All:
Do the commonly available monochrome OLED displays (128 x 96 etc) have a display lifespan. Seem to recall reading somewhere it is short, yet a google search of at least televisions with OLED state at least 8 years?
Well I have some cheap ones that are noticeably dim after a couple of years continuous use. They certainly suffer from burn for pixels that are on a lot of the time.
A regular TV shows moving pictures. The pixels might fade over time but this will be over the whole screen area.
In the days of CRT TV security monitors there would be noticeable screen burn because they displayed the same picture for years and years.
A friend showed me a monitor from the 1970s Channel Tunnel project that he worked on. It contained two picture burns side by side. Due to a historic collision with the mounting brackets. (Roy said that it was not his machine and he was not driving)
Most 128x64 OLEDs will suffer the same fate. i.e. noticeable screen burn from showing the same picture.
If you are designing a 128x64 product I suggest that you periodically change the picture e.g. display inverse.
Or sleep regularly. Wake when a human is near.
David.
Thanks for the replies. For a hobbyist project, so I suppose I could put in some sleep function, but in the end if a display lasts a couple years I am fine.