公开(公告)号：EP4001996A2

公开(公告)日：2022-05-25

申请号：EP21205395.3

申请日：2021-10-28

Applicant: STMicroelectronics Ltd

Inventor： DOMNITS, Alex ,  ERLICH, Shlomy

IPC: G02B27/01 ,  G02B27/09 ,  G02B27/10 ,  G02B26/08 ,  G02B26/10 ,  H04N9/31 ,  G02B27/14

Abstract: A compact optical package (10) includes an RGB laser unit (12) containing red, green, and blue laser diodes ((12a-12c)) within a single package, with three lenses (14a-14c) adjacent the RGB laser unit to collimate red, green, and blue laser light emitted by the red, green, and blue laser diodes. A beam combiner (16) combines the red, green, and blue laser light into a single RGB laser beam (33) and also outputs a lower power feedback beam. The optical package also includes a movable mirror apparatus (20, 24), and a fixed folding mirror (22) upon which the single RGB laser beam output by the beam splitter impinges and reflects the single RGB laser beam toward the movable mirror apparatus (20, 24). The movable mirror apparatus (20, 24) directs the single RGB laser beam (33) through an exit window (24) and to scan the single RGB laser beam in a scan pattern to form at least one desired image on a target.

公开(公告)号：EP4152744A1

公开(公告)日：2023-03-22

申请号：EP22195417.5

申请日：2022-09-13

Applicant: STMicroelectronics Ltd ,  STMicroelectronics S.r.l.

Inventor： DOMNITS, Alex ,  ROTH, Elan ,  TERZI, Davide ,  MOLINARI, Luca ,  BOSCHI, Marco

IPC: H04N9/31

Abstract: A scanning laser projector (40) includes an optical module (10) and projection engine (41). The optical module includes a laser generator outputting a laser beam, and a movable mirror (20, 24) scanning the laser beam across an exit window defined through the housing in a scanning pattern wider than the exit window such that the laser beam is directed through the exit window in a projection pattern that is smaller than and within the scanning pattern. A first light detector (18a, 18b) is positioned about a periphery of the exit window such that as the movable mirror scans the laser beam in the scan pattern, at a point in the scan pattern where the laser beam is scanned across an interior of the housing and not through the exit window, the laser beam impinges upon the first light detector. The projection engine (41) adjusts driving of the movable mirror based upon output from the first light detector (18a, 18b).