Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-06-28
1992-11-03
Howell, Janice A.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 40, 359 49, G02F 11335
Patent
active
051610426
ABSTRACT:
A color liquid crystal display device is provided with a light protection system for rendering a plurality of beams in mutually different wavelength ranges incident upon a common liquid crystal display element from mutually different directions. The liquid crystal display element includes a liquid crystal driving device for light modulating the respective beams transmitting therethrough at mutually different angles. Further, on the surface of the liquid crystal display element upon which the beams are incident, an optical system is provided for focusing the respective beams of different wavelength ranges from different angles and for converging light beams of similar wavelength ranges for transmission through the liquid crystal display element so that combined color images can be subsequently formed on a display screen. Moreover, with the use of a micro-lens array, when transmitting through the micro-lens array in accordance with angles of incidence, the beams incident upon the liquid crystal display element are distributively projected upon liquid crystal portions to which corresponding color signals are applied.
REFERENCES:
patent: 4686519 (1987-08-01), Yoshida et al.
patent: 4798448 (1989-01-01), Van Raalte
"New Fabrication Method of Plastic Micro Lens" by Susuki et al., Applied Physics Society Optics Meeting Microoptics Study Group, Journal vol. 5, No. 2, p. 118, 1987.
"Photolytic Technique for Producing Microlenses in Photosensitive Glass" by Borrelli et al., Applied Optics, vol. 24, No. 16, Aug. 15, 1985, p. 2520.
Gross Anita Pellman
Howell Janice A.
Sharp Kabushiki Kaisha
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