CN204069417U - Be applied to the LED Drive and Control Circuit of web camera - Google Patents
Be applied to the LED Drive and Control Circuit of web camera Download PDFInfo
- Publication number
- CN204069417U CN204069417U CN201420350661.2U CN201420350661U CN204069417U CN 204069417 U CN204069417 U CN 204069417U CN 201420350661 U CN201420350661 U CN 201420350661U CN 204069417 U CN204069417 U CN 204069417U
- Authority
- CN
- China
- Prior art keywords
- chip
- resistance
- electric capacity
- diode
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Led Devices (AREA)
Abstract
The utility model relates to the LED Drive and Control Circuit being applied to web camera, and it comprises the optical inductor, MCU, drive circuit and the infrared LED module that connect successively.The model of the chip U1 of drive circuit is T6322.Its feature is: operating temperature range can work between-40 DEG C ~ 125 DEG C; Caloric value is little, wide input voltage (7V-30V), and electric current, up to 1500mA, has enable control pin (EN), and available common I/O mouth controls the keying of infrared LED module; Feature maximum be in addition parameter by changing peripheral resistance to regulate the brightness of infrared LED module, can significantly raise the efficiency and simplify circuit design like this, more can provide stable constant current function, extend the useful life of infrared LED module.
Description
Technical field
The utility model relates to the LED control circuit of web camera.
Background technology
Along with the reinforcement of security personnel's consciousness, CCTV camera is more and more applied to the various aspects of life, and the thing followed is had higher requirement to the working stability performance, useful life etc. of CCTV camera.
Such as, CCTV camera by day or when using under the sufficient environment of illumination, light filling effect is better, imaging clearly.If usage monitoring video camera in night or rather dark environment, then because insufficient light causes image blur.Therefore, the CCTV camera with infrared night viewing function occurs thereupon, drives infrared lamp to produce infrared ray realize infrared night viewing function by LED Drive and Control Circuit plate.
After CCTV camera opens infrared night viewing function, infrared ray is through after the goggle glass of CCTV camera, due to place comparatively dark (such as underground garage), also relatively darker (light filling is not enough), the image effect that people see is fuzzyyer for LED infrared lamp simultaneously.Like this, under some special occasions, such as, bank monitoring video camera, then need image in monitoring range all to require very clear; But at this moment need to regulate LED infrared lamp brightness ability head it off.
But current LED Drive and Control Circuit plate according to the difference of environment for use, can not arrange different brightness,
Utility model content
The purpose of this utility model is to propose a kind of LED Drive and Control Circuit being applied to web camera, and it can solve under various different environment, and infrared LED lamp light filling deficiency causes the problem of image blur.
In order to achieve the above object, the technical scheme that adopts of the utility model is as follows:
Be applied to the LED Drive and Control Circuit of web camera, it comprises the optical inductor, MCU, drive circuit and the infrared LED module that connect successively, wherein, described drive circuit comprises chip U1, diode D1, diode D2, electric capacity C7, electric capacity C8, electric capacity C12, electric capacity C6, the first resistance, resistance R10, resistance R11, inductance L 3 and triode Q1, the model of described chip U1 is T6322, the EN pin of chip U1 is connected with an I/O mouth of MCU, the ADJ pin of chip U1 is connected with the collector electrode of triode Q1, the grounded emitter of triode Q1, the base stage of triode Q1 is connected by the 2nd I/O mouth of resistance R11 and MCU, the LX pin of chip U1 is by electric capacity C6 ground connection, the LX pin of chip U1 is also connected with the negative pole of infrared LED module by inductance L 3, the LX pin of chip U1 is also connected with the positive pole of diode D1, the LX pin of chip U1 is also successively by electric capacity C7, resistance R10 is connected with diode D2 negative pole, positive pole access one first direct voltage of diode D2, the negative pole of diode D1 is connected with the negative pole of diode D2, the negative pole of diode D2 is also connected with the VIN pin of chip U1, the Isense pin of chip U1 is connected with the positive pole of infrared LED module, the GND pin ground connection of chip U1, the VIN pin of chip U1 is also by electric capacity C12 ground connection, the negative pole of diode D2 is also by electric capacity C8 ground connection, one end of first resistance is connected with the positive pole of infrared LED module, and the other end is connected with the negative pole of diode D1, the 2nd I/O mouth of MCU also accesses one second direct voltage by a resistance R12.
