Patent ID: 7501997
Filing Date: 2009-03-10
Classification: G09G

Abstract:
1. A display panel driving method of gray-level-driving a display panel, having a plurality of pixel cells as pixels arranged on each of display lines, every one of a plurality of sub-fields of a frame display period according to pixel data based on a video signal and corresponding to the pixels, comprising the steps of: causing a state of the pixel cells to transfer from one state into another state of on and off modes only within one of the sub-fields of the frame display period according to the pixel data, to maintain emissions only on the on-mode pixel cells in each of the sub-fields a number of times assigned to the sub-field; wherein executing a first process for making the sub-field different between display lines adjacent in the number of M, for causing the state of the pixel cells to transfer from the one state into the other state, in a particular sub-field group having sub-fields in number of M (M: integer of 2 or greater) arranged successive within the frame display period and in a subsequent sub-field group among sub-field groups subsequent to the particular sub-field group; and within the particular sub-field group, executing a second process for causing the state of the pixel cells to transfer from the one state into the other state only within a predetermined one of the sub-fields of the particular sub-field group when a gray-level represented by said pixel data is equal to a predetermined level, and executing the first process when the gray-level represented by said pixel data is one step higher that said predetermined level.