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The size of a panel is the diagonal measure-
ment of the screen in inches. Interestingly,
that is consistent worldwide. Even though
the entire world outside the U.S. uses the
metric system, TV sizes are always measured
in inches.
Both the SMPTE (Society of Motion Picture
and Television Engineers) and THX have made
recommendations indicating that the
optimum viewing distance is achieved when
the screen occupies about a 30 to 36 degree
field of view in the horizontal plane. This
means that the critical dimension is not the
diagonal measurement, but the width of the
screen. To achieve this angle, your minimum
viewing distance should be about twice the
screen width and the maximum distance
about 5 times the screen width.
BUYING THE LARGEST SCREEN
you can afford or fit in your allotted space is not always the best
idea. The optimal screen size really depends on viewing distance. If you sit too close to a large
screen, even when viewing fully resolved 1080p high definition (HD) content, you will begin to see
distracting picture elements. If you sit too far from the screen, you will not see the fine detail that
good high definition is capable of rendering.
Instead of trying to sort all this out manually,
here is a link to a handy
VIEWING DISTANCE CALCULATOR
Courtesy of
MY HOME THEATER
The critical dimension is not
the diagonal measurement,
but the width of the screen
Your minimum viewing
distance should be about
twice the screen width and
the maximum distance about
5 times the screen width
As a final note related to the viewing angle, if
you plan to mount your new flat panel TV on a
wall, think carefully in advance as to where it
would fit best practically. Hanging the TV too
high (e.g. above the fireplace) might look cool
but it would likely prove uncomfortable when
watching programs for extended periods. It is
best to keep the TV at a horizontally equal
level to your eyes to limit straining your neck.
SIZE
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