In the past 10 years, people have been struggling with "buying plasma or LCD TVs." Now, plasma has completely withdrawn from the market. In addition to LED/LCD, the LCD industry has also derived new backlighting technologies such as quantum dots. The only exception is the use of organic light-emitting diodes OLED technology, completely different from the liquid crystal.
From a certain point of view, because of the self-illumination and the independent lighting characteristics of each pixel, OLEDs are superior in image quality and are considered as plasma substitutes. Of course, due to the cost relationship, OLED TVs are still expensive to develop today, and LCD TVs will not be overwhelmed by a lot of new technologies to enhance the display effect.
So, from a variety of details, which technology is better? Although we generally think that OLEDs represent high image quality, there are also some drawbacks. So, let's take a look at the details to see the fundamental differences and differences between LCD TVs and OLED TVs.
LCD TVs, especially LED-backlit TVs, have a variety of backlight designs, such as bottom, top and bottom, sidelight, global, and so on, which have relatively higher brightness, while OLEDs, although self-illuminating, have brightness aspects. It is slightly lower than the LED backlight.
2. Black level
In terms of black level, since each pixel of the OLED is self-illuminating independently, the color performance is more profound and natural. Regardless of which kind of backlight technology is used in LCD TVs, it will have some influence in achieving local dimming, which will affect the restoration of black effects.
Perhaps you have used a bad LCD TV or monitor, you will find its effect is white, the color reduction is extremely inaccurate, which is basically caused by poor contrast conditions. In addition, the contrast also affects the black level to some extent. Although contrast items are rarely tested in TV evaluations, relatively speaking, OLEDs can produce better contrast without any smudging.
Whether it is LCD or OLED TV, the highest resolution standard currently meets the 4K Ultra HD standard.
5. Refresh rate and motion blur
Relatively speaking, the LCD screen has a higher refresh rate and motion blur processing, and the current version of OLED generally has more obvious motion blur effect. Cnet tests found that even with the use of black frame interpolation to solve motion blur, LCD TVs generally perform better than OLEDs.
6. High Dynamic Range (HDR)
HDR is a technology that can significantly improve picture quality, and it has superior performance in terms of contrast, brightness, and balance. At present, only a few LED TVs support this function, and HDR-compatible video content (such as 4K blue light) is required for the best results. On the OLED side, although LG has demonstrated HDR technology, its 2015 model does not really have this feature.
7. Color gamut expansion
Another widely used technology adopted by television this year is color gamut extension technology. For example, popular quantum dots can make the TV display a wider range of colors to achieve different display styles or enrich its own color effects. As for OLEDs, currently LG technology uses blue, yellow phosphors, and red-green-blue filters to create the ATSC color spectrum, and it is unclear whether future color gamut expansion can be achieved.
8. Viewing angle and uniformity
Although technologies such as IPS and curved screens can improve the viewing angle of LCD screens, there are still some dead ends. OLEDs do not have any perspective issues, and they are basically consistent from an extreme perspective.
Uniformity refers to the consistency of the screen backlight, OLED performance due to self-luminescence is more uniform, and the liquid crystal will have a light leakage phenomenon to a certain extent because of the different backlight positions, especially for most side-view LEDs.
9. Energy consumption
The power consumption of LCD TVs depends on the backlight settings, so the LED backlight design saves more power than the individual light-emitting OLEDs of each pixel. According to the Cnet test, the 55-inch LCD TV using LED technology costs about 14 US dollars (about 87 yuan), while the same size OLED TV is 45 US dollars (about 280 yuan).
Any flat-panel TV may have a "burn-in" phenomenon, that is, a permanent image remains. However, this probability is very small for LCD screens, and OLEDs are currently uncertain. In general, we don't want to display fixed images all night long while using TVs. As for the service life, no matter whether it is LCD or OLED, there is no authoritative life-span statistics for the time being, so the industry generally believes there is not much difference.
Obviously, LCD TVs are much cheaper than OLED TVs, and the cost difference may be up to 5 times. However, OLED TVs are getting cheaper and cheaper, which is worth noting.
to sum up
Obviously, both liquid crystal and OLED have their own advantages. From the current point of view, OLEDs have better results in terms of image quality, contrast, etc.; and LCD TVs are also struggling to catch up and compete through HDR and expanding color gamut. Of course, the liquid crystal field has more models and sizes, and more price options, making it more suitable for ordinary families. For users who are looking for high-end visual enjoyment, OLED is a better choice.