Laser projection modules and methods for detecting fracture thereof, depth cameras and electronic devices
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsJian BAI, Jie LYU, Xueyong ZHANG
Life of this patent
Estimating the term…
Abstract
A laser projection module (100) and a method for detecting a fracture thereof, a depth camera (1000) and an electronic device (3000). The laser projection module (100) includes a laser emitter (10) and an optical assembly (80). The laser emitter (10) is configured to emit laser light. The laser light passes through the optical assembly (80) to form a laser pattern.
Claims20
A laser projection module, comprising:
- a laser emitter, configured to emit laser light;
- and
- an optical assembly, wherein the laser light passes through the optical assembly to form a laser pattern.
An electronic device, comprising:
- a laser projection module comprising:
- a laser emitter, configured to emit laser light;
- and
- an optical assembly, wherein the laser light passes through the optical assembly to form a laser pattern, wherein the optical assembly comprises:
- a collimating element, configured to collimate the laser light;
- and a diffractive element, configured to diffract the laser light collimated by the collimating element to form the laser pattern, wherein the collimating element and/or the diffractive element is provided with a transparent conductive film, a conductive electrode is disposed on the transparent conductive film, and the conductive electrode is configured to output an electrical signal after being energized;
- and;
- an image collector, configured to collect the laser pattern projected by the laser projection module into a target space;
- and
- a processor, configured to obtain the electrical signal, to determine whether the electrical signal is within a preset range, and to determine fracture of the collimating element and/or the diffractive element in response to the electrical signal being not within the preset range, and to process the laser pattern to obtain a depth image.
A method for detecting a fracture of a laser projection module, wherein the laser projection module comprises a laser emitter, a collimating element and a diffractive element, the laser emitter is configured to emit laser light, the collimating element is configured to collimate the laser light, the diffractive element is configured to diffract the laser light collimated by the collimating element to form a laser pattern;
- a transparent conductive film is formed on the collimating element and/or the diffractive element, and a conductive electrode is disposed on the transparent conductive film, and the conductive electrode is configured to output an electrical signal after being energized;
- or
- the collimating element and/or the diffractive element comprises conductive particles doped in the collimating element and/or the diffractive element, the conductive particles form a conductive path, the conductive path is configured to output an electrical signal after being energized;
- the method comprises:
- obtaining the electrical signal output by the conductive electrode or the conductive path after being energized;
- determining whether the electrical signal is within a preset range;
- and
- determining the fracture of the collimating element and/or the diffractive element in response to the electrical signal being not within the preset range.
Dependencies are inferred from the claim text.