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US 6,665,032 B1Granted
Optically compensated bend mode LCD device
AssigneesNEC Corporation, NEC LCD Technologies, Ltd.
InventorHironori Kikkawa
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Abstract
A LCD device includes a pair of phase compensating plates for controlling the overall retardation of the LCD device substantially at a constant between the substrates. A wavelength-dependent compensating plate is additionally provided for compensating the wavelength dependency of the overall retardation of the LCD device to improve the contrast ratio.
Claims13
A LCD device comprising:
- first and second substrates opposing each other, a LC-layer sandwiched therebetween for allowing transmission of light therethrough;
- an electrode assembly for defining a plurality of pixel areas on said second substrate, biaxial phase compensating plates mounted by one of said first or second substrates, and the
- a single uniaxial wavelength-dependent compensating plate mounted by either one of said first or second substrates;
- wherein said wavelength compensating plate compensates a wavelength dependency of an overall retardation effected by said LC layer;
- and
- wherein said phase compensating plates obtain a substantially constant retardation with respect to different wavelengths of the transmittal light.
3 more elements
Dependencies are inferred from the claim text.