Pixel shift (contra burn-in)
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General remark: The complete text that follows on this page was extracted from the page "Pixel shift" in order to separate recording functions designated "Pixel shift" (see Pixel shift) from display protection functions that in some instances are also titled "Pixel shift".
The generalised page that encompasses all above (and more) is the page Pixel shifting.
Pixel shifting[edit]
The Pixel shifting function for displays is a method to prevent static images (such as station bugs and video game HUD elements) from causing image retention and screen burn-in in susceptible display types such as plasma and OLED.
Burn-in[edit]
Burn-in causes deficiencies and artefacts on screens that are visible even when the image that was responsible for burn-in disappears.
Burn-in occurs when a stationary image, i. e. the channel provider's logo, is displayed a a screen for a lengthier period of time, e.g. a few hours, causing pixels of one or more colour channels to age in a non-uniform manner as compared to pixels not . to retain a somewhat faded "ghost image" which will faintly show through subsequent images and videos for days or even perpetually.
Technical description[edit]
The entire video frame is moved periodically (vertically and/or horizontally) so there are effectively no static images that could cause burn-in.
Technical realisation[edit]
The firmware on some high end Samsung plasma TVs moves the video horizontally and vertically by some number of pixels every few minutes.[citation needed]
Some TVs allow the user to define the number of pixels moved and their interval.
On Panasonic plasma TVs this technique is named Pixel Orbiter. Sony uses the term Pixel Shift for this technique in its OLED displays, Philips - Pixel Orbiting, while LG calls it Screen Shift.
Related burn-in prevention methods[edit]
Pixel shifting is sometimes applied together with other burn-in prevention methods like screensaver or power management functions.
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