Optical constructions incorporating a light guide and low refractive index films
US8950924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2010 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Dec 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/107
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Optical constructions use a low index of refraction layer (120) disposed between a low absorption layer (101) and a high absorption layer (103) to increase confinement of light to the low absorption region of the optical constructions. Low index layers can be used in optical constructions that have multi-tiered light confinement. In these constructions, a first tier of reflection is provided when light is reflected at the surface of a low index optical film which is disposed directly or indirectly on a light guide (110). A second tier of reflection occurs at the surface of a light redirecting film having appropriately oriented refractive structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.