MITSUBISHI ELECTRIC WS-55711 - Manual (Page 70)

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The normal use of a TV should include a mixture of
TV picture types. The most frequently used picture
types should fill the screen with constantly moving
images rather than stationary images or patterns.
Displaying the same stationary patterns over
extended periods of time, or displaying the same
stationary pattern frequently can leave a subtle but
permanent ghost image. To avoid this, mix your
viewing pattern. Do not show the same stationary
image for more than 15% of your total TV viewing
in any one week. Display constantly moving and
changing images that fill the screen whenever
possible.
This projection TV uses picture tubes to project the
image to the screen. All picture tubes age with
use. As they age, their light output is gradually
reduced. Normal TV pictures fill the screen
with constantly changing images. Under these
conditions, picture tubes age at an even rate across
the entire screen. This maintains a TV picture that
is evenly bright over the whole screen. Stationary
images or images that only partially fill the screen
(leaving black or colored bars to fill the screen),
when used over extended periods of time or when
viewed repeatedly, can cause uneven aging of the
phosphors and leave subtle ghosts of the stationary
images in the picture.
Still or stationary images may be received from
broadcasters, cable channels, satellite channels,
DVD discs, video tapes, laser discs, on-line
services, web/internet searching devices, video
games, and digital TV tuner/converter boxes.
Examples of these types of images can be, but are
not limited to the following:
Letterbox top/bottom black bars: shown at
the top and bottom of the TV screen when you
watch a widescreen (16:9) movie on a standard
(4:3) TV.
Side bar images: solid bars shown on each
side of an image when watching a standard (4:3)
program on a widescreen (16:9) TV.
Stock-market report bars: ticker running at the
bottom of the TV screen.
Shopping channel logos & pricing displays: bright
graphics that are shown constantly or repeatedly in the
same location.
Video game patterns and scoreboards
Bright station logos: moving or low-contrast graphics
are less likely to cause uneven aging of the picture tubes.
On-line (Internet) web sites: or any other stationary
or repetitive computer style images.
Closed Caption Backgrounds: When set to black
or bright color, if Close Caption will be used frequently,
Mitsubishi suggests the use of the gray background.
WARNING:
When using the VGA Input, do not leave stationary
or letterbox images on-screen for extended periods of time. Mix
types of pictures shown. Uneven picture tube aging is NOT covered
by your warranty.
IMPORTANT NOTES