How big is a screen?
Table of screen sizes in inches and dimensions in cm
|Diagonal in inches||Diagonal in cm||Width x Height (cm)|
|32″||81.3cm||70.8 x 39.8cm|
|39″||99.1cm||86.3 x 48.6cm|
|40″||40″||88.6 x 49.8cm|
|42″||106.7cm||93 x 52.3cm|
Inches/cm table according to screen formats and sizes
|Diagonal in inches||In cm||Format|
How a projection screen works ? The flat, clear surface of the canvas receives the images broadcast by the video equipment. The light emitted is received by the textile and returned to the viewer. The more qualitative and technologically advanced it is, the sharper and more contrasted the projection.
165 divided by 3 is 55, and so your screen should be about 55″ tall in this situation. Assuming a 16:9 aspect ratio for a 1080p/4K image, then the width would be 55*16/9 = 97.78″. You can then use the Pythagorean theorem (a2+b2=c2) to calculate the diagonal size of approximately 112″.
The aspect ratio: For HD content, it is 16:9; for cinema screens it is 2.35:1. The Pythagorean Theorem: Usually written A2+B2=C2, it may be more useful to think of it as W2+H2=S2, or width2+height2=screen size2.
The height and width of a screen depend not only on its diagonal expressed in inches, but also on its format. The 4/3 format dominated in Europe mainly for screens up to 55 cm diagonally, but is now largely supplanted by the 16:9 format.
The configuration of the room is also important because it will determine where to position its screen for the necessary distance. The basic rule for images broadcast in Full HD, 1080 HD or 16/9 format is to choose a distance three times greater than the height of the screen.