The RX100IV released by Sony in 2016 uses the Exmor RS CMOS sensor with its own DRAM. However, the RX100IV is a 1-inch bottom CMOS sensor, which is not suitable for mobile phones. The size of that CMOS sensor is much larger than that of mobile phones. On February 7, Sony officially announced the development of the first mobile phone CMOS sensor integrated with DRAM. Through the advantages of its own DRAM, it realized high-speed image reading of 1/120 seconds and 1080P @ 1000fps shooting.

Sony said that in the past, the CMOS of mobile phones did not use DRAM cache, and the image reading speed was only 1/30 second. Now, the image reading speed up to 1/120 second can reduce the jelly effect brought by the electronic rolling shutter and reduce the distortion of images. At the same time, high-speed image reading enables mobile phones to capture 1080P video at 1000fps.

Left: The image distortion caused by 1/30 second reading Right: The distortion effect is significantly improved under 1/120 second reading