CN205584579U - A output power control circuit for among LED benefit light controlling circuit - Google Patents
A output power control circuit for among LED benefit light controlling circuit Download PDFInfo
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- CN205584579U CN205584579U CN201520955935.5U CN201520955935U CN205584579U CN 205584579 U CN205584579 U CN 205584579U CN 201520955935 U CN201520955935 U CN 201520955935U CN 205584579 U CN205584579 U CN 205584579U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses an output power control circuit for among LED benefit light controlling circuit, is including high bright power control part, low bright power control subtotal chip U10, the signal input part P5 of high bright power control part connected with single -chip control circuit's an output, chip U10's a output pin 10 1 meet the signal output part vf1 of high bright power control part, is the signal input part P7 of low bright power control part connected with single -chip control circuit's an output, chip U10's a output pin 10 7 meet the signal output part vf2 of high bright power control part. The beneficial effects of the utility model are that: candid photograph power when having realized triggering with the normal bright output in TTL level control LED light filling lamp source and camera.
Description
Technical field
This utility model relates to a kind of monitoring camera circuit, particularly relates to a kind of output power controlling circuit in belt-type shutter exposure camera LED light filling control circuit.
Background technology
Belt-type shutter exposure camera is owing to can understand scene capture under relatively low light situation, it has also become the important picture pick-up device of monitoring system, plays the effect become more and more important.During taking pictures, need stronger light to be understood by scene capture, owing to belt-type shutter exposure camera uses sequential exposure line by line, need light compensating lamp to be operated in constant current state, the triggering response time of light compensating lamp is critically important simultaneously, needs quickly to turn on and off when video camera triggers.
The mainly normal bright light of LED of cooperation belt-type shutter exposure camera light filling of the prior art, the normal bright light of LED is when video camera sends triggering command, it is impossible to the brightness of light compensating lamp be adjusted, it is more difficult to obtains and shoots picture clearly.
Utility model content
The purpose of this utility model is, for the deficiencies in the prior art, it is provided that a kind of output power controlling circuit for being adjusted light compensating lamp brightness.
In order to realize object above, this utility model have employed techniques below scheme:
A kind of output power controlling circuit in LED light filling control circuit, divides including highlighted power control section, low bright power control section is divided and chip U10, and chip U10 separates highlighted power control section and divides and low bright power control section parallel circuit；
The signal input part P5 that highlighted power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P5 is connected by the base stage of resistance R50 and audion Q7, the colelctor electrode of audion Q7 connects positive source by resistance R55, the grounded emitter of audion Q7, the colelctor electrode of audion Q7 is connected with one end of filter resistance R59, the other end of filter resistance R59 connects one end of filter capacitor C25, and the other end of filter capacitor C25 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R68 of filter capacitor C25, one end of isolation resistance R68 connects a signal input pin 10-3 of chip U10 by resistance R70, pin 10-2 mono-tunnel of chip U10 is connected to one end of resistance R75, the other end of resistance R75 is connected with pin 10-4, pin 10-4 ground connection；Pin 10-2 mono-tunnel of chip U10 is connected with resistance R77, the other end of resistance R77 is connected with a signal output pin 10-1 of chip U10, pin 10-1 is provided with the signal output part Vf1 that highlighted power control section is divided, and the signal that pin 10-3 inputs is amplified and passes through the signal after pin 10-1 output is amplified by chip U10；
The signal input part P7 that low bright power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P7 is connected by the base stage of resistance R51 and audion Q8, the colelctor electrode of audion Q8 connects positive source by resistance R54, the grounded emitter of audion Q8, the grounded emitter of audion Q8, the colelctor electrode of audion Q8 is connected with one end of filter resistance R60, the other end of filter resistance R59 connects one end of filter capacitor C26, and the other end of filter capacitor C26 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R69 of filter capacitor C25, one end of isolation resistance R69 connects a signal input pin 10-5 of chip U10 by resistance R72, the pin 10-6 of chip U10 passes through resistance R76 ground connection, the pin 10-6 of chip U10 is connected by a signal output pin 10-7 of resistance R78 and chip U10, pin 10-7 connects low bright power control section the signal output part Vf2, chip U10 that divide by diode D9 and is amplified by the signal that pin 10-5 input and pass through the signal after pin 10-7 exports amplification.Above-mentioned output power controlling circuit, highlighted power control section is divided and low bright power control section is divided by independent circuit realiration, and two parts circuit is connected by chip U10, do not interfere with each other mutually.Highlighted power control section divide in audion Q7 and low bright power control section divide in audion Q8 respectively the more weak duty cycle signals that the single-chip microcomputer received provides is changed into the analog level signal that circuit can clearly identify, further, analog level signal exports after the chip U10 in subsequent conditioning circuit amplifies.LED light supplement lamp source is operated under low bright power at ordinary times, highlighted power light filling just can be opened after receiving triggering signal, therefore, the outfan that low bright power control section is divided arranges diode D9, can effectively prevent the DC circuit for providing constant current for LED light supplement lamp source being connected with output power controlling circuit DL4 in turn to output power controlling circuit DL4 generation interference.
