Here, "A New Life in Audio and Video" gives us an explanation of several very important TV screens and backlighting technologies. ◠TN screen The TN screen we often say is actually an abbreviation for the Twisted Nematic panel. In fact, you don't have to memorize this complicated academic name. Just remember: TN screen is the lowest-cost LCD panel. In general, the display is the worst and the viewing angle is the narrowest. Basically, most low-end monitors use this kind of panel because it's really cheap. ◠VA screen VA screens are mainly divided into Fujitsu-developed MVA and Samsung's PVA-based, relatively speaking, a better solution than TN but still less than IPS's compromise solution. The VA panel has a better wide viewing angle, but it still belongs to a soft screen (when the touch panel is touched with a finger, it will generate ripples), and the response time, viewing angle, and uniformity are not as good as those of the IPS. This kind of panel is usually equipped on some mid-high end displays. ◎ MVA Technology MVA (Multi-domain Vertical Alignment) can be said to be the earliest wide viewing angle LCD panel technology. This type of panel can provide a larger viewing angle, usually up to 170°. Later, the improved viewing angle of the P-MVA panel can reach a nearly horizontal 178°, and the gray-scale response time can reach 8ms or less. ◎ PVA Technology PVA (Patterned Vertical Alignment) also belongs to the category of VA technology. It is the successor and developer of MVA technology. Its comprehensive quality has already surpassed the latter, and the improved S-PVA has been able to keep pace with the P-MVA, gaining an extremely wide viewing angle and faster and faster response time. PVA uses a transparent ITO electrode instead of the protrusions of the liquid crystal layer in the MVA, and the transparent electrode can obtain a better aperture ratio, minimizing the waste of the backlight source. This mode greatly reduces the possibility of "bright spots" on the LCD panel. The status in the era of LCD TVs was equivalent to the "steak management" in the era of CRT TVs. ◠IPS and PLS screen There is no doubt that IPS is currently the best performing LCD panel with outstanding color performance, high viewing angle, and lower power consumption. IPS is often referred to as a "hard screen" because it has a glass outer layer on its surface, and high-end televisions, mobile phones, tablets, and monitors are all equipped with IPS panels. As for PLS, it is Samsung's standard IPS, and its cost is lower, but it is basically consistent with IPS. Difference between IPS (left) and TN (right) panels ◠LED backlight technology (LED screen) LED TV replaces CCFL cold-cathode fluorescent tubes with light-emitting diodes to achieve better lighting effects. However, the development of LED backlight is still evolving so far, with different types and different display effects. ◎ Direct type LED backlight Mainly in the backlight board covered with LED lights to achieve a uniform lighting effect. The characteristic is that the picture quality is delicate, and the backlight source can be set to an area, that is, a so-called "local control light" technology, so as to realize separate processing for different colors. However, this kind of backlight technology will affect the thickness of the TV, so some TVs that sell on ultra-thin TVs turn to another kind of backlighting technology. ◎ Side-entry LED backlight It is very easy to understand that the edge-in LED backlight is set up around the LCD panel with an LED light bulb, and illuminates the light guide plate to realize the illumination of the liquid crystal panel. Because there are fewer bulbs, the operating TV manufacturers have designed the TV body to be thinner and lighter, and the mainstream ultra-thin TVs in the market use this technology. However, due to some birth defects, it is impossible to achieve partial light control, and the color performance is not as good as the direct type. ◠Quantum dot technology The recently popular "QD TV" is actually a new type of backlight technology. Its special feature is the use of nanocrystalline materials instead of LED light sources, to achieve a more pure, more realistic color reproduction of backlight colors, the LCD TV's color effect can be upgraded to be comparable to the level of OLED. Therefore, LCD TVs using quantum dot technology are also very effective and cost-effective in the current market. ◠OLED screen The OLED screen is actually a completely different type of display screen. It is called the Organic Light-Emitting Diode (organic light emitting diode), and it is totally different from the liquid crystal screen (Liquid Crystal). OLED features self-luminescence (without backlight), ultra-thin, bright colors, wide viewing angle, etc. At the same time, plastic panels can be used, which means that it can be softened more gently. From the development of the above TV screens, we can imagine that the TV screens in the future will become more and more clear, the colors will become more and more beautiful, the visual effects will become better and better, and with the advancement of technology, the cost of quantum dot TVs and OLED TVs will also increase. It will gradually decline and prices will become closer to the people.
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When choosing a TV, isn't it often clear to salespeople that color, contrast, panel, and backlighting technologies are not well understood, but they often boast about how good the TVs sold are in these areas? In each case, it is increasingly difficult for people to know which brand of TV to purchase.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.
February 07, 2023