QLED vs OLED, not the same tech.

Update: OLED is not without it’s issues. One issue is reverse vignette, this is where the screen appears darker on the inside than the outside. Vignette is an effect that you see in some photos and even in movies, inside is brighter than the outside. Sometimes done purposefully, other times it’s due to the use of a wide angle lens, it bends the light in such a manner that it creates the effect. You can remove reverse vignette on an OLED panel by adjusting the OLED light, contrast, and brightness of the screen. This is not noticeable in content however, and you really have to look for it in order to see it.

Vignette effect.

/Update.

I just saw what Samsung is charging for their new QLED TV sets, and are they insane? They are marketing their new television line as some form of LED technology, then pricing it similar to what LG is charging for their OLED sets. Well let me tell you, one is better than the other. I’m writing this article in the hopes that you won’t get fooled in to buying one of those over priced LCD screens from Samsung.

There are two types of OLED (Organic Light Emitting Diode) technologies. W-OLED and RGB-OLED. Samsung bet all it’s money and research on RGB OLED, and lost. They have since dropped out of the OLED panel race. Due to RGB-OLED high price and degradation of the blue OLED pixel this technology proved to be too expensive to manufacture for large format displays. LG opted for the W-OLED or White Oled technology, which is a white LED with RGB filters. LG won, this is the perfect OLED technology for large format displays and soon other manufacturers will follow LG in their footsteps.

After dropping OLED panels as a display technology Samsung released new branding for their LCD panels, they called this QLED or Quantum Dot Light Emitting Diode. The description of this technology is somewhat based on a lie or false promise. I believe this branding is meant to fool the consumer into believing they are buying something that the technology is not. There are no Light emitting diodes or LEDs inside the QLED panels. QLED is a passive LCD screen with a quantum dot colour filter and LED edge lighting. The only difference between QLED and an LCD/LED TVs (LED is an LCD panel with LED edge lighting) are the quantum dot filters, everything else is business as usual.

QLED sounds like OLED, but OLED it is not. While the W-OLED and QLED technologies on paper may look and sound the same, the name is where this similarity ends. I believe that Samsung QLED technology is inferior to LGs OLED and Samsung will lose a lot of market share due to it’s price and the underlying technology of using LCD panels.

OLED is an emitting technology, each pixel is capable of producing it’s own light. Benefits to this are that OLED panels have infinite contrast ratios as each pixel can be individually turned off and on. Blacks are true black, similar to what plasma and crt televisions were capable of offering in the past. OLED is a natural replacement for Plasma Television owners and Home Theater enthusiasts. OLED screens can be viewed in a bright room, even when you have sunlight hitting the screen.

QLED on the other hand is a LCD panel with a passive colour filter(quantum dot layer) and an edge LED array which is used as a back light for the screen. If sunlight hits your screen it renders the image unwatchable. QLED sets might be held to a higher production standard than normal LCD panels however they still come with issues such as banding, light bleed, uniformity concerns, and motion blur. Even with local dimming that QLED panels possess, they have a lot of light bleed. In bright rooms, unlike OLED, QLED screens wash out and become unwatchable. In dark rooms the light bleed from the back light detracts from the viewing experience.

OLED sets have virtually no motion blur, no light bleed, no banding, near perfect uniformity, and are perfect for viewing at an angle with virtually no colour shift. I say virtually because sometimes the light refraction coating on top of the screen can make whites appear with a slight pink/purple tint. This happens primarily when viewing the screen at an angle. The tint shift effect of the refraction coating is not very significant, and even with this shortcoming of the LG OLED screens they still look much better than any high end LCD panel I have laid eyes on. Have a look at the picture it demonstrates the coating tint shit effect. Note the left side of the screen is slightly warmer than the right side.

Yes quantum dots much like OLED do produce more saturated colours. But at the price Samsung wants to charge for a set you are better off picking up an OLED set from 2016. The 2016 LG B6 series can be picked up for around $ 2500 USD, and I guarantee you the picture quality is better than anything Samsung can offer for twice the price in their QLED lineup. Sony and others are also getting into the OLED Television game and some more sets are on the way to market. OLED prices are being driven down and they are becoming more affordable. QLED might soon be a technology of the past. If Samsung is not able to decrease the price and improve the quality of QLED displays OLED will be the clear winner. Even with some of the OLED shortcomings, such as brightness fading, this technology has a lot more benefits than QLED. I use mine as a monitor too, while there is some image retention I have not noticed it and retention on W-OLED is not permanent. OLED sets are closer to the picture quality of CRT and Plasma televisions than any LCD on the market right now. Also SDR (vs HDR on Samsung) content looks much better on an OLED panel.

The bottom line is Samsung could not afford to stay in the OLED game with their RGB-OLED tech. Now Samsung is trying to sell you an inferior technology marketed as something that it can not compete with. W-OLED screens are cheaper to produce and produce a better visual experience.

References:

https://en.wikipedia.org/wiki/Quantum_dot_display

https://www.oled-info.com/oled-tv

http://www.businesskorea.co.kr/english/news/industry/2891-w-oled-vs-rgb-oled-samsung-lg-show-different-techs-large-displays-ces-2014

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HDR is here, sigh…

First, here is a good quick article on the difference of 8-bit vs 10-bit colour. Give it a quick one, two. Thumbs up the guy that took the time to write that.

My opinion is as follows.

First HDR should not be called HDR. It should be called Colour+ or something. Because it’s not what traditional HDR is or does. There are 3 HDR formats as of this writing, HDR, HDR10+ and, Dolby Vision.

