What's the resolution?

It is the precision of the screen image, which refers to the number of pixels that the display can display. Since the points, lines, and faces on the screen are all composed of pixels, the more pixels the display can display, the finer the picture will be, and the more information can be displayed in the same screen area, so resolution is a very important one. One of the performance indicators.The resolution is represented by the number of intersection points of all meridians and wefts
For example, the 640X480PPI resolution represents the horizontal direction 640, and the vertical direction 480 can also be expressed as 307200(640X480) pixels within one square inch.