Application of CMOS Image Sensor in Security Camera

Overview of CMOS and CCD image sensors With the rise of various consumer electronics, image sensors have become one of the most dazzling star products in the semiconductor industry. In image sensors, CCD sensors and emerging CMOS sensors have gradually found their own. The application market wants to be the master of the market? technology. Is a CMOS Image Sensor Sensitive to CCD Sensors? Low, low signal to noise ratio, but it still has the advantages of low power consumption, low cost and so on.

For the Global Image Sensor IC Component Market Analysis, 2010? Global Image Sensor component application market size is 710 million US dollars, after passing? Rongfeng? After the impact, the positive growth trend continues. TRI estimated in 2012? The size of the mage Sensor market is approximately US$850 million; the market share of the Image Sensor is particularly high with CMOS Sensors, with an average ratio of approximately 90%;

For CMOS Sensor Market Size Analysis, 2010? The overall market size of CMOS Sensor components was US$630 million, accounting for 89% of the overall Image Sensor market, and the overall market trend maintained an average range of 90%. Infiltration of various consumer electronics devices? High? State, the future growth rate? Slowing down into the mature period of industry growth, TRI estimated CMOS Sensor in 2011? ? growing up? For 13%, the future will pursue technological pixel and manufacturing costs.

The CMOS sensor is the most important image sensor application component for the camera module application market. Among them, the highest share of applications is in telecommunications electronics products, accounting for 70% of the overall CMOS Sensor market. The main applications of the CMOS Sensor market include safety systems, automotive systems, PC related peripheral applications, digital cameras, etc. The IPad-driven tablet market is the fastest growing market for CMOS sensors.

The application market for security cameras accounts for 10% of the image sensor market. In the past, CCDs were mostly used as image sensors. ? The performance of CMOS Sensors has been continuously improved, and it has entered the market that has long been the exclusive market for CCD Sensors, and it is mainly in favor of lower-priced security cameras.

CCD and CMOS technical characteristics CCD and CMOS technology features mainly in the imaging process, integration, power consumption, performance indicators and other aspects.

1) Imaging process CCD and CMOS use the same photosensitive material, so the basic principle of electron generation after receiving light is the same, but the reading process is different: CCD is transferred in frame or line mode with the synchronization signal and clock signal, the entire circuit It is very complicated and the read rate is slow. CMOS reads out the signal in a DRAM-like manner. The circuit is simple and the read rate is high.

2) Integration The CCD readout circuit using a special manufacturing process is relatively complex, it is difficult to integrate the A/D conversion, signal processing, automatic gain control, precision amplification and memory functions into one chip, generally requiring multiple chip combinations to realize. There is also a need for a multi-channel non-standard supply voltage. With a large-scale integrated manufacturing process, CMOS image sensors can easily integrate the above functions into a single chip. Most CMOS image sensors have both analog and digital output signals.