Method of producing a retardation plate, retardation plate, polarizing plate with a retardation plate, liquid crystal panel, and liquid crystal display apparatus
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United States of America Patent
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May 7, 2013
Grant Date -
Nov 26, 2009
app pub date -
Jan 15, 2007
filing date -
Jan 30, 2006
priority date (Note) -
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Abstract
A method of producing a retardation plate includes the steps of applying a solution containing a resin B and a solvent to an optical base material containing a resin A to obtain a laminate including an optical base material layer and an application layer, and stretching the laminate, in which one of the resin A and the resin B has positive alignment birefringence, and another one of the resin A and the resin B has negative alignment birefringence, and the stretching is performed by setting an amount of a residual solvent in the laminate to be 2 to 10% by weight.
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