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US 11,029,517 B2Granted
Virtual image display device
AssigneeJVC KENWOOD Corporation
InventorManabu Kobayashi
Life of this patent
Estimating the term…
Abstract
A virtual image display device includes: a display unit that generates an image display light by modulating an illumination light; and a projection optical system that includes a concave mirror for reflecting the image display light toward a virtual image presentation plate and a convex lens provided between the display unit and the concave mirror. The display unit is provided at a position closer to the convex lens than a focal point, within a meridional plane, of a composite optical system formed by the virtual image presentation plate and the projection optical system.
Claims4
A virtual image display device comprising:
- a display unit that generates an image display light by modulating an illumination light;
- and
- a projection optical system that includes a concave mirror for reflecting the image display light toward a virtual image presentation plate and a convex lens provided between the display unit and the concave mirror, wherein
- the display unit is provided at a position closer to the convex lens than a focal point, within a meridional plane, of a composite optical system formed by the virtual image presentation plate and the projection optical system, and
- a focal distance of the concave mirror is longer than a focal distance of the convex lens.
2 more elements
Dependencies are inferred from the claim text.