Backside illumination image sensor, operating method thereof, image processing system and method of processing image using the same

摘要

A backside illumination image sensor is provided. The backside illumination image sensor includes a plurality of different types of pixels, each pixel including a photodiode configured to accumulate photogenerated charges corresponding to light incident on a backside of a semiconductor substrate and a transfer transistor configured to transfer the photogenerated charges to a floating diffusion node; and a plurality of transfer lines disposed at a front side of the semiconductor substrate, the plurality of transfer lines connected to a gate of the transfer transistor of a respective one of the pixels, wherein transfer control signals respectively transmitted through the transfer lines produce different effective integration times in the pixels.

主权项

1. An image processing system comprising:
an image sensor configured to convert an optical image signal into electrical image data and output frame data, the image sensor including an analog-to-digital converter and a timing generator, the analog-to-digital converter configured to convert the optical image signal into the electrical image data such that the electrical image data is a digital representation of the optical image signal having a gain associated therewith, and the timing generator is configured to control the gain of the analog-to-digital converter in response to a brightness control signal; and an image signal processor configured to receive the frame data, calculate an average brightness of a frame defined by the frame data, and output the brightness control signal to control a brightness of a next frame based on the average brightness, such that the brightness of a next frame data output by the image sensor is adjusted in response to the brightness control signal.