Optical mouse and image capture chip thereof

Details Optical mouse and image capture chip thereof Optical mouse and image capture chip thereof

2004-06-10

2008-03-11

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

C348S362000

Reexamination Certificate

active

07342570

ABSTRACT:
An optical mouse and image capture chip thereof. The image capture chip comprises an image sensor, a calculating logic circuit, and a refreshing logic circuit. The image sensor has a plurality of sensor units, capturing an image according to an exposure parameter to provide a plurality of exposure values. The calculating logic circuit provides an average exposure value by calculating the exposure values. If the exposure sample is within a first exposure range, the refreshing logic circuit maintains the exposure parameter and accordingly drives the image sensor to capture a next image. If the average exposure value is within a second exposure range, the refreshing logic circuit adjusts the exposure parameter with a first exposure extreme and accordingly drives the image sensor to capture a next image. If the average exposure value is within a third exposure range, the refreshing logic circuit adjusts the exposure parameter with a second exposure extreme and accordingly drives the image sensor to capture a next image.

REFERENCES:
patent: 6297513 (2001-10-01), Oliver et al.
patent: 2004/0160411 (2004-08-01), Yang
patent: 2005/0195314 (2005-09-01), Fossum et al.

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