Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1997-07-22
1999-11-16
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345179, G09G 500
Patent
active
059866462
ABSTRACT:
The present invention is related to a method and apparatus for locationing a instrument of tablet, wherein a very simple equation is used to locate a instrument, for example, a stylus pen. The stylus pen location on the a sense line grid which formed by a set of spaced conductors is converted to a digitized number and can be reported to the host computer for controlling the screen cursor or making a sketch drawing.
REFERENCES:
patent: 4210775 (1980-07-01), Rodgers et al.
patent: 4734546 (1988-03-01), Landmeier
patent: 4831216 (1989-05-01), Landmeier
patent: 5134253 (1992-07-01), Doubrava
patent: 5693914 (1997-12-01), Ogawa
patent: 5768616 (1995-12-01), Teterwak
Chen Chien-Hung
Hsu Che-Wei
Hsu Jung-Chih
Ace Cad Enterprise Co., Ltd.
Hjerpe Richard A.
Laneau Ronald
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