I’m sure both this term may have forced you to assume that both the mentioned technologies are the same. If so then sorry you are completely wrong.
They both have many differences and are two different technology as a whole. Today, all the T.Vs, gaming monitors and other display devices are making use of one of the above tech. Therefore, it is wise for us to comprehend their principle, working, merits and demerits.
So, the main focus of this article is to understand what makes them different.
But before starting the main topic of discussion lets brush through QLED and OLED.
The full form of QLED is ‘quantum light emitting diode’. This is a display technology helps to manufacture display devices which use quantum dots, semiconductor nanocrystals which are capable of producing pure monochromatic red, green and blue light.
This display technology has many layers about which we will discuss in the later section. But there is a layer called the QD layer which converts the backlight to emit pure basic colors which improve display brightness and color gamut by reducing light losses and color crosstalk in RGB color filters.
Moreover, this technology is used in LED-backlit LCDs. Though it is applicable to other display technologies which use color filters, such as white or blue/UV OLED.
Quantum Dots are either photo-emissive [photoluminescent] or electro-emissive [electroluminescent] which allows them to be readily incorporated with any new display architectures.
Furthermore, Quantum Dots naturally produce monochromatic light. Therefore, they are more efficient than white light sources when color filtered and allow more saturated colors that reach nearly 100% of Rec. 2020 color gamut.
How Does QLED Work?
This technology, known as the Quantum Dot LED has a layer or film of quantum dots on the front of a regular panel. Yes, you guessed it right the panel is nothing but a LED backlight panel.
Furthermore, the layer comprises small particles each having size ranging from 2 to 10 nm. Moreover, these particles emit its own individual color which depends on their size. As we discussed above the particles vary in sizes, as a result, they have a different wavelength. This triggers the particles to produce a variety of light.
According to Samsung, QLED is capable of emitting over a billion different colors. This was all about QLED. For brushing through OLED, you can this article of mine on OLED.
So, we are ready to now compare both these technologies. Let’s Begin –
The factors of comparison are listed as follows –
- Color Space
- Black Level
- Response Time
- Viewing Angles
- Life Span
- Screen Burn-In
- Power Consumption
QLED vs OLED: Which Is Better?
Originally, LED display was already good at the brightness. Therefore, the victory of technology depends on how much improvement is possible. OLEDs are good at black levels.
Therefore, when we start from perfect black the perceived contrast requires less intense brightness in those areas for HDR programming is similar to that of QLED display. But this is true only for a dark room.
QLEDs has an advantage in brightness over the OLED. QLEDs has almost the same level of brightness in the dark room. But in rooms with ambient light, QLEDs have a head over the OLED.
Furthermore, the reason for this is that the addition of quantum dots result in an even brighter display than the OLEDs. Also, QLED display is known for superior ‘color volume’ which means that the tech is successful in making the colors bright without losing saturation.
Therefore, clearly, the winner here is QLED.
As we read above that the QLEDs are better at ‘color volumes’. Similarly, they are also better than the OLEDs when it comes to color space, color accuracy, and color brightness. Earlier, OLED was the one with great achievements in this category but now QlED has made it way ahead OLED.
Therefore, here too the winner is QLED.
We all know the importance of dark blacks in improving picture quality. Black level is the factor that decides the contrast of the display. In order, to view other colors better the black area of the screen should be dark and deep.
Moreover, till now OLED is the ruler of the Black Level. Furthermore, OLED display is not encountered with the problem that QLED faces.
QLED does improve the black level performance of LED but they still rely on backlights shining behind an LCD panel. QLEDs suffer an effect called ‘light bleed’.
What happens here is, as the backlight spills through on what is supposed to be a black section on the screen. The result obtained is a slight haze or halo around objects with boundary. Therefore, the distinctness of the boundary is no more present and blur lines appear instead of sharp.
Most importantly, Samsungs QLED has taken a great leap in the previous year providing the black level performance to the level of OLED. For now, OLED still stands ahead of QLED but we may find things changed by 2019.
Therefore, the winner for Black Level performance is OLED.
Response time is the time taken by each diode to change from ‘on’ state to ‘off’ state. Advantages of faster response time are that it reduces motion blur and artifacts.
No doubt the winner for this factor is OLED. If you went through my article on the OLED. You would have learned that OLED illuminates each and every diode for a single pixel. Whereas, in QLED the diode illuminates a cluster of pixels. Therefore, OLEDs have a better response time than the OLEDS.
Here again, the winner is OLED. Because for QLED, the best viewing angle is the center. Moreover, the picture quality diminishes as we move away from the center, let is be sideways or up and down.
Furthermore, this varies as per the model, as the latest T.V. models of Samsung are using QLED display with some updated feature and anti-reflecting which reduces the viewing angle issue.
Even though LG produces some of the great panels called the ‘IPS’ which are far better than the VA LCD panel they are no competition to the OLED.
According to LG, you will have to watch the LG T.Vs with OLED display for 5 Hours per day for 54 years before the display fells to 50% brightness. Moreover, there are no such issues when it comes to QLEDs.
But I have mentioned in the OLED post that this problem with the OLED is getting better by time. So, we will have to wait to see how well OLED tech develops to tackle this problem.
Therefore, for now, I consider QLED to be the winner.
You also know the winner for this. Yes, QLED rule out OLED at this. QLEDs aren’t susceptible to burn-in. Whereas, for OLED displays, the compounds that light up the display degrade over time. This can have a critical downfall in user experience.
Also, this depends on the user as some user don’t identify the problem.
Therefore, from a technical point of view, QLED wins.
OLED displays don’t make use of backlight, therefore, they demand less power. Whereas, QLEDs make use of backlight panel. So, they consume slightly more power than the OLED display.
The winner is OLED.
Finally, the most important factor has come – PRICE. Earlier, a time was there where QLED was the latest tech and at the same time, it costs less than OLED because of less manufacturing costs, etc. But now with development in OLED technology, LG is now coming up with OLED displays that are matching the QLED price tag.
Therefore, this round has 2 winners both OLED and QLED [Draw].
So, you were there with me throughout the comparison. The winner for this comparison is no doubt QLED.