Mitsubishi WS-55517 Manuel D’Utilisation

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 subtle but permanent ghost 
images.  To avoid this, mix your viewing patterns. 
Reducing the initial contrast level can help slow the 
aging process.  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 (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 from 
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.

  News and stock-market report bars: 

ticker running at the bottom of the TV screen.

bright graphics that are shown constantly or repeatedly 
in the same location.

  Video game patterns and scoreboards

moving or low-contrast graphics are less likely to cause 
uneven aging of the picture tubes.

or any other stationary or repetitive computer style 
images, including digital photos or computer  
applications/programs.

Mitsubishi recommends using a gray background 
rather than black or a bright color if you frequently use 
closed captioning.