El lamp with light scattering particles in cascading layer
US6703781B2 · kind B2 · utility
42Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Jul 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Light scattering particles are added to the ink used for printing the cascading layer. The particles and cascading material are then printed in the same layer. Light entering the cascading layer is scattered, re-entering the cascading material thereby increasing the effectiveness of the cascading material and enabling one to use less material. Because less cascading material is used, the cost of the EL lamp is reduced and cascading efficiency is increased. The light scattering particles and the cascading material are in an overprint or are in the phosphor layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.