Samsung Sdi Co., Inc.

Tae-Kyong Kwon

Jae-Seok Jeong

Nam-Sung Jung

Im-Su Choi

Sang-Chul Kim

Cheol-Hong Kim

A plasma display panel displaying grayscales by a combination of brightness weights of a plurality of subfields in a frame. A peak subfield index of a current frame is generated based on a highest grayscale value detected from an input image data of the current frame, wherein the peak subfield index contains information of at least one subfield that is not used in the current frame. At least one period of reset, address, and sustain periods of the at least one subfield that is not used in the current frame is removed in response to a control signal and the peak subfield index of the current frame. The control signal is generated based on a comparison of a peak subfield index of a previous frame that has been delayed by one frame and the peak subfield index of the current frame.

Driving apparatus for plasma display panel and image processing method thereof

The apparatus for displaying plasma display panel (PDP) gray scales includes an automatic power controller for detecting an average signal level (ASL) in each field of video data; first and second frame memories for storing the video data in even and odd frames; a sub-field generator for mapping the video data according to the number of sub-fields, generating gray scale data, and selectively storing them in the frame memories; an address data generator for generating address data and applying them to the PDP; an ASL controller for comparing the numbers of sub-fields in each field with each other, and controlling the number of sub-fields; and a sustain scan pulse generator for receiving the number of sub-fields, generating sustain pulses and scan pulses, and applying them to the PDP.

Apparatus and method for displaying gray scales of plasma display panel

An image of each field displayed on a plasma display panel corresponding to input image signals is divided into sub-fields of different weights, the sub-fields being divided into two continuous sub-field groups having a different weighting value, and in which the weighting values of the sub-fields combine to display grays. The method includes generating original grays; determining a diffusion filter value; generating final grays by applying the diffusion filter value to the original grays; generating gray data corresponding to the final grays, the gray data being distributed over the two sub-field groups; and displaying an image on the PDP according to the gray data. The disclosed method and system reduce flicker and contour noise and other display problems associated with the display of 50 Hz Phase Alternating by Line image signals.

Image display method and system for plasma display panel

A method for displaying gray levels in a PDP by generating gray data corresponding to externally input image signals and displaying the gray data on the PDP is disclosed. The method comprises generating reference signals based on the image signals, determining a spread filter value according to states of the reference signals, applying the spread filter value to the gray data and generating final gray data, and displaying the final gray data on the PDP. The present invention reduces contour noise generated between moving pictures' adjacent grays.

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Cheonan, South Korea

Tae-Kyong Kwon