High efficiency chiral nematic liquid crystal rear polarizer for

Details High efficiency chiral nematic liquid crystal rear polarizer for High efficiency chiral nematic liquid crystal rear polarizer for

1993-06-29

1996-01-23

Sikes, William L.

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 49, 359 65, 359105, G02F 113, G02F 11335

Patent

active

054869358

ABSTRACT:
The efficiency of LC displays is improved by the use of a polymeric chiral nematic liquid crystal rear polarizer and reflective backlight housing which increases the net transmission of light and, at the same time, reduces the weight of the assemblage and increases battery life by utilizing lower levels of illumination. The polymeric chiral nematic liquid crystal can be a freestanding film or films, or can be supported by a single glass substrate. The liquid crystal polarizer can have a bandwidth sufficient to transmit electromagnetic radiation across the entire visible spectrum.

REFERENCES:
patent: 4315258 (1982-02-01), McKnight et al.
patent: 4818076 (1989-04-01), Heppke et al.
patent: 5235443 (1993-08-01), Barnik et al.
patent: 5319478 (1994-06-01), Funfschilling et al.
Wu et al., "Optical and electro-optic properties of cyanotolanes and cyanostilbenes: Potential infrared liquid crystals", Journal of Applied Physics, vol. 64, No. 2, 15 Jul. 1988, pp. 821-826.

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