Virtual image display device
US11119317B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Mar 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A virtual image display device includes a projection optical system that includes a projection mirror that projects an image display light toward a concavely curved surface of a virtual image presentation plate. The projection mirror has a convexly curved surface on which the image display light is incident and reflected diagonally and is arranged such that a direction orthogonal to both a direction of incidence and a direction of reflection of the image display light on the concavely curved surface and a direction orthogonal to both a direction of incidence and a direction of reflection of the image display light on the convexly curved surface are parallel to each other. The display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.