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:
Jun. 15, 2010
Filed:
Dec. 20, 2005
Brett A. Spurlock, Los Altos, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Steven Sanders, Belmont, CA (US);
Clinton B. Carlisle, Palo Alto, CA (US);
Brett A. Spurlock, Los Altos, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Steven Sanders, Belmont, CA (US);
Clinton B. Carlisle, Palo Alto, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
One embodiment relates to a laser positioning device for sensing relative movement between a data input device and a surface by determining displacement of image features in a succession of images of the surface. The device forms a single integrated package, which includes a planar substrate and a transparent encapsulant that also embodies a collimating lens. Both a coherent light source and a sensor array and associated circuitry are configured on the planar substrate. Another embodiment relates to a method of sensing relative movement between a data input device and a surface. Coherent light is emitted from a laser and collimated so as to form a collimated illumination beam with a predetermined diameter, D, and a substantially uniform phase front. A speckle pattern is generated by impingement of the collimated illumination beam on the surface and detected by a sensor array. Other embodiments are also disclosed.