How OLED works
At first glance, OLED and QLED TVs are not very different. However, if you are familiar with their technical characteristics, you can immediately distinguish the two panels.
On an OLED TV, each image point consists of two electrodes. One of them is transparent. There are semiconductor layers between the electrodes, the glow of which is controlled by the current strength.
Each point in the image glows by itself. Compared to LCD screens, this display does not require a backlight, which makes OLED panels very flat. In addition, OLEDs boast higher contrast and deeper blacks: pixels are simply not backlit to create black.
How QLED works
Samsung has developed a TN-based QLED. The technology eliminates many of the disadvantages of OLED, but it also has its drawbacks.
The so-called quantum dots work on the QLED display. These are nanocrystals made of semiconducting materials that absorb light and then re-emit it.
The pixel color depends on the size of the quantum dot core. Accordingly, the QLED display can be adjusted even more precisely than OLED.
However, QLED technology is based on a conventional LCD, as quantum dots need backlighting.
According to the assurances of the developers, that is, Samsung, QLED displays are ahead of OLED in terms of contrast and brightness. Even if you look at the QLED screen from a very wide angle, the image will not appear darker. In addition, these monitors cover the DCI-P3 color space, which allows the use of colors in the digital cinema standard.
QLED vs. OLED: which is better?
While LG, Sony and Panasonic are betting on OLED, their competitors Samsung, Hisense and TCL are focusing on QLED. Today, it is difficult to say whether any of these technologies will come out on top in the future.
OLED is currently used on smartphones and many TVs. However, large OLED TV monitors are relatively expensive to manufacture. However, richer blacks, faster response times, and lower power consumption are serious benefits.
Samsung developed QLED technology primarily for cost reasons. Such matrices consume a little more power compared to OLED, but at the same time have a higher brightness and, therefore, contrast. If QLED becomes even cheaper to manufacture in the long term, and if Samsung fixes the existing shortcomings of its matrices, the technology could become dominant in the TV industry .
However, nowadays both OLED and QLED have their own individual strengths, so the overall assessment is not that one technology is better and the other is worse.