Intermittent operating type pointing device

Details Intermittent operating type pointing device Intermittent operating type pointing device

2005-01-25

2005-01-25

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231160, C250S221000, C345S157000, C345S165000

Reexamination Certificate

active

06847031

ABSTRACT:
In detecting units for detecting the rotating operation of a ball, respective photoemitters serving as light sources are intermittently driven to emit light and respective photodetectors receive the light. A control unit recognizes a moving speed in the X-axial direction and that in the Y-axial direction from detection signals obtained by the detecting units. In the control operation of the control unit, when an increase in operating speed is detected, a light emitting period of each of the photoemitters is reduced. When a decrease in operating speed is detected, the light emitting period of each photoemitter is extended.

REFERENCES:
patent: 4704523 (1987-11-01), Uchida
patent: 5027109 (1991-06-01), Donovan et al.
patent: 5252968 (1993-10-01), Donovan
patent: 6-250784 (1994-09-01), None

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