Mitsubishi WS-A48 Owner's Manual page 51

Part II1: Setup
Warning:
Do not leave stationary, PIP/POP, or letterbox images on-screen
for extended periods of time. Mix the types of pictures shown.
Uneven picture tube aging is NOT covered by your warranty.
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 sta-
tionary pattern frequently may 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 given 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 (leav-
ing black or colored bars to fill the screen),
when used over extended periods of time or
when viewed repeatedly may 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 Iogos & pricing
displays: bright graphics that are
shown constantly or repeatedly in the
same location.
.,,='_ Video game patterns and scoreboards
Bright station Iogos: moving or
low-contrast graphics are less likely
to cause uneven aging of the picture
tubes.
Online (Internet) websites: or any other
stationary or repetitive computer style
images.
Closed Captioning