首页 > 论文 > 液晶与显示 > 33卷 > 4期(pp:277-284)

TFT-LCD公共电压耦合畸变的影响因素及与线残像关系的研究

Influencing factors of TFT-LCD common voltage on the coupling of signal voltage and the relationship with line image sticking

  • 摘要
  • 论文信息
  • 参考文献
  • 被引情况
  • PDF全文
分享:

摘要

为了解决TFT-LCD的线残像不良,对信号线与公共电极之间的电压耦合的大小和影响因素进行了研究。利用金属熔接技术,测量了屏内公共电极电压在信号线电压作用下发生的耦合畸变的大小,并将其与线残像的严重程度进行了对比。同时通过对不同的影响因素,即版图设计、信号线电压及反转方式、TFT工艺流程、TFT膜质调整分别进行了研究和测试。结果显示信号线和公共电极及绝缘层构成了MIS结构的电容,电容容值的变化导致的公共电压耦合程度与线残像的严重程度呈现明显的对应关系。通过改变非晶硅半导体层的介电常数或者尺寸设计,可以减小信号线与公共电极间的寄生电容(包括信号线金属与公共电极线金属的交叠电容和信号线与像素公共电极间的侧向电容),降低公共电极电压的耦合程度,改善线残像不良。其中提高信号电压转换频率和用紫外光照射半导体层的改善效果最为明显,耦合电压分别下降了55%和62%,线残像的消失灰阶从L172或更高转变为低于L127。研究成果对于大尺寸、高分辨率、高亮度、低功耗的TFT-LCD产品的设计和性能改善,有着重要的指导和参考意义。

Abstract

In order to solve the line image sticking issue of TFT-LCD, the data of coupling voltage between the data lines and the common electrode as well as the influencing factors were studied. By using metal welding technology, the common voltage (Vcom) distortion induced by signal voltage was measured and compared with the severity of the line image sticking. At the same time, the different influencing factors such as the mask design, the amplitude and frame change frequency of the signal, the TFT process and the adjustment of the film characters were studied respectively. The results showed that the change of the stray capacitance between the data lines and common electrode caused the Vcom distortion, which is corresponding to the line image sticking. Altering the permittivity or dimensions of the amorphous silicon layer can decrease the stray capacitance (including the overlap capacitance between the data lines and common voltage lines, and the side capacitance between the data lines and the common electrode within the pixels), so the Vcom distortion can be lowered and the line image sticking improved. Among the solutions, rising the frame change frequency or irradiating the amorphous silicon layer with UV have the best results, which the Vcom distortions were fallen down by 55% and 62%, and the gray level that the line image sticking vanished was turned down from L127 to below L127. The research achievements could be the important guide and reference to the new TFT-LCD with large size, high resolution, high brightness and low power consumption.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:TN141

DOI:10.3788/yjyxs20183304.0277

所属栏目:材料与器件

收稿日期:2017-12-06

修改稿日期:2018-01-17

网络出版日期:--

作者单位    点击查看

林鸿涛:福州京东方光电科技有限公司,福建 福州 350300
陈 曦:福州京东方光电科技有限公司,福建 福州 350300
庄子华:福州京东方光电科技有限公司,福建 福州 350300
赖意强:福州京东方光电科技有限公司,福建 福州 350300
袁剑峰:重庆京东方光电科技有限公司,重庆 400714
邵喜斌:京东方科技集团股份有限公司,北京 100176

联系人作者:林鸿涛(linhongtao@boe.com.cn)

备注:林鸿涛(1970-),男,吉林长春人,1993年毕业于中国科学技大学,获得理学学士学位,现为京东方科技集团Panel开发中心高级专家,主要从事TFT-LCD产品不良解析方面的研究。

【1】SHEEDY J E. VDTs and vision complaints: A survey [J]. Information Display, 1992, 8(4/5): 20-23.

【2】ISENSEE S H, BENNETT C A. The perception of Flicker and Glare on computer CRT displays [J]. Human Factors, 1983, 25(2): 177-184.

【3】马群刚.TFT-LCD原理与设计[M].北京:电子工业出版社,2011.
MA Q G. Principle and Design of TFT-LCD [M]. Beijing: Publishing House of Electronics Industry, 2011. (in Chinese)

【4】戴亚翔.TFT LCD面板的驱动与设计[M].北京:清华大学出版社,2008.
DAI Y X. Design and Operation of TFT LCD Panels [M]. Beijing: Tsinghua University Press, 2008. (in Chinese)

【5】田民波,叶锋.TFT液晶显示原理与技术[M].北京:科学出版社,2010.
TIAN M B, YE F. Principle and Technology of TFT Liquid Display [M]. Beijing: Science Press, 2010. (in Chinese)

【6】廖燕平,宋勇志,邵喜斌,等.薄膜晶体管液晶显示器显示原理与设计[M].北京:电子工业出版社,2016.
LIAO Y P, SONG Y Z, SHAO X B, et al. Thin Film Transistor Liquid Crystal Display [M]. Beijing: Publishing House of Electronics Industry, 2016. (in Chinese)

【7】杨虹,唐志勇,凌志华,等.VGA TFT LCD的驱动电路设计[J].液晶与显示,2001,16(1):52-58.
YANG H, TANG Z Y, LING Z H, et al. Design of driving circuit for VGA TFT LCD [J]. Chinese Journal of Liquid Crystals and Displays, 2001, 16(1): 52-58. (in Chinese)

【8】杨虹,王刚.TFT液晶显示屏驱动方法的研究[J].微电子学,2000,30(1):39-42.
YANG H, WANG G. A study on driving techniques for thin-film-transistor liquid crystal display [J]. Microelectronics, 2000, 30(1): 39-42. (in Chinese)

【9】殷之文.电介质物理学[M].2版.北京:科学出版社,2003.
YIN Z W. Dielectric Physics [M]. 2nd ed. Beijing: Science Press, 2003. (in Chinese)

【10】ZHUANG Z H, YANG X Y, CHEN X, et al. Influence of illumination on Vcom distortion[S]. Society for Information Display, 2018: 150.

【11】ZHAOY P, ZHANG D L, KONG G L, et al. Evidence for light-induced increase of Si-H bonds in undoped a-Si:H [J]. Physical Review Letters, 1995, 74(4): 558-561.

【12】YUE G Z, KONG G L, ZHANG D L, et al. Dielectric response and its light-induced change in undoped a-Si:H films below 13 MHz[J]. Physical Review B, 1998, 57(4): 2387-2392.

【13】林鸿涛,郤玉生,胡海琛,等.TFT-LCD中驱动信号对线残像的改善研究[J].液晶与显示,2012,27(3):359-363.
LIN H T, XI Y S, HU H C, et al. Improvement research of line image sticking by drive signal in TFT-LCD [J]. Chinese Journal of Liquid Crystals and Displays, 2012, 27(3): 359-363. (in Chinese)

引用该论文

LIN Hong-tao,CHEN Xi,ZHUANG Zi-hua,LAI Yi-chiang,YUAN Jian-feng,SHAO Xi-bin. Influencing factors of TFT-LCD common voltage on the coupling of signal voltage and the relationship with line image sticking[J]. Chinese Journal of Liquid Crystals and Displays, 2018, 33(4): 277-284

林鸿涛,陈 曦,庄子华,赖意强,袁剑峰,邵喜斌. TFT-LCD公共电压耦合畸变的影响因素及与线残像关系的研究[J]. 液晶与显示, 2018, 33(4): 277-284

您的浏览器不支持PDF插件,请使用最新的(Chrome/Fire Fox等)浏览器.或者您还可以点击此处下载该论文PDF