基于平均值法的LED背光源动态调光二次修正算法

杨雷; 李纯怀; 陈宥烨; 李浩; 何振伟; 朱立伟; 屠震涛; 张小宁

doi:null

您当前的位置：

首页 >

文章列表页 >

基于平均值法的LED背光源动态调光二次修正算法

器件驱动与控制 | 更新时间：2020-08-12

- 基于平均值法的LED背光源动态调光二次修正算法
- Dynamic dimming algorithm with twice-correction of LED backlit based on average
- 液晶与显示 2014年29卷第1期页码：101-105
- 作者机构：
  
  1. 深圳市华星光电技术有限公司,广东深圳,518132
  2. 西安交通大学电子物理与器件教育部重点实验室,陕西西安,710049
- 作者简介：
- 基金信息：
  
  国家自然科学基金（No.61372018）()
- DOI：
  中图分类号： TN27
- 收稿日期：2013-08-20，
  
  修回日期：2013-09-05，
  
  纸质出版日期：2014-02-15
- 稿件说明：
移动端阅览
杨雷, 李纯怀, 陈宥烨, 李浩, 何振伟, 朱立伟, 屠震涛, 张小宁. 基于平均值法的LED背光源动态调光二次修正算法[J]. 液晶与显示, 2014,29(1): 101-105

YANG Lei, LI Chun-huai, CHEN Yu-ye, LI Hao, HE Zhen-wei, CHU Li-wei, TU Zhen-tao, ZHANG Xiao-ning. Dynamic dimming algorithm with twice-correction of LED backlit based on average[J]. , 2014,29(1): 101-105
杨雷, 李纯怀, 陈宥烨, 李浩, 何振伟, 朱立伟, 屠震涛, 张小宁. 基于平均值法的LED背光源动态调光二次修正算法[J]. 液晶与显示, 2014,29(1): 101-105 DOI：

YANG Lei, LI Chun-huai, CHEN Yu-ye, LI Hao, HE Zhen-wei, CHU Li-wei, TU Zhen-tao, ZHANG Xiao-ning. Dynamic dimming algorithm with twice-correction of LED backlit based on average[J]. , 2014,29(1): 101-105 DOI：

摘要

为降低LED背光源的功耗，提高LCD的图像显示质量，提出了一种LED背光源动态调光二次修正算法。采用平均值法得到分区的初始背光灰度值；为了解决灰度截断问题，根据分区灰度最大值与平均值的差值进行第一次修正；为了抑制调光带来的光晕效应，采用空间滤波法进行第二次修正。采用侧入式LED背光源的116.8 cm（46 in）LCD实验结果表明，采用该算法后，LED背光源平均功耗降低至73.02%，灰度截断率为0.49%，平均PSNR值为67.21 dB；典型图像对比度最大达到28 600：1，显示图像的光晕效应有了明显的改善。二次修正算法能够有效降低背光功耗，增强图像显示质量。

Abstract

In order to reduce power consumption of LED backlit and improve image quality of LCD

the dynamic dimming algorithm with twice-correction is proposed. Firstly

the values of initial backlight of all LED blocks are calculated with averaging method. Then the first correction values are calculated to resolve grayscale clipping according to the difference between the maximum and average grayscale values in each LED block. Lastly

the second correction values are calculated with spatial filtering method to suppress halo effect caused by dimming. The experiment results on a 116.8 cm(46 in) edge-type LED backlit show that the mean power consumption can be reduced to 73.02% and the grayscale clipping is only 0.49% for the typical pictures. Also the mean PSNR (Peak Signal to Noise Ratio) is 67.21 dB

the maximum contrast ratio can reach to 28 600:1

and halo effect can be suppressed obviously. The dynamic dimming algorithm with twice-correction can improve image quality significantly with a significant reduction in power consumption.

关键词

Keywords

references

张兴, 郑成武, 李宁, 等. 液晶材料与3D显示[J]. 液晶与显示, 2012, 27(4):448-455. Zhang X, Zheng C W, Li N, et al. Liquid crystal materials and 3D display[J]. Chinese Journal of Liquid Crystals and Displays, 2012, 27(4): 448-455. (in Chinese)[2] 周羲君, 冯仕猛. 均匀照明LED背光板设计[J]. 液晶与显示, 2012, 27(6):774-779. Zhou X J, Feng S M. Design of high uniformity LED backlight[J]. Chinese Journal of Liquid Crystals and Displays, 2012, 27(6): 774-779. (in Chinese)[3] 于洪春, 邓意成, 郑喜凤. 面积约束下的最优阈值法分割LED像素点阵[J]. 液晶与显示, 2012, 27(5):653-657. Yu H C, Deng Y C, Zheng X F. Segmentation of LED pixel matrix by using optimal threshold with area constraint[J].Chinese Journal of Liquid Crystals and Displays, 2012, 27(5): 653-657. (in Chinese)[4] 向健勇, 戚勇, 苟超. 分时驱动式LED显示屏图像串扰的解决方法[J]. 液晶与显示, 2013, 28(3):398-402. Xiang J Y, Qi Y, Ge C. Solution of image crosstalk time-sharing driver LED display[J]. Chinese Journal of Liquid Crystals and Displays, 2013, 28(3): 398-402. (in Chinese)[5] 屠震涛, 郑仁涛, 张小宁. 临界背光亮度法改善LCD动态调光中的灰度截断[J]. 液晶与显示, 2012, 27(3):318-323. Tu Z T, Zheng R T, Zhang X N. Critical backlight luminance for reducing clipping artifacts in local dimming LCDs[J]. Chinese Journal of Liquid Crystals and Displays, 2012, 27(3): 318-323.(in Chinese)[6] Hideki I, Katsuya O, Kohji F, et al. Proposal of evaluation method for local-dimming backlights[J]. SID Symposium Digest of Technical Paper, 2010, 50(3):750-753.[7] 章小兵, 王茹, 董戴, 等.基于局部均值和标准差的LCD动态背光调整[J]. 液晶与显示, 2011, 26(5):698-710. Zhang X B, Wang R, Dong D, et al. Dynamic backlight adaptation based on local mean and standard deviation for LCD[J]. Chinese Journal of Liquid Crystals and Displays, 2011, 26(5): 698-710. (in Chinese)[8] Cho H, Kwon O. A local dimming algorithm for low power LCD TVs using edge-type LED backlight[J]. IEEE Transactions on Consumer Electronics, 2010, 56(4): 2054-2060. [9] Hulze H, Greef P. Power savings by local dimming on a LCD panel with side lit backlight[J]. SID Symposium Digest of Technical Paper, 2009, 40(1): 749-752.[10] 章小兵, 刘波, 王茹, 等. 基于灰阶熵的LCD动态背光调整[J]. 液晶与显示, 2012, 27(2):173-176. Zhang X B, Liu B, Wang R, et al. Dynamic backlight adaptation based on gray entropy for LCD[J]. Chinese Journal of Liquid Crystals and Displays, 2012, 27(2): 173-176. (in Chinese)[11] Hong J, Kim S, Song W. A clipping reduction algorithm using backlight luminance compensation for local dimming liquid crystal displays[J]. IEEE Transactions on Consumer Electronics, 2010, 56(1): 240-246.

浏览量

111

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

显示驱动芯片原理及发展现状

某型液晶显示器夜间亮度变化不均匀现象的分析与改进

基于图像局部亮度的液晶显示器动态调光算法

取向层厚度及介电常数对TN-LCD影响的研究

一种基于GA-BP神经网络结合PCA的LCD显示器光谱特征化模型