Liquid crystal display and organic EL display
View Patent ↗Disclosed is a liquid display device that is capable of suppressing a change in contrast of a liquid crystal display panel, in which a screen is a curved surface with a curvature in one direction. In a liquid crystal display panel having a cylindrical surface, an upper polarizing plate is attached to a color filter substrate. The upper polarizing plate receives tensile stress in a curved direction. Tensile stress adversely affects polarization characteristics of the upper polarizing plate. According to an embodiment of the invention, if the absorption axis A of the upper polarizing plate is adapted to match with the curved direction of the liquid crystal display panel, it is possible to prevent a change in polarization characteristics of the upper polarizing plate. As a result, it is possible to obtain an image with excellent contrast for a long term.
1. A liquid crystal display comprising:
a liquid crystal display panel, the liquid crystal display panel including a TFT substrate having formed thereon pixel electrodes and TFTs, a color filter substrate having formed thereon color filters, liquid crystal interposed between the color filter substrate and the TFT substrate, a first polarizing plate attached to the color filter substrate, and a second polarizing plate attached to the TFT substrate,
wherein the liquid crystal display panel has an outwardly convex screen with a curvature in one direction, and the first polarizing plate substantially has an absorption axis in a direction in which the liquid crystal display panel has a curvature, and
an angle between an axis in the direction, in which the liquid crystal display panel has a curvature, and the absorption axis of the first polarizing plate is 10±5 degrees.
2. The liquid crystal display according to claim 1 ,
wherein the absorption axis of the second polarizing plate and a direction perpendicular to that in which the liquid crystal display panel has a curvature is 10±5 degrees.
3. A liquid crystal display comprising:
a liquid crystal display panel, the liquid crystal display panel including a TFT substrate having formed thereon pixel electrodes and TFTs, a color filter substrate having formed thereon color filters, liquid crystal interposed between the color filter substrate and the TFT substrate, a first polarizing plate attached to the color filter substrate, and a second polarizing plate attached to the TFT substrate,
wherein the liquid crystal display panel has an outwardly concave screen with a curvature in one direction, and an angle between the absorption axis of the first polarizing plate and a direction perpendicular to that in which the liquid crystal display panel has a curvature is 10±5 degrees.
4. The liquid crystal display according to claim 3 ,
wherein an angle between the absorption axis of the second polarizing plate and the direction in which the liquid crystal display panel has a curvature is 10±5 degrees.