Patent ID: 7956874

Claim:
A display apparatus that displays a picture based on a video signal, comprising: a moving picture determiner that determines whether the video signal is used for displaying a moving picture; a moving picture gradation level table that stores information about a moving picture gradation level group for displaying the moving picture; a still picture gradation level table that stores information about a still picture gradation level group to display a still picture; and a gradation level converter that converts the video signal to have the gradation level of the moving picture gradation level group or the still picture gradation level group according to results of the determination, wherein a first number of first still picture gradation levels which exist between first adjacent gradation levels in the moving gradation level group is different from a second number of second still picture gradation levels which exist between second adjacent gradation levels in the moving gradation level group, and a gradation level difference between the first adjacent gradation levels is larger than a predetermined reference gradation level difference.