PIXEL-   Pixel is the tiny light emitting element in a display. Each individual pixel has three primary colour those are RED,GREEN AND YELLOW ( in short known as RGB colour). These three colour composition in different ratio controlled by a complex electronic component produces different required colour. Combination of such many pixels creates an image in display.

PPI- PPI is the quantity of pixels in one squire Inch area of a display. It is one of the determining factor of smoother vision of display. So the display quality depends on the number of PPI. Higher the PPI number higher will be the density hence smoother will be the image or video.