the oled screen burn debate - everything you need to know

by:LCD Mall     2020-08-14
In the past few years, this is an article that I have considered writing multiple times, but in the end it is always avoided.
Mainly because I haven\'t been persuaded to have enough cold, hard evidence to prove that the consumer oled TV screen was burned --
In the case of continuous exposure to bright static image elements, the \"wear\" area of organic material on the OLED screen will be faster than the rest of the screen, leaving permanent ghost traces of static image elements --
This is indeed a common problem.
However, some recent developments have made me think that it is time to explore this controversial issue.
I think I am here to present all these recent developments as evidence of prosecution.
Before I discuss any of these, however, there is a little important \"butler\" to cover: the difference between image retention and screen burning.
Image retention is the temporary look of the ghostly residue of bold static image elements on the screen.
When you don\'t watch the same content that causes retention, or when an oled TV is recycled when you turn off the power, this situation disappears over time.
Permanent screen burning (
Or very long term)
Images that will never disappear (
Or it will take weeks or months to disappear).
In my opinion, there is a connection between image retention and screen burning, and the image elements that cause the image to be retained may end up causing the screen to burn.
You can even see that image retention is a warning that what you often look at can end up causing a burn on the screen, so extra care is required (
More will be introduced later).
However, the causes or effects of both are not the same.
Solved this problem, let\'s take a look at why I think OLED\'s potential sensitivity to screen burning is more noteworthy than before.
First, the owners of Sony\'s oled TV were upset earlier this year (
There are reports here)
Introduce a new image dimming algorithm through firmware, if the static image component-
Like game HUD
Looked on the screen for about a minute.
Sony confirmed it was a deliberate move.
Although the brand later adjusted the update to reduce distraction, the significance behind it is undoubtedly an attempt to minimize the risk of screen burns affecting OLED TVs.
This makes me think that Sony is either in its own test environment or in actual consumer reports, responding to the actual situation of the screen burn, either act according to LG Display\'s advice and be responsible for almost all TV manufacturers in the world-
OLED panel size.
Next, LG recently released a new firmware update for the latest generation of OLED TVs, increasing the degree and speed of dimming bright images, which also upset buyers of 2018 OLED TVs (As described here).
LG confirmed to me that this \"aims to reduce the discomfort of consumers in the event that temporary image retention may occur under certain viewing conditions \".
It is also worth noting here that LG has introduced a new feature for its 2018 OLED TVs that can reduce the brightness of static picture elements without affecting the rest of the picture.
All of these measures suggest that manufacturers of OLED TVs still see screen burning as a problem.
In fact, with this new reactionretention/anti-
Recently, oled TV has appeared for many years, and screen burning measures seem to be becoming more and more frequent. It is difficult not to think that a series of activities are related to the growing influence of high-dynamic range video (
It provides a wider range of brightness)
Therefore, it is necessary to make the oled TV run brighter.
Another recent development has improved screen burn\'s recent image, the latest test of this issue by Rtings, an online technology testing site.
This is actually the second time that rtings has tried to measure the extent to which the oled TV screen is burnt out, but I kinda ignored the first time because its method doesn\'t feel \"real world \".
However, the latest test seems more sensible --
And suggest that the latest oled TV will burn out after 4,000 or less
Use 5,000 hours.
This number has an inevitable qualification, based on the number of TV content you watch in the static image area, the brightness of the TV you run, and even the color of the static image elements (
OLED red seems to degrade faster than other shades).
Rtings OLED screens running at low brightness, or OLED screens that do not display content for any long period of time, with static image elements, running for more than 5,000 hours with no evidence of permanent burningin issues.
However, these qualifications are actually associated with screen burning avoidance suggestions provided by oled TV brands (
More information on this at the moment).
So what really appeals to you about Rtings research is how fast it burns.
In may appear if you do not follow the screen burning advice.
The last thing that prompted me to put this article together recently was that I actually experienced an extension of my image retention time (
Even after I power off the TV, the ghost that highlights the image element still exists)
On the 2018 LG oled778 oled TV.
Over the course of a few months, I used the OLED77C8 in many head to head tests, using many of the same high dynamic range movie sequences.
Especially the very bright crazy Max: 4k blue light on Fury Roadray.
