Front light extraction film for light guiding systems and method of manufacture
US5995690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Nov 21, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a front light extraction tape for coupling light out of a light guiding device. The tape has a flexible, light transmissive outer portion and a light coupling element secured to a lower surface of the outer portion without using adhesive. An input surface of the light coupling element is contactable with an output surface of the light guiding device for receiving light therefrom. A reflecting surface of the light coupling element is aligned so as to reflect light received into the light coupling element through the light transmissive outer portion. The light coupling element may be formed integrally with the outer portion so as to avoid a material interface between the light coupling element and the outer portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.