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:
Sep. 05, 1989
Filed:
Dec. 29, 1988
Thomas S McKechnie, Ossining, NY (US);
Jill F Goldenberg, Pelham Manor, NY (US);
Joshua D Eskin, New York, NY (US);
Jeffrey A Shimizu, Mt. Kisco, NY (US);
Ralph H Bradley, Jr, Knoxville, TN (US);
William F Guerinot, Knoxville, TN (US);
North American Philips Corporation, New York, NY (US);
Abstract
Display systems useful for projection video and television systems are provided to perform with high efficiency and good color rendition. In these systems, color may be provided, as one example, by various light valves, such as liquid crystal displays. Each of the liquid crystal displays are positioned at equal path distances from an illuminating subsystem, and have equal path distances from the light valves to a projection subsystem. This enables optimum illumination of each of the light valves. Various embodiments of arranging the light valves, as well as providing illumination are described.