Directional input device with a light directing shaft

Details Directional input device with a light directing shaft Directional input device with a light directing shaft

2006-02-17

2009-06-09

Sohn, Seung C (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S208600, C341S031000, C356S152200, C700S085000, C345S161000, C345S166000

Reexamination Certificate

active

07544924

ABSTRACT:
A directional input device with a light directing shaft that avoids wear and tear caused by physical contact between a shaft and a sensor surface. A directional input device according to the present teachings includes a light emitter and a shaft having a surface that reflects light from the light emitter. A directional input device according to the present teachings further includes a set of light sensing elements that are positioned to detect a position of the shaft by sensing light reflected from the shaft.

REFERENCES:
patent: 4459022 (1984-07-01), Morey
patent: 4686361 (1987-08-01), Bard
patent: 5065146 (1991-11-01), Garrett
patent: 5530576 (1996-06-01), Jackson et al.
patent: 5943233 (1999-08-01), Ebina et al.
patent: 2002/0134925 (2002-09-01), Grenlund
patent: 2003/0193415 (2003-10-01), Fo et al.
patent: 2005/0162389 (2005-07-01), Obermeyer et al.
patent: 2005/0163509 (2005-07-01), Kobayashi et al.

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