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:
Aug. 05, 2003
Filed:
Feb. 05, 2002
Saburo Sugawara, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A projection-type image displaying device includes liquid crystal elements for modulating light rays having wavelength regions different from each other, a color combining optical element for combining the light rays modulated by the liquid crystal display elements, and a projection type optical system for projecting light rays combined by the color combining optical element to display an image. Polarizing elements are disposed on an incidence side and an exit side of the liquid crystal display elements. Optically anisotropic elements for correcting the optical anisotropy of each of the liquid crystal elements are disposed between the polarizing elements. An air-reduced distance Linp between an entrance pupil of the projection optical system and display surfaces of the liquid crystal display element and diagonal length Ldisp across corners of the display surface of the liquid crystal display elements meet the predetermined condition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile