US 8,805,565 B2 · Cutting information determination method, and strip-shaped polarizing sheet manufacturing method therewith, optical display unit manufacturing method therewith, strip-shaped polarizing sheet, and polarizing sheet material

Abstract

Provided are a cutting information determination method that can use a simpler process to improve yield, and a strip-shaped polarizing sheet manufacturing method using such a method, an optical display unit manufacturing method using such a method, a strip-shaped polarizing sheet, and a polarizing sheet material. A cutting position in the width direction A2, in which a polarizing sheet material MP is to be cut along its longitudinal direction A1, is determined based on the numbers of defects counted with respect to plural points in the width direction A2 of the polarizing sheet material MP. This makes it possible to determine the cutting position in such a way that a region with many defects does not fall within the cut width, so that a higher-yield cutting position can be determined. The cutting position can also be determined using a simple process in which defects are counted with respect to plural points in the width direction A2.

Claims11

Dependent claims

A 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, comprising:

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, 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.

1 more element

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 cut width determining step of determining a width into 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.

1 more element

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 information determining step of determining a cutting position in the width direction and a width, in which and into 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.

1 more element

Dependencies are inferred from the claim text.

Cutting information determination method, and strip-shaped polarizing sheet manufacturing method therewith, optical display unit manufacturing method therewith, strip-shaped polarizing sheet, and polarizing sheet material

Life of this patent

Cutting information determination method, and strip-shaped polarizing sheet manufacturing method therewith, optical display unit manufacturing method therewith, strip-shaped polarizing sheet, and polarizing sheet material

Life of this patent

Abstract

Claims11