METHOD OF ADJUSTING VEHICLE DISPLAY DEVICE, AND VEHICLE DISPLAY DEVICE

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.