Patent ID: 6806924
Filing Date: 2004-10-19
Classification: G02F,G09G

Abstract:
A liquid crystal display device comprising:at most two liquid crystal panels, wherein; a first liquid crystal panel and a second liquid crystal panel exhibiting at least two stable states of a planar state and a focal conic state with no voltage applied; the first liquid crystal panel and the second liquid crystal panel each comprising a liquid crystal with a memory effect, the liquid crystal having selective reflection wavelenghts in the planar state appearing in a visible range, the first liquid crystals panel and the second liquid crystal panel having different selective reflection wavelengths; the first liquid crystal panel and the second liquid crystal panel being combined to be respectively provided on a viewer side and on a no-viewer side; wherein the first liquid crystal panel has a shorter selective reflection wavelength than the second liquid crystal panel; the selective reflection wavelength of the first liquid crystal panel being set in a range from 430 nm to 540 nm, and the selective reflection wavelength of the second liquid crystal panel being set in a range from 560 nm to 665 nm, whereby at least a black display and a white display can be provided.