Methods for manufacturing polarizing element, polarizing element roll and single sheet type polarizing element having local bleaching areas
US10436960B2 · kind B2 · utility
7Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Apr 8, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2029/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for manufacturing a polarizing element including locally bleached areas including steps of providing a polarizing element including a polyvinyl alcohol-based polarizer in which at least one or more of iodine and dichroic dye is oriented in a certain direction; partially bleaching the polyvinyl alcohol-based polarizer by bringing a bleaching solution into contact with one surface of the polyvinyl alcohol-based polarizer through a printing method; and correcting an appearance of the partially bleached polarizing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.