Color conversion film and multicolor-emitting, organic electroluminescent device comprising the color conversion film
US8541777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A color conversion film is disclosed that absorbs light from an organic electroluminescent part emitting blue-green light and converts the light to visible light at a longer wavelength. The color conversion film includes two different dyes. A first dye is a polymer dye with an average molecular weight of 1000 to 1,000,000 that absorbs light incident on the color conversion film and transfers the energy of the light to a second dye. The second dye is a dye that receives the energy from the first dye and emits light. With a multicolor-emitting, organic electroluminescent device including the color conversion film, it is possible to achieve excellent conversion efficiency without increasing the thickness of the color conversion film as in a conventional device using a binder resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.