OLED TVs: Technology Advancements Thread - Page 470 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 1209Likes
Reply
 
Thread Tools
post #14071 of 14097 Old 07-29-2017, 10:44 PM
Member
 
nodixe's Avatar
 
Join Date: Nov 2009
Posts: 148
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Liked: 22
Supposedly since lg is dropping passive 3d the pixel structure can be redesigned. Passive 3d requires vertical space betwern pixels to reduce cross talk(?) but also reduced the brightness. This redesign is supposed to be released in 2018.

Sent from my SM-G935V using Tapatalk
nodixe is offline  
Sponsored Links
Advertisement
 
post #14072 of 14097 Old 07-30-2017, 11:40 AM
mnc
AVS Forum Special Member
 
mnc's Avatar
 
Join Date: Mar 2003
Location: Dallas, GA
Posts: 2,728
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 753 Post(s)
Liked: 564
Quote:
Originally Posted by nodixe View Post
Supposedly since lg is dropping passive 3d the pixel structure can be redesigned. Passive 3d requires vertical space betwern pixels to reduce cross talk(?) but also reduced the brightness. This redesign is supposed to be released in 2018.

Sent from my SM-G935V using Tapatalk
I'm anxiously waiting for details on 2018 models for this reason. Hopefully they will hit 1000 nits on 10% windows and 250 nits full screen!

NHT speakers, Denon 4520, Panasonic 65VT50, DUAL PSA XS30SE's
mnc is online now  
post #14073 of 14097 Old 07-31-2017, 09:43 AM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Do any of the OLED gurus on the board understand what the impact of agong OLED layers will be in a WOLED stacked architecture (especially blue)?

Time-to-half-brightness of Blue is supposed to be ~30,000 hours.

So after 30,000 hours use of a specific subpixel on a WOLED, does that mean light output will remain similar to what it is on a new subpixel but composition of white light output of the aged subpixel will have shifted away from blue and more strongly towards red/green (yellow)?

Or will total light output of an aged subpixel decrease in addition to a shift in whitepoint towards yellow?

On a more detailed level, as blue OLED materials age, does their effective 'resistnce' remain constant and it is just the light ouput efficiency generated by a similar current that decreases or does the effective 'resistance' of the blue material increase so that current level for a given voltage decrease (or voltage level required for a desired current increases) and is does efficiency of blue light generated from that reduced current level the same or does efficiency decrease in addition?

We're starting to get first user reports of WOLED TVs exceeding 2500 hours and approaching 5000 hours and I'm trying to understand what the expected impact of aging OLED layers should do to light output as use starts getting into the range of blue half-life specifications...
fafrd is offline  
 
post #14074 of 14097 Old 07-31-2017, 10:11 AM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Quote:
Originally Posted by fafrd View Post
Do any of the OLED gurus on the board understand what the impact of agong OLED layers will be in a WOLED stacked architecture (especially blue)?

Time-to-half-brightness of Blue is supposed to be ~30,000 hours.

So after 30,000 hours use of a specific subpixel on a WOLED, does that mean light output will remain similar to what it is on a new subpixel but composition of white light output of the aged subpixel will have shifted away from blue and more strongly towards red/green (yellow)?

Or will total light output of an aged subpixel decrease in addition to a shift in whitepoint towards yellow?

On a more detailed level, as blue OLED materials age, does their effective 'resistnce' remain constant and it is just the light ouput efficiency generated by a similar current that decreases or does the effective 'resistance' of the blue material increase so that current level for a given voltage decrease (or voltage level required for a desired current increases) and is does efficiency of blue light generated from that reduced current level the same or does efficiency decrease in addition?

We're starting to get first user reports of WOLED TVs exceeding 2500 hours and approaching 5000 hours and I'm trying to understand what the expected impact of aging OLED layers should do to light output as use starts getting into the range of blue half-life specifications...
Found this from a couple months ago: http://www.siliconinvestor.com/readm...&showwhorecd=1

So looks as though slacker and ynotgoal are our two most seasoned OLED experts and the questions I posted above are directed toeards them (unless their is anyone else on the board with a similar level of expertice).

