Multi-point electric resistance touch screen

Abstract

The invention relates to a touch screen, in particular to a multi-point resistance touch screen which can recognize respective touch position of a plurality of points when the points are touched at the same time. The touch screen comprises a transparent medium supporting layer; the upper side of the transparent medium supporting layer is provided with a transparent medium touch layer; the upper surface of the transparent medium supporting layer is provided with a rectangle ITO conductive film; a separation area is arranged on the rectangle ITO conductive film; two ends of the rectangle ITO conductive film are plated by electrodes and led out by electrode lead-out wires; the lower surface of the transparent medium touch layer is provided with the rectangle ITO conductive film in a direction vertical to the rectangle ITO conductive film of the upper surface on the supporting layer; the separation areas are distributed in the rectangle ITO conductive film of the lower surface of the transparent medium touch layer; two ends of the rectangle ITO conductive film are plated by the electrodes and are led-out by the electrode lead-out wires. The touch screen has the beneficial effects that 1. precise positioning or coarse positioning of single-point touch can be realized; 2. touch positions of multi-points can be recognized when the points are touched at the same time; meanwhile, according to different applications, the positioning of multi-point coordinates both in coarse range and in fine range (pixels) can be realized; 3. the power dissipation is low, the touch material is not restricted, the positioning type is smart and the structure is simple.

Description

technical field [0001] The invention relates to a touch screen, in particular to a multi-point resistive touch screen capable of identifying respective touch positions when multiple points are touched simultaneously. Background technique [0002] There are three types of touch screens currently on the market: [0003] 1. Four-wire resistive touch screen. The four-wire resistive touch screen consists of two resistive layers, separated by insulating spacers. The resistive layer is a conductive film evenly evaporated on the surface of glass or plastic. One layer is on the edge of the horizontal direction. There is a bus, and the other layer has a bus on the edge of the vertical direction. These four buses are respectively drawn out through the electrodes, and are driven and controlled by the circuit. When the four-wire resistive screen is working, add 0V and V to the two buses on one of the working surfaces. REF The working voltage makes the working surface form a uniform vol...

AI Technical Summary

Problems solved by technology

The four-wire resistive touch screen can accurately locate the position of a single touch, but it cannot identify the touch position of each point when multiple points (more than two points) are touched at the same time

However, the structure and circuit implementation of the pressure multi-point touch screen are extremely complicated and the cost is relatively high.

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