Canon Patent Application: High Speed DPAF sensor

One of the current problems with DPAF sensors is that they must be read twice, once for AF information and another time for image information.  This dual reading takes time and slows down how fast the sensor can normally operate.

This patent application explores ways of reading both the AF information and the image information in parallel, making the entire step much faster than reading AF than image one after another.

How this sensor does it is a bit of magic.  Every embodiment uses some form of stacked sensors.  On particular embodiment uses a three layer stacked sensor.  The top layer is for the pixels themselves, the second layer is to add the two halfs of the pixels together for image information, and the third layer is to compute AF information and contains memory as well, necessary to do both operations at the same time.  Even though it's not mentioned, this would also be "near global shutter" capable.

Something like this would be hugely useful to future EOS RF camera bodies, and it's good to see Canon investigating and researching this further.

Japan Patent Application 2018170768

Richard CanonNewsRichard CanonNews

Richard has been using Canon cameras since the 1990s, with his first being the now legendary EOS-3. Since then, Richard has continued to use Canon cameras and now focuses mostly on infrared photography. Richard is the founder and editor of CanonNews since 2017, and has worked as a writer on CanonRumors and other websites in the past.

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