And this information from silicon advisor raises another few questions:

1/ Are we expecting any changes to the WOLED stack for 2018? (I suppose we might learn something at CEDIA in another month+).

2/ Do we know whether LG made any changes to the WOLED stack between 2016 and 2017 generations?

3/ Are the 2017 WOLEDs the new 3-layer stack or the older 2-layer stack?
fafrd is offline  
post #14075 of 14097 Old 07-31-2017, 10:36 AM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Quote:
Originally Posted by fafrd View Post
Do any of the OLED gurus on the board understand what the impact of agong OLED layers will be in a WOLED stacked architecture (especially blue)?

Time-to-half-brightness of Blue is supposed to be ~30,000 hours.

So after 30,000 hours use of a specific subpixel on a WOLED, does that mean light output will remain similar to what it is on a new subpixel but composition of white light output of the aged subpixel will have shifted away from blue and more strongly towards red/green (yellow)?

Or will total light output of an aged subpixel decrease in addition to a shift in whitepoint towards yellow?

On a more detailed level, as blue OLED materials age, does their effective 'resistnce' remain constant and it is just the light ouput efficiency generated by a similar current that decreases or does the effective 'resistance' of the blue material increase so that current level for a given voltage decrease (or voltage level required for a desired current increases) and is does efficiency of blue light generated from that reduced current level the same or does efficiency decrease in addition?

We're starting to get first user reports of WOLED TVs exceeding 2500 hours and approaching 5000 hours and I'm trying to understand what the expected impact of aging OLED layers should do to light output as use starts getting into the range of blue half-life specifications...

Found the attached graph.

It indicated that for 30,000 hour half-life (brown 20 mA/cm^2 curve), light output is reduced by ~10% after ~1000 hours).

And I've seen some reports that LG is claiming a 100,000 hour lifetime for their WOLED TVs (purple 10 mA/cm^2 curve) which would indicate that light output is reduced by about 5% after 1000 hours...).

The Wiki page on OLEDs indicates that the aging process involves loss of light generation efficiency only, so as an OLED ages through use, light output decreases while current/resistance remains roughly constant.

We've got several users who watch what many would consider to be excessive display of a TV/cable channel or two with static logo components reporting that they are experiencing signs of burn-in after ~500 hours of display of those static logos (25% - 40% of their viewing).

Those subpixels, especially for yellow/orange/red logos are getting 500 hours of repeated saturated use while surrounding subpixels are getting used as little as 1/16th that level (1 of 4 random colors at random intensity level).

These aging curves are convincing me that if you have a cluster of subpixels experiencing 500-1000 hours of high-saturation use while the overal panel subpixels of the same color are experiencing only 30-65 equivalent hours of use, that difference is likely to show up as subpixels whose light output is darker by ~5-10%...

Could this be behind the several reports of burn in by heavy TV/cable single-channel users we are seeing?
Attached Thumbnails
Click image for larger version

Name:	image.png
Views:	61
Size:	55.6 KB
ID:	2261600  
joys_R_us likes this.

Last edited by fafrd; 07-31-2017 at 03:27 PM.
fafrd is offline  
post #14076 of 14097 Old 08-01-2017, 09:57 AM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
https://www.oled-info.com/cynora-edg...p-blue-emitter

"In May 2017 Cynora announced a new blue TADF emitters that achieves a 15% EQE at 1000 nits with an emission peak of 470 nm and a LT97 of > 90 hours (at 700 nits) on a device level. Cynora has stated several times that it aims to commercialize its first highly efficient blue TADF emitter by the end of this year.

According to Cynora, the performance requested from customers is an EQE (at 1000) of over 15%, a lifetime (LT97 at 700 nits) of over 100 hours and a wavelength of 460 nm (color purity FWHM 60 nm)."

According to this, they need to improve from LT97 >90h to >100h and from emission peak of 470 nm to 460 nm, which they believe they will achieve by year-end.

