Low power driver method based on TFT-LCD

ZHANG Bin; XIE Yu; LIU Chen-xi; CHEN Wei-tao

doi:10.3788/YJYXS20163103.0290

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Low power driver method based on TFT-LCD

Driving and Controlling | 更新时间：2020-08-12

- Low power driver method based on TFT-LCD
- Chinese Journal of Liquid Crystals and Displays Vol. 31, Issue 3, Pages: 290-294(2016)
- 作者机构：
  
  北京京东方显示技术有限公司北京,中国,100176
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20163103.0290
  CLC： TN27
- Received：14 September 2015，
  
  Revised：25 November 2015，
  
  Published：05 March 2016
- 稿件说明：
移动端阅览
张斌, 解宇, 刘陈曦等. 基于液晶显示屏的低功耗驱动技术[J]. 液晶与显示, 2016,31(3): 290-294

ZHANG Bin, XIE Yu, LIU Chen-xi etc. Low power driver method based on TFT-LCD[J]. , 2016,31(3): 290-294
张斌, 解宇, 刘陈曦等. 基于液晶显示屏的低功耗驱动技术[J]. 液晶与显示, 2016,31(3): 290-294 DOI： 10.3788/YJYXS20163103.0290.

ZHANG Bin, XIE Yu, LIU Chen-xi etc. Low power driver method based on TFT-LCD[J]. , 2016,31(3): 290-294 DOI： 10.3788/YJYXS20163103.0290.

摘要

为进一步降低液晶显示器的逻辑功耗

本文以11.6HD、14HD、14FHD为背景

分别从像素结构、驱动技术、驱动电路设计以及背光驱动技术等方面进行了深入研究。首先

研究了不同像素结构(dual Gate+normal像素结构和dual Gate+Z inversion像素结构)下多种像素驱动方法对功耗的影响。接着

研究了像素负载以及像素驱动信号(包括栅极驱动信号和源极驱动信号)对功耗的影响。最后

对比了不同的背光调光方法对功耗的影响。实验结果表明:像素结构、负载大小、驱动方法均对功耗有较大的影响。以14HD为例

点翻转比列翻转会有38.5%的功耗上升;Data load 每上升10%

功耗约有 8%的上升;VGH每提高1 V

功耗上升 1.35 mW;采用mix-mode调光方式比传统的PWM调光在不同亮度百分比下功耗约降低2%~15%。因此通过对这些功能模块进行优化设计可以有效地降低液晶显示器逻辑功耗。

Abstract

In order to reduce the power consumption of the TFT-LCD

some methods were studied in this paper. These methods include pixel structure

drive method

circuit design and backlight drive based on the 11.6 HD

14 HD and 14 FHD. First

the influence of pixel structure on power consumption is studied which use different pixel structure (dual Gate+normal pixel structure and dual Gate+Z inversion pixel structure) under a variety of pixel driving method. Second

the influence of pixels load and pixel driving signal which include Gate and source drive signal on power consumption is studied. Finally

power consumption between PWM dimming and mix-mode dimming at the same BLU is compared. The result shows the pixel structure

pixel loading and driving method have great influence on power consumption. For example

dot inversion will add 38.5% than column inversion in power consumption at 14HD product. When data load rose 10%

there is about 8% of power consumption added. When the VGH increase about 1 V

there is 1.35 mW power added. Mix mode dimming can decrease power about 2%~15% than the traditional PWM dimming under different brightness. Therefore

the optimization design of these methods can effectively reduce the power consumption of TFT-LCD.

关键词

Keywords

references

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INJAE H, SEUNGJAE K, SANGMOON M, et al. Accurate power estimation of LCD panels for notebook PC applications[C]. SID Symposium Digest of Technical Papers, USA:SID, 2007:264-267.

YUN S C, LEE C D, NAM Y S, et al. New driving method for low logic power consumption in TFT-LCDs[C]. SID Symposium Digest of Technical Papers, USA:SID, 2010:619-621.

NAM H, PARK M K, KIM A R, et al. Low power driving scheme for high frame rate LCD TVs[C]. SID Symposium Digest of Technical Papers, USA:SID, 2010:311-314.

NICOLAS G. The half VDD supply rail helps reducing power consumption and cost for LCD systems[C]. IMID 2010 DIGEST, Asia:IMID, 2010:285-286.

OH D S, SANG W K, PARK Y K, et al. Low frequency driving display to reduce logic power in liquid crystal display[C]. SID Symposium Digest of Technical Papers, San Diego, CA, USA:SID, 2014:1199-1202.

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