Patent ID: 6057824
Filing Date: 2000-05-02
Classification: G09G

Abstract:
A display apparatus comprising:a display panel comprising a pair of oppositely disposed substrates having thereon a plurality of scanning electrodes and a plurality of data electrodes, and an optical modulation substance disposed between the substrates so as to form a pixel at each intersection of said scanning electrodes and said data electrodes; anddrive means for driving said display panel so that a period of each pixel being placed in a prescribed display state is determined within a frame period depending on given gradation data,said drive means further dividing one frame period into a first plurality of equivalent blocks of which a second plurality, smaller in number than the first plurality, of mutually non-neighboring blocks are allotted to a partial rewriting for selecting scanning electrodes corresponding to pixels to change display states, and the remaining blocks other than the second plurality of blocks within the first plurality of blocks are allotted to an entire picture scanning for selecting all the scanning electrodes,during the entire picture scanning, subjecting each scanning electrode to a plurality of selections including a first selection and a second selection within one frame period while setting an interval from the first to the second selection of each scanning electrode so as to provide a first prescribed ratio of the interval to said one frame period, andduring the partial rewriting, subjecting an identical scanning electrode to a plurality of selections including a first selection and a second selection within one block while setting an interval from the first to the second selection of the identical scanning electrode so as to provide a second prescribed ratio of the interval to said one block period, the second prescribed ratio being identical to said first prescribed ratio during the entire picture scanning, thereby allowing display of an identical number of gradation levels both in the entire picture scanning and in the partial rewriting.