Shock absorption-based three-dimensional multi-point touch screen and control method thereof

Abstract

The invention discloses a shock absorption-based three-dimensional multi-point touch screen and a control method thereof. The shock absorption-based three-dimensional multi-point touch screen comprises a touch layer, a pressure sensor array, a touch perception sensor, a control unit and a touch screen shell, wherein the touch layer comprises a top surface and a bottom surface; the pressure sensor array and the touch perception sensor are connected to the bottom surface of the touch layer; the control unit is connected with the pressure sensor array and the touch perception sensor; the touch screen shell comprises a substrate and a periphery; each pressure sensor comprises a pressure sensing control unit, as well as an X-direction capacitor unit group and a Y-direction capacitor unit group which are separately connected with the pressure sensing control unit; each X-direction capacitor unit group and each Y-direction capacitor unit group both comprise capacitor unit modules; each capacitor unit module adopts a comb-shaped structure comprising two or more strip-shaped capacitor units; each strip-shaped capacitor unit comprises a driving electrode of an upper electrode plate and a sensing electrode of a lower electrode plate. The shock absorption-based three-dimensional multi-point touch screen has the advantages that through the adoption of the improved pressure sensor, a plurality of simultaneous touches can be sensed timely and accurately, and the pressure and track of each electric shock can be recorded accurately.

Description

technical field [0001] The invention belongs to the technical field of touch screens, and relates to a three-dimensional multi-point touch screen, in particular to a three-dimensional multi-point touch screen based on vibration absorption and a control method thereof. Background technique [0002] Capacitive tactile sensors have the advantages of simple structure, low cost, high sensitivity and good dynamic response, especially the adaptability to harsh conditions such as high temperature, radiation and strong vibration. However, the output of this type of sensor is generally nonlinear, and the inherent parasitic capacitance and distributed capacitance will affect the sensitivity and measurement accuracy of the sensor. Since the 1970s, with the development of integrated circuit technology, capacitive sensors packaged with miniature measuring instruments have appeared. This new type of sensor can greatly reduce the influence of distributed capacitance and overcome its inheren...

AI Technical Summary

Problems solved by technology

The pressure sensors all just collect the pressure in the vertical direction: for example, Chinese patent CN201110074892.6 adopts 10 film pressure sensors corresponding to the pressure distribution points of the soles of the feet; CN201010230489.3 adopts a matrix pressure sensor of 8 columns×10 rows; The 40 by 40 piezoresistor matrix used cannot perform three-dimensional force calculations

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