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2. Display aspect ratio - Wikipedia

   en.wikipedia.org/wiki/Display_aspect_ratio

   The display aspect ratio (DAR) is the aspect ratio of a display device and so the proportional relationship between the physical width and the height of the display. It is expressed as two numbers separated by a colon (x: y), where x corresponds to the width and y to the height. Common aspect ratios for displays, past and present, include 5:4 ...

3. Aspect ratio (image) - Wikipedia

   en.wikipedia.org/wiki/Aspect_ratio_(image)

   The aspect ratio of an image is the ratio of its width to its height. It is expressed as two numbers separated by a colon, width:height. Common aspect ratios are 1.85:1 and 2.40:1 in cinematography, 4:3 and 16:9 in television, and 3:2 in still photography.

4. Display size - Wikipedia

   en.wikipedia.org/wiki/Display_size

   Display size. On 2D displays, such as computer monitors and TVs, display size or viewable image size (VIS) refers to the physical size of the area where pictures and videos are displayed. The size of a screen is usually described by the length of its diagonal, which is the distance between opposite corners, typically measured in inches.

5. List of common display resolutions - Wikipedia

   en.wikipedia.org/wiki/List_of_common_display...

   16:9. 8,294,400. 7680 × 4320. 8K UHDTV. 4320p. 33,177,600. Many of these resolutions are also used for video files that are not broadcast. These may also use other aspect ratios by cropping otherwise black bars at the top and bottom which result from cinema aspect ratios greater than 16∶9, such as 1.85 or 2.35 through 2.40 (dubbed ...

6. High-definition television - Wikipedia

   en.wikipedia.org/wiki/High-definition_television

   Frame size in pixels is defined as number of horizontal pixels × number of vertical pixels, for example 1280 × 720 or 1920 × 1080. Often the number of horizontal pixels is implied from context and is omitted, as in the case of 720p and 1080p .

7. Optimum HDTV viewing distance - Wikipedia

   en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance

   0.8 H. This table can be used in a number of ways : Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to ...