Elliptically polarizing plate and liquid crystal display device

Details Elliptically polarizing plate and liquid crystal display device Elliptically polarizing plate and liquid crystal display device

1998-06-02

2000-02-08

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 98, G02F 11335

Patent

active

060233141

ABSTRACT:
The elliptically polarizing plate of the present invention has a twisted structure in which a dichroic substance is fixed within a helical structure, and is designed to emit a fixed elliptically polarized light. Within the dichroic substance that forms the helical structure, incident light is divided into left elliptically polarized light and right elliptically polarized light and propagated within the helical structure, the left elliptically polarized light and the right elliptically polarized light rotate along the helical structure, and, in accordance with the helical direction of the helical structure, one of the left elliptically polarized light and the right elliptically polarized light is strongly absorbed and the other is weakly absorbed, whereby a fixed elliptically polarized light is emitted. A liquid crystal display device according to this invention uses the above-described elliptically polarizing plate.

REFERENCES:
patent: 5245456 (1993-09-01), Yoshimi et al.
patent: 5793455 (1998-08-01), Nakamura
patent: 5796454 (1998-08-01), Ma
Okada Toyokazu, "Polymer Film Technology", Third Address of the Liquid Crystal Young Researchers Conference, p. 106.

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