Look at the resolution
Resolution is an important parameter for electronic products, which represents the precision of the screen image. The image we see is composed of pixels. The more pixels the electronic screen can display, the more detailed the picture will be and the more information will be displayed.
The term "4K" commonly used in smart TVs refers to resolution. Currently, the more common resolutions include HD, Full HD, and Ultra HD. A TV with a resolution of 1366*768 pixels can be called a high-definition TV, but it is commonly used in low-end electronic products, and smart TVs are relatively rare now.
Full High Definition (FHD), also called 2K TV, has a resolution of 1920*1080 pixels and is a commonly used resolution for mid- to low-end smart TVs. Ultra HD is often referred to as 4K. Its resolution reaches 3840*2160 pixels, which is 4 times that of full HD and has better expressiveness.
Of course, it doesn't mean that the seller says the TV is 4K or it is real 4K. You also need to be wary of fakes. As mentioned before, resolution is composed of pixels, and pixels are imaged by red, green, and blue colors (RGB matrix); fake 4K adds white to this basis to form an RGBW four-color mode, resulting in blurred color rendering and image The display effect deteriorates.
In addition, smart TVs require professional decoding to fully express images. At the beginning of the development of smart TVs, the most widely used decoding format was H.264, but in the 4K era, the encoding format was upgraded to H.265. If there is no such decoding, it does not mean that the TV is truly 4K.
Look at the color gamut
Color gamut is also an important parameter of smart TVs. It represents the range of colors that the electronic screen can display and the percentage it occupies in a certain color space. Generally, the higher the color gamut, the stronger the TV's ability to restore colors, the richer the colors and the more realistic the objects when viewing.
Color gamut has two expression methods: sRGB color gamut value and NTSC color gamut value. Generally, we use NTSC color gamut value as the standard, which is formulated by the American Television Standards Committee. The color gamut of NTSC is wider than that of sRGB. For example, 90% of the sRGB color gamut is only equivalent to about 70% of the NTSC color gamut.
Although a larger color gamut value will make the TV picture more delicate and the color transition more natural, a higher color gamut is not better. There are many colors in a high color gamut, and the screen's ability to control colors may not be able to keep up. Once the color control is not accurate, the image will be distorted, and the gain will not be worth the loss.
Under normal circumstances, if the screen color gamut reaches 100% sRGB/72% NTSC or above, it is a good screen; if it reaches 90% AdobeRGB/90% NTSC or above, it is a very good screen; if the screen color gamut of a smart TV is only 65% sRGB Or 45% NTSC, it is recommended to avoid choosing it as much as possible.
Look at the hardware
Whether it is resolution or color gamut, they are both external aspects of smart TVs, while hardware is the internal part that supports its performance. Both are indispensable. Hardware belongs to a large range, including what we call chips and memory.
Chip
The chip is the key to determining the performance and picture quality of the TV. As the functions of smart TVs become more and more complex, the computing requirements for the chip will become higher and higher. The factors that affect the performance of the chip are the number of CPU cores and the operating frequency. Currently, the most commonly used chips in the smart TV market are Cortex-A53, A57 and A73.
If it is a chip product such as Cortex-A7, A9, etc., it can only maintain a certain smoothness, and lags may occur after the TV software is updated. Of course, smart TVs change quickly, and the chips must be updated in time. To judge the quality of the CPU, you can look at the number in the suffix. The larger the number, the newer the product and the better the performance.
Memory
Anyone who has bought a mobile phone will be familiar with memory. The memory of smart TVs is the same as that of mobile phones, which is divided into running memory and storage memory. Running memory affects the running speed and smoothness of the TV system. The software that comes with the TV will also occupy the running memory. If too much memory is used, lags and other phenomena will occur.
Storage memory is like a warehouse where content can be stored or used at will. Usually cached content, downloaded applications and games are placed here. If you buy a TV and only need to watch it, it doesn't matter if the memory is smaller. Usually 2G is enough; if the TV needs to download applications and games, you can choose 16G or 32G.