CN202773130U - Infrared camera and infrared light modulation circuit thereof - Google Patents
Infrared camera and infrared light modulation circuit thereof Download PDFInfo
- Publication number
- CN202773130U CN202773130U CN201220368805.8U CN201220368805U CN202773130U CN 202773130 U CN202773130 U CN 202773130U CN 201220368805 U CN201220368805 U CN 201220368805U CN 202773130 U CN202773130 U CN 202773130U
- Authority
- CN
- China
- Prior art keywords
- switching tube
- current
- limiting resistance
- control
- infrared lamp
- 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
Images
Abstract
The utility model specially relates to an infrared camera and an infrared light modulation circuit thereof, which belong to the field of electronic equipment. According to the infrared camera and the infrared light modulation circuit thereof, the problem that the infrared lamp of a prior infrared camera keeps the largest brightness after being opened is overcome, the brightness of the infrared lamp of the camera can be intelligently adjusted according to the intensity of the ambient light, thereby the work intensity of the infrared lamp is reduced, and the usage life of the infrared lamp is prolonged.
Description
Technical field
The utility model belongs to the electronic equipment field, relates in particular to a kind of thermal camera and infrared light adjusting circuit thereof.
Background technology
Thermal camera has the outstanding advantages such as night visual range is far away, disguised by force, stable performance in rig camera, thereby has occupied most market in night vision monitoring.
Thermal camera in the market when the insufficient light under its operational environment, can automatically open infrared lamp and do the light filling effect, but general infrared lamp can remain in the maximum design brightness after opening always.And the useful life of infrared lamp itself is relevant with the brightness of design, and namely infrared lamp is brighter, working strength is larger, and useful life is just shorter.
The utility model content
The purpose of this utility model is to provide a kind of infrared light adjusting circuit of thermal camera, be intended to solve the infrared lamp that has thermal camera now keeps high-high brightness after opening deficiency, the brightness of infrared lamp is regulated in realization according to the power of ambient light, to reach the working strength that reduces infrared lamp, prolong the infrared lamp purpose in useful life.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of infrared light adjusting circuit of thermal camera comprises:
Sustained diode 1, inductance L 1, photo resistance R1, current-limiting resistance R2, current-limiting resistance R3, current-limiting resistance R4, current-limiting resistance R5, capacitor C 1, infrared lamp D2, Current Control IC1 and switching tube;
The negative electrode of the input of described Current Control IC1 and described sustained diode 1 connects DC power supply simultaneously, described Current Control IC1 output connect simultaneously the anode of described sustained diode 1 and the first end of inductance L 1, the negative pole of the described infrared lamp D2 of the second termination of described inductance L 1, the positive pole of described infrared lamp D2 connects the electric current adjustable side of described Current Control IC1, described capacitor C 1 is attempted by between the both positive and negative polarity of described infrared lamp D2, the electric current adjustable side of described Current Control IC1 connects described DC power supply by described current-limiting resistance R2, the earth terminal ground connection of described Current Control IC1, the cold end of the described switching tube of control termination of described Current Control IC1, described current-limiting resistance R5 is connected between the cold end and ground of described switching tube, the hot end of described switching tube connects described DC power supply by described current-limiting resistance R3, the control end of described switching tube connects described DC power supply by described current-limiting resistance R4, and described photo resistance R1 is connected between the control end and ground of described switching tube.
Particularly, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described switching tube, the hot end of the very described switching tube of current collection of described NPN type triode Q1, the cold end of the very described switching tube of emission of described NPN type triode Q1.
Particularly, described switching tube adopts NMOS pipe Q2, and the grid of described NMOS pipe Q2 is the control end of described switching tube, and the drain electrode of described NMOS pipe Q2 is the hot end of described switching tube, and the source electrode of described NMOS pipe Q2 is the cold end of described switching tube.
Another purpose of the present utility model is to provide a kind of thermal camera, and described thermal camera comprises the infrared light adjusting circuit of above-mentioned any form.
