Method and apparatus for calibrating an optical computer input s

Details Method and apparatus for calibrating an optical computer input s Method and apparatus for calibrating an optical computer input s

1990-11-09

1993-01-19

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340707, 356365, G09G 302

Patent

active

051810158

ABSTRACT:
A method and apparatus facilitates the alignment and light sensitivity adjustment of an optical computer input system, which includes a user generated light directed onto a screen bearing a computer generated image, to convey information to the computer interactively by the user, even in a darkened room. The system discriminates between the user generated image, and the computer generated image. Devices facilitate the proper alignment of the system with the screen, as well as proper light sensitivity adjustments.

REFERENCES:
patent: 3855096 (1975-05-01), Inuiya
patent: 4280135 (1981-07-01), Schlossberg
patent: 4576481 (1986-03-01), Hansen
patent: 4724480 (1988-02-01), Hecker et al.
patent: 4794430 (1988-12-01), Whittaker et al.
patent: 4808980 (1989-02-01), Drumm
patent: 4836671 (1989-06-01), Bantista
patent: 4846694 (1989-07-01), Erhardt

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