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So OLED has problems with burn in, but can this be reduced if you enable BFI (black frame insertion)?

deama wrote: ↑

28 Jun 2020, 07:22

So OLED has problems with burn in, but can this be reduced if you enable BFI (black frame insertion)?

Not that I know of. I guess there's a slight possibility it can be slowed with continuous usage of BFI, but this hasn't been objectively tested.

jorimt wrote: ↑

30 Jun 2020, 12:54

deama wrote: ↑

28 Jun 2020, 07:22

So OLED has problems with burn in, but can this be reduced if you enable BFI (black frame insertion)?

Not that I know of. I guess there's a slight possibility it can be slowed with continuous usage of BFI, but this hasn't been objectively tested.

I asked this question on another forum and the guy said yes because lower brightness = will take longer to burn in, but donno if this has any merit to it though.

deama wrote: ↑

30 Jun 2020, 13:35

I asked this question on another forum and the guy said yes because lower brightness = will take longer to burn in, but donno if this has any merit to it though.

I don't believe BFI actually lower peak brightness though, but just obscures it. So if you have the OLED at 100% brightness, it's still max brightness, but the black frame inserted between makes it so instead of a sustained 100% brightness level, it's brief pulses of full brightness + brief pulses of black frames alternating continuously.

So with that in mind, I don't think it would help with burn-in reduction as much as a continuous lower non-BFI brightness setting would.

jorimt wrote: ↑

30 Jun 2020, 14:59

deama wrote: ↑

30 Jun 2020, 13:35

I asked this question on another forum and the guy said yes because lower brightness = will take longer to burn in, but donno if this has any merit to it though.

I don't believe BFI actually lower peak brightness though, but just obscures it. So if you have the OLED at 100% brightness, it's still max brightness, but the black frame inserted between makes it so instead of a sustained 100% brightness level, it's brief pulses of full brightness + brief pulses of black frames alternating continuously.

So with that in mind, I don't think it would help with burn-in reduction as much as a continuous lower non-BFI brightness setting would.

Yes but wouldn't the brief black pulses cancel out (not fully) the bright pulses? Would that work?
Like at 240hz, 120 of those would be 100% bright images, whereas the other 120 would be pure black, giving you an effective 50% brightness (let's say for example), so how comparable would that be if you had it at 120hz without BFI, but at 50% brightness?

jorimt wrote: ↑

30 Jun 2020, 14:59

I don't believe BFI actually lower peak brightness though, but just obscures it. So if you have the OLED at 100% brightness, it's still max brightness, but the black frame inserted between makes it so instead of a sustained 100% brightness level, it's brief pulses of full brightness + brief pulses of black frames alternating continuously.

So with that in mind, I don't think it would help with burn-in reduction as much as a continuous lower non-BFI brightness setting would.

It does greatly reduce OLED wear and tear.

Scientsts tested pulsed LED and OLED operation and found that it does prolong average life, though not nearly as much as average lower brightness.

Burn in definitely will be greatly reduced in BFI mode, as long as the pulses aren't brighter to compensate for dimness.

Chief Blur Buster wrote: ↑

30 Jun 2020, 15:48

jorimt wrote: ↑

30 Jun 2020, 14:59

I don't believe BFI actually lower peak brightness though, but just obscures it. So if you have the OLED at 100% brightness, it's still max brightness, but the black frame inserted between makes it so instead of a sustained 100% brightness level, it's brief pulses of full brightness + brief pulses of black frames alternating continuously.

So with that in mind, I don't think it would help with burn-in reduction as much as a continuous lower non-BFI brightness setting would.

It does greatly reduce OLED wear and tear.

Scientsts tested pulsed LED and OLED operation and found that it does prolong average life, though not nearly as much as average lower brightness.

Burn in definitely will be greatly reduced in BFI mode, as long as the pulses aren't brighter to compensate for dimness.

So then would it basically make no difference to use bfi at 100% brightness vs non-bfi but at 50% brightness?

Chief Blur Buster wrote: ↑

30 Jun 2020, 15:48

jorimt wrote: ↑

30 Jun 2020, 14:59

I don't believe BFI actually lower peak brightness though, but just obscures it. So if you have the OLED at 100% brightness, it's still max brightness, but the black frame inserted between makes it so instead of a sustained 100% brightness level, it's brief pulses of full brightness + brief pulses of black frames alternating continuously.

So with that in mind, I don't think it would help with burn-in reduction as much as a continuous lower non-BFI brightness setting would.

It does greatly reduce OLED wear and tear.

Scientsts tested pulsed LED and OLED operation and found that it does prolong average life, though not nearly as much as average lower brightness.

Burn in definitely will be greatly reduced in BFI mode, as long as the pulses aren't brighter to compensate for dimness.

Ah, good to know. I hadn't seen any material on the subject, so I assumed none had been made. Happen to have link to that study? I'd be interested to read it.

I calibrate non-BFI to 100 nits, and don't use my OLEDs as desktops, so I haven't had any issues with noticeable long-term IR or burn-in.

I think for real-world use cases, so long as you don't use it for one game with prominent HUDs 24/7 and/or as a desktop with constant static windows at 100% brightness, the worries over OLED burn-in are overwrought. I've actually had less luck with plasma in that respect.

jorimt wrote: ↑

30 Jun 2020, 16:42

I calibrate non-BFI to 100 nits, and don't use my OLEDs as desktops, so I haven't had any issues with noticeable long-term IR or burn-in.

I think for real-world use cases, so long as you don't use it for one game with prominent HUDs 24/7 and/or as a desktop with constant static windows at 100% brightness, the worries over OLED burn-in are overwrought. I've actually had less luck with plasma in that respect.

I actually would like to use the LG CX as my desktop monitor and am hoping it'll go to around 3 years before noticeable burn in happens, though I won't really know if I can drive it that far till I try.
So was thinking of waiting till black friday and hope for a £400-500 reduction.

deama wrote: ↑

30 Jun 2020, 17:03

I actually would like to use the LG CX as my desktop monitor and am hoping it'll go to around 3 years before noticeable burn in happens

OLED "burn-in" is primarily due to uneven aging of the panel, so if you mix it up enough, you should be fine. The primary issue in rtings burn-in tests, for instance (which were extreme and not typical of normal usage) were due to colorful static logos (such as CNN) and the like.

I think for 2018, 2019, and 2020 panels, LG has increased the size of the red subpixel to make it more resilient to this type of uneven wear, as well as added more aggressive preventative measures, such as logo dimming.