CN201749655U - Edge-lit LED backlight control device - Google Patents
Edge-lit LED backlight control device Download PDFInfo
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- CN201749655U CN201749655U CN2010202423883U CN201020242388U CN201749655U CN 201749655 U CN201749655 U CN 201749655U CN 2010202423883 U CN2010202423883 U CN 2010202423883U CN 201020242388 U CN201020242388 U CN 201020242388U CN 201749655 U CN201749655 U CN 201749655U
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- led
- led backlight
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- backlit source
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Abstract
The utility model relates to an edge-lit LED backlight control device, comprising an LED backlight driving control plate which is connected with a group of light sensor units and comprises a MCU control unit and an LED driving unit, wherein a signal input end of the MCU control unit is connected with signal output ends of the light sensor units; a signal output end of the MCU control unit is connected to a signal input end of the LED driving unit, and a control output end of the LED driving unit is connected with a control end of an LED backlight bar. By adopting light sensors to sense the variation of ambient light, the device sends a corresponding control signal to the LED backlight driving control plate, the LED backlight driving control plate then reaches a judgment according to the received control signal to adjust the brightness of the entire backlight, thereby improving power consumption of LED backlight liquid crystal television system and simultaneously reducing uncomfortable watching.
Description
Technical field
The utility model relates to the backlight of LCD technical field, is specifically related to a kind of side light type LED back light source control device.
Background technology
The LCD display technique need realize Presentation Function by backlight as a kind of non-self luminous display technique.Along with the continuous development of lcd technology, the LCD particularly application of colour liquid crystal display device is also constantly being widened.Spurred by the market of LCD, the backlight industry also presents a scene of prosperity.The LED-backlit source has great researching value and meaning as a kind of backlight with development potentiality.After the energy-saving and cost-reducing standard of country was put into effect, the LED-backlit source had tangible competitive edge aspect power consumption, how better to promote the competitive edge of LED-backlit source TV simultaneously.
At present, what the LED-backlit source TV of selling on the market all adopted basically is side-light type white light LEDs backlight, and what the lighting mode in LED-backlit source adopted simultaneously is the lighting mode of Chang Liang.This lighting mode has increased system power dissipation to a certain extent, especially feels more dazzling when watching night, makes eyes feel very uncomfortable.Therefore in order to improve system power dissipation, can alleviate simultaneously and watch uncomfortable phenomenon, need a kind of device that can regulate the brightness of LED-backlit source by the situation of change of optical sensor induced environment light.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of side light type LED back light source control device is provided, this device adopts the variation of optical sensor induced environment light, send control signal corresponding and give LED-backlit source drive controlling plate, drive controlling buttress in LED-backlit source is made the brightness that corresponding judgment is regulated the entire backlight source according to the control signal that receives then, thereby improve the power consumption of LED-backlit source liquid crystal television system, can alleviate simultaneously and watch uncomfortable phenomenon.
The purpose of this utility model solves by the following technical programs: this side light type LED back light source control device, comprise LED-backlit source drive controlling plate, described LED-backlit source drive controlling plate is connected with one group of optical sensor unit, and described LED-backlit source drive controlling plate comprises MCU control module and LED driver element; The signal input part of described MCU control module connects the signal output part of optical sensor unit; The signal output part of MCU control module is connected to the signal input part of LED driver element, and the control output end of described LED driver element is connected with the control end of LED-backlit source bar.
The LED driver element of above-mentioned LED-backlit source drive controlling plate is realized by the LED-backlit source drive chip.
Above-mentioned optical sensor unit is made up of a plurality of optical sensors, and the sensitization contact of a plurality of optical sensors is exposed in the external environment.
Side light type LED back light source control device of the present utility model can be by the light intensity of optical sensor perception external environment, thereby feed back to the MCU control module, thereby the MCU control module can be regulated the brightness in entire backlight source according to the feedback information control LED-backlit source of optical sensor, this device has effectively improved the power consumption of LED-backlit source liquid crystal television system, has alleviated simultaneously to watch uncomfortable phenomenon.
Description of drawings
Fig. 1 is the side light type LED back light source control device.
