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    • 7. 发明申请
    • LASER SCANNING PROJECTION DEVICE WITH EYE DETECTION UNIT
    • 具有眼睛检测单元的激光扫描投影设备
    • WO2009031094A1
    • 2009-03-12
    • PCT/IB2008/053538
    • 2008-09-02
    • PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHKONINKLIJKE PHILIPS ELECTRONICS N.V.RITZ, ArndWEBER, AchimMOENCH, HolgerHOVING, Willem
    • RITZ, ArndWEBER, AchimMOENCH, HolgerHOVING, Willem
    • H04N9/31
    • H04N9/3194H04N9/3129
    • The present invention relates to a projection device comprising at least one laser light source (2) and a scanning unit (7) arranged for scanning an external projection area (12) within a projection cone (11) with a laser beam (10) emitted from said laser light source (2). The projection device further comprises a detection unit (13) designed to detect the presence of an eye (23) in the projection cone (11) and a control unit (21) designed to lower a projection intensity of the laser beam (10) when an eye (23) is detected. The control unit (21) lowers the intensity only as long as the laser beam (10) scans over a limited region (24) around a detected position of the eye (23) and maintains the projection intensity of the laser beam (10) outside of said limited region (24) in said projection cone (11). The projection device allows a reliable protection of the eye of a person looking directly into the laser beam while the projected image is not significantly disturbed in such a case.
    • 本发明涉及一种投影装置,其包括至少一个激光光源(2)和扫描单元(7),扫描单元(7)被布置成用发射的激光束(10)扫描投影锥体(11)内的外部投影区域(12) 来自所述激光光源(2)。 投影装置还包括设计成检测投影锥体(11)中的眼睛(23)的存在的检测单元(13)和设计成降低激光束(10)的投影强度的控制单元(21) 检测到眼睛(23)。 只要激光束(10)围绕眼睛(23)的检测位置在有限区域(24)上扫描,控制单元(21)就降低强度,并将激光束(10)的投射强度保持在外 在所述突出锥体(11)中的所述限制区域(24)。 在这种情况下,投影装置允许可靠地保护直接进入激光束的人的眼睛,同时投影图像不被显着地干扰。