CN101101728B - Organic electroluminescence display brightness control system - Google Patents
Organic electroluminescence display brightness control system Download PDFInfo
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- CN101101728B CN101101728B CN2007100237394A CN200710023739A CN101101728B CN 101101728 B CN101101728 B CN 101101728B CN 2007100237394 A CN2007100237394 A CN 2007100237394A CN 200710023739 A CN200710023739 A CN 200710023739A CN 101101728 B CN101101728 B CN 101101728B
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- organic electroluminescence
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- electroluminescence display
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- 238000005401 electroluminescence Methods 0.000 title claims description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000000052 comparative effect Effects 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000013500 data storage Methods 0.000 claims description 8
- 210000000352 storage cell Anatomy 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
This system consists of the brightness collecting unit (BC), the data storing unit, the comparing unit (CP) and the controlling unit (CT). BC collects at least the environment light brightness (ELB) and the displayer irradiance brightness (DIB). The output of CP at least includes the comparing results of ELB and DIB. At least two outputs of CP are simultaneously sent to inputs of CT. This invention tests displayer irradiance intensity and the environment light intensity. Except BC, others may realize via software without adding peripheral hardware. It ensures the driving current of each pixel to consult simultaneously at least two data. This prevents the display effect from influencing due to decay of ELB and the irradiance material. It enables the displayer to possess a normal irradiance effect under different environment or after different using time. This invention suits certain especial areas where the performance of displayer brightness and contrast are important.
Description
Technical field
The present invention relates to a kind of display brightness control system, relate in particular to a kind of organic electroluminescence display brightness control system.
Background technology
In recent years the organic EL display panel of Chu Xianing with the restriction of its autoluminescence, no visual angle, adaptive temperature extensively, response, power saving fast, technology is simple and advantage such as full-colorization, makes it experience the develop rapidly of scientific research to industry during the decade short two.At present, organic electroluminescent device is the new lover in flat pannel display field, has obtained application in numerous products, as digital camera, mobile phone, digital code player, medicine equipment or the like, obtains popular favor with its fine and smooth abundant picture.
Yet, for the composite colour organic electroluminescent display screen, at present adopt " three primary colors luminescent layer methods ", the three primary colors luminescent layer technology of known technology are to utilize the active illuminating characteristic of organic light emitting display itself and produce different colors more, therefore do not need the extra filtering assembly of mixing colours that uses.Because the attenuation process of red, green, blue three primary colours organic material is inconsistent, wherein the decay of any color organic material is accelerated, and all can influence the display quality of display.Therefore, how keeping the consistance of three primary colours brightness in the display of organic electroluminescence, make it color stable, is one of important topic in the present full-colorization research.
In addition, the brightness that existing OLED display module shows after driving voltage is fixing also just is fixed up basically, such display device is suitable for changing little occasion at surround lighting, if the demonstration contrast of the very strong screen of surround lighting descends significantly, display effect is had a greatly reduced quality.The light of screen was relatively very strong when surround lighting was very weak, watched very dazzlingly, also was a kind of insignificant consumption on the power consumption of power supply.In addition, along with the increase of service time of OLED display, luminescence efficiency also can reduce gradually, and viewing effect is variation gradually.
And the display brightness that is applied to medicine equipment is generally 600-700cd/m2, and at 400-500cd/m2, and medical display needs 30,000 hours-100,000 hours brightness values to remain unchanged to the requirement of brightness through the brightness of calibration setup.
In addition, the Flame Image Process of drawing display specialty is generally seldom used LCD, because require to have as far as possible little image fault rate, possess goodish color rendition degree, possess high refresh rate and resolution, high-contrast and brightness, alap radiation simultaneously, wherein high-contrast and brightness need display self to remain constant contrast and brightness along with the change of the surround lighting of the growth of service time and environment for use.
Summary of the invention
The object of the present invention is to provide a kind of testing environment luminance brightness in real time and device decay brightness, and the brightness control system of real-time regulated device illumination effect.
The objective of the invention is to be achieved by the following technical programs: the present invention's brightness control system comprises the brightness collecting unit, data storage cell, comparing unit and control module, it is characterized in that, described brightness collecting unit is gathered environmental light brightness and display device self-illuminating brightness at least, the output signal of described comparing unit comprises environmental light brightness comparative result and display device self-illuminating brightness comparative result at least, and at least two output signals of described comparing unit are the input signal of described control module jointly.
Described brightness collecting unit can be optical sensor.
Described brightness collecting unit can comprise at least two optical sensors.
Described data storage cell comprises original value register and base value register at least.
Institute's deposit data is the undamped self-illuminating brightness of display device in the described original value register.
Institute's deposit data is the offset of existing display device self-illuminating brightness and the undamped self-illuminating brightness difference of display device in the described base value register.
Described control module can be software control or hardware controls.
Described software control unit comprises the storage of display device self-illuminating brightness comparative result at least, the output of environmental light brightness comparative result, and output current is regulated.
