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Proceedings Paper

Display applications for holographic optical elements
Author(s): William J. Gambogi Jr.; Mark L. Armstrong; Babak Hamzavy; Michael L. Levin; Steven R. Mackara; William J. Molteni Jr.; Kirk W. Steijn; Sylvia H. Stevenson; Thomas C. Felder; Gerald L. Heidt; Douglas R. Miller
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Paper Abstract

In the last several years, holographic elements have been introduced into a wide array of display applications. Holographic Reflectors are incorporated with liquid crystal displays to shift optimum viewing angle away form specular glare and raise brightness by concentrating light at a convenient viewing angle. Reflectors can be produced in blue, green, gold, red, or white colors. Denso GlassVision projection screens incorporate transmission holograms to efficiently direct projected light to the viewer in a screen that reverts to clear glass When the projection image is turned off. JVC has introduce da large-screen HDTV that uses a holographic color filter to separate blue, green, and red light from the illumination beam, and direct the sorted colors to the appropriate color pixel, raising brightness with a passive component. Most recently, HOE prototypes have been produced to improve the efficiency of portable liquid crystal color display. Front diffuser are affixed to the face of reflective color LCDs and direct output light from the LCD to the viewer at a convenient viewing angle in a concentrated view cone. Reflective Colors Filters are pixelated diffuse reflectors internal to the LCD structure and aligned to the LCD matrix. These reflective filters provide higher brightness, larger color gamut, and better color saturation including a holographic grating are under development to provide wider view angle in direct-view LCDs.

Paper Details

Date Published: 4 June 2001
PDF: 7 pages
Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001);
Show Author Affiliations
William J. Gambogi Jr., DuPont Holographics (United States)
Mark L. Armstrong, DuPont Holographics (United States)
Babak Hamzavy, DuPont Holographics (United States)
Michael L. Levin, DuPont Holographics (United States)
Steven R. Mackara, DuPont Holographics (United States)
William J. Molteni Jr., DuPont Holographics (United States)
Kirk W. Steijn, DuPont Holographics (United States)
Sylvia H. Stevenson, DuPont Holographics (United States)
Thomas C. Felder, DuPont Holographics (United States)
Gerald L. Heidt, Krystal Holographics International, Inc. (United States)
Douglas R. Miller, Krystal Holographics International, Inc. (United States)

Published in SPIE Proceedings Vol. 4296:
Practical Holography XV and Holographic Materials VII
Stephen A. Benton; Sylvia H. Stevenson; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

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