Vehicle display device

Abstract

A vehicle display device includes a displaying part configured to emit, as display light, display information to be viewed and recognized by an occupant in a cabin as a virtual image, a reflection member configured to reflect the display light emitted from the displaying part to project the display light on a projection target part in the cabin, and a controller configured to control the display light in accordance with a detection eye box representing a detection result of an eye box representing a range of an eye point of the occupant and allowing the virtual image to be viewed and recognized.

What is claimed is: 
     
         1 . A vehicle display device comprising:
 a displaying part configured to emit, as display light, display information to be viewed and recognized by an occupant in a cabin as a virtual image;   a reflection member configured to reflect the display light emitted from the displaying part to project the display light on a projection target part in the cabin; and   a controller configured to control the display light in accordance with a detection eye point representing a detection result of an eye point of the occupant or a detection eye box representing a detection result of an eye box representing a range of the eye point, the eye box allowing the virtual image to be viewed and recognized, wherein   the controller controls the displaying part to adjust an emission angle of the display light from the displaying part toward the reflection member in accordance with the detection eye point or the detection eye box to project the display light reflected by the reflection member at a viewpoint position corresponding to the detection eye point or the detection eye box on the projection target part.   
     
     
         2 . The vehicle display device according to  claim 1 , wherein
 the displaying part includes a back light unit and a display unit having a back face and a front face, the back face allowing emission light of the back light unit to enter, the front face allowing the display light corresponding to incident light from the back face to be emitted toward the reflection member,   the back light unit is provided, to respectively correspond to a plurality of the eye points or a plurality of the eye boxes, with a plurality of light sources respectively allowing the display light at emission angles corresponding to the eye points or the eye boxes to be emitted from the display unit, and   the controller allows the light source corresponding to the detection eye point or the detection eye box to turn on, and allows the light sources corresponding to non-detection eye points other than the detection eye point or non-detection eye boxes other than the detection eye box to turn off to adjust the emission angle of the display light from the display unit toward the reflection member to an emission angle corresponding to the detection eye point or the detection eye box.   
     
     
         3 . The vehicle display device according to  claim 2 , wherein,
 when the displaying part is disposed closer to a rear of a vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a front of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is inverted in vehicle upper and lower directions and projected on the projection target part, or, when the displaying part is disposed closer to the front of the vehicle and a lower of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the front of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member, reflected light from the first reflection member, the reflected light being based on the emission light, is inverted in the vehicle upper and lower directions by the second reflection member and projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is inverted in the vehicle upper and lower directions and projected on the projection target part, the light sources are arranged, in accordance with the eye points or the eye boxes positioned in the vehicle upper and lower directions, in order toward the lower of the vehicle from the light source corresponding to the eye point disposed closer to an upper of the vehicle or the eye box disposed closer to the upper of the vehicle.   
     
     
         4 . The vehicle display device according to  claim 2 , wherein,
 when the displaying part is disposed closer to a front of a vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a rear of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is not inverted in vehicle upper and lower directions, but projected on the projection target part, or, when the displaying part is disposed closer to the rear of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the rear of the vehicle and an upper of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member disposed closer to the front of the vehicle, reflected light from the first reflection member, the reflected light being based on the emission light, is not inverted in the vehicle upper and lower directions by the second reflection member, but projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is not inverted in the vehicle upper and lower directions, but projected on the projection target part, the light sources are arranged, in accordance with the eye points or the eye boxes positioned in the vehicle upper and lower directions, in order toward the upper of the vehicle from the light source corresponding to the eye point disposed closer to the upper of the vehicle or the eye box disposed closer to upper of the vehicle.   
     
