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TFT-LCD中驱动信号与线残像的关系研究

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

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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.

Newport宣传-MKS新实验室计划
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DOI:10.3788/yjyxs20183305.0375

所属栏目:材料与器件

收稿日期:2017-12-07

修改稿日期:2018-01-12

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作者单位    点击查看

林琳琳:福州京东方光电科技有限公司,福建 福州 350300
张洪林:福州京东方光电科技有限公司,福建 福州 350300
林鸿涛:福州京东方光电科技有限公司,福建 福州 350300
贠向南: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
赖意强:福州京东方光电科技有限公司,福建 福州 350300
吴洪江:福州京东方光电科技有限公司,福建 福州 350300
刘 耀: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
李大海:福州京东方光电科技有限公司,福建 福州 350300

联系人作者:林琳琳(linlinlin@boe.com.cn)

备注:林琳琳(1990-),女,福建平潭人,硕士,中级研究员,主要从事TFT-LCD相关研发工作。

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引用该论文

LIN Lin-lin,ZHANG Hong-lin,LIN Hong-tao,YUN Xiang-nan,CHEN Xi,LAI Yi-qiang,WU Hong-jiang,LIU Yao,ZHUANG Zi-hua,LI Da-hai. Relationship between line image sticking and drive signal in TFT-LCD[J]. Chinese Journal of Liquid Crystals and Displays, 2018, 33(5): 375-380

林琳琳,张洪林,林鸿涛,贠向南,陈 曦,赖意强,吴洪江,刘 耀,庄子华,李大海. TFT-LCD中驱动信号与线残像的关系研究[J]. 液晶与显示, 2018, 33(5): 375-380

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