Liquid crystal display having a control factor for reducing a chromaticity difference between displayed white and displayed black
AssigneeSharp Kabushiki Kaisha
InventorsTomonori Tanose, Manabu Sawasaki
Life of this patent
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Abstract
In order to suppress color tint during display of black, chromaticity is changed when black is displayed while maintaining chromaticity when white is displayed. For this purpose, the pigment to be dispersed in a color resist is adjusted in particle size and concentration. Such adjustment is so performed that the chromaticity difference between displayed white and black becomes 0.01 or smaller in the x-y chromaticity coordinates by varying the transmissivity of color pixels during display of black. With such a structure, successfully provided is a color liquid crystal display capable of preventing color tint in displayed black, while keeping white chromaticity at the desired level.
Claims13
A liquid crystal display, comprising:
- a plurality of color pixels formed on a substrate;
- an opposite substrate placed facing the substrate;
- liquid crystal sealed between the substrate and the opposite substrate;
- and
- a control factor for reducing the chromaticity difference between displayed white and displayed black by changing a transmissivity on an individual color pixel basis,
- wherein the control factor is a color resist that has a different color for each color pixel,
- wherein the color resist formed in at least one of the color pixels has a material contrast value different from that of the color resists formed in the rest of the color pixels,
- wherein a ratio of a maximum value to a minimum value of the material contrast values is higher than 1.8.
Dependencies are inferred from the claim text.