What are the pros and cons of oled

OLED vs. QLED: which is better? - Differences as well as advantages and disadvantages

Although OLED televisions saw the light of day for the first time in 2004 by Sony, it took until 2012 LG released the first TV set with an OLED panel.

This laid the foundation stone for the devices that we see here and there in living rooms today - and that have been around for a number of years LG also the only one relevant manufacturers of OLED televisions.

Samsung has been trying for some time now with QLED to hold against. - But what are OLED and QLED at all? What are the differences between these two technologies; which technology is better - QLED vs OLED? - We explain that in detail in this article.



OLED: Why does it even exist?

Before we clarify what an OLED panel is all about, let's take a look at the underlying class of LCD televisions.

These work as follows:

1. LCD panels consist of a fine matrix of individual pixels. These in turn are made up of three adjacent sub-pixels, which are red, green and blue - RGB.

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2. If the entire screen is to display a yellow image, the display of each pixel is set in such a way that a strong yellow appears at the end. However, these pixels do not light up on their own - So you would see a black picture.

3. There is therefore a behind the LCD panel Backlight: It illuminates the pixels, the light penetrates them and in the end the color yellow arrives in your eye, which can be seen on the display.

This is how (in a simplistic way) every image is created on an LCD screen.

However, this also results in a problem that has not yet been resolved: The backlight is always on and cannot be deactivated individually.

In the meantime there are devices that offer LED lighting for certain zones of the visible surface - but this is also rather coarse-grained.

Since the backlight cannot be deactivated, so can not real black be generated.

Pixels that are turned off appear greyish when the brilliant white light from the backlight penetrates them.

The contrast ratio suffers from this: Colors are always slightly washed out, black cannot be represented. To address this problem, OLED was designed.



What is OLED? - The technology behind OLED

OLED stands for "Organic Light-Emitting Diodes" - in German: organic light-emitting diodes. Today, this technology is primarily used in OLED displays.

The main difference from OLED displays to QLED / LED displays is that OLED displays so-called. organic pixels have installed which shine independently can.

So you don't need a backlightbut send out the light itself. So if black is desired, the pixel simply switches itself off - and perfect black is achieved.

From a technical point of view, OLEDs consist of four organic semiconductor layers that are attached between two electrodes (one of which is transparent).

These four layers are a hole-conducting layer, a conductive polymer called PEDOT (EN), a recombination layer with the dye, and an electron-conducting layer.

Overall, these layers stacked on top of each other are no more than 200 nanometers thick. As soon as direct current is applied, the OLED lights up - and you see a picture.



What is QLED? - QLED displays in detail

Despite the similar spelling, they have QLED and OLEDnothing to do with each other.

The "Quantum Dot Light Emitting Diode" is not an (r) evolution of the LED: The trick is in a film that is attached between the liquid crystals of an LCD panel and the LED backlight.


Samsung - the only manufacturer of QLED panels to date - applies fine nanoparticles to this film, which have a marketing impact "Quantum Dots" were baptized.

These are supposed to solve a problem with LED backlighting: It is bluish in its original state and is then made to emit white light by painting it yellow.

However, this in turn has a negative effect on the display of red and green. The nanoparticles break the light into its components so that red and green are "washed clean" again - and since these colors are used together with blue to display all other colors in the spectrum, the result is a very true-to-color, intense display.



Effects of QLED in practice

If you stand in front of a QLED panel for the first time, you can see the following advantages compared to a conventional LCD panel:

Intense colors

Especially colorful content (perhaps documentaries about animals in a colorful rainforest) shine in new colors that sometimes leave reality behind in terms of color saturation. You can also reduce the effect in the option menus of these 8K TVs.

High brightness

A major advantage over OLED (more on that later) is the very high brightness presented by QLED televisions. This provides advantages, especially in conjunction with HDR content.

As with OLED devices, the difference is primarily visible in the appropriate content.

In cheaply produced TV dramas for the afternoon program you will have to look for the differences with a magnifying glass.



OLED vs QLED - the service life

One point at which the spirits keep dividing is the lifespan.

First, let's list some of the disadvantages of OLED technology: The lifespan of these devices is limited because organic phosphors naturally a certain Expiration date subject.

The manufacturers always give different information, but a good average is included about 20,000 hours. That is well above the value that was given in 2011: Back then it was only 5,000 to 12,000 hours. The comparison shows the progress of the technology over this time.

It remains to be seen whether the service life of OLEDs should really make you think.

A Calculation example shows what you are from 20,000 hours to expect: If you use an OLED television for two hours every day of the year without exception, you will 27.4 years Have fun with the OLED device.

