Title:
LASER PROJECTION DEVICE AND HUMAN EYE PROTECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/022481
Kind Code:
A1
Abstract:
A laser projection device and a human eye protection method. A signal detection circuit (20) in the laser projection device is used for detecting a target object, and for sending a detected detection signal to a control circuit (30). The control circuit (30) is used for sending a secondary screen driving signal to a secondary screen driving circuit (40) if it is determined, according to the detection signal, that the target object is located in a target area, and sending a turn-off signal to a laser device driving circuit (60). The secondary screen driving circuit (40) is used for driving, in response to the secondary screen driving signal, a secondary screen (50) to display prompt information, the prompt information being used for giving a prompt indicating that the target object moves out of the target area. The laser device driving circuit (60) is used for turning off a laser device (70) in response to the turn-off signal. Therefore, a laser emitted by the laser device (70) can be prevented from causing damage to human eyes.
Inventors:
WU KAI (CN)
CHEN XU (CN)
CHEN XU (CN)
Application Number:
PCT/CN2021/108537
Publication Date:
February 03, 2022
Filing Date:
July 27, 2021
Export Citation:
Assignee:
HISENSE LASER DISPLAY CO LTD (CN)
International Classes:
G03B21/20; G03B31/00; H01S5/042
Foreign References:
| CN112687215A | 2021-04-20 | |||
| CN112687216A | 2021-04-20 | |||
| CN112616046A | 2021-04-06 | |||
| JP2004070298A | 2004-03-04 | |||
| CN1209935A | 1999-03-03 | |||
| JP2009244633A | 2009-10-22 | |||
| KR20070102061A | 2007-10-18 | |||
| CN107770466A | 2018-03-06 | |||
| CN1503924A | 2004-06-09 |
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
Download PDF: