Vehicle display device

A vehicle display device comprising:

• a housing;
• a display device including a backlight and a light-transmitting plate-shaped display unit, configured to emit display information as display light, visually perceived by an occupant within a vehicle interior as a virtual image, within the housing;
• at least one reflector configured to reflect the display light emitted from the display device within the housing and cause the display light to be projected onto a projection target portion within the vehicle interior through an opening of the housing;
• and
• a control unit configured to control the display light depending on an eye point of the occupant or an eye box that is a range of the eye points that enables the visual perception of the virtual image;
• wherein the backlight is configured to diffuse and distribute light of a light source from an irradiation surface and the light-transmitting plate-shaped display unit is configured to cause irradiation light incident from the irradiation surface to an irradiation target surface to be transmitted and emitted from an emission surface as the display light,
• the light-transmitting plate-shaped display unit is tilted relative to the irradiation surface such that, between the irradiation surface and the reflector arranged in an optical axis direction of the backlight with respect to the irradiation surface, a distance between first edges defining lower edges of the virtual image in a vertical direction on the irradiation surface and the irradiation target surface is greater than a distance between second edges defining upper edges of the virtual image in the vertical direction on the irradiation surface and the irradiation target surface,
• the control unit controls the backlight to make illuminance of the irradiation light to be incident from the irradiation surface to the irradiation target surface higher at the first edge than at the second edge, reducing unevenness in luminance of the display light to be emitted from the emission surface of the light-transmitting plate-shaped display unit,
• the at least one reflector includes a first reflector configured to reflect the display light emitted from the display device and a second reflector configured to reflect the display light reflected by the first reflector and cause the display light to be projected onto the projection target portion through the opening of the housing,
• the irradiation surface and the irradiation target surface are each provided in an arrangement such that one edge in a direction orthogonal to the vertical direction corresponds to the first edge and the other edge in the orthogonal direction corresponds to the second edge,
• the light-transmitting plate-shaped display unit is tilted relative to the irradiation surface such that, between the irradiation surface and the first reflector, a distance between the one edge on the irradiation surface and the one edge on the irradiation target surface is greater than a distance between the other edge on the irradiation surface and the other edge on the irradiation target surface, and
• the control unit controls the backlight to make the illuminance of the irradiation light to be incident from the irradiation surface to the irradiation target surface higher at the one edge than at the other edge.

A vehicle display device comprising:

• a housing;
• a display device including a backlight and a light-transmitting plate-shaped display unit, configured to emit display information as display light, visually perceived by an occupant within a vehicle interior as a virtual image, within the housing;
• at least one reflector configured to reflect the display light emitted from the display device within the housing and cause the display light to be projected onto a projection target portion within the vehicle interior through an opening of the housing;
• and
• a control unit configured to control the display light depending on an eye point of the occupant or an eye box that is a range of the eye points that enables the visual perception of the virtual image;
• wherein the backlight is configured to diffuse and distribute light of a light source from an irradiation surface and the light-transmitting plate-shaped display unit is configured to cause irradiation light incident from the irradiation surface to an irradiation target surface to be transmitted and emitted from an emission surface as the display light,
• the light-transmitting plate-shaped display unit is tilted relative to the irradiation surface such that, between the irradiation surface and the reflector arranged in an optical axis direction of the backlight with respect to the irradiation surface, a distance between first edges defining lower edges of the virtual image in a vertical direction on the irradiation surface and the irradiation target surface is greater than a distance between second edges defining upper edges of the virtual image in the vertical direction on the irradiation surface and the irradiation target surface,
• the control unit controls the backlight to make illuminance of the irradiation light to be incident from the irradiation surface to the irradiation target surface higher at the first edge than at the second edge, reducing unevenness in luminance of the display light to be emitted from the emission surface of the light-transmitting plate-shaped display unit,
• the light source is arranged at a plurality of positions between a first light source position associated with the irradiation light from the first edge of the irradiation surface and a second light source position associated with the irradiation light from the second edge of the irradiation surface,
• the control unit increases luminance of the light source arranged closer to the first light source position in an arrangement direction of the light sources compared to luminance of the light source arranged at the second light source position, making the illuminance of the irradiation light to be incident from the irradiation surface to the irradiation target surface higher at the first edge than at the second edge,
• the at least one reflector includes a first reflector configured to reflect the display light emitted from the display device and a second reflector configured to reflect the display light reflected by the first reflector and cause the display light to be projected onto the projection target portion through the opening of the housing,
• the irradiation surface and the irradiation target surface are each provided in an arrangement such that one edge in a direction orthogonal to the vertical direction corresponds to the first edge and the other edge in the orthogonal direction corresponds to the second edge,
• the light-transmitting plate-shaped display unit is tilted relative to the irradiation surface such that, between the irradiation surface and the first reflector, a distance between the one edge on the irradiation surface and the one edge on the irradiation target surface is greater than a distance between the other edge on the irradiation surface and the other edge on the irradiation target surface, and
• the control unit controls the backlight to make the illuminance of the irradiation light to be incident from the irradiation surface to the irradiation target surface higher at the one edge than at the other edge.