CCD universal charge, Chinese full name: charge coupled device. Can be called CCD image sensor, also known as the image controller. CCD is a semiconductor device that converts optical images into electrical signals.
The tiny light-sensitive substances embedded in the CCD are called pixels. CCD is an extremely important part in the camera, it plays the role of converting light into electrical signals, similar to the human eye, so its performance will directly affect the performance of the camera. The CCD acts like film, but it converts light signals into electrical signals. There are many neatly arranged photodiodes on the CCD, which can sense light, and convert the light signal into an electrical signal, which is converted into a digital image signal by external sampling amplification and analog-to-digital conversion circuit.