Do we believe it (both that these specs are what needs to be achieved for blue TADF to be adopted and that Cynora will get there by year-end)?
fafrd is offline  
post #14077 of 14097 Old 08-01-2017, 12:34 PM
AVS Forum Special Member
 
Rich Peterson's Avatar
 
Join Date: Jan 2000
Location: St Paul, MN
Posts: 2,813
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 145 Post(s)
Liked: 167
^^^Readers may remember this article from a few weeks ago: LG aims to adopt a blue TADF emitter in its 2018 OLED TV stack
Rich Peterson is offline  
post #14078 of 14097 Old 08-01-2017, 02:35 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Quote:
Originally Posted by Rich Peterson View Post
^^^Readers may remember this article from a few weeks ago: LG aims to adopt a blue TADF emitter in its 2018 OLED TV stack
Nothing but the title makes any mention of 2018.

From the Cynora article, while LG may start working on TADF in 2018, the techology won't appear in products begore 2019 (at the earliest):

"Cynora does update now that it is targeting 2019 for actual production of AMOLED displays with its TADF emitter. Mass production of Cynora's blue TADF emitter will be ready in Q1 2018, but panels makers usually take about a year to bring a panel to the market. Cynora is partnering with global chemical makers and has yet to select a company to do its production when its materials are ready."
fafrd is offline  
post #14079 of 14097 Old 08-02-2017, 07:37 PM
Newbie
 
Join Date: Jan 2017
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked: 0
Quote:
Originally Posted by rogo View Post
It's really noteworthy how much the TV forecasts have slowed, basically the timetables have shifted out and to the right by what now amounts to 5+ years since the original "launch" but is still 2-3 years since the more general promise of continuation with OLED TVs / expansion / etc.

Consider that 6 million TVs (with LG as the sole supplier more or less) means that <3% of TV sales globally will be OLED in 2020. The market share for OLED isn't even remotely threatening where PDP / plasma was in its heyday when that segment closed in on 10%. It seems likely OLED won't hit 10% of TV sales until the middle of next decade.
Recode recently reported that the average number of TVs in homes has been declining from 2.6 TVs per home in 2009 to 2.3 in 2015. I wonder if this is contributing to the slow OLED out-roll.

https://www.recode.net/2017/7/30/160...n-home-decline
austinsj is offline  
post #14080 of 14097 Old 08-03-2017, 04:50 PM
Member
 
Join Date: May 2015
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked: 4
Posting full notes, they feel PHOLED blue is getting close and printing is not


UDC Q2 2017 CC notes - 8/3/17
- Blowout quarter and guidance raised. Revenue to $102.5M , OpInc $60.5M, Net income $47.2M or .99/sh. Guidance raised to $285M-$300M for the year. Non-Samsung royalties up to $8.7M
- Had some very positive comments on blue progress in the prepared remarks. Later in Q&A said their confidence in blue continues to grow and they are getting close to commercial specs.
- Commercial materials $30.9M. Dev materials $15.9M
- Gave total material sales by color vs. commercial only in prior q's, and gave updated numbers for comparison.
Green - $32.1M in Q217 VS $33.3m in Q117 and $15.3M in Q216
Red - $13.7M in Q217 vs. $12.8M in Q117 and $6.7M in Q216
- GM's 79% for Q2 vs 75% in Q216. Still expect full year GM's 70-75%
- OPEX to grow 10-15% YoY
- Tax rate 23% in Q2, expect 25% for 2017 and 20% for 2018 and beyond.
- $380M in cash at EOQ, looking for opportunities to use their increasing free cash flow.
- Expect pricing discounts to begin kicking in on the newer materials in Q3.
- China predominantly BOE.
- Did sell some developmental host, but have not won any customer deals and don't expect to in the foreseeable future.
- PPG expansion will be completed in Q3.
- Still do not expect printing of materials in the foreseeable future, including P10.
- Expect red volumes to grow in H217 v. H117 but it will be offset by volume pricing discounts.
- Ordering consistency and predictability - Called it "somewhat consistent", but still see differences Quarter to Quarter and Month to Month. Their ability to predict is getting better. The biggest variable to guidance remains when new capacity comes online.
- They are focusing on signing Samsung's extension in 2017 and not on a temporary or interim agreement.
Cooters
Quite a few congratulations and "Nice quarter"
rogo likes this.
Cooters is online now  
post #14081 of 14097 Old 08-03-2017, 05:44 PM
Member
 
nodixe's Avatar
 
Join Date: Nov 2009
Posts: 148
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Liked: 22
Quote:
Originally Posted by fafrd View Post
Found the attached graph.

