Color liquid crystal display device and color liquid crystal display apparatus
OwnerYasufumi Asaoinventor
Life of this patent
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Abstract
A hybrid color liquid crystal display device includes a liquid crystal layer in which liquid crystal molecules are aligned homeotropically with respect to a pair of substrates under no voltage application and includes a phase plate having an optical axis in a direction perpendicular to a substrate surface. The phase plate has a refractive index which is larger in an in-plane direction of substrate than in a direction normal to the substrate surface, and has a retardation smaller than a retardation of the liquid crystal layer in terms of an absolute value, thereby to suppress a change in color depending on a viewing angle.
Claims11
A color liquid crystal display device, comprising:
- a polarizer;
- a first phase plate;
- first and second substrates, disposed opposite to each other, each provided with an electrode;
- a liquid crystal layer comprising liquid crystal molecules;
- and
- a plurality of pixels each comprising a first subpixel for displaying chromatic color by changing an in-plane retardation of said liquid crystal layer depending on an applied voltage and a second subpixel, provided with a color filter, for displaying color of the color filter by changing an in-plane retardation in a brightness change range depending on the applied voltage;
- wherein said first phase plate has an optical axis perpendicular to a substrate surface;
- a refractive index in a direction normal to the substrate surface smaller than a refractive index in an in-plane direction;
- and an out-of-plane retardation in terms of an absolute value between an out-of-plane retardation of said liquid crystal layer of the first or the second subpixel when the pixel is in a minimum-brightness state and an out-of-plane retardation of said liquid crystal layer of the first or the second subpixel when the pixel is in a color-displaying state.
Dependencies are inferred from the claim text.