Self-capacitance touch screen with one-dimensional electrodes and coordinate data processing method thereof

Abstract

The invention discloses a self-capacitance touch screen with one-dimensional electrodes and a coordinate data processing method thereof. The self-capacitance touch screen comprises trapezoidal electrodes, wherein any two adjacent trapezoidal electrodes are arranged in the way that the upper base of one trapezoidal electrode and the lower base of the other trapezoidal electrode are positioned in one straight line and the lower base of the first trapezoidal electrode and the upper base of the other trapezoidal electrode are positioned in another straight line, so that all the trapezoidal electrodes are arranged in a touch plane of the touch screen in an engagement way. The self-capacitance touch screen is only provided with the electrodes in one dimension, a touch position can be accurately positioned from two dimensions, an intersecting part does not exist between every two electrodes and an insulating material is not needed, so that the process difficulty is reduced and the cost is saved. The coordinate data processing method of the invention converts data detected by the one-dimensional electrodes into two-dimensional coordinate data and simplifies the data processing cost.

Description

technical field [0001] The present invention relates to an input device that converts a touch action into an available electrical signal, in particular to an input device that detects capacitance changes caused by a touch action, that is, a capacitive touch screen, especially a self-capacitance touch screen. Background technique [0002] Prior art self-capacitive touch screens, such as Figure 7 As shown, it includes electrodes 10' and equipotential electrodes 20' arranged horizontally and vertically, respectively. The electrodes 10' are all electrically connected to the data processing module 30', and the data processing module 30' is used to detect changes in the self-capacitance array formed between the electrodes 10' and the equipotential electrodes 20', thereby forming a touch position center coordinate data. The equipotential electrodes 20' are directly grounded or electrically connected to a DC source, so that the electrode plates are in an equipotential state. In t...

AI Technical Summary

Problems solved by technology

In the prior art self-capacitance touch screen structure, the horizontal electrode 10' and the vertical electrode 10' are usually orthogonal and in the same plane, forming self-capacitance in the horizontal and vertical dimensions respectively, and the intersection of the vertical electrode 10' and the horizontal electrode 10' It must be isolated with insulating materials, the process is quite complicated, and the process difficulty and cost are very high

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