A method of driving a display device, the method comprising: determining each of a plurality of pixel rows of the display device as one of a motion picture display pixel row and a still image