Liquid crystal display device having a cholesteric order with a

Details Liquid crystal display device having a cholesteric order with a Liquid crystal display device having a cholesteric order with a

1997-01-29

1998-08-25

Thomas, Tom

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 98, 349117, 349175, 349185, 349181, 257 59, 257 72, G02F 113

Patent

active

057988080

ABSTRACT:
In a liquid crystal display device the number of grey levels is increased by means of a compensation foil comprising a layer having a cholesteric ordering with a helix pattern, in which the pitch of the helix is smaller than (0.26-0.31..DELTA.n) .mu.m, in which .DELTA.n is the optical anisotropy of the anisotropic layer. Moreover, the viewing angle dependence will be more symmetrical by patterning the cholesteric ordering.

REFERENCES:
patent: 5210630 (1993-05-01), Heynderickx et al.
patent: 5295009 (1994-03-01), Barnik et al.
patent: 5506704 (1996-04-01), Broer et al.

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