Optical waveguide and display device
US8611014B2 · kind B2 · utility
184Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2010 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Apr 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4272
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a slab waveguide which expands an image-bearing pupil into a visible image, reflective edge surfaces are used to redirect once-diffracted light back through the same grating structure. The number of separate grating structures thereby can be reduced to two or even one, compared to three in the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.