Optical alignment method for pointing devices

Details Optical alignment method for pointing devices Optical alignment method for pointing devices

1997-02-13

1999-09-07

Hofsass, Jeffery A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

345158, 235462, 250221, 349 62, 349 64, 359454, G09G 500

Patent

active

059494026

ABSTRACT:
This invention provides an optical pointing device, such as those used to control devices such as televisions, VCRs, video games and computers, which have improved accuracy and lower sensitivity to detrimental effects, such as noise and user hand unsteadiness, than prior art devices. Such pointing devices emit light beams, such as infrared light, which when received by a receiver are used to position cursors or other symbolic shapes, such as sliding volume controls. An advantage of the pointing device of the invention is that light emitting diodes of conventional manufacture, known to have poor optical precision and hence variable angular emission profiles, may nevertheless be used in the pointing device of the invention.

REFERENCES:
patent: 4379233 (1983-04-01), Rosenthal
patent: 5297225 (1994-03-01), Snow et al.
patent: 5315418 (1994-05-01), Sprague et al.
patent: 5317140 (1994-05-01), Dunthorn
patent: 5550656 (1996-08-01), Sprague et al.
patent: 5756981 (1998-05-01), Roustaei

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