Just before the set finally returned to LG, I noticed that there were many areas on the screen showing Ghost Shadows of 4k Blu-ray
Image of the title of Ray
These ghosts are still visible after some power-off/power-on recycling.
The good news is that I use the pixel refresh feature of the TV (
Main article below).
The bad news is that Sony\'s suggestion for its similar panel refresh feature states that \"the panel refresh feature may affect the panel.
As a reference . . . . . . Do not perform more than once a year as it may affect the service life of the panel.
So after this experience, I couldn\'t help but wonder a)
Before the image remains permanent burn, the TV must be exposed for a long time in the Mad Max image, B)
What damage I might do to the screen (
Perhaps a permanent aging of all organic materials? )
If I then have to run the pixel refresh feature repeatedly in less than a year.
After all, when retention becomes clear, I don\'t actually invest that much time on TV compared to someone who might use one as the main living room.
Although at the same time, contrary to LG\'s suggestion of use, the proportion of time I spend on the set is unusual, which of course is absolutely correct. Ah yes. Usage advice.
This is another key aspect of any discussion about OLED screen burning, and has an impact on the arguments of both parties \"How much should you worry about.
The instruction manual you get on each oled TV includes the following statement: First, there is an image retention problem with the oled TV, and secondly, what precautions should you take as the TV owner to avoid image retention.
For example, there is such content in the manual of Sony A1 oled TV: \"image retention oled TV is vulnerable to image retention (burn-in)
Due to the properties of the materials used.
If the image is repeated or displayed in the same position on the screen for a long time, an image retention may occur.
This is not a TV fault.
Avoid displaying images that may cause the image to be retained.
Sony\'s paragraph actually combines image retention with burning
In, the feeling that supports me, although they are not exactly the same, they are not completely unconnected, at least to the extent that most of the image content that causes the image to remain is likely to cause the screen to burn down.
Although I should stress that LG has raised objections in the second half of this article.
This Sony warning is followed by a very extensive list of material examples that may lead to image retention, as well as a longer list of steps to reduce risk.
Although reading for a long time, I think it is worthwhile to reproduce this information completely here, because this is the public domain information written by the oled TV brand, it can be said that it shows the extent to which OLED manufacturers are concerned about the risk of screen burning.
So here\'s: \"Here\'s an example of an image that might cause the image to be retained: the contents of black bars on the screen, on the bottom and/or on the left and right sides. (
For example, Letterboxed, 4: 3 screen, marked)
Static images such as photos.
There may be video games with static content in some parts of the screen. • On-
Screen menu, program guide, channel logo, etc.
Static content in the application. • On-
Such as screen markers for news and headlines.
To reduce the risk of image retention: Sony recommends that you turn the TV off normally by pressing the remote control or the power button on the TV.
Fill the screen by changing [Wide mode]
To eliminate black bars. Select [Wide mode]other than [Normal].
Closed OSD (
Screen Display)
Press/button to close the menu from the connected device.
For more information, see the instruction manual for connecting devices.
• Avoid displaying static images with bright colors (White included)
Clock or logo for any part of the screen.
Set picture settings according to environmental conditions.
It is recommended that families use and use standard pictures when viewing content that often displays the station logo, etc.
You can easily see why some people
Especially video game fans.
I\'m afraid OLED will burn out.
It should be said that another part of the panel refresh and pixel offset function is discussed in the Sony OLED manual, and the TV provides some functions to prevent burns in the display.
However, the burden of responsibility for users to minimize potential OLED screens is still high.
In addition, all of these user liability applies to oled TV warranty, excluding potential damage caused by screen burning, as this is considered the fault of TV users if this happens . . . . . . Defense cheese has prepared a case for defense. The first point is that although oled TV has become more and more popular in the past three years, technical forums around the world do not seem to be filled with complaints about permanent screen burns.
Perhaps it is clear that with regard to the intrusive procedures introduced occasionally by TV manufacturers to combat screen burns, it seems to be much more chatty than the actual screen burns that actually occur.
I think this may change because the popularity of OLED is a relatively new phenomenon, as it limits the time when screen burning has the opportunity to build itself.
But now it doesn\'t seem to affect too many people.
