Multi-layer light guide apparatus
US8371735B2 · kind B2 · utility
19Cited by
10References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 3, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | May 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0035
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a multi-layer light guide apparatus. Various optical paths are formed as a light source emits light into the apparatus. Main structure of the apparatus includes a body and a micro-structured layer. The body has a first layer with first refractive index (n1) and a second layer with second refractive index (n2). The first layer has a first critical angle (θC1). An interface critical angle (θC12) is formed between the associated first layer and second layer. The light then outputs as the light propagates through the layers. The micro-structured layer is formed on a side of the body. It features:n1<n2;0<|θC12−θC1|≦35°;
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.