CN102447858A - LED (Light Emitting Diode) backlight control method based on infrared eye-tracking technology - Google Patents
LED (Light Emitting Diode) backlight control method based on infrared eye-tracking technology Download PDFInfo
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- CN102447858A CN102447858A CN201110448666XA CN201110448666A CN102447858A CN 102447858 A CN102447858 A CN 102447858A CN 201110448666X A CN201110448666X A CN 201110448666XA CN 201110448666 A CN201110448666 A CN 201110448666A CN 102447858 A CN102447858 A CN 102447858A
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Abstract
The invention relates to an LED (Light Emitting Diode) backlight control method based on an infrared eye-tracking technology. The LED backlight control method is characterized by comprising the following steps of: (1) starting a connected infrared eye-tracking device while opening; (2) emitting infrared lights to a user and searching and capturing flashing of eyes and reflection of retinas of the user through the infrared eye-tracking device; (3) analyzing the data captured by the infrared eye-tracking device through a controller of a television control unit; (4) judging whether the lines of sight of the user are within a screen range or not according to the obtained information through the controller; and (5) emitting an LED brightness signal as a default through the controller if the lines of sight of the user are within the screen range; otherwise, emitting the LED brightness signal which is 20-35% lower than the default through the controller. Obviously, by utilizing the LED backlight control method disclosed by the invention, the brightness of an LED backlight source is reduced in a space of a television picture not watched by the user, thus the power consumption of the whole television can be reduced.
Description
Technical field
The present invention relates to a kind of LED-backlit control method based on infrared eye tracking technology.
Background technology
Just flourish, product on sale is numerous on the market at present for flat panel display, and the LED-backlit source is the main flow backlight technology of present LCD TV, and led light source the most significantly characteristics is expansions of colour gamut, and the reduction of power consumption.Use LED-backlit to have broader colour gamut, realize more gorgeous color.The LCD TV of the CCFL backlight of comparing traditional has reduced power consumption a lot; Thereby but along with various countries to energy-saving and emission-reduction require increasingly high LED-backlit source also will constantly reduce oneself power consumption to satisfy following power consumption standard through technology innovation, for the user saves energy spending.
The operation principle of eye tracker is to send sightless infrared light to the user, utilizes two built-in infrared remote receiver searches to catch the flicker and the amphiblestroid reflection of user's eyeball then.Correlation technique is very ripe now through years of development, and volume can be controlled at very small dimensions, and cost is very cheap, extensive equipment such as medical treatment, detection.
Summary of the invention
The purpose of this invention is to provide a kind of LED-backlit control method based on infrared eye tracking technology; Can be preset in user's visual line of sight data in the program and judge user's sight line whether in the screen scope according to detecting the contrast of user's sight line, thereby dynamically adjust the brightness of LED-backlit source.
A kind of LED-backlit control method based on infrared eye tracking technology, its special feature is, comprises the steps:
(1) infrared eye tracking equipment is placed LED-backlit LCD TV bottom center position, start starts the infrared eye tracking equipment that is connected simultaneously;
(2) infrared eye tracking equipment sends infrared light to the user, utilizes 2 built-in infrared remote receiver searches to catch the flicker of user's eyeball and the reflection of eye nethike embrane;
(3) control device of tv control unit carries out Treatment Analysis to the data that infrared eye tracking equipment captures;
(4) control device is preset in user's visual line of sight data in the program according to the relative angle that obtains, range information contrast and judges user's sight line whether in the screen scope;
(5) as comparing result be user's sight line in the screen scope, then control device sends the LED luminance signal with default value; As comparing result be user's sight line not in the screen scope, then the control device LED luminance signal that will be lower than default value 20-35% is sent to the LED chip for driving, thereby reduces LED-backlit source brightness; Do not detect user's sight line data as continuous 20-50 minute, then control device directly sends the signal of closing LED-backlit;
The data of (6) catching according to infrared eye tracking equipment when control device detect user's sight line once more and the LED luminance signal are returned to default value output in the screen scope time.
Wherein control device is FPGA.
