| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vehicle display device capable of highly accurately performing automatic focusing with a simple configuration.SOLUTION: A stripe image J is displayed on a light intensity detection section 270. Light intensity is detected by the light intensity detection section 270 while moving the stripe image J. Transition data of an output signal Q of the light intensity detection section 270 associated with moving amount P is acquired. A difference between a maximum output Qmax and a minimum output Qmin is determined in the transition data of the output signal Q. The position (a back focus BF) of projection means 240 is adjusted so that the difference between the maximum output Qmax and the minimum output Qmin may be maximum.</p> |