     
         5 . The vehicle display device according to  claim 2 , wherein
 the back light unit includes sub light sources each disposed between each two of a plurality of main light sources, the main light sources being disposed at two locations, the main light sources respectively serving as the light sources corresponding to the eye points adjacent to each other or the eye boxes adjacent to each other, and,   when the detection eye point is to be displaced toward the eye point next to the detection eye point or the detection eye box is to be displaced toward the eye box next to the detection eye box, the controller decreases output of the main light source that is turning on in accordance with the detection eye point serving as a current detection eye point or the detection eye box serving as a current detection eye box, increases output of the sub light source disposed between the main light source corresponding to the detection eye point serving as the current detection eye point and the main light source corresponding to the eye point next to the detection eye point or the main light source corresponding to the detection eye box serving as the current detection eye box and the main light source corresponding to the eye box next to the detection eye box, decreases the output of the sub light source when the output of the sub light source reaches a maximum value, and increases the output of the main light source corresponding to the eye point next to the detection eye point, that is, the main light source corresponding to the next detection eye point or the eye box next to the detection eye box, that is, the main light source corresponding to the next detection eye box.   
     
     
         6 . The vehicle display device according to  claim 3 , wherein
 the back light unit includes sub light sources each disposed between each two of a plurality of main light sources, the main light sources being disposed at two locations, the main light sources respectively serving as the light sources corresponding to the eye points adjacent to each other or the eye boxes adjacent to each other, and,   when the detection eye point is to be displaced toward the eye point next to the detection eye point or the detection eye box is to be displaced toward the eye box next to the detection eye box, the controller decreases output of the main light source that is turning on in accordance with the detection eye point serving as a current detection eye point or the detection eye box serving as a current detection eye box, increases output of the sub light source disposed between the main light source corresponding to the detection eye point serving as the current detection eye point and the main light source corresponding to the eye point next to the detection eye point or the main light source corresponding to the detection eye box serving as the current detection eye box and the main light source corresponding to the eye box next to the detection eye box, decreases the output of the sub light source when the output of the sub light source reaches a maximum value, and increases the output of the main light source corresponding to the eye point next to the detection eye point, that is, the main light source corresponding to the next detection eye point or the eye box next to the detection eye box, that is, the main light source corresponding to the next detection eye box.   
     
     
         7 . The vehicle display device according to  claim 4 , wherein
 the back light unit includes sub light sources each disposed between each two of a plurality of main light sources, the main light sources being disposed at two locations, the main light sources respectively serving as the light sources corresponding to the eye points adjacent to each other or the eye boxes adjacent to each other, and,   when the detection eye point is to be displaced toward the eye point next to the detection eye point or the detection eye box is to be displaced toward the eye box next to the detection eye box, the controller decreases output of the main light source that is turning on in accordance with the detection eye point serving as a current detection eye point or the detection eye box serving as a current detection eye box, increases output of the sub light source disposed between the main light source corresponding to the detection eye point serving as the current detection eye point and the main light source corresponding to the eye point next to the detection eye point or the main light source corresponding to the detection eye box serving as the current detection eye box and the main light source corresponding to the eye box next to the detection eye box, decreases the output of the sub light source when the output of the sub light source reaches a maximum value, and increases the output of the main light source corresponding to the eye point next to the detection eye point, that is, the main light source corresponding to the next detection eye point or the eye box next to the detection eye box, that is, the main light source corresponding to the next detection eye box.   
     
     
         8 . The vehicle display device according to  claim 1 , wherein
 the displaying part includes a back light unit and a display unit having a back face and a front face, the back face allowing emission light of the back light unit to enter, the front face allowing the display light corresponding to incident light from the back face to be emitted toward the reflection member,   the back light unit includes a light source, a field lens having an incidence face and an emission face, the emission face allowing light entering the incidence face from the light source to exit toward the display unit, the emission face being a concave, curved face, and a driving part configured to relatively move the field lens relative to the light source to change an emission angle of light from the emission face, and   the controller controls the driving part to relatively move the field lens to a position at which the emission angle of the light from the emission face corresponds to an emission angle corresponding to the detection eye point or the detection eye box to adjust the emission angle of the display light from the display unit toward the reflection member to the emission angle corresponding to the detection eye point or the detection eye box.   
     
