CN201349347Y - Infrared lamp driving circuit and infrared integrated camera - Google Patents
Infrared lamp driving circuit and infrared integrated camera Download PDFInfo
- Publication number
- CN201349347Y CN201349347Y CNU2009201297804U CN200920129780U CN201349347Y CN 201349347 Y CN201349347 Y CN 201349347Y CN U2009201297804 U CNU2009201297804 U CN U2009201297804U CN 200920129780 U CN200920129780 U CN 200920129780U CN 201349347 Y CN201349347 Y CN 201349347Y
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- infrared
- pulse signal
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- infrared lamp
- drive circuit
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The utility model is applicable to the field of security precaution monitoring cameras and provides an infrared lamp driving circuit and an infrared integrated camera. The infrared lamp driving circuit comprises a visible light sensing unit, a signal comparison module, a pulse signal generator and a constant current driving module, wherein an input end of the signal comparison module is connected with an output end of the visible light sensing unit and outputs a switch control signal according to a visible light sensing signal generated by the visible light sensing unit, the input end of the pulse signal generator is connected to the output end of the signal comparison module and outputs a PWM pulse signal according to the switch control signal, and an enabling end of the constant current driving module is connected to the output end of the pulse signal generator, the output end of the constant current driving module is connected to a driving end of an infrared LED module, and a constant current signal is output according to the PWM pulse signal for driving the infrared LED module to work. The infrared lamp driving circuit adopts the pulse signal generator and the constant current driving module for driving the infrared LED module to work, thereby opening and closing an infrared LED lamp according to a certain frequency cycle and achieving the purposes of saving energy and prolonging the service life of the infrared LED lamp.
Description
Technical field
The utility model belongs to the security monitoring camera field, relates in particular to a kind of infrared lamp drive circuit and infrared integrated camera.
Background technology
The infrared photography technology is divided into passive infrared camera technique and active infrared camera technique at present, wherein, the passive infrared camera technique is to utilize any object more than absolute zero (one 273 ℃) infrared photoemissive principle to be arranged all, because people's health and the infrared light that thermal objects is sent are stronger, the ruddiness that other non-thermal objects is sent is very faint, therefore, utilize special thermal camera just can realize night monitoring; The passive infrared camera technique is owing to the equipment manufacturing cost height and can not reflect ambient conditions, therefore is not used in night vision system.
And the active infrared camera technique is to utilize special " infrared lamp " artificially to produce infrared radiation, produce that human eye be cannot see and infrared light that common camera can capture, radiation " illumination " scenery and environment, utilize video camera or " the infrared low-light (level) colour TV camera " of common low-light (level) CCD B or use " daytime, colored automatic blackening at night was white " to remove to experience the infrared light that surrounding environment reflects, thereby realize night vision function.
Traditional incorporate active infra-red floor light video camera (infrared integrated camera) mainly adopts constant voltage driving or constant-current driving to make that infrared lamp (infrared LED) is luminous, voltage on the infrared lamp or current constant, shortcoming is to rely on supply power voltage to stablize, unsettled voltage will influence the variation of electric current, when transmitting tube temperature rising after-current also can increase, operating current is little, and caloric value is big, and constant-duty cycle is long, decay is fast, the life-span is short.
The utility model content
The purpose of this utility model is to provide a kind of infrared lamp drive circuit, is intended to solve existing infrared lamp drive circuit and adopts the mode of constant current or constant voltage to drive infrared lamp to cause the problem that the infrared lamp constant-duty cycle is long, decay is fast, the life-span is short.
The utility model is achieved in that a kind of infrared lamp drive circuit, comprises the visible light sensing unit; Described infrared lamp drive circuit also comprises:
The signal comparison module, its input is connected with the output of described visible light sensing unit, according to the visible light induced signal output switch control signal of described visible light sensing unit generation;
Pulse signal generator, its input is connected to the output of described signal comparison module, according to described switch controlling signal output pwm pulse signal; And
Constant-current driven module, its Enable Pin is connected to the output of described pulse signal generator, the output of described constant-current driven module is connected to the drive end of infrared LED module, drives the work of described infrared LED module according to described pwm pulse signal output constant current signal.
The purpose of this utility model also is to provide a kind of infrared integrated camera that adopts above-mentioned infrared lamp drive circuit.
