CN201336752Y - LED backlight automatic adjusting device for liquid crystal - Google Patents
LED backlight automatic adjusting device for liquid crystal Download PDFInfo
- Publication number
- CN201336752Y CN201336752Y CNU2008202283255U CN200820228325U CN201336752Y CN 201336752 Y CN201336752 Y CN 201336752Y CN U2008202283255 U CNU2008202283255 U CN U2008202283255U CN 200820228325 U CN200820228325 U CN 200820228325U CN 201336752 Y CN201336752 Y CN 201336752Y
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- led
- liquid crystal
- master controller
- detecting unit
- led backlight
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Abstract
The utility model relates to an LED backlight module for a liquid crystal display device, in particular to an LED backlight automatic adjusting device for liquid crystal. The utility model is characterized in that the automatic adjusting device comprises an LED temperature detecting unit and an ambient light detecting unit, which are respectively connected with a main controller electrically so that the LED backlight is detected and the collected data is transferred to the main controller; the main controller is connected with a lookup table electrically so that the lookup table is searched according to the data collected from outside and the corresponding processing data is obtained; and the main controller is respectively connected with an LED driving unit and an LED cooling fan electrically so that the processing data is transferred to the LED driving unit and the LED cooling fan to be adjusted. Because matching with the LED backlight module in the display process, the utility model matches with the ambient environment better, thus being more humanized, using resources more efficiently and at the same time prolonging the service life of the LED backlight more efficiently by detecting the temperature and radiating heat forcibly.
Description
Technical field
The utility model relates to a kind of LED-backlit source module of liquid crystal indicator, especially a kind of liquid crystal LED-backlit source automatic regulating apparatus.
Background technology
Present stage, liquid crystal indicator (LCD) has been widely used in the individual consumer's goods such as notebook computer, computer monitor, TV because in light weight, advantages such as volume is little, little power consumption, radiation is low, quality is good are arranged.Because LCD panel itself does not have the characteristics of luminescence, therefore must on the LCD panel, add a light emitting source, can reach display effect, backlight source module promptly provides the optical module of LCD display back light.The LCD backlight source module can use light-emitting diode (LED), cold-cathode fluorescence lamp (CCFL), external electrode fluorescent lamp (EFFL) etc. as light source.
The backlight of large-screen LCD main flow remains CCFL on the market, but along with development of semiconductor, the particularly appearance of high-power LED chip, LED brightness and efficient have had significant raising, make the LED-backlit source more and more be applied to LCD backlight in.Utilizing led light source is that panel backlight has a lot of advantages as LCD panel backlight than with common CCFL.Wherein the most tangible improvement is the expansion of colour gamut.Use LED-backlit to have broader colour gamut, realize more gorgeous color.But also can realize dynamically controlling the RGB mixed light, and between 9600K and 6500K, adjust white balance, and can sacrificing luminance and contrast.
The utility model content
The purpose of this utility model provides a kind of liquid crystal with LED-backlit source automatic regulating apparatus, by this device, can the brightness of backlight be adjusted according to the temperature of surround lighting and LED, can also carry out forced heat radiation under the condition of necessity.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of liquid crystal LED-backlit source automatic regulating apparatus, its special feature is, comprise LED temperature detecting unit and surround lighting detecting unit, thereby both are electrically connected with master controller respectively monitoring and data of collecting are sent to master controller in the LED-backlit source these, master controller is electrically connected with look-up table, thereby the data according to collected outside are searched look-up table, obtain corresponding deal with data, master controller also is electrically connected with LED driver element and LED radiator fan respectively, thereby deal with data is sent to the LED driver element and the LED radiator fan is adjusted.
Wherein the LED temperature detecting unit is a temperature sensor.
Wherein the surround lighting detecting unit is a luminance sensor.
Further, wherein master controller is microprocessor, FPGA or single-chip microcomputer.
Further, wherein look-up table is built-in ROM of master controller or external ROM.
The utility model device cooperated with LED backlight source module is when showing, environment around just can better fit is accomplished more humanely, also utilizes resource more efficiently, simultaneously by monitoring and forced heat radiation to the LED-backlit source temperature, the life-span in more effective raising LED-backlit source.
Description of drawings
Accompanying drawing 1 is a structural principle block diagram of the present utility model;
Accompanying drawing 2 is the flow chart of the utility model master controller software section.
Embodiment
Come the utility model is described in further detail below in conjunction with accompanying drawing:
The present invention proposes a kind of liquid crystal with LED-backlit source automatic regulating apparatus,, can the brightness of backlight be adjusted, under the condition of necessity, can also carry out forced heat radiation according to the temperature of surround lighting and LED by this device.
This automatic regulating apparatus is at first monitored the state and the surrounding environment in LED-backlit source by LED temperature detecting unit and surround lighting detecting unit, and the data of collecting are sent to master controller.Master controller is searched look-up table according to the data of collected outside then, obtains corresponding deal with data.Again deal with data is sent to LED driver element and LED radiator fan at last, by LED driver element and LED radiator fan led array is handled again.
When environmental light brightness is high usually, increase the brightness in LED-backlit source; When environmental light brightness is hanged down, reduce the brightness in LED-backlit source.When the LED temperature is high, reduce the brightness in LED-backlit source; When the LED temperature is hanged down, increase the brightness in LED-backlit source.If the LED-backlit source temperature is higher, but because the user is provided with, still need higher brightness, then carry out forced heat radiation, this need be provided with according to the user and select to handle.
