Method for producing polarizing plate, polarizing plate and image display device using the same
AssigneeNitto Denko Corporation
InventorMakoto Kuwamura
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Abstract
A method of producing a polarizing plate, including the step of laminating a pair of curled protective sheets onto opposite surfaces of a polarizer respectively so that respective curling directions of the pair of curled protective sheets are reverse to each other, wherein the laminating index of the pair of protective sheets is selected to be not higher than 60 in order to restrain the polarizing plate from being curled.
Claims16
A method of producing a polarizing plate, comprising the step of laminating a pair of curled protective sheets, said protective sheets having an intrinsic tendency to curl in respective curling directions, onto opposite surfaces of a polarizer respectively so that respective curling directions of said pair of curled protective sheets are reverse to each other, wherein said pair of curled protective sheets have a laminating index L of not higher than 60 when the laminating index L is given by the expression:
- L=(a−b)/a×100
- in which a and b are quantities of curl in said pair of protective sheets respectively on the assumption of a>b.
A polarizing plate comprising a polarizer, and a pair of protective sheets laminated onto opposite surfaces of said polarizer respectively, wherein each of said protective sheets has an intrinsic tendency to curl, such that curling directions of said pair of protective sheets would be reverse to each other upon separation if said pair of protective sheets were separated from said polarizing plate, wherein said pair of curled protective sheets have a laminating index L of not higher than 60 when the laminating index L is given by the expression:
- L=(a−b)/a×100
- in which a and b are quantities of curl in said pair of protective sheets respectively on the assumption of a>b.
Dependencies are inferred from the claim text.