As preferably, described low bright power control section is divided, and the junction of filter resistance R60 and filter capacitor C26 is provided with 0 level input VG2.In actual use, 0 level input VG2, for being connected with an output pin of single chip machine controlling circuit, exports 0 level by single chip machine controlling circuit and realizes rapidly switching off LED light supplement lamp source when working at ordinary times this circuit part.
Therefore, the beneficial effects of the utility model are: achieve candid photograph power during normal bright output and the video camera triggering controlling LED light supplement lamp source with Transistor-Transistor Logic level.
Accompanying drawing explanation
Fig. 1 is this utility model functional schematic block diagram in LED light filling control circuit；
Fig. 2 is this utility model circuit diagram in LED light filling control circuit；
Fig. 3 is the output voltage controlling circuit DL3 schematic diagram in LED light filling control circuit；
Fig. 4 is this utility model schematic diagram；
Fig. 5 is the MX485 change-over circuit DL5 schematic diagram in LED light filling control circuit；
Fig. 6 is the low-voltage direct translation circuit DL2 schematic diagram in LED light filling control circuit；
Fig. 7 is the triggering logic circuit DL7 schematic diagram in LED light filling control circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is further described.
A kind of output power controlling circuit in LED light filling control circuit as shown in Figure 1, the input of output power controlling circuit is connected with the two of single-chip microcomputer signal output parts, and the outfan of output power controlling circuit is connected with the DC circuit being used for as the offer constant current of LED light supplement lamp source.
The signal input part P5 that highlighted power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P5 is connected by the base stage of resistance R50 and audion Q7, the colelctor electrode of audion Q7 connects positive source by resistance R55, the grounded emitter of audion Q7, the colelctor electrode of audion Q7 is connected with one end of filter resistance R59, the other end of filter resistance R59 connects one end of filter capacitor C25, and the other end of filter capacitor C25 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R68 of filter capacitor C25, one end of isolation resistance R68 connects a signal input pin 10-3 of chip U10 by resistance R70, pin 10-2 mono-tunnel of chip U10 is connected to one end of resistance R75, the other end of resistance R75 is connected with pin 10-4, pin 10-4 ground connection；Pin 10-2 mono-tunnel of chip U10 is connected with resistance R77, the other end of resistance R77 is connected with a signal output pin 10-1 of chip U10, pin 10-1 is provided with the signal output part Vf1 that highlighted power control section is divided, and the signal that pin 10-3 inputs is amplified and passes through the 10-4 foot ground connection of the signal chip U10 after pin 10-1 output is amplified by chip U10.
The signal input part P7 that low bright power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P7 is connected by the base stage of resistance R51 and audion Q8, the colelctor electrode of audion Q8 connects positive source by resistance R54, the grounded emitter of audion Q8, the grounded emitter of audion Q8, the colelctor electrode of audion Q8 is connected with one end of filter resistance R60, the other end of filter resistance R59 connects one end of filter capacitor C26, and the other end of filter capacitor C26 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R69 of filter capacitor C25, one end of isolation resistance R69 connects a signal input pin 10-5 of chip U10 by resistance R72, the pin 10-6 of chip U10 passes through resistance R76 ground connection, the pin 10-6 of chip U10 is connected by a signal output pin 10-7 of resistance R78 and chip U10, pin 10-7 connects low bright power control section the signal output part Vf2, chip U10 that divide by diode D9 and is amplified by the signal that pin 10-5 input and pass through the signal after pin 10-7 exports amplification.8th foot of chip U10 connects+5V power supply.
