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Which technology is more suitable for smartphones, ToF sensor or structured light?

Which technology is more suitable for smartphones, ToF sensor or structured light? In fact, ToF sensor and structured light are both three-dimensional imaging technologies, which can also achieve face unlocking in a no-light environment, and can also make financial security-level payments. In contrast, the advantage of the ToF sensor is that the module is simple. In a smartphones with a small internal space, the ToF sensor occupies a smaller space, and can even be used in a hole-digging screen; the ToF sensor has higher accuracy at close range, This makes the ToF sensor also very suitable for face recognition, and its security level makes many smartphones directly cancel fingerprint recognition. ToF sensor takes up less space and costs less, making it ideal for mobile phone applications.In addition to short-range applications, ToF sensor is also very suitable for long-distance detection, which makes its application scenarios wider, whether it is placed in front of or behind the mobile phone. So far, structured light is only used for face recognition, and there is no mobile phone that uses structured light for rear. In contrast, ToF sensor may be better. As far as smartphones identification is concerned, whether it is entry or daily unlocking, face recognition is more convenient than fingerprint recognition.Fingerprint recognition, as the only reliable biometric identification method for most smartphones, has shut out some elderly people who pursue simplicity because of the need for multiple entries; while 2D face recognition is fast, but cannot guarantee security. So from the current point of view, ToF sensor face recognition would be a relatively low-cost 3D face recognition solution.

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