Array substrate, touch screen and touch display device

Abstract

The present invention discloses an array substrate. The array substrate comprises: a display area, a plurality of sub-pixels, a plurality of touch electrodes arranged in a matrix manner and a plurality of touch signal lines for electrically connecting the touch electrodes to an integrated circuit, wherein the width W of each touch electrode in a first direction and the length E of the display area in a second direction meet a formula shown in the specification; and in the formula, A is an effective resistance value of a touch signal line corresponding to a touch electrode that is farthest away from the integrated circuit in the first direction, B is the width of each touch signal line in the first direction, C is sheet resistance of the touch signal line, and D is the width of each sub-pixel in the first direction. The array substrate provided by the present invention can obtain relatively good touch performance; and in the meantime, the touch electrodes are large enough, so that all the touch signal lines electrically connected to each column of the touch electrodes are all located within the coverage range of the column of the touch electrodes, and the pixel aperture ratio is not affected.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an array substrate integrated with a touch function, a touch screen and a touch display device. Background technique [0002] With the development of electronic technology, the functions of various display devices such as liquid crystal display (LCD), plasma display panel (PDP) and organic light-emitting diode display (OLED) are not limited to receiving video signals and then displaying them. Today's display The device is also integrated with a touch function, that is, it can input control instructions according to the operator's touch operation information on the display device. Therefore, in the prior art, using technologies such as resistive touch sensing technology, capacitive touch sensing technology, electromagnetic induction technology, infrared (IR) touch sensing technology, and ultrasonic touch sensing technology A touch sensing method selected from various tou...

AI Technical Summary

Problems solved by technology

However, regardless of the structure of the touch screen, it is necessary to make touch signal lines connected to the touch electrodes. The touch signal lines are usually made of metal materials. In order to avoid the problems of blocking light and visible appearance, these The touch signal lines are set at the position facing the black matrix of the color filter substrate, so these touch signal lines will be made relatively thin, resulting in excessive resistance of the touch signal lines, affecting touch performance

In order to solve this problem, at present, the commonly used method is to increase the thickness of the touch signal line, but increasing the thickness of the touch signal line will increase the step difference at the touch signal line on the array substrate, thereby affecting the coating of the alignment film. Rubbing against the rubbing cloth, in this case, it is easy to cause light leakage of pixels in the black screen, etc., which will eventually lead to problems such as decreased contrast and visible touch signal lines.

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