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:
Jun. 10, 2003
Filed:
Dec. 28, 2000
Applicant:
Inventor:
Katsuaki Tsurushima, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/100 ; G02B 2/608 ; H04N 5/65 ;
U.S. Cl.
CPC ...
G03B 2/100 ; G02B 2/608 ; H04N 5/65 ;
Abstract
An image projection method for projecting laser beams and an image projector that projects laser beams are adapted to shut down the laser beams instantaneously when an obstacle intruding into the projection area of the laser beams is detected. A detection wave is projected onto a display screen along with the laser beams for displaying an image. The reflection wave of the detection wave reflected from the display screen is detected so as to find out whether the obstacle, if any, is intruding into the projection area of the laser beams.