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Recommended Usage
4 EP4650/EP5550 User Manual
16 Slight pressure on the LCD will cause distortion of the image. Heavier pressure
will cause permanent damage. Displays should be mounted where viewers
cannot touch the screen or insert small objects in the openings that will create
hazards by contacting bare conductive parts.
17 The front polarizer is soft and subject to scratches from sharp objects. The
polarizer is a thin sheet of film laminated to the outside layer of glass on the LCD
screen. Take care when handling items near the screen.
Recommended Usage
In order to get the most out of your LCD, use the following recommended guidelines
to optimize the display.
Burn-In Versus Temporary Image Retention
Burn-in causes the screen to retain an image essentially forever, with little or no way
to correct the problem. Under normal use, an LCD will not experience burn-in, as
plasma displays do, nor will it retain images in any way.
Normal use of an LCD is defined as displaying continuously changing video patterns
or images. However, LCDs can experience temporary image retention when
recommended usage guidelines are not followed.
What is Temporary Image Retention?
Temporary image retention (TIR) can occur when a static image is displayed
continuously for extended periods of time (12 hours or longer). An electrical charge
differential may build up between the electrodes of the liquid crystal, which causes a
negative-color video image (color-inverted and brightness-inverted version of the
previous image) to be retained when a new image is displayed. This behavior is true
for any LCD device from any LCD manufacturer.
TIR is not covered under warranty. See standard warranty terms and conditions for
details. Here are some guidelines to help you avoid TIR:
• Use the LCD to show a screen saver, moving images or still pictures that change
regularly. When using high-contrast images, reposition the images frequently.
• Turn off the LCD when it is not in use. To use your source computer’s Power
Options Properties, set up your computer to turn off the display when not in
use.
Caution:
For optimal performance, we suggest turning off the backlight power on the
EP4650/EP5550 for six hours per day.