Introduction to Charge Coupled Devices
A charge-coupled device (CCD) is a silicon chip used to detect light, which generates and controls changes in a semiconductor potential well by a clock pulse voltage, and realizes a solid-state electronic device that stores and transfers charge information.
The charge-coupled device was invented in 1969 by W.S. Boyle and G.E. Smith of Bell Labs, USA, and consists of a set of regularly arranged metal-oxide-semiconductor (MOS) capacitor arrays and input and output circuits. Charge-coupled devices use a charge amount to represent dynamic shift registers of different states, which are more sensitive to detecting changes in light than conventional negative films.