“DISPLAY RESOLUTION” VS “PIXELS PER INCH”


Very often we come across the word “Resolution” for a video quality. So, let’s talk something about that. Resolution is the number of Pixels contained, expressed in terms of the number of pixels on the horizontal axis and the number on the vertical axis. The sharpness of the image on a display depends on the resolution and the size of the display.

The image below shows the pixel count for various video qualities.

resolutions-ultra-hd-4k-1080p-720p-dvd

So now, what’s PPI (Pixels Per Inch)? Well… There is some difference. When we look at the a small display with good resolution, that should be clear and sharp near the screen, but when the same image resolution is projected on a larger screen, we will not be able to see a clear image. The number of pixels i.e, the display resolution cannot explain this, there comes a new parameter called PPIĀ  (Pixels Per Inch).

How to measure PPI?

PPI or Pixel Density is the number of pixels on the diagonal of 1 inch square of a display.

This clearly explains that, higher the size of the display, lower is the Pixel density (PPI). Also it doesn’t make any sense having insanely high Pixel density on a bigger display or on a smaller display either, because we cannot go that close to see that huge number of pixels. But yes the professional people having display’s with higher PPI, that kinda make sense, but an average consumer have to sacrifice some features like Power efficiency.

So. what do you think?