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

The image retention phenomenon of a plasma panel occurs due to 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 colour 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 colour difference visible to the eye, but the phosphor will never burn.	[Fig. A]	[Fig. a]
	[Fig. A]	[Fig. 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 for image marks at locations when the brighter figures are displayed to be noticeable.

[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.

A function is provided in the display that controls the brightness of the screen to reduce degradation of the panel. Using this function makes it possible to reduce image retention.

(Refer to Panel Life (Extend 1.or Extend 2 shown on 19 )

• Set the plasma monitor to an “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 colour 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 19 )

• Using in combination with moving images

Since the degradation of the fluorescent material progresses comparatively uniform for moving images, the occurrence of partial image retention can be controlled. 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 for a long period of time at the same portion of the screen. Image retention in these portions can be expected to occur, so please be aware.

ENGLISH

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 there is still danger of glass breakage.

42PD5000, 42PMA500, 32PD5000 specifications

The Hitachi 42PD5000 is a notable plasma television model that garnered attention during its release in the mid-2000s. Known for its impressive display technology and sleek design, this model marked a significant point in the evolution of home entertainment systems, making it a popular choice among enthusiasts.

One of the standout features of the Hitachi 42PD5000 is its 42-inch screen, which offers expansive viewing space that enhances the home cinema experience. With a resolution of 1024 x 768 pixels, it provides clear and vibrant image quality, sharp enough to display intricate details in films and television shows. The plasma panel technology delivers deeper blacks, vibrant colors, and superior contrast ratios compared to traditional LCD televisions available at the time, making it an attractive option for media consumption.

Another significant technology employed in the Hitachi 42PD5000 is the use of progressive scan capabilities. This technology allows for smoother images during fast-motion scenes, which is particularly beneficial for sports enthusiasts and action movie fans. The responsiveness and fluidity in action sequences elevate viewing experiences, making it a desirable feature for many users.

In terms of connectivity, the Hitachi 42PD5000 is equipped with various input options, including HDMI ports, component video inputs, and standard AV inputs. This connectivity allows users to connect a multitude of devices, from DVD players to gaming consoles and other high-definition sources. The inclusion of built-in speakers offers decent audio quality, complementing the visual experience without the immediate need for external audio systems.

Design-wise, the Hitachi 42PD5000 strikes a balance between aesthetic appeal and functionality. Its sleek frame and minimalist design make it suitable for various interior styles, enhancing the overall decor of a room. Moreover, the relatively lightweight nature of plasma technology allows for easier installation and wall-mounting options.

In conclusion, the Hitachi 42PD5000 remains a memorable model in the history of plasma televisions due to its commendable features, including its vibrant display, progressive scan technology, and versatile connectivity options. Although newer technologies have emerged, the 42PD5000 still holds a place in the evolution of home entertainment systems, offering a glimpse into the transitional period of television technology. Its combination of image quality, design, and performance makes it a noteworthy choice for those looking back at earlier advancements in the realm of television.