A capacitive embedded touch screen and display device

A touch screen and capacitive technology, applied in the direction of electrical digital data processing, instrumentation, data processing input/output process, etc., can solve the problems of difficult touch detection and excessive mutual capacitance, so as to improve picture quality and reduce mutual capacitance , The effect of increasing the ratio of mutual capacitance variation

Active Publication Date: 2016-08-03
BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a capacitive in-cell touch screen and a display device, which are used to solve the problem that the mutual capacitance generated between the touch drive electrodes and the touch-sensing electrodes in the existing in-cell touch screen is too large, resulting in difficulty in touch control. detection problem

Method used

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  • A capacitive embedded touch screen and display device
  • A capacitive embedded touch screen and display device
  • A capacitive embedded touch screen and display device

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Embodiment Construction

[0019] At present, liquid crystal display technologies that can realize wide viewing angles mainly include In-Plane Switch (IPS, In-PlaneSwitch) technology and Advanced SuperDimension Switch (ADS, Advanced SuperDimensionSwitch) technology; among them, ADS technology is generated by the edge of the slit electrode in the same plane. The electric field and the electric field generated between the slit electrode layer and the plate electrode layer form a multidimensional electric field, so that all oriented liquid crystal molecules between the slit electrodes in the liquid crystal cell and directly above the electrodes can be rotated, thereby improving the working efficiency of the liquid crystal and increasing the size of the liquid crystal. light transmission efficiency. Advanced ultra-dimensional field conversion technology can improve the picture quality of TFT-LCD products, and has the advantages of high resolution, high transmittance, low power consumption, wide viewing angle...

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Abstract

The invention discloses a capacitance type embedded touch screen and a display device. A public electrode layer connected in a manner of a whole surface in a TFT (Thin Film Transistor) array substrate is divided to form mutually insulated and crossly arranged touch driving electrodes and public electrodes; a touch sensing electrode is arranged on a colorful film substrate; and time-sharing driving is performed on the touch driving electrodes to realize a touch function and a display function. As the projection of the touch sensing electrode on the TFT array substrate is located in an area where the public electrodes are of the touch screen provided by the embodiment of the invention, and the public electrodes and the touch driving electrodes are located at the same layer but insulated mutually, an enfilade area generated between the touch sensing electrode and the touch driving electrodes is avoided, a mutual capacitance formed by the enfilade area is reduced, a proportion of a mutual capacitance variation quantity caused by touch of a finger is added, and touch accuracy is improved. In addition, as the time-sharing driving touch and display functions are adopted, mutual interference is also reduced, and picture quality is increased.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a capacitive embedded touch screen and a display device. Background technique [0002] With the rapid development of display technology, touch screens (TouchScreenPanel) have gradually spread throughout people's lives. At present, the touch screen can be divided into three types according to the structure: an add-on touch screen (AddonModeTouchPanel), a surface-covering touch screen (OnCellTouchPanel), and an in-cell touch screen (InCellTouchPanel). Among them, the plug-in touch screen is produced separately from the touch screen and Liquid Crystal Display (LCD), and then bonded together to form a liquid crystal display with touch function. The plug-in touch screen has high production costs, low light transmittance, The module is thicker and other shortcomings. The embedded touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display, which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 刘英明董学王海生丁小梁杨盛际赵卫杰任涛刘红娟王春雷王磊
Owner BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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