The hardware components of the utility model device can be selected as follows:
(1) LED temperature detecting unit: temperature sensor commonly used, such as/but be not limited to the ADT75 of AnalogDevice company or the MAX6694 of Maxim company;
(2) surround lighting detecting unit: be used for the luminance sensor of testing environment luminous intensity, such as/but be not limited to the TCS230 of TAOS company or the VM6101 of ST company;
(3) master controller: Programmable Logic Controller gets final product, microprocessor, FPGA or single-chip microcomputer all can, model is not limit, such as/but be not limited to the Cyclone Series FPGA of altera corp;
(4) look-up table: external ROM or be built in the master controller all can;
(5) LED driver element: the drive IC that is used for driving LED;
(6) LED radiator fan: common radiator fan gets final product;
(7) led array: the sequence of forming by the LED particle.
Claims (5)
1, a kind of liquid crystal LED-backlit source automatic regulating apparatus is characterized in that:
Comprise LED temperature detecting unit and surround lighting detecting unit, thereby both are electrically connected with master controller respectively monitoring and data of collecting are sent to master controller in the LED-backlit source these, master controller is electrically connected with look-up table, thereby the data according to collected outside are searched look-up table, obtain corresponding deal with data, master controller also is electrically connected with LED driver element and LED radiator fan respectively, thereby deal with data is sent to the LED driver element and the LED radiator fan is adjusted.
2, a kind of liquid crystal as claimed in claim 1 LED-backlit source automatic regulating apparatus is characterized in that:
Wherein the LED temperature detecting unit is a temperature sensor.
3, a kind of liquid crystal as claimed in claim 1 LED-backlit source automatic regulating apparatus is characterized in that:
Wherein the surround lighting detecting unit is a luminance sensor.
4, as any described a kind of liquid crystal LED-backlit source automatic regulating apparatus in the claim 1 to 3, it is characterized in that:
Wherein master controller is microprocessor, FPGA or single-chip microcomputer.
5, as any described a kind of liquid crystal LED-backlit source automatic regulating apparatus in the claim 1 to 3, it is characterized in that:
Wherein look-up table is built-in ROM of master controller or external ROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202283255U CN201336752Y (en) | 2008-12-09 | 2008-12-09 | LED backlight automatic adjusting device for liquid crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202283255U CN201336752Y (en) | 2008-12-09 | 2008-12-09 | LED backlight automatic adjusting device for liquid crystal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336752Y true CN201336752Y (en) | 2009-10-28 |
Family
ID=41288416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202283255U Expired - Fee Related CN201336752Y (en) | 2008-12-09 | 2008-12-09 | LED backlight automatic adjusting device for liquid crystal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336752Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102014565A (en) * | 2010-12-30 | 2011-04-13 | 长安大学 | Intelligent controller and control method of high-power white light LED (light emitting diode) |
| CN102374444A (en) * | 2010-08-11 | 2012-03-14 | 漳州灿坤实业有限公司 | Dimming desk lamp and automatic dimming method thereof |
| CN104183230A (en) * | 2014-07-29 | 2014-12-03 | 德亚智能科技无锡有限公司 | Brightness control method of display screen |
| CN106935207A (en) * | 2015-12-29 | 2017-07-07 | 小米科技有限责任公司 | Brightness control method and device |
| CN108538258A (en) * | 2017-03-06 | 2018-09-14 | 北京小米移动软件有限公司 | Adjust method and device, the display equipment of back facet current |
| CN110796988A (en) * | 2018-08-02 | 2020-02-14 | 北京小米移动软件有限公司 | Backlight adjusting method and device |
-
2008
- 2008-12-09 CN CNU2008202283255U patent/CN201336752Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374444A (en) * | 2010-08-11 | 2012-03-14 | 漳州灿坤实业有限公司 | Dimming desk lamp and automatic dimming method thereof |
| CN102374444B (en) * | 2010-08-11 | 2014-01-15 | 漳州灿坤实业有限公司 | Dimming desk lamp and automatic dimming method thereof |
| CN102014565A (en) * | 2010-12-30 | 2011-04-13 | 长安大学 | Intelligent controller and control method of high-power white light LED (light emitting diode) |
| CN102014565B (en) * | 2010-12-30 | 2013-07-10 | 长安大学 | Intelligent controller and control method of high-power white light LED (light emitting diode) |
| CN104183230A (en) * | 2014-07-29 | 2014-12-03 | 德亚智能科技无锡有限公司 | Brightness control method of display screen |
| CN106935207A (en) * | 2015-12-29 | 2017-07-07 | 小米科技有限责任公司 | Brightness control method and device |
| CN108538258A (en) * | 2017-03-06 | 2018-09-14 | 北京小米移动软件有限公司 | Adjust method and device, the display equipment of back facet current |
| CN108538258B (en) * | 2017-03-06 | 2023-03-24 | 北京小米移动软件有限公司 | Method and device for adjusting backlight current and display equipment |
| CN110796988A (en) * | 2018-08-02 | 2020-02-14 | 北京小米移动软件有限公司 | Backlight adjusting method and device |
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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: 20091028 Termination date: 20151209 |
|
| EXPY | Termination of patent right or utility model |