Circular polarizing plate and organic electroluminescence panel
US9400345B2 · kind B2 · utility
1Cited by
17References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2013 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Jun 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/8791
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a circularly polarizing plate that can prevent light leakage in an organic EL panel and can suppress the warping of the panel to reduce reflection unevenness in a panel surface. A circularly polarizing plate according to an embodiment of the present invention is used in an organic EL panel, and includes a polarizer and a retardation film directly bonded to the polarizer. In-plane retardations of the retardation film satisfy a relationship of Re(450)<Re(550); and a 90° adhesive strength between the polarizer and the retardation film is 1.0 N/20 mm or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.