Phosphor layer, image display device employing the same and method for making the phosphor layer
US7361417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Jan 22, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A phosphor layer having improved contrast and brightness characteristics and a display device including the same are provided. The phosphor layer is made out of an ultra-fine pigment, a dispersant, a phosphor, a photosensitizer and a binder. The phosphor has a uniform distribution along the thickness of the phosphor layer, and the pigment varies in content over the thickness of the phosphor layer. A method of forming the phosphor layer is based on existing phosphor layer processes and includes a reduced number of processing steps than a filter screen method, thereby markedly lowering the manufacturing costs. The phosphor layer can be used in a cathode ray tube, a plasma display panel, a field emission display, and an organic electroluminescent device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.