Displays that use the raster scan technique for assembling an electronic image on a screen by drawing a raster of horizontal lines. They are the most popular kind of graphics display. High-quality raster displays can not only show areas of solid color but can also display vectors (lines connecting endpoints) that have been appropriately converted (rasterized) to pixel patterns. This process is also called scan conversion and usually takes place in the image-creation system, which The generation of a picture on a raster display. In raster scan, the picture is assembled line by line, as, for example, when an electron beam draws a set pattern of horizontal lines on the surface of the surface of a phosphor-coated CRT screen.