LCD having a polarization or diffusion plate with an irregularly coated first opaque material and a black matrix of a second opaque material
AssigneeSamsung Electronics Co., Ltd.
InventorDong-gyu Kim
Life of this patent
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Abstract
A liquid crystal display with an improved viewing angle is disclosed which prevents gray scale inversion within a range of 60.degree. in every direction because the change of a gray level according to the viewing angle is small. Light transmitted through the liquid crystal is scattered by a diffusion plate so that the brightness in front can be improved instead of narrowing the viewing angle, or uniform screen quality can be obtained by widening the viewing angle. The diffusion coefficient of the diffusion plate can be easily controlled. Further, it is possible to prevent a decrease in contrast due to external ambient light by screen-printing a black matrix pattern or atomizing a black dye on the diffusion plate.
Claims15
A liquid crystal display (LCD), comprising:
- a backlight;
- a liquid crystal cell;
- a diffusion plate for diffusing light after passing through said liquid crystal cell, said diffusion plate being made of a transparent plate on which transparent material is coated ruggedly;
- first opaque material irregularly coated with a predetermined density on said diffusion plate;
- and
- a black matrix of second opaque material printed on said diffusion plate with a pattern corresponding to a shape of said liquid crystal cell.
A polarization plate for a liquid crystal display (LCD), comprising:
- a polarizer;
- a diffusion plate for diffusing light attached to said polarizer, said diffusion plate being a transparent plate on which transparent material is ruggedly coated;
- and
- first opaque material irregularly coated with a predetermined density on said diffusion plate;
- and
- a black matrix of second opaque material printed on said diffusion plate with a pattern corresponding to a shape of a liquid crystal cell.
A liquid crystal display (LCD), comprising:
- a backlight;
- an liquid crystal cell;
- and
- a polarization plate disposed on a side of said liquid crystal cell opposite said backlight, said polarization plate including:
- a diffusion plate for diffusing light passing through said liquid crystal cell, said diffusion plate being made of a transparent plate on which transparent material is ruggedly coated;
- and
- first opaque material irregularly coated with a predetermined density on said diffusion plate;
- and
- a black matrix of second opaque material printed on said diffusion plate with a pattern corresponding to a shape of said liquid crystal cell.
Dependencies are inferred from the claim text.