A pixel is a single white dot surrounded by a black background, of the smallest size that the monitor could properly focus. This requires a number of individual color cells, in most cases around nine individual color cells make up a period (.). When you look at a screen image, it actually consists of thousands of tiny dots. If you look close you can spot them: Each of these dots is called a pixel . That is a contraction of the term Picture Elements. In an ordinary screen, each pixel consists of three colors: Red, green and blue. Thus, there are actually three "sub dots" in each pixel. But they are so small that they "melt" together as one dot: The individual pixel or dot then consists of three mini dots, also called trio dot . Some screens do not have round dots, but they work the same way. With the three basic colors, each of which can be assigned with varying intensity, you can create many different colors.
