Coordinate input apparatus

Details Coordinate input apparatus Coordinate input apparatus

2006-04-25

2006-04-25

Eisen, Alexander (Department: 2674)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S175000, C178S018010, C178S018030

Reexamination Certificate

active

07034809

ABSTRACT:
A coordinate input apparatus has a generally rectangular, flat coordinate input area and a set of at least first and second detectors for detecting arrival
on-arrival of light from an object to be detected present at any position in the coordinate input area. Coordinates indicating the position are output on the basis of outputs from the first and second detectors. The first and second detectors are placed at positions where coordinate resolution in the vicinity of a point, within the coordinate input area, nearest to the midpoint of a line segment connecting fiducial points of the two detectors is substantially equal to coordinate resolution in the vicinity of a point, within the coordinate input area, farthest from the midpoint.

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patent: 5-134803 (1993-06-01), None
patent: 6-274266 (1994-09-01), None

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