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:
Aug. 16, 2016
Filed:
Dec. 26, 2012
Evieo Technology (Shenzhen) Limited, Shenzhen, Guangdong, CN;
Qinglin Na, Shenzhen, CN;
Yan Huang, Shenzhen, CN;
Haohuang Mai, Shenzhen, CN;
Haixiang Wang, Shenzhen, CN;
PIQS TECHNOLOGY (SHENZHEN) LIMITED, Shenzhen, CN;
Abstract
An auto-focusing projection system includes a projection module, an infrared monitoring module (), an infrared source () provided on the projection module, and a focusing device for driving the first lens group () moving forward and backward. An IR light spot emitted from the infrared source falls within the monitoring scope of the infrared monitoring module, preferably inside the projected picture of the projection module or on the edge thereof, and after reflected back, it also can travel through the first lens group, and the splitting element in turn, and then be transmitted to the infrared monitoring module. Analyzing the IR light spot picture emitted from the infrared source which is collected by the infrared monitoring module, a control signal can be sent to a focusing motor to adjust the first lens group to an appropriate position, so as to realize auto-focusing.