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Does this new OLED technology brighten up TVs and smartphones?

OLED screens are superior to LCD-based screens. But they have one disadvantage: low brightness. This is mostly due to anti-reflection filters that absorb light. As it seems, researchers from England have now succeeded in solving this problem.

OLED screens are considered the best screens for televisions and smartphones. Why? They’re based on a technology with light emitting diodes – LEDs – which don’t only determine their own colour, but also generate their own light.

Reflective filters are used to prevent reflections on your TV or smartphone screen. But these filters come with a disadvantage: they absorb almost half the light-emitted by OLEDs. For this reason, the light-emitting diodes must shine particularly brightly to allow enough light to pass through the reflective filters.

Low maximum brightness: the weakness of OLED screens

Now researchers are said to have found a way to solve this efficiency problem. The big advantages: better contrast, longer battery life and less burn-in.

Organic LEDs and their chemical composition

How do OLEDs work? OLEDs are composed of thin films of organic molecules that create light with the application of electricity. Matching colour molecules then provide the colours. «O» in OLED stands for «organic», which means carbon-containing in chemistry.

Yeah, science: So <strong>funktionieren OLEDs</strong>
Background informationHome cinema

Yeah, science: So funktionieren OLEDs

It is precisely this chemical composition that researchers at Imperial College in London claim to have changed. At least, that’s what Phys.org reports and claims that the team around Dr. Jess Wade has developed a new type of OLED that is able to bypass the reflective filters without any losses by emitting polarised light.

Why polarised light?

With polarised light, there is no light loss and therefore improved maximum brightness. With simultaneous True Black, this results in even better contrasts and more intense colours than before.

At the same time, less loss of light also means reduced strength of light output. This is why the new OLEDs require much less energy. With a smartphone, for instance, this would result in a significantly longer battery life. Because the lifespan of such displays is doubled at the same time, the risk of burn-in is also reduced.

<strong>OLED und Burn-In</strong>: So steht’s wirklich um ausgebrannte Pixel
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OLED und Burn-In: So steht’s wirklich um ausgebrannte Pixel

And there’s more good news: According to the researchers, as Phys.org reports, this technology can be used for other purposes, too: polarised light is said to be suitable for storing, transmitting and encrypting data.

However, the most important question remains unanswered in the studies published in the scientific magazine ACS Nano. This is when the new OLED technology will be built into new OLED televisions and smartphones. I asked them but haven’t received an answer yet.

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Luca Fontana, Zurich

  • Editor
I'm an outdoorsy guy and enjoy sports that push me to the limit – now that’s what I call comfort zone! But I'm also about curling up in an armchair with books about ugly intrigue and sinister kingkillers. Being an avid cinema-goer, I’ve been known to rave about film scores for hours on end. I’ve always wanted to say: «I am Groot.»

7 comments

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User rem3_1415926

Klingt ein bisschen nach eierlegenden Wollmilchsau... Mal sehen was da dran ist und wie die technische Umsetzung dann tatsächlich aussieht

10.07.2019
User mindscope

Die Information, dass OLEDs ihre Farbe bestimmen können, stimmt so nicht, da ja jede Diode ihre fixe Farbe hat und sich die Farbe schlussendliche - je nach Hersteller - aus drei oder noch mehr Dioden ergibt.
Ansonsten interessantes Thema, bin gespannt, ob sich die Dinger mal in Grossserie produzeiren lassen.

12.07.2019
User Luca Fontana

So gesehen: jein. Jedes OLED-Pixel besteht aus mindestens drei Subpixeln. Dessen Dioden strahlen alle weiss. Ihnen vorgeschoben sind aber noch Farbfilter in den Farben Rot, Grün und Blau – das RGB-Sandwich. Kann natürlich von Hersteller zu Hersteller variieren. Bei LG Displays beispielsweise sind es vier Subpixel: Nebst dem roten, grünen und blauen Subpixel kommt ein weiteres Subpixel ohne Farbfilter dazu. Dessen weisses Licht wird ungefiltert weitergegeben, damit das OLED-Pixel als Ganzes heller strahlt.

digitec.ch/de/page/oled-vs-...

Das OLED-Pixel als Ganzes betrachtet kann also schon seine Farbe via Farbfilter über den Subpixeln selber bestimmen. Aber das geht so tief ins Detail, das ich mich für den kurzen News-Artikel hier bewusst kurz gehalten habe. Wo ich dir Recht gebe, ist, dass ich den Begriff «Diode» in diesem Zusammenhang falsch oder wenigstens zu sehr vereinfacht verwendet habe.

12.07.2019
User mindscope

Wenn du den Pixel als Ganzes meintest, hast du natürlich recht. War ja wirklich eher ein Kurzabriss zur Technik, da muss man manchmal ein paar Dinge unterschlagen und vereinfachn :-)

12.07.2019
User Luca Fontana

:-)

15.07.2019
Answer
User kiymichael

Das LCD hat Polarisationsfilter. Die schlucken auch Licht. Bis ein Forschungsergebnis in den Laden kommt, das dauert lange. 1987 wurden OLEDs erfunden. Wann waren sie verfügbar in TVs? 2007 war es als Sony den X-EL1 vorgestellt hat. 20 Jahre später. Warum schreibt ihr solche Artikel? Ausserdem ist der Artikel ist technisch ziemlich unpräzise geschrieben.

10.07.2019