Coded data generation or conversion – Bodily actuated code generator
Reexamination Certificate
2008-05-27
2008-05-27
Wong, Albert K. (Department: 2612)
Coded data generation or conversion
Bodily actuated code generator
C345S167000, C345S164000, C341S031000, C250S221000
Reexamination Certificate
active
07378990
ABSTRACT:
A laser locus ball apparatus for a wireless keyboard includes a base, a laser source generator, a locus ball, a light sensing element and a key cover. The base provides a lateral plate with a locating hole to locate the laser source generator and has another two opposite lateral plates with an engaging wedge at the bottom edge thereof to engage with the key cover. The top plate of the base has a supporting bore to receive the locus ball. A containing space is formed in the base to accommodate the optical sensing element. The laser source generator emits laser to the lower surface of the locus ball. The locus ball is movably received in and supported with the supporting bore such that the lower surface thereof extending downward from the supporting bore to reflect interference stripe figure during the lower surface of the locus ball receiving the laser. The light sensing element senses the laser interference stripe figure within every preset unit time. The key cover provides a circular hole at the top thereof for an upper surface of the locus ball extending outward the circular hole. Once the laser locus ball apparatus is in operation and the locus ball is moved, the moving direction and distance of the locus ball is figured out by the optical sensing element and position of the cursor of a screen is under control.
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patent: 2272763 (1993-11-01), None
Liu Yung-Lung
Yu Yuan-I
Sunrex Technology Corp.
Wong Albert K.
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