发明名称 Capacitive keyboards.
摘要 <p>1. Capacitive keyboard of the matrix type, intended to provide a plurality of distinct orders when the various keys (1) of a keyboard are being depressed, and including a matricial arrangement of points (3) each being associated to a key of a keyboard, these points obeying the same repartition in rows and in columns than the keys, each of said points being itself composed of two conductive sections (31 , 32 ) which are insulated from each other and which can be capacitively coupled one with the other one by the simple depressing of the associated key, this depressing of the key having the effect of bringing simultaneously close to these sections a same conductive piece (2) also associated to said key, the two sections (31 , 32 ) being respectively placed against the two opposite sides of an insulating foil (4), in such positions that the projection of any one of said sections in the plane of the other section, along the direction perpendicular to this plane, is located next to this other section at a small distance from it, characterized in that said insulating foil (4) is made of one at least of the polymers and copolymeres of a substance selected from the group consisting of the mono-, di- and trifluoroolefins of the ethylene family, the thickness of said insulating foil being at most equal to 50 microns.</p>
申请公布号 EP0088030(A1) 申请公布日期 1983.09.07
申请号 EP19830400433 申请日期 1983.03.03
申请人 LEWINER, JACQUES;HENNION, CLAUDE 发明人 LEWINER, JACQUES
分类号 H03K17/98;(IPC1-7):03K17/975 主分类号 H03K17/98
代理机构 代理人
主权项
地址