ECB type liquid crystal display device having birefringent layer

Details ECB type liquid crystal display device having birefringent layer ECB type liquid crystal display device having birefringent layer

1992-05-21

1992-12-29

James, Andrew J.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 63, 359 82, 359 93, G02F 1133, G02F 1137

Patent

active

051756382

ABSTRACT:
A liquid crystal display device including (1) a liquid crystal cell in which a liquid crystal layer with a liquid crystal composition having a positive dielectric anisotropy is sandwiched between a pair of substrates each having at least one electrode, and the liquid crystal molecules in the liquid crystal layer are homogeneously aligned between the substrates, (2) a pair of polarizers disposed so as to sandwich the liquid crystal cell therebetween and (3) at least one birefringent layer sandwiched between the liquid crystal layer and the polarizer, in which the maximum refractive index direction within the plane of the birefringent layer is substantially perpendicular to the aligning direction of the liquid crystal molecules. The device is excellent particularly in highly multiplexing driving characteristic as a black and white light shutter or a color display device.

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Iimura et al. "STN-LCD with Improved Viewing Angle Characteristics Using A Birefringent Film" SID 89 Digest-vol. XX-May 1989-pp. 398-401.

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