Rambus Oversampled Pixel Patent Application

A 71-page long Rambus patent application US20150070544 "Oversampled image sensor with conditional pixel readout" by Craig Smith, Michael Guidash, Jay Endsley, Thomas Vogelsang, and James Harris expands the previously published applications (1, 2, 3) to 4T-like pixels with added transistor for a conditional reset. There are two versions, both featuring an additional "transfer-enable transistor 253", both able to operate in a partial charge transfer mode:

IP stands for "Image Pixel"