Described hardware control unit comprises controlled variable regulating device and output current regulating device at least.
Described controlled variable regulating device can be digital regulation resistance.
The present invention detects display device autoluminescence light intensity and surround lighting light intensity simultaneously, removes the brightness collecting unit, and all the other all can be realized by software, need not to increase peripheral hardware equipment; Simultaneously, make the drive current of each pixel simultaneously with reference at least two data, effectively contained the influence of surround lighting and device luminescent material decay to display effect, make display device under varying environment or under different service time, all can access normal illumination effect, especially can be applicable to the special dimension that some has higher requirements to display brightness and contrast.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is one embodiment of the invention structured flowchart;
Fig. 3 is another embodiment of the present invention structured flowchart;
After Fig. 4 lights decay for the embodiment of the invention 1 and Comparative Examples two display devices pass through identical time the same terms, the CIE1931 chromaticity coordinates figure of the two.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
With reference to Fig. 1.The present invention's brightness control system comprises brightness collecting unit 11, data storage cell 12, comparing unit 13 and control module 14, brightness collecting unit 11 is gathered environmental light brightness and display device self-illuminating brightness at least, the output signal of comparing unit 13 comprises environmental light brightness comparative result and display device self-illuminating brightness comparative result at least, and at least two output signals of comparing unit 13 are the input signal of control module 14 jointly.Wherein, brightness collecting unit 11 comprises the optical sensor 1 (not showing among Fig. 1) of gathering environmental light brightness and the optical sensor 2 (not showing among Fig. 1) of gathering the display device self-illuminating brightness, data storage cell 12 comprises original value register (not showing among Fig. 1) and base value register (not showing among Fig. 1), institute's deposit data is the undamped self-illuminating brightness of display device in the original value register, and institute's deposit data is the offset of existing display device self-illuminating brightness and the undamped self-illuminating brightness difference of display device in the base value register.
Embodiment 1
With reference to Fig. 2.The brightness control system of present embodiment comprises the brightness collecting unit, data storage cell, comparing unit and control module, the brightness collecting unit is gathered environmental light brightness and display device self-illuminating brightness at least, the output signal of comparing unit comprises environmental light brightness comparative result and display device self-illuminating brightness comparative result at least, and at least two output signals of comparing unit are the input signal of control module jointly.Wherein, the brightness collecting unit comprises optical sensor 21-1 that gathers environmental light brightness and the optical sensor 21-2 that gathers the display device self-illuminating brightness, the output of two optical sensors is converted to voltage signal by A/D converter 22, data storage cell comprises original value register 23 and base value register 24, institute's deposit data is the undamped self-illuminating brightness of display device in the original value register 23, and institute's deposit data is the offset of existing display device self-illuminating brightness and the undamped self-illuminating brightness difference of display device in the base value register 24.
Gather display 25 self-illuminating brightness by optical sensor 21-2 during display 25 starts, be converted to voltage signal by A/D converter 22, be input to jointly among the diadic comparer 26-1 with the undamped self-illuminating brightness of display device in the original value register 23, to export the result, the offset that is both differences deposits in the base value register 24, with treat optical sensor 21-1 will this moment the environmental light brightness value of display 25 environment of living in gather and after the A/D conversion, with it relatively through diadic comparer 26-2, but the result relatively is converted to program by controlled variable unit 27 and regulates current unit 28 recognition data, by its concrete numerical value that provides, export to display 25 by software control power supply unit 29.
Embodiment 2
The difference of present embodiment and embodiment 1 is, after the result's conversion after the controlled variable unit will compare, by hardware controls display device size of current, comprises digital regulation resistance 31 and current regulator 32, and required electric current is exported to display 25 by power supply unit 29.
Comparative Examples
With reference to Fig. 4.This Comparative Examples is existing common color organic electroluminescence device, brightness control system is not set, the display device that brightness control system is set of this Comparative Examples display device and embodiment 1 is compared, among Fig. 4, A, B are the organic elctroluminescent device of same structure, A is embodiment 1 a described display device, B is the described display device of this Comparative Examples, during original state, as Fig. 4 a, the CIE1931 chromaticity coordinates of the two is approaching under the same test condition, is respectively A (0.3130,0.3291), B (0.3191,0.3305); Through 3000 hours, as Fig. 4 b, still after the same terms was lighted decay, the CIE1931 chromaticity coordinates of the two was respectively A (0.3101,0.3253), B (0.2743,0.3403).The red brightness decay of B screen is very fast, causes chromaticity coordinates generation skew to a certain degree, but the A screen is owing to there is the light detection device to carry out current compensation, and its chromaticity coordinates shows fundamental sum original state unanimity.
Though more than described most preferred embodiment of the present invention, technical scope of the present invention is not limited to the scope of above-mentioned discussion.The above-mentioned embodiment that provides just only is used for further explaining the present invention on the basis of summary of the invention.It should be understood that those skilled in the art can make multiple improvement to said process, but this all class improvement belongs to all in the scope of the present invention also.