It indicated that for 30,000 hour half-life (brown 20 mA/cm^2 curve), light output is reduced by ~10% after ~1000 hours).

And I've seen some reports that LG is claiming a 100,000 hour lifetime for their WOLED TVs (purple 10 mA/cm^2 curve) which would indicate that light output is reduced by about 5% after 1000 hours...).

The Wiki page on OLEDs indicates that the aging process involves loss of light generation efficiency only, so as an OLED ages through use, light output decreases while current/resistance remains roughly constant.

We've got several users who watch what many would consider to be excessive display of a TV/cable channel or two with static logo components reporting that they are experiencing signs of burn-in after ~500 hours of display of those static logos (25% - 40% of their viewing).

Those subpixels, especially for yellow/orange/red logos are getting 500 hours of repeated saturated use while surrounding subpixels are getting used as little as 1/16th that level (1 of 4 random colors at random intensity level).

These aging curves are convincing me that if you have a cluster of subpixels experiencing 500-1000 hours of high-saturation use while the overal panel subpixels of the same color are experiencing only 30-65 equivalent hours of use, that difference is likely to show up as subpixels whose light output is darker by ~5-10%...

Could this be behind the several reports of burn in by heavy TV/cable single-channel users we are seeing?
Yes. I was looking for the original article that talked about this and the compensation cycle that mitigates this (but it can only compensate a lil at a time to control aging). Also I read that the woled's used blue oled with a yellow phosphor(?)filter(?) to make white but I'm not sure....

Sent from my SM-G935V using Tapatalk
nodixe is offline  
post #14082 of 14097 Old 08-03-2017, 05:55 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Quote:
Originally Posted by nodixe View Post
Yes. I was looking for the original article that talked about this and the compensation cycle that mitigates this (but it can only compensate a lil at a time to control aging). Also I read that the woled's used blue oled with a yellow phosphor(?)filter(?) to make white but I'm not sure....

Sent from my SM-G935V using Tapatalk
As far as I understand, the compensation cycles are something completely different.

Threshhold shift can occur through use but the TV is able to sense threshold shift and con conpensate for it internally. So the result of threshold shift is a kibd of image retention that can be mitigated through a compensation cycle ('panel clean').

The permanent burn-in several members have reported appears to be related to aging of the OLED subpixel material through use - if use is not random and even, a portion of the screen displaying a bright static yellow/orange/red logo for a large % of the time will age faster than the other subpixels displaying random content.

This nonuniform aging cannot be detected by the TV and cannot be compensated for automatically (the only mitigation may be aging the other subpixels a similar amount through continued dispay of specific aging test patterns)...

White OLEDs (WOLEDs) use a blue layer and a yellow (which is red+green) layer to generate white light. The original composition was 2-layer but LG may now be using a 3-layer BYB composition...
NintendoManiac64 likes this.

Last edited by fafrd; 08-03-2017 at 05:58 PM.
fafrd is offline  
post #14083 of 14097 Old 08-04-2017, 11:14 AM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Sharp supposedly dipping their toe into OLED TV panel production: http://4k.com/news/sharp-to-possibly...-panels-20728/
ChaosCloud and JasonHa like this.
fafrd is offline  
post #14084 of 14097 Old 08-07-2017, 11:32 AM
AVS Forum Special Member
 
Rudy1's Avatar
 
Join Date: Oct 2000
Location: Ft. Lauderdale, FL
Posts: 5,031
Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
Quoted: 1317 Post(s)
Liked: 1887
APPLE FILES PATENT FOR OLED/QD HYBRID

https://hdguru.com/apple-files-paten...gy/#more-20961

There are two types of people in this world: People you want to drink with, and people who make you want to drink.
Rudy1 is online now  
post #14085 of 14097 Old 08-13-2017, 11:34 AM
Member
 
