Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2007-10-30
2007-10-30
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S173000, C345S178000, C178S018010, C178S018030, C178S018050, C178S018060, C178S018070
Reexamination Certificate
active
10809246
ABSTRACT:
A touch pad for a data processing system includes a first film and an electrically conductive first thin film above the first film, a plurality of electrically non-conductive spacer dots above the first thin film, a second electrically conductive thin film above the plurality of spacer dots, and a second film above the second thin film. The density of spacer dots above the first thin film is non-uniform. In one implementation, the first film is a ceramic, the second film is a flexible polymer, and the first and second thin films are a metal-oxide compound. In one embodiment, the spacer dot density is in a first range over a first portion of the first film and in a second range over a second portion of the first film. The second portion of the first film may define a signature box suitable for receiving a user's signature.
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patent: 6459424 (2002-10-01), Resman
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Fay III Theodore D.
Hjerpe Richard
Piche Jason O.
Tran My-Chau T.
Yee Duke W.
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