for driving LED light source.Light source driving circuit 100 comprises integral control circuit 102, light regulating circuit 103 and constant-current control circuit 104.Constant-current control circuit 104 connects light source led provides electric current for light source led.Light source driving circuit 100 also comprises switching circuit 105, and integral control circuit 102 has the first input control signal and the second input control signal, and integral control circuit 100 is exported control signal control light regulating circuit 103.Light regulating circuit 103 is controlled the output current of constant-current control circuit 104.When switching circuit 105 is opened, the output current of constant-current control circuit 104 is by the first input control signal control of integral control circuit 100, when switching circuit 105 cuts out, the output current of constant-current control circuit 104 is by the second input control signal control of integral control circuit 100.
Light source driving circuit 100 also comprises amplifying circuit 101, amplifying circuit 101 connects integral control circuit 102, amplifying circuit 101 is exported amplifying signal, amplifying signal input integral control circuit 102, integral control circuit 102 receives different amplifying signals and exports different control signals to determine integral control circuit 102.The first input control signal of integral control circuit 102 is provided by amplifying circuit 101.
Integral control circuit 102 has integrated control chip IC1, and integrated control chip IC1 comprises first, second, third, fourth, the 5th, the 6th, the 7th and the 8th pin 1,2,3,4,5,6,7,8.The amplifying signal of amplifying circuit 101 is inputted the 7th pin 7 of integrated control chip IC1.The second pin 2 of integrated control chip is exported control signal.
Light source driving circuit 100 also comprises segmentation control switch 200, switching circuit 105 connects the 4th pin 4 of integrated control chip IC1, control integration control circuit 102, segmentation control switch 200 connects the 3rd pin 3 of integrated control chip IC1, provide the second input control signal of integral control circuit 102, control integration control circuit 102.The control signal that integral control circuit 102 is exported in the time that switching circuit 105 is opened changes along with the variation of amplifying signal, and in the time that switching circuit 105 cuts out, the control signal that integral control circuit 102 is exported is controlled by segmentation control switch 200.The the 5th, the 6th pin 5,6 of integrated control chip IC1 connects reference circuit 1020, thereby reference circuit 1020 compares for integral control circuit 102 provides reference voltage and amplifying signal the control signal that control integration control circuit 102 is exported.The first pin 1 cut-in operation voltage of integrated control chip IC1, the 8th pin 8 ground connection.
In the time of segmentation control switch 200 control integration control circuit 102, in the time of the switch opens of segmentation control switch 200 one time, integral control circuit 102 output HIGH voltages, thus light regulating circuit 103 control constant-current control circuit 104 and export large electric current, light source led is brighter; When the switch of segmentation control switch 200 cuts out while opening again, integral control circuit 102 output LOW voltages, thereby light regulating circuit 103 control constant-current control circuit 104 and export little electric current, light source led is darker.Segmentation control switch 200 cuts out number of times and is regulated the light and shade of light source led light by opening of switch, the shut-in time of opening of segmentation control switch 200 was decided by the power pack electrochemical discharge time of integrated control chip IC1.
Segmentation control switch 200 comprises capacitor C in parallel 21, resistance R 36, diode DW3 and capacitor C 22.Between diode DW3 and capacitor C 22, be connected a resistance R 37, capacitor C 22 is connected with power supply circuits 109 by a diode D1.
Light source driving circuit 100 also comprises filter circuit 107, and filter circuit 107 connects light regulating circuit 103 and constant-current control circuit 104.
Shown in Fig. 3, light regulating circuit 103 has common integrated control chip IC2 with constant-current control circuit 104.Integrated control chip IC2 comprises first, second, third, fourth, the 5th, the 6th, the 7th, the 8th pin a, b, c, d, e, f, g, h.The integrated control chip IC2 of light regulating circuit 103 of the present invention is L6562a chip, and the 3rd pin c of integrated control chip IC2 is MULT pin.The control signal of integral control circuit 102 is inputted the 3rd pin c of integrated control chip IC2, thereby controls the output current of constant-current control circuit 104.The constant-current control circuit 104 of the present embodiment has switch element Q1 and the two poles of the earth inductive circuit L1, L2.In the present embodiment, switch element Q1 is three utmost point metal-oxide-semiconductors.In the time that the control signal of input is high level, the switch element Q1 conducting of constant-current control circuit 104, the frequency of closing reduce, make the electric current of constant-current control circuit 104 become large, in the time that the control signal of input is low level, the switch element Q1 conducting of constant-current control circuit 104, the frequency of closing become large, the electric current of constant-current control circuit 104 is diminished, thereby adjust the light and shade of light source led.
Light regulating circuit 103 also comprises divider resistance R1, R2, and divider resistance R2 is precision resister.
Shown in Fig. 4, the present invention also provides a kind of light fixture 800, and light fixture 800 comprises Infrared Detectors 300, light source driving circuit 100 and light source led.Infrared Detectors 300 is surveyed external signal.The amplifying circuit 101 of light source driving circuit 100 is connected in Infrared Detectors 300 and integral control circuit 102, and the output signal of amplifying circuit 101 amplifying infrared detectors 300 forms amplifying signal, amplifying signal control integration control circuit 102.Light regulating circuit 103 connects integral control circuit 102, and integral control circuit 102 receives amplifying signal, exports different control signals according to the difference of amplifying signal.
Because human body is homeothermal animal, Infrared Detectors 300 can detect human body.Infrared Detectors 300 of the present invention is surveyed external information at set intervals one time, in the time detecting human body etc. and have the object of temperature and move, Infrared Detectors 300 is exported first signal, does not have when mobile when detecting human body etc. and have the object of temperature, and Infrared Detectors 300 is exported secondary signal.The signal that Infrared Detectors 300 is exported amplifies by the amplifying circuit 101 of light source driving circuit 100, output amplifying signal.In the time that amplifying signal is first signal, the integral control circuit 102 of light source driving circuit 100 is exported high level signal, when amplifying signal is secondary signal while reaching certain number of times, the integral control circuit 102 output low level signals of light source driving circuit 100, thus control the light and shade of light source led.
Light fixture 800 also comprises segmentation control switch 200 simultaneously, and the light and shade of light source led can also be controlled by segmentation control switch 200.The control signal that integral control circuit 102 is exported in the time that the switching circuit 105 of light source driving circuit 100 is opened changes along with the variation of amplifying signal, thus the light and shade of the signal controlling light source led being recorded by Infrared Detectors 300; In the time that the switching circuit 105 of light source driving circuit 100 cuts out, the control signal that integral control circuit 102 is exported is controlled by segmentation control switch 200, thereby is controlled the light and shade of light source led by segmentation control switch 200.
Light fixture 800 of the present invention both can have been surveyed by Infrared Detectors 300 light and shade of the signal controlling light source led obtaining, and can control by segmentation control switch 200 again the light and shade of light source led.Therefore, light fixture 800 of the present invention is very easy to use, and in the time that we do not need Infrared Detectors 300 detectable signals to control light fixture 800, the switch 105 on closed light fixture 800, controls the light source led light and shade of light fixture 800 with segmentation control switch 200.In the time that needs Infrared Detectors 300 detectable signals are controlled light fixture 800, open the switch on light fixture 800.
Shown in Fig. 5, the switching circuit in the first embodiment 105 is become remote control switch 408 by light source driving circuit 400 in the second embodiment of the present invention, now, only need to use a teleswitch 408 of remote control switches that (not shown) control light fixture 800 can be realized the effect of switching circuit 105 in the first embodiment.Remote control switch 408 comprises control chip IC3.Remote control switch 408 connects the 4th pin 4a of the integral control circuit 402 of light source driving circuit 400.