The thermal camera that the utility model provides and infrared light adjusting circuit thereof can be realized the strong and weak brightness of automatically regulating infrared lamp according to ambient light, to reach the working strength that reduces infrared lamp, prolong the infrared lamp purpose in useful life.
Description of drawings
Fig. 1 is the example electronic devices and components figure of the infrared light adjusting circuit of the thermal camera that provides of the utility model the first embodiment;
Fig. 2 is the example electronic devices and components figure of the infrared light adjusting circuit of the thermal camera that provides of the utility model the second embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The infrared light adjusting circuit of the thermal camera that the utility model provides can be realized the strong and weak brightness of automatically regulating infrared lamp according to ambient light, to reach the working strength that reduces infrared lamp, prolongs the infrared lamp purpose in useful life.
Fig. 1 is the example electronic devices and components figure of the infrared light adjusting circuit that provides of the utility model the first embodiment; For convenience of explanation, only show the content relevant with the present embodiment, as shown in the figure:
Described light adjusting circuit comprises:
Sustained diode 1, inductance L 1, photo resistance R1, current-limiting resistance R2, current-limiting resistance R3, current-limiting resistance R4, current-limiting resistance R5, capacitor C 1, infrared lamp D2, Current Control IC1 and switching tube;
The input VIN of Current Control IC1 and the negative electrode of sustained diode 1 connect the 12V DC power supply simultaneously, Current Control IC1 output SW continue the simultaneously anode of stream diode D1 and the first end of inductance L 1, the negative pole of the second termination infrared lamp D2 of inductance L 1, the positive pole of infrared lamp D2 meets the electric current adjustable side SET of Current Control IC1, capacitor C 1 is attempted by between the both positive and negative polarity of infrared lamp D2, the electric current adjustable side SET of Current Control IC1 connects the 12V DC power supply by current-limiting resistance R2, the earth terminal GND ground connection of Current Control IC1, the control end CTRL of Current Control IC1 connects the cold end of switching tube, current-limiting resistance R5 is connected between the cold end and ground of switching tube, the hot end of switching tube connects the 12V DC power supply by current-limiting resistance R3, the control end of switching tube connects the 12V DC power supply by current-limiting resistance R4, and photo resistance R1 is connected between the control end and ground of switching tube.
As the first embodiment of the present utility model, switching tube adopts NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of switching tube, and the current collection of NPN type triode Q1 is the hot end of switching tube very, and the emission of NPN type triode Q1 is the cold end of switching tube very.
Fig. 2 is the example electronic devices and components figure of the infrared light adjusting circuit that provides of the utility model the second embodiment, for convenience of explanation, only shows the content relevant with the present embodiment, as seen from the figure:
The infrared light adjusting circuit that this second embodiment provides is compared with the circuit that above-mentioned the first embodiment provides, the difference of selecting of only having switching tube, as the second embodiment of the present utility model, switching tube adopts NMOS pipe Q2, the grid of NMOS pipe Q2 is the control end of switching tube, the drain electrode of NMOS pipe Q2 is the hot end of switching tube, and the source electrode of NMOS pipe Q2 is the cold end of switching tube.Other circuit parts are identical with the first embodiment, therefore do not give unnecessary details at this.
The below carries out brief description to the operation principle of the infrared light adjusting circuit that the utility model embodiment provides:
Photo resistance R1 is when sensing different light rays intensity, and self-resistance changes, and the voltage by this resistance also has certain excursion.This voltage can the control switch pipe break-make, when the voltage of switch controlled end reached capacity conducting, the voltage of output can change between 0.5-2.5V.And during the voltage control Current Control IC1 of this 0.5-2.5V, the output current of Current Control IC1 output just changes between 60MA-300MA.And the brightness of infrared lamp D2 is to be determined by the size of current of flowing through, and electric current is larger, and brightness is higher, thereby realizes regulating according to the power of ambient light the brightness of infrared lamp D2.
The utility model embodiment also provides a kind of thermal camera, the infrared light adjusting circuit of any form above described thermal camera has comprised.
