CN205541826U - Screen back of body light controlling circuit and display device - Google Patents
Screen back of body light controlling circuit and display device Download PDFInfo
- Publication number
- CN205541826U CN205541826U CN201620202692.2U CN201620202692U CN205541826U CN 205541826 U CN205541826 U CN 205541826U CN 201620202692 U CN201620202692 U CN 201620202692U CN 205541826 U CN205541826 U CN 205541826U
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- CN
- China
- Prior art keywords
- screen
- control circuit
- display device
- driving chip
- photoelectrical coupler
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model provides a screen back of body light controlling circuit and display device, the circuit includes: the infrared emission end sets up in the front of display device's screen for the transmission infrared ray, infrared receiving terminal, set up in the front of screen is used for receiving the warp object before the screen reflects back the infrared ray to outlet driving signal, control circuit receives drive signal control the line work in a poor light of screen lights the lamp strip of screen. Through the shutoff of controlling the circuit in a poor light of power in the complete machine with the infra red ray induction mode, through the change that detects human infrared spectrum, automatically connect load, user's non -disjunction response scope will continuously be put through, and the people leaves the back, turn -offs the circuit that is shaded, solve display device's screen and can initiatively not close when idle, lead to the extravagant problem of the energy.
Description
Technical field
This utility model relates to field of display, particularly relates to a kind of screen backlight control circuit and display device.
Background technology
At present liquid crystal display or the main power consuming portions of LCD TV complete machine is exactly screen lamp bar, the backlight drive circuit in i.e. the circuit of some bright light bar is electrically.When before user frames out, generally will not actively close screen, the backlight of screen is still lighted, and can produce bigger waste, does not meets the requirement of environmental protection and energy saving.
Utility model content
This utility model purpose is to provide a kind of screen backlight control circuit, it is intended to the screen of solution display device will not actively be closed when leaving unused, the problem causing energy waste.
This utility model provides a kind of screen backlight control circuit, including:
Infrared emission end, is arranged at the front of the screen of display device, is used for launching infrared ray；
Infrared receiver end, is arranged at the front of described screen, for receiving the described infrared ray that the object before described screen is reflected back, and output drive signal；
Control circuit, receives described driving signal and controls the backlight line work of described screen, light the lamp bar of described screen.
Preferably, described infrared emission end is arranged at the frame in described screen front.
Preferably, described infrared receiver end is arranged at the frame in described screen front.
Preferably, described infrared receiver end included filter and CCD-detector, described crossed the surface that filter is arranged at the frame in described screen front, and described CCD-detector is relative with described filter excessively in being arranged at described frame, and is connected with described control circuit.
Preferably, described control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, wherein:
The luminous source input of described photoelectrical coupler and the outfan of described CCD-detector, receive described driving signal, the luminous source outfan of described photoelectrical coupler passes through the first resistance eutral grounding, the input of the light-receiving device of described photoelectrical coupler terminates a control level signal, the outfan of the light-receiving device of described photoelectrical coupler passes through the second resistance eutral grounding, and the first input end of described driving chip is connect by the 3rd resistance, second input termination pwm signal of described driving chip, described driving chip and described backlight connection；
The first input end of described driving chip and the second input are by described voltage regulation unit ground connection.
This utility model additionally provides a kind of display device, and including screen and screen backlight control circuit, described screen backlight control circuit includes:
Infrared emission end, is arranged at the front of the screen of display device, is used for launching infrared ray；
Infrared receiver end, is arranged at the front of described screen, for receiving the described infrared ray that the object before described screen is reflected back, and output drive signal；
Control circuit, receives described driving signal and controls the backlight line work of described screen, light the lamp bar of described screen.
Preferably, described infrared emission end is arranged at the frame in described screen front.
Preferably, described infrared receiver end is arranged at the frame in described screen front.
Preferably, described infrared receiver end included filter and CCD-detector, described crossed the surface that filter is arranged at the frame in described screen front, and described CCD-detector is relative with described filter excessively in being arranged at described frame, and is connected with described control circuit.
Preferably, described control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, wherein:
The luminous source input of described photoelectrical coupler and the outfan of described CCD-detector, receive described driving signal, the luminous source outfan of described photoelectrical coupler passes through the first resistance eutral grounding, the input of the light-receiving device of described photoelectrical coupler terminates a control level signal, the outfan of the light-receiving device of described photoelectrical coupler passes through the second resistance eutral grounding, and the first input end of described driving chip is connect by the 3rd resistance, second input termination pwm signal of described driving chip, described driving chip and described backlight connection；
The first input end of described driving chip and the second input are by described voltage regulation unit ground connection.
Above-mentioned screen backlight control circuit and display device can be by controlling the shutoff of the backlight circuit of power supply in complete machine by infrared induction mode, by detecting the change of the infrared spectrum of human body, turn on automatically loads, user is without departing from induction range, to be continuously turned on, after people leaves, turn off backlight circuit, solve when the screen of display device leaves unused and will not actively close, the problem causing energy waste.
