Turning light pipe for a pupil expansion system and method
US10088675B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2015 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Sep 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display system includes a light pipe including elongated surfaces and an input coupler. The light pipe is configured to provide an image received by the input coupler and expand the image in a first direction through one of the elongated surfaces. The display also includes a waveguide including an output grating, a first surface, a second surface, and a side surface. The first surface and the second surface have a larger area than the side surface, the output grating being configured to provide the image expanded in a second direction. The second direction is different than the first direction. The image enters the waveguide from the one of the elongated surfaces at the side surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.