Join Date: May 2017
Posts: 162
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked: 53
Quote:
Originally Posted by Rudy1 View Post
APPLE FILES PATENT FOR OLED/QD HYBRID

https://hdguru.com/apple-files-paten...gy/#more-20961
If we think the current OLEDs at 77" prices are high, wait until Apple releases it's version. Be prepared to live in your car to afford it..but you can still have the TV outside in front of your car. It will be like drive in movies of the past.
Keithian is online now  
post #14086 of 14097 Old 08-13-2017, 12:10 PM
Oppo Beta Group
 
RichB's Avatar
 
Join Date: Nov 1999
Location: Massachusetts
Posts: 10,178
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1198 Post(s)
Liked: 785
Quote:
Originally Posted by Keithian View Post
If we think the current OLEDs at 77" prices are high, wait until Apple releases it's version. Be prepared to live in your car to afford it..but you can still have the TV outside in front of your car. It will be like drive in movies of the past.


It wont have any adjustments because Apple knows best


- Rich
JasonHa likes this.

Oppo UPD-205 | Sonica DAC | BDP-105D | HA-1 | PM-1 | Emotiva XMC-1 | ATI Signature AT6002 x 2 + AT6006 | Revel Salon2s, Voice2, Studio2s | Velodyne HGS-15 | LG 65C7 | Lumagen 2020
RichB is online now  
post #14087 of 14097 Old 08-13-2017, 01:38 PM
AVS Forum Special Member
 
wco81's Avatar
 
Join Date: May 2001
Posts: 6,379
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 1398 Post(s)
Liked: 531
They'd only be interested in using it for iPhones, their cash-cow.

Maybe they will use those displays in some iPad Pros.

Otherwise, it doesn't relate to TVs, which are not high margin enough for Apple to bother with.
wco81 is online now  
post #14088 of 14097 Old 08-13-2017, 05:09 PM
AVS Forum Addicted Member
 
rogo's Avatar
 
Join Date: Dec 1999
Location: Stop making curved screens
Posts: 31,830
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 1630 Post(s)
Liked: 1841
High-end TVs have Apple-like margins.

They don't, however, have Apple-like volumes. Not even Apple Watch-like volumes.
fafrd likes this.

There's a saying about "everything in moderation". If only it was applied to well, you know...
rogo is offline  
post #14089 of 14097 Old 08-15-2017, 05:54 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
There were some earlier posts to the effect that LG never said anything about a 'tick-tock' WOLED penel development cycle and we here on AVS just made it up.

Just ran into this so thought I would share: http://www.flatpanelshd.com/news.php...&id=1482983106

"Update 10.01.2017: LG.Display actually switched to a 3 stack structure in 2016, which was the "tick "- 2017 is the "tock" year where further improvements will be introduced, according to LG at CES 2017)."
fafrd is offline  
post #14090 of 14097 Old 08-15-2017, 06:07 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
This paper on top emission WOLED by LG was found by AVSer Morille Tremblay: https://www.researchgate.net/profile...1b39b1534d.pdf

It's from SID 2016 but not quite clear to me if it is simulation only or they actually built a top-emission WOLED panel.

There is also no mention of voltage drop in the thin trasmarent top-electrode layer and I thought some earlier posts indicated that that was the remaining problem to be solved before top-emission could be introduced...

But if nothing else, this paper confirms that LG has been working on top-emission WOLED since at least 2015...

Also contains about the clearest explanation for the reasons bottom-emitting WOLED suffers from off-axis color shift .
fafrd is offline  
post #14091 of 14097 Old Yesterday, 03:56 AM
AVS Forum Special Member
 
Wizziwig's Avatar
 
Join Date: Jul 2001
Location: SoCal, USA
Posts: 2,500
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1239 Post(s)
Liked: 896
Quote:
Originally Posted by fafrd View Post
Also contains about the clearest explanation for the reasons bottom-emitting WOLED suffers from off-axis color shift .
I have yet to see any OLED (TV or mobile) that doesn't suffer from easily visible color shift off axis. Even the Samsung 55" OLED had it. They all turn pink or green. Don't see any of that shift on my old CRT or Plasma.
Wizziwig is offline  
post #14092 of 14097 Old Yesterday, 07:10 AM
Senior Member
 
joys_R_us's Avatar
 
Join Date: Dec 2001
Location: Berlin - Germany
Posts: 347
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Liked: 71
Quote:
Originally Posted by fafrd View Post
There were some earlier posts to the effect that LG never said anything about a 'tick-tock' WOLED penel development cycle and we here on AVS just made it up.

