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:
Dec. 20, 2011
Filed:
Jan. 17, 2007
Shaoping Peng, Beijing, CN;
Yiqiang Yan, Beijing, CN;
Zifeng Hou, Beijing, CN;
BO Liu, Beijing, CN;
Beijing Lenovo Software Ltd., Beijing, CN;
Lenovo (Beijing) Limited, Beijing, CN;
Abstract
A projector for acquiring a coordinate of a bright spot includes a half transparent and half reflecting mirror (), an imaging device (), and a processing system (). The half transparent and half reflecting mirror () is provided on a light path between the light source () and the zooming system (). The imaging device () captures an external light ray reflected by the half transparent and half reflecting mirror (). The processing system () acquires the coordinate of the bright spot according to the image of the image of the bright spot captured by the imaging device.