Touch liquid crystal display and color filter substrate

Abstract

The invention relates to a touch liquid crystal display and a color filter substrate for the same. The color filter substrate comprises a common electrode layer and a touch electrode. The touch electrode comprises a driving electrode and an induction electrode. The common electrode layer comprises a driving common electrode and an induction common electrode which are separated from each other. The driving common electrode corresponds to the driving electrode to form a driving parasitic capacitance. The induction common electrode corresponds to the induction electrode to form an induction parasitic capacitance. The driving common electrode and the induction common electrode are connected to a common voltage output end. The touch liquid crystal display and the color filter substrate which are disclosed by the invention cannot generate a current path which passes through the parasitic capacitances in a driving detection circuit, so that a large substrate signal cannot be formed at the position of the detection circuit, and thus, the problem of detection failure caused by the high parasitic capacitances can be avoided.

Description

technical field [0001] The invention relates to the field of touch displays, in particular to a touch liquid crystal display and a color filter substrate used in the touch liquid crystal display. Background technique [0002] As an input medium, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. Therefore, touch screens are more and more applied to various electronic products, such as mobile phones, notebook computers, MP3 / MP4, and the like. In order to reduce the cost of various electronic equipment and make various electronic equipment lighter and thinner, usually a touch screen is integrated into a liquid crystal display panel. [0003] Depending on the working principle and the medium used to detect touch information, touch screens can be divided into four types: resistive, capacitive, infrared, and surface acoustic wave. Capacitive touch screen technology has become the current mainstream touch screen technology ...

AI Technical Summary

Problems solved by technology

Because the signal corresponding to the mutual capacitance change is usually small, it is easy to be submerged in the larger base signal, making it difficult for the detection circuit 56 to detect the signal corresponding to the mutual capacitance change, resulting in detection failure.

[0015] The inventors have found that when the capacitance of the driving parasitic capacitance 54 and the sensing parasitic capacitance 60 is 500pF, as long as the common electrode resistance 57 of 2 ohms and the common electrode inductance 58 of 50 nanohenries will make mutual capacitance detection fail, however, in the actual circuit , such tiny common electrode resistance and common electrode inductance cannot be avoided

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