Claims (8)
1. organic electroluminescence display brightness control system, comprise peripheral brightness collecting unit, data storage cell, comparing unit and control module, it is characterized in that, described peripheral brightness collecting unit is gathered environmental light brightness and display device self-illuminating brightness at least, the output signal of described comparing unit comprises environmental light brightness comparative result and display device self-illuminating brightness comparative result at least, at least two output signals of described comparing unit are the input signal of described control module jointly, described data storage cell comprises original value register and base value register at least, institute's deposit data is the offset of existing display device self-illuminating brightness and the undamped self-illuminating brightness difference of display device in the described base value register, and offset carries out current compensation with the reduced color coordinate to color coordinate drift.
2. organic electroluminescence display brightness control system according to claim 1 is characterized in that, described peripheral brightness collecting unit is an optical sensor.
3. organic electroluminescence display brightness control system according to claim 2 is characterized in that, described peripheral brightness collecting unit comprises at least two optical sensors.
4. organic electroluminescence display brightness control system according to claim 1 is characterized in that, institute's deposit data is the undamped self-illuminating brightness of display device in the described original value register.
5. organic electroluminescence display brightness control system according to claim 1 is characterized in that, described control module is software control or hardware controls.
6. organic electroluminescence display brightness control system according to claim 5 is characterized in that, described software control unit comprises the storage of display device self-illuminating brightness comparative result at least, the output of environmental light brightness comparative result, and output current is regulated.
7. organic electroluminescence display brightness control system according to claim 5 is characterized in that, described hardware control unit comprises controlled variable regulating device and output current regulating device at least.
8. organic electroluminescence display brightness control system according to claim 7 is characterized in that, described controlled variable regulating device is a digital regulation resistance.
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| CN2007100237394A CN101101728B (en) | 2007-07-06 | 2007-07-06 | Organic electroluminescence display brightness control system |
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| CN2007100237394A CN101101728B (en) | 2007-07-06 | 2007-07-06 | Organic electroluminescence display brightness control system |
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| CN101101728B true CN101101728B (en) | 2011-07-13 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377450B (en) * | 2008-09-19 | 2012-10-03 | 李鑫 | System and method for extracting lightness data of display screen dot matrix |
| CN102176728B (en) * | 2009-10-24 | 2013-12-11 | 汉达精密电子(昆山)有限公司 | Electronic device for changing color according to background light source and color correcting method of electrochromic layer |
| CN103606366A (en) * | 2013-11-08 | 2014-02-26 | 桂林机床电器有限公司 | Outdoor display screen brightness self adjusting method |
| CN104754791B (en) * | 2013-12-27 | 2017-03-01 | 微动公司 | The control method of the operating current of electroluminescence device, device and system |
| CN105976790A (en) * | 2016-06-20 | 2016-09-28 | 广州视睿电子科技有限公司 | Display screen brightness adjusting device and electronic equipment thereof |
| CN108053787B (en) * | 2017-12-20 | 2020-11-24 | 中国航空工业集团公司洛阳电光设备研究所 | Self-adaptive brightness control method for head-up display |
| CN110164362B (en) | 2018-06-26 | 2021-08-17 | 京东方科技集团股份有限公司 | Compensation device and method of light-emitting device, display substrate and manufacturing method of display substrate |
| CN110349554A (en) * | 2019-07-12 | 2019-10-18 | 开封大学 | A kind of computer display automatic brightness adjustment device |
| KR20210024274A (en) * | 2019-08-21 | 2021-03-05 | 삼성디스플레이 주식회사 | Organic light emitting diode display device and driving method thereof |
| CN115273761B (en) * | 2022-08-17 | 2023-11-24 | 海博瑞电子(江苏)有限公司 | LED brightness compensation control method and system of double dot matrix |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1347074A (en) * | 2000-09-29 | 2002-05-01 | 伊斯曼柯达公司 | Lightness feedback panel display |
| CN1364285A (en) * | 2000-03-14 | 2002-08-14 | 皇家菲利浦电子有限公司 | Electroluminescent display device with luminance correction in dependence on age and ambient light |
| CN1786778A (en) * | 2004-12-06 | 2006-06-14 | 奇菱科技股份有限公司 | Apparatus and method for controlling brightness of intelligent type displaying panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1364285A (en) * | 2000-03-14 | 2002-08-14 | 皇家菲利浦电子有限公司 | Electroluminescent display device with luminance correction in dependence on age and ambient light |
| CN1347074A (en) * | 2000-09-29 | 2002-05-01 | 伊斯曼柯达公司 | Lightness feedback panel display |
| CN1786778A (en) * | 2004-12-06 | 2006-06-14 | 奇菱科技股份有限公司 | Apparatus and method for controlling brightness of intelligent type displaying panel |
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