Sandwich-type piezoelectric touch screen

Abstract

The invention discloses a sandwich-type piezoelectric touch screen which comprises a substrate and an outer positioning frame for fixing the substrate. The reverse side of the substrate is sequentially provided with an upper flexible thin film, a sheet-type piezoelectric element and a lower flexible thin film; array-type thin film conductive circuits are arranged on the surfaces of the upper flexible thin film and the lower flexible thin film; an upper electrode and a lower electrode are respectively arranged on the upper and lower surfaces of the sheet-type piezoelectric element; and the piezoelectric element has high piezoelectric performance (particularly, the performance of currently common lead-containing piezoelectric ceramics is dozens of times higher than the performance of a piezoelectric thin film with the highest performance), however, the screen generates the small deformation by applying a small force to the screen so as to implement output of a large electric signal. The invention can well solve the problem of insufficient sensitivity of the piezoelectric touch screen. The sandwich-type piezoelectric touch screen disclosed by the invention not only has high sensitivity, but also has high stability and reliability. The piezoelectric touch screen has the characteristics of structural innovation, low manufacturing cost, excellent performance and the like.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a sandwich-type piezoelectric touch screen. Background technique [0002] With the development of information technology, human-computer interaction or object-machine interaction methods are not limited to traditional methods such as mouse, keyboard, and monitor. More convenient, fast, and intuitive ways are affecting our lives. As one of the most practical new human-computer interaction or object-machine interaction methods, the touch screen has developed rapidly in the past 20 years. "Foldable, Flexible deformable piezoelectric touch screen" (Application No.: 201110308151.X) patent, because the piezoelectric film used in the patent has low piezoelectric performance, so it needs to exert a large force on the screen, so that the screen can produce a large deformation. A small amount of electrical signal will be output, so the sensitivity of the touch screen will be problem...

AI Technical Summary

Problems solved by technology

More convenient, fast, and intuitive ways are affecting our lives. As one of the most practical new human-computer interaction or object-machine interaction methods, the touch screen has developed rapidly in the past 20 years. "Foldable, Flexible deformable piezoelectric touch screen" (Application No.: 201110308151.X) patent, because the piezoelectric film used in the patent has low piezoelectric performance, so it needs to exert a large force on the screen, so that the screen can produce a large deformation. Will output a small amount of electrical signal, so the sensitivity of the touch screen will be problematic

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