METHOD AND APPARATUS FOR POWER LEVEL CONTROL OF A DISPLAY DEVICE

摘要

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 (21) 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-fields, the sub-field type, the sub-field positioning, the sub-field weight, the sub-field pre-scaling, a 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 frequency, the sustain pulse slope.