An embedded touch screen and display device
A technology of embedded touch screen and self-capacitance electrodes, which is applied in the direction of instruments, calculations, electrical digital data processing, etc., can solve the problems of less touch time period and display time period, affecting normal display, insufficient charging during display time period, etc. , to achieve the effect of avoiding interference, good display and touch effect
Active Publication Date: 2021-12-28
HEFEI BOE OPTOELECTRONICS TECH +1
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Problems solved by technology
[0003] In the existing built-in touch screen, in order to reduce the mutual interference between the display signal and the touch signal, improve the image quality and touch accuracy, it is generally necessary to drive the touch and display phases in a time-sharing manner. The time is generally a fixed value, so the time-sharing drive results in less time for the touch time period and the display time period, which may cause insufficient charging during the display time period and affect the normal display, and may detect during the touch time period The signal time is too short to affect the touch effect and other issues
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[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] The shapes and sizes of the components in the drawings do not reflect the real scale, but are only intended to schematically illustrate the content of the present invention.
[0022] An embedded touch screen provided by an embodiment of the present invention, such as figure 1 As shown, it includes an array substrate 10 and an opposite substrate 20, the array substrate 10 includes a base substrate 1, and a self-capacitance electro...
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Abstract
The invention discloses an embedded touch screen and a display device. The self-capacitance electrode layer, an insulating layer, and a transparent shielding layer are sequentially stacked on the side of the base substrate of the array substrate in the touch screen facing the opposite substrate by using the self-capacitance principle. The electrode layer and the pixel unit layer use a transparent shielding electrode insulated from the self-capacitance electrode to isolate the touch detection signal loaded by the self-capacitance from the display signal, avoiding interference between the two, and can realize touch detection and display driving. Simultaneous execution ensures better display and touch effects.
Description
technical field [0001] The invention relates to a display device, in particular to an embedded touch screen and a display device. Background technique [0002] At present, the existing in-cell touch screen uses the principle of mutual capacitance or self-capacitance to detect the finger touch position. Among them, the principle of self-capacitance can be used to set a plurality of self-capacitance electrodes on the same layer and insulated from each other in the touch screen. When the human body does not touch the screen, the capacitance of each capacitive electrode is a fixed value. When the human body touches the screen , the capacitance of the corresponding self-capacitance electrodes is a fixed value superimposed on the human body capacitance, and the touch detection chip can determine the touch position by detecting the capacitance value changes of the respective capacitance electrodes during the touch period. Since the human body capacitance can act on all self-capaci...
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IPC IPC(8): G06F3/044
CPCG06F3/044
Inventor 张雷邵贤杰陈俊生
Owner HEFEI BOE OPTOELECTRONICS TECH