CN101950538A - Direct LED backlight device and driving method thereof - Google Patents
Direct LED backlight device and driving method thereof Download PDFInfo
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- CN101950538A CN101950538A CN 201010297268 CN201010297268A CN101950538A CN 101950538 A CN101950538 A CN 101950538A CN 201010297268 CN201010297268 CN 201010297268 CN 201010297268 A CN201010297268 A CN 201010297268A CN 101950538 A CN101950538 A CN 101950538A
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- led
- backlit source
- control panel
- led backlight
- source control
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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a direct LED backlight device and a driving method thereof. The direct LED backlight device is characterized by comprising an LED backlight control board, wherein the LED backlight control board is respectively connected with a light sensor unit and a video input signal unit to acquire the intensity of ambient light and luminance information of a video signal, and is also connected with an LED backlight lamp panel through an LED backlight driving board to adjust the luminance of the LED backlight lamp panel in real time as required. Under the control of the driving method thereof, the LED backlight device can adjust the luminance according to the content of the video signal and the intensity of the ambient light so as to further save energy consumption and fully meet the requirement of different display states.
Description
Technical field
The present invention relates to a kind of direct LED backlight device and driving method thereof.
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, there was tangible competitive edge in the LED-backlit source aspect power consumption, how better to promote the competitive edge of LED-backlit source TV simultaneously, and this patent proposes a kind of direct LED backlight device and driving method thereof.
Summary of the invention
One of purpose of the present invention provides a kind of direct LED backlight device, and it can carry out brightness regulation according to the power of video signal content and surround lighting;
Another object of the present invention provides a kind of driving method of above-mentioned direct LED backlight device.
For achieving the above object, the technical solution used in the present invention is:
A kind of direct LED backlight device, its special feature is, comprise LED-backlit source control panel, thereby this LED-backlit source control panel is connected power and the video luminance signal information of obtaining surround lighting with the optical sensor unit respectively with the video input signals unit, thereby this LED-backlit source control panel also is connected the brightness of adjusting LED-backlit source lamp plate as required in real time by LED-backlit source drive plate with LED-backlit source lamp plate.
A kind of driving method of direct LED backlight device, its special feature is, comprises the steps:
A, optical sensor unit send signal according to the power of surround lighting and give LED-backlit source control panel;
B, LED-backlit source control panel receive the signal that the optical sensor unit sends over, and generate a scale-up factor K, and the scope of K is smaller or equal to 1 but more than or equal to 1/2, and default value is 1;
C, LED-backlit source control panel carry out the subregion brightness statistics after receiving the vision signal that the video input signals unit sends, and store the brightness value of each subregion;
The final brightness value of d, each subregion is that the brightness value of each subregion multiply by scale-up factor K;
E, LED-backlit source control panel write final brightness value in the corresponding registers of LED-backlit source drive plate;
F, LED-backlit source drive plate come driving LED backlight lamp plate to carry out luminous according to the setting value of register.
Wherein LED-backlit source control panel adopts FPGA.
Because LED-backlit source apparatus of the present invention can carry out the adjusting of brightness according to the power of video signal content and surround lighting under the control of its driving method, thereby energy efficient further can also fully adapt to the needs of different show states.
Description of drawings
The logic theory block diagram of accompanying drawing 1 for installing among the present invention.
Embodiment
As shown in Figure 1, apparatus of the present invention comprise LED-backlit source control panel, thereby this LED-backlit source control panel is connected power and the video luminance signal information of obtaining surround lighting with the optical sensor unit respectively with the video input signals unit, thereby this LED-backlit source control panel also is connected the brightness of adjusting LED-backlit source lamp plate as required in real time by LED-backlit source drive plate with LED-backlit source lamp plate.
The driving method of apparatus of the present invention comprises the steps:
A, optical sensor unit send signal according to the power of surround lighting and give LED-backlit source control panel, and LED-backlit source control panel is realized by adopting FPGA;
B, LED-backlit source control panel receive the signal that the optical sensor unit sends over, and generate a scale-up factor K, and the scope of K is smaller or equal to 1 but more than or equal to 1/2 (lower limit set is 1/2), default value is 1; (occurrence of K is to determine that according to environmental light brightness scope ratio the lower limit set of environmental light brightness scope is minimum K value 1/2, and the upper limit of environmental light brightness is set at maximum K value 1.The for example general general 200Lux of environmental light brightness on daytime, getting K is 1, and evening, the brightness of daylight lamp was 40-50Lux probably, and getting K is 1/2, and the K value is to set according to the brightness value ratio in this scope.)
C, LED-backlit source control panel receive and carry out the subregion brightness statistics after the vision signal that the video input signals unit sends (be example with 160 (16X10) subregions among the present invention, the concrete number of partitions is determined according to designing requirement.For example the liquid crystal display horizontal direction of 1920X1080 is divided into 16 districts, and vertical direction is divided into 10 zones, and screen is divided into 160 zones altogether.The brightness value of each subregion is got the brightness maximal value in this subregion), and store the brightness value of each subregion;
The final brightness value of d, each subregion is that the brightness value of each subregion multiply by scale-up factor K;
E, LED-backlit source control panel write final brightness value in the corresponding registers of LED-backlit source drive plate;
F, LED-backlit source drive plate come driving LED backlight lamp plate to carry out luminous according to the setting value of register.
Claims (3)
1. direct LED backlight device, it is characterized in that: comprise LED-backlit source control panel, thereby this LED-backlit source control panel is connected power and the video luminance signal information of obtaining surround lighting with the optical sensor unit respectively with the video input signals unit, thereby this LED-backlit source control panel also is connected the brightness of adjusting LED-backlit source lamp plate as required in real time by LED-backlit source drive plate with LED-backlit source lamp plate.
2. the driving method of a direct LED backlight device is characterized in that, comprises the steps:
A, optical sensor unit send signal according to the power of surround lighting and give LED-backlit source control panel;
B, LED-backlit source control panel receive the signal that the optical sensor unit sends over, and generate a scale-up factor K, and the scope of K is smaller or equal to 1 but more than or equal to 1/2, and default value is 1;
C, LED-backlit source control panel carry out the subregion brightness statistics after receiving the vision signal that the video input signals unit sends, and store the brightness value of each subregion;
The final brightness value of d, each subregion is that the brightness value of each subregion multiply by scale-up factor K;
E, LED-backlit source control panel write final brightness value in the corresponding registers of LED-backlit source drive plate;
F, LED-backlit source drive plate come driving LED backlight lamp plate to carry out luminous according to the setting value of register.
3. the driving method of a kind of direct LED backlight device as claimed in claim 2 is characterized in that:
Wherein LED-backlit source control panel adopts FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010297268 CN101950538A (en) | 2010-09-30 | 2010-09-30 | Direct LED backlight device and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010297268 CN101950538A (en) | 2010-09-30 | 2010-09-30 | Direct LED backlight device and driving method thereof |
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| Publication Number | Publication Date |
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| CN101950538A true CN101950538A (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010297268 Pending CN101950538A (en) | 2010-09-30 | 2010-09-30 | Direct LED backlight device and driving method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104318911A (en) * | 2013-11-27 | 2015-01-28 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display luminance control circuit and method |
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| CN101369418A (en) * | 2008-10-13 | 2009-02-18 | 南京Lg新港显示有限公司 | Apparatus and its regulation means for automatically adjusting display brightness according to ambient brightness |
| CN101546532A (en) * | 2008-03-26 | 2009-09-30 | 群康科技(深圳)有限公司 | Automatic regulating device and automatic regulating method for liquid crystal display luminance |
| CN101614900A (en) * | 2009-07-22 | 2009-12-30 | 昆山龙腾光电有限公司 | Display panels and liquid crystal indicator |
| CN101622571A (en) * | 2007-02-23 | 2010-01-06 | 索尼株式会社 | Light source device and liquid crystal display device |
| US20100060562A1 (en) * | 2007-04-20 | 2010-03-11 | Benjamin James Hadwen | Stray light compensation in ambient light sensor |
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2010
- 2010-09-30 CN CN 201010297268 patent/CN101950538A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101622571A (en) * | 2007-02-23 | 2010-01-06 | 索尼株式会社 | Light source device and liquid crystal display device |
| US20100060562A1 (en) * | 2007-04-20 | 2010-03-11 | Benjamin James Hadwen | Stray light compensation in ambient light sensor |
| CN101546532A (en) * | 2008-03-26 | 2009-09-30 | 群康科技(深圳)有限公司 | Automatic regulating device and automatic regulating method for liquid crystal display luminance |
| CN101369418A (en) * | 2008-10-13 | 2009-02-18 | 南京Lg新港显示有限公司 | Apparatus and its regulation means for automatically adjusting display brightness according to ambient brightness |
| CN101614900A (en) * | 2009-07-22 | 2009-12-30 | 昆山龙腾光电有限公司 | Display panels and liquid crystal indicator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104318911A (en) * | 2013-11-27 | 2015-01-28 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display luminance control circuit and method |
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Application publication date: 20110119 |