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:
Oct. 21, 2003
Filed:
Aug. 10, 1999
Applicant:
Inventors:
Naoki Mazda, Chigasaki, JP;
Ken Itou, Yamato, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 3/22 ; H04N 3/26 ;
U.S. Cl.
CPC ...
H04N 3/22 ; H04N 3/26 ;
Abstract
When an anomaly occurred in an optical system or light sources of a rear projection TV in which laser beams are employed as a light source, the anomaly is detected by sensors, the detected anomaly is transmitted to a microcomputer, and according to a signal from the microcomputer a laser light source control portion controls the laser beams from the laser light sources so as to stop or decrease generation of the laser beams. Thereby, danger is prevented in advance from being afflicted on a viewer.