Coordinate input device and its control method, and computer...

Details Coordinate input device and its control method, and computer... Coordinate input device and its control method, and computer...

2005-01-25

2005-01-25

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S175000, C345S166000, C345S157000

Reexamination Certificate

active

06847356

ABSTRACT:
A device has a projection type image display unit which has a projection lens and generates a coordinate input screen, and linear sensors for sensing an image of a beam spot, and computes a coordinate value corresponding to the beam spot on the basis of information obtained by the projection type image display unit and the output signals from the linear sensors. This beam spot is generated by irradiating the predetermined position on the coordinate input screen with light coming from a pointing tool, or corresponds to a light-emitting portion provided to the distal end of the pointing tool located near the coordinate input screen.

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patent: 05-224636 (1993-09-01), None
patent: 06-274266 (1994-09-01), None
patent: 07-076902 (1995-08-01), None

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