The thermal camera that the utility model embodiment provides and infrared light adjusting circuit thereof, the infrared lamp that has overcome existing thermal camera keeps the deficiency of high-high brightness after opening, can realize regulating according to the strong and weak intelligence of ambient light the brightness of infrared lamp of vidicon, to reach the working strength that reduces infrared lamp, prolong the infrared lamp purpose in useful life.
The above only is preferred embodiment of the present utility model, not in order to limit the utility model, although with reference to previous embodiment the utility model has been carried out more detailed explanation, for a person skilled in the art, it still can be made amendment or part technical characterictic wherein is equal to replacement the technical scheme that aforementioned each embodiment puts down in writing.All any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. the infrared light adjusting circuit of a thermal camera is characterized in that, described light adjusting circuit comprises:
Sustained diode 1, inductance L 1, photo resistance R1, current-limiting resistance R2, current-limiting resistance R3, current-limiting resistance R4, current-limiting resistance R5, capacitor C 1, infrared lamp D2, Current Control IC1 and switching tube;
The negative electrode of the input of described Current Control IC1 and described sustained diode 1 connects DC power supply simultaneously, described Current Control IC1 output connect simultaneously the anode of described sustained diode 1 and the first end of inductance L 1, the negative pole of the described infrared lamp D2 of the second termination of described inductance L 1, the positive pole of described infrared lamp D2 connects the electric current adjustable side of described Current Control IC1, described capacitor C 1 is attempted by between the both positive and negative polarity of described infrared lamp D2, the electric current adjustable side of described Current Control IC1 connects described DC power supply by described current-limiting resistance R2, the earth terminal ground connection of described Current Control IC1, the cold end of the described switching tube of control termination of described Current Control IC1, described current-limiting resistance R5 is connected between the cold end and ground of described switching tube, the hot end of described switching tube connects described DC power supply by described current-limiting resistance R3, the control end of described switching tube connects described DC power supply by described current-limiting resistance R4, and described photo resistance R1 is connected between the control end and ground of described switching tube.
2. infrared light adjusting circuit as claimed in claim 1, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described switching tube, the hot end of the very described switching tube of current collection of described NPN type triode Q1, the cold end of the very described switching tube of emission of described NPN type triode Q1.
3. infrared light adjusting circuit as claimed in claim 1, it is characterized in that, described switching tube adopts NMOS pipe Q2, the grid of described NMOS pipe Q2 is the control end of described switching tube, the drain electrode of described NMOS pipe Q2 is the hot end of described switching tube, and the source electrode of described NMOS pipe Q2 is the cold end of described switching tube.
4. a thermal camera is characterized in that, described video camera also comprises an infrared light adjusting circuit, and described light adjusting circuit comprises:
Sustained diode 1, inductance L 1, photo resistance R1, current-limiting resistance R2, current-limiting resistance R3, current-limiting resistance R4, current-limiting resistance R5, capacitor C 1, infrared lamp D2, Current Control IC1 and switching tube;
The negative electrode of the input of described Current Control IC1 and described sustained diode 1 connects DC power supply simultaneously, described Current Control IC1 output connect simultaneously the anode of described sustained diode 1 and the first end of inductance L 1, the negative pole of the described infrared lamp D2 of the second termination of described inductance L 1, the positive pole of described infrared lamp D2 connects the electric current adjustable side of described Current Control IC1, described capacitor C 1 is attempted by between the both positive and negative polarity of described infrared lamp D2, the electric current adjustable side of described Current Control IC1 connects described DC power supply by described current-limiting resistance R2, the earth terminal ground connection of described Current Control IC1, the cold end of the described switching tube of control termination of described Current Control IC1, described current-limiting resistance R5 is connected between the cold end and ground of described switching tube, the hot end of described switching tube connects described DC power supply by described current-limiting resistance R3, the control end of described switching tube connects described DC power supply by described current-limiting resistance R4, and described photo resistance R1 is connected between the control end and ground of described switching tube.
5. thermal camera as claimed in claim 4, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described switching tube, the hot end of the very described switching tube of current collection of described NPN type triode Q1, the cold end of the very described switching tube of emission of described NPN type triode Q1.