Although how many OLED TVs have been sold in the past two yearsthree years.
It is also important to emphasize that the use of a variety of TVs associated with the most typical home viewing patterns will naturally have an impact on permanent screen burns.
Most of the evidence so far suggests that what really needs to be worried is that only those who spend more time watching channels or playing games with static image elements than usual.
Of course, while the efforts of oled TV manufacturers to avoid screen burning by manipulating pictures may not always satisfy oled TV owners, they are in good faith, this shows that it is difficult for oled TV brands to be accused of ignoring the problem.
They seem to have been trying to find/improve ways to reduce the risk of oled TV becoming a permanent burn prey.
Hope is also always promising, and those pesky TV channels that use the bold logo that will cause images to remain and eventually burn will eventually start to be more considerate of oled TV owners in general by downplaying or removing them.
In fact, just a week ago, the European Broadcasting Union released new guidelines designed to help broadcasters make their logo more organic to show friendliness.
However, I seem to recall a similar guide introduced in the age of plasma TV.
However, we still face a variety of eye-catching channel logos today.
Perhaps the most important point for the debate\'s defense to consider is why so many discerning AV fans are so keen on oled TV.
The main point is that each pixel in the OLED screen has its own light, while the LCD TV has to share the external light throughout the pixel area.
This means that the brightest pixel of a lens can sit next to the darkest pixel on the OLED screen, whether it is the intensity of the bright pixel or the darkness of the dark pixel, there will be no compromise.
As a result, OLED screens can provide deeper black and unmatched local contrast, especially in scenes that contain dark and light-colored content.
OLED\'s self-luminous properties also mean that its pictures are viewed from a wider perspective than the LCD display.
These advantages make oled TV a favorite of many fans and TV critics.
Personally, I think OLED and LCD TVs have their own advantages and disadvantages, and they have specific advantages in different environments and different types of content.
However, there is no doubt that oled TV can and does provide such brilliant pictures that many serious AV fans may consider the risk of screen burning --
And the efforts needed to avoid this situation.
The price to pay is relatively small.
The rest of the defense cases came from LG.
LG is almost single.
I am responsible for the mainstream production of oled TV myself, so I sent it a series of questions about aging.
The full text of the highly praised reply of Korean brands is as follows: \"1.
General response to image retention and OLED technology, including lifetime: OLED is a self
Emission technology has brought many significant benefits to image quality and performance.
Like any self.
Oled TV may appear temporary image retention in some cases, but permanent image retention or burning
It is rare under normal viewing conditions.
Lg oled TV has been designed to meet the same standard life level as other TV categories.
In fact, the theme of oled TV lifetime and image retention is irrelevant because one does not cause the other.
The condition of image retention is affected by the viewing mode, not the age of the TV, so it is not accurate to connect the two.
LG continues to lead the market in large-screen OLED products, which are subject to strict quality control measures to ensure their durability, reliability and extremely high consumer satisfaction.
In addition to strict quality control measures, LG is continuing to develop technologies to prevent image retention such as pixel refresh.
However, it is important for consumers to be aware of the specific circumstances that may lead to image retention, and the owner\'s manual includes recommended measures to prevent such situations.
LG is committed to proactively informing customers that they can enjoy the best image quality and performance from lg oled TV. 2.
Comments on the recent Rtings screen burning survey: Rtings acknowledged that its 2017 oled TV tests were conducted using extreme conditions and did not represent typical oled TV viewing or usage habits at all.
Starting in 2018, Rtings launched a new evaluation standard, which is closer to the actual consumer usage model, including several test shows such as NBC, FIFA football, CNN, etc, NFL sports and Duty summoning video games that repeat 20 hours of testing per channel every day.
LG has noticed the new testing process for rtings, which is one step closer than the typical real testing process
Life observation mode.
LG is aware of concerns about post-images in stressful use and continues to work on developing technologies to prevent images from being retained in more diverse viewing conditions. 3.
Comment on the relationship between the increase in OLED brightness today and the risk of \"post image :(i)
Increase in brightness will affect the possibility of a long time
LG is improving its algorithm to reduce the correlation between brightness and image retention.
This includes reducing the risk of image retention while maintaining the desired optimal brightness.
