Patent ID: 6127991
Filing Date: 2000-10-03
Classification: G09G

Abstract:
A method of driving a flat panel display apparatus for multi-gradation display whereinsetting each of a plurality of subfield periods to a pixel lighting period in accordance with a relative brightness ratio in one field period constituted of said plurality of subfield periods to display a desired brightness,dividing multiple gradations into a plurality of gradation groups between a lower brightness and a higher brightness, determining to which of said plurality of gradation groups a brightness level indicated by original image data belongs,selecting either one of a plurality of subfield period groups which are prepared by combining predetermined subfield periods of said plurality of subfield periods, by determining to which one of said plurality of gradation groups said original image data belongs, so that a difference in brightness between gradations in a gradation group on a lower brightness side among said plurality of gradation groups is smaller than a difference in brightness between gradations in a gradation group on a higher brightness side,associating said original image data with the respective subfield periods in said selected subfield period group, and performing the multi-gradation display by controlling lighting and non-lighting of each pixel in the subfield period.