Virtual image display device

A virtual image display device that displays a virtual image superimposed on a foreground view of a vehicle by projecting a display light image to a projection area defined in the vehicle, the virtual image display device comprising:

• a low-frequency information acquisition portion that acquires attitude change information about an attitude change occurring on the vehicle at a low-frequency band;
• a high-frequency information acquisition portion that acquires attitude change information about an attitude change occurring on the vehicle at a high-frequency band, the high-frequency band having a higher frequency than the low-frequency band;
• an image renderer that renders image data of the display light image according to the attitude change information at the low-frequency band, the image data being corrected to reduce misalignment of the virtual image attributed to the attitude change at the low-frequency band;
• a projection optical unit that includes a display surface to display an original image based on the image data, and projects light of the original image, which is displayed on the display surface, as the display light image onto the projection area;
• and
• a display controller that displaces the original image displayed on the display surface based on the attitude change information at the high-frequency band to reduce the misalignment of the virtual image attributed to the attitude change at the high-frequency band.