How to interpret CCD?

Charge CoupLED Device (CCD) Charge coupled device. A CCD is a semiconductor device that can convert optical images into digital signals. The tiny photosensitive material implanted on the CCD is called a pixel. The greater the number of pixels contained on a CCD, the higher the picture resolution it provides. CCD functions like film, but it converts image pixels into digital signals. CCD is widely used in cameras, digital cameras and scanners, but the dot matrix CCD is used in the camera, which includes x and y directions for capturing planar images, while the scanner uses a linear CCD, which only The x-direction and y-direction scanning are completed by the scanner's mechanical device.