Just ran into this so thought I would share: http://www.flatpanelshd.com/news.php...&id=1482983106

"Update 10.01.2017: LG.Display actually switched to a 3 stack structure in 2016, which was the "tick "- 2017 is the "tock" year where further improvements will be introduced, according to LG at CES 2017)."
No, again, no.


I didn't say it did not come from LG. I said it is just marketing talk as an excuse to explain the little quality/feature improvements of 2017 panels vs. 2016 panels.

Time will tell but I am sure that the various technical battlefields in OLED development cannot be planned to a cycle order or can be held up until the next "tick".
joys_R_us is online now  
post #14093 of 14097 Old Yesterday, 12:56 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
I've been fortunate to be able to read the contents of this paper: http://onlinelibrary.wiley.com/doi/1...11555/abstract

It explains that LG made a major change in WOLED architecture in 2016 in order to achieve UHD Premium OLED Certification.

The 2015 WOLED was a 3Stack 2Color (3S2C) of B-YG-B.

The new 3Stack 3Color (3S3C) they introduced in 2016 was B-YG-R+B.

The conclusion states that they addeed a Phosphorescent Red EML layer to enhance Red subpixel efficiency and color gamut of OLED TVs.

The fact that the ~10-15% reports we are seeing of burn-in on 2016 WOLED TVs from 20%+ CNN or MSNBC viewing with OLED Light >50 are all occuring on red subpixels may be no coincidence...
j.p.s likes this.
fafrd is offline  
post #14094 of 14097 Old Yesterday, 01:06 PM
AVS Forum Special Member
 
wco81's Avatar
 
Join Date: May 2001
Posts: 6,379
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 1398 Post(s)
Liked: 531
Does their warranty cover burn-in?
wco81 is online now  
post #14095 of 14097 Old Yesterday, 01:14 PM
AVS Forum Addicted Member
 
fafrd's Avatar
 
Join Date: Jun 2002
Posts: 10,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 2945
Quote:
Originally Posted by wco81 View Post
Does their warranty cover burn-in?
LGs warranty apparently does not cover burn-in and if you check out the Burn-in with Photos thread you will see that 10-15 members have had their warranty claims turned down by LG (so far - appears to be evolving situation in some cases).
fafrd is offline  
post #14096 of 14097 Old Today, 01:08 AM
AVS Forum Special Member
 
Join Date: Jan 2016
Posts: 5,331
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 3105 Post(s)
Liked: 2678
Beginning to smell like a case that is ripe for lawyers and litigation.
video_analysis is online now  
post #14097 of 14097 Old Today, 03:32 AM
AVS Forum Special Member
 
Wizziwig's Avatar
 
Join Date: Jul 2001
Location: SoCal, USA
Posts: 2,500
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1239 Post(s)
Liked: 896
Another reason we see burn in on red fields is that the native color temperature of the WOLED is very high (~8000K+). This is evident from the papers linked by fafrd. In order to bring it down to the industry standard 6500K, the red sub-pixels need to active/driven more than the blue or green subpixels when displaying the most common white static picture elements. If you then combine that with red static elements, the total usage of the red sub-pixels is much higher than the other colors. I guess if you really want to prolong WOLED lifetime, watch everything using cooler color temperatures.
j.p.s likes this.
Wizziwig is offline  
Sponsored Links
Advertisement
 
Reply OLED Technology and Flat Panels General

Tags
Lcd Hdtv , Led Hdtv , Lg , Oled Tv , oled wireless speakers , Plasma Hdtv , Samsung

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off