用于侧出式发光二极管背光的全局动态调光算法

冯奇斌; 何会杰; 张伟伟; 方勇; 吕国强

doi:10.3788/OPE.20122007.1455

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用于侧出式发光二极管背光的全局动态调光算法

现代应用光学 | 更新时间：2020-08-12

- 用于侧出式发光二极管背光的全局动态调光算法
- Global dimming algorithm for side-lit LED backlights
- 光学精密工程 2012年20卷第7期页码：1455-1462
- 作者机构：
  
  1. 合肥工业大学特种显示技术教育部重点实验室特种显示技术国家工程实验室现代显示技术省部共建国家重点实验室光电技术研究院,安徽合肥,230009
  2. 合肥工业大学仪器科学与光电工程学院,安徽合肥,230009
- 作者简介：
- 基金信息：
  
  国家973重点基础研究发展计划资助项目(No.2010CB334704,No.2012CB723406)();国家青年科学基金资助项目(No.61107014)();广
- DOI：10.3788/OPE.20122007.1455
  中图分类号： TN312.8;TN141.9
- 收稿日期：2012-01-18，
  
  修回日期：2012-02-10，
  
  网络出版日期：2012-07-10，
  
  纸质出版日期：2012-07-10
- 稿件说明：
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冯奇斌, 何会杰, 张伟伟, 方勇, 吕国强. 用于侧出式发光二极管背光的全局动态调光算法[J]. 光学精密工程, 2012,20(7): 1455-1462

FENG Qi-bin, HE Hui-jie, ZHANG Wei-wei, FANG Yong, LV Guo-qiang. Global dimming algorithm for side-lit LED backlights[J]. Editorial Office of Optics and Precision Engineering, 2012,20(7): 1455-1462
冯奇斌, 何会杰, 张伟伟, 方勇, 吕国强. 用于侧出式发光二极管背光的全局动态调光算法[J]. 光学精密工程, 2012,20(7): 1455-1462 DOI： 10.3788/OPE.20122007.1455.

FENG Qi-bin, HE Hui-jie, ZHANG Wei-wei, FANG Yong, LV Guo-qiang. Global dimming algorithm for side-lit LED backlights[J]. Editorial Office of Optics and Precision Engineering, 2012,20(7): 1455-1462 DOI： 10.3788/OPE.20122007.1455.

摘要

结合背光源发展趋势

提出了适用于侧出式LED背光的全局动态调光算法。首先

根据显示图片平均灰度值、最大灰度值和平均值的差值确定背光调光亮度。接着

基于S曲线对液晶像素亮度值进行补偿。亮度大于S曲线拐点的像素的调整因子大于1

小于拐点的像素的调整因子小于1

以此有效提高静态对比度

并且不会引入溢出失真。对算法进行了仿真分析并开发了原理样机进行实际验证。结果表明:采用动态调光算法的液晶显示器的功耗严重依赖于显示内容;显示40幅不同类型的图片时

平均整机节能为9.39%;静态对比度提高了124.7%。采用本文提出的全局动态调光算法的侧出式背光具有成本低、体积轻薄、节能、对比度高的优点。

Abstract

In consideration of the development trends of backlights

a global dimming algorithm for side-lit backlights was proposed to solve the problems of Liquid Crystal Devices(LCDs) in low contrast ratio and high power consumption. The backlight dimming level was decided by the average luminance and the difference between the average and max grayscales of all subpixels. Then

the S-shaped function was involved to improve the static contrast ratio

by which the pixels with the grayscales more than the turning point of the curve could be become brighter and those less than the turning point could become darker

so that the static contrast ratio was improved efficiently. The algorithm was simulated and a prototype was developed to evaluate the effects of the dimming algorithm. Experimental results indicate that the power consumption of the LCD with the global dimming heavily depends on what to be displayed on the images. For 40 different kinds of images

the average power has reduced by 9.39% and the static contrast ratio improved by 124.7%. The side-lit backlights performing the proposed global dimming algorithm have the advantages of low-cost

small thickness

low power consumption and high constrast ratio.

关键词

Keywords

references

DEN ENGELSEN D,童林夙. 背光源的发展趋势 [J].光电子技术,2006,26(2):74-80. DEN ENGELSEN D, TONG L S. Trends of backlights[J]. Journal of Opto-Electronic Technology, 2006, 26(2):74-80.(in Chinese)

常锋,孙志远,王瑞光,等. LED显示图像的非均匀度校正改进方法 [J]. 光学精密工程,2011,19(4):929-937. CHANG F, SUN ZH Y, WANG R G, et al.. Improvement of nonuniformity correction of LED display iamges[J]. Optics and Precision Engineering, 2011,19(4):929-937. (in Chinese)

WU S T. Next generation LCD technology [J]. Journal of Information Display, 2010, 26(1): 3.

李福文,金伟其,邵喜斌,等. 基于LED背光源区域控制的高动态范围液晶显示技术进展 [J]. 光学技术,2009,35(6): 835-839. LI F W, JIN W Q, SHAO X B, et al.. Progress of high dynamic range liquid crystal display based on LED backlight with area control technology [J]. Journal of Optical Technique, 2009, 35(6):835-839. (in Chinese)

金鹏,喻春雨,周奇峰,等. LED在道路照明中的光效优势 [J]. 光学精密工程,2011, 19(1):51-55. JIN P, YU CH Y, ZHOU Q F, et al.. Superior application of LED to street lighting [J]. Optics and Precision Engineering, 2011, 19(1):51-55. (in Chinese)

CHO H, KWON O K. A backlight dimming algorithm for low power and high image quality LCD applications[J]. IEEE Transactions on Consumer Electronics, 2009, 55(2): 839-844.

HUANG M H,TSAI Y C, CHEN K H. Energy-Recycling (ER) technique for a direct-lit intelligent power management Backlight Unit (BLU) [J]. IEEE Transactions on Power Electronics, 2010, 25(10): 2588-2598.

CHIU T L, LEE J H. Color gamut variation of LED-lit LCD at different module temperatures [J]. Optics Communications,2010, 283:373-378.

HUANG W, LI J M, YANG L M, et al.. Local dimming algorithm and color gamut calibration for RGB LED backlight LCD display[J]. Optics & Laser Technology,2011, 43:214-217.

YEO D, KWON Y, KANG E, et al.. Smart algorithms for local dimming LED backlight . SID Digest, 2008:986-989.

DONG M Y, YONG H K. White LED local dimming backlight for aggressive power saving and artifact minimizing . Proc. IMID/IDMC/ASIA Display, 2008:1156-1158.

FUNAMOTO, KOBAYASHI T, MURAO T. High-picture-quality technique for LCD television: LCD-AI . Proc. International Display Workshop, 2000:1157-1158.

REMCO M J, LANGENDIJK E, VOSSEN F. Spatio-temporally consistent video processing for local backlight dimming . SID Digest, 2007:979-982.

SEETZEN H, HEIDRICH W, STUERZLINGER W, et al.. High dynamic range display systems [J]. ACM Transactions on Graphics, 2004:760-768.

LIN F, LIAO C, LIAO L, et al.. Inverse of Mapping Function (IMF) method for image quality enhancement of high dynamic range LCD TVs . SID Digest, 2007:1343-1346.

LAI C, TSAI C. Backlight power reduction and image contrast enhancement using adaptive dimming for global backlight applications [J]. IEEE Transaction on Consumer Electron, 2008, 54(2): 669-674.

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