Q:

Why are TV screens measured diagonally?

A:

Quick Answer

Television screens are measured diagonally because this is the way screens were originally measured. Early TVs had circular picture tubes that projected images onto the screen. The surface area of the screen could not be larger than the surface area of the tube, so measuring the tube gave the best measurement of the screen.

Know More
Why are TV screens measured diagonally?
Credit: Matthias Tunger Digital Vision Getty Images

Full Answer

The use of diagonal measurements to determine screen size was not considered to be misleading, since previous televisions all had a ratio of 4:3. The ratio meant that the height of a screen was three-fourths the size of the width. When widescreen televisions become popular, the ratio jumped to 16.9, and the stated screen size became far less accurate than the actual horizontal measurement. Due to lawsuits that arose from the discrepancy between the stated screen size and the actual size, manufacturers are legally obligated to specify the viewable screen dimensions. However, most screens are still identified and marketed using the diagonal measurement. Some manufacturers have started to add a "w" to the screen size to indicate a television is widescreen.

The diagonal measurement method is slightly different for CRT TVs, or cathode ray tube televisions, and LCD TVs. A CRT TV is measured diagonally from the top corner to the bottom corner, including the TV casing. However, LCDs are measured the same way, but only the actual screen is measured.


Is this answer helpful?

Similar Questions

  • Q:

    How do you measure a TV?

    A:

    Televisions are measured according to their screen size, diagonally across the screen. To measure a TV, take a tape measure and use the bottom left-hand corner as a starting point. Stretch the measuring tape upward across the screen, diagonally to the top right-hand corner. The length is the screen's measurement.

    Full Answer >
    Filed Under:
  • Q:

    What can be done about scratches on LCD screens?

    A:

    Light scratches on LCD screens can be fixed using various inexpensive items commonly found at home. If the scratch is heavy, a scratch removal kit may be a better option. One method to remove a light scratch is to create a mixture with equal parts baking soda and glass cleaner. Apply the mixture to the scratch in a light, circular motion, essentially buffing the scratch off the screen.

    Full Answer >
    Filed Under:
  • Q:

    What are the differences between TV and radio?

    A:

    There are numerous differences between television and radio, namely that television broadcasts transmit images and sound, whereas radio broadcasts only transmit sound. The success of radio catalyzed a race from investors to research and develop the more advanced broadcast system of television.

    Full Answer >
    Filed Under:
  • Q:

    Why does a TV shut off by itself?

    A:

    Power supply failures often cause televisions to shut off by themselves. The problems may be in the television's power system or from the source of power. Problems with cable boxes can make it look like the television is turning off on its own.

    Full Answer >
    Filed Under:

Explore