Multi-proximity detection optical sensor

Abstract

The invention discloses an optical sensor, which comprises a base, a first light emitting unit, a second light emitting unit and a light detection unit, wherein the first light emitting unit is arranged on the base for emitting first beams; the second light emitting unit is arranged on the base for emitting second beams; the light detection unit is arranged on the base for detecting the first beams to judge the first proximity distance of an object and detecting the second beams to judge the second proximity distance of the object, and the first proximity distance is smaller than the second proximity distance. Through arranging the two light emitting units in the optical sensor, the first beams emitted by the first light emitting unit are used for detecting the near proximity, the second beams emitted by the second light emitting unit are used for detecting the far proximity, function superposition is realized on the basis of not increasing extra devices, and multi-proximity detectioncan be realized.

Description

technical field [0001] The invention relates to the technical fields of optics and electronics, in particular to a multi-proximity detection light sensor. 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 used to perform three-dimensional mea...

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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