Accompanying drawing explanation
Fig. 1 is screen backlight control circuit module diagram in this utility model preferred embodiment；
Fig. 2 is the screen construction schematic diagram of display device in this utility model preferred embodiment；
Fig. 3 is that screen backlight control circuit middle infrared (Mid-IR) shown in Fig. 1 is launched and receives the structural representation of parts；
Fig. 4 is the circuit theory diagrams of control circuit in screen backlight control circuit shown in Fig. 1.
Detailed description of the invention
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Referring to Fig. 1, Fig. 2 and Fig. 3, in this utility model preferred embodiment, screen backlight control circuit includes infrared emission end 11, infrared receiver end 12 and control circuit 13.
Infrared emission end 11 is arranged at the front of the screen 20 of display device, is used for launching infrared ray 112；Infrared receiver end 12 is arranged at the front of described screen 20, for receiving the described infrared ray 112 that the object 30 before described screen 20 is reflected back, and output drive signal (with reference to Fig. 3)；Control circuit 13 receives the backlight circuit 21 of the described driving signal described screen 20 of control and works, and lights the lamp bar of described screen 20.
Preferably, referring to Fig. 2 and Fig. 3, described infrared emission end 11 is arranged at the frame 22 in described screen 20 front.Described infrared receiver end 12 is arranged at the frame 22 in described screen 20 front.Specifically, infrared emission end 11 and infrared receiver end 12 towards with screen 20 towards identical.
Preferably, described infrared receiver end 12 included filter 122 and CCD-detector 124, described filter 122 of crossing is arranged at the surface of frame 22 in described screen 20 front, and described CCD-detector 124 is relative with described filter 122 excessively in being arranged at described frame 22, and is connected with described control circuit 13.
Preferably, referring to Fig. 4, described control circuit 13 includes photoelectrical coupler 131, voltage regulation unit 132 and a driving chip 133.
The luminous source input of described photoelectrical coupler 131 and the outfan of described CCD-detector 124, receive described driving signal, the luminous source outfan of described photoelectrical coupler 131 passes through the first resistance R1 ground connection, the input of the light-receiving device of described photoelectrical coupler 131 terminates a control level signal PSON, the outfan of the light-receiving device of described photoelectrical coupler 131 passes through the second resistance R2 ground connection, and the first input end of described driving chip 133 is connect by the 3rd resistance R3, second input termination pwm signal of described driving chip 133, described driving chip 133 is connected with described backlight circuit 21；The first input end of described driving chip 133 and the second input are by described voltage regulation unit 132 ground connection.
nullWhen object is in region of ultra-red，The transmitting light of infrared emitting end 11 detects object，Then reflection light is transmitted in CCD-detector 124 (integrated circuit processor) by filter 122，Signal is after treatment，Launch a signal to control circuit 13 receiving terminal，Receiving terminal is received order and is given to a foot of optocoupler 131 by amplification treatment circuit one voltage of output，1.2 foot induction of signal of optocoupler 131 are to optocoupler 3.4 foot，Turn it on，Optocoupler 3 foot is to connect control level signal PSON signal (high level)，After conducting, high level voltage flows to optocoupler 4 foot first input end by the first resistance R1 to driving chip 133，Because receiving pwm signal before the second input termination pwm signal of driving chip 133 always，Also it is being high level plus present first input end，Backlight circuit 21 is started working，Point bright light bar，I.e. backlight is bright，Otherwise backlight is extinguished.
In the present embodiment, driving chip 133 can be constant-current driven chip, and first input end can be to trigger end, and when receiving the triggering signal of high level, driving chip 133 drives backlight circuit 21 to work.
Above-mentioned screen backlight control circuit can be by controlling the shutoff of the backlight circuit of power supply in complete machine by infrared induction mode, by detecting the change of the infrared spectrum of human body, turn on automatically loads, user is without departing from induction range, to be continuously turned on, after people leaves, turn off backlight circuit, solve when the screen of display device leaves unused and will not actively close, the problem causing energy waste.
Additionally, refer to Fig. 1-4, also disclose a kind of display device and include that screen 20 and screen 20 backlight control circuit 13, described screen 20 backlight control circuit 13 include:
Infrared emission end 11, is arranged at the front of the screen 20 of display device, is used for launching infrared ray 112；
Infrared receiver end 12, is arranged at the front of described screen 20, for receiving the described infrared ray 112 that the object before described screen 20 is reflected back, and output drive signal；
Control circuit 13, the backlight circuit 21 receiving the described driving signal described screen 20 of control works, and lights the lamp bar of described screen 20.
Preferably, described infrared emission end 11 is arranged at the frame 22 in described screen 20 front.
Preferably, described infrared receiver end 12 is arranged at the frame 22 in described screen 20 front.
Preferably, described infrared receiver end 12 included filter 122 and CCD-detector 124, described filter 122 of crossing is arranged at the surface of frame 22 in described screen 20 front, and described CCD-detector 124 is relative with described filter 122 excessively in being arranged at described frame 22, and is connected with described control circuit 13.
