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Some displays, especially phosphor-based displays such as CRT projectors and Plasma (flat panel)
displays, can be 'burned' by still-images or otherwise not using the full display or raster. Examples of
this include ATM's, where the bank logo is permanently burned into the display. This is also the reason
why most projector manufacturers strongly recommend against the use of video games with projection
televisions, as many video games have still images in them.
Some types of projectors are not susceptible to burns, like DLP™ projectors. Since a DLP™ projector
uses tiny mirrors to create the image, burning the image is not a concern as the reflectivity of the
mirrors does not decay like the phosphor in a CRT or Plasma.
Besides still images, using a 4:3 image on a widescreen display could cause a '4:3 burn' (see below):
The example above shows what would happen on a widescreen display if a small 4:3 image were used
more often than widescreen images. This happens most frequently with CRT projectors or RPTV's, or
Plasma displays.
To minimize this problem, the PFP-7/PFP-11 can provide SIDE BARS, which will put grey bars up on
either side of a small 4:3 image (see 'side bar area' in the drawing above). This illuminates the other-
wise unused portion of the display, minimizing a potential 4:3 burn.
SIDE BAR LEVEL is the amount of illumination in the side bars. The goal is not to make them so bright
that they are much brighter than the 4:3 image itself (which could cause a reverse 4:3 burn), but not too
dim where they cannot be effective. While there is not a recommended level, Runco recommends keep-
ing the side bar level at a moderate level, approximately the same as the average light used on the 4:3
portion of the image.
NOTE: SIDE BAR LEVEL is only active on 16:9 screens. For 4:3 screens, side bar level is not active.
IMPOR
TANT:
Runco is not responsible for image burns on any display. Please exercise
caution when using a 4:3 image on a 16:9 screen with Plasmas and CRT-based televisions.
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Side
Bar
Area
Side
Bar
Area
‘4:3 burn’
Widescreen display
Side Bar Level