The thermal camera that the utility model embodiment provides adopts pulse signal generator and constant-current driven module to drive the work of infrared LED module, make the infrared LED lamp by certain frequency period opening and closing alternation, reached energy-conservation and improved the purpose in the useful life of infrared LED lamp; Adopt the visible light-sensitive device that meets the ROHS standard, environmental protection simultaneously.
Description of drawings
Fig. 1 is the structural representation of the infrared lamp drive circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The infrared lamp drive circuit that the utility model embodiment provides adopts pulse signal generator and constant-current driven module to drive the infrared LED module, make the infrared LED lamp circulate and open alternation pattern luminous and that close, energy-conservation and useful life of having improved the infrared LED lamp by certain frequency period.
The infrared lamp drive circuit that the utility model embodiment provides is applied in the infrared integrated camera, and infrared integrated camera can be widely used in places such as bank, hotel, market, office building, hospital, school, post office, government department, accounting office, charge station, warehouse, can also be applied under the environment such as white mist, halation, aqueous vapor, oil gas, rainy day.Its structural representation for convenience of explanation, only shows the part relevant with the utility model embodiment as shown in Figure 1, and details are as follows.
The infrared lamp drive circuit comprises: visible light sensing unit 10, signal comparison module 11, pulse signal generator 12 and constant-current driven module 13 are wherein, the input of signal comparison module 11 is connected with the output of visible light sensing unit 10, according to the visible light induced signal output switch control signal of visible light according to the sensing unit generation; The input of pulse signal generator 12 is connected to the output of signal comparison module 11, according to switch controlling signal output pulse width modulation (PWM, Pulse Width Modulation) pulse signal; The Enable Pin of constant-current driven module 13 is connected to the output of pulse signal generator 12, the output of constant-current driven module 13 is connected to the drive end of infrared LED module 14, drives described infrared LED module 14 work according to pwm pulse signal output constant current signal.
In the utility model embodiment, visible light sensing unit 10 produces sensor current signal according to the visual intensity of sensing, and signal comparison module 11 compares sensor current signal and reference level, produces switching signal according to comparative result; Switching signal control wave generator 12 produces the Enable Pin of pwm pulse signal control constant-current driven module 13; Constant-current driven module 13 output constant current signal drive infrared LED module 14 and light, and the infrared LED lamp is opened luminous by assigned frequency and closed alternation.As an embodiment of the present utility model, the EDM Generator of Adjustable Duty Ratio of pwm pulse signal is opened luminous and is closed thereby the duty ratio that can regulate pwm pulse signal as required arbitrarily makes the infrared LED lamp circulate according to the specified frequency cycle.
In the utility model embodiment, visible light sensing unit 10 is the environment-friendly type photo sensor device.As an embodiment of the present utility model, the environment-friendly type photo sensor device is the PT photodiode; Meet international ROHS standard; ROHS (Restriction of Hazardous Substances) is a compulsory standard of being formulated by European Union's legislation, and full name is " about being limited in the instruction of using some harmful components in the electronic and electrical equipment "; This standard is implemented in beginning on July 1st, 2006 is formal, is mainly used in the material and the technological standards of standard electronic and electrical equipment, makes it to help more health and environmental protection; The purpose of this standard is to eliminate lead, mercury, cadmium, Cr VI, Polybrominated biphenyl and Poly Brominated Diphenyl Ethers totally 6 materials in the motor electronic product, and emphasis has stipulated that plumbous content can not surpass 1%.Simultaneously, visible light sensing unit 10 is adopted the photosensitive cover parcel of silicon materials.
Be in normal bright state with infrared lamp on the infrared lamp drive circuit of routine compares always, infrared lamp drive circuit that the utility model embodiment provides adopts pulse driving circuit to make infrared lamp take to circulate by certain frequency period and opens luminous and cut out the alternation pattern, can also recently change infrared lamp simultaneously by the duty of regulating pwm pulse signal and open luminous and close frequency alternately; Strengthened infrared lamp luminous intensity of illumination of moment by adjusting output current; Alternate run has improved infrared lamp useful life and energy-conservation; It is working properly that the constant current signal of constant-current driven module 13 outputs guarantees that extraneous input voltage remains infrared lamp when changing, and operating current is constant.
In the utility model embodiment, signal comparison module 11 also comprises feedback end, and the feedback end of signal comparison module is connected with the control end of visible light sensing unit 10, and the illumination induced signal is compensated, and improves induction precision.
