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US 9,851,603 B2Granted
Optical compensation film and liquid crystal display including the same
AssigneesSamsung Electronics Co., Ltd., Sungkyunkwan University Foundation for Corporate Collaboration
InventorsHee Kyung Kim, Jang-Kun Song
Life of this patent
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Abstract
A compensation film for a liquid crystal film includes a first layer including splayed rod-shaped nematic liquid crystal material and a second layer disposed on a surface of the first layer and including at least one of a biaxial layer and an A-plate.
Claims11
A twisted nematic liquid crystal display comprising:
- a twisted nematic mode liquid crystal panel having a first surface and a second surface;
- a first compensation film disposed on the first surface of the twisted nematic mode liquid crystal panel;
- a first polarizing film disposed on an outer surface of the first compensation film;
- a second compensation film disposed on the second surface of the panel;
- and
- a second polarizing film disposed on an outer surface of the second compensation film,
- wherein the compensation film comprising:
- a first layer comprising splayed rod-shaped nematic liquid crystal material;
- and
- a second layer disposed on an outer surface of the first layer and comprising a biaxial layer,
- wherein an optical axis of the second layer is at an angle of about 90 degrees with respect to a splay plane of the first layer, and
- wherein the splay plane of the first layer is substantially parallel to a vector sum of rubbing directions of the twisted nematic mode liquid crystal panel,
- wherein the second compensation film comprises:
- a third layer comprising splayed rod-shaped nematic liquid crystal material;
- and
- a fourth layer disposed on an outer surface of the third layer and comprising a second biaxial layer,
- wherein an optical axis of the fourth layer is at an angle of about 90 degrees with respect to a splay plane of the third layer,
- wherein the splay plane of the third layer is substantially parallel to the splay plane of the first layer.
15 more elements
A twisted nematic liquid crystal display comprising:
- a twisted nematic mode liquid crystal panel having a first surface and a second surface opposing the first surface;
- a first compensation film disposed on the first surface of the panel;
- a first polarizing film disposed on an outer surface of the first compensation film;
- a second compensation film disposed on the second surface of the panel;
- and
- a second polarizing film disposed on an outer surface of the second compensation film,
- wherein the first compensation film comprises:
- a first layer comprising discotic nematic liquid crystal material with a first splay-twist alignment;
- and
- a second layer disposed on an outer surface of the first layer and comprising a first biaxial layer,
- wherein an optical axis of the second layer is at an angle of about 90 degrees with respect to a splay plane of the first layer,
- wherein the splay plane of the first layer is substantially parallel to a vector sum of rubbing directions of the twisted nematic mode liquid crystal panel,
- wherein the second compensation film comprises:
- a third layer comprising discotic nematic liquid crystal material with a second splay-twist alignment;
- and
- a fourth layer disposed on an outer surface of the third layer and comprising a second biaxial layer,
- wherein an optical axis of the fourth layer is at an angle of about 90 degrees with respect to a splay plane of the third layer,
- wherein the splay plane of the third layer is substantially parallel to the splay plane of the first layer, and
- wherein the twist angle of the discotic nematic liquid crystal material in the first layer is in a range from about 2 degrees to about 10 degrees.
16 more elements
Dependencies are inferred from the claim text.