Single-layer self-capacitance touch screen for realizing multi-point touch identification and data processing method thereof

Abstract

The invention relates to a single-layer self-capacitance touch screen for realizing multi-point touch identification and a data processing method thereof. The touch screen comprises at least two mutually independent self-capacitance electrode assemblies. The self-capacitance electrode assemblies are positioned in the plane on the same layer and are fully distributed in a touch region of the integral touch screen without being overlapped. Each self-capacitance electrode assembly comprises at least one self-capacitance coupling electrode pair. Each self-capacitance coupling electrode pair comprises two electrode plates positioned in the same plane. The two electrode plates of each self-capacitance coupling electrode pair comprise respective linear segment shaped pole plate coupling edges and linear segment shaped pole plate bottom edges. Each pole plate coupling edge is at an included acute angle with the corresponding pole plate bottom edge. In the self-capacitance electrode assemblies, the center lines of the self-capacitance coupling electrode pairs are in parallel mutually and the center lines of any two self-capacitance coupling electrode pairs which respectively belong to different self-capacitance electrode assemblies are also in parallel mutually. According to the invention, the characteristic of simple process structure of the single-layer self-capacitance touch screen is sufficiently played and a multi-point touch function is realized at a low manufacturing cost as much as possible.

Description

[0001] This application is a divisional application with an application date of January 21, 2013, an application number of 201310021178.X, and an invention titled "Single-layer self-capacitance touch screen for realizing multi-touch recognition and its data processing method". technical field [0002] The invention relates to a touch screen for data input and a data processing method thereof, in particular to a touch screen based on the self-capacitance principle and a data processing method thereof. Background technique [0003] The common two-layer mutual-capacitance touch screen in the prior art can realize real multi-touch, but it needs two layers of electrode pads, and the electrode pads are mostly made of transparent conductive material Indium Tin Oxide, resulting in relatively high manufacturing cost. High, the indium tin oxide Indium Tin Oxide is referred to as ITO. In addition, most of the structures used in the prior art touch screens include glass Glass / glass Glas...

AI Technical Summary

Problems solved by technology

However, the self-capacitance touch screen adopting this kind of triangular complementary pattern can not realize multi-touch in some cases because the calculation method of touch point coordinate data adopts the touch change rate to calculate the coordinates in the horizontal direction, and uses the touch change center of gravity to calculate the coordinates in the vertical direction. control

For example, when multiple touch points occur on the same horizontal line, the coordinates of all detected touch points in the vertical direction are the same as the coordinates calculated by the center of gravity of the touch change, and the detected points cannot be distinguished by touch changes in the horizontal direction , so the horizontal coordinates cannot be calculated, so it is impossible to realize multi-touch on the same horizontal electrode

For the same reason, multi-touch cannot be realized on the same vertical line

Therefore, the above single-layer self-capacitance solution has obvious defects in the multi-touch function.

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