Preferably, described first direct voltage is+12V.
Preferably, described second direct voltage is+3.3V.
Preferably, described first resistance comprises resistance R8 and resistance R9, and resistance R8 and resistance R9 is connected in parallel.
Preferably, the positive pole of infrared LED module is connected with its negative pole by an electric capacity C10.
Preferably, the positive pole of infrared LED module is by an electric capacity C11 ground connection.
Preferably, the negative pole of infrared LED module is by an electric capacity C9 ground connection.
Preferably, an I/O mouth of MCU is also by a resistance R13 ground connection.
Preferably, described electric capacity C8 is polar capacitor, and the positive pole of electric capacity C8 is connected with the negative pole of diode D2, the minus earth of electric capacity C8.
Preferably, the encapsulating structure of described chip U1 is SOP8 or S0T23-6.
The utility model has following beneficial effect:
The current ratio used due to infrared LED module is comparatively large, and therefore, the chip of drive circuit adopts T6322, and its feature is: operating temperature range can work between-40 DEG C ~ 125 DEG C; Caloric value is little, wide input voltage (7V-30V), and electric current, up to 1500mA, has enable control pin (EN), and available common I/O mouth controls the keying of infrared LED module; Feature maximum is in addition that parameter by changing peripheral resistance (R8, R9 of Fig. 1) is to regulate the brightness of infrared LED module, can significantly raise the efficiency and simplify circuit design like this, more can provide stable constant current function, extend the useful life of infrared LED module.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model preferred embodiment;
Fig. 2 is the circuit diagram of the drive circuit of the utility model preferred embodiment.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further.
Shown in composition graphs 1 and Fig. 2, be applied to the LED Drive and Control Circuit of web camera, it comprises the optical inductor, MCU, drive circuit and the infrared LED module that connect successively.
Wherein, described drive circuit comprises chip U1, diode D1, diode D2, electric capacity C7, electric capacity C8, electric capacity C12, electric capacity C6, the first resistance, resistance R10, resistance R11, inductance L 3 and triode Q1; The model of described chip U1 is T6322.
The EN pin (Enable Pin) of chip U1 is connected with an I/O mouth of MCU, the ADJ pin (pulse signal input terminal) of chip U1 is connected with the collector electrode of triode Q1, the grounded emitter of triode Q1, the base stage of triode Q1 is connected by the 2nd I/O mouth of resistance R11 and MCU, the LX pin (negative pole constant current output end) of chip U1 is by electric capacity C6 ground connection, the LX pin of chip U1 is also connected with the negative pole DR-of infrared LED module by inductance L 3, the LX pin of chip U1 is also connected with the positive pole of diode D1, the LX pin of chip U1 is also successively by electric capacity C7, resistance R10 is connected with diode D2 negative pole, positive pole access one first direct voltage of diode D2, the negative pole of diode D1 is connected with the negative pole of diode D2, the negative pole of diode D2 is also connected with the VIN pin (power input) of chip U1, the Isense pin (positive pole constant current output end) of chip U1 is connected with the positive pole DR+ of infrared LED module, the GND pin ground connection of chip U1, the VIN pin of chip U1 is also by electric capacity C12 ground connection, the negative pole of diode D2 is also by electric capacity C8 ground connection, one end of first resistance is connected with the positive pole DR+ of infrared LED module, and the other end is connected with the negative pole of diode D1.The 2nd I/O mouth of MCU also accesses one second direct voltage by a resistance R12.