In the utility model embodiment, the infrared LED lamp works in pulse condition, and effective projection distance of pulse projection light is directly proportional with the peak current of pulse, only need improve peak current as far as possible, just can increase the projection distance of infrared LED lamp; Adopt the infrared LED lamp of pulsed drive, instantaneous operating current is big, can strengthen the projection distance of infrared LED lamp greatly; Make the infrared LED lamp produce the pulse projection light, only need on driving tube, to add the pulse voltage of certain frequency.The infrared LED lamp adopts the working method of pulse, and the operating time of unit period is short, has prolonged the useful life of infrared LED lamp relatively.
In the utility model embodiment, infrared driver circuit adopts constant-current pulse drive controlling formula infrared technique to replace traditional constant voltage or constant-current drive technology control infrarede emitting diode (LED) is luminous, produce the infrared lamp of the needed enough light intensity of auxiliary camera night illumination, caloric value is little, energy-conservation and long service life; The light-sensitive device (PT) that employing meets the ROHS standard has replaced traditional photo resistance (CDS) and has been applied to infrared night vision control, and environmental protection improves product reliability,
The thermal camera that the utility model embodiment provides adopts pulse signal generator and constant-current driven module to drive the work of infrared LED module, make the infrared LED lamp by certain frequency period opening and closing alternation, reached energy-conservation and improved the purpose in the useful life of infrared LED lamp; Adopt the visible light-sensitive device that meets the ROHS standard, environmental protection simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1, a kind of infrared lamp drive circuit comprises the visible light sensing unit; It is characterized in that described infrared lamp drive circuit also comprises:
The signal comparison module, its input is connected with the output of described visible light sensing unit, according to the visible light induced signal output switch control signal of described visible light sensing unit generation;
Pulse signal generator, its input is connected to the output of described signal comparison module, according to described switch controlling signal output pwm pulse signal; And
Constant-current driven module, its Enable Pin is connected to the output of described pulse signal generator, the output of described constant-current driven module is connected to the drive end of infrared LED module, drives the work of described infrared LED module according to described pwm pulse signal output constant current signal.
2, infrared lamp drive circuit as claimed in claim 1 is characterized in that, described visible light sensing unit is the environment-friendly type photo sensor device.
3, infrared lamp drive circuit as claimed in claim 2 is characterized in that, described environment-friendly type photo sensor device is the PT photodiode.
4, infrared lamp drive circuit as claimed in claim 1 is characterized in that, described signal comparison module also comprises feedback end, and the feedback end of described signal comparison module is connected with the control end of described illumination sensing unit, and described illumination induced signal is compensated.
5, infrared lamp drive circuit as claimed in claim 1 is characterized in that, described pulse signal generator is the pulse signal generator of the EDM Generator of Adjustable Duty Ratio of pwm pulse signal.
6, a kind of infrared integrated camera, it comprises the infrared lamp drive circuit, it is characterized in that, described infrared lamp drive circuit adopts each described infrared lamp drive circuit of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201297804U CN201349347Y (en) | 2009-01-22 | 2009-01-22 | Infrared lamp driving circuit and infrared integrated camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201297804U CN201349347Y (en) | 2009-01-22 | 2009-01-22 | Infrared lamp driving circuit and infrared integrated camera |
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| CN201349347Y true CN201349347Y (en) | 2009-11-18 |
