Virtual image display device
US8576491B2 · kind B2 · utility
304Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2012 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jan 24, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In regard to a second direction (combination direction) that is turned back by a reflection at the time of light-guiding, a projective optical system has an emission opening width larger than an opening width of a third reflective surface, such that it is possible to prevent a partial deficiency of image light when the image light emitted from the projective optical system is incident to the third reflective surface from occurring, and thereby it is possible to prevent the occurrence of deficiency of an image or a large variation in brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.