Since the beginning of the pixel era with products of Atari ST, Amiga or IBM PS / 2 VGA, the normal resolution is based on two screen ratios of 16:10 (more precisely 8: 5). for 640 x 400 pixels or 4: 3 for 640 x 480 pixels.
After that, other resolutions like 800 x 600 SVGA, 1024 x 768 XGA, 1600 x 1200 UXGA and 2048 x 1536 QXGA have the same ratio. Only a slightly special 1280 x 1024 SXGA - 5: 4 aspect ratio.
These designs do not damage the display structure of regular TVs as well as computers so that users are still comfortable when viewing web pages, editing documents .
Odd screen rate disruptive to consumers Picture 1 When widescreen HDTVs emerged, at 16: 9, a new generation of screens came out with a resolution of 1920 x 1080, 1280 x 720, 1600 x 900. Meanwhile, there were very few support games. This rate makes monsters or machines become big. The 4: 3 standard TV signals stretch to fill the screen and make the viewer have to re-set the ratio in the device or choose the device according to a very "mysterious" parameter.
For example, if watching a DVD on a 32-inch widescreen, people will see more images than a 4: 3 32-inch TV because each side has an additional 1.85 inches. But due to the 16: 9 standard device, the person in the movie will be 2.4 inches lower. To keep things normal, users have to adjust and resize images on 32-inch 16: 9 TVs that will be the same as those on 26-inch TVs with a 4: 3 aspect ratio.
So, when you need a 16: 9 wide-screen TV to see a wider image and still want to be as tall as a 4: 3 TV of the same size, it is recommended to multiply the 4: 3 TV diagonal (eg 30 inches) with the number of 1.2238. The result (36.7 inches) is the diagonal size on a 16: 9 widescreen TV that needs to be purchased and edited.
Despite such trouble, strange types of screens still exist as a new creative idea. In Seoul (Korea), one can see that the LCD screen for the desktop is a real square with a resolution of 1024 x 1024. Stranger than that, there is a 26-inch bottom font display on the upper half, but only 15.6 inches in the lower part.