Scanning system for optical coordinate input device with scan in

Details Scanning system for optical coordinate input device with scan in Scanning system for optical coordinate input device with scan in

1986-11-10

1988-08-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340365P, 2502221, G06F 3033

Patent

active

047615508

ABSTRACT:
A scanning system for an optical type coordinate input device comprises a plurality of light emitting elements and photoreceiving elements opposed to each other and a coordinate detection section for successively scanning a plurality of light emitting elements, wherein the light emitting elements in coordinate detection section are scanned while disposing a predetermined scanning interruption period. Since the temperature rise in the casing containing light emitting elements and like other elements can be reduced, erroneous operation of the device can be avoided, and element life can be increased.

REFERENCES:
patent: 3764813 (1973-10-01), Clement et al.
patent: 3860754 (1975-01-01), Johnson et al.
patent: 4029957 (1977-06-01), Betz et al.
patent: 4247767 (1981-01-01), O'Brian et al.

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