CCD is the abbreviation of Charge Coupled Device (CCD). It is a kind of semiconductor imaging device and therefore has the advantages of high sensitivity, strong light resistance, small distortion, small size, long life, and shock resistance. For the surveillance camera, the CCD is the most central component and is equivalent to the eyes of the surveillance camera. How is the CCD chip market at this stage?
There are different classifications depending on the color, resolution, sensitivity, and target size of the image. In general, a large CCD chip has a relatively large pixel area, and an increase in the area of ​​the received light will inevitably increase the output charge of the pixel, increase the sensitivity, and have good shooting ability under low light conditions. , It is easy to improve the overall quality of the camera and the details of the image are clear and natural. The smaller the focal plane is when the optical system focuses the image, the more detail is lost during the imaging process, and the resulting image transition after zooming in may be mutated, making it unnatural.
In addition, a smaller CCD with more pixels and a higher resolution may also result in a reduction in the photosensitive area of ​​a single pixel, and there is a possibility of underexposure. The smaller the area of ​​a single pixel, the lower the sensitometric performance, the lower the signal-to-noise ratio, and the narrower the dynamic range. The information on each pixel tends to mix with the information of the pixels in its vicinity (in electronics this concept is called chroma intensity interference).
CCD and CMOS Complementary Complementary metal-Oxide-semiconductor CMOS (Complementary Metal-Oxide Semiconductor) is the same semiconductor as CCD that can record light changes in a digital camera. The manufacturing technology of CMOS is no different from a general computer chip. It is mainly a semiconductor made of two elements of silicon and germanium, which makes it possible to coexist semiconductors with N (band-electric) and P (charged) levels on CMOS. The current generated by these two complementary effects can be recorded and interpreted by the processing chip as an image. However, the disadvantage of CMOS is that it is prone to noise. This is mainly due to the fact that early designs made CMOS overheated due to current changes when dealing with rapidly changing images.
It can be seen from the working principle of the two types of photosensitive devices that the advantages of CCDs are good image quality, but due to the complexity of the manufacturing process, only a few manufacturers can grasp them, which leads to high manufacturing costs, especially for large CCDs, which are very expensive.
At the same resolution, CMOS is cheaper than CCDs, but the quality of images produced by CMOS devices is lower than that of CCDs. CMOS sensors are used as low-end products on some cameras.
One of the advantages of the CMOS image sensor is that the power consumption is lower than that of the CCD. The CCD provides excellent image quality and the cost is higher power consumption. In order to make charge transfer smooth and reduce noise, the transmission effect needs to be improved by the high voltage difference. . However, the CMOS image sensor converts the charge of each pixel into a voltage, which is amplified before reading, and can be driven with a 3.3V power supply. The power consumption is lower than that of the CCD.
Another advantage of the CMOS image sensor is its high integration with the peripheral circuits, which can integrate the ADC and the signal processor to greatly reduce the size. For example, a CMOS image sensor requires only one set of power sources, and a CCD requires three or four. In the group power supply, since the process of the ADC and the signal processor is different from that of the CCD, it is difficult to reduce the size of the CCD kit. However, the primary problem to be solved by CMOS image sensors is to reduce the noise generation. Whether CMOS image sensors can change the fate that has long been suppressed by CCDs, and the development of future technologies is an important key.
CCD market status CCD is closer to the way the human eye works on vision. However, the retina of the human eye is composed of rod cells responsible for light intensity sensing and color-inducing cone cells, which cooperate to form visual induction. After more than thirty years of development, the CCD has been shaped and its general shape and mode of operation have been finalized. The composition of the CCD is mainly composed of a mosaic-like grid, condenser lenses, and an electronic circuit matrix that is placed at the bottom. The companies that currently have the ability to produce CCDs are: SONY, Philps, Kodak, Matsushita, Fuji, and Sharp. Most of them are Japanese manufacturers. The CCDs used in our surveillance cameras are mostly made in Japan. Some time ago the Japanese earthquake, Japan SONY, Sharp and other manufacturers were affected, the price of surveillance cameras in China will rise.
In the 21st century, the world has entered the information age, and the networking of digitization, computerization, communication, and television will soon become a reality, allowing people to face, learn, and study. From the perspective of the entire system, the CCD camera is one of the core components. However, due to the development of the CCD camera manufacturing technology and the CCD sensor production line, the CCD industry in China is in urgent need of development to meet the needs of the market. With the rapid growth of China's economy and the acceleration of the process of information industrialization, the market for CCD cameras will become larger and larger, and the fields of application will go deep into every relevant professional field, bringing new concepts to people.
