Electroluminescent device and method for producing the same
US6617784B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electroluminescent (EL) device is disclosed and includes an electroluminescent element (9) having a light-emitting surface (91), and a prismatic film (1) having a surface (11) on which a plurality of prisms are provided and a back surface (12) opposed to said surface (11) and being placed on said light-emitting surface (91), wherein the back surface (12) of the prismatic film (1) and said light-emitting-surface (91) of the electroluminescent element (9) are closely bonded optically. The EL device can effectively intensify the light which is emitted in the normal line direction and also in the direction deviating from the normal line, and increase the luminance in the wide observation angle range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.