Touch screen

Abstract

The invention provides a touch screen, which comprises a working layer, a detection layer, an insulating layer, a substrate and a touch layer. The touch screen is characterized in that: the detection layer is a transparent conductive film; a detection electrode is arranged on the detection layer; and a ribbon resistance wire is arranged on the working layer, extended along one side edge of the working layer, turned back at a certain interval when reaching an edge and repeatedly bent to reach the other side edge of the working layer, and the two endpoints of the ribbon resistance wire form two electrodes. The touch screen is further improved in a way that: the ribbon resistance wire forms a plurality of areas with different touch accuracy values due to interval differences. Compared with the conventional resistive touch screen, the touch screen provided by the invention can meet the requirements of the different touch areas in the touch screen on touch accuracy by regulating the distribution density of the ribbon resistance wire in the touch areas, and reduces the resistance value of the whole ribbon resistance wire and correspondingly reduces the requirements of driving voltages of hand-held consumer terminals because the density of the ribbon resistance wire in a part of the touch areas is relatively lower.

Description

technical field [0001] The invention relates to a touch screen, in particular to a resistive touch screen capable of supporting single-point or two-point input. Background technique [0002] Existing touch screens can generally be classified into several types according to their working principles: resistive, capacitive, infrared, surface acoustic wave, electromagnetic, and pressure sensing. In surface acoustic wave technology, ultrasonic waves are sent horizontally and vertically on the surface of the touch screen through a transducer. When the panel is touched, the acoustic wave energy at the contact point is absorbed, and the sensor detects the change of the acoustic wave to locate the contact point. In infrared technology, light beams are sent horizontally and vertically across the surface of the touch screen by light-emitting diodes. When the panel is touched, the light beam at the touch point is blocked, and the light detector detects this change to locate the touch po...

AI Technical Summary

Problems solved by technology

In this scheme, the two layers of conductive film are divided into several rectangular conductive strips, and the conductive strips on each layer of conductive film are parallel to each other and insulated, and multiple rows and columns are arranged in a matrix to form conductive areas at the intersections to correspond to Multiple touchable positions, but this solution has the following defects: 1. Only one point can be identified in each conductive area, and only one point can be identified when multiple contacts fall in the same conductive area; 2. Each rectangular conductive area Both ends of the strip need to be provided with electrodes, which are connected to the control circuit through leads. An increase in the number of conductive strips will increase the number of control circuit components, resulting in increased volume and increased manufacturing costs. Too few conductive strips will affect the resolution of the touch screen.

[0009] Although the scheme of using two types of touch screens to form the display screen has certain advantages, since the entire touch screen is composed of two parts, it increases the difficulty of generating and assembling, and also brings the complexity of calculation and processing

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