Method for driving a display device

Claim 1

A method for driving a liquid crystal display device comprising column electrodes and row electrodes, laid in a matrix of columns and rows so as to intersect with each other, and a display picture element disposed at each point of intersection between the column and row electrodes and adapted to be selectively set in one of bright and dark memory states. The driving method herein disclosed comprises; dividing, when a display of 2" (n being an integer not smaller than 3) is to be effected, the column electrodes into K groups of column electrodes wherein K is an integer not smaller than 2 and has the following relationship; defining the number Z of column electrode lines constituting each group of the column electrodes to have the following relationship; wherein Z is a positive integer and Y represents the number of the column electrodes; rendering one frame period T F , composed of (2"-1) blocks, to have the following relationship, wherein To represents the selection time during which the picture elements on each of the column electrodes are selectively set in one of the bright and dark memory states; selecting a predetermined one of the K groups of the column electrodes for a time width ZTo of each of the blocks so that each picture element on the selected one of the groups of the column electrodes can be set in one of the bright and dark memory states; and selecting a number of times not smaller than n the K groups of the column electrodes during each one-frame period T F according to a predetermined sequence.

Claim 2

A method for driving a liquid crystal display device comprising column electrodes and row electrodes, laid in a matrix of columns and rows so as to intersect with each other, and a display picture element disposed at each point of intersection between the column and row electrodes and adapted to be selectively set in one of bright and dark memory states. The driving method herein disclosed comprises; dividing, when a display of 2" (n being an integer not smaller than 3) is to be effected, the column electrodes into K groups of column electrodes wherein K is an integer not smaller than 2 and has the following relationship; defining the number Z of column electrode lines constituting each group of the column electrodes to have the following relationship; wherein Z is a positive integer and Y represents the number of the column electrodes; rendering one frame period T F , composed of (2"-1) blocks, to have the following relationship, wherein To represents the selection time during which the picture elements on each of the column electrodes are selectively set in one of the bright and dark memory states; selecting a predetermined one of the K groups of the column electrodes for a time width ZTo of each of the blocks so that each picture element on the selected one of the groups of the column electrodes can be set in one of the bright and dark memory states; and selecting a number of times not smaller than n the K groups of the column electrodes during each one-frame period T F according to a predetermined sequence.