Integrated panel piezoelectric keyboard and identification method of misoperation of same

Abstract

The invention discloses an integrated panel piezoelectric keyboard, comprising a piezoelectric electret film, an upper conductive electrode layer and a lower conductive electrode layer tightly attached to the two opposite side surfaces of the piezoelectric electret film, and an integrated panel, wherein the integrated panel includes a key area and a non-key area, the key area is provided with a plurality of keys, the upper conductive electrode layer comprises a plurality of upper key conductive electrodes corresponding to the plurality of keys and an upper misoperation conductive electrode corresponding to the non-key area, and the lower conductive electrode layer comprises a plurality of lower key conductive electrodes corresponding to the plurality of keys and a lower misoperation conductive electrode corresponding to the non-area area. According to the integrated panel piezoelectric keyboard, the key electrodes and the misoperation electrodes all output charge through different lines, the keyboard judges whether there is misoperation through the line of the received charge; the integrated panel piezoelectric keyboard is accurate in judgment, simple in structure, low in cost, and convenient to use in occasions where the keys are easy to pollute.

Description

technical field [0001] The invention relates to the technical field of keyboards, in particular to an integral panel piezoelectric keyboard and a method for identifying its misoperation. Background technique [0002] The integral panel keyboard refers to a new type of keyboard that is different from the traditional one with multiple independent mechanical keys. It does not need to slot the key area of ​​the panel, which ensures the integrity of the panel and can play a good role in waterproof, Dustproof, etc., and the appearance is more beautiful. [0003] Existing integral panel keyboards include integral membrane switch keyboards, integral capacitive touch keyboards and integral piezoelectric keyboards. The integral membrane switch keyboard uses the contact closure of the upper and lower circuit boards to realize the switch function. However, because the membrane keys require a large key force and displacement when pressing the keys, repeated displacement changes will cau...

AI Technical Summary

Problems solved by technology

When the integral piezoelectric keyboard uses PVDF piezoelectric film and its composite film, the raw material cost is relatively expensive and due to the piezoelectric charge coefficient d of the PVDF piezoelectric film and its composite film 33 Low, only 30pC / N, which makes its sensitivity low and greatly limits its application range; and because ceramic materials are rigid materials, when ceramic materials are used to make integral panel keyboards, each key area needs to be arranged separately. complex

[0006] The existing Chinese patent "CN202889319U" with the announcement number "An Integral Overlay Button" discloses the use of piezoelectric electret films to prepare integral buttons and keyboards. However, the buttons are simple to set. Outside the area, there is no corresponding identification circuit, which is easy to cause misoperation

Images