Method and apparatus for preventing display screen burn-in
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United States of America Patent
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-
Jul 17, 2001
Grant Date -
N/A
app pub date -
Nov 23, 1998
filing date -
Nov 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When viewing a 4:3 aspect ratio image on a widescreen display, disturbing black bands appear to the left and right of the displayed image. Similarly, when viewing a letterbox image on a 4:3 aspect ratio display, disturbing black bands appear above and below the displayed image. These black bands result in uneven ageing of the phosphors in the display screen. An apparatus is provided which detects these black bands and automatically expands the image in the appropriate direction such that these black bands are automatically eliminated.
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