Three-dimensional multiple-point type touch screen based on thin film pressure sensors and triaxial accelerometer

Abstract

The invention provides a three-dimensional multiple-point type touch screen based on thin film pressure sensors and a triaxial accelerometer. The three-dimensional multiple-point type touch screen comprises a capacitive touch screen body, a plurality of thin film pressure sensors arranged on the back face of the capacitive touch screen body, a capacitive touch screen control chip, a pressure sensor interface circuit and a master control chip. The capacitive touch screen body is connected with the capacitive touch screen control chip, and the thin film pressure sensors are connected with the pressure sensor interface circuit. The capacitive touch screen control chip and the pressure sensor interface circuit are respectively connected with the master control chip. The master control chip is connected with a triaxial accelerated speed sensor, and the triaxial accelerated speed sensor is used for acquiring an accelerated speed value perpendicular to the surface of the capacitive touch screen body and transmitting the accelerated speed value to the master control chip. The three-dimensional multiple-point type touch screen can achieve the fact that the touch pressure perpendicular to the surface of the touch screen is accurately sensed when equipment is in different inclined postures and motion states, and therefore the actual touch pressure corresponding to multiple touch points is accurately obtained.

Description

technical field [0001] The invention relates to a touch screen, in particular to a three-dimensional multi-point touch screen based on a thin film pressure sensor and a three-axis accelerometer. 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-touch, the user experience is superior, and the price is decreasing day by day. It has become the main technology used in the touch interaction of small and medium-sized information terminals. [...

AI Technical Summary

Problems solved by technology

However, this invention patent application is more suitable for personal mobile communication devices and integrated information terminals placed at specific tilt angles such as horizontal or vertical, and in practical applications, these handheld devices are in different tilt postures and motion states during use, due to the touch screen body It has a certain quality, which leads to the problem that the touch pressure perception is not accurate enough

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