     
         9 . The vehicle display device according to  claim 8 , wherein,
 when the displaying part is disposed closer to a rear of a vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a front of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is inverted in vehicle upper and lower directions and projected on the projection target part, or, when the displaying part is disposed closer to the front of the vehicle and a lower of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the front of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member, reflected light from the first reflection member, the reflected light being based on the emission light, is inverted in the vehicle upper and lower directions by the second reflection member and projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is inverted in the vehicle upper and lower directions and projected on the projection target part,   the controller
 controls, when the detection eye point corresponds to the eye point disposed at a reference position or the detection eye box corresponds to the eye box disposed at a reference position, the driving part to relatively move the field lens to a reference lens position at which the emission angle of the light from the emission face corresponds to an emission angle corresponding to the eye point disposed at the reference position or the eye box disposed at the reference position, 
 controls, when the detection eye point corresponds to the eye point disposed closer to an upper of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the upper of the vehicle than the eye box disposed at the reference position, the driving part to relatively move the field lens to a position closer to the upper of the vehicle than the reference lens position to adjust the emission angle of the light from the emission face to an emission angle corresponding to the eye point disposed closer to the upper of the vehicle or the eye box disposed closer to the upper of the vehicle, and 
 controls, when the detection eye point corresponds to the eye point disposed closer to the lower of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the lower of the vehicle than the eye box disposed at the reference position, the driving part to relatively move the field lens to a position closer to the lower of the vehicle than the reference lens position to adjust the emission angle of the light from the emission face to an emission angle corresponding to the eye point disposed closer to the lower of the vehicle or the eye box disposed closer to the lower of the vehicle. 
   
     
     
         10 . The vehicle display device according to  claim 8 , wherein,
 when the displaying part is disposed closer to a front of the vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a rear of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is not inverted in vehicle upper and lower directions, but projected on the projection target part, or, when the displaying part is disposed closer to the rear of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the rear of the vehicle and an upper of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member disposed closer to the front of the vehicle, reflected light from the first reflection member, the reflected light being based on the emission light, is not inverted in the vehicle upper and lower directions by the second reflection member, but projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is not inverted in the vehicle upper and lower directions, but projected on the projection target part,   the controller
 controls, when the detection eye point corresponds to the eye point disposed at a reference position or the detection eye box corresponds to the eye box disposed at a reference position, the driving part to relatively move the field lens to a reference lens position at which the emission angle of the light from the emission face corresponds to an emission angle corresponding to the eye point disposed at the reference position or the eye box disposed at the reference position, 
 controls, when the detection eye point corresponds to the eye point disposed closer to the upper of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the upper of the vehicle than the eye box disposed at the reference position, the driving part to relatively move the field lens to a position closer to a lower of the vehicle than the reference lens position to adjust the emission angle of the light from the emission face to an emission angle corresponding to the eye point disposed closer to the upper of the vehicle or the eye box disposed closer to the upper of the vehicle, and 
 controls, when the detection eye point corresponds to the eye point disposed closer to the lower of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the lower of the vehicle than the eye box disposed at the reference position, the driving part to relatively move the field lens to a position closer to the upper of the vehicle than the reference lens position to adjust the emission angle of the light from the emission face to an emission angle corresponding to the eye point disposed closer to the lower of the vehicle or the eye box disposed closer to the lower of the vehicle. 
   
     
     
         11 . The vehicle display device according to  claim 1 , further comprising:
 a driving part configured to relatively rotate the displaying part relative to a vehicle body, wherein   the displaying part includes a back light unit and a display unit having a back face and a front face, the back face allowing emission light of the back light unit to enter, the front face allowing the display light corresponding to incident light from the back face to be emitted toward the reflection member, and   the controller controls the driving part to relatively rotate the displaying part to a position at which the emission angle of the display light from the display unit toward the reflection member corresponds to an emission angle corresponding to the detection eye point or the detection eye box.   
     
