AW: Basically, there are some effects that can be observed with thin-film transistor liquid crystal displays (TFT-LCDs) which manifest due to the underlying technology. What occurs with displays may or may not be visible to the eye, as it depends on the type of panel. With the different TFT-LCD display types and solutions, older and newer TFT-LCD design variants must be differentiated in terms of the impact and persistence of visible effects.

An earlier common term that could occur with older TFT LCD displays was “ghosting”. Also known as “burn-in effect”. Displays affected by ghosting were permanently damaged. The effect could occur after just a few hours of operation. Effective counter-strategies were screen savers and pixel shifting. The panel technology has advanced further since then.

For several years now, ghosting has no longer been an issue with “good TFT-LCD” displays. But even today, visible effects can occur, which do look similar to the “ghosting” issue known in the old times.

Can also not be completely avoided, since the same technology is still used today – liquid crystal cells controlled by transistors. The effect and/or its visibility also depend to a large extent on the graphic layout of the OSD menu(s).

In contrast to the past, currently produced IPS-based TFT-LCD displays no longer suffer from permanent burn-in effects. The “shadows” are reversible. The shadows occur in areas where pixels have not been addressed for a longer period of time (“still image”). In these areas, the liquid crystal cells become inert and create shadows that are clearly visible on gray backgrounds…..

On the OCA-bonded TFT-LCD panel of the Z-N1000 model, still image lasting for more than 30 minutes can also produce “shadow” areas. This is hardly disturbing for normal use and 100% reversible. One device OFF / ON cycle does fully reset the liquid crystal cells.