Reduction of crosstalk between TFT-LCD and capacitive touch panel

Hao CAI; Chao-ping CHEN; Jia-hui LU; Bing YU; Yang LI; Lan-tian MI; Wen-bo ZHANG

doi:10.3788/YJYXS20183306.0504

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Reduction of crosstalk between TFT-LCD and capacitive touch panel

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- Reduction of crosstalk between TFT-LCD and capacitive touch panel
- Chinese Journal of Liquid Crystals and Displays Vol. 33, Issue 6, Pages: 504-510(2018)
- 作者机构：
  
  上海交通大学电子工程系智能显示实验室, 上海 200240
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20183306.0504
  CLC： TP394.1;TH691.9
- Received：31 January 2018，
  
  Accepted：22 March 2018，
  
  Published：2018-06
- 稿件说明：
移动端阅览
Hao CAI, Chao-ping CHEN, Jia-hui LU, et al. Reduction of crosstalk between TFT-LCD and capacitive touch panel[J]. Chinese journal of liquid crystals and displays, 2018, 33(6): 504-510.
DOI：

Hao CAI, Chao-ping CHEN, Jia-hui LU, et al. Reduction of crosstalk between TFT-LCD and capacitive touch panel[J]. Chinese journal of liquid crystals and displays, 2018, 33(6): 504-510. DOI： 10.3788/YJYXS20183306.0504.

摘要

随着显示技术的不断发展，集成触摸屏的液晶显示（LCD）在日常生产与生活中得到了广泛的应用。良好的触屏显示在人机交互方式上扮演着重要角色。然而，外挂式触摸屏在薄化后，触控感测部件和LCD驱动部件之间的距离减小，造成两者之间更紧密的耦合，导致LCD对触摸屏的噪声干扰更加严重，造成误触摸情况发生。为此，我们通过本文研究发现，调节源极数据驱动IC的内置功能及数据信号的驱动方式，可有效改善噪声干扰问题。首先，根据TFT面板阵列的排布，针对性调节源极数据驱动信号，观察噪声干扰的程度。实验结果表明：降低源极数据驱动能力，或更改数据信号的驱动方式为H2Dot时，噪声最大的sub V-stripe画面下的噪声干扰峰值可下降75%。基于上述解决方案，达到了降低噪声干扰的目的，提供给用户更精准、灵敏的触控体验。

Abstract

With the development of display technology

liquid crystal displays integrated with touch panels have been widely used in the daily production and life. Quality touch-integrated display panels play an important role in the human-computer interaction. However

the external touch panel is thinner and thinner

the distance between the touch sensor and LCD driver is reduced

resulting in a closer coupling among these two

which leads to more serious noise interference from LCD to touch panel. In this paper

we find out that the noise interference can be effectively improved by adjusting the function of source driver IC and changing the driving method of data. Firstly

according to the arrangement of TFT array

we adjust the source data driving signal

then observe the level of noise interference. The experimental results show that by reducing the power of the source data drive or changing the driving method of the data signal

the level of noise interference in the sub V-stripe pattern can be reduced by 75%. Based on the above solution

the noise interference is suppressed

which provides users more accurate and sensitive touch experience.

关键词

Keywords

references

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Liaoning Petrochemical Vocational and Technical College, Jinzhou 121001,China, E-mail:liubin7576@163.

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