Omnnivision Splits Pixel

It was brought to my attention that Omnivision's PR from a week ago mentions so-called "split pixel":

"The OmniVision OV10620 HDR sensor incorporates a unique split pixel design that operates using different exposure times to allow one part of the pixel to capture dark tones within an image, and the other part to capture bright tones. The two images are then merged using proprietary signal processing technology ensuring the visibility of entire scenes in high-contrast environments. The OV10620 is capable of performing at a dynamic range of up to 110dB in either color or black and white."

Anybody can shed some light on this pixel work? Any published patents on it?

Thanks to OA for bringing this to my attention.