Sony TV has always been a spokesperson for picture quality, and its persistence and pursuit of picture quality are well known. Although Sony itself produces screens, most of them will be used in prototypes, military and commercial applications, and will never be used in mass-produced TV sets. Sony LCD TVs use LCD screens produced by Chinese panel makers such as Chi Mei, AUO, and China Star Optoelectronics. They do not use LCD screens imported from their own screens or from many TV manufacturers.
Millet and Sony TV can be counted as the representative brands in the current mid-to-high-end market, each with unique brand advantages, and both have accumulated a large number of user groups. However, in terms of core image quality alone, using domestically-made screens, Sony is undoubtedly more advantageous than using millet-based screens. I believe we have not questioned this. So why did this happen? The key lies in the TV image processing chip. Whether you use a domestic or imported screen, you want a true color, exquisite and clear high-quality performance. A good image processing chip is essential.
The screen is indeed an important factor affecting the picture quality of TV. Everyone is very clear about this, but the quality of the picture is not an important factor in the civilized language. The TV image processing chip also affects the picture quality performance.
What is the power of the TV picture quality chip?
Compared to many manufacturers promoting LCD panels, TV picture quality chips are somewhat obscure, because not all TV manufacturers have the ability to develop TV picture quality chips, so it will focus on the screen itself. However, in terms of the quality of TV core graphics, the role of TV-quality chips is not inferior to television screens, and even more important than the role of the panel.
The TV picture quality chip can be understood as a component of the video card in the host computer. It can process and repair the image signals and images in the signal. In the clarity, noise reduction, color enhancement, contrast enhancement, motion compensation and other aspects play a crucial role. At the same time, the video signal entered by the TV interface must be processed by the image engine, converted into a signal suitable for its own TV broadcast, and optimized accordingly, which can effectively improve the picture quality performance.
Do not confuse the ARM chip and the picture quality chip in TV Before we talked about not all television manufacturers have the research and development capabilities of the TV picture quality chip, so some manufacturers began to steal concepts and use ARM processing chip to replace the TV picture quality chip promotion. The main role of the ARM chip is to serve Android systems and video decoding.
Of course, there are many ARM chips integrated with the image quality engine technology, but there are still some problems in improving the image quality, just like using a nuclear display to play the same effect as a stand-alone machine.
Although the integrated image quality engine in the ARM chip can meet the simple image processing requirements, we must not think that this is a very powerful thing. In fact, this is just an all-in-one chip that integrates all interfaces, that is, as long as it is The same chip solution is the same as the underlying program connected to the TV. There are no features at all. What really makes sense is a TV-independent picture quality chip, a unique algorithm, and a powerful database, all of which require television manufacturers to invest significant effort and cost in R&D.
Not all manufacturers have the ability to develop a picture quality chip. For the development of TV picture quality chips, a large amount of front-end video material information needs to be collected to form a database for the back-end image processing chip. With different materials, corresponding information can be created according to the large database. Image processing algorithms. For example, to treat different resolutions, different streams, different shades, different shade screens, you need to find the corresponding algorithm from the database to optimize. This requires a good understanding of the hardware and content, for those TV manufacturers that do not have R&D capabilities. It's hard to do.
The role played by TV chips for picture quality is somewhat greater than the screen itself. Of course, the author does not deny that good screens can indeed add value to picture quality. High-quality panels are more excellent in terms of backlight control and light transmittance. If the backlight components in the LCD panel are not good enough, even the top quality chips will still see significant light leakage, and excellent image quality performance will be impossible. Talking about it, the TV screen and the image processing chip are more complementary to each other.
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Camera Module is generally composed of the following parts: Lens, image sensor, base bar and line.
If it is a camera module with AF function (generally a mobile phone camera), most of them adopt VCM mode, which has one more coil than the above structure. By adding points to the coil, the lens can move vertically to achieve the function of focusing. In the case of a camera with a shake resistant feature, the lens is also able to move horizontally to achieve an optical shake resistant effect
Camera module selection
The sensor and lens in the camera module usually account for more than 90% of the cost, and the image quality is also determined by them.
First, choose the most appropriate sensor according to the price you can accept, the interface of the motherboard, and the resolution you need to take photos and video
The price of the sensor usually accounts for 40%-60% of the price of the module. In order to ensure that the resolution/frame rate can meet the requirements, sensors with better sensitivity and larger pixel area are selected at a certain cost.
Secondly, according to the purpose of the sensor you need, choose the lens with the appropriate size and field of view Angle. If a lens with a large field of view is needed, you can choose a fish-eye camera (also known as a wide-angle camera). However, for the image taken by the fisheye camera, there will be a distortion effect. In fact, the distortion effect can be corrected by itself.
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