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:
Apr. 24, 2001
Filed:
Jul. 16, 1999
Naoya Eguchi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides an image display apparatus comprising a light source, a coupling lens, an integrator and a light valve. If &thgr;,is the largest value that can be taken by the angle formed by light irradiating said light valve and the optical axis as viewed along the short edges of said light valve, &thgr;,is the largest value that can be taken by the angle formed by light irradiating said light valve and the optical axis as viewed along the long edges of said light valve, L,is the length of the short edges of said light valve, L,is the length of the long edge of said light valve and NA,is the effective numerical aperture of said coupling lens, then, the surface area of the light emitting region of said light source is not greater than (L,×&thgr;,/NA,)×(L,×&thgr;,/NA,). Such an image display apparatus is adapted to evenly and uniformly irradiate the light valve of the apparatus with rays of light emitted from the light source with an improved light irradiation efficiency.