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The camera mainly has a lens, a CCD image sensor, a pre-intermediate release, an AGC, an A/D, a sync signal generator, a CCD driver, an image signal forming circuit, a D/A conversion circuit, and a power supply circuit.
The working principle of the camera is: the object reflects light, propagates to the lens, and is focused by the lens onto the CCD chip. The CCD accumulates the corresponding charge according to the intensity of the light, and periodically discharges to generate an electrical signal representing a picture. After the pre-interpolation circuit amplification and AGC automatic gain control, the digital processing is processed by the image processing chip, so the analog-to-digital conversion is performed to the image digital signal processing IC (DSP). The sync signal generator mainly generates a synchronous clock signal (completed by the crystal oscillator circuit), that is, generates vertical and horizontal scan drive signals to the image processing IC. Then, a digital composite conversion circuit outputs a standard composite video signal through the output terminal. This standard video signal is the same as the video output of a home video recorder, VCD player, and home video camera, so it can also be recorded or connected to a TV. Image digital signal processing is mainly SONIX (Song Han) and VIMICRO (Zhongxing Micro).
What are the mainstream chips of the camera?HY7131E: A sensor for PC cameras launched by Hyundai, which is the best comprehensive product in the current camera market. At present, Hyundai has stopped production, and only some large camera manufacturers have a certain inventory. If you can buy now Speed and picture quality will be quite good for such products.
HY7131R: It is a substitute for Hyundai's HY7131E. As far as the current camera effect is concerned, the current product driver is applied. The effect is not as good as HY7131E, but the price is better. You can purchase Micro360 selectively: it is a good performance sensor produced by Taiwan Micron Company. In the driver cooperation and picture quality performance is good, the current market is larger than the camera is equipped with this chip, in the absence of HY7131 products, it is recommended to buy.
At present, the DSP model and main parameters of the camera application are more than [350,000 pixels for supporting hardware except for special labels] VIMICRO301P: In the field of camera, it is a very good chip in the Chinese mainland chip industry, and it is also quite high in the world. The reputation is the only one with the most powerful color reproduction and fast transmission. The mainstream camera uses this chip!
SUNPLUS561: This chip is a hardware 100,000-pixel chip. It can still be up to 300,000 pixels after software interpolation. It is the most mainstream match of the 300,000-pixel camera on the market. It is worth mentioning that he is a single-chip product solution, the sensor and DSP are integrated into one chip, so the price is quite high!
VIMICRO301L: It is an alternative product for 301P. It is an optimized product under the control cost. Although this product is rarely seen on the market at present, I believe that the success of Zhongxing Micro 301P product and the accumulation of experience, the chip effect must be quite Not bad.
EM2800/2710: This chip is a 1.3 megapixel DSP of Heiriya. The EM2800 is mainly used as a capture chip for TV cards. However, there are some large camera manufacturers in China that make him a camera product. It is about twice as much as a normal camera. EM2710 is mainly used as a camera product. Its product performance is equivalent to that of EM2800 in camera application. These two chips support high-speed USB2.0 interface at the same time. Under the performance of good computer configuration, the product effect and speed will be quite excellent!
Sonics102P: One of Taiwan's famous dsps, its product features are characterized by clear picture quality and good color and color performance, but the relative speed is slightly superior to similar products, and a small number of portable small cameras on the market also With this chip!
Camera chip model summaryCamera industry chain
1 camera chip manufacturers: Geke Micro, OV, Sibike, Sony, Samsung, Hynix, Wonderland, Hynix ApTIna and so on.
2 camera lens manufacturers: Xuye Optoelectronics, Sichuan Hetian Optoelectronics, Shenzhen Dali, Idea Optoelectronics, Sunny Optical, Dole Optoelectronics, Xinxu, Jinglongda, Huaxin Optoelectronics, Xingbang Optoelectronics, etc.
3 camera module manufacturers: Haoyu, Oufeiguang, Xinli, Qiu Tiwei, Shengtai, Imaging Tong, Mei Yansi, Guangzheng, Jinkang, Kaimujin, Fang Deya, Riyong, Sangle, win-win Xing, Dong Hengsheng, Tongju, Bo Lixin, Da Ling, Ketetong, Zhuo Ruitong, Xin Chenguang, Four Seasons Spring, Guangbao, Qunguang, Foxconn, Yiweili, Dongju, Zhongguang, Zhengqiao , Baichen, Kyle, Min, Kanglong and so on.
Let's take a look at the specific model of the camera chip and its parameter comparison list:
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