04864390 is referenced by 129 patents and cites 11 patents.

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.

Title
Display system with equal path lengths
Application Number
899469
Publication Number
4864390
Application Date
December 29, 1988
Publication Date
September 5, 1989
Inventor
William F Guerinot
Knoxville
TN, US
Ralph H Bradley Jr
Knoxville
TN, US
Jeffrey A Shimizu
Mt. Kisco
NY, US
Joshua D Eskin
New York
NY, US
Jill F Goldenberg
Pelham Manor
NY, US
Thomas S McKechnie
Ossining
NY, US
Agent
Paul R Miller
Assignee
North American Philips Corporation
NY, US
IPC
H04N 9/31
H04N 9/30
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