The inventive method is to utilize infrared eye tracking equipment judges whether watching television image, utilizes the user not watch the free time of picture to reduce back light source brightness, thereby realizes reducing power consumption.Clearly, adopt method for controlling backlight thereof of the present invention after, do not watch the space of television image to reduce LED-backlit source brightness the user, just can make Overall Power Consumption decline.
Description of drawings
Fig. 1 is the LED-backlit control method block diagram based on infrared eye tracking technology.
Embodiment
Embodiment 1:
As shown in Figure 1, the inventive method is following:
(1) infrared eye tracking equipment is placed LED-backlit LCD TV bottom center position, start starts the equipment that is connected simultaneously;
(2) infrared eye tracking equipment sends infrared light to the user, utilizes 2 built-in infrared remote receiver searches to catch the flicker of user's eyeball and the reflection of eye nethike embrane;
(3) control device of tv control unit (is example with FPGA) carries out Treatment Analysis to the data that infrared eye tracking equipment captures;
(4) FPGA is preset in user's visual line of sight data in the program according to the relative angle that obtains, range information contrast and judges user's sight line whether in the screen scope;
(5) as comparing result be user's sight line in the screen scope, then FPGA sends the LED luminance signal with default value.As comparing result be user's sight line not in the screen scope, then the FPGA LED luminance signal that will be lower than default value 20-35% is sent to the LED chip for driving, thereby reduces LED-backlit source brightness.Do not detect user's sight line data as continuous 20-50 minute, then FPGA directly sends the signal of closing LED-backlit;
The data of (6) catching according to infrared eye tracking equipment as FPGA detect user's sight line once more and the LED luminance signal are returned to default value output in the screen scope time.
The operation principle of existing eye tracker is: send sightless infrared light to the user, utilize two built-in camera searches to catch " flicker " of user's eyeball and the reflection of eye nethike embrane then.Need calibration for different users.Whether wear glasses as for the user does not have any influence.Eye tracker is not the substitute of conventional mouse keyboard or newer touch-screen, and it is an auxilliary rib device, can let computer use more quickly and effectively.
Claims (8)
1. a silicon solar cell is used electrocondution slurry, it is characterized in that, consists of by the quality percentage composition: glass dust 0.6-2.5%; No. 2 20-30% of aluminium powder, organic carrier 12-20%, solvent 3-8%; Dispersant 0.4-2.5%, inorganic additive 0.6-1.5%, surplus is No. 1, aluminium powder.
2. a kind of silicon solar cell as claimed in claim 1 is used electrocondution slurry, it is characterized in that: wherein glass dust is low-melting point lead-less glasses powder, consists of by the quality percentage composition: BaCO
35-10%, SiO
211-25%, BaO 20-40%, Al
2O
31-8%, Bi
2O
32-5%, ZnO 1-5%, KCO
30-2%, surplus is B
2O
3
3. a kind of silicon solar cell as claimed in claim 2 is used electrocondution slurry, it is characterized in that: the median particle diameter D of glass dust wherein
50Be 0.5-4 μ m, fusing point is 590-650 ℃.
4. use electrocondution slurry like any described a kind of silicon solar cell in the claim 1 to 3, it is characterized in that: wherein aluminium powder is ball aluminum powder, particle diameter D No. 1
50Be the 4-6 micron, purity＞98%; Aluminium powder is for No. 2 a ball aluminum powder, particle diameter D
50Be the 1-3 micron, purity＞98%.
5. use electrocondution slurry like any described a kind of silicon solar cell in the claim 1 to 3, it is characterized in that: wherein to consist of ethyl cellulose STD-4 by the quality percentage composition be 10-20% to organic carrier, and BC is 80-90%;
Dispersant is that the mixture of Tego 610s and BYK-111 and the amount of Tego 610s are no more than BYK 111;
Inorganic additive is magnesium carbonate, silicon dioxide and boron oxide, wherein magnesium carbonate by weight: silicon dioxide: boron oxide=0.2-1: 0.3-1: 1;
Solvent is for being BC.
