Optical trackball
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 25, 2006
Issued Date -
N/A
app pub date -
Nov 2, 2001
filing date -
Nov 2, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical trackball is disclosed that is easy to operate without been worried about the contamination on the contacting shifts of encoders inside the trackball. When a distal motion from a user to rotate an operating ball having an uneven surface on the trackball, an image-detecting module will detect the varying of the reflected image from an illuminated portion of the uneven surface, causing the correspondingly moving of the cursor on the computer display.
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