HDR offers a singular benefit which is the colour depth, but as is with Dolby and Samsungs HDR10+ everything else about it is a gimmick. Just like Curved screens, and the likes of 8K Televisions. Perhaps 8K is useful for larger cinema screens but to me as a consumer 8K won’t offer any value in the near future. HDR offers a singular benefit, this is the wider colour gamut or depth(10 bit vs 8 bit). This has been a long ways in the making and started in the days of DVD past.

While yes the capability of the wider colour gamut or depth is welcome, things such as changing meta data is riding on borderline gimmicky and stupid. Also I would prefer there be no changing meta data in my video streams, thank you very much. I’d rather my Television have less capability to spy on me than they already do. I’m looking at you Samsung. I don’t own any Samsung products by the way, and there is a good reason for that, explosions and spying aside, I don’t buy into what they sell. While LG has adopted HDR and Dolby Vision(Netflix), Samsung has opted for HDR and HDR10+(Amazon). Amazon opted to adopt the HDR10+ standard.

I have experienced both Netflix and Amazon HDR, except for HDR10+ on Amazon. Based on my experience I will say this; the quality of Netflix and Dolby Vision leaves something to be desired. While it can offer benefits for edge lit LCD panels I see no benefit for OLED TVs. The idea behind Dolby Vision is such that it adjusts the contrast and brightness levels so that one can see the darks or shadows in a scene better and with greater detail than before. Is this true? Yes, somewhat but it comes at a price. To me it reeks of gimmick that only Edge Lit LCD panels benefit from. Let me explain. The problem with edge lit LCDs is that if a single pixel on the screen needs to be lit, and depending on the TV weather it has local dimming zones or not, the entire screen or sections of it will be lit up with the back light to provide illumination to the single pixel. LCD pixels are a passive technology and do not emit light. That is not the case with OLED. This means that on LCD/LED/QLED panels you will see a beam of light dropping down from the top to the bottom for a single pixel on an edge lit LCD panel, or LED panel as the manufacturers like to call them. QLED does something similar as well. While Dolby Vision aims to minimize this. Testing DV(Dolby Vision) on the LG 65UH8500 which is an LED edge lit LCD TV, this effect is very noticeable. Dolby Vision somewhat corrected this problem, but I also noticed that the contrast, the whites and, overall brightness of the image suffered in DV. Having watched and tested many DV shows, it was all the same across the board. Most noticeably in Luke Cage, DV rendered the image and show unwatchable and I had to make adjustments to the DV settings. Note that this was a calibrated television screen. In Marco Polo it did improve the dark scenes, however during the bright scenes I noticed that the colours and whites were way off. The whites weren’t white anymore and colour had a dark brown tint to it. But then again Netflix streaming quality is nothing to rave about. While Amazon streaming quality is slightly better than Netflix, this is only true for their UHD stuff. Also Amazon’s HDR implementation is a little simpler than DV and having watched the Grand Tour in HDR I can say, it’s just ok. HDR is simple and does what it’s supposed to without gimmicks. It adds a larger colour gamut, while HDR10+ and Dolby Vision add changing meta data to the stream. Thanks but no thanks.

The likes of 4 HDR standards exist right now, or soon will. Each vying for TV supremacy.
This smells to me like the next format war, Beta Max vs VHS, HD-DVD vs Blu-Ray, well Dolby Vision vs HDR10+ is here. So get ready folks, get ready to stop buying new TVs because a new format war is about to come to your living room.

Also did you know that that UHD television in your living room will not display UHD Television content for a long time, if ever, except for a couple channels. For the most part TV producers opted for HDR instead of UHD resolution. On top of that, said live television HDR format is a new standard which has not been added to any TV manufacturers lineups yet. Planned obsolescence? Maybe. Who knows maybe it’s just a firmware update, but if you’re dreaming of watching sports in UHD, think again, it might not ever happen. Yes Direct TV streamed some UHD channels last year, but have a look around, most Television broadcasts are still in 720p or 1080i, nothing has changed in the last little while.

So as it stands right now the only benefit HDR offers is via UHD-BluRay. You get uncompressed HDR video with wider colour range and uncompressed audio. However, UHD-BluRays aren’t flying off the shelves either. I have a sneaking suspicion that UHD BluRay will go the way of BetaMax, HD-DVD, and the Dodo. As such I could not recommend a new LCD panel that supports HDR at the moment to anyone. Let alone UHD LCD panel, that is unless you plan to use it with a PC. There really is no benefit at the moment to the average consumer purchasing a UHD TV unless you are buying a large format screeen, 80″ + I’d say. Be patient, sit and wait, watch, and then make an informed purchase.

If you’re are going to upgrade your LCD panel do it because you’re upgrading it to an OLED TV. That is the single best upgrade you can make to your TV, you will be stunned at the difference between OLED and LCD. Once you look at OLED you will realize how trashy LCD, LED and, Samsung’s QLED panels really are. This is truly the future of Television displays, and Goggles rumored $800 Million investment in LGs OLED technologies is proof of that. Christ, go to any robotics hobby shops and they are stocking OLED monochrome displays, some even colour. OLED is the future display tech for the time being. QLED or Quantum dot Light Emitting Diodes are just LCD panels with a gimmicky name to try and fool you into buying Samsung’s panels which are LCD/LED edge lit displays of the last 10 years past.

OLED or go home I say. This is what the industry should be concentrating on.

References:

http://www.techhive.com/article/171223/10_bit_color.html

http://www.digitaltrends.com/home-theater/directv-4k-uhd-masters-broadcast/

http://www.cnbc.com/2017/04/10/google-offers-at-least-880-mln-to-lg-display-for-oled-investment-electronic-times.html

http://www.trustedreviews.com/opinions/hdr-tv-high-dynamic-television-explained

https://en.wikipedia.org/wiki/Ultra-high-definition_television#Americas