There are different classifications depending on the color, resolution, sensitivity, and target size of the image. In general, a large CCD chip has a relatively large pixel area, and an increase in the area of ​​the received light will inevitably increase the output charge of the pixel, increase the sensitivity, and have good shooting ability under low light conditions. , It is easy to improve the overall quality of the camera and the details of the image are clear and natural. The smaller the focal plane is when the optical system focuses the image, the more detail is lost during the imaging process, and the resulting image transition after zooming in may be mutated, making it unnatural.
In addition, a smaller CCD with more pixels and a higher resolution may also result in a reduction in the photosensitive area of ​​a single pixel, and there is a possibility of underexposure. The smaller the area of ​​a single pixel, the lower the sensitometric performance, the lower the signal-to-noise ratio, and the narrower the dynamic range. The information on each pixel tends to mix with the information of the pixels in its vicinity (in electronics this concept is called chroma intensity interference).
CCD and CMOS Complementary Complementary metal-Oxide-semiconductor CMOS (Complementary Metal-Oxide Semiconductor) is the same semiconductor as CCD that can record light changes in a digital camera. The manufacturing technology of CMOS is no different from a general computer chip. It is mainly a semiconductor made of two elements of silicon and germanium, which makes it possible to coexist semiconductors with N (band-electric) and P (charged) levels on CMOS. The current generated by these two complementary effects can be recorded and interpreted by the processing chip as an image. However, the disadvantage of CMOS is that it is prone to noise. This is mainly due to the fact that early designs made CMOS overheated due to current changes when dealing with rapidly changing images.
It can be seen from the working principle of the two types of photosensitive devices that the advantages of CCDs are good image quality, but due to the complexity of the manufacturing process, only a few manufacturers can grasp them, which leads to high manufacturing costs, especially for large CCDs, which are very expensive.
At the same resolution, CMOS is cheaper than CCDs, but the quality of images produced by CMOS devices is lower than that of CCDs. CMOS sensors are used as low-end products on some cameras.
One of the advantages of the CMOS image sensor is that the power consumption is lower than that of the CCD. The CCD provides excellent image quality and the cost is higher power consumption. In order to make charge transfer smooth and reduce noise, the transmission effect needs to be improved by the high voltage difference. . However, the CMOS image sensor converts the charge of each pixel into a voltage, which is amplified before reading, and can be driven with a 3.3V power supply. The power consumption is lower than that of the CCD.
Another advantage of the CMOS image sensor is its high integration with the peripheral circuits, which can integrate the ADC and the signal processor to greatly reduce the size. For example, a CMOS image sensor requires only one set of power sources, and a CCD requires three or four. In the group power supply, since the process of the ADC and the signal processor is different from that of the CCD, it is difficult to reduce the size of the CCD kit. However, the primary problem to be solved by CMOS image sensors is to reduce the noise generation. Whether CMOS image sensors can change the fate that has long been suppressed by CCDs, and the development of future technologies is an important key.
CCD market status CCD is closer to the way the human eye works on vision. However, the retina of the human eye is composed of rod cells responsible for light intensity sensing and color-inducing cone cells, which cooperate to form visual induction. After more than thirty years of development, the CCD has been shaped and its general shape and mode of operation have been finalized. The composition of the CCD is mainly composed of a mosaic-like grid, condenser lenses, and an electronic circuit matrix that is placed at the bottom. The companies that currently have the ability to produce CCDs are: SONY, Philps, Kodak, Matsushita, Fuji, and Sharp. Most of them are Japanese manufacturers. The CCDs used in our surveillance cameras are mostly made in Japan. Some time ago the Japanese earthquake, Japan SONY, Sharp and other manufacturers were affected, the price of surveillance cameras in China will rise.
In the 21st century, the world has entered the information age, and the networking of digitization, computerization, communication, and television will soon become a reality, allowing people to face, learn, and study. From the perspective of the entire system, the CCD camera is one of the core components. However, due to the development of the CCD camera manufacturing technology and the CCD sensor production line, the CCD industry in China is in urgent need of development to meet the needs of the market. With the rapid growth of China's economy and the acceleration of the process of information industrialization, the market for CCD cameras will become larger and larger, and the fields of application will go deep into every relevant professional field, bringing new concepts to people.
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