Patent ID: 6630916
Filing Date: 2003-10-07
Classification: G09G,H01J

Abstract:
A method for driving a flat display panel with a gradation of visual brightness, the display panel having a plurality of pixels arranged in plural lines, each line having plural pixels and each pixel having a memory function, the method comprising:dividing, with time, each frame to be displayed on said display panel into a respective plurality of successive subframes, the subframes having respective, predetermined weights of brightness gradations and being individually selected to determine the brightness gradation of the respective frame, each subframe being applied at a common timing with respect to all of the plural lines of the display panel; further dividing, with time, each of the subframes into respective, first and second successive time periods, each time period having a respective, common timing with respect to all of the plural lines forming the display panel; controlling respective timings of a start of the first time period and of an end of the second time period of each subframe to be in common for all of the plural lines forming the display panel; setting the time duration of the second time period of each subframe in correspondence to the respective weight of the brightness gradation of that subframe; in the first time period of each subframe, writing display data in corresponding pixels of the display panel by selectively forming a memory medium in each of the corresponding pixels; in the second time period of each subframe, concurrently producing a display in each corresponding pixel in which a respective memory medium was formed in the first time period, for the respective time duration of the second time period of the subframe; and repeating the operations of the subframe with the first time period and the second time period so as to display a picture with gradation.