LCD device with polarizers having polarizing and transmittance c

Details LCD device with polarizers having polarizing and transmittance c LCD device with polarizers having polarizing and transmittance c

1996-08-29

2000-01-11

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349113, 349 80, G02F 11335, G02F 11347

Patent

active

060141956

ABSTRACT:
A liquid crystal display device, for displaying pure white, has a first substrate having first electrodes formed thereon; a second substrate positioned to face the first substrate and having second electrodes formed thereon; a liquid crystal sealed between the first and second substrates; and first and second polarization plates arranged to sandwich the first and second substrates and having such polarization characteristics that when the first and second polarization plates are placed one on the other in such a way as to have substantially perpendicular transmission axes, a value acquired by dividing a transmittance of light with a wavelength of 500 nm by a transmittance of light with a wavelength of 440 nm becomes substantially smaller than 0.4. The first and second polarization plates have optical characteristics such that when the first and second polarization plates are placed one on the other in such a way as to have substantially parallel transmission axes, a value acquired by subtracting a transmittance of light with a wavelength of 640 nm from a transmittance of light with a wavelength of 460 nm is greater than -3%.

REFERENCES:
patent: 4552436 (1985-11-01), Kozaki et al.
patent: 4859037 (1989-08-01), Iwashita et al.
patent: 5150237 (1992-09-01), Iimura et al.
patent: 5206752 (1993-04-01), Itoh et al.
patent: 5644415 (1997-07-01), Aoki et al.

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