CCD vs. CMOS Imagers: How They Work in Camera Phones
CCD (charge coupled device) and CMOS image sensors are both used for digital image capture.
CCD based image sensors tend to consume more power, have higher heat dissipation and are frequently larger, sometimes requiring multi chip solutions. This is due to their inherent charge coupled design. However, they also tend to be very good in image quality and are the prevalent technology for digital still cameras and camcorders today.
CMOS sensors are much smaller, consume less power but have historically offered poorer image quality than CCD, principally because each pixel in a CMOS image sensor uses some of the area on the chip to perform a charge to voltage conversion. However, because CMOS sensors are fabricated utilizing the highly prevalent CMOS manufacturing process they are much less expensive than CCD based image sensors.
Both technologies have their advantages and disadvantages. This article describes how each functions and what strengths and weaknesses they have with regard to the requirements of the super high growth camera phone market.
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