6. a silicon solar cell is characterized in that with the preparation method of electrocondution slurry, comprises the steps: the proportioning according to claim 1, earlier with two kinds of aluminium powder weighings in proportion, adds to roll in bottle machine and mixes 2 hours; It is for use to get organic carrier again; Weighing glass dust and inorganic additive then add the organic carrier of dispersant and 10-30%, on mixer, mix; All the other organic carriers and two kinds of aluminium powders mix; Add the solvent BC again and mix, use three-roller elder generation rolling to contain the glass dust part, add then contain aluminium powder part rolling to evenly and fineness smaller or equal to 15 μ m.
7. a kind of silicon solar cell as claimed in claim 6 is characterized in that with the preparation method of electrocondution slurry: wherein glass dust adopts the preparation of following method, earlier the raw material of the glass dust proportioning according to claim 2 is mixed; Pack in the porcelain crucible, put into silicon carbide rod furnace again and heat up and be incubated half an hour after being preheating to 550～650 ℃, rise to 1000～1100 ℃ of melting half an hour again; Water is floating to be filtered; With the bead that the obtains ball grinder of packing into, ball milling is 48h at least, and filtering drying obtains median particle diameter D
50Glass dust for 0.5-4 μ m.
8. a kind of silicon solar cell as claimed in claim 6 is with the preparation method of electrocondution slurry; It is characterized in that: wherein organic carrier is that solvent BC and resin ethyl cellulose STD-4 are added in the ratio of claim 5; In container, use 75 ℃ of water-baths heating, and to use electronic stirring, rotating speed be 500 rev/mins; Heated and stirred 3 hours is dissolved until resin fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110448666XA CN102447858A (en) | 2011-12-28 | 2011-12-28 | LED (Light Emitting Diode) backlight control method based on infrared eye-tracking technology |
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|---|---|---|---|
| CN201110448666XA CN102447858A (en) | 2011-12-28 | 2011-12-28 | LED (Light Emitting Diode) backlight control method based on infrared eye-tracking technology |
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| CN102447858A true CN102447858A (en) | 2012-05-09 |
Family
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| CN201110448666XA Pending CN102447858A (en) | 2011-12-28 | 2011-12-28 | LED (Light Emitting Diode) backlight control method based on infrared eye-tracking technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107223276A (en) * | 2017-04-26 | 2017-09-29 | 深圳市汇顶科技股份有限公司 | Eyeball remote control system and electronic installation |
| CN107515466A (en) * | 2017-08-14 | 2017-12-26 | 华为技术有限公司 | A kind of eyeball tracking system and eyeball tracking method |
| CN110517645A (en) * | 2019-08-30 | 2019-11-29 | 京东方科技集团股份有限公司 | Display device, electronic equipment and backlight dynamic area brightness adjusting method |
| CN111243532A (en) * | 2020-01-16 | 2020-06-05 | 聚好看科技股份有限公司 | Backlight control method and display device |
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| CN101730500A (en) * | 2007-03-08 | 2010-06-09 | 北英属哥伦比亚大学 | The equipment and the method that are used for objective perimetry visual field test |
| WO2010136762A1 (en) * | 2009-05-28 | 2010-12-02 | Milan Momcilo Popovich | Apparatus for providing a 3d display |
| CN102028577A (en) * | 2010-10-27 | 2011-04-27 | 冠捷显示科技（厦门）有限公司 | Intelligent eye vision protection system |
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| CN101336089A (en) * | 2006-01-26 | 2008-12-31 | 诺基亚公司 | Eye tracker equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107223276A (en) * | 2017-04-26 | 2017-09-29 | 深圳市汇顶科技股份有限公司 | Eyeball remote control system and electronic installation |
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| CN107515466B (en) * | 2017-08-14 | 2019-11-26 | 华为技术有限公司 | A kind of eyeball tracking system and eyeball tracking method |
| US11067795B2 (en) | 2017-08-14 | 2021-07-20 | Huawei Technologies Co., Ltd. | Eyeball tracking system and eyeball tracking method |
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| CN110517645A (en) * | 2019-08-30 | 2019-11-29 | 京东方科技集团股份有限公司 | Display device, electronic equipment and backlight dynamic area brightness adjusting method |
| CN111243532A (en) * | 2020-01-16 | 2020-06-05 | 聚好看科技股份有限公司 | Backlight control method and display device |
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Application publication date: 20120509 |