The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Nov. 28, 2005
Weng Fei Wong, Penang, MY;
Chee Foo Lum, Penang, MY;
Siang Leong Foo, Penang, MY;
Song Wah Ooi, Penang, MY;
Keen Hun Leong, Penang, MY;
Yik Foong Soo, Penang, MY;
Sai Hong Hung, Penang, MY;
Gin Ghee Tan, Penang, MY;
Weng Fei Wong, Penang, MY;
Chee Foo Lum, Penang, MY;
Siang Leong Foo, Penang, MY;
Song Wah Ooi, Penang, MY;
Keen Hun Leong, Penang, MY;
Yik Foong Soo, Penang, MY;
Sai Hong Hung, Penang, MY;
Gin Ghee Tan, Penang, MY;
Avago Technologies ECBUIP Pte Ltd, Singapore, SG;
Abstract
An optical encoder includes an optical encoder pattern of alternating light elements and dark elements, and an optical unit, including an optical emitter providing light to the encoder pattern, and an optical sensor including a photo-detector receiving the light from the optical encoder pattern and in response thereto outputting a sinusoidal signal indicating relative movement between the optical sensor and the encoder pattern. In one embodiment, the photo-detector has a diamond shape, a modified-diamond shape, or an hourglass shape. In another embodiment, at least one of the light elements and the dark elements of the optical encoder pattern has a diamond shape, a modified-diamond shape, or an hourglass shape.