6. thermal camera as claimed in claim 4, it is characterized in that, described switching tube adopts NMOS pipe Q2, the grid of described NMOS pipe Q2 is the control end of described switching tube, the drain electrode of described NMOS pipe Q2 is the hot end of described switching tube, and the source electrode of described NMOS pipe Q2 is the cold end of described switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220368805.8U CN202773130U (en) | 2012-07-27 | 2012-07-27 | Infrared camera and infrared light modulation circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220368805.8U CN202773130U (en) | 2012-07-27 | 2012-07-27 | Infrared camera and infrared light modulation circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202773130U true CN202773130U (en) | 2013-03-06 |
Family
ID=47779666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220368805.8U Expired - Fee Related CN202773130U (en) | 2012-07-27 | 2012-07-27 | Infrared camera and infrared light modulation circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202773130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781261A (en) * | 2014-02-28 | 2014-05-07 | 深圳英飞拓科技股份有限公司 | Infrared lamp control method for infrared network camera |
-
2012
- 2012-07-27 CN CN201220368805.8U patent/CN202773130U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781261A (en) * | 2014-02-28 | 2014-05-07 | 深圳英飞拓科技股份有限公司 | Infrared lamp control method for infrared network camera |
| CN103781261B (en) * | 2014-02-28 | 2015-12-09 | 深圳英飞拓科技股份有限公司 | The infrared lamp control method of infrared network video camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101657057B (en) | LED power circuit | |
| CN201374838Y (en) | LED driving power source | |
| CN103491682A (en) | Linear switching constant-current LED drive circuit for control over peak current | |
| CN103152895B (en) | The circuit of the direct driving LED of a kind of alternating current | |
| CN204598411U (en) | A kind of LED drove temperature drop current circuit | |
| CN102510605B (en) | Novel LED (light emitting diode) driving circuit and drive method | |
| CN202310206U (en) | Control circuit of ultra-low-power single wire power supply touch switch | |
| CN103683239A (en) | Surge protection circuit | |
| CN103152939A (en) | Four-in-one light-dimming circuit of light-emitting diode (LED) power source | |
| CN205657888U (en) | Auxiliary power circuit , LED drive circuit , LED driver | |
| CN202773130U (en) | Infrared camera and infrared light modulation circuit thereof | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN103068096A (en) | Light-emitting diode (LED) lamp, current sampling circuit and drive circuit of LED lamp | |
| CN202026504U (en) | Driving circuit of light emitting diode (LED) constant current source | |
| CN105101572A (en) | LED (Light Emitting Diode) drive integrated circuit having high power factor | |
| CN201967198U (en) | LED lamp driving power circuit | |
| CN205546091U (en) | LED filament lamp dimmer circuit | |
| CN204119612U (en) | 10w led drive circuit | |
| CN204408665U (en) | Based on control circuit and the appliance working of ambient light line traffic control appliance working switch | |
| CN204761767U (en) | LED's automatic control drive circuit | |
| CN104427686A (en) | Lamp and control circuit thereof | |
| CN104202868B (en) | Control circuit for controlling on and off of working electric appliance based on outside light and working electric appliance | |
| CN201509348U (en) | LED power circuit | |
| CN203193997U (en) | Infrared remote control stepless dimming energy saving lamp | |
| CN203136259U (en) | LED power supply four-in-one light modulation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Yang Document name: Notification that Application Deemed not to be Proposed |
|
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN JINLIN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHINA SECURITY + SURVEILLANCE INTELLIGENCE (PRC), INC. Effective date: 20140417 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518000 SHENZHEN, GUANGDONG PROVINCE TO: 518107 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140417 Address after: 518107 Guangdong province Shenzhen City Guangming Street million Daiheng high tech Industrial Park 5 Building 2 layer, 3 layer, 4 layer Patentee after: Shenzhen Jinlin Technology Co.,Ltd. Address before: 518000 Guangdong province Shenzhen City Guangming Street PENAVICO constant high tech Industrial Park Building 1 building 1-5, building 2, building 1-5, building 3 floor 1-2 Patentee before: CSST CHINA SECURITY & SURVEILLANCE INTELLIGENCE Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20210727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |