Apparatus for controlling drive-power of plasma display panel and a method therefor
AssigneeSamsung SDI Co., Ltd.
InventorYoon-phil Eo
Life of this patent
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Abstract
An apparatus for controlling the drive power of a plasma display panel in an driving apparatus of the plasma display panel. The apparatus preestimates a load ratio of an input video signal on a frame-by-frame basis, controls a number of display-discharge pulses in a corresponding frame to be inversely proportional to the preestimated load ratio, measures correlation of each frame with a preceding frame, controls the output timing of a discharge number controller according to the correlation and regulates a rate of change of the number of display-discharge pulses in a frame. The number of display discharge pulses in a frame is regulated to change more rapidly where the correlation is low and than where the correlation is high.
Claims6
A method for controlling drive power of a plasma panel display, the method comprising:
- preestimating a load ratio, the load ratio being a ratio of a number of discharge cells to be display-discharged during a present frame to a total number of discharge cells in the plasma display panel;
- determining a number of display-discharge pulses for the present frame, the determined number of display-discharge-pulses being inversely proportional to the preestimated load ratio for the present frame;
- measuring a correlation of the present frame of a video signal with a preceding frame of the video signal to obtain a correlation value;
- and
- regulating a rate of change of the number of display-discharge pulses between the preceding frame and the present frame depending on the correlation value.
An apparatus for controlling the drive power of a plasma display panel, the apparatus comprising:
- a load ratio preestimator which preestimates a load ratio for a frame of an input video signal, the load ratio being a ratio of a number of discharge cells to be display-discharged to a total number of discharge cells in the plasma display panel;
- a discharge number controller which controls a number of display-discharge pulses in the frame to be inversely proportional to the preestimated load ratio for the frame;
- a correlation number counter which processes the input video signals and measures a correlation of the frame with a preceding frame thereof;
- and
- a control-timing regulator which controls an output timing of the discharge number controller according to the measured correlation and regulates a rate of change of the number of display-discharge pulses in the frame such that a transition resulting from a change in the number of display-discharge pulses in the preceding frame and the number of display-discharge pulses in the frame is regulated according to the measured correlation.
Dependencies are inferred from the claim text.