Prism sheet of liquid crystal display device and backlight unit using the same
AssigneeLG.Electronics Inc.
InventorsSang Gou Lee, Chang Jong Kim, Young Gun Kim, Yun Ho Choi, Ho Sung Chin, Bong Taek Hong, Kab Jin Hwang, Ung Sang Lee, Chul Young Kim
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Abstract
A prism sheet of an LCD includes a body part made of a transparent resin material and a plurality of polypyramid-shaped optical unit structures formed in a intaglio type on the body part. The plurality of optical unit structures have intaglio-type polypyramid shapes in an inside of their polygonal structure. A center of the intaglio portion corresponds to a vertex of the polypyramid, thereby forming a point.
Claims21
A prism sheet of an LCD (liquid crystal display) comprising:
- a body part made of a transparent resin material;
- and
- a plurality of substantially polypyramid-shaped optical unit structures formed in an intaglio type on the body part, wherein the plurality of optical unit structures have intaglio-type substantially polypyramid shapes in an inside of substantially polygonal structures, a center of an intaglio portion substantially corresponding to a vertex of the polypyramid, thereby forming a point.
A backlight unit of an LCD comprising:
- a lamp;
- a light guide plate arranged in one end of the lamp;
- a reflective plate arranged on a lower part of the light guide plate;
- and
- a diffusion sheet and a prism sheet arranged on an upper part of the light guide plate, wherein the prism sheet has a body part made of a transparent resin material and a plurality of optical unit structures having an intaglio type substantially polypyramid shape in an inside of substantially polygonal structures on the body part, a center of an intaglio portion of the optical unit structures substantially corresponding to a vertex of the polypyramid, thereby forming a point.
A method of forming a prism sheet having a body part made of a transparent resin material;
- and a plurality of substantially polypyramid-shaped optical unit structures formed in an intaglio type on the body part, wherein the plurality of optical unit structures have intaglio-type substantially polypyramid shapes in an inside of substantially polygonal structures, a center of an intaglio portion substantially corresponding to a vertex of the polypyramid, thereby forming a point, the method comprising:
- providing a body part including a transparent resin;
- providing a liquid PMMA (Polymethylmethacrylate) material to a relief mold on a first surface of the body part;
- and hardening the liquid PMMA.
Dependencies are inferred from the claim text.