Optical sensor based on floodlighting function and 3D imaging device thereof

Abstract

The invention discloses a 3D imaging device, which comprises a projection module, an optical sensor and a first acquisition module, wherein the projection module is used for projecting a patterned beam; the optical sensor comprises a first light transmitting unit for transmitting a first beam, a second light transmitting unit for transmitting a second beam and a light detection unit for detectingthe first beam to judge the approaching distance of an object; and the first acquisition module acquires a first target image illuminated by the patterned beam when the projection module projects thepatterned beam and acquires a second target image illuminated by the second beam when the second light transmitting unit transmits the second beam. Detection on the approaching degree of the object iscarried out through the first beam. The second beam is acquired by the acquisition module in the 3D sensor for providing floodlighting on the 3D sensor. Fusion and superposition of multiple functionssuch as approaching degree detection and floodlighting imaging can be realized.

Description

technical field [0001] The invention relates to the technical fields of optics and electronics, in particular to a light sensor based on a floodlight function and a 3D imaging device thereof. Background technique [0002] Optical sensors have been widely used in smart terminals such as mobile phones, tablets, computers and other devices. In mobile terminal equipment, the ambient light sensor is used to detect the intensity of ambient light so as to further automatically adjust the brightness of the screen. The proximity sensor can detect whether there is an object approaching the device, especially in mobile phones and other devices. The mobile phone is close to the face, and the proximity sensor can detect this phenomenon to control the screen, such as turning off the screen, to prevent the face from accidentally touching the screen. [0003] 3D sensors will also be applied to smart terminal devices, especially 3D sensors based on structured light technology, which can be ...

AI Technical Summary

Problems solved by technology

[0004] With the increasing demand for the functions of smart devices, the functional requirements for light sensors are also increasing, and traditional single-function light sensors are often difficult to meet the demand.

For proximity sensors, it is often only possible to detect whether close objects are approaching, and the detection distance and range are single

For 3D sensors, they are often composed of projection modules and acquisition modules, which take up a lot of equipment space, but can only provide 3D imaging capabilities; and 3D sensors in the prior art cannot perform flood imaging on targets, so in When performing face recognition at night, it is difficult to achieve high-precision recognition

The increase in demand has led to the mechanical addition of corresponding sensors to smart devices, and the effect achieved is often a simple superposition of functions, which has not achieved the effect of integration and fusion to achieve more functions

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