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. 18, 2009
Filed:
Feb. 24, 2006
Naosato Taniguchi, Saitama, JP;
Shuichi Kobayashi, Yokohama, JP;
Akira Yamamoto, Yokohama, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A scanning type image display apparatus includes a synchronization control circuit that enables a scanning unit to synchronize the forward paths and backward paths. The scanning type image display apparatus comprises a light source, scanning unit for scanning the light beam in two dimensional directions, a scanning optical system for forming an image of the light source on a surface to be scanned, the last surface of the scanning optical system including a reflecting area that reflects an effective light beam for forming an image on the surface to be scanned and a light transmission portion provided outside the reflecting area, light beam detection unit for detecting a light beam transmitted through the light transmission portion, and a synchronization control circuit that controls light emitting timing of the light source based on a signal from the light beam detection means.