The 4:3 aspect ratio was common in older television cathode ray tube (CRT) displays, which were not easily adaptable to a wider aspect ratio. On CRTs there was often a difference between the aspect ratio of the computer resolution and the aspect ratio of the display causing non-square pixels (e.g. The 16:10 aspect ratio had its largest use in the 1995–2010 period, and the 16:9 aspect ratio tends to reflect post-2010 mass market computer monitor, laptop, and entertainment products displays. The 4:3 aspect ratio generally reflects older products, especially the era of the cathode ray tube (CRT).
The favored aspect ratio of mass market display industry products has changed gradually from 4:3, then to 16:10, then to 16:9, and is now changing to 18:9 for phones. Overview by vertical resolution and aspect ratio Display width (px) 1 Overview by vertical resolution and aspect ratio.
