Multifunctional lighting module

Abstract

The invention provides a multifunctional lighting module, which comprises a first light source for emitting a first light beam, a second light source for emitting a second light beam, and a diffractive optical element, wherein the wavelength of the first light beam is different from that of the second light beam; the diffractive optical element copies and extends the first light beam and the second light beam; a divergence angle of a first incident beam formed by the first light beam is not smaller than an included angle between adjacent diffraction beams formed after the first light beam passes through the diffractive optical element to achieve floodlighting; the divergence angle of a second incident beam formed by the second light beam is not smaller than an included angle between adjacent diffraction beams formed after the second light beam passes through the diffractive optical element to achieve structured lighting. According to the lighting module, two functions of floodlightingand structured light projection are integrated into one module, so that synchronous lighting of floodlighting and structured lighting is achieved; and meanwhile, the multifunctional lighting module has the characteristics of being small in volume and low in power consumption, and is beneficial to integration into intelligent equipment.

Description

technical field [0001] The invention relates to the field of semiconductor lighting, in particular to a multifunctional lighting module. Background technique [0002] Visual information is gradually becoming an important way for smart devices to obtain information and perceive the world. With the increasing functions of smart devices and the diversification of application scenarios, the demands based on visual information are becoming more and more extensive. For example, functional requirements such as unlocking and payment based on face recognition, gesture and action interaction based on human body information, and these functions also need to have high reliability in different scenarios and under different environmental lighting conditions. In traditional equipment, it is difficult to use cameras to obtain color image information to meet these requirements. The acquisition of visual information based on active lighting, such as infrared images, can improve the reliabilit...

AI Technical Summary

Problems solved by technology

The trend of miniaturization and thinning of smart devices makes it extremely difficult to integrate so many devices

On the one hand, more devices will bring higher power consumption, which will reduce the battery life of smart devices; on the other hand, the integration of multiple devices will greatly increase the requirements for the assembly process, resulting in a decrease in product yield and an increase in production costs.

Images