Methods for manufacturing polarizing element, polarizing element roll and single sheet type polarizing element having local bleaching areas
US10429560B2 · kind B2 · utility
7Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Jul 18, 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 of iodine and dichroic dye is oriented in a certain direction; forming a mask layer including at least one punched area on one surface of the polarizing element; partially bleaching the polarizing element formed with the mask layer by immersing the polarizing element into a bleaching solution; and correcting an appearance of the partially bleached polarizing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.