| 摘要 |
<p>Disclosed is a projection display device, which has a control unit (1), first and second distance measurement sensors (2a, 2b), a display element (6), and a projection lens (7). The control unit (1), the display element (6) and the projection lens (7) are housed in a housing, and the housing is provided with the surface orthogonally intersecting the optical axis of the projection lens (7), and the first and the second distance measurement sensors (2a, 2b) are provided on the surface. The control unit (1) generates image signals for instructing installation attitude, on the basis of magnitude relationship and differential between the output values of the first and the second distance measurement sensors (2a, 2b), and supplies the image signals thus generated to the display element (6).</p> |