This utility model is a part of circuit in a kind of belt-type shutter exposure camera LED light filling control circuit, and the structure of belt-type shutter exposure camera LED light filling control circuit is as follows:
A kind of belt-type shutter exposure camera LED light filling control circuit as depicted in figs. 1 and 2, includes single-chip microcomputer, peripheral circuit and storage chip including commutator B, flyback switch transformed circuit K, flyback switch change-over control circuit DL1, low-voltage direct translation circuit DL2, output voltage controlling circuit DL3, output filtering storage capacitor C13, inspection leakage resistance R1 and R2, output power controlling circuit DL4, MAX485 change-over circuit DL5, single chip machine controlling circuit DL6(), trigger logic circuit DL7, temperature sensing circuit DL8 and LED light supplement lamp source.Power supply between input termination exchange 90V to the 264V of commutator B.It is transformed into galvanic current pressure by flyback switch transformed circuit K after commutator B rectification.Flyback switch change-over control circuit DL1 controls flyback switch transformed circuit K work according to the signal of output voltage controlling circuit DL3.MAX485 communication interface on single chip machine controlling circuit DL6 can receive the control command of video camera by MAX485 change-over circuit DL5, completes corresponding function, simultaneously single chip machine controlling circuit DL6 can also the running status of testing circuit, protect in abnormal cases.Trigger logic circuit DL7 single-chip microcomputer and triggering of video camera are delivered to the light on and off of low-voltage direct translation circuit DL2 triggering LED and the size controlling LED light supplement lamp source power after signal mixes.
Fig. 3 is output voltage controlling circuit DL3 schematic diagram, and wherein R19 mono-terminates the output of flyback switch transformed circuit K, and another terminates diode D7, diode D7 output and meets electric capacity C16 is that chip U7 powers.Detection resistance R1 is connected on R27 one end and R27 connects 3 feet of chip U7 and realizes current detecting.Resistance R44, R45 and R46 series connection forms bleeder circuit, forms low voltage in one end of R46 and delivers to 7 feet of chip U7, is used for detecting output voltage.6 feet and the formation negative feedback of 7 feet of chip U7 is received in resistance R43 and electric capacity C20 series connection, and 3 feet and 6 feet of chip U7 are received in resistance R28 and electric capacity C18 series connection, and electric capacity C17 is connected on 3 feet of U7 and plays integral action together with R27.When output voltage raises or output electric current increases, the 6 foot voltage drops of chip U7 reduce, and make the electric current of optocoupler U4 become big, and then act on inverse-excitation converting control circuit, limiting output voltage or the increase of electric current, vice versa, thus realizes constant current and the Isobarically Control of output.
As shown in Fig. 2, Fig. 4 and Fig. 6, Fig. 4 is output power controlling circuit DL4 schematic diagram, and output power controlling circuit DL4 achieves and controls the candid photograph power (highlighted power) when normal bright output (low bright power) and video camera triggering with Transistor-Transistor Logic level.Wherein resistance R51 mono-end receives the P7 foot of single-chip microcomputer U1, the base stage of another termination audion Q8, the colelctor electrode of Q8 connects one end of R54 and R60, the R54 other end connects 5V power supply, the R60 other end connects one end of electric capacity C26 and R72, it is achieved the duty cycle signals of single-chip microcomputer output is converted to analog level signal, and the other end of resistance R72 connects 5 feet of chip U10, the signal that 10-5 foot inputs is amplified by chip U10, is exported by 10-7 foot.The 10-7 foot of chip U10 connects diode D9 positive pole, diode D9 negative pole connects one end of resistance R38, R41 and the R64 in low-voltage direct translation circuit DL2, the other end of resistance R41 connects the power control pin 8-3 of chip U8, it is achieved under normal bright state, unlatching, closedown and the watt level of lamp are controlled by single-chip microcomputer.In Fig. 4, resistance R50 mono-end receives the P5 foot of single-chip microcomputer U1, the base stage of another termination audion Q7, the colelctor electrode of audion Q7 connects one end of resistance R55 and R59, the resistance R55 other end connects 5V power supply, the resistance R59 other end connects one end of electric capacity C25 and R70, it is achieved the duty cycle signals that single-chip microcomputer exports is converted to analog level signal, and the other end of resistance R70 connects the 10-3 foot of chip U10, the highlighted power control signal that pin 10-3 inputs is amplified by chip U10, is exported by 10-1 foot.
