Originally Posted by DBLASS
All (almost all, maybe) phosphors age. This means that the brightness per drive voltage will decrease in the begining of the use of the phosphor. There is a quick drop of the brightness/voltage curve and then it settles out for the long run. Despite all the new technologies the plasma mfgs are using (lower drive levels, better phosphors, etc) this aging or phosphor settling is something to watch for.
There is nothing run with plasma sets, once one understands the physics, you can relax. Remember the CRT is as, if not more susceptable to burn-in than other technologies and we have been living with them for years.
Originally Posted by fogey
As far, as I know, phosphors of CRTs are actually much less susceptible to IR or burn-in, because cathod rays are much gentler to them than ultraviolet light, emitted from gas in every micro cell of the display in PDP.
The IR and BI issue regarding PDP is rather controversial in my mind. I personally have developed some controversial beliefs in this matter based on scientific data. I also try to not push these beliefs too hard on others as the masses can get angry
But, in the name of science, I'll just provide some counterpoints.
1 - PDP phosphors are pre-baked in the manufacturing plant and this baking effectively pre-ages the phosphor (decreases luminence) which is supposed to eliminate the initial steep aging period.
2 - Actual lilfetime plots on PDPs or their individual phosphors are hard to find (especially recent data), but there is data showing that the initial steep phosphor aging may be a thing of the past.http://www.displayconsultants.com/presentation/spie.swf
High Xenon content PDPs generate lower energy photons that do not degrade the phosphor very quickly and thus lead to much longer life expectancy.
3 - IR is temporary and thus logically suggests that phosphor aging is not the cause. If so how can it be temporary?
4 - IR is explained in science journals as being related to wall charge accumulation and MgO vapor deposition. Both are reversible.