Research and improvement of black screen light leakage in narrow-length automotive display

Lei MAO; Zheng-yuan ZHANG; Rong-hua FAN; Yan-li LOU; Pei ZI; Yi YANG; Shi-de ZHANG; gan REN; Chun-li LI; Xun-nan WANG

doi:10.3788/YJYXS20193410.0982

您当前的位置：

首页 >

文章列表页 >

Research and improvement of black screen light leakage in narrow-length automotive display

Materials and Devices | 更新时间：2020-08-12

- Research and improvement of black screen light leakage in narrow-length automotive display
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 10, Pages: 982-991(2019)
- 作者机构：
  
  合肥鑫晟光电科技有限公司, 安徽合肥 230012
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20193410.0982
  CLC： TN141.9
- Received：14 May 2019，
  
  Accepted：05 August 2019，
  
  Published：05 October 2019
- 稿件说明：
移动端阅览
Lei MAO, Zheng-yuan ZHANG, Rong-hua FAN, et al. Research and improvement of black screen light leakage in narrow-length automotive display[J]. Chinese journal of liquid crystals and displays, 2019, 34(10): 982-991.
DOI：

Lei MAO, Zheng-yuan ZHANG, Rong-hua FAN, et al. Research and improvement of black screen light leakage in narrow-length automotive display[J]. Chinese journal of liquid crystals and displays, 2019, 34(10): 982-991. DOI： 10.3788/YJYXS20193410.0982.

摘要

黑画面的漏光是高级超维场开关显示模式（Advanced-Super Dimensional Switching，ADS）TFT-LCD中常见的一种不良，当液晶面板有形变或应力作用即容易发生漏光不良，窄长型ADS车载产品更容易受力形变。本文探讨漏光发生的机理并进行改善。研究发现，面板由于形变，内应力，液晶偏转发生异常，最终导致黑画面的漏光。本文以312.4 mm（12.3 in）寸窄长型车载ADS产品为例，首先对平坦度进行分析：从面板平坦度、背光源平坦度、背光源口子胶位置等方面分析。再从应力着手：从模组将集成电路压接在玻璃基板上的工艺（Chip on Glass，COG）、面板和背光源的组装精度进行漏光实验。实验结果表明，在面板平坦度提升、背光源平坦度管控、背光源口子胶设计为半口子胶并由长边固定变更为短边固定，COG绑定温度和压力进行实验设计、组装精度提升等方面改善后，黑画面漏光可从15%降低至0.1%以内。

Abstract

Black light leakage is a common in advanced-super dimensional switching(ADS) mode TFT-LCD product. It is easy to cause light leakage when the panel has deformation or internal stress

especially for narrow-length products. This article discussed the reason of light leakage and improve it. It is found that the panel deformation

internal stress

and liquid crystal deflection are abnormal

which can lead to light leakage. For example

this paper discusses 312.4 mm(12.3 in) ADS automotive product. At first

for flatness:we analyzed the panel flatness

backlight flatness and the location of backlight tape. Second

for internal stress:we analyzed COG (Chip on Glass) technology

assembly accuracy of panel and backlight. Light leakage experiments show that improvement of panel flatness

backlight flatness and assembly accuracy can reduce the level of leakage. Other factors

such as cutting the length of backlight tape and changing its position from long side to short side

controlling COG bonding temperature and pressure with DOE(Design of Experiment) are also effective. All the above measures

light leakage can be reduced from 15% to less than 0.1%.

关键词

Keywords

references

袁静, 宋冠男, 田超.显示模组和显示装置: 中国, CN104297961A[P].2015-01-21.

YUAN J, SONG G N, TIAN C. Display module and display device: CN, CN104297961A[P]. 2015-01-21. (in Chinese)

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, 2016:155-176.

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: 155-176. (in Chinese)

见帅敏, 解洋, 夏高飞, 等.TFT-LCD边角漏光不良机理分析及改善研究[J].液晶与显示, 2017, 32(6):455-460.

