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
About the panel screen
rise in some cases. Also, plasma displays are made of finely processed glass. A reinforced glass filter is installed over the panel surface but
IMAGE RETENTION OF PLASMA DISPLAY
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
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
.
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
* 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.
Using in combination with moving images
* 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
Fig. A
Fig. a
Fig. B
Fig. b
The image retention phenomenon of a plasma panel occurs because of partial phosphor degradation arising from partial character and figure
time, it becomes easier to see image marks at locations when the brighter
figures are displayed to see.
Since the degradation of the fluorescent material progresses comparatively uniformly for moving images, the occurrence of partial image
retention can be minimized by usage in combination with moving images such as DVDs.
broadcast station name or time are displayed in the same portion of the screen. Image retention in these portions can
In some cases, residual images may remain after the short-term display of still images, but these will disappear and return to normalcy.
This is not a malfunction.
Plasma displays create images by means of electrical discharges inside the panel. Because of this, the temperature of the panel surface may
NOTES
avoid strong impact because there is still danger of glass breakage.
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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.
