Normally black liquid crystal display with twisted compensator a

Details Normally black liquid crystal display with twisted compensator a Normally black liquid crystal display with twisted compensator a

1998-06-12

2000-10-31

Parker, Kenneth

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

G02F 11335

Patent

active

061410705

ABSTRACT:
In a reflection-type color liquid crystal display which can display a bright, high-saturation negative-type color display with a background in black or deep color, a pair of polarizing films 8 and 9 are disposed on both sides of a liquid crystal 20 which has a nematic liquid crystal 7 between a pair of substrates 1 and 4 having electrodes respectively, and a twisted retardation film 10 is disposed between the polarizing films 9 and the liquid crystal device 20. The intersecting angle between absorption axes of the pair of polarizing films 8 and 9 is set to be in the range of 60.degree. to 120.degree., the .DELTA.nd value of the liquid crystal device 20 is set to be in the range of 1500 nm to 1800 nm, and the .DELTA.nd value of the twisted retardation film 10 is arranged to be in nearly the same range as the .DELTA.nd value of the liquid crystal device 20.

REFERENCES:
patent: 5548426 (1996-08-01), Miyshita et al.
patent: 5583678 (1996-12-01), Nishino et al.
patent: 5838408 (1998-11-01), Inoue et al.

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