[aciid]

Hallo zusammen,

seit geraumer Zeit fällt mir auf, das auf meinem iMac 2014 aufgerufene Webseiten oder Programme auf einem leeren Schreibtisch oder im Anmeldebildschirm durchschimmern. Ich fahre z.B. den Mac hoch und im Anmeldeschirm schimmert z.B. eine Webseite im Firefox durch, die ich mal aufgerufen hatte. Da ich den Mac jetzt einmal neu wiederhergestellt habe ohne Backup einspielen, vermute ich etwas mit der Hardware ist. Kennt jemand das Problem und weiß was es sein könnte ?

Das Bild zeigt den Anmeldebildschirm und man sieht deutlich das Durchschimmern.

[N0KIA]

Bei mir auch...
iMAC4k ca. 11/2015.

Nicht so toll.

[aciid]

Bei mir ist es der iMac 5K 27" ultimo 2014

[yugi]

What is Image Persistence?
Like the burn-in on CRTs, image persistence on LCD monitors is caused by the continuous display of static graphics on the screen for extended periods of time. What this does is cause the LCD crystals to have a memory for their location in order to generate the colors of that graphic. When a different color is then displayed in that location, the color will be off from what it should be and instead have a faint image of what was previously displayed.

The persistence is the result of the how the crystals in the display work. Essentially, the crystals move from a position that allows all light to go through to another that allows none through. It's almost like a shutter on a window. When the screen displays an image for an extremely long time, the crystals can want to switch in a certain position, similar to a window shutter.

It may shift a bit to alter the color but not completely resulting in it moving to the position it is really being asked to.

This problem is most common for elements of the display that do not change. So items that are likely to generate a persistent image are the taskbar, desktop icons, and even background images. All of these tend to be static in their location and will be displayed on the screen for an extended period of time. Once other graphics are loaded over these locations, it may be possible to see a faint outline or image of the previous graphic.

Is It Permanent?
In most cases, no. The crystals do have a natural state and can shift depending on the amount of current used to generate the desired color. As long as these colors do shift periodically, the crystals at that pixel should fluctuate enough such that the image will not be permanently imprinted into the crystals. Having said that, it is possible that the crystals could get a permanent memory if the screen image does not change at all and the screen is left on all the time. It is very unlikely for a consumer to have this happen as it is more likely to happen in a fixed display such as those seen as display boards for businesses that do not change.

But what if the monitor is already displaying some image persistence problems? Here are a few steps that can be used to try and correct it:

Turn off the monitor for extended periods of time. It can be as little as several hours or it could be as long as several days.
Use a screen saver with a rotating image and run it for an extended period of time. (This is done by setting a rotating screen saver and disabling the monitor sleep setting.) The rotating color palette should help remove the persistent image but it could take a while to remove it.
Run the screen with a single solid color or bright white for an extended period of time. This will cause all of the crystals to be reset at a single color setting and should erase any previous image persistence.


https://www.lifewire.com/lcd-image-persistence-833037

[LukeLR]

Bei mir ist es auch, ein iMac 27“ 2012. Die Displays von den iMacs sind halt gar nicht mal unbedingt so geil. Ist aber normal und du kannst auch nichts dagegen tun...

[aciid]

Ich habe ihn jetzt mal komplett über Nacht mit einem weißen Hintergrund und voller Helligkeit und eine Nacht mit einem rotierenden Bildschirmschoner laufen lassen und es ist tatsächlich weniger geworden. Ist jetzt nur noch ganz schwach zu sehen.

[yugi]

@aciid gern geschehen

[aciid]

Danke :-)