Polarizing plate and method of manufacturing the same, and liquid crystal display using the polarizing plate
AssigneeNitto Denko Corporation
InventorsKazuhiro Higashio, Hisashi Mihara, Seiichi Kusumoto, Youichirou Sugino
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Abstract
A polarizing plate used for manufacturing a liquid crystal display with suppressed irregularity in brightness, a method of manufacturing the same, and a liquid crystal display using the same, are provided. The polarizing plate is formed having a laminate of a polarizing film and a transparent protective layer provided on at least one surface of the polarizing film. By heat-treating and subsequently reheat-treating, the laminate has a shrinkage force of at most 8N/10 mm width when the laminate is further left at 60° C. for 1 hour, and furthermore, the laminate has a single hue value b of at most 4.6 NBS.
Claims29
A polarizing plate comprising a laminate comprising a polarizing film and a transparent protective layer provided on at least one surface of the polarizing film, wherein
- the laminate has a shrinkage force of at most 8N/ 10 mm width, wherein the shrinkage force is measured after the laminate has been left at 60° C. for 1 hour, and
- the laminate has a single hue value b of at most 4.6 NBS.
A method of manufacturing a polarizing plate comprising a laminate having two exposed surfaces and comprising a polarizing film and a transparent layer provided on at least one surface of the polarizing film, wherein the method comprises:
- heat-treating the laminate and subsequently reheat-treating the laminate, so that the reheat-treated laminate has a shrinkage force controlled to be at most 8N/10 mm width, wherein the shrinkage force is measured after the reheat-treated laminate has been further left at 60° C. for 1 hour, and that the reheat-treated laminate has a single hue value be controlled to be at most 4.6 NBS.
A polarizing plate comprising a laminate having two exposed surfaces and comprising a polarizing film and a transparent protective layer provided on at least one surface of the polarizing film, wherein
- the laminate has a shrinkage force of at most 8N/10 mm width, wherein the shrinkage force is measured after the laminate has been left at 60° C. for 1 hour, and
- the laminate has a single hue value b of at most 4.6 NBS.
A method of manufacturing a polarizing plate comprising a laminate of a polarizing film and a transparent layer provided on at least one surface of the polarizing film, wherein the method comprises:
- heat-treating the laminate and subsequently reheat-treating the laminate, so that the reheat-treated laminate has a shrinkage force controlled to be at most 8N/10 mm width, wherein the shrinkage force is measured after the reheat-treated laminate has been further left at 60° C. for 1 hour, and that the reheat-treated laminate has a single hue value b controlled to be at most 4.6 NBS, and
- arranging the reheat-treated laminate on at least one surface of a liquid crystal cell.
A method of manufacturing a polarizing plate comprising a laminate of a polarizing film and a transparent layer provided on at least one surface of the polarizing film, wherein the method comprises:
- heat-treating the laminate and subsequently reheat-treating the laminate,
- wherein the reheat-treatment is performed at a temperature of from 50° C. to 90° C. and for a time of from 0.5 minutes to 30 minutes, so that the reheat-treated laminate has a shrinkage force controlled to be at most 8N/10 mm width, wherein the shrinkage force is measured after the reheat-treated laminate has been further left at 60° C. for 1 hour, and that the reheat-treated laminate has a single hue value b controlled to be at most 4.6 NBS.
A polarizing plate comprising a laminate comprising a polarizing film and a transparent protective layer provided on at least one surface of the polarizing film, wherein the polarizing film is made from a dyed and stretched film, the laminate is a heat-treated and subsequently reheat-treated laminate, and the laminate has (i) a shrinkage force of at most 8N/10 mm width, wherein the shrinkage force is measured after the laminate has been left at 60° C. for 1 hour, and (ii) a single hue value b of at most 4.6 NBS.
Dependencies are inferred from the claim text.