Fig. 5 is that MX485 receives circuit.Wherein resistance R33 and R34 is current-limiting resistance, resistance R31 is the input pull-up resistor of 6 feet of chip U6, resistance R29 is the input pull down resistor of 7 feet of chip U6,2 feet of U6 and 3 feet are connected, realize the enable to communication by the P6 foot of single-chip microcomputer to control, camera signal is sent to single-chip microcomputer by receiving 1 foot by chip U6, and single-chip microcomputer sends single-chip microcomputer signal to video camera by P4 foot, it is achieved single-chip microcomputer and the communication of video camera.
Fig. 6 is low-voltage direct translation circuit DL2(this utility model circuit theory diagrams).One end of audion Q4 emitter stage and resistance R35 connects the 10-1 foot of the chip U10 of output power controlling circuit DL4, the other end of resistance R35 connects base stage and one end of resistance R36 of audion Q4, and the other end of resistance R36 even triggers the colelctor electrode of the output triode Q10 of logic circuit DL7.The colelctor electrode of audion Q4 connects the other end of resistance R38.The 8-5 foot of chip U8 connects the grid of metal-oxide-semiconductor Q6, and the peak point current of metal-oxide-semiconductor Q6 is flow through in resistance R2 sampling, and the magnitude of voltage of sampling receives the 8-6 foot of chip U8 through resistance R48, and metal-oxide-semiconductor is turned off by chip U8 by 8-6 foot sampled peak electric current.When normally working, the switch of the signal control metal-oxide-semiconductor that chip U8 is exported by output power controlling circuit DL4 realizes the constant current output in LED light supplement lamp source.The duty cycle signals exported by the P7 foot of single-chip microcomputer U1 can change normal bright power (the low bright power) size of LED.When video camera output triggers signal, by opening audion Q4, the output signal of 1 foot of U10 is connected to the 8-3 foot of U8, by Vf1 end and the Signal averaging of Vf2 end, it is achieved the highlighted output of LED.The highlighted watt level of LED can be changed by the duty cycle signals of regulation single-chip microcomputer P5 foot output.
Fig. 7 is to trigger logic circuit DL7 schematic diagram.Wherein, resistance R47 is connected between 1 foot of chip U9 and external trigger pin, plays the effect of current limliting.3 feet of chip U9 are connected to the negative terminal of outer triggering signal.Optocoupler U9 is the high speed photo coupling that can trigger with Transistor-Transistor Logic level, plays buffer action, improves reliability and the safety of system.Electric capacity C30 is connected between 4 feet of U9 and 5 feet, does filtering and uses.Resistance R66 is connected between 5 feet of U9 and 6 feet as pull-up resistor.Triggering signal is converted into reverse signal and delivers to audion Q9 by resistance R71 by 5 feet of U9, is connect the base stage of audion Q10 by resistance R73, and the highlighted power signal of control single chip computer output exports the power of U8 and controls foot.Resistance R67 is connected between the base stage of 5V power supply and audion Q9, emitter stage one tunnel of audion Q9 is connected with the pin P8 of single chip machine controlling circuit DL6, for the triggering received signal is sent to single chip machine controlling circuit DL6, single chip machine controlling circuit DL6 carries out abnormality detection to triggering the triggering signal that receives of logic circuit DL7, it is ensured that circuit properly functioning.
As shown in Fig. 2,4,6, in this patent, the signal output part that bright power control section in output power controlling circuit DL4 circuit is divided is connected with the highlighted power signal input in low-voltage direct translation circuit DL2, therefore the signal output part that divides of above-mentioned bright power control section and highlighted power signal input is actual refers to identical connection end, all represent with Vf1；In output power controlling circuit DL4 circuit, the signal output part bright power signal input low with low-voltage direct translation circuit DL2 of low-power control part is connected, therefore the signal output part of above-mentioned low-power control part and low bright power signal input is actual refers to identical connection end, all represent with Vf2.
