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  • Image sensor in the security surveillance cameras in the application

        Image sensors,security surveillance cameras is an important component part. According to the different components can be divided into CCD (ChargeCoupledDevice, charge-coupled device) and CMOS (ComplementaryMetal-OxideSemiconductor, metal oxide semiconductor) into two categories.

        Image sensors, digital camera is an important component part. According to the different components can be divided into CCD (ChargeCoupledDevice, charge-coupled device) and CMOS (ComplementaryMetal-OxideSemiconductor, metal oxide semiconductor) into two categories.

        Image sensors are optical components in the optoelectronics industry category, with digital technology, semiconductor manufacturing technology and the rapid development of the network, the current market and the industry are facing across the platform, video, audio, communications, great integration era, outlining the daily life of the future of human beauty. Its application in daily life, no doubt to belong to a digital camera products, the rapid pace of development can be described. Just a few years, digital cameras by the hundreds of thousands of pixels on the development to 400,500 million pixels or more. Only in developed western countries, a digital camera already has a significant market, China is in development, the digital camera market is growing at an alarming rate, so the key components of image sensors has become current and future the object of concern to the industry, attracting a large number of vendors to invest.

        With the rise of all kinds of consumer electronics, surveillance cameras image sensor semiconductor industry has become the most dazzling star products, and in the image sensor, CCD sensor and emerging growth CMOSSensor gradually find their application market, hopes to become the mainstream technology on the market. Surveillance camera´s image sensor with CCD sensor sensitivity compared to low signal to noise ratio of high disadvantage, but it still has low power consumption, low cost.

        Imaging process

        CCD and CMOS using the same photosensitive material, which produces electrons by light after the same basic principles, but the process of reading different: CCD is the sync signal and the clock signal in conjunction with the frame or line of such transfer, the circuit is very complex, time the slower; CMOS DRAM places like the way the signal readout circuit is simple, high-speed readout.

        Integration

        Manufacturing process using a special CCD readout circuit is more complex, difficult to A / D conversion, signal processing, automatic gain control, precision zoom and storage functions into a single chip, multiple chip portfolio generally need to achieve, but also requires a multi-channel non-standard power supply voltage. With large-scale integrated manufacturing process, CMOS image sensors can be very easy to put these functions into a single chip, while the majority of CMOS image sensor with analog and digital output signals.

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