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US 2012/0268375 A1Published application
Mouse wheel assembly
AssigneePixart Imaging Inc.
InventorsChih Hung LU, Wei Chung WANG
Life of this patent
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Abstract
A mouse wheel assembly is provided according to the present invention. The mouse wheel assembly includes a member and an optical module. The member has a pattern formed thereon. The optical module is adapted to illuminate the pattern on the member, capture an image of the pattern as a result of the illumination and recognize a feature change of the image of the pattern to obtain the change direction and change speed of the member.
Claims10
A mouse wheel assembly, comprising:
- a belt having a transparent pattern formed thereon;
- a light source adapted to illuminate the transparent pattern on the belt;
- an image sensor positioned opposite to the light source across the belt, the image sensor being adapted to capture images of the transparent pattern as a result of the illumination;
- and
- a processing unit coupled to the image sensor, the processing unit being adapted to recognize a feature change of the images of the transparent pattern to obtain a movement direction and a movement speed of the belt.
2 more elements
The mouse wheel assembly as claimed in claim 2, further comprising:
- a lens adapted to direct light beams emitting from the light source.
Dependencies are inferred from the claim text.