A method for solving the failure of capacitive screen and abnormal detection circuit of capacitive screen

Abstract

The invention discloses a method for solving the failure of a capacitive screen and an abnormal detection circuit of the capacitive screen. The method includes: setting an abnormal signal output circuit, receiving a pulse signal output by the capacitive screen to the abnormal signal output circuit; The abnormal signal output circuit delays and reverses the pulse signal and outputs it to the HOST CPU; the CPU receives the reversed signal, judges whether an abnormality occurs, and when an abnormality occurs, performs interrupt processing to restore the capacitive screen. The invention also provides a capacitive screen abnormality detection circuit. By adding some circuits on the touch screen or the main board, it is detected whether the capacitive screen is abnormal. If an abnormality occurs, the capacitive screen is restarted through the HOST CPU to restore normal operation, thereby occupying very little system resources and reducing the power consumption of the whole machine. The battery will basically not increase the burden, and the judgment and restart process is very short, the user basically does not feel it, and will not affect the user experience.

Description

technical field [0001] The present invention relates to the field of human-computer interaction technology, and in particular to a multi-touch capacitive screen. Specifically, it relates to a method for solving the failure of a capacitive screen and a circuit for detecting an abnormality of the capacitive screen. Background technique [0002] At present, mainstream smartphones and tablet computers are equipped with capacitive screens. Although capacitive screens have the advantages of high sensitivity, good permeability, accurate touch control, and no need to press hard, they have the disadvantage of easy color distortion, especially in humid and high temperature. In an environment where operation drift is prone to occur, in addition, the capacitive touch screen also has the defects of high cost and internal fragility and damage. [0003] In particular, it needs to be emphasized that when the capacitive touch screen is affected by the magnetic field, the temperature or humid...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method for solving the failure of the capacitive screen and an abnormal detection circuit of the capacitive screen, so as to solve the problem when the capacitive screen fails

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