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...

2005-05-31

2005-05-31

Nguyen, Jimmy H. (Department: 2673)

Computer graphics processing and selective visual display system

Display peripheral interface input device

C345S157000, C345S179000, C178S019010, C178S019050

Reexamination Certificate

active

06900791

ABSTRACT:
A light irradiated on a coordinate input screen from a pointing device is detected, and pieces of output information obtained as detection results for light at least at three known positions including first to third positions are stored. The coordinate values of the light formed on the coordinate input screen are calculated using at least two of the stored pieces of output information at the first to third positions.

REFERENCES:
patent: 5341155 (1994-08-01), Elrod et al.
patent: 5499098 (1996-03-01), Ogawa
patent: 6-274266 (1994-09-01), None
patent: 7-76902 (1995-10-01), None
patent: 11-219253 (1999-08-01), None

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