System for gracefully aging inactive areas of a video display

Details System for gracefully aging inactive areas of a video display System for gracefully aging inactive areas of a video display

2005-04-05

2008-10-21

Tran, Trang U (Department: 2622)

Television

Cathode-ray tube burn-in prevention

C348S556000, C348S445000

Reexamination Certificate

active

07440006

ABSTRACT:
When a video display system displays an image having an aspect ratio that differs from the aspect ratio of the system's display monitor, the image spans only an “active” portion of the available display area on the monitor. The display system sets the luminance and/or chrominance of pixels in the inactive areas of the monitor to match the average luminance and/or chrominance of a selected group of pixels forming the image in the active area. This helps prevent ghosting by aging the phosphors or other material forming the pixels in the active and inactive areas at the same rate.

REFERENCES:
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patent: 5291295 (1994-03-01), Srivastava
patent: 6262772 (2001-07-01), Shen et al.
patent: 6359398 (2002-03-01), Nakajima et al.
patent: 6429894 (2002-08-01), Hicks
patent: 7084924 (2006-08-01), Topper et al.
patent: 7129992 (2006-10-01), Barnichon
patent: 7245316 (2007-07-01), Grimes et al.

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