An embedded touch screen and display device

Abstract

The invention discloses a built-in touch screen and a display device. Since the self-capacitance electrodes have a plurality of hollowed-out areas, the areas of the respective capacitive electrodes can be reduced, thereby reducing the inherent capacitance of the respective capacitive electrodes. unchanged, the capacitance on the self-capacitance electrode, that is, the inherent capacitance plus finger capacitance, will be relatively smaller, thereby reducing the RC delay of the feedback signal on the self-capacitance electrode; and since the capacitance change on the self-capacitance electrode before and after the touch is relatively Due to the increase of its inherent capacitance, the amount of change of the feedback signal caused by the opposite finger will increase, thereby improving the touch sensitivity of the touch screen. In addition, since the area of ​​the self-capacitance electrode is reduced by setting a hollow area inside the self-capacitance electrode, there is no need to increase the touch blind area between adjacent self-capacitance electrodes, nor to increase the number of self-capacitance electrodes, thereby ensuring On the basis of the narrow frame design, the touch sensitivity of the touch screen is increased.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to an embedded touch screen and a display device. Background technique [0002] With the rapid development of display technology, touch screen panels (Touch Screen Panels) have gradually spread in people's lives. At present, touch screens can be divided into three types according to their composition structure: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel; ) type touch screen can be divided into: mutual capacitance touch screen and self capacitance touch screen. As for the self-capacitance touch screen, due to its high accuracy of touch sensing and relatively high signal-to-noise ratio, it is favored by major panel manufacturers. [0003] At present, the self-capacitance touch screen uses the principle of self-capacitance to detect the touch position of the finger. Specifically, a plurality of self-capacitance electrodes set on the same layer and insulated ...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned existing self-capacitance touch screen, if the number of self-capacitance electrodes is not changed, but the area of ​​the self-capacitance electrodes is only reduced, the gap between the self-capacitance electrodes will increase, thereby increasing the touch blind area; if If the area of ​​the self-capacitance electrode is reduced and the number of self-capacitance electrodes is increased, the number of wires connected to the self-capacitance electrode will increase correspondingly, resulting in the number of peripheral traces arranged at the frame and connected to the wires one by one. There will be a lot of them, which is not conducive to narrow frame design

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