Preferably, described control circuit 13 includes photoelectrical coupler 131, voltage regulation unit 132 and a driving chip 133.
The luminous source input of described photoelectrical coupler 131 and the outfan of described CCD-detector 124, receive described driving signal, the luminous source outfan of described photoelectrical coupler 131 passes through the first resistance R1 ground connection, the input of the light-receiving device of described photoelectrical coupler 131 terminates a control level signal PSON, the outfan of the light-receiving device of described photoelectrical coupler 131 passes through the second resistance R2 ground connection, and the first input end of described driving chip 133 is connect by the 3rd resistance R3, second input termination pwm signal of described driving chip 133, described driving chip 133 is connected with described backlight circuit 21；The first input end of described driving chip 133 and the second input are by described voltage regulation unit 132 ground connection.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (10)
1. a screen backlight control circuit, it is characterised in that including:
Infrared emission end, is arranged at the front of the screen of display device, is used for launching infrared ray；
Infrared receiver end, is arranged at the front of described screen, for receiving the described infrared ray that the object before described screen is reflected back, and output drive signal；
Control circuit, receives described driving signal and controls the backlight line work of described screen, light the lamp bar of described screen.
2. screen backlight control circuit as claimed in claim 1, it is characterised in that described infrared emission end is arranged at the frame in described screen front.
3. screen backlight control circuit as claimed in claim 1, it is characterised in that described infrared receiver end is arranged at the frame in described screen front.
4. screen backlight control circuit as claimed in claim 3, it is characterized in that, described infrared receiver end included filter and CCD-detector, described filter excessively is arranged at the surface of the frame in described screen front, described CCD-detector is arranged in described frame relative with described mistake filter, and is connected with described control circuit.
5. screen backlight control circuit as claimed in claim 4, it is characterised in that described control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, wherein:
The luminous source input of described photoelectrical coupler and the outfan of described CCD-detector, receive described driving signal, the luminous source outfan of described photoelectrical coupler passes through the first resistance eutral grounding, the input of the light-receiving device of described photoelectrical coupler terminates a control level signal, the outfan of the light-receiving device of described photoelectrical coupler passes through the second resistance eutral grounding, and the first input end of described driving chip is connect by the 3rd resistance, second input termination pwm signal of described driving chip, described driving chip and described backlight connection；
The first input end of described driving chip and the second input are by described voltage regulation unit ground connection.
6. a display device, including screen, it is characterised in that also include that screen backlight control circuit, described screen backlight control circuit include:
Infrared emission end, is arranged at the front of the screen of display device, is used for launching infrared ray；
Infrared receiver end, is arranged at the front of described screen, for receiving the described infrared ray that the object before described screen is reflected back, and output drive signal；
Control circuit, receives described driving signal and controls the backlight line work of described screen, light the lamp bar of described screen.
7. display device as claimed in claim 6, it is characterised in that described infrared emission end is arranged at the frame in described screen front.
8. display device as claimed in claim 6, it is characterised in that described infrared receiver end is arranged at the frame in described screen front.
9. display device as claimed in claim 8, it is characterized in that, described infrared receiver end included filter and CCD-detector, described filter excessively is arranged at the surface of the frame in described screen front, described CCD-detector is arranged in described frame relative with described mistake filter, and is connected with described control circuit.
10. display device as claimed in claim 9, it is characterised in that described control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, wherein:
The luminous source input of described photoelectrical coupler and the outfan of described CCD-detector, receive described driving signal, the luminous source outfan of described photoelectrical coupler passes through the first resistance eutral grounding, the input of the light-receiving device of described photoelectrical coupler terminates a control level signal, the outfan of the light-receiving device of described photoelectrical coupler passes through the second resistance eutral grounding, and the first input end of described driving chip is connect by the 3rd resistance, second input termination pwm signal of described driving chip, described driving chip and described backlight connection；
The first input end of described driving chip and the second input are by described voltage regulation unit ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202692.2U CN205541826U (en) | 2016-03-16 | 2016-03-16 | Screen back of body light controlling circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202692.2U CN205541826U (en) | 2016-03-16 | 2016-03-16 | Screen back of body light controlling circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205541826U true CN205541826U (en) | 2016-08-31 |
Family
ID=56782756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620202692.2U Withdrawn - After Issue CN205541826U (en) | 2016-03-16 | 2016-03-16 | Screen back of body light controlling circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205541826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105654912A (en) * | 2016-03-16 | 2016-06-08 | 重庆惠科金扬科技有限公司 | Screen backlight control circuit and display device |
-
2016
- 2016-03-16 CN CN201620202692.2U patent/CN205541826U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105654912A (en) * | 2016-03-16 | 2016-06-08 | 重庆惠科金扬科技有限公司 | Screen backlight control circuit and display device |
| CN105654912B (en) * | 2016-03-16 | 2019-02-26 | 重庆惠科金扬科技有限公司 | A kind of screen backlight control circuit and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20190226 |
|
| AV01 | Patent right actively abandoned |