The company patent US8797434 "CMOS image sensor having wide dynamic range and sensing method thereof" by Jawoong Lee, Jun Hee Cho, Jong Beom Choi and a more recent patent application US20150189145 with the same name explain:
"The present invention provides a CMOS image sensor and a sensing method thereof, capable of embodying wide dynamic range by simultaneously outputting two or more output signals corresponding to different exposure integration times in a pixel without any need of additional external memories outside the pixel and with relatively simple image processing."
