Driver sensing systems mainly consist of image monitoring, biometric and alcohol detecting devices, with image monitoring devices being the most important because it is easy and quick to detect abnormal conditions about drivers from images, Digitimes Research said.

Image monitoring devices mainly consist of infrared (IR) LED sensors and camera modules. For example, Osram Opto Semiconductors adopts IR LED chips, with wavelength of 940nm for IR LED sensors, which can monitor details of drivers' facial expression even in the dark.

Since drivers' behavior and conditions face a large variation, driver sensing systems are expected to be integrated with artificial intelligence and deep learning to enhance precision of judgment.