A method for controlling a multi-gradation display and a multi-gradation display device

Claim 3

The method according to claim 1, wherein one of the row direction size and the column direction size of the effective dot matrix is not variable irrespective of grada­tions of the image to be displayed, and the other of the sizes is variable into two kinds of effective dot matrices in accordance with the image to be displayed.

Claim 4

The method according to claim 1, wherein the size of the other direction of the effective dot matrix includes at least two of 3 dots, 5 dots and 8 dots.

Claim 5

The method according to claim 1, wherein the ef­fective dots in the effective dot matrix are scattered in the row direction.

Claim 6

The method according to claim 1, wherein the ef­fective dots in the effective dot matrix are scattered in the row direction and in the column direction, and the ef­fective dots in one row become adjacent with low probabi­lity to the effective dots in a preceding or following fra­mes.

Claim 7

The method according to claim 1, wherein the posi­tions of the effective dots in the effective dot matrix are shifted by a set dot number in a set direction every frame.

Claim 8

A multi-gradation display comprising: display means having a number of dots for displaying an image which are formed in a matrix at the crossing points of a plurality of signal electrodes (3₁-3₆₄₀) paral­lel with each other and a plurality of scanning electrodes (2₁-2₂₀₀) parallel with each other; scanning electrodes driving means (4) for supplying scanning signals to the respective scanning electrodes in a sequential order; signal electrodes driving means (5) for supplying data signals to the respective signal electrodes; and electrode driving means for making the dots at those of the crossed positions where the scanning signals and the data signals meet effective for display an image, the signal electrodes driving means (5) comprising: gradation data output means (6) for outputting grada­tion data for instructing gradations of an image to be dis­played in the unit of dot; effective dot matrices generating means (7) for gene­rating the effective dot matrix a distribution of the ef­fective dots is based on and outputs effective signals for generating the effective dot matrix in more than two kinds of sizes which are different in the direction of row of the scanning electrodes in accordance with a gradation; and output gate means (GT₁-GT₈) for outputting data sig­nals for making the dots effective based on outputs of the gradation data output means and of the effective dot matri­ces generating means.

Claim 9

A multi-gradation display comprising: display means having a number of dots for displaying an image which are formed in a matrix at the crossing points of a plurality of signal electrodes (3₁-3₆₄₀) paral­lel with each other and a plurality of scanning electrodes (2₁-2₂₀₀) parallel with each other; scanning electrodes driving means (4) for supplying scanning signals to the respective scanning electrodes in a sequential order; signal electrodes driving means (5) for supplying data signals to the respective signal electrodes; and electrode driving means for making the dots at those of the crossed positions where the scanning signals and the data signals meet effective for display an image, the signal electrodes driving means (5) comprising: gradation data output means (6) for outputting grada­tion data for instructing gradations of an image to be dis­played in the unit of dot; effective dot matrices generating means (7) for gene­rating the effective dot matrix a distribution of the ef­fective dots is based on and outputs effective signals for generating the effective dot matrix in more than two kinds of sizes which are different in the direction of row of the scanning electrodes in accordance with a gradation; and output gate means (GT₁-GT₈) for outputting data sig­nals for making the dots effective based on outputs of the gradation data output means and of the effective dot matri­ces generating means.

Claim 10

The display according to claim 7, wherein the scanning electrodes driving means (4) has a higher number of scanning signal output terminals than the number of scanning electrodes (2₁-2₂₀₀).

Claim 11

The display according to claim 7, wherein the dif­ference between the number of scanning electrodes (2₁-2₂₀₀) and the number of scanning signal output terminals of the scanning electrodes driving means (4) is neither equal to nor an even number multiple of the number of dots of the effective dot matrices in the direction of the scanning electrodes.