At ISSCC 2017, Canon announced that they have developed a CMOS image sensor that supports the “global shutter (GS)” technology and has a dynamic range of 111dB. Nikkei Technology has given a more in-depth breakdown of this new global shutter.
From Nikkei Technology:
Conventional CMOS sensors use the “rolling shutter” technology, which exposes lines of pixels in series (one after another). It causes a time lag when reading signals from each pixel, sometimes distorting the image of a fast-moving subject.
On the other hand, the [global shutter] technology exposes all the pixels at the same time and is suited for taking images of fast-moving subjects. However, its dynamic range is narrow. To solve this problem, Canon made two major improvements.
First, within time for one exposure, the value calculated by accumulating the electric charge from the light-receiving part (PDs: photo diodes) twice is stored in the memory and processed. To read out the electric charge at a high speed, Canon used its own A-D (analog-digital) converter called “SSDG-ADC”. The converter was announced at ISSCC 2014. Read the full article
As Canon has already developed this global shutter technology, we will sooner or later see this technology using in the future Canon cameras.