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| CNU2009201297804U Expired - Fee Related CN201349347Y (en) | 2009-01-22 | 2009-01-22 | Infrared lamp driving circuit and infrared integrated camera |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795521A (en) * | 2010-04-13 | 2010-08-04 | 东莞市巨旭灯饰有限公司 | Touch-type touch control switch |
| CN102196625A (en) * | 2010-03-11 | 2011-09-21 | 立锜科技股份有限公司 | Led control circuit and method |
| WO2012024961A1 (en) * | 2010-08-24 | 2012-03-01 | 汉王科技股份有限公司 | Human facial identification method and system, as well as infrared backlight compensation method and system |
| CN103002641A (en) * | 2012-11-23 | 2013-03-27 | 天津天地伟业数码科技有限公司 | Infrared lamp driving circuit, method and circuit board |
| CN103747581A (en) * | 2013-12-31 | 2014-04-23 | 深圳英飞拓科技股份有限公司 | Infrared lamp control module on basis of 555 timer and infrared camera |
| CN105282896A (en) * | 2014-05-27 | 2016-01-27 | 宁波高新区赛尔富电子有限公司 | Power supply control circuit of LED lamp |
| CN106534712A (en) * | 2016-10-24 | 2017-03-22 | 北京旷视科技有限公司 | Control method, image processing unit, light-filling and camera device |
| CN106572293A (en) * | 2015-10-09 | 2017-04-19 | 阔展科技(深圳)有限公司 | Method and device for saving power for camera with infrared LED lamp |
| CN109005320A (en) * | 2018-08-01 | 2018-12-14 | 惠州市德赛西威汽车电子股份有限公司 | A kind of driver monitors infrared camera device and image brightness control method |
| CN110324538A (en) * | 2019-07-25 | 2019-10-11 | 浙江沃得尔科技股份有限公司 | A kind of vehicle mounted infrared camera system |
| WO2020024603A1 (en) * | 2018-08-01 | 2020-02-06 | Oppo广东移动通信有限公司 | Image processing method and apparatus, electronic device, and computer readable storage medium |
| CN114584711A (en) * | 2022-03-01 | 2022-06-03 | 上海富瀚微电子股份有限公司 | Monitoring system is device in coordination in car |
| CN110324538B (en) * | 2019-07-25 | 2024-04-23 | 浙江沃德尔科技集团股份有限公司 | Vehicle-mounted infrared camera system |
-
2009
- 2009-01-22 CN CNU2009201297804U patent/CN201349347Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196625A (en) * | 2010-03-11 | 2011-09-21 | 立锜科技股份有限公司 | Led control circuit and method |
| CN102196625B (en) * | 2010-03-11 | 2015-02-11 | 立锜科技股份有限公司 | Led control circuit and method |
| CN101795521A (en) * | 2010-04-13 | 2010-08-04 | 东莞市巨旭灯饰有限公司 | Touch-type touch control switch |
| WO2012024961A1 (en) * | 2010-08-24 | 2012-03-01 | 汉王科技股份有限公司 | Human facial identification method and system, as well as infrared backlight compensation method and system |
| US9245174B2 (en) | 2010-08-24 | 2016-01-26 | Hanwang Technology Co., Ltd. | Human facial identification method and system, as well as infrared backlight compensation method and system |
| CN103002641A (en) * | 2012-11-23 | 2013-03-27 | 天津天地伟业数码科技有限公司 | Infrared lamp driving circuit, method and circuit board |
| CN103002641B (en) * | 2012-11-23 | 2014-12-03 | 天津天地伟业数码科技有限公司 | Method for driving infrared lamp of infrared lamp driving circuit |
| CN103747581A (en) * | 2013-12-31 | 2014-04-23 | 深圳英飞拓科技股份有限公司 | Infrared lamp control module on basis of 555 timer and infrared camera |
| CN105282896A (en) * | 2014-05-27 | 2016-01-27 | 宁波高新区赛尔富电子有限公司 | Power supply control circuit of LED lamp |
| CN106572293A (en) * | 2015-10-09 | 2017-04-19 | 阔展科技(深圳)有限公司 | Method and device for saving power for camera with infrared LED lamp |
| CN106534712A (en) * | 2016-10-24 | 2017-03-22 | 北京旷视科技有限公司 | Control method, image processing unit, light-filling and camera device |
| CN109005320A (en) * | 2018-08-01 | 2018-12-14 | 惠州市德赛西威汽车电子股份有限公司 | A kind of driver monitors infrared camera device and image brightness control method |
| WO2020024603A1 (en) * | 2018-08-01 | 2020-02-06 | Oppo广东移动通信有限公司 | Image processing method and apparatus, electronic device, and computer readable storage medium |
| US10929988B2 (en) | 2018-08-01 | 2021-02-23 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for processing image, and electronic device |
| CN110324538A (en) * | 2019-07-25 | 2019-10-11 | 浙江沃得尔科技股份有限公司 | A kind of vehicle mounted infrared camera system |
| CN110324538B (en) * | 2019-07-25 | 2024-04-23 | 浙江沃德尔科技集团股份有限公司 | Vehicle-mounted infrared camera system |
| CN114584711A (en) * | 2022-03-01 | 2022-06-03 | 上海富瀚微电子股份有限公司 | Monitoring system is device in coordination in car |
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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: 20091118 Termination date: 20180122 |