Method and apparatus for reducing dynamic false contour in plasma display panel by decreasing visual concentration difference

An apparatus for reducing dynamic false contour in a plasma display panel (PDP) having a plurality of discharge units, the apparatus comprising:

• a conversion circuit having a visual concentration conversion table so that the conversion circuit is operable to identify a value of gray scale of each discharge unit when receives an input field signal, convert the value of gray scale of each discharge unit into a plurality of sets of the different visual concentration series and at least one set of a virtual visual concentration series all having the same value of gray scale by the visual concentration conversion table;
• a control circuit for receiving vertical synchronous signals and timing pulse signals;
• and
• a multiplexer coupled to the conversion circuit and the control circuit, the multiplexer being operable to determine a current output field based on the signals sent from the control circuit, selecting a corresponding field from a plurality of sets of input fields generated by the conversion circuit, and output the selected field to a display circuit for driving each discharge unit, whereby when the fields are continuously shown on the PDP a visual concentration of different values of gray scale shown by any two of the adjacent discharge units is averaged to obtain ones having smaller visual concentration difference.