Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2006-07-18
2006-07-18
Lefkowitz, Sumati (Department: 2675)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S211000, C345S060000, C345S041000
Reexamination Certificate
active
07079126
ABSTRACT:
Plasma Display Panels are becoming more and more interesting for TV technology. One important criterion for picture quality is the Peak White Enhancement Factor PWEF. In a previous patent application a method for power level control in a display with which the PWEF can be increased has been proposed. With an increased PWEF the problem of local overheating of plasma cells may occur. This invention proposes a protection circuit, which deals with this problem. For protecting the plasma display against local overheating, there is provided a method, which performs the steps of local power value determination, local temperature estimation, maximum local temperature determination and maximum power level limit determination. The power level limit influences the power level control process in the display device so that local overheating is avoided and the highest possible PWEF can be used. The invention also concerns a corresponding apparatus for carrying out the proposed method.
REFERENCES:
patent: 888 004 (1998-12-01), None
patent: 0888004 (1998-12-01), None
patent: 924 683 (1999-06-01), None
patent: 11-194745 (1999-07-01), None
Correa Carlos
Weitbruch Sébastien
Zwing Rainer
Fried Harvey D.
Henig Sammy S.
Kumar Srilakshmi K
Laks Joseph J.
Lefkowitz Sumati
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