Staas & Halsey LLP
Plasma display apparatus
A plasma display apparatus, in which the display quality of a dark image is improved and which uses a subfield method, has been disclosed. The plasma display apparatus comprises a plasma display panel, a sustain pulse cycle changing means for detecting the display load ratio of each subfield and changing the sustain pulse cycle of each subfield according to the display load ratio, and an adaptive subfield number changing means for calculating a vacant time in a display frame generated by changing the sustain pulse cycle, judging whether a subfield can be added according to the vacant time, and determining the number of subfields in the display frame.
Fujitsu Hitachi Plasma Display Limited
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Yasuji Masanori Shunji Yutaka
Noguchi Takeuchi Oota Chiaki