Capacitive embedded touch screen and display device

Abstract

The invention discloses a capacitive embedded touch screen and a display device. The capacitive embedded touch screen comprises an opposite direction substrate, an array substrate, a black matrix and touch electrodes, wherein the opposite direction substrate and the array substrate are oppositely arranged, the black matrix is located on the side, facing the array substrate, of the opposite direction substrate or the side, facing the opposite direction substrate, of the array substrate, and the touch electrodes are located between the opposite direction substrate and the array substrate. Because an orthographic projection, in the array substrate, of a graph of at least one characteristic touch electrode contained in the touch electrodes is completely located in the area where an orthographic projection, in the array substrate, of a graph of the black matrix is located, the superficial area of the graph of the characteristic touch electrode is set to be larger than the area of the orthographic projection, in the array substrate, of the graph of the characteristic touch electrode. Thus, the superficial area of the characteristic touch electrode is increased so that mutual capacitance of the touch electrodes can be increased. When a human body makes contact with the touch screen, mutual capacitance can be changed obviously, and therefore the touch sensitivity of the capacitive embedded touch screen can be improved.

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] According to the composition and structure, the touch screen can be divided into: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel. Among them, in the embedded touch screen, the touch electrodes of the touch screen are arranged inside the liquid crystal display, which can reduce the overall thickness of the module and greatly reduce the production cost of the touch screen. According to the working principle, the touch screen can be divided into: resistive touch screen and capacitive touch screen. Among them, the capacitive touch screen supports multi-touch function, has high light transmittance and low overall power consumption, and its contact surface has high hardness and long service life. [0003] At present, the existing capacitive in-cell touch screen is realized b...

AI Technical Summary

Problems solved by technology

[0004] In the existing capacitive embedded touch screen, when the material of the touch driving electrodes or the touch sensing electrodes is opaque metal, it is necessary to use a black matrix to cover the touch driving electrodes and the touch sensing electrodes so as not to affect the capacitive internal touch screen. The aperture ratio of the embedded touch screen, therefore, the width of the touch driving electrodes and touch sensing electrodes blocked by the black matrix is ​​limited by the black matrix pattern, which will be limited to a narrow range. However, this will cause the touch driving electrodes and touch sensing electrodes to The mutual capacitance between the control sensing electrodes is small. When the human body touches the touch screen, there will be a problem that the mutual capacitance between the touch driving electrodes and the touch sensing electrodes changes weakly, so that the signal-to-noise ratio of the capacitive embedded touch screen Low, which affects the touch sensitivity of the capacitive in-cell touch screen

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