Display, display system, image projection system, and movable object
Provided is a head-up display including a liquid-crystal panel including a display screen, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, a light-diffusion structure between the liquid-crystal panel and the Fresnel lens, a backlight that emits light toward the Fresnel lens, a light-transmissive member between the backlight and the Fresnel lens, and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space, where a length of the liquid-crystal panel in a longitudinal direction of the head-up display is longer than a length of the light-transmissive member in the longitudinal direction.
1. A head-up display comprising:
a liquid-crystal panel including a display screen;
a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen;
a light-diffusion structure between the liquid-crystal panel and the Fresnel lens;
a backlight that emits light toward the Fresnel lens;
a light-transmissive member between the backlight and the Fresnel lens; and
a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space,
wherein a length of the liquid-crystal panel in a longitudinal direction of the head-up display is longer than a length of the light-transmissive member in the longitudinal direction.
2. The head-up display according to claim 1 , wherein
a length of the liquid-crystal panel in the longitudinal direction is longer than a length of the Fresnel lens in the longitudinal direction.
3. The head-up display according to claim 1 , further comprising
a body part accommodating the light-diffusion structure, the backlight and the Fresnel lens.
4. The head-up display according to claim 3 , wherein
the body part has a plurality of plate-shaped fins protruding from an outer surface of the heat sink in a direction intersecting a direction in which the light-diffusion structure and the Fresnel lens are arranged.
5. The head-up display according to claim 3 , wherein
the body part is made of aluminum.
6. The head-up display according to claim 1 , wherein
light emitted from the backlight diverges in a direction toward the Fresnel lens.
7. The head-up display according to claim 1 , wherein
light emitted from the backlight converges in a direction toward the Fresnel lens.
8. The head-up display according to claim 1 , wherein
the light-diffusion structure is provided to a surface of a light-diffusion member facing the liquid-crystal panel.
9. The head-up display according to claim 1 , wherein
the light-diffusion structure is provided to a surface of a light-diffusion member facing the Fresnel lens.
10. The head-up display according to claim 1 , wherein
the light-diffusion structure is provided to each of a surface of a light-diffusion member facing the liquid-crystal panel and a surface of the light-diffusion member facing the Fresnel lens.
11. The head-up display according to claim 1 , wherein
the light-diffusion structure is included in a light-diffusion member; and
the light-diffusion member is made of glass or resin.
12. The head-up display according to claim 1 , wherein
the light-diffusion structure is included in a light-diffusion member; and
the light-diffusion member is made of resin in which fine particles are dispersed.
13. The head-up display according to claim 1 , wherein
the backlight includes light emitting diodes or laser diodes.
14. The head-up display according to claim 1 , wherein
an uneven surface of the Fresnel lens is on the backlight side.