Liquid crystal display device and electronic device using same

Details Liquid crystal display device and electronic device using same Liquid crystal display device and electronic device using same

1998-08-07

1999-11-16

Dang, Hung Xuan

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 96, 359494, G02F 11335

Patent

active

059867310

ABSTRACT:
The present invention relates to a liquid crystal display device, particularly a liquid crystal display device provided with a retardation film, and an electronic device using the same, and provides a liquid crystal display device which satisfactorily and certainly eliminates coloring in the ON-state as well as in the OFF-state and gives a good contrast, and an electronic device using the same. The invention provides a liquid crystal display device comprising a liquid crystal display panel having a liquid crystal layer and a retardation film for eliminating coloring caused on the liquid crystal display panel; wherein a polarized light separator comprising a first film having birefringence and a second film not having birefringence is arranged at least on one side of the liquid crystal display panel; the ratio B.sub.LC /B.sub.RF of the wavelength dispersion B.sub.LC of refractive index anisotropy in the liquid crystal display panel to the wavelength dispersion of retardation in the retardation film is at least 1.02; and the ratio R.sub.450 /R.sub.650 of the reflectivity R.sub.450 at a wavelength of 450 nm of the polarized light separator to the reflectivity R.sub.650 at a wavelength of 650 nm is at least 1.

REFERENCES:
patent: 5684551 (1997-11-01), Nakamura et al.
patent: 5828488 (1998-10-01), Ouderkirk et al.

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