CNET Crave was impressed by Panasonic HDR sensor presented on ISSCC. The 177x144 pixel image sensor that takes three frames of the same scene in rapid succession.
In one example, the first exposure lasts 1.5us, the second 150us, and the third 15ms. Extra circuitry built into the sensor records the data from the multiple exposures and uses an assortment of electronic capacitors to combine it into a single image that spans a greater dynamic range.
The image can span a dynamic range of 140db at 15fps rate.