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:
Mar. 15, 2011
Filed:
Jul. 12, 2006
Yong Gao, Shanghai, CN;
Jian Liu, Shanghai, CN;
Apexone Microelectronics Ltd., Shanghai, CN;
Abstract
An optical motion tracking device () includes a photo detector array () comprised of highly sensitive photo sensors coupled to a computational circuit () inside a casing (). The photo detector array () detects optical features of a surface () using ambient light reflected from or propagated through the surface () and transmitted into the casing through an aperture (). Protrusions () on the bottom () lifts the device () from the surface () and allow the ambient light to illuminate the surface (). A nontransparent sidewall () encloses a light path from the aperture () to the photo detector array () to reduce light interference. A reflective band () near the aperture () to increases the illumination of the surface (). The computational circuit () calculates the correlation between the images from the photo detector array () to track the motion of the device ().