| US 7,486,352 B2 | ||
| Color filter with retardation layer and liquid crystal display | ||
| Norihisa Moriya, Tokyo (Japan) | ||
| Assigned to Dai Nippon Printing Co., Ltd., Tokyo-to (Japan) | ||
| Appl. No. 10/586,844 PCT Filed Sep. 08, 2005, PCT No. PCT/JP2005/016990 § 371(c)(1), (2), (4) Date Jul. 20, 2006, PCT Pub. No. WO2006/028275, PCT Pub. Date Mar. 16, 2006. |
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| Claims priority of application No. 2004-260920 (JP), filed on Sep. 08, 2004. | ||
| Prior Publication US 2007/0159581 A1, Jul. 12, 2007 | ||
| Int. Cl. G02F 1/1335 (2006.01) | ||
| U.S. Cl. 349—106 [349/117; 349/118; 349/119; 349/129; 349/187] | 12 Claims |
| 1. A color filter with a retardation layer comprising:
a substrate;
a colored layer comprising a plurality of rows of light transmissive patterns, whose thickness differs according to its color,
formed on the substrate,
a first retardation layer formed as one continuous layer, on the colored layer, made of a liquid crystalline polymer, having
an optical axis perpendicular to a plane of the substrate so as to function as a C plate; and
a second retardation layer formed on an opposite side of the substrate to a side with the colored layer formed, or between
the substrate and the colored layer, having an optical axis parallel to the plane of the substrate so as to function as a
positive A plate having a positive refractive index anisotropy,
wherein a refractive index anisotropy of the second retardation layer in a visible light range becomes smaller with a shorter
wavelength, and
further wherein a total of a thickness of the colored layer and a thickness of the first retardation layer is constant, and
the thickness of the first retardation layer differs according to a thickness of the light transmissive pattern.
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