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...

Examples

Embodiment

[0041] Such as figure 1 As shown, the present invention provides a touch screen system based on surface acoustic wave technology, including a substrate 1 and a controller 3 for propagating surface acoustic waves. The substrate 1 is usually made of glass, but in other applications, the substrate 1 can be is any material capable of transmitting surface acoustic waves;

[0042] Such as figure 1 with figure 2 As shown, the front side of the substrate 1 is divided into a boundary area 101 and a middle touch area 102, and there is a smooth round edge 103 between the outer edge of the boundary area 101 and the bottom surface of the substrate 1; Transducer array 2; the transmitting transducer array 2 emits sound waves outward, transmits along the smooth round edge 103 of the substrate 1, propagates to the front of the substrate 1 through the smooth round edge 103 of the substrate 1, and passes through the other side of the substrate 1 After the corresponding smooth round edge 103 ...

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...

Examples

Embodiment

[0041] Such as figure 1 As shown, the present invention provides a touch screen system based on surface acoustic wave technology, including a substrate 1 and a controller 3 for propagating surface acoustic waves. The substrate 1 is usually made of glass, but in other applications, the substrate 1 can be is any material capable of transmitting surface acoustic waves;

[0042] Such as figure 1 with figure 2 As shown, the front side of the substrate 1 is divided into a boundary area 101 and a middle touch area 102, and there is a smooth round edge 103 between the outer edge of the boundary area 101 and the bottom surface of the substrate 1; Transducer array 2; the transmitting transducer array 2 emits sound waves outward, transmits along the smooth round edge 103 of the substrate 1, propagates to the front of the substrate 1 through the smooth round edge 103 of the substrate 1, and passes through the other side of the substrate 1 After the corresponding smooth round edge 103 ...

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