Ha! I'm actually starting to understand some of this stuff myself!
It's pretty cool though. Hoya has gotten a lot of patents issued the last few years, many related to the sweet camera functions we are seeing (will see???) in Pentax bodies.
-SR
-Dust imaging/alert
-level indicator/correction
-DC Motor
-lens communication
-AF motors
-adjustable AF module mount
- the + in SAFOX for color temp sensing
There is a 2009 US patent (7496290) which apparently shows and describes the 3x3 SAFOX AF grid and functionality. {check that out then 2011/0111655 which is Canon's latest
)
Even better though - there are recent patents for AF (and other) technologies that should address common complaints...
A 2009 patent describes a radically different style of AF sensor (3x7 array).
One from 2011 describes a 5x9 system based on the 3x7 (more points with line sensors broken up into small areas, more sensor signal control & manipulation)
A 2010 patent for multi-use colorimetric sensor (is this the current "+"? WB/Color/EV sensor detects object light color wavelength differences which produce AF errors in phase detection AF).
A patent for AF SR (what good is compensating the image sensor if the image on the AF sensor is blurry?)
A 2011 patent for parallel AF line sensors (allow for more accurate reading of angled objects).
The K30 AF has a CA corrective lens and new algorithms.
...
Would be very cool to see these and/or other improvements in the next cameras!