行业知识

Recycling mobile phone camera anti-shake technology detailed

Recycling the phone camera wide static necessary to adopt a fast readout CMOS image sensor. With CCD image sensors, the application is limited to applications that last 1/60s or 2x 1/30s even field decomposition. In the new technique of wide static, the application can adopt the long exposure of 1/30s picture, apply the short exposure of 1/30s picture, and then stop the two pictures in time to get an industrial grade remaining wide static scale. Image of.

There are also companies that are opening up HDR in ways to open up differences. One of them is called static corresponding pixel technique. This kind of technique focuses on the DR outside the image, that is, each pixel has participated in the divergence sensitivity. The reason for this kind of pixel is that there is a large charging capacitor. .


When the image is highlighted, the DCG switch is turned on and connected to the physical capacitance of the FD node. Through this type of method, the large-capacity capacitor of the FD node enables the LCG form, that is, it can hold a large number of signals to charge (not overflow). Under low illumination conditions, the DCG switch is closed, disconnecting the capacitor connected to the FD junction, enabling the HCG form, ie the nominal analog gain applied outside the pixel. In this case, the FD capacitance depends only on the PN junction capacitance of the FD and the metal mutual coupling capacitance, which is much smaller than the physical capacitance layout. Fewer FD capacitor results will improve conversion gain, improve sensitivity and reduce read noise, which is worthwhile for the lowest charge charging capacitor.
The introduction of anti-shake techniques can bring the consequences of high-pixel cameras closer to DSC. Nowadays, our camera's anti-shake technique is mainly adopted as follows: Optical Image Stabilizer (OIS), mobile CMOS chip surface, algorithm anti-shake, JPEG transmission, High-ISO, MIPI transmission. Among the several techniques listed, we are currently using algorithmic anti-shake, JPEG transmission, High-ISO, MIPI transmission. OIS is expected to be used in the future. Under the face of several commonly used methods of anti-shake to introduce.


1, OIS
Through the lens group to complete the anti-shake master, if you attach the magnetic package to the suspension lens, it is useful to surrender the image caused by the camera vibration, and the effect of the digital camera against the large zoom lens is doubled. On weekdays, the gyroscope in the lens detects a small movement, and transmits the signal to the micro-processor to immediately calculate the amount of displacement necessary for compensation, and then compensates the lens group for compensation according to the dithering and displacement of the lens. Thus, the useful image of the surrender due to the vibration of the camera is vague. The effect of the optical anti-shake effect is proportionally significant. Under normal circumstances, turning on this effect can improve the shutter speed of 2-3 files, so that the handheld shooting will not appear looming signs, and the consequences for the beginners are extremely significant. In the inner telephoto digital camera, the consequences are also to see the rice.
2, algorithm anti-hand shake electronic anti-shake tricks in the use of static vectors in the detection of trembling. The oscillating deflection and the amount of sway of the image are controlled according to the static vector, and the image position is moved in parallel as a reference, thereby generating a static image without shaking.
Today APTINA, OVT, FUJITSU, NEC have adopted the High-ISO method to prevent hand shake. This kind of anti-shake effect has an effect on the image, which is to introduce a certain noise, but this is the most expensive defense. The method of shaking is easy to accomplish.

Futian District, Shenzhen, Yueyue Blueprint Electronic Firm is a new type of professional recycling company, mainly engaged in the recycling and supply of electronic components and electronic inventory; recycling types are: recycling mobile phone lens , recycling mobile phone camera module, etc.; Shenzhen Futian District, Yueyue Blueprint Electronic Firm has its own processing factory: not only has a wide range of recycling, but also prompt delivery, abundant inventory, a fixed registered address to ensure customer reassurance and many other advantages, headquartered in Shenzhen, business coverage Shenzhen, Dongguan, Guangzhou, Huizhou, Zhuhai, Zhongshan, Foshan, Jiangmen, Zhaoqing and other Pearl River Delta regions, Shanghai, Jiangsu, Zhejiang and other Yangtze River Delta regions, as well as the Hong Kong Special Administrative Region.

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