To switch and display virtual images different from each other in a distance from a driver's eye position to the displayed virtual image without using a movable mechanism.
The data for head up display image is input to a display control circuit 2 from an operation parameter detecting device 8. A display body 1 is formed by horizontally arranging display boards 11a, 11b, 11c at vertical intervals from each other, and the display boards are transparent excluding their display areas D1, D2 and D3. The display control circuit 2 controls each display board to display the displayed image on the plurality of display boards. A backlight light source 7 is mounted at lower parts of the display boards 11a, 11b, 11c, the light of the backlight light source 7 reaches the upper display board, and the outgoing light from each display board penetrates through a louver 41 and enters into a combiner 5. By switching the display board displaying the information, the distance from the driver's eye position to the virtual image can be varied without using the movable mechanism.
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WATANABE HIROSHI
Tetsuro Maki
Maki Reiko