EEVblog Electronics Community Forum
Products => Computers => Topic started by: tiago1986 on March 29, 2022, 07:54:02 pm
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The burn in effect fixes images and permanent blemishes on the screen on LED monitors how many hours of static image does this problem cause?
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It really depends on the LCD panel, how it's constructed, how it's driven etc etc
The LED part has little to do with the "burn in" - the LED refers to the backlight, strips of leds on the edges of the panel or lots of tiny leds making light that's then evenly spread across the surface of the panel and pushed out towards your eyes.
Basically CCFL (old style lcd monitors) or LED or QLED (led backlight with some extra prisms and optical filters to create wider spectrum and better color accuracy) ... all could have "burn in" because it's lcd panel related not backlight related.
OLED displays would be much more sensitive to that effect, because the organic material has a finite life and the higher the brightness, the faster the pixels wear out.
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my monitor is LG LED Widescreen 19M37AA
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As far as I can tell, that's an LCD monitor with LED backlight. Screen burn shouldn't be an issue with that as it is with OLED and CRT displays. Not in any reasonable time frame at least.
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I had an LCD TV connected to a computer that was on constantly with no screensaver, but was only actually used about half the time. The Windows desktop eventually did become "burned in". It was around 6-7 years though before it became noticeable.
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I've seen something similar, hence including the "not in any reasonable time frame" qualifier. Sometimes the image retention on LCD panels is temporary and will clear itself up after a while. Other times it may be permanent, I'm not entirely sure what mechanism(s) are in play.
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Will this problem occur with my LED monitor?
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reasonable time frame
Right. I wasn't disagreeing, just adding a point of reference.
In hindsight it was stupid of me to leave it on when not in use. I found a "burn in fixer" video on youtube and after a week or so of running it overnight there was noticeable reduction of the burn in.
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I'd second much of what is discussed here as has been my experience as well...
How the monitor will be used will most likely determine if it will experience burn-in. If it's going to be used to display a non-moving image (such as a restaurant menu near a cash register), that could potentially burn-in after a few years of being left on all day. If your computer screen is going to be left on all day while you use it, and perhaps you're worried the desktop wallpaper will get burned in, most likely not since 1) you'll probably be using it much of the day 2) it will probably go to sleep after a few minutes or hours of inactivity anyways when you walk away unless you force it to stay on longer.
When I have experienced burn-in, it was for a static public display monitor (similar to the restaurant example) where the same image is left on day and night, for months (and years) at a time.
I have also worked with offices that do not turn on screen savers or power save mode because that would slow down the workflow during the day. I really haven't seen any burn in with those scenarios. Instead, what I've been seeing a lot in the past five years is LED screens (both monitors and TVs) going "purple" because the plastic layer between the backlight and screen is chemically breaking down and instead of being transparent or white, is shifting the backlight to a purple color.
Also, I have heard if you leave an LCD screen that has burn in on bright white for a few days solid, it can clear out the burn-in to some degree, although I haven't tried this.
TL;DR: Regular use I wouldn't worry about it. Leaving it on a non-changing image for months 24/7, possible, but even then not guaranteed.
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I have also worked with offices that do not turn on screen savers or power save mode because that would slow down the workflow during the day. I really haven't seen any burn in with those scenarios. Instead, what I've been seeing a lot in the past five years is LED screens (both monitors and TVs) going "purple" because the plastic layer between the backlight and screen is chemically breaking down and instead of being transparent or white, is shifting the backlight to a purple color.
What is actually happening is the phosphor is flaking off the LEDs exposing the royal blue bare LED dies. The same problem is plaguing certain models of LED streetlights.