Geometrical Pixel On LED Giant Screens

In the previous post I explained why LED video walls use the Virtual Pixel: it's because it incredibly increase the image quality (+400%).

Now, how is that possible? Well, there are two different types of Virtual Pixel: the so called, "Geometrical or Squared" and the "Interpolated". Let's start from the first one.

Geometrical / Squared Virtual Pixel
This technology is based on a pretty simple geometrical concepts: if you have two identical shapes placed next to each other, by taking half of each shape, you can create other two identical shapes. Clear, isnt it? If not, the pictures below might help you.

Here we zoomed closer to the surface of a LED screen and now you can see 2 pixels, with 4 LEDs each (2 reds, 1 green and 1 blue), right? You see them? Ok.



Now, as I said, if you have two identical shapes placed next to each other, by taking half of each shape, you can create 2 more shapes. For example, if you have 2 identical pixels lying next to each other, by taking half of each pixel, you can create 2 more pixels... identical to the first two. Let's see it more clearly in the next image.

So, what happen when you combine the first 2 Real pixels, with the second 2 pixels that you created "Virtually"? You just doubled the number of pixels (from 2 to 4)! Now imagine to double the number of pixels you have in lenght, and - with the same technique -  double the number of pixels you have in height: well, you increased the number of pixels (and therefore the image quality) by 400%!

So this is how the "Geometrical / Squared Virtual Pixel". Pretty good, uh? Unfortunately Not. In the next post, I'll analyse the limitations and side-effects of this technology, in comparison with the "Interpolated Technology" we use on our digital billboard. So you decide which one is the best ... stay tuned!