     
         12 . The vehicle display device according to  claim 11 , wherein,
 when the displaying part is disposed closer to a rear of a vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a front of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is inverted in vehicle upper and lower directions and projected on the projection target part, or, when the displaying part is disposed closer to the front of the vehicle and a lower of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the front of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member, reflected light from the first reflection member, the reflected light being based on the emission light, is inverted in the vehicle upper and lower directions by the second reflection member and projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is inverted in the vehicle upper and lower directions and projected on the projection target part,   the controller
 controls, when the detection eye point corresponds to the eye point disposed at a reference position or the detection eye box corresponds to the eye box disposed at a reference position, the driving part to relatively rotate the displaying part to a reference displaying part position at which the emission angle of the display light from the display unit toward the reflection member corresponds to an emission angle corresponding to the eye point disposed at the reference position or the eye box disposed at the reference position, 
 controls, when the detection eye point corresponds to the eye point disposed closer to an upper of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the upper of the vehicle than the eye box disposed at the reference position, the driving part to relatively rotate the displaying part to allow the front face of the display unit to face a position closer to the lower of the vehicle than the reference displaying part position to adjust the emission angle of the display light from the display unit toward the reflection member to an emission angle corresponding to the eye point disposed closer to the upper of the vehicle or the eye box disposed closer to the upper of the vehicle, and 
 controls, when the detection eye point corresponds to the eye point disposed closer to the lower of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the lower of the vehicle than the eye box disposed at the reference position, the driving part to relatively rotate the displaying part to allow the front face of the display unit to face a position closer to the upper of the vehicle than the reference displaying part position to adjust the emission angle of the display light from the display unit toward the reflection member to an emission angle corresponding to the eye point disposed closer to the lower of the vehicle or the eye box disposed closer to the lower of the vehicle. 
   
     
     
         13 . The vehicle display device according to  claim 11 , wherein,
 when the displaying part is disposed closer to a front of a vehicle than the reflection member, the displaying part emits the display light toward the reflection member disposed closer to a rear of the vehicle, and reflected light from the reflection member, the reflected light being based on the emission light, is not inverted in vehicle upper and lower directions, but projected on the projection target part, or, when the displaying part is disposed closer to the rear of the vehicle than a first reflection member serving as the reflection member, a second reflection member is disposed closer to the rear of the vehicle and an upper of the vehicle than the first reflection member, the displaying part emits the display light toward the first reflection member disposed closer to the front of the vehicle, reflected light from the first reflection member, the reflected light being based on the emission light, is not inverted in the vehicle upper and lower directions by the second reflection member, but projected, and reflected light from the second reflection member, the reflected light being based on the projection light, is not inverted in the vehicle upper and lower directions, but projected on the projection target part,   the controller
 controls, when the detection eye point corresponds to the eye point disposed at a reference position or the detection eye box corresponds to the eye box disposed at a reference position, the driving part to relatively rotate the displaying part to a reference displaying part position at which the emission angle of the display light from the display unit toward the reflection member corresponds to an emission angle corresponding to the eye point disposed at the reference position or the eye box disposed at the reference position, 
 controls, when the detection eye point corresponds to the eye point disposed closer to the upper of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the upper of the vehicle than the eye box disposed at the reference position, the driving part to relatively rotate the displaying part to allow the front face of the display unit to face a position closer to the upper of the vehicle than the reference displaying part position to adjust the emission angle of the display light from the display unit toward the reflection member to an emission angle corresponding to the eye point disposed closer to the upper of the vehicle or the eye box disposed closer to the upper of the vehicle, and 
 controls, when the detection eye point corresponds to the eye point disposed closer to a lower of the vehicle than the eye point disposed at the reference position or the detection eye box corresponds to the eye box disposed closer to the lower of the vehicle than the eye box disposed at the reference position, the driving part to relatively rotate the displaying part to allow the front face of the display unit to face a position closer to the lower of the vehicle than the reference displaying part position to adjust the emission angle of the display light from the display unit toward the reflection member to an emission angle corresponding to the eye point disposed closer to the lower of the vehicle or the eye box disposed closer to the lower of the vehicle.