For this reason, lg oled TV has built in many technologies, including :-
Image quality compensation algorithm, can detect the change of voltage of each sub-node
Pixels, sense the amount of degradation over time, and make electrical compensation. -
Time peak brightness control, after 2 minutes, the brightness of the static image will gradually decrease
A logo extraction algorithm for a fixed logo can be detected, such as a network logo on the screen, and the brightness of the logo can be reduced. -
Pixel Orbiter, which will move the entire image several pixels at a preset interval.
Screen Saver, which automatically starts if a static image is detected for a long time. (ii)
There are two ways to improve the brightness of OLED pixels: increase the power flow to OLED pixels (
Increase the brightness of the light source)
, Or increase the aperture ratio (
Increase the size of the \"window\" through the light source).
When the current is driven through an OLED material (equivalent to each sub-pixel), it produces light.
In this process, the brightness increases according to the electric flow applied per unit area-
This does increase the pressure on OLED pixels.
However, due to the improvement of OLED material technology, the current that OLED pixels can withstand has increased, which means there will be no compromise on the lifetime.
In addition, the recent improvement in aperture ratio enables OLED TVs to increase brightness without increasing the current through the light source (
So there is no compromise on panel life).
\"VerdictSo, how much evidence can we provide for both parties to the dispute?
First of all, I think oled TV is still vulnerable to permanent screen burning, which is no doubt.
This is not just a \"history\" issue that has been completely \"solved.
In fact, LG acknowledged in some comments
With the advent of HDR, it is at least possible that in will become more problematic as the emergence of HDR drives higher brightness.
However, in my opinion, in the past period of time
Oled TV brands are trying to find ways to reduce the occurrence of screen burns, and are committed to the willingness of oled TV fans to care about how they use TV, in the real consumer world, the occurrence of permanent screen Burns is rare now and in the future.
Although how many OLED TVs are on sale now.
However, the least you need to know is to make sure that screen burning does not have an impact on the process you are looking.
From the consumer\'s point of view, this means that end users may make some compromises on their viewing habits.
On the manufacturer side, this means deploying the counter
Screen burning picture measures that can affect the quality of the picture.
The measure consumers should keep in mind is to regularly add to OLED TVs with firmware updates after OLED TVs are launched and preliminary reviews are written.
Of course, firmware updates are also good in this screen burn
Over time, the relevant TV features can always be improved and improved.
Given the pedigree of the brand involved, I feel confident that there will indeed be steady, generally upward progress.
Perhaps the best way to summarize everything is this: While OLED TVs should definitely get their love for their image quality potential, for now at least, we must accept that the love of oled TV is accompanied by some trials and tribulations.
* In LG\'s own words, how Pixel Learning works: \"There are two opposite
Image retention system included in LG OLED TV
Long term pixel training and long term
Terminology for Pixel Learning. The short-
When the user turns the TV off, the term pixel refresh automatically starts to run, watching for more than four hours in total (
In one session or several sessions).
For example, if the user watched TV for two hours yesterday, he watched it for three hours today (
Five hours in total)
, The pixel refresh runs automatically for 10 minutes when the TV is turned off next time.
Users won\'t even realize it\'s running.
If the TV turns on before 10-
Minutes to complete, short-
The term Pixel Refresher will try to run the next time the TV is off. The long-
When the TV has a total viewing time of more than 2,000 hours, the term pixel refresh will work.
At this point, a notification appears when the user turns off the TV, informing them that the pixel refresh will start.
This operation runs for an hour when the TV is off.
When the process is almost complete, a white horizontal line is displayed on the screen.
If the user is in 1-
The hour operation is over and the TV will display a message that the pixel refresh has not been completed.
This notification is displayed each time the TV is turned off until the pixel trainer runs the full course.
In addition, users can manually activate pixel updates through the TV menu at any time.
However, there is no need for them to do this because the lg oled TV will run long automatically
Each time the viewing time reaches 2,000 hours, the term pixel refresh is performed. ”--
If you find this article useful, you may also like these: lg oled dimming issues: LG releases detailed comments in response to the odle65e8 oled TV: another infuriating firmware glitch Sony XBR hit the oled TV in the brain, what\'s the difference
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