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Why has VCSEL become the focus of consumer electronics?
Source：
Time：2020-08-31 20:12:31
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The appearance of the 3D sensing module on the iphone X makes the core zero group VCSEL (Vertical Cavity Surface Emitting Laser) in the 3D sensing module the focus, and the application market of VCSEL has shifted from industry to commercial and consumer.
With the continuous development of the intelligent information world, VCSELs are playing an increasingly important role in the field of consumer electronics (such as smart phone face recognition, sweeping robots, drone avoidance, camera fill light, smart wearable devices, etc.).
VCSEL is a basic component of consumer electronics visual imaging and 3D sensing. It is estimated that in 2020, smartphones alone will contribute more than US$2 billion in revenue to the VCSEL market.
Technical analysis of VCSEL
Compared with infrared LEDs with low resolution and low electro-optical conversion efficiency, infrared lasers use a resonant cavity design, which has the advantages of small light divergence angle, high photoelectric conversion efficiency and fast data transmission speed.
Compared with edge-emitting lasers (EEL), VCSELs have the potential of lower critical current, the luminous beam has circular symmetry and high modulation frequency.
Consumer Electronics-3D Sensing
Compared with traditional cameras, 3D Sensing cameras can not only obtain planar images, but also obtain depth information of the subject, that is, three-dimensional position and size information.
The 850nm/940nm 3D ToF VCSEL diodes of Xinliang Smart with Diffuser, power from 200mW-4W, can provide light source for 3D TOF sensing, structured light flood light, 3D photography, face recognition and other application scenarios.
Consumer Electronics-Proximity Sensing
Infrared proximity sensing is a technology that enables an electronic device to quickly sense the proximity of a person (or object) without actually touching the person (or object).
Xinliang Smart 8mW, 850nm/940nm VCSEL diodes of tens of milliwatts, PIN PD and transceiver components are used as short-distance proximity sensors, applied to screens, reducing power consumption, small size, and easy to integrate; applied to TWS Bluetooth The earphones rely on VCSEL to detect the in-ear/out-ear of wireless earphones to realize the function of automatically playing music when the earphone is inserted into the ear, and automatically pause after being removed, and extend the battery life after a single charge.
