Patent ID: 9623579
Date: 2017-04-18
CPC Classifications: B26D,B32B,G02B,Y10T

Claim:
1. A strip-shaped polarizing sheet, comprising a product manufactured by a method for manufacturing a strip-shaped polarizing sheet and having information about the positions of defects, wherein the method for manufacturing the strip-shaped polarizing sheet comprises cutting a polarizing sheet material along its longitudinal direction based on cutting information determined by a cutting information determination method, wherein the cutting information determination method for determining information about how to cut a polarizer-containing long polarizing sheet material along its longitudinal direction so that a long strip-shaped polarizing sheet with a predetermined cut width can be produced, comprises: a defect detecting step of detecting information about the positions of defects in the polarizing sheet material; a defect counting step of counting defects present in the longitudinal direction with respect to each of a plurality of points in a width direction perpendicular to the longitudinal direction, based on the information about the positions of the detected defects; and a cutting position determining step of determining a cutting position in the width direction from the cutting position of areas, for each of which the number of defects within an area defined by the cutting position and the predetermined cut width is less than a predetermined number, in which the polarizing sheet material is to be cut along the longitudinal direction, based on the counted numbers of defects with respect to the plurality of points.