Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2006-01-24
2006-01-24
Chang, Kent (Department: 2673)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S060000
Reexamination Certificate
active
06989828
ABSTRACT:
Plasma Display Panels (PDP) are becoming more and more interesting for TV technology. One important criterion for picture quality is the Peak White Enhancement Factor (PWEF). From a previous patent application of the applicant it is known to have a table of power level modes in a control unit for the display device. The average picture power value is measured and a corresponding power level mode will be selected from the table for sub-field coding. The power level modes have been made variable in respect to a number of parameters, namely:the number of sub-fieldsthe sub-field typethe sub-field positioningthe sub-field weightthe sub-field pre-scalinga factor for the sub-field weights which is used to vary the amount of small pulses generated during each sub-field.According to the invention it is now proposed to use one or both of the following parameters in addition for varying the power level modes:the sustain frequencythe sustain pulse slope.
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Euorpean Search Report, Mar. 20, 2003.
Correa Carlos
Roth Harald
Weitbruch Sébastien
Chang Kent
Fried Harvey D.
Henig Sammy S.
Thomson Licensing S.A.
Tripoli Joseph S.
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