Relationship between line image sticking and drive signal in TFT-LCD

Lin-lin LIN; Hong-lin ZHANG; Hong-tao LIN; Xiang-nan YUN; Xi CHEN; Yi-qiang LAI; Hong-jiang WU; Yao LIU; Zi-hua ZHUANG; Da-hai LI

doi:10.3788/YJYXS20183305.0375

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Relationship between line image sticking and drive signal in TFT-LCD

Material and Device | 更新时间：2020-08-12

- Relationship between line image sticking and drive signal in TFT-LCD
- Chinese Journal of Liquid Crystals and Displays Vol. 33, Issue 5, Pages: 375-380(2018)
- 作者机构：
  
  福州京东方光电科技有限公司, 福建福州 350300
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20183305.0375
  CLC： TN141
- Received：07 December 2017，
  
  Accepted：12 January 2018，
  
  Published：2018-05
- 稿件说明：
移动端阅览
Lin-lin LIN, Hong-lin ZHANG, Hong-tao LIN, et al. Relationship between line image sticking and drive signal in TFT-LCD[J]. Chinese journal of liquid crystals and displays, 2018, 33(5): 375-380.
DOI：

Lin-lin LIN, Hong-lin ZHANG, Hong-tao LIN, et al. Relationship between line image sticking and drive signal in TFT-LCD[J]. Chinese journal of liquid crystals and displays, 2018, 33(5): 375-380. DOI： 10.3788/YJYXS20183305.0375.

摘要

通过对薄膜晶体管液晶显示器（TFT-LCD）产品易产生线残像的问题进行研究，考察了不同驱动信号电压及反转方式与线残像之间的关系。结果表明，通过减小驱动信号线电压，或提高驱动信号的反转频率，均可降低公共电极与信号线的耦合程度。当灰阶电压由L255减小为L46，耦合电压幅值由240 mV降为34.8 mV；当驱动信号方式由帧反转变为点反转时，耦合电压幅值由112.6 mV降为63.1 mV，有效地改善了线残像，并利用德拜弛豫公式分析了驱动信号反转对线残像的作用机理，为线残像的分析和改善提供了理论依据和解决方向。

Abstract

We investigated the relationship between line image sticking with different drive signal voltages and their inversion modes

because TFT-LCD easily produces line image sticking. The result shows that line image sticking and the coupling between common electrodes and data lines can be reduced by decreasing the drive signal voltage

or increasing the inverse-frequency of drive signal. When the gray level voltage is reduced from L255 to L46

the coupling voltage amplitude is reduced from 240 mV to 34.8 mV. When the driving signal changed from frame inversion to point inversion

the coupling voltage amplitude decreased from 112.6 mV to 63.1 mV. We also analyzed the mechanism of the inversion mode of drive signal on line image sticking by using Debye relaxation formula. The solution and theoretical basis were established for line image sticking by the research.

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references

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