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Capacitive touch screen with mesh-like electrodes

A capacitive touch screen, mesh electrode technology, applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problems of screen damage, bridge fusing, bridge resistance, etc., to increase short-range capacitance , Improved linearity, high effective permittivity effect

Inactive Publication Date: 2012-04-04
FOCALTECH SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the bridge resistance of the conductive material bridge is too large or the width of the bridge is too small, the bridge resistance will be too large. When ESD (Electrostatic Discharge) occurs, the bridge bridge will be easily blown due to excessive current. , resulting in damage to the screen

Method used

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  • Capacitive touch screen with mesh-like electrodes
  • Capacitive touch screen with mesh-like electrodes
  • Capacitive touch screen with mesh-like electrodes

Examples

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Embodiment Construction

[0035] Further details will be given below in conjunction with various embodiments shown in the accompanying drawings.

[0036] The present invention proposes a capacitive touch screen with mesh electrodes, such as figure 1 , Figure 8 , Figure 11 As shown, it includes a first electrode group 100, a second electrode group 200 and a data processing module 300 made of transparent conductive materials. The first electrode group 100 includes first electrodes 110 parallel to each other, and the second electrode group 200 includes second electrodes 210 parallel to each other. Any one of the first electrodes 110 and any one of the second electrodes 210 are arranged orthogonally without contacting each other. The transparent conductive material includes Indium Tin Oxide, referred to as ITO and Antimony Tin Oxide doped with antimony, referred to as ATO. The data processing module 300 is used for sending excitation signals, detecting capacitance changes and determining touch posit...

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Abstract

The invention relates to a capacitive touch screen with mesh-like electrodes, comprising a first electrode and a second electrode which are made of transparent conductive materials and are arranged orthogonally in a non-contact way. Particularly, at least one of the first electrode and the second electrode comprises at least two sub electrode plates, all sub electrode plates in the same electrode are distributed in a mesh-like structure, i.e. at least one of the first electrode and the second electrode is provided with at least one grid, and all the grids are enclosed by the sub electrode plates at the periphery of the grids. According to the invention, the concentrated capacitance in the prior art is improved into scattered capacitance through the mesh-like electrodes, so that even if a touch screen is hung in the air, higher effective capacitance is ensured, so that the water-proof performance of the touch screen is improved, and simultaneously the electrodynamic suspension (EDS) resistance, anti-aging and other properties of a capacitive screen are enhanced.

Description

technical field [0001] The present invention relates to a device for converting touch information on a screen into an electrical signal reflecting the touch position or strength, in particular to a device for converting touch information into an electrical signal reflecting the touch position using a capacitive device as a medium . Background technique [0002] In the prior art, there are various implementation principles for touch screens, including resistive touch screens, capacitive touch screens, surface infrared touch screens, and the like. Among them, the capacitive touch screen is welcomed by the public because of its high light transmittance, wear resistance, resistance to environmental temperature and humidity changes, long life, and the ability to realize advanced and complex functions, such as multi-touch. The use of capacitance changes as a sensing principle has a long history. For a touchscreen to work effectively, a transparent capacitive sensing array is req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F2203/04112G06F3/044G06F3/0446
Inventor 莫良华李华张靖恺
Owner FOCALTECH SYST LTD
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