| 摘要 |
PROBLEM TO BE SOLVED: To provide a head-up display in which an adjustment mechanism of a virtual image position is achieved with a simple configuration and can be miniaturized.SOLUTION: The head-up display includes a power transmission unit 2b comprising a gear mechanism which converts rotation of a DC motor 2d to a driving force to vary a turning angle of a curved surface mirror 2a and has such a speed reduction ratio set thereto that the curved surface mirror 2a is turned at a preliminarily determined unit turning angle when an adjustment button 3 is operated in a time shorter than a set time. If the difference between a turning position of the curved surface mirror 2a detected by a sensor 2c at a first timing of the completion of operation of the adjustment button 3 and a turning position of the curved surface mirror 2a detected at a second timing after elapse of an overrun determination time from the first timing is equal to or larger than a threshold B, turning of the curved surface mirror 2a is controlled so that the curved surface mirror 2a is in the turning position detected at the first timing. |