Described first direct voltage is+12V.Described second direct voltage is+3.3V.Described first resistance comprises resistance R8 and resistance R9, and resistance R8 and resistance R9 is connected in parallel.The positive pole DR+ of infrared LED module is connected with its negative pole by an electric capacity C10.The positive pole DR+ of infrared LED module is by an electric capacity C11 ground connection.The negative pole DR-of infrared LED module is by an electric capacity C9 ground connection.The 2nd I/O mouth of MCU is also by a resistance R12 ground connection.The one I/O mouth of MCU is also by a resistance R13 ground connection.Described electric capacity C8 is polar capacitor, and the positive pole of electric capacity C8 is connected with the negative pole of diode D2, the minus earth of electric capacity C8.
The encapsulating structure of the chip U1 of the present embodiment is SOP8 (also can adopt S0T23-6), and therefore, the LX pin of the chip U1 of the present embodiment comprises LX1 pin and LX2 pin, and GND pin comprises GND1 pin and GND2 pin.
The optical inductor of the present embodiment can be photo resistance.
The present embodiment carrys out control switch signal according to the magnitude of voltage of photo resistance.Such as, when the magnitude of voltage of photo resistance reaches more than 1.3 volts, an I/O mouth of MCU exports a high level to the EN pin (Enable Pin) of chip U1, the now bright infrared LED module in chip U1 cut-in point; Otherwise, when the magnitude of voltage of photo resistance then closes infrared LED module lower than when less than 1.3 volts, open luminous by the time period of specifying to make infrared LED module and close alternation.
The level signal of the one I/O mouth of MCU can control, and can regulate level signal arbitrarily as required, thus makes infrared LED module carry out circulation unlatching luminescence according to the cycle of specifying and close.
Infrared LED module works in level control state, and the constant current that effective projection distance and chip U1 due to LED projection light export is directly proportional, and only needs the parameter of regulating resistance R8, resistance R9, just can increase the projection distance of infrared LED module.Adopt T6322 to drive infrared LED module, instantaneous operating current is large, greatly can strengthen the projection distance of infrared LED module; Infrared LED module adopts the I/O mouth control mode of MCU, and the operating time of unit period is short, relatively extends the useful life of infrared LED module.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the utility model claim.
Claims (10)
1. be applied to the LED Drive and Control Circuit of web camera, it is characterized in that, comprise the optical inductor, MCU, drive circuit and the infrared LED module that connect successively, wherein, described drive circuit comprises chip U1, diode D1, diode D2, electric capacity C7, electric capacity C8, electric capacity C12, electric capacity C6, the first resistance, resistance R10, resistance R11, inductance L 3 and triode Q1, the model of described chip U1 is T6322, the EN pin of chip U1 is connected with an I/O mouth of MCU, the ADJ pin of chip U1 is connected with the collector electrode of triode Q1, the grounded emitter of triode Q1, the base stage of triode Q1 is connected by the 2nd I/O mouth of resistance R11 and MCU, the LX pin of chip U1 is by electric capacity C6 ground connection, the LX pin of chip U1 is also connected with the negative pole of infrared LED module by inductance L 3, the LX pin of chip U1 is also connected with the positive pole of diode D1, the LX pin of chip U1 is also successively by electric capacity C7, resistance R10 is connected with diode D2 negative pole, positive pole access one first direct voltage of diode D2, the negative pole of diode D1 is connected with the negative pole of diode D2, the negative pole of diode D2 is also connected with the VIN pin of chip U1, the Isense pin of chip U1 is connected with the positive pole of infrared LED module, the GND pin ground connection of chip U1, the VIN pin of chip U1 is also by electric capacity C12 ground connection, the negative pole of diode D2 is also by electric capacity C8 ground connection, one end of first resistance is connected with the positive pole of infrared LED module, and the other end is connected with the negative pole of diode D1, the 2nd I/O mouth of MCU also accesses one second direct voltage by a resistance R12.
2. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, described first direct voltage is+12V.
3. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, described second direct voltage is+3.3V.
4. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, described first resistance comprises resistance R8 and resistance R9, and resistance R8 and resistance R9 is connected in parallel.
5. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, the positive pole of infrared LED module is connected with its negative pole by an electric capacity C10.
6. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, the positive pole of infrared LED module is by an electric capacity C11 ground connection.
7. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, the negative pole of infrared LED module is by an electric capacity C9 ground connection.
8. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, an I/O mouth of MCU is also by a resistance R13 ground connection.
9. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, described electric capacity C8 is polar capacitor, and the positive pole of electric capacity C8 is connected with the negative pole of diode D2, the minus earth of electric capacity C8.
10. be applied to the LED Drive and Control Circuit of web camera as claimed in claim 1, it is characterized in that, the encapsulating structure of described chip U1 is SOP8 or S0T23-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350661.2U CN204069417U (en) | 2014-06-26 | 2014-06-26 | Be applied to the LED Drive and Control Circuit of web camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350661.2U CN204069417U (en) | 2014-06-26 | 2014-06-26 | Be applied to the LED Drive and Control Circuit of web camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204069417U true CN204069417U (en) | 2014-12-31 |
Family
ID=52210853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420350661.2U Expired - Fee Related CN204069417U (en) | 2014-06-26 | 2014-06-26 | Be applied to the LED Drive and Control Circuit of web camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204069417U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472264A (en) * | 2015-11-25 | 2016-04-06 | 杭州意博高科电器有限公司 | LED light supplement control circuit used for roller-shutter-type shutter exposure camera |
| CN110784656A (en) * | 2018-07-13 | 2020-02-11 | 宏海微电子股份有限公司 | Photographic infrared LED lamp panel device with internet of things control capability |
-
2014
- 2014-06-26 CN CN201420350661.2U patent/CN204069417U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472264A (en) * | 2015-11-25 | 2016-04-06 | 杭州意博高科电器有限公司 | LED light supplement control circuit used for roller-shutter-type shutter exposure camera |
| CN105472264B (en) * | 2015-11-25 | 2018-09-14 | 浙江意博高科技术有限公司 | A kind of belt-type shutter exposure camera LED light filling control circuits |
| CN110784656A (en) * | 2018-07-13 | 2020-02-11 | 宏海微电子股份有限公司 | Photographic infrared LED lamp panel device with internet of things control capability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103442486B (en) | High-luminance LED strobe lamp | |
| CN203399372U (en) | Solar energy LED street lamp controller for sensing weather | |
| CN101917795A (en) | Device and method for supplementing modulated light for face recognition | |
| CN203608406U (en) | Energy-saving LED fill light | |
| CN204069417U (en) | Be applied to the LED Drive and Control Circuit of web camera | |
| CN203537607U (en) | High-luminance LED strobe lamp | |
| CN203596960U (en) | Miniature LED drive circuit and LED lamp having same | |
| CN203934081U (en) | LED lamp drive circuit with light-operated timing | |
| CN103517524B (en) | Led emergency controller | |
| CN204559722U (en) | A kind of mining high definition video collecting system | |
| CN208025385U (en) | A kind of solar lawn lamp and its control circuit | |
| CN201866678U (en) | Infrared-induction solar garden lamp | |
| CN102740530B (en) | A kind of LED signal control circuit, LED signal lamp and LED signal control method | |
| CN104767924A (en) | Mining high-definition video collecting system and method | |
| CN106851920B (en) | A kind of tri-state frequency conversion LED power output power controlling circuit | |
| CN202103892U (en) | Driving power supply for LED street lamp | |
| CN202068615U (en) | Intelligent controller for solar streetlamp | |
| CN204968190U (en) | Automatic dimming system of LED | |
| CN203814005U (en) | LED light modulation circuit with power-on trigger lock memory function | |
| CN203691705U (en) | LED intelligent switch control circuit | |
| CN103024999A (en) | LED (Light-Emitting Diode) stroboscopic light supplement lamp | |
| CN109121247B (en) | Wisdom street lamp control management system | |
| CN204859676U (en) | LED drive arrangement | |
| CN102572280B (en) | Camera and device and method for controlling camera | |
| CN203279247U (en) | Flicker-free LED drive power with high power factor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20190626 |