Coordinate input apparatus and control method and program...

Details Coordinate input apparatus and control method and program... Coordinate input apparatus and control method and program...

2007-10-16

2007-10-16

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018010

Reexamination Certificate

active

10901148

ABSTRACT:
A coordinate input apparatus includes a light-receiving unit arranged in a coordinate input region, a reflection unit arranged at the peripheral portion of the coordinate input region to reflect incident light, and a light-emitting unit which illuminates the coordinate input region with light. Angle information corresponding to a point which crosses a predetermined level in a light amount distribution obtained from the light-receiving unit is calculated. The coordinates of the pointed position are calculated on the basis of, of a plurality of pieces of calculated angle information, angle information corresponding to direct reflected light from the pointing means, the direct reflected light being generated by the light-emitting unit.

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