touch screen, touch LCD

Abstract

A touch screen and a touch liquid crystal display comprising the same are disclosed. The touch screen comprises an electrode layer, a connecting wire layer, and an insulating medium layer located between the electrode layer and the connecting wire layer, wherein the electrode layer comprises a drive electrode and a sensing electrode; the driver electrode and the sensing electrode are used for mutual capacitance; the connecting wire layer comprises a connecting wire for realizing electric connection of the drive electrode with a drive wire with the peripheral region of the touch screen; and the insulating medium layer comprises a via hole for realizing the electric connection of the drive electrode with the connecting wire. The touch screen is high in the accuracy of detecting a finger touch position.

Description

technical field [0001] The invention relates to the field of touch displays, in particular to a mutual capacitance touch screen. 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 due to its simple process, long life, and high light transmittance....

AI Technical Summary

Problems solved by technology

When a finger touches the touch screen, for example Figure 5 In the position indicated by the middle circle, the finger forms a coupling capacitance with the driving electrode 71d, and also forms a coupling capacitance with the connection lines 16a, 16b, 16c, and 16d, and the coupling capacitance formed between the finger and the connection lines 16a, 16b, 16c, and 16d also forms a coupling capacitance. It will change the mutual capacitance, so that noise signals will be mixed into the signal detected by the detection circuit, which will affect the accuracy of detection

[0013] In addition, since the connecting wires 16a, 16b, 16c, 16d, and 16e are arranged in parallel in the single-layer touch screen, the area of ​​the touch screen will be occupied, so that the area of ​​the driving electrodes located below becomes smaller.

like Figure 5 As shown, the area of ​​the driving electrodes 71e in the last row is much smaller than the area of ​​the driving electrodes 71a in the first row, and the smaller the area of ​​the driving electrodes, the smaller the coupling capacitance between the driving electrodes and the finger, thereby increasing the detection circuit's interaction with each other. The difficulty of detecting capacitance changes will also affect the accuracy of detection

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