Question New Samsung Tv's That will compete with LG OLED TV

damailman79

Novice Member
I have seen several Articles about OLED TV picture quality Domination may be coming to an
end with the production of a new type of micro qdot design made by Samsung. Is this just a rumor or is a new technology
on the Horizon. It supposed to equal the black level higher Nit brightness and better color
 

dts

Distinguished Member
For now Oled is the best picture quality currently available,after owning various lcd tvs with led back-lighting nothing comes close with oled...Micro qdot is a fair few years away to be as competitive as oled as the prices have come down over the last couple of years as its just a showcase by samsung at the moment.
 

EndlessWaves

Distinguished Member
Pure LED displays have been around for years at a large scale and shrinking in size over all that time. The organic variant got small enough to be used for TVs first but the normal LEDs will follow at some point.

The latest TV industry term for normal LEDs small enough to form subpixels is MicroLED.

Micro qdot is a fair few years away
Samsung have reported they're starting production next year (QNED).

Of course Samsung have made such announcements several times in the past and it's not come to anything beyond a demo model available in limited quantities and not replaced.


Samsung's current main plans as far as we know are to manufacturer their own large OLED displays but to go for single colour OLEDs and get quantum dots to the point where they can substitute for colour filters.


Quantum dots currently form an alternative to LED Phosphor coatings. Something that sits at the back of the screen producing a white light that goes through the LCD panel and gets filtered into different colours by colour filters at the front of the screen.

The next expected use for quantum dots is to have them replace those colour filters.

So you have a bare, single colour (typically blue) LED light source without phosphors or a quantum dot film and that gets manipulated in brightness by the LCD matrix or the OLED electronics, then the result is converted into colour by quantum dots at the front of the screen.

This gives better viewing angles because the light is being generated by the quantum dots and doesn't have to travel forward through many layers.

It gives better efficiency because you're converting the light rather than filtering it - almost all the light from the backlight unit is being seen rather than 2/3 of it being blocked out. This may well translate to higher brightness for OLEDs, although Samsung are supposed to be using the most fragile blue OLED emitters so a lot of it will likely go to letting the light source be run at a lower current for the same brightens (to extend lifetime).

It also gives better colours because the current colour filters in use are one of the major factors limiting the purity of the colour primaries that can be generated. That is, there's some red leaking into the blue and so on. The light generated by quantum dots is pretty narrow spectrum, so using them instead of colour filters should be a significant improvement.

Samsung are having to swap to OLED because quantum dot colour converters (as they're often known) have proven tricky to get working with the polarisation requirements of LCDs.

QDCCs are also applicable to other types of display, such as MicroLED.


There's also a third use of quantum dots envisaged where you'd dump the light source entirely and have the quantum dots emit light when electricity was applied to them. This goes by various names, but usually featured the word emissive in it somewhere.


Samsung have a habit of changing terminology but as far as I'm aware they current usage is as follows: QD-OLED is the QDCC-based OLEDs, QNED is a single colour MicroLED with QDCCs and QD-LED is the electroemissive QD display.


It's worth saying that it's not just Samsung working with quantum dots. LG and the other big players are researching this too. Samsung may have made all the marketing noise so far, but don't assume they'll be the first to introduce any given tech.


QDCCs do look close so I'd expect an improvement in colour on OLEDs generally over the next couple of years and some lifetime/brightness improvement. And if the LCD-QDCC compatibility issue gets solved then LCD panels will no longer have to worry about viewing angles which could potentially mean a contrast boost there.

A new light source or a practical electroemissive implementation to replace OLED/Backlit LCDs and give the full HDR brightness range doesn't seem like it's as close though.
 

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