CCD : charge-coupled device image sensor CCD (Charge Coupled Device). It uses a high-speed semiconductor material, can light into electric charge, Analog to Digital Converters through the chip digital signal, compressed digital signal from the camera after an internal flash memory card or internal hard preservation, I can easily transfer data to computers and computer-based processing tools, according to the needs and the imagination to modify images. CCD many photosensitive units, usually in the millions of pixels as a unit. When the CCD surface irradiated by the light, the photosensitive each unit will charge reflected in the components, All units have photoreceptor signals together, constitute a complete one picture.
CMOS : complementary metal oxide semiconductor CMOS (Complementary Metal-oxide S emiconductor) and the same with the CCD in a digital camera can record changes in the semiconductor light. CMOS manufacturing technology and general computer chip is no difference, mainly using silicon and germanium these two elements caused by the semiconductor, it coexist on the CMOS to bring N (s-) and P (s +) grade semiconductors, These two complementary effect of the current chip can be read into records and images. However, CMOS has a drawback, which is too easily miscellaneous, This is mainly because the early design of CMOS in a fast-changing images, Due to current changes are too frequent and produce overheating phenomenon.
CCD imaging is to the advantage of good quality, but due to complex manufacturing process, with only a handful of firms to be able to master, As a result, the cost of manufacturing high, especially for large CCD, the price is very high. In the same resolution, the CMOS prices cheaper than CCD, But the CMOS image quality as compared to CCD run lower. So far, the vast majority of the market-level and high-end consumer digital cameras use CCD sensors; CMOS sensors, as a low-end products used in some camera head, If Which camera manufacturers asking for too much use of the perturbation of CCD sensors, manufacturers will spare no effort to use as a selling point with all the publicity even dubbed the "digital camera" in name. One time, with CCD sensors into people's judgment grade digital cameras in the world.
CMOS image sensor is one of the advantages of the power consumption than the CCD low, CCD to provide outstanding image quality, and pay a price that is higher the power consumption for the charge-transfer smoothly, Noise reduction required by the pressure differential to improve the transmission effect. But CMOS image sensor for each pixel will be converted into the charge voltage, before the inspectors read its amplified using 3.3 V power supply can be driven, power consumption than the CCD low. CMOS image sensor Another advantage is that with the surrounding integrated circuits, ADC can be integrated with signal processors together, the volume significantly reduced.