1, the maximum physical resolution of the screen: 1366*768 and 1920* 1080. The former is called standard HD, which is cheap to watch ordinary digital TV programs and DVDs, and the latter is called full HD, which is expensive to watch Blu-ray DVD and HD digital TV, depending on your own needs and budget. To achieve the effect of high definition and full HD, the TV, player, transmission mode and signal source must meet the standard format of high definition at the same time, such as full HD 1920* 1080 TV screen, and Blu-ray DVD and Blu-ray Disc with the same resolution format to see the effect of full HD. If several resolutions are inconsistent, you can also watch, but the definition is subject to the lowest resolution. Many people ask what TV set to buy for playing games, depending on the resolution of 360 game consoles and cassettes, and decide what kind of TV set the screen resolution is. When a flat-panel TV is connected to a computer, because the resolution of the graphics card on the computer is mainly compatible with the monitor, and the standard resolution format of the monitor and the TV is different, and the non-professional graphics card does not have the high-definition format of the TV, in this case, it is impossible for the TV to display the high-definition video of 1366*768 or 1920* 1080 on the computer. Any signal that does not meet the screen resolution will be automatically displayed in full screen by the algorithm.
2. Dynamic response time of the screen: it affects the smear of dynamic images. The best screen is 5 milliseconds, and the price is higher than the ordinary screen 18 milliseconds. In fact, when non-professionals look at professional images, 18 milliseconds can't tell the difference between the human eyes. Nowadays, frequency doubling technology to improve image quality is very popular. In the final analysis, it is to make up for the lack of screen performance. In fact, a screen that can reach 5 milliseconds does not need any compensation. In addition, there is LG's IPS LCD screen, whose molecular arrangement is different from that of Sharp and Samsung, and its dynamic response time is shorter. Therefore, in theory, the phenomenon of motion picture tailing is relatively light, but it does not mean that the response time is zero and there is no tailing at all. In fact, people's eyes can't tell the difference between milliseconds. For these kinds of screens, we should pay attention to the on-site comparison.
3. Brand: mainly depends on the screen manufacturer. In fact, there are not many screen manufacturers and suppliers, mainly Sharp and Samsung, which are the largest LCD screen manufacturers in the world. Their whole machine is not only recognized as first-class in the industry, but also leads the product trend. In theory, the dynamic response time of LG's hard screen is faster, so the trailing performance is better, and LG's whole machine is also cheaper in the imported joint venture. Domestic machines are all assembled with imported screens and core technologies. It can be said that the products are pieced together, so the stability of the whole machine is poor, but the price is cheap. Cheap machines are all screen-saving in Taiwan Province, and their performance is not very good. Domestic machines are representative brands or professional TV manufacturers, such as Hisense and Skyworth, and their assembly quality is relatively stable.
4.LED backlight: In fact, LED TV sets on the market now use LED instead of screen, but the backlight of LCD screen uses LED. Compared with cold cathode fluorescent lamp backlight, it has five advantages: first, it has an ultra-wide color gamut, which can reach 105%NTSE color gamut, and the color is more vivid; Second, it has an ultra-thin appearance, with the thinnest reaching 1.99 cm, which is more fashionable; Third, energy saving and environmental protection, energy consumption is 52% lower than that of cold cathode backlight, and there is no mercury pollution of cold cathode tube; Fourth, the service life is long, reaching nearly 65438. If you drive for 10 hours every day, you can use it for 27 years. Fifth, the ultra-high contrast ratio of 10000: 1 can be achieved with higher definition. The above performance advantages determine that LED backlight is a substitute for cold cathode backlight in technology. Because the time to market is short, it is more expensive, and the price is basically 150% of that of cold cathode backlight products. In the final analysis, LED backlight itself has no choice. The technical performance parameters of LCD panel, such as maximum physical resolution and dynamic response time, are mainly selected for the whole machine, which is the same as that of ordinary LCD TV.
5. Screen width: At present, flat-panel TVs are all 16: 9 widescreen, but the TV signal is still 4: 3. Therefore, the ratio of 16: 9 is used to transverse stretching, and it will be fine if you get used to it. You can also set it to 4: 3, but there are black edges on both sides of the screen. Pay attention to the size of the viewing distance when shopping. Choose 32 inches for 2 meters, 37-40 inches for 2.5 meters, and 50 inches for more than 3 meters. Because it is a widescreen, the screen height of the 32-inch TV is equivalent to that of the old CRT TV.
6. About plasma: The screen of plasma is the pixel itself, and there is no tailing phenomenon of liquid crystal, and the sensory effect is better than that of liquid crystal. However, because the pixel size of plasma is larger than that of LCD, it is not suitable for small screen with full HD resolution, but the size of about 50 inches is completely fine, so plasma should be the first choice for large size, and the price of large size plasma is cheaper than LCD. It turns out that Hitachi is the largest plasma manufacturer in the world, and Changhong cooperated with it to build its own plasma screen production line, so Changhong's plasma TV set is the first choice for China products. Hitachi's plasma screen business has now been sold to Panasonic, so Panasonic is the first choice for importing joint venture plasma.
7. Eye protection function: LCD or plasma screen itself has no eye protection function, and some machines have circuit function to automatically adjust brightness and contrast according to ambient light. Using eye hygiene or mastering time and posture when watching TV by yourself has nothing to do with TV performance. Those who say that their products have eye protection function are basically unscrupulous manufacturers. If you don't believe me, ask him if he has a test report from the authoritative department of the state.
8. Multimedia such as USB flash drive and Internet: Only domestic brands like to use the multimedia function of TV as a selling point. In fact, if you have a computer at home, you can easily connect to the TV, and you don't need a USB interface and the Internet. U disk drivers on TV are all solidified, which involves copyright issues and has poor compatibility. Finding a computer format is a very painful thing. Internet TV is not like a computer that can surf the Internet at will. In fact, it just has an additional network card, a website platform that needs the cooperation of manufacturers, and the videos and music that can be downloaded are greatly limited. These are the gimmicks of manufacturers, and the inherent performance of TV itself has not fundamentally changed.