Claims (10)

1. a light source driving circuit, comprise integral control circuit, light regulating circuit and constant-current control circuit, described constant-current control circuit connects light source provides electric current for described light source, it is characterized in that: described light source driving circuit also comprises switching circuit, described integral control circuit at least has the first input control signal and the second input control signal, described integral control circuit output control signal control light regulating circuit, the output current of described light regulating circuit control constant-current control circuit, when described switch opens, the output current of constant-current control circuit is by the first input control signal control of integral control circuit, when described switch cuts out, the output current of constant-current control circuit is by the second input control signal control of integral control circuit.
2. light source driving circuit as claimed in claim 1, is characterized in that: described light source driving circuit also comprises segmentation control switch, and described segmentation control switch connects described integral control circuit so that the second input control signal to be provided.
3. light source driving circuit as claimed in claim 1, is characterized in that: described switching circuit is remote control switching circuit.
4. light source driving circuit as claimed in claim 1, it is characterized in that: described light source driving circuit also comprises amplifying circuit, described amplifying circuit connects described integral control circuit, described amplifying circuit output amplifying signal, described amplifying signal control integration control circuit.
5. light source driving circuit as claimed in claim 1, is characterized in that: described light regulating circuit comprises divider resistance, and described divider resistance is precision resister.
6. light source driving circuit as claimed in claim 5, it is characterized in that: described light regulating circuit and constant-current control circuit have common integrated control chip, the control signal of described integral control circuit is inputted the integrated control chip of described light regulating circuit and constant-current control circuit.
7. a light fixture, comprise Infrared Detectors, light source driving circuit and light source, it is characterized in that: the signal of described Infrared Detectors is inputted described light source driving circuit, described light source driving circuit comprises light regulating circuit, the light and shade of light source is by described light source driving circuit control, described light fixture also comprises segmentation control switch, and the light and shade of described light source can also be by the control of described segmentation control switch.
8. light fixture as claimed in claim 7, it is characterized in that: described light source driving circuit has switching circuit, when described switching circuit is opened, the signal controlling that the light and shade of light source is recorded by Infrared Detectors, when described switching circuit is closed, the light and shade of described light source is by the control of segmentation control switch.
9. light fixture as claimed in claim 7, is characterized in that: described switching circuit is remote control switching circuit.
10. light fixture as claimed in claim 9, it is characterized in that: described light source driving circuit also comprises amplifying circuit and integral control circuit, described amplifying circuit is connected in described Infrared Detectors and described integral control circuit, the output signal of described amplifying circuit amplifying infrared detector forms amplifying signal, described amplifying signal control integration control circuit, light regulating circuit connects integral control circuit, described integral control circuit receives amplifying signal, exports different control signals according to the difference of amplifying signal.
CN201210582374.XA 2012-12-28 2012-12-28 Light source driving circuit and there is the light fixture of this drive circuit Active CN103906297B (en)

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Application Number Priority Date Filing Date Title
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* Cited by examiner, † Cited by third party
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CN1874632A (en) * 2006-05-19 2006-12-06 李文萍 Energy saving set for illumination
CN101657051A (en) * 2008-08-19 2010-02-24 联咏科技股份有限公司 Light modulating device for light emitting diode, light modulating method related thereto and light emitting device related thereto
CN101478855A (en) * 2009-01-10 2009-07-08 吴广毅 Lamp light brightness regulating apparatus and method thereof
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