Importance

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Abstract

There is provided a method of driving a matrix type flat panel display device, by which the selection time 2.tau. can be set to a longer time as compared to the prior art frame period shortened scanning method wherein the scanning line are divided into plural groups. One frame period T.sub.f includes plural fields, at least one of the fields has a number of blocks different from the block numbers of other fields, all scanning lines are also divided into a number of groups so that the number of divided scanning line groups is at least equal to the total block numbers included in each frame period, the writing time period included in the first block of each field having a time period including selection time periods for all fields so that the selection time period for each field does not overlap with the selection time periods for other fields. Flicker is prevented by an interlace scanning along the scanning lines of respective groups in such a manner that the fields having the same graduation level are not scanned one after another in the direction cross to the scanning lines at right angle.

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First Claim