Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs

TU Zhen-tao; ZHENG Ren-tao; ZHANG Xiao-ning

doi:10.3788/YJYXS20122703.0318

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Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs

Device Physiscs & Device Technology | 更新时间：2020-08-12

- Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs
- Chinese Journal of Liquid Crystals and Displays Vol. 27, Issue 3, Pages: 318-323(2012)
- 作者机构：
  
  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：
- DOI：10.3788/YJYXS20122703.0318
  CLC： TN873
- Received：10 February 2012，
  
  Revised：20 March 2012，
  
  Published Online：15 June 2012，
  
  Published：15 June 2012
- 稿件说明：
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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,(3): 318-323

TU Zhen-tao, ZHENG Ren-tao, ZHANG Xiao-ning. Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs[J]. , 2012,(3): 318-323
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,(3): 318-323 DOI： 10.3788/YJYXS20122703.0318.

TU Zhen-tao, ZHENG Ren-tao, ZHANG Xiao-ning. Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs[J]. , 2012,(3): 318-323 DOI： 10.3788/YJYXS20122703.0318.

摘要

LED背光源LCD采用动态调光后

为了在灰度截断和功耗之间取得平衡

文章提出了基于临界背光亮度的灰度截断改善方法。该方法首先根据不同的算法分别计算出背光中间模块和边缘模块不产生灰度截断的临界背光亮度

然后将所得到的临界背光亮度与用传统方法得到的对应背光亮度做比较

选择较大值作为最终该模块的理想背光亮度并进行亮度的叠加。液晶补偿的灰度级由叠加后背光亮度得到。81 cm(32 in)LED背光源实验结果表明

该方法能够有效地改善灰度截断

同时功耗没有显著增加。

Abstract

A critical backlight luminance method to get balance between clipping artifacts and power consumption in local dimming LCDs is proposed. Firstly

the critical backlight luminance of middle backlight blocks and edge backlight blocks are computed with different process. Then the critical luminance is compared with the backlight luminance computed by conventional method

and the larger one is selected as the ideal backlight luminance for superimposing luminance. Finally

the gray-scales after liquid crystal compensation can be obtained according to the superimposed backlight luminance. The experiment results with 81 cm(32 in) LED backlight show that clipping artifacts ratio is reduced effectively and power consumption is not increased obviously.

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references

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Chen H F, Ha T H, Sung J H, et al. Quantified evaluation for clipping artifact of local dimming in LCDs //SID 2010 Digest,Seattle, USA:SID,2010:315-318.

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Related Institution

School of Information Engineering, Jiangxi University of Science and Technology

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