Backlight unit and head-up display device
AssigneeYazaki Corporation
InventorNoriaki Narushima
Life of this patent
Estimating the term…
Abstract
A backlight unit includes a light source, a light collecting member that collects light emitted from the light source, and a concave reflecting surface, and includes a micromirror array that reflects the light incident from the light collecting member toward a liquid crystal panel by the reflecting surface and a diffusion plate that is arranged on an optical path between the micromirror array and the liquid crystal panel. In the micromirror array, the reflecting surface includes the plurality of micromirrors. One or more groups of the plurality of micromirrors are arranged in the reflecting surface in an X direction and a Y direction. Each micromirror includes a convex or concave curved surface.
Claims8
A backlight unit, comprising:
- at least one light source;
- a light collecting member that collects light emitted from the light source;
- an optical member that includes a concave reflecting surface and reflects light incident from the light collecting member toward a light transmissive liquid crystal display element by the reflecting surface;
- and
- a diffusion plate that is arranged on an optical path between the optical member and the liquid crystal display element, wherein
- the reflecting surface of the optical member includes a plurality of micromirrors,
- one or more groups of the plurality of micromirrors are arranged in the reflecting surface in a first direction and a second direction orthogonal to the first direction, and
- each of the micromirrors includes a convex or concave curved surface.
A head-up display device, comprising:
- a light transmissive liquid crystal display element;
- and
- a backlight unit, wherein
- the backlight unit includes:
- at least one light source;
- a light collecting member that collects light emitted from the light source;
- an optical member that includes a concave reflecting surface and reflects light incident from the light collecting member toward the liquid crystal display element by the reflecting surface;
- and
- a diffusion plate that is arranged on an optical path between the optical member and the liquid crystal display element,
- the reflecting surface of the optical member includes a plurality of micromirrors,
- one or more groups of the plurality of micromirrors are arranged in the reflecting surface in a first direction and a second direction orthogonal to the first direction, and
- each of the micromirrors includes a convex or concave curved surface.
Dependencies are inferred from the claim text.