Bedienungsanleitung Hitachi P50TP01EA (Seite 9 von 71) (Englisch)

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ABOUT PLASMA DISPLAY PANEL

Image Retention of Plasma Display Panel

The plasma display panel has one of characteristics that can result in panel image retention depending on how the

plasma display is used. The following are the common reasons for and effective preventive measures against the

image retention.

Characteristics of Image Retention

Image retention is caused by partial degrading the phosphors due

to the partial display of character and ﬁ gure.

For example, when the characters as shown in Fig. A are displayed

continuously for a long period of time, only the phosphors (Red/Green/

Blue) displaying the characters are degraded. Consequently, when

displaying an all white image on the entire screen as shown in Fig. a,

the marks remaining by the characters will show colour differences;

therefore, note that it is not burnt remains of the phosphors.

The degree of image retention is proportional to the Brightness

and Display Time for the characters and/or ﬁ gures.

The brighter the characters and ﬁ gure, the more phosphor is

degraded. As shown in Fig. B, in case of displaying images that

have different brightness each for a long time, Fig. b shows that

the brighter the image, the more it tends to remain.

* The illustrations are images to explain image retention. The actual manners on the image retention vary depending

on such conditions as operation time and brightness.

Method to Reduce Image Retention

Use “Screen Wipe” or “Luminance Manager” functions on the display, which are available from Conﬁ guration

menu. (Refer to

After displaying certain images such as a still image for a long time, “Screen Wipe” can be used to reduce the

image retention by displaying a completely white screen for about 1~2 hours. In addition, “Luminance Manager”

function works when displaying images such as TV station logos or clock displays in the corners of the screen.

Use in combination with moving images.

Since the entire screen has relatively even degradation of the phosphor in moving images, it can reduce the partial

image retention. We recommend to use together with such moving images as DVD.

Please be careful that leaving the images in 2-picture mode for a long period of time can cause image retention.

Some television broadcasts contain images of which cut the left/right or top/bottom, and in which broadcast station

identity or a clock is displayed for a long time at the same position. Please be aware that it may cause the image

retention.

Common Characteristics of Plasma Display Panels

The following are the common characteristics of Plasma Display Panel due to structural reasons.

Please note that they are not malfunctions.

Residual image

When a still image or menu is displayed on the screen for a short time (about a minute) and then switches to another

image, it may leave an “after-image” on the screen.

The residual image will disappear on its own.

Surface on Panel

The plasma panel displays images by generating discharges internally. This could raise the temperature of the display surface.

In addition, do not allow any forceful impact to the surface of panel because plasma panel is ﬁ ne-processing glass

even though the panel strengthens by the front ﬁ lter made of tempered glass.

Defective Pixels on Panel

The plasma display panel is manufactured with high-precision technology. However, there might be some pixels that

do not light, are brighter than the others, or in different colours, etc.

[Fig. B] [Fig. b]

[Fig. A] [Fig. a]

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