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An expensive TV is a poor investment, and people spend FAR too much on them

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tooki:

--- Quote from: tom66 on February 06, 2022, 09:10:07 am ---A friend of mine had similar issues with image retention on his OLED.  He eventually started leaving it plugged in (normally it was powered off at night as he had one of those 'standby saver' devices that turns things off when his AVR is off.)

That apparently helps, because the Sony OLEDs are programmed to do a cycle a few hour after power off, which helps with image retention, once every couple of weeks.  You can't even really see it:  a very thin grey line marching up and down the panel for 15 minutes a few hours after the TV turns off.  No idea how that helps, but apparently it does.  Sounds similar to the "smoky OLED" story but a manually activated cycle.

--- End quote ---
Reminds me of the folks who remove AC power from their inkjet printers to save money, not realizing that that causes the printer to do a slow, very wasteful deep cleaning every time, since it loses its memory of when it was last used. (With that memory, it will skip the deep cleaning if it was used within some time window).

bw2341:

--- Quote from: BrianHG on February 06, 2022, 12:49:33 pm ---Warning, QD-OLED has just hit the market.

Unlike OLED, true pure colors (no stupid white pixels to boost OLED's weak brightness), 3 year no-burn in guarantee, brighter overall white level and also already available in desktop PC monitors.

Be prepared to pay the new adopter's tax, but it looks worth it.

--- End quote ---

From what I've read, Samsung is using inkjet printers to deposit the red and green quantum dot colour conversion material onto a blue OLED matrix. The high initial price must be due to the poor yields of a brand new process. Hopefully, they can get the hang of it and bring the price down.

It's too early to say how badly QD-OLED will burn in. It's still blue OLED at its core which would be the life limiting factor. The much higher luminous efficacy of the direct view blue and QD converted red and green should result in lower power levels and longer lifetime in direct comparison to LG's white OLED based displays. If Samsung cranks up the power to exceed the brightness of their own LCD based TV's, they'll use up a lot of the lifetime they've gained.

BeBuLamar:
Unless you own a bar or restaurant or dentist office and need TV for your clients the TV is never an investment. But I do think expensive TV is worth the money.

MK14:

--- Quote from: tom66 on February 06, 2022, 09:10:07 am ---A friend of mine had similar issues with image retention on his OLED.  He eventually started leaving it plugged in (normally it was powered off at night as he had one of those 'standby saver' devices that turns things off when his AVR is off.)

That apparently helps, because the Sony OLEDs are programmed to do a cycle a few hour after power off, which helps with image retention, once every couple of weeks.  You can't even really see it:  a very thin grey line marching up and down the panel for 15 minutes a few hours after the TV turns off.  No idea how that helps, but apparently it does.  Sounds similar to the "smoky OLED" story but a manually activated cycle.

--- End quote ---

That's exactly what I heard, when I did my recent OLED research, for this thread. (Make dependent), as or similar to what you said. After around 4 hours of TV viewing usage, it activates the need to recalibrate the pixels. It then waits until the TV has next been turned off into stand-by mode. It then waits a further 4 hours (presumably to let the TV cool down fully and/or ensure a TV user is unlikely to immediately turn it back on again). It then draws the horizontal and/or vertical line patterns, that seem to measure and correct the 'thin film transistors' voltage levels. My earlier posts in this thread, detail some of the sources.

It takes around 1 hour to complete that pixel calibration procedure. Then after 2,000 hours has been reached, it does the same thing, but in a much more time consuming way.

There are differing opinions and information sources, as to if the recalibration procedures (manually activating them), reduces the maximum service life of the OLED panel. The people who think it does shorten the panel life, could well be right, but I don't know for sure.

Bassman59:

--- Quote from: MK14 on February 04, 2022, 07:11:03 pm ---
--- Quote from: TimFox on February 04, 2022, 06:47:31 pm ---"IPS" flat-panel displays can also suffer from burned-in images when the image does not change.
-hp- explicitly denies warranty for such displays used with unchanging images, such as surveillance monitors.

--- End quote ---

Are you really talking about IPS, or might you have meant OLED ?

I've yet to see any image retention or image burn on any IPS or LCD (IPS is a form of LCD screen, as well) monitor or TV.

I've seen it on CRTs though.

--- End quote ---

If you traveled through airports back when they used CRTs for the departure/arrival status displays, you saw a lot of burned-in images.

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