Illuminator with polarization separating anisotropic layer betwe

Details Illuminator with polarization separating anisotropic layer betwe Illuminator with polarization separating anisotropic layer betwe

1996-10-21

1998-09-15

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 98, 362 19, 362 26, 362311, G02F 11335, F21V 914, F21V 300, G01D 1128

Patent

active

058087095

ABSTRACT:
An illuminator includes a light guide in the form of a light pipe, one surface of which is provided with a polarization separating layer in the form of an anisotropic layer for separating substantially all of the light of one polarization from the orthogonal polarization component. The anisotropic layer is provided between the light pipe and a reflector. The layer has a first refractive index greater than or equal to that of the light pipe and a second refractive index less than that of the light pipe.

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M. Schadt et al., Japanese Journal of Applied Physics, vol. 29, No. 10, pp. 1974-1984, 1990 "New Liquid Crystal Polarized Color Projection Principle".
C.Y. Tai et al., SID 94 Applications Digest, pp. 10-13, 1994, "A1.3: Flat Collimator: A Backlighting Assembly Utilizing Microprisms for High Energy Efficiency".

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