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Another Quad Pixel AF sensor patent application
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Another Quad Pixel AF sensor patent application

It stands to reason as Canon perfects it's smaller design rule processes necessary for ADC on sensor and also for DPAF (Dual Pixel Auto Focus) sensors in general, that they look to improve the vertical orientation auto focus of DPAF sensors.

One way of doing this is via Quad pixel AF, this is another patent application dealing with the fundamentals.

One problem with both Dual Pixel AF and now, Quad Pixel AF sensors is that each time you "split" a pixel, you lose some efficiency becuase you have to actually split the darn pixel up.

This is another patent application (Japan Patent Application 2017-228829) that improves the function of Quad Pixel AF sensors by optimizing the signal output from each quad pixel.

Could this be the next generation of sensors from Canon? Quite possibly, however, there's alot of fundamental tech that canon has to implement to make these sensors, and it would surprise me that the release of quad pixel sensors wouldn't also see the introduction of a stacked sensor.



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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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