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Method for improving surface acoustic wave touch screen performance

A surface acoustic wave and touch screen technology, which is applied in the field of improving the performance of surface acoustic wave touch screens, can solve problems such as limiting the application and promotion of surface acoustic wave screens, improving touch stability, and touch disconnection, so as to increase touch response time, effective touch detection, and improve The effect of signal strength

Active Publication Date: 2010-09-08
GENERALTOUCH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the screen body is enlarged through the method of physical partitioning of the screen body. This method of partitioning has the disadvantage of having a touch blind area between each area, and this blind area is often located in the main touch area such as the middle of the screen body, so this method is limited. Application of touch screen in some occasions
[0005] For conventional surface acoustic wave touch screens, due to the limited total energy of the surface acoustic wave output by the transmitting transducer and the attenuation of the transmission medium, the signal received by the receiving transducer is too weak and the noise is too large, so it is difficult to improve the stability of touch through signal processing , resulting in touch disconnection, random jumping and other phenomena
Thus limiting some applications and promotion of surface acoustic wave screens

Method used

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  • Method for improving surface acoustic wave touch screen performance
  • Method for improving surface acoustic wave touch screen performance
  • Method for improving surface acoustic wave touch screen performance

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for improving the performance of a surface acoustic wave touch screen. In the method, the frequency of the transmitting control signal of the transmitting circuit is adjusted to be 2.56MHZ-3.89MHZ, the reference resonance frequency of the transmitting transducer and the receiving transducer is located at 2.56MHZ-3.89MHZ, and the receiving circuit is resonant The frequency is between 2.56MHZ and 3.89MHZ, and the operating frequency of the transmitting and receiving stripe arrays is between 2.56MHZ and 3.89MHZ.

[0024] In the present invention, the transmitting circuit transmitting control signal frequency, transmitting transducer reference resonant frequency, receiving transducer reference resonant frequency, receiving circuit resonant frequency, transmitting fringe array and receiving fringe array have the same working frequency. The surface acoustic wave touch screen mainly includes a transmitting circuit, a receiving circuit, a transmitting transducer, a rece...

Embodiment 2

[0033] In the present invention, the frequency division and control of the control processing circuit and the transmission control circuit make the frequency of the transmission control signal of the transmission circuit be located at 2.56MHZ, and select the transmission transducer and the reception transducer with a reference resonance frequency of 2.56MHZ to make the resonance frequency of the reception circuit Located at 2.56MHZ, adjust the fringe density and fringe height of the emitting fringe array and receiving fringe array, so that the operating frequency of the emitting fringe array and receiving fringe array is at 2.56MHZ.

Embodiment 3

[0035] In the present invention, the frequency division and control of the control processing circuit and the transmission control circuit make the frequency of the transmission control signal of the transmission circuit be located at 3.89MHZ, and the transmission transducer and the reception transducer with a reference resonance frequency of 3.89MHZ are selected to make the resonance frequency of the reception circuit Located at 3.89MHZ, adjust the fringe density and fringe height of the transmitting fringe array and receiving fringe array, so that the operating frequency of the transmitting fringe array and receiving fringe array is at 3.89MHZ.

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Abstract

The invention discloses a method for improving the performance of a surface acoustic wave touch screen. In the method, the frequency of a transmit control signal of a transmitting circuit is adjusted to be 2.56 - 3.89MHZ; the base resonance frequency of a transmitting transducer and a receiving transducer is 2.56 - 3.89MHZ; the resonance frequency of a receiving circuit is 2.56 - 3.89MHZ; and theworking frequency of a transmitting stripe array and a receiving stripe array is adjusted to be 2.56 - 3.89MHZ. The surface acoustic wave touch screen adopting the invention has strong capacity of resisting disturbance and is stabler; the size of the screen body can be larger.

Description

Technical field [0001] The present invention relates to a surface acoustic wave touch screen technology, and in particular, to a method for improving the performance of a surface acoustic wave touch screen. Background technique [0002] Currently, touch screens mainly include surface acoustic wave, infrared, resistance, capacitance and other types. Surface acoustic wave touch screens have the characteristics of high resolution, short response time, good stability, good anti-riot properties, and good light transmittance; infrared touch screens have average resolution, long response time, average stability, good anti-riot properties, and good light transmittance. Good, easy to be interfered by light and other characteristics; Resistive touch screen has the characteristics of high resolution, short response time, good stability, poor light transmittance, poor anti-explosion property; Capacitive touch screen has high resolution, short response time, average stability and light t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/043
Inventor 黄世通李想张萍
Owner GENERALTOUCH TECH