| 摘要 |
<p>The invention relates to a method for operating a position detection arrangement, an optical unit for a position detection arrangement and a position detection arrangement for a head position (80) of a driver. The arrangement is characterized by an optical unit (20) comprising at least one light source (32, 32r, 321) providing backlight directed to the driver and a mask device (40) for blocking the light of the at least one light source (32, 32r, 321) when being arranged in an optical path (22, 22r, 221) between the at least one light source (32, 32r, 321) and the driver's head position (80); a manipulator device (50) for accomplishing a relative movement between the at least one light source (32, 32r, 321) and a blocking member (42) of the mask device (40); a computing unit (60) coupled to the optical unit (20) for capturing a distance (70) between at least one of (a) two or more dedicated light-source positions (72, 74), (b) two or more dedicated blocking member positions (42rp, 42Ip), and/or for calculating a position (80) of the driver's head based on an angle (a) between the positions (72, 74) and the driver's head position (80).</p> |
