What you need to know about buying a TV Screen materials and backlight technology
Release time:
2018-02-06 09:29
Source:
Like all electronics, there's one thing about screens that a lot of people don't understand. For example, if you or your family want to buy a flat-screen TV or monitor, you need to face a lot of parameters: resolution, panel type, backlight technology, etc. It sounds very complicated. However, if you want to buy the most suitable product for you, you still need to understand the differences in these key parameters, so you might as well briefly understand the following content.
Panel type:
TN
The TN screen we often say is actually the abbreviation of Twisted Nematic (twisted nematic) panel. In fact, you don't need to remember this complicated academic name, just remember: TN screen is the lowest-cost LCD panel, with the worst display effect and the narrowest viewing angle. Basically, most low-end monitors use this type of panel.
AND
As long as the VA panel is divided into MVA developed by Fujitsu and PVA developed by Samsung, it is relatively a compromise solution that is better than TN but still inferior to IPS. The VA panel has a better wide viewing angle, but it is still a soft screen (touching the panel with a finger will cause ripples), and the response time, viewing angle, and uniformity are not as good as IPS. This kind of panel is usually equipped on some high-end monitors.
IPS and PLS
Comparison of IPS (left) and TN (right) panel differences
There is no doubt that IPS is currently the best 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 the surface, and high-end TVs, mobile phones, tablets, and monitors are generally equipped with IPS panels. As for PLS, it is Samsung's standard IPS, which costs less, but is basically the same as IPS.
LED backlight technology:
LED TV uses light-emitting diodes to replace CCFL cold cathode fluorescent lamps to achieve better lighting and imaging effects. However, the development of LED backlight is still evolving so far, so it is mainly used in three types, and the display effects are also different.
Direct LED backlight:
Mainly, the backlight board is covered with LED lights to achieve uniform lighting effect. The feature is that the picture quality is exquisite, and the backlight source can be set in an area, that is to say, the so-called "local light control" technology, so as to achieve separate processing for different colors. However, this backlight technology will affect the thickness of the TV, so some TVs that sell ultra-thin are turning to another backlight technology.
Side entry LED backlight:
It is very easy to understand that the side-in LED backlight is to set up LED bulbs around the LCD panel to illuminate the LCD screen after shining on the light guide plate. Because there are fewer light bulbs, TV manufacturers design the TV body to be thinner and lighter. This technology is used in mainstream ultra-thin TVs on the market. However, due to some congenital defects, local light control cannot be achieved, and the color performance is not as good as that of the direct type.
Quantum dot technology:
The recently popular "quantum dot TV" is actually a new type of backlight technology. It is characterized by the use of nano-crystal materials instead of LED light sources to achieve a more pure and realistic backlight color, and to improve the color effect of LCD TVs to a level comparable to that of OLEDs. Therefore, LCD TVs using quantum dot technology are currently the best and most expensive in the market.
What about OLEDs?
As for OLED, it is actually a completely different display type, called Organic Light-Emitting Diode (Organic Light-Emitting Diode), which is completely different from Liquid Crystal. OLED is characterized by self-illumination (no backlight required), ultra-thin, bright colors, wide viewing angle, etc. At the same time, it can use plastic panels, which means it can be more flexible.
OLED TVs are without a doubt the best displays on the market today, with deep black levels and chromatic fidelity comparable to plasma without the limitations of plasma. However, because OLED technology is still in the development stage, there are problems of high cost and low yield, and the size is smaller than LCD screens, so the price of OLED TVs is very expensive. If you are looking for perfect picture quality and not bad money, OLED TVs from LG and other brands are the best choice.
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