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US 10,481,308 B2Granted
Optical film, method for manufacturing optical film, and liquid crystal display including optical film
AssigneeLG Display Co., Ltd.
InventorsWonjong Cho, Sudong Roh, Daeheung Lee
Life of this patent
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Abstract
Provided are an optical film, a method for manufacturing an optical film, and a liquid crystal display. An optical film includes: a polarizer, a diffusion sheet adhered to a bottom surface of the polarizer, the diffusion sheet including: a first diffusion member, and a second diffusion member adhered to the first diffusion member, and a prism sheet adhered to a bottom surface of the diffusion sheet.
Claims23
An optical film, comprising:
- a polarizer comprising a polyvinyl alcohol (PVA) core layer;
- an ultraviolet (UV) adhesive layer under a bottom surface of the PVA core layer;
- a diffusion sheet adhered to a bottom surface of the polarizer, the diffusion sheet comprising:
- a first diffusion member comprising a first convex portion, the first diffusion member being adhered to the UV adhesive layer such that the UV adhesive layer is between and directly contacts both of the PVA core layer and the first diffusion member;
- a second diffusion member adhered to the first diffusion member, the second diffusion member comprising a second convex portion;
- and
- a first adhesive layer between the first diffusion member and the second diffusion member, the first diffusion member and the second diffusion member being adhered together by the first adhesive layer, the first diffusion member and the second diffusion member contacting the same first adhesive layer;
- and
- a prism sheet adhered to a bottom surface of the diffusion sheet, the prism sheet comprising:
- a first prism pattern having a plurality of points at a first height;
- and
- a second prism pattern having a plurality of points at a second height less than the first height, at least one of the plurality of points of the second prism pattern being between at least two of the plurality of points of the first prism pattern.
9 more elements
A method for manufacturing an optical film, the method comprising:
- providing a polarizer comprising a polyvinyl alcohol (PVA) core layer;
- providing an ultraviolet (UV) adhesive layer under a bottom surface of the PVA core layer;
- providing a diffusion sheet adhered to a bottom surface of the polarizer, the providing the diffusion sheet comprising:
- providing a first diffusion member comprising a first convex portion, the first diffusion member being adhered to the UV adhesive layer such that the UV adhesive layer is between and directly contacts both of the PVA core layer and the first diffusion member;
- providing a second diffusion member adhered to the first diffusion member, the second diffusion member comprising a second convex portion;
- and
- providing a first adhesive layer between the first diffusion member and the second diffusion member, the first diffusion member and the second diffusion member being adhered together by the first adhesive layer, the first diffusion member and the second diffusion member contacting the same first adhesive layer;
- and
- providing a prism sheet adhered to a bottom surface of the diffusion sheet, the providing the prism sheet comprising:
- providing a first prism pattern having a plurality of points at a first height;
- and
- providing a second prism pattern having a plurality of points at a second height less than the first height, at least one of the plurality of points of the second prism pattern being between at least two of the plurality of points of the first prism pattern.
9 more elements
A liquid crystal display, comprising:
- a display panel;
- and
- an optical film adhered under the display panel, the optical film comprising:
- a polarizer comprising a polyvinyl alcohol (PVA) core layer;
- an ultraviolet (UV) adhesive layer under a bottom surface of the PVA core layer;
- a diffusion sheet adhered to a bottom surface of the polarizer, the diffusion sheet comprising:
- a first diffusion member comprising a first convex portion, the first diffusion member being adhered to the UV adhesive layer such that the UV adhesive layer is between and directly contacts both of the PVA core layer and the first diffusion member;
- a second diffusion member adhered to the first diffusion member, the second diffusion member comprising a second convex portion;
- and
- a first adhesive layer between the first diffusion member and the second diffusion member, the first diffusion member and the second diffusion member being adhered together by the first adhesive layer, the first diffusion member and the second diffusion member contacting the same first adhesive layer;
- and
- a prism sheet adhered to a bottom surface of the diffusion sheet, the prism sheet comprising:
- a first prism pattern having a plurality of points at a first height;
- and
- a second prism pattern having a plurality of points at a second height less than the first height, at least one of the plurality of points of the second prism pattern being between at least two of the plurality of points of the first prism pattern.
12 more elements
Dependencies are inferred from the claim text.