Meet Display Knowledge in One Page!
First, the smallest unit that makes up an image: the pixel!
The R, G, B sub pixels that make up a pixel, resolution that numerically expresses the number of pixels,
PPI (Pixels Per Inch) which indicates the number of pixels in one inch of the display,
and PPD (Pixels Per Degree) which represents the number of pixels within one degree of the field of view in VR devices!

Let's explore the basic elements that make up a display screen.