Light guide employing multilayer optical film
US5661839A · kind A · utility
128Cited by
69References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Mar 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light guide having a non-light emitting portion made up of multiple layers of first and second substantially non-absorptive longitudinally specular light reflector materials. The index of refraction of each layer differs from the indices of refraction of the immediately adjacent layers, such that the layers collectively have high longitudinally specular reflectivity. The light guide also has a light emitting portion made of prism light guide wall material. A substantially non-absorptive light scattering mechanism is positioned within the non-light emitting portion in opposition to the light emitting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.