Laser projection module, depth camera and electronics

Abstract

The invention discloses a laser projection module, a depth camera and an electronic device. The laser projection module includes a laser emitter, a collimation element, a diffraction element, a detection component and a processor. The detection component is arranged on the collimation element and the diffraction element. The processor is used for receiving the electrical signal output by the detection component, judging whether the electrical signal is within the preset range, and determining that the distance between the collimation element and the diffraction element exceeds a predetermined interval when the electrical signal is not within the preset range. The laser projection module, depth camera and electronic device according to the embodiment of the present invention set detection components on the collimation element and the diffraction element, and use the detection component to detect the distance between the collimation element and the diffraction element, and the distance between the two When the change value exceeds the predetermined interval, it is determined that the collimation element and / or the diffraction element has fallen off. At this time, the processor turns off the laser emitter or reduces the emission power of the laser emitter to avoid the danger of excessive laser energy emitted to the user's eyes. question.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a laser projection module, a depth camera and an electronic device. Background technique [0002] Most existing mobile phones are equipped with laser projection modules. The laser projection module includes a laser emitter, a collimation element and a diffraction element. The diffractive element is placed above the collimating element. When the mobile phone is accidentally dropped, the collimation element and diffraction element may fall off, causing the laser emitted by the laser transmitter to exit directly without passing through the collimation element and / or diffraction element. In this way, the energy of the directly emitted laser light is relatively large, which may harm user's eyes. Contents of the invention [0003] Embodiments of the present invention provide a laser projection module, a depth camera and an electronic device. [0004] The laser projection module ...

AI Technical Summary

Problems solved by technology

When the mobile phone is accidentally dropped, the collimation element and diffraction element may fall off, causing the laser emitted by the laser transmitter to exit directly without passing through the collimation element and / or diffraction element. In this way, the energy of the directly emitted laser light is relatively large, which may harm user's eyes

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