Pioneer PDP 503CMX, Техническое руководство

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Regarding the problem of images becoming burnt onto the screen
5.8 Regarding the problem of images becoming burnt onto the screen
If the same image is shown on the screen for a prolonged period of time (i.e. a still picture or a closed-captioning etc.),
then this image may become permanently burnt onto the screen. This problem can be managed by changing image
composition, source rotation or other methods. Additionally, this unit also offers the following methods of reducing the
likelihood of images from becoming burnt onto the screen.
1
Setting the Mask control
Every time you turn the unit on, the built-in microcomputer moves the picture border randomly.
NOTE: This only applies when there is a side mask, for example with the 4:3 screen size.
2
Automatic brightness adjustment (detection of still pictures)
This function detects pictures that have little or no movement and automatically adjusts the brightness.
3
Side mask adjustment
Side mask adjustment may be used to adjust the brightness of the area around the periphery of the display in which
no picture is displayed when displaying images at 4:3 size or other reduced sizes, thus helping to prevent the burning
of side mask border lines into the screen caused by differences in the brightness of displayed images and the side
mask area. (Please refer to “5.4.3.4 Adjusting the side mask”.)
Adjustment is also possible using RS-232C commands (please refer to “5.5.4 List of RS-232C commands”).
4
Full mask (Full Screen Color Wash) setting
This function turns the entire screen a single color - white, red, green or blue - using a PDP internal signal (please
refer to “5.4.3.10 Setting FULL MASK”).
Setting is also possible using RS-232C commands (please refer to “5.5.4 List of RS-232C commands”).
In the case that an image has been burnt onto the screen, FULL MASK can be used as an emergency measure to
reduce the symptoms (although it will be impossible to completely remove the burnt-on image).
In addition, proper ‘aging’ of the screen through use of FULL MASK in advance will make the screen less prone to
the problem of images becoming burnt onto it.
5
Power control setting
In this setting, image burning does not occur easily on parts of an overall dark screen where the peak brightness is
not increased.
6
Orbiter mode setting
The display position on the screen is moved slightly.
7
Inverse mode (negative-positive reversal) setting
The image displayed is negative-positive reversed. It is an emergency measure taken in a case where a still image
has been burnt onto the screen during display to reduce the symptoms. (It cannot completely remove the burnt-on
image.)