Table for selecting the screen diagonal and resolution

When you have a question, how to choose a screen diagonal, or in what resolution to download a movie, I suggest using the Golovin table to select a screen diagonal (pdf, 85 Kb). I came up with the name myself, I hope Golovin would not mind.



With the advent of the first 4k TVs (3840 × 2160), I wanted to update the graph to determine the optimal distance to the screen. But since the recommended distances are indicated there, this would again result in a subjective discussion of the possibilities of each person’s vision. The new table, theoretically, should help everyone to make a choice, regardless of visual acuity.
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Instruction

• Print on A4 sheet the table without scaling.
• Hang at the screen level (or wherever you plan to install it). The table should be well lit (ideally illuminated with a lamp that gives a flood of scattered light directed at the table).
• Sit down to where you are watching TV . See how you usually watch TV (for example, with glasses or lenses).
• Determine the line that you see without errors.
• If you want to choose the diagonal of the future TV to watch the video, then select the value in the corresponding column on the left. For example, you see 7 lines from the top, so to see all the benefits of 1080p video, you need a television with a diagonal of at least 48 inches, or at least 32 inches for 720p.
• If you want to select the video resolution for your TV, then look in the column on the right, which corresponds to the diagonal of your TV. For example, you have a screen with a diagonal of 48 inches, if you see 5 lines from the top, but you do not see the sixth line, then you don’t make sense to download videos of higher quality than 720p. If you see line 6, but you don’t see 7, then you have a reason to download 1080p, but you will not see all the advantages.

Theory

This table is part of the Golovin-Sivtsev table, which is used to determine the visual acuity of a person. The symbol C (abroad, this symbol is called Landolt C) has a stroke thickness equal to 1/5 of the diameter, and the oval gap of the same size. In this table, the size of the stroke is equal to the pixel size at the given diagonal and screen resolution.

In the standard table, 10 lines correspond to normal vision when a person sees a 7mm symbol from a distance of 5 meters (this is a 1080p image on a 120 "screen).