Color-converting photoluminescent film
US7625501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Sep 21, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1425
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved color-converting photoluminescent film that provides visible light emission in the red to green portion of the visible spectrum when excited by blue light. The color-converted photoluminescent film of the invention is patternable and has improved luminous efficiency and stability and is suitable for use in electroluminescent displays. The film comprises a mixture of a clear UV curable resin and photo-initiator which does not absorb blue light; and fluorescent pigment particles, wherein a molecular additive is optionally provided in to either or both of the pigment particles and curable resin. The mixture is screen printed onto a substrate to form a film and UV cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.