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:
May. 20, 2014
Filed:
Jun. 28, 2007
Hai Ming, Hefei, CN;
Wei Huang, Hefei, CN;
Jianping Xie, Hefei, CN;
Huaqiao Gui, Hefei, CN;
Tianpeng Zhao, Heifei, CN;
Jun Xu, Hefei, CN;
Yuan Kong, Kirkland, WA (US);
Hai Ming, Hefei, CN;
Wei Huang, Hefei, CN;
Jianping Xie, Hefei, CN;
Huaqiao Gui, Hefei, CN;
Tianpeng Zhao, Heifei, CN;
Jun Xu, Hefei, CN;
Yuan Kong, Kirkland, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A computer input device includes a light source assembly forming an incident light beam that strikes an area on a surface beneath the input device with large incident angle. A light sensing assembly in the input device is positioned to receive scattered light and includes a band-pass filter. A barrier is located directly above the area where the light beam is incident on the top surface to prevent light from traveling directly from the light source assembly to the light sensing assembly.