Wireless input system for computer using elevated four-division

Details Wireless input system for computer using elevated four-division Wireless input system for computer using elevated four-division

1995-12-08

1996-12-17

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250221, H01J 4014

Patent

active

055856195

ABSTRACT:
A wireless input system for a computer includes a pen-type input device and an input device body. The pen-type input device comprises a light emitting element for emitting a pulse of light. The input device body comprises at least one optical system unit including a light receiving element for receiving the pulse of light emitted from the light emitting element of the pen-type input device and a circuit for calculating the outputs from the light receiving element to obtain the position abscissa of the pen-type input device.

REFERENCES:
patent: 3723013 (1973-03-01), Stirland et al.
patent: 5001557 (1991-03-01), Begle
patent: 5025516 (1991-06-01), Wilson
patent: 5027115 (1991-06-01), Sato et al.
patent: 5227622 (1993-07-01), Suzuki

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