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:
Dec. 11, 2001
Filed:
Apr. 09, 2001
Takeshi Matsui, Tokyo, JP;
Takuji Yoshida, Kanagawa, JP;
Shunichi Hashimoto, Kanagawa, JP;
Yoshinori Tanaka, Kanagawa, JP;
Osamu Akimoto, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A picture display method and apparatus in which a light source is lengthened in service life and optimum color reproduction is realized, while the light utilization efficiency is improved to reduce the power consumption and the size of the apparatus. The red, green and blue illuminating light beams radiated from the light-emitting diodes,R,,G and,R, are illuminated via relay lenses and field lenses on picture display light valves,R,,G and,B and spatially modulated in intensity so as to be synthesized by a synthesis prism,and so as to be projected to an enlarged scale on a screen,. The profile of the light radiating portions of the light-emitting diodes,R,,G and,B are set so as to be the same or similar to the profile of a picture display area of each of the picture display light valves,R,,G and,B in order that the profile of the light beam illuminated on the picture display area will be in keeping with the profile of the picture display area.