Liquid crystal display device having cholesteric liquid crystal color filter
AssigneeLG.Philips LCD Co., Ltd.
InventorYong-Beom Kim
Life of this patent
Estimating the term…
Abstract
A liquid crystal display device includes first and second substrates spaced apart from each other with a liquid crystal therebetween. The liquid crystal display device adopts a cholesteric liquid crystal color filter. Each portion of the cholesteric liquid crystal color filter is designed to have an adjusted order parameter according to a wavelength of a corresponding color ray. Therefore, with the variously adjusted order parameters of the cholesteric liquid crystal color filter, an increase of the color shift due to a longer wavelength is prevented.
Claims22
A reflective liquid crystal display device comprising:
- upper and lower substrates;
- a liquid crystal layer between the upper and lower substrates;
- a uniaxial film, a retardation layer, and a polarizer sequentially on an upper substrate;
- first transparent electrode between the upper substrate and the liquid crystal layer;
- second transparent electrode between the lower substrate and the liquid crystal layer;
- a cholesteric liquid crystal color filter including first, second, and third portions under the second transparent electrode, each portion of the cholesteric liquid crystal color filter reflecting a different color ray;
- and
- a black layer under the color filter.
An IPS LCD device comprising:
- upper and lower substrates;
- a liquid crystal layer between the upper and lower substrates;
- a uniaxial film and a polarizer sequentially on an upper substrate;
- first transparent electrode between the lower substrate and the liquid crystal layer;
- second transparent electrode on a same plane as the first transparent electrode;
- a cholesteric liquid crystal color filter including first, second, and third portions under the second transparent electrode, each portion of the cholesteric liquid crystal color filter reflecting a different color ray;
- and
- a black layer under the color filter.
Dependencies are inferred from the claim text.