Piezoelectric ceramic key

Abstract

The invention discloses a piezoelectric ceramic key which comprises a key layer and a base, wherein an amplifying circuit layer is arranged on the lower surface of the key layer; the key layer consists of a positive electrode piezoelectric ceramic piece and a negative electrode piezoelectric ceramic piece on two layers as well as a metal membrane; the metal membrane is arranged between the two layers of piezoelectric ceramic pieces; two lead wires are respectively led out of the positive electrode piezoelectric ceramic piece and the metal membrane to be connected with the amplifying circuit layer; the amplifying circuit layer is connected with an external device; the capacitances of the piezoelectric ceramic pieces are changed when the piezoelectric ceramic key is lightly touched, thereby forming a condition which permits an oscillating pulse and realizing the function of signal transmission; in addition, an electric energy which is converted from a mechanical energy is collected and converted into a backlight which is required by the key when the piezoelectric ceramic key is lightly touched, so that the user can see the position of the key by the backlight easily and clearly in the blurry night even when the gloom light is emitted by the key, thereby avoiding the phenomenon of pressing by mistake.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramics, in particular to a piezoelectric ceramic button. Background technique [0002] Piezoelectric ceramics have occupied a considerable proportion in the field of electronic materials and have been widely used in various industries. In recent years, all countries are actively researching and developing new piezoelectric functional ceramics. Most of the research focuses on discovering new effects from old materials, developing new applications, and starting from controlling the organization and structure of materials to find new piezoelectric materials. What deserves special attention is that with the development of material technology and technology, the application research on piezoelectric materials is very active in the world. [0003] Piezoelectric ceramics are polycrystalline materials with an electric domain structure. When subjected to mechanical stress or a vibration signal is...

AI Technical Summary

Problems solved by technology

[0004] Existing piezoelectric buttons all directly use the electric energy generated by the positive piezoelectric effect of piezoelectric ceramics to directly convert the electric energy into signal output and use or store electric energy at the same time, which causes a great waste of energy utilization, and the energy collected while outputting signals Or the remaining energy output is very weak, and basically cannot meet the collection or utilization, and it has been consumed by other loss methods

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