Light projection method and apparatus for an optical mouse

Details Light projection method and apparatus for an optical mouse Light projection method and apparatus for an optical mouse

2006-07-25

2006-07-25

Epps, Goergia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C345S166000

Reexamination Certificate

active

07081612

ABSTRACT:
A light projection method and apparatus for an optical mouse is provided. The light projection method and apparatus for an optical mouse comprises: provides a light projection apparatus and projects a light into the light projection apparatus to form a first light beam and a second light beam. The first light beam is vertically projected to a detection area of an image detection surface and the second light beam is slantwise projected to the detection area of the image detection surface. The first light beam allows the image detection unit of the optical mouse to exactly detect the image on the detection area. The second light beam makes the contrast between the concave and the convex of the detection area become more obvious and the ability of the image detection unit of the optical mouse to detect and identify the on the detection surface is effectively enhanced.

REFERENCES:
patent: 6717734 (2004-04-01), Fujimoto

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