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US 7,403,247 B2Granted
Polarizer for compensation of gravity defect in liquid crystal display device
AssigneeLG Display Co., Ltd.
InventorsSu Woong Lee, Mon Soo Kang
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Abstract
An LCD device is disclosed, having a polarizer of which a retardation value is variable on regions for compensation of gravity defect caused by an excess liquid crystal at room temperature, wherein the LCD device includes an LCD panel having a normal cell gap region and an abnormal cell gap region; and the polarizer having a compensated retardation value Δnd for the abnormal cell gap region.
Claims6
An LCD device comprising:
- an LCD panel having a normal cell gap region and an abnormal cell gap region;
- and
- a polarizer having a compensated retardation value Δnd for the abnormal cell gap region, said compensated retardation value for the abnormal cell gap region being different than a compensated retardation value for the normal cell gap region,
- wherein the abnormal cell gap region is induced by a gravity defect and
- wherein the polarizer includes a PVA layer, a first TAC layer on the PVA layer, a second TAC layer under the PVA layer, and a discotic liquid crystal layer under the second TAC layer and thickness of the discotic liquid crystal layer corresponding to the abnormal cell gap region linearly decreases from an edge line of the LCD panel to a middle line of the abnormal cell gap region, and from an end of finishing line of the abnormal cell gap to the middle line of the abnormal cell gap region.
2 more elements
Dependencies are inferred from the claim text.