JIAN S M, XIE Y, XIA G F, et al . Analysis and improvement of TFT-LCD edge light-leaking mechanism[J] . Chinese Journal of Liquid Crystals and Displays , 2017, 32(6): 455-460. (in Chinese)

胡伟, 穆洪杨, 谈宝权, 等.散射光弹性技术在化学钢化玻璃表面应力测量中的应用[J].玻璃与搪瓷, 2017, 45(5):29-33.

HU W, MU H Y, TAN B Q, et al . Measurement of surface stress of chemically strengthened glass by scattered light photoelasticity[J]. Glass & Enamel , 2017, 45(5): 29-33. (in Chinese)

王自明, 付淑敏, 姚卫国, 等.有机玻璃光弹性性能的实验研究[J].材料工程, 1983(1):19-21.

WANG Z M, FU S M, YAO W G, et al . Experimental study on photo elastic properties of plexiglass[J]. Journal of Materials Engineering , 1983(1): 19-21. (in Chinese)

廖红波, 王婷, 何琛娟, 等.液晶盒双折射效应的测量与应用[J].大学物理, 2016, 35(8):44-47.

LIAO H B, WANG T, HE C J, et al . The measurement and application of the birefringence effect in liquid crystal cell[J]. College Physics , 2016, 35(8): 44-47. (in Chinese)

李兴华, 暴军萍, 徐兵, 等.液晶显示器模组黑态均匀性改善研究[J].液晶与显示, 2018, 33(4):271-276.

LI X H, BAO J P, XU B, et al . Improvement research of TFT-LCD module black uniformity[J]. Chinese Journal of Liquid Crystals and Displays , 2018, 33(4): 271-276. (in Chinese)

王永超, 张志东, 周璇.向列相液晶弹性各向异性诱导液晶盒产生漏光的研究[J].液晶与显示, 2015, 30(6):949-959.

WANG Y C, ZHANG Z D, ZHOU X. Study of light leakage induced by the elastic anisotropy of the nematic liquid crystal[J]. Chinese Journal of Liquid Crystals and Displays , 2015, 30(6): 949-959. (in Chinese)

尹刚, 李成龙, 陆建钢.IPS模式液晶显示器件中COG Mura的改善[J].工业设计, 2016(3):173, 179.

YIN G, LI C L, LU J G. Improvement of COG Mura in IPS mode liquid crystal display device[J]. Industrial Design , 2016(3): 173, 179. (in Chinese)

车树勤.扇形弧长与面积公式之应应用[J].中学课程辅导:高考版, 2011(11):33.

CHE S Q. Thin film transistor liquid crystal display display principle and design[J]. Publishing House of Electronics Industry, 2011(11): 33. (in Chinese)

赵国玲, 黄永雄.车载背光源自动贴膜组装机的设计与应用[J].企业技术开发, 2017, 36(12):34-36.

ZHAO G L, HUANG Y X. Design and application of vehicle backlight automatic film assembly machine[J]. Technological Development of Enterprise , 2017, 36(12): 34-36. (in Chinese)

Views

100

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Optical compensation methods for eliminating the off-axis light leakage in in-plane switching liquid crystal display

Analysis and improvement research of black uniformity for tablet personal computer production

Design of high contrast in-plane-switching polymer-stabilized blue phase liquid crystal display device based on rhombus electrodes

Improvement of uniformity of TFT lithography DICD

Study of light leakage induced by the elastic anisotropy of the nematic liquid crystal

Related Author

Yu-bao SUN

Hong-mei MA

Mei-shan ZHANG

Zhu-hui LONG

Yong-yong JIANG

Jian WU

Dong GUO

Wei-jing LIAO

Related Institution

Department of Applied Physics，Hebei University of Technology

Hefei Xinsheng Optoelectronics Technology Co. Ltd

AUOptronics, Hsinchu

Thorlabs China

Hefei BOE Optoelectronics Technology Co. Ltd

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China 130033 Postal code：130033
Tel：0431-86176059 Email：yjxs@ciomp.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