Wherein: 1 is LED-backlit source bar; 2 is the optical sensor unit; 3 is LED-backlit source drive controlling plate; 4 is the MCU control module; 5 is the LED driver element.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail: referring to Fig. 1: the utility model comprises LED-backlit source drive controlling plate 3 and the one group of optical sensor unit 2 that is connected with LED-backlit source drive controlling plate 3.LED-backlit source drive controlling plate 3 comprises MCU control module 4 and LED driver element 5.The signal input part of MCU control module 4 connects the signal output part of optical sensor unit 2; The signal output part of MCU control module 4 is connected to the signal input part of LED driver element 5, and the control output end of LED driver element 5 is connected with the control end of LED-backlit source bar 1.The LED driver element 5 of LED-backlit of the present utility model source drive controlling plate 3 is realized by the LED-backlit source drive chip.Optical sensor of the present utility model unit 2 is made up of one or more optical sensors, wherein for the extraneous light intensity of perception, the sensitization contact of optical sensor is exposed in the external environment.
Principle of work of the present utility model is as follows: optical sensor is according to the variation of surround lighting in this device, and light signal is converted to electric signal, and the electric signal here is a simulating signal, and it sends to MCU control module 4 in the LED-backlit source drive controlling plate 3 with simulating signal.MCU control module 4 receives and carries out analog to digital conversion after the simulating signal and become digital signal.After software program is handled digital signal, make corresponding selection according to the size of signal, call corresponding backlight brightness values then and write chip for driving in relevant register, LED-backlit source drive controlling plate 3 passes through the control signal that LED driver element 5 generates driving LED backlight lamp bars 1 according to the value of register, comes 1 work of driving LED backlight bar by LED driver element 5.LED-backlit source bar 1 carries out luminous under the driving of LED driver element 5.The control signal that LED driver element 5 sends can be the pulse-width signal of frequency adjustable or the pulse-width signal of fixed-frequency EDM Generator of Adjustable Duty Ratio, and this is selected according to design requirement.According to the variation of pulse-width signal frequency or the dutycycle power consumption that is reduced, and provide the purpose of viewing and admiring comfort level.
In sum, the difference of device of the present utility model and existing LED-backlit source drive plate is, at first adopted the MCU control module, can control flexibly, moreover be that employing special LED backlight driver chip can more accurate control LED-backlit source by software.It has reduced the power consumption of whole TV LED display system on the one hand, has also improved the comfort level of viewing and admiring of TV on the other hand.
Claims (3)
1. side light type LED back light source control device, comprise LED-backlit source drive controlling plate (3), it is characterized in that, described LED-backlit source drive controlling plate (3) is connected with one group of optical sensor unit (2), and described LED-backlit source drive controlling plate (3) comprises MCU control module (4) and LED driver element (5); The signal input part of described MCU control module (4) connects the signal output part of optical sensor unit (2); The signal output part of MCU control module (4) is connected to the signal input part of LED driver element (5), and the control output end of described LED driver element (5) is connected with the control end of LED-backlit source bar (1).
2. side light type LED back light source control device according to claim 1 is characterized in that, the LED driver element (5) of described LED-backlit source drive controlling plate (3) is realized by the LED-backlit source drive chip.
3. side light type LED back light source control device according to claim 1 is characterized in that, described optical sensor unit (2) is made up of one or more optical sensors, and the sensitization contact of described optical sensor is exposed in the external environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202423883U CN201749655U (en) | 2010-06-30 | 2010-06-30 | Edge-lit LED backlight control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202423883U CN201749655U (en) | 2010-06-30 | 2010-06-30 | Edge-lit LED backlight control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749655U true CN201749655U (en) | 2011-02-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202423883U Expired - Fee Related CN201749655U (en) | 2010-06-30 | 2010-06-30 | Edge-lit LED backlight control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201749655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486475A (en) * | 2013-09-27 | 2014-01-01 | 无锡商业职业技术学院 | Luminance-adjustable LED lamp |
-
2010
- 2010-06-30 CN CN2010202423883U patent/CN201749655U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486475A (en) * | 2013-09-27 | 2014-01-01 | 无锡商业职业技术学院 | Luminance-adjustable LED lamp |
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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 |
Granted publication date: 20110216 Termination date: 20150630 |
|
| EXPY | Termination of patent right or utility model |