In cell touch panel and display device

Abstract

The invention discloses an in cell touch panel and a display device. A plurality of self-capacitance electrodes which are arranged in the same layer and insulated from one another are arranged in the touch panel according to the principle of the self-capacitance. A touch detection chip can judge the touch position by detecting the capacitance change of each self-capacitance electrode. Due to the fact that body capacitance acts on all self-capacitance, compared with the condition that the body capacitance only acts on projection capacitance in mutual capacitance, the touch variable quantity caused when the human body touches the panel can be large, and therefore the signal to noise ratio of touch can be effectively improved, and accuracy of touch induction can be improved. In addition, compared with the condition that two new film layers need to be added to an array substrate when the touch function is achieved according to the mutual capacitance principle, the touch function can be achieved only by adding one layer of self-capacitance electrodes according to the in cell touch panel touch screen and the display device, and therefore production cost is saved, and production efficiency is improved.

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 throughout people's lives. At present, touch screens can be divided into three types according to their structure: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel. 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 touch-enabled LCD screen. The plug-in touch screen has high production costs and low light transmittance. Low, thick modules and other shortcomings. The embedded touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module and greatly reduce the production cost of the touch ...

AI Technical Summary

Problems solved by technology

[0005] In the structural design of the above-mentioned capacitive embedded touch screen, the human body capacitance will only couple with the projected capacitance in the mutual capacitance, and the facing capacitance formed by the touch driving electrode and the touch sensing electrode on the opposite side will make the signal of the touch screen Reduced noise ratio affects the accuracy of touch sensing in in-cell touchscreens

Moreover, it is necessary to add two new film layers on the existing TFT array substrate, resulting in the need to add a new process when making the TFT array substrate, which increases the production cost and is not conducive to improving production efficiency

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