What is pqi and ppi?

what is PPI? Like · Reply · Mark as spam · 30w. The picture quality index (or PQI for short) is a rating system that allows us to differentiate between Samsung's 2015 and 2016 superb range of TVs. Interpolation technology, Picture Performance Index, Picture Quality Index. Screen Sizes: 43”; Screen Type: 4K Ultra HD/QLED; Refresh Rate: PQI 2400. I have seen stuff about needing a minimum of 60Hz refresh rate for 60fps and so on but in Europe other TV brands refresh rate seem to go up in 50s (Hz) which I' ve. I read that even if lcd has f.