4 June 2001 Display applications for holographic optical elements
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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.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William J. Gambogi, William J. Gambogi, Mark L. Armstrong, Mark L. Armstrong, Babak Hamzavy, Babak Hamzavy, Michael L. Levin, Michael L. Levin, Steven R. Mackara, Steven R. Mackara, William J. Molteni, William J. Molteni, Kirk W. Steijn, Kirk W. Steijn, Sylvia H. Stevenson, Sylvia H. Stevenson, Thomas C. Felder, Thomas C. Felder, Gerald L. Heidt, Gerald L. Heidt, Douglas R. Miller, Douglas R. Miller, "Display applications for holographic optical elements", Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001); doi: 10.1117/12.429473; https://doi.org/10.1117/12.429473

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