Head-up display device

A head-up display device mounted on a mobile object, the head-up display device configured to project an image on a projection member to display a virtual image and to enable an occupant to visually recognize the image, the head-up display device comprising:

• a plurality of light emitting devices arranged with each other and each configured to emit an illumination light;
• an image forming unit including an illumination target surface, the image forming unit configured to illuminate a corresponding region of the illumination target surface with the illumination light from one of the light emitting devices to form the image;
• and
• a light condensing unit configured to collect the illumination light from each of the light emitting devices and to cause the illumination light to be incident on the illumination target surface, wherein
• the light condensing unit includes a condenser lens array in which a plurality of lens elements are aligned with each other,
• the lens elements are paired with the light emitting devices, respectively,
• each of the lens elements is provided with a light condensing surface to condense the illumination light,
• a z-direction is defined as a direction in which surface vertexes of the light condensing surfaces are connected with the light emitting devices paired with the light condensing surfaces, respectively,
• an x-direction and a y-direction are defined to be orthogonal to each other on a virtual plane orthogonal to the z-direction,
• the pairs of the condenser lens elements and the light emitting devices are aligned in at least one of the x-direction and the y-direction as an alignment direction,
• each of the light condensing surfaces is an anamorphic surface formed in a convex shape in which a curvature in the x-direction and a curvature in the y-direction are different from each other,
• one of the x-direction and the y-direction is set as the alignment direction and the other is set as the other direction,
• the illumination target surface is in a rectangular shape having a dimension La in a direction on the illumination target surface corresponding to the alignment direction and having a dimension Ls in a direction on the illumination target surface corresponding to the other direction,
• an alignment number of pairs of the condenser lens elements and the light emitting devices in the alignment direction is Na,
• La/Na<Ls is satisfied, and
• the curvature in the alignment direction is greater than the curvature in the other direction.

A head-up display device mounted on a mobile object, the head-up display device configured to project an image on a projection member to display a virtual image and to enable an occupant to visually recognize the image, the head-up display device comprising:

• a plurality of light emitting devices arranged with each other and each configured to emit an illumination light;
• an image forming unit including an illumination target surface, the image forming unit configured to illuminate a corresponding region of the illumination target surface with the illumination light from one of the light emitting devices to form the image;
• and
• a light condensing unit configured to collect the illumination light from each of the light emitting devices and to cause the illumination light to be incident on the illumination target surface, wherein
• the light condensing unit includes a condenser lens array in which a plurality of lens elements are aligned with each other,
• the lens elements are paired with the light emitting devices, respectively,
• each of the lens elements is provided with a light condensing surface to condense the illumination light,
• a z-direction is defined as a direction in which surface vertexes of the light condensing surfaces are connected with the light emitting devices paired with the light condensing surfaces, respectively,
• an x-direction and a y-direction are defined to be orthogonal to each other on a virtual plane orthogonal to the z-direction,
• the pairs of the condenser lens elements and the light emitting devices are aligned in at least one of the x-direction and the y-direction as an alignment direction,
• each of the light condensing surfaces is an anamorphic surface formed in a convex shape in which a curvature in the x-direction and a curvature in the y-direction are different from each other,
• one of the x-direction and the y-direction is set as the alignment direction and the other is set as the other direction,
• the illumination target surface is in a rectangular shape having a dimension La in a direction on the illumination target surface corresponding to the alignment direction and having a dimension Ls in a direction on the illumination target surface corresponding to the other direction,
• an alignment number of pairs of the condenser lens elements and the light emitting devices in the alignment direction is Na,
• La/Na>Ls is satisfied, and
• the curvature in the alignment direction is smaller than the curvature in the other direction.

A head-up display device mounted on a mobile object, the head-up display device configured to project an image on a projection member to display a virtual image and to enable an occupant to visually recognize the image, the head-up display device comprising:

• a plurality of light emitting devices arranged with each other and each configured to emit an illumination light;
• an image forming unit including an illumination target surface, the image forming unit configured to illuminate a corresponding region of the illumination target surface with the illumination light from one of the light emitting devices to form the image;
• and
• a light condensing unit configured to collect the illumination light from each of the light emitting devices and to cause the illumination light to be incident on the illumination target surface, wherein
• the light condensing unit includes a condenser lens array in which a plurality of lens elements are aligned with each other,
• the lens elements are paired with the light emitting devices, respectively,
• each of the lens elements is provided with a light condensing surface to condense the illumination light,
• a z-direction is defined as a direction in which surface vertexes of the light condensing surfaces are connected with the light emitting devices paired with the light condensing surfaces, respectively,
• an x-direction and a y-direction are defined to be orthogonal to each other on a virtual plane orthogonal to the z-direction,
• the pairs of the condenser lens elements and the light emitting devices are aligned in at least one of the x-direction and the y-direction as an alignment direction,
• each of the light condensing surfaces is an anamorphic surface formed in a convex shape in which a curvature in the x-direction and a curvature in the y-direction are different from each other,
• both of the x-direction and the y-direction are set as the alignment direction,
• the illumination target surface is formed in a rectangular shape having a dimension Lx in a direction on the illumination target surface corresponding to the x-direction and a dimension Ly in a direction on the illumination target surface corresponding to the y-direction,
• Nx number of pairs of the condenser lens elements and the light emitting devices are aligned in the x-direction, Ny number of pairs of the condensing lens elements and the light emitting devices are aligned in the y-direction,
• Lx/Nx<Ly/Ny is satisfied, and
• the curvature in the x-direction is greater than the curvature in the y-direction.

A head-up display device mounted on a mobile object, the head-up display device configured to project an image on a projection member to display a virtual image and to enable an occupant to visually recognize the image, the head-up display device comprising:

• a plurality of light emitting devices arranged with each other and each configured to emit an illumination light;
• an image forming unit including an illumination target surface, the image forming unit configured to illuminate a corresponding region of the illumination target surface with the illumination light from one of the light emitting devices to form the image;
• and
• a light condensing unit configured to collect the illumination light from each of the light emitting devices and to cause the illumination light to be incident on the illumination target surface, wherein
• the light condensing unit includes a condenser lens array in which a plurality of lens elements are aligned with each other,
• the lens elements are paired with the light emitting devices, respectively,
• each of the lens elements is provided with a light condensing surface to condense the illumination light,
• a z-direction is defined as a direction in which surface vertexes of the light condensing surfaces are connected with the light emitting devices paired with the light condensing surfaces, respectively,
• an x-direction and a y-direction are defined to be orthogonal to each other on a virtual plane orthogonal to the z-direction,
• the pairs of the condenser lens elements and the light emitting devices are aligned in at least one of the x-direction and the y-direction as an alignment direction,
• each of the light condensing surfaces is an anamorphic surface formed in a convex shape in which a curvature in the x-direction and a curvature in the y-direction are different from each other,
• both of the x-direction and the y-direction are set as the alignment direction,
• the illumination target surface is formed in a rectangular shape having a dimension Lx in a direction on the illumination target surface corresponding to the x-direction and a dimension Ly in a direction on the illumination target surface corresponding to the y-direction,
• Nx number of pairs of the condenser lens elements and the light emitting devices are aligned in the x-direction, Ny number of pairs of the condensing lens elements and the light emitting devices are aligned in the y-direction,
• Lx/Nx>Ly/Ny is satisfied, and
• the curvature in the x-direction is smaller than the curvature in the y-direction.