HEAD-UP DISPLAY AND VEHICLE
First Claim
1. A head-up display comprising:
- a display device having a display surface for displaying an image;
a projection optical system for projecting an image displayed on the display surface onto a viewing area for an observer;
a refractive optical system disposed in an optical path from the display surface to the viewing area and between the projection optical system and the viewing area;
a housing that has an opening and contains the display device, the projection optical system and the refractive optical system; and
an opening cover that has at least partially a curved portion, and is disposed in the opening so that light emitted from the display surface is incident on a convex side of the curved portion,wherein when a light beam that is emitted from a center of the display surface and reaches a center of the viewing area is referred to as a reference light beam, the head-up display satisfies the following condition (1);
L2≧
L1
(1)where L1 is a distance from an end on an anterior side of the observer on a smaller curvature surface of the refractive optical system to the opening cover, and L2 is a distance from a position at which the reference light beam passes through the smaller curvature surface of the refractive optical system to the opening cover.
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Accused Products
Abstract
A refractive optical system is disposed in an optical path from a display surface to a viewing area and between a projection optical system and the viewing area. A housing receives a display device, the projection optical system, and the refractive optical system, and is provided with an opening. An opening cover has at least partially a curved portion, and is disposed in the opening so that light emitted from the display surface is incident on a convex side of the curved portion. When a light beam that is emitted from a center of the display surface and reaches a center of the viewing area is referred to as a reference light beam, a head-up display satisfies the following condition (1):
L2≦L1 (1)
where
L1 is a distance from an end on the anterior side of the observer of the refractive optical system to the opening cover, and
L2 is a distance from a position at which the reference light beam passes through the refractive optical system to the opening cover.
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Citations
6 Claims
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1. A head-up display comprising:
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a display device having a display surface for displaying an image; a projection optical system for projecting an image displayed on the display surface onto a viewing area for an observer; a refractive optical system disposed in an optical path from the display surface to the viewing area and between the projection optical system and the viewing area; a housing that has an opening and contains the display device, the projection optical system and the refractive optical system; and an opening cover that has at least partially a curved portion, and is disposed in the opening so that light emitted from the display surface is incident on a convex side of the curved portion, wherein when a light beam that is emitted from a center of the display surface and reaches a center of the viewing area is referred to as a reference light beam, the head-up display satisfies the following condition (1);
L2≧
L1
(1)where L1 is a distance from an end on an anterior side of the observer on a smaller curvature surface of the refractive optical system to the opening cover, and L2 is a distance from a position at which the reference light beam passes through the smaller curvature surface of the refractive optical system to the opening cover. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification