Three-dimensional multi-point type touch screen based on pressure sensor

Abstract

The invention relates to a three-dimensional multi-point type touch screen based on a pressure sensor. The three-dimensional multi-point type touch screen based on the pressure sensor comprises a capacitive touch screen body and a capacitive touch screen control chip, wherein the back surface of the capacitive touch screen body is provided with a film pressure sensor; the film pressure sensor is connected with a main control chip via a pressure sensor interface chip; the main control chip is connected with the capacitive touch screen control chip; a touch pressure value detected by the film pressure sensor is transmitted to the main control chip via the pressure sensor interface chip; the touch point number and the position information for capacitive touch screen touch are transmitted to the main control chip via the capacitive touch screen control chip; and according to the input information of the pressure sensor interface chip and the capacitive touch screen control chip, the touch point number, the touch position and the corresponding touch pressure of the touch operation of the capacitive touch screen body can be obtained by the main control chip. The three-dimensional multi-point type touch screen based on the pressure sensor, which is disclosed by the invention, has a simple and compact structure and is safe and reliable, the touch detection precision is improved, and the three-dimensional multi-point type touch operation detection is realized.

Description

technical field [0001] The invention relates to a touch screen, especially a three-dimensional multi-point touch screen based on a pressure sensor. Specifically, a touch screen supporting three-dimensional multi-touch is realized through the organic combination of a pressure sensor and a multi-point capacitive touch screen, which belongs to human-computer interaction technical field. Background technique [0002] Due to its advantages of ease of operation, intuition and flexibility, touch screen has become the main means of human-computer interaction for personal mobile communication devices and comprehensive information terminals such as tablet computers, smart phones, and super notebook computers. Touch screens can be divided into four main types based on different touch principles: resistive touch screens, capacitive touch screens, infrared touch screens, and surface acoustic wave (SAW) touch screens. Among them, the capacitive touch screen has the function of multi-touc...

AI Technical Summary

Problems solved by technology

[0003] The capacitive touch screen has the disadvantage of being susceptible to environmental interference. It is difficult to accurately capture the touch behavior when wearing gloves and fingers with water or when it is used outdoors in rainy or snowy weather.

At the same time, the capacitive touch screen has the problem of touch misoperation when the finger is suspended above the touch screen due to its high sensitivity.

In addition, the capacitive touch screen only senses the touch position on the plane of the screen body (X, Y axis two-dimensional space), and it is difficult to support the touch parameter perception perpendicular to the screen body plane (Z axis)

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