Optical pointing system and method for controlling a...

Details Optical pointing system and method for controlling a... Optical pointing system and method for controlling a...

2007-08-14

2007-08-14

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C345S166000

Reexamination Certificate

active

10717959

ABSTRACT:
The present invention relates to an optical pointing system and a method for calculating a movement value thereof, comprising: an image sensor for detecting light reflected from a worktable surface to generate an image signal, a maximum search window variable circuit for inputting at least one of the image signal and a movement value to change a size of a maximum search window, and a movement value calculation circuit for calculating the movement value of the image signal using the maximum search window with the changed size. Therefore, an exact movement value can be found by changing at least one of the maximum search window and a sampling rate according to at least one of a quantity of light and a movement speed to calculate the movement value.

REFERENCES:
patent: 6429422 (2002-08-01), Bohn
patent: 6455840 (2002-09-01), Oliver et al.

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