金属氧化物TFT阈值对LCD显示屏可靠性的影响

楼均辉; 姜姝; 吴天一; 符鞠建; 夏兴达; 何泽尚; 迟宵; 应变; 李喜峰

doi:10.3788/fgxb20183903.0383

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金属氧化物TFT阈值对LCD显示屏可靠性的影响

器件制备及器件物理 | 更新时间：2020-08-12

- 金属氧化物TFT阈值对LCD显示屏可靠性的影响
- Effect of Threshold-voltage of Oxide-TFT on The Reliability of LCD Display
- 发光学报 2018年39卷第3期页码：383-387
- 作者机构：
  
  1. 上海大学新型显示技术及应用集成教育部重点实验室上海,200072
  2. 天马微电子集团上海,201205
- 作者简介：
- 基金信息：
  
  国家高技术研究发展计划（863）（2015AA033406）();上海市科委项目（16JC1400602，17DZ2291500）资助()
- DOI：10.3788/fgxb20183903.0383
  中图分类号： TN321+.5
- 纸质出版日期：2018-3-5，
  
  网络出版日期：2017-9-18，
  
  收稿日期：2017-7-11，
  
  修回日期：2017-8-27，
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楼均辉, 姜姝, 吴天一等. 金属氧化物TFT阈值对LCD显示屏可靠性的影响[J]. 发光学报, 2018,39(3): 383-387

LOU Jun-hui, JIANG Shu, WU Tian-yi etc. Effect of Threshold-voltage of Oxide-TFT on The Reliability of LCD Display[J]. Chinese Journal of Luminescence, 2018,39(3): 383-387
楼均辉, 姜姝, 吴天一等. 金属氧化物TFT阈值对LCD显示屏可靠性的影响[J]. 发光学报, 2018,39(3): 383-387 DOI： 10.3788/fgxb20183903.0383.

LOU Jun-hui, JIANG Shu, WU Tian-yi etc. Effect of Threshold-voltage of Oxide-TFT on The Reliability of LCD Display[J]. Chinese Journal of Luminescence, 2018,39(3): 383-387 DOI： 10.3788/fgxb20183903.0383.

摘要

TFT的器件特性是影响氧化物TFT驱动的LCD显示屏良率的关键因素。本文研究了氧化物TFT的关键特性参数（阈值，稳定性）对窄边框LCD显示屏的良率和可靠性的影响。氧化物TFT阈值过负，将会导致TFT无法正常关断，而使显示屏的外围移位寄存器（VSR）电路失效。另外，在显示区域用于像素驱动的氧化物TFT的高温和背光照射下阈值持续负向漂移，最终会导致显示区域的驱动TFT漏电流过大，从而使显示屏出现串扰和残影不良。

Abstract

The characteristics of TFT are critical to the reliability of metal oxide-TFT drived LCD. The effect of

and stability of oxide-TFT to the reliability of narrow-bezel LCD display were researched. The negative

of the normal-on oxide-TFT can result in the failure of VSR scan circuits. Others

the negative-shift of the

of TFT in pixel at high temperature and under back-light illumination can cause the

negative shift and results in the cross-talk or image-sticking because of the high leakage current of TFT.

关键词

金属氧化物薄膜晶体管阈值LCD可靠性

Keywords

oxide TFTthreshold-voltage (Vth)LCDreliability

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