Touch screen system based on surface acoustic wave technique

Abstract

The invention discloses a touch screen system based on a surface acoustic wave technique. The system comprises a base plate and a controller, wherein the front surface of the base plate can be divided into a boundary area and a middle touch area, and a smooth round rim is arranged between the outer brim of the boundary area and the bottom surface of the base plate; the back of the base plate is provided with an energy transducer array which comprises a transmitting energy transducer array and a receiving energy transducer array; the transmitting energy transducer array emits an acoustic wave outwards, the acoustic wave passing along the smooth round rim of the base plate is transmitted by the smooth round rim of the base plate to the front of the base plate, then transmitted by the other corresponding smooth round rim of the base plate and received by the receiving energy transducer array arranged on the back surface of the base plate; the boundary area is provided with an emitting stripe array used for reflecting surface acoustic waves transmitted along one brim of the surface of the base plate; a controller is connected to the transmitting energy transducer array and the receiving energy transducer array through signal lines separately, and used for controlling the function of the transmitting energy transducer array and the receiving energy transducer array, processing received signals through a built-in program and then transmitting the signals to a computer through communication lines.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a touch screen system based on surface acoustic wave technology. Background technique [0002] A surface acoustic wave is a mechanical wave that propagates along the surface of a medium. This kind of touch screen is composed of a substrate (surface acoustic wave propagation medium), an acoustic wave transducer, a reflector, and an acoustic wave receiving transducer. The acoustic wave transducer can send a high-frequency sound wave across the surface of the substrate. When the finger touches the screen When , the sound wave on the contact is blocked, thus determining the coordinate position. [0003] The ordinary surface acoustic wave touch screen is composed of a screen body, a transmitting transducer, a receiving transducer, an array of reflective elements and a signal line. In order to locate the touch coordinates, usually the reflective element array and the transducer...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the shortcomings of the existing technical solutions, the present invention provides an adjustable four-corner ladder structure for indoor construction, which not only solves the problem that ordinary ladders need to rely on walls or other fixed facilities to be used, but also greatly increases the usability of the ladder. , increase construction efficiency, provide greater convenience for construction, facilitate transportation and carrying, and facilitate installation and use, and can effectively solve the problems raised by the background technology

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