Head-up display device
First Claim
1. A head-up display device that displays a virtual image of a display image to be visible from an interior of a moving body by projecting the display image onto a projection surface of the moving body, the device comprising:
- a projector that projects a laser beam of the display image; and
a screen member that includes a plurality of optical elements arrayed in a lattice pattern, the screen member guiding the laser beam toward the projection surface by diffusing the laser beam incident on the optical elements from the projector, whereineach of the plurality of optical elements has a curved surface on one side thereof, the curved surface having a common curved shape of one of a convex curve and a concave curve, the curved surface diffusing the laser beam emitted from the curved surface toward the projection surface,the plurality of optical elements include a plurality of reference elements that serve as a reference and a plurality of peripheral element adjacent to the plurality of reference elements,the curved surface of each of the plurality of reference elements has a surface vertex that is offset from a surface vertex of each of the adjacent plurality of peripheral elements, andeach of the plurality of reference elements has a different offset amount with each of the adjacent plurality of peripheral elements.
1 Assignment
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Accused Products
Abstract
Each of a plurality of optical elements that are arrayed in a lattice pattern in a screen member which diffuses a laser beam incident from a projector to guide the laser beam toward a projection surface has a curved surface on a side thereof, and the curved surface has a common convexly curved shape, and diffuses the laser beam which is emitted from the curved surface toward the projection surface. The respective optical elements include a plurality of reference elements which serve as a reference and a plurality of peripheral elements which are adjacent to the respective reference elements. The respective reference elements and the respective adjacent peripheral elements are formed by offsetting surface vertexes of the curved surfaces in a stepwise manner. Offset amounts generated between the respective reference elements and the respective adjacent peripheral elements are different from each other.
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Citations
7 Claims
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1. A head-up display device that displays a virtual image of a display image to be visible from an interior of a moving body by projecting the display image onto a projection surface of the moving body, the device comprising:
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a projector that projects a laser beam of the display image; and a screen member that includes a plurality of optical elements arrayed in a lattice pattern, the screen member guiding the laser beam toward the projection surface by diffusing the laser beam incident on the optical elements from the projector, wherein each of the plurality of optical elements has a curved surface on one side thereof, the curved surface having a common curved shape of one of a convex curve and a concave curve, the curved surface diffusing the laser beam emitted from the curved surface toward the projection surface, the plurality of optical elements include a plurality of reference elements that serve as a reference and a plurality of peripheral element adjacent to the plurality of reference elements, the curved surface of each of the plurality of reference elements has a surface vertex that is offset from a surface vertex of each of the adjacent plurality of peripheral elements, and each of the plurality of reference elements has a different offset amount with each of the adjacent plurality of peripheral elements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification