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. 04, 2002
Filed:
Mar. 08, 2000
Ryusaku Takahashi, Kanagawa-ken, JP;
Shintaro Nakagaki, Kanagawa-ken, JP;
Tsutou Asakura, Kanagawa-ken, JP;
Fujiko Koyama, Kanagawa-ken, JP;
Victor Company of Japan, Limited, Kanagawa-ken, JP;
Abstract
A projection display apparatus ( ) is formed by a light source ( ) radiating white light w, a collimator lens ( ) that converts condensed light flux from the light source ( ) to collimated light flux, a cold mirror ( ) for eliminating unwanted infrared light included in the white light w, an integrator that makes the intensity distribution of the illumination light on an object to be illuminated uniform, a reflective mirror ( ) that reflects light flux from the integrator ( ) at a prescribed angle, a polarizer ( ) that polarizes separated light of each wavelength band, a spatial light modulation section ( ), a coupling prism ( ), and a projection lens ( ).