An 87dB Single Exposure Dynamic Range CMOS Image Sensor with a 3.0um Triple Conversion Gain Pixel
2017 May30 – Jun2
2017 International Image Sensor Workshop (IISW)
A 2M pixel single exposure high dynamic range image sensor utilizing a 3.0m pixel that has 3 kings of conversion gain and a dual-gain single amplifier is presented. With the pixel and the signal chain, intra-scene dynamic range of 87dB has been obtained in a single exposure operation by merging low gain readout signal and high gain readout signal. The image sensor also employs an on-chip linearization function, yielding a 16bit linear signal at 60fps. In this single exposure high dynamic range (SEHDR) approach, no SNR degradation occurs in a whole photo conversion range. Also, it can suppress artifacts from moving objects or time variant of light sources, could appear in the multiple exposure high dynamic range (MEHDR) approach.