You could only get problems if you use the device really intensively: If you watch series and films yourself while the children spend a few hours a day at the console, the maximum usage time is much worse.

QLED TVs do not have this problem: No organic substances are used there, Samsung provides the service life itself 60,000 to 100,000 hours at.

Even if these numbers were embellished by the manufacturer and only half remained in reality, this would still leave OLED monitors far behind.

For a really frequent use, we can therefore only recommend QLED technology with a clear conscience - currently. The exception is if you buy a new device every five years anyway - then you don't care about this point.



What can QLED TVs not do?

Backlighting is still used.

This means that a QLED television cannot display black as well as an OLED model.

You are looking for maximum contrast,there is no getting around OLED.

Continue to offer OLED televisions a outstanding viewing angle stability: It doesn't really matter where you look at the picture from. Colors and contrasts never turn negative.

There are also advantages in terms of power consumption and production: OLEDs may have a high purchase price, but they are very inexpensive to operate because the power consumption is low.

Due to the elimination of the backlight, manufacturers can also make OLED televisions extremely thin. Current OLED televisions are only a few millimeters thickwhat just looks very chic in the living room.

In comparison, QLED devices and normal LCD televisions are many times thicker and also weigh more.



OLED: the home theater dream?

Depending on the design, OLED panels can do not achieve such a high brightness like classic LCD screens with a backlight.

In a light-flooded living room in summer it may well be that not much can be seen on the television in direct sunlight.

Nibble on this problem OLED televisions for many years and it cannot be assumed that a solution for this disadvantage will be found in the near future - even if the brightness the devices do much further is than a few years ago.


This fact and the mentioned disadvantage of the service life have made OLED televisions a kind of TV enthusiast - for home cinema, for example.

If you only watch films and series occasionally, but then also intensively, without distraction and with a good sound system, this is it OLED televisions are currently the ultimate.

Nowhere else do you get a comparable picture quality - but it also has its price, especially with larger screen diagonals. Currently (as of February 2021), 65-inch models start at around 1,700 euros.

If you can darken the room and are a typical film enthusiast, for ultra HD, surround sound and best picture quality are just good enough is OLED the measure of all things.



QLED: just an interim solution?

In terms of image quality, you'll be using a QLED television only then one Advantage over OLED notice when you can make use of the high brightness.

That being said, next to that speaks significantly longer shelf life, just the price for the QLED devices: The 1,700 euros just mentioned for 65-inch OLED televisions have shrunk to "only" around 1,400 euros for QLED models.

This also reveals the problem with QLED televisions: The leap from LCD to OLED is immediately visible and a real aha experience that has not existed in TV equipment technology for a long time.

QLED, on the other hand, can only play to its advantage in well-lit rooms - apart from that OLED always one step ahead. With a technology that is newer than OLED, this may cause a bit of disillusionment.

So you can't get rid of the feeling that neither OLED and QLED are currently the best solution represent for all time - and that this is true, reveals a look at the next evolutionary stage.



Micro LEDs will dominate the future

We are still a long way from mass production, but in a few years we will Micro LEDs dissolve the problems of OLED and QLED in thin air.

Micro LEDs are microscopic LEDs, of which several million pieces per television which then illuminate each pixel individually.

This combines the individual pixel control of OLEDs with the very long service life of inorganic materials.

However, you shouldn't save for the time being: Firstly, the technology will be outrageously expensive to start with, just like the OLED devices were at the beginning, and secondly, we would not expect to be able to buy these devices in larger quantities before 2025.



At a glance: QLED vs. OLED in comparison

QLED vs. OLED - You can find them here Advantages and disadvantages the two display technologies OLED and QLED.


OLED pros and cons

  • Extremely good contrast values ​​that no other panel can match.
  • Minimal power consumption.
  • Very thin televisions possible.
  • Fast screen response times for gamers.
  • No adaptation of the content for HDR necessary.
  • The service life may be too short.
  • Maximum brightness limited.
  • Very expensive to buy.


QLED advantages and disadvantages

  • Intense colors and contrasts.
  • Very long service life of the panel.
  • Can be produced quite cheaply, even in extreme sizes.
  • Higher power consumption than OLED.
  • Not a perfect black.



Conclusion: OLED vs. QLED - what should I buy?

Are you looking for the current one best picture quality and don't you mind the two of them main disadvantages - the brightness and the lifespan -, leads OLED there is no way around it in 2021 either.

QLED In this sense, it is less of a direct competitor than an alternative: If lifespan and brightness do play a role, you won't make a mistake with the handle in Samsung's portfolio - and a little You save money at the same time.

Both solutions however offer one immediately visible, blatant gain in image quality compared to typical backlit LCD TVs.