Capacitance detection system and method

Abstract

The invention discloses a capacitance detection system and method. The system comprises a capacitance sensor and a detection unit, the capacitance sensor is used for generating a first induction capacitance value and a second induction capacitance value when receiving the operation instruction. The detection unit is used for detecting a first induction capacitance value and a second induction capacitance value, calculating the first induction capacitance value and the first fixed capacitance value obtaining a first capacitance variation, calculating a second induction capacitance value and a second fixed capacitance value to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type. By applying the system provided by the invention, the induction capacitance value of the capacitive sensor is detected, the induction capacitance value and the fixed capacitance value are calculated to obtain the calculated value, and the operation type of the operation instruction is determined according to the calculated value, so that the misjudgment on the touch screen is avoided, and the man-machine interaction experience of the touch screen is improved.

Description

technical field [0001] The invention relates to the detection field, in particular to a capacitance detection system and method. Background technique [0002] In recent years, the touch screen industry has developed rapidly, and related products have become popular in the market. As a kind of input device, the touch screen allows users to touch and control the displayed objects when using it, which makes human-computer interaction easier. , intuitive and user-friendly. Touch screens are divided into capacitive touch screens and resistive touch screens. Capacitive touch screens are mainly applied to the capacitance detection technology of capacitive sensors. The current capacitance detection technology is divided into self-capacitance detection and mutual capacitance detection. [0003] The inventors have found that when the capacitive sensor in the existing touch screen is working, no matter whether it is self-capacitance detection or mutual capacitance detection, it can on...

AI Technical Summary

Problems solved by technology

[0003] The inventor found that when the capacitive sensor in the existing touch screen is working, no matter whether it is self-capacitance detection or mutual capacitance detection, it can only recognize the touch of the operator, and cannot distinguish whether the operator is a conductor or a non-conductor, and whether it is Whether the operating object is approaching, normal touch or hard touch, forming a misjudgment of the touch screen, making the user experience poor

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