A method for displaying an image on an image displaying device, the image displaying device comprising a plurality of pixels including light emitting elements, the method including steps of: comparing gray scale level of an image signal for the light emitting element with a threshold level; and when the gray scale level is higher than the threshold level, driving the light emitting element by a driving signal corresponding to the gray scale level, and when the gray scale level is lower than the threshold level, driving the light emitting element by a dithering driving signal including a driving signal corresponding to the threshold level; characterized in that the method further comprising: obtaining a type of a displayed image and a total luminance of the image, the type of displayed image including still image and moving images; and setting the threshold level depending on the determined type of a displayed image and the determined total luminance of the image such that: when the determined type of the image is moving images, a low threshold thL level is set, when the determine type of the image is still image, a high threshold level thH is set, when the determined type of the image is a still image and the determined total luminance of the image is lower than a reference luminance, a higher threshold level thHH is set, wherein thL < thH < thHH. comparing gray scale level of an image signal for the light emitting element with a threshold level; and when the gray scale level is higher than the threshold level, driving the light emitting element by a driving signal corresponding to the gray scale level, and when the gray scale level is lower than the threshold level, driving the light emitting element by a dithering driving signal including a driving signal corresponding to the threshold level; characterized in that the method further comprising: obtaining a type of a displayed image and a total luminance of the image, the type of displayed image including still image and moving images; and setting the threshold level depending on the determined type of a displayed image and the determined total luminance of the image such that: when the determined type of the image is moving images, a low threshold thL level is set, when the determine type of the image is still image, a high threshold level thH is set, when the determined type of the image is a still image and the determined total luminance of the image is lower than a reference luminance, a higher threshold level thHH is set, wherein thL < thH < thHH. obtaining a type of a displayed image and a total luminance of the image, the type of displayed image including still image and moving images; and setting the threshold level depending on the determined type of a displayed image and the determined total luminance of the image such that: when the determined type of the image is moving images, a low threshold thL level is set, when the determine type of the image is still image, a high threshold level thH is set, when the determined type of the image is a still image and the determined total luminance of the image is lower than a reference luminance, a higher threshold level thHH is set, wherein thL < thH < thHH. when the determined type of the image is moving images, a low threshold thL level is set, when the determine type of the image is still image, a high threshold level thH is set, when the determined type of the image is a still image and the determined total luminance of the image is lower than a reference luminance, a higher threshold level thHH is set, wherein thL < thH < thHH.