There are different characteristics that result in panel image retention depending on how the plasma display is used.
Situations and effective usage methods related to ghosting are provided below.
Image retention characteristics of a plasma display
The image retention phenomenon of a plasma panel occurs because of partial phosphor degradation arising from partial character and figure display.
For example, when the character image as shown in Fig. A at the right is continuously
displayed for a long period of time, the only part of the phosphor (Red, Green, Blue) that will
degrade will be the color of the applicable character display portion. Consequently, when a
white image is displayed on the entire screen as shown in Fig. a, the character marks
displayed up to that time will become a color difference visible to the eye.
Fig. AFig. a
The degree of image retention is proportional to the brightness of the characters and figures displayed as well as the display time.
•The tendency of the phosphor is to degrade more the brighter the characters and figures
are displayed. When images of figures with different levels of brightness, as shown in Fig.
B, are continuously displayed for a long period of time, it becomes easier to see image
marks at locations when the brighter figures are displayed to see.
Fig. B Fig. b
* The image retention images in this document are exaggerated for the purpose of explanation. The actual manner in which the image retention is seen differs
depending on the operation time and brightness.
Methods to Reduce the Occurrence of Image Retention
•Lower the Contrast and Brightness settings of the plasma display as much as possible.
•Set the plasma monitor to "Screen Wipe" or "Inverse" display.
The occurrence of image retention when displaying images of identical patterns, such as static images, for long periods of time can be reduced by displaying
a reversed color or completely white screen for about 1 ~ 2 hours after terminating the display.
(Settings can be made using Screen Wipe and Inverse of Function MENU shown on
30
)
•Using in combination with moving images
Since the degradation of the fluorescent material progresses comparatively uniformly for moving images, the occurrence of partial image
retention can be minimized .We recommend to use in combination with moving images such as a DVD.
* Please be careful since image retention will occur if display is left in a two screen display state for a long period of time.
* Television broadcasts include images displayed for long periods of time in which the left and right or top and bottom of the image are cut and broadcast
station name or time are displayed in the same portion of the screen. Image retention in these portions can be expected to occur, so please be aware.
NOTES
About screen defects
•High precision technology is used in the making of plasma panels but there may be dark spots (points that do not illuminate) and bright spots (points that are
too bright) in some cases. These do not indicate a malfunction.
About residual images
•In some cases, residual images may remain after the short-term display of still images and another image is displayed , but these will disappear and return to
normalcy. This is not a malfunction.
About the panel screen
•Plasma displays display images by means of electrical discharges inside the panel. Because of this, the temperature of the panel surface may rise in some
cases. Also, plasma displays are made of finely processed glass. A reinforced glass filter is installed over the panel surface but avoid strong impact because
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