Charge Coupled Device (CCD) is a kind of silicon devices which contain an array of potential wells created through a series of column implants and electrodes. CCD is often used in Cameras and function like a memory device to record the variation of light.
In addition, the basic CCD chip unit, picture cell, is pixel. The numbers of Pixel represent the amount of Optical Device which also means the resolution of Camera. Furthermore, the surface of optical device, arranged in matrix order, possesses an ability which can keep electric charge. When detecting optical signal, those optical devices will transform a light pattern (image) into an electric charge pattern (an electronic image).
Similar to CCD, Complementary Metal-Oxide Semiconductor (CMOS) is a optical memory device as well. It is constructed by Silicon and Germanium elements which result this semi-conductor possess negative and positive electronic poles. This combination consequence an outcome and we call it, ˇ§compensation effectˇ¨.
Both CCD and CMOS technologies have their own advantages and disadvantages. CMOS sensors are easier, less costly to manufacture, and are generally used for low-end applications. They need less power consumption than CCD sensors. On the other hand, CCD sensors are usually higher quality products with more accurate functionality.
|
