Title:
LASER BEAM SCANNING SYSTEM WITH PHASE CALIBRATION AND COMPENSATION
Document Type and Number:
WIPO Patent Application WO/2023/151442
Kind Code:
A1
Abstract:
A laser beam scanning system (100) includes a light source (110), a projection (130), a micro-mirror (120), a controller (150), and a light detection module (140). The light source (110) generates a laser beam, and the micro-mirror (120) deflects the laser beam to create a scan trajectory on the projection (130). The controller (150) generates a control signal and a drive signal. The control signal turns the laser beam on and off, and the drive signal controls scan movements of the micro-mirror (120). The light detection module (140) is placed at a margin of the projection (130). The light detection module (140) includes a photo sensor (341) underneath a light-blocking top layer (342) having a slot (343) to expose the photo sensor (341). The photo sensor (341) generates a detection pulse in response to detection of the laser beam in one or more segments of the scan trajectory. The controller (150) is operative to measure a detection pulse width in clock cycles.
Inventors:
CHIEN LEO MING TZ (CN)
DEE CHIEN-HUEI (CN)
TSENG JUNG-KUAN (CN)
DEE CHIEN-HUEI (CN)
TSENG JUNG-KUAN (CN)
Application Number:
PCT/CN2023/071432
Publication Date:
August 17, 2023
Filing Date:
January 09, 2023
Export Citation:
Assignee:
FIRST INT COMPUTER INC (CN)
International Classes:
G02B26/10; G02B27/01; H04N3/08
Foreign References:
| US7059523B1 | 2006-06-13 | |||
| US20040032482A1 | 2004-02-19 | |||
| JP2007114518A | 2007-05-10 | |||
| CN113661428A | 2021-11-16 |
Attorney, Agent or Firm:
LECOME INTELLECTUAL PROPERTY AGENT LTD. (CN)
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