RE: Excuse me12 Oct 2020 12:07
Terry, thanks for the links.
Interesting comments from OmniVision in the electronic design article re: DMS, ADAS and ASIL, particularly in relation to the interview with Ross Jatou from ON Semi...
What are the design challenges for driver state monitoring, as well as in-cabin passenger monitoring, and how does OmniVision address them?
For the DMS, it’s about four things: global shutter (GS), high near-infrared (NIR) quantum efficiency (QE) in the 940-nm wavelength, small size, and low power. At OmniVision, we have a full range of GS image sensors from VGA to 2MP that can meet the needs for driver monitoring. Another trend is that GS image sensors are being integrated as part of an ADAS system, so having ASIL functions is very important, and our 2MP GS platform is the first to add ASIL features. Adding our Nyxel technology to this product range, with the industry’s best QE, then becomes a game changer for this application area for this application area.
In-cabin applications are different than DMS in that they don’t need a global shutter image sensor. Here, a rolling shutter is more than adequate. For cabin monitoring, the key is being able to provide an RGB image for viewing, an enhanced image at night, and an image for machine-vision processing (Fig. 2). To achieve these requirements, it’s necessary to use RGB-IR technology, which applies a different CFA over the pixels to capture both RGB and IR.
How are you seeing this technology being used in automotive applications? And what does it mean for the designers?
Our Nyxel technology is very exciting and can be a game changer for some automotive applications. For example, adding Nyxel to global shutter sensors can bring big benefits to the DMS application space (Fig. 3). It can increase the QE from about 12% to 40% at 940 nm, which is a massive improvement. This gives the system designer much more flexibility and can reduce the power consumption of the LEDs in the system.
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