Abstract: A method of adjusting a vehicle display device includes a process of calculating a first correction value by performing a first inspection on a vehicle display device and writing the same in a nonvolatile memory, and a process of calculating a second correction value by performing a second inspection and writing the same in the nonvolatile memory. In the first inspection, the vehicle display device is installed on an inspection table and projects an image on a windshield for inspection, the first correction value is calculated based on the positional displacement in an image horizontal direction at a time of changing, in a vertical direction, a projection position of the image. In the second inspection, the vehicle display device projects an image on a windshield, the second correction value is calculated based on the positional displacement in the image horizontal direction at a time of changing.

Abstract: A display device for a vehicle includes: a display, a polarization switching unit, a reflector, and a controller. The polarization switching unit includes a wave plate that can cause emission light of the display to be emitted while changing a polarization direction thereof, and a drive device that uses an electric motor as a driving source and can rotate the wave plate between a position of not using polarizing sunglasses and a position of using polarizing sunglasses. When a command is given to switch a required visual recognition mode to the mode of not using polarizing sunglasses or the mode of using polarizing sunglasses, the controller supplies an exciting current to the electric motor to rotate the wave plate to the rotational position of the required visual recognition mode, and interrupts the exciting current flowing through the electric motor thereafter.

Abstract: A vehicle display device includes an output unit that outputs output light of display information to be visually recognized as a virtual image by an occupant in a vehicle cabin, a reflector that directly or indirectly receives the output light, and reflects the output light toward an eye box indicating a region in which the occupant can visibly recognize the virtual image, and a controller that controls an operation of the output unit. The output unit includes a display unit that emits the display information as display light, a turning-back mirror that reflects, as the output light, the display light emitted from the display unit, a holding member that holds the display unit and the turning-back mirror without changing relative positions of the display unit and the turning-back mirror, and a drive mechanism that can reciprocate the holding member along an optical axial direction of the turning-back mirror.

Abstract: A backlight unit includes a light source; a condensing unit that condenses light emitted from the light source; and a diverging unit that diverges the light entering from the condensing unit and that emits the light toward an image display unit of a light transmission type in a head-up display device. For example, the diverging unit is a lens in which both surfaces of an incident surface into which the light from the condensing unit enters as well as an emission surface from which the light is emitted toward the image display unit, are concave surfaces.

Abstract: A head-up display device includes a housing, a reflecting member, a projection light emitting unit, and a vibration transmitting member. The housing is fixed to a vehicle. The reflecting member is rotatably supported by the housing and is held at a rotation position. The projection light emitting unit projects projection light corresponding to information onto a window of the vehicle through the reflecting member. The vibration transmitting member is provided between the housing and the reflecting member and has elasticity. The vibration transmitting member is fixed to the housing and makes contact with the reflecting member in an elastically compressed state in an entire rotatable range of the reflecting member.

Abstract: A backlight unit includes a light source; a condensing unit that condenses light emitted from the light source; and a diverging unit that diverges the light entering from the condensing unit and that emits the light toward an image display unit of a light transmission type in a head-up display device. For example, the diverging unit is a lens in which both surfaces of an incident surface into which the light from the condensing unit enters as well as an emission surface from which the light is emitted toward the image display unit, are concave surfaces.

Abstract: A head-up display device includes a housing, a reflecting member, a projection light emitting unit, and a vibration transmitting member. The housing is fixed to a vehicle. The reflecting member is rotatably supported by the housing and is held at a rotation position. The projection light emitting unit projects projection light corresponding to information onto a window of the vehicle through the reflecting member. The vibration transmitting member is provided between the housing and the reflecting member and has elasticity. The vibration transmitting member is fixed to the housing and makes contact with the reflecting member in an elastically compressed state in an entire rotatable range of the reflecting member.