Title:
LASER PROJECTION MODULE, DEPTH CAMERA, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/165862
Kind Code:
A1
Abstract:
A laser projection module (100), a depth camera (1000), and an electronic device (300). The laser projection module (100) comprises a laser emitter (10), a collimation element (20), a diffraction element (30), a detection assembly (40), and a processor (70). The laser emitter (10) is used for emitting laser. The collimation element (20) is used for collimating the laser. The diffraction element (30) is used for diffracting the laser collimated by the collimation element (20) to form a laser pattern. The detection assembly (40) is disposed on the collimation element (20) and/or the diffraction element (30) and used for outputting an electrical signal. The processor (70) is connected to the detection assembly (4), and used for receiving the electrical signal and detecting according to the electrical signal whether the collimation element (20) and/or the diffraction element (30) is damaged. Or the detection assembly (40) is used for detecting whether the distance between the collimation element (20) and the diffraction element (30) is within a predetermined interval. The present invention avoids damages to a user's eyes when the apparatus is abnormal.
Inventors:
BAI JIAN (CN)
TANG CHENG (CN)
TANG CHENG (CN)
Application Number:
PCT/CN2019/072561
Publication Date:
September 06, 2019
Filing Date:
January 21, 2019
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
G02B7/00; G03B15/02; G02B27/42; G03B15/08; G03B21/14
Domestic Patent References:
| WO2017149092A2 | 2017-09-08 |
Foreign References:
| CN108388072A | 2018-08-10 | |||
| CN108490630A | 2018-09-04 | |||
| CN108508687A | 2018-09-07 | |||
| CN107942612A | 2018-04-20 | |||
| CN107608167A | 2018-01-19 | |||
| CN107515503A | 2017-12-26 | |||
| CN107102506A | 2017-08-29 | |||
| CN101501442A | 2009-08-05 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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