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:
Nov. 15, 2011
Filed:
Apr. 15, 2009
Hiroshi Nishigaki, Daito, JP;
Atsuya Hirano, Daito, JP;
Ken Nishioka, Daito, JP;
Atsuhiko Chikaoka, Daito, JP;
Hiroshi Nishigaki, Daito, JP;
Atsuya Hirano, Daito, JP;
Ken Nishioka, Daito, JP;
Atsuhiko Chikaoka, Daito, JP;
Funai Electric Co., Ltd., Daito-shi, JP;
Abstract
Disclosed in a laser projector to display an image by projecting a laser beam from a laser light source to a projection screen including an electromagnetic driven scan mirror to scan the laser beam from the laser light source, a detection unit to detect a back EMF which is generated by a drive of the electromagnetic driven scan mirror at a time of start-up of the laser projector, a first determination unit to determine whether a value of the back EMF which is detected by the detection unit exceeded a predetermined threshold or not and a light source control unit to start a lighting of the laser light source when the value of the back EMF is determined as exceeding the predetermined threshold by the determination unit.