Patent ID: 9638731
Date: 2017-05-02
CPC Classifications: G01R,G06F,H03K

Claim:
1. A capacitive touch keyboard, comprising: a shielding layer comprising a ground plane, wherein the shielding layer further comprises plural first key areas at an outer surface of the shielding layer; a one-dimensional sensor layer comprising plural sensing cells, wherein the one-dimensional sensor layer further comprises plural second key areas at an outer surface of the one-dimensional sensor layer, and the plural sensing cells correspond to the plural second key areas and the plural first key areas; an intermediate layer interposed between the ground plane of the shielding layer and the one-dimensional sensor layer so as to form a capacitor structure, wherein the shielding layer, the intermediate layer and the one-dimensional sensor layer are configured to have a clearance between the shielding layer and the one-dimensional sensor layer changeable in response to a pressing operation of a user on the plural first key areas or the plural second key areas; and a sensing circuit electrically connected to the plural sensing cells to probe a capacitance change.