It is specific embodiment of the utility model and the know-why used described in Yi Shang; if the change made according to conception of the present utility model; function produced by it still without departing from description and accompanying drawing contained spiritual time, protection domain of the present utility model must be belonged to.
Claims (2)
1. the output power controlling circuit in LED light filling control circuit, it is characterised in that including that highlighted power control section is divided, low bright power control section is divided and chip U10, chip U10 separates highlighted power control section and divides and low bright power control section parallel circuit；
The signal input part P5 that highlighted power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P5 is connected by the base stage of resistance R50 and audion Q7, the colelctor electrode of audion Q7 connects positive source by resistance R55, the grounded emitter of audion Q7, the colelctor electrode of audion Q7 is connected with one end of filter resistance R59, the other end of filter resistance R59 connects one end of filter capacitor C25, and the other end of filter capacitor C25 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R68 of filter capacitor C25, one end of isolation resistance R68 connects a signal input pin 10-3 of chip U10 by resistance R70, pin 10-2 mono-tunnel of chip U10 is connected to one end of resistance R75, the other end of resistance R75 is connected with pin 10-4, pin 10-4 ground connection；Pin 10-2 mono-tunnel of chip U10 is connected with resistance R77, the other end of resistance R77 is connected with a signal output pin 10-1 of chip U10, pin 10-1 is provided with the signal output part Vf1 that highlighted power control section is divided, and the signal that pin 10-3 inputs is amplified and passes through the signal after pin 10-1 output is amplified by chip U10；
The signal input part P7 that low bright power control section is divided is connected with an outfan of single chip machine controlling circuit, signal input part P7 is connected by the base stage of resistance R51 and audion Q8, the colelctor electrode of audion Q8 connects positive source by resistance R54, the grounded emitter of audion Q8, the grounded emitter of audion Q8, the colelctor electrode of audion Q8 is connected with one end of filter resistance R60, the other end of filter resistance R59 connects one end of filter capacitor C26, and the other end of filter capacitor C26 is connected with the emitter stage of audion Q7 and ground connection；Two outfan parallel connection isolation resistance R69 of filter capacitor C25, one end of isolation resistance R69 connects a signal input pin 10-5 of chip U10 by resistance R72, the pin 10-6 of chip U10 passes through resistance R76 ground connection, the pin 10-6 of chip U10 is connected by a signal output pin 10-7 of resistance R78 and chip U10, pin 10-7 connects low bright power control section the signal output part Vf2, chip U10 that divide by diode D9 and is amplified by the signal that pin 10-5 input and pass through the signal after pin 10-7 exports amplification.
A kind of output power controlling circuit in LED light filling control circuit the most according to claim 1, it is characterised in that described low bright power control section is divided, the junction of filter resistance R60 and filter capacitor C26 is provided with 0 level input VG2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520955935.5U CN205584579U (en) | 2015-11-25 | 2015-11-25 | A output power control circuit for among LED benefit light controlling circuit |
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| CN201520955935.5U CN205584579U (en) | 2015-11-25 | 2015-11-25 | A output power control circuit for among LED benefit light controlling circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449829A (en) * | 2017-03-13 | 2018-08-24 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using DC power supply |
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2015
- 2015-11-25 CN CN201520955935.5U patent/CN205584579U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449829A (en) * | 2017-03-13 | 2018-08-24 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using DC power supply |
| CN108449829B (en) * | 2017-03-13 | 2019-08-06 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using DC power supply |
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Address after: 311113 568 Huabao street, Qian Yuan Town, Deqing County, Huzhou, Zhejiang Patentee after: ZHEJIANG EBOY HIGH-TECH TECHNOLOGY Co.,Ltd. Address before: 311112 Liangyuan street, Liangzhu street, Yuhang District, Hangzhou, Zhejiang, 326 Patentee before: Hangzhou Eboylamp Electronics Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 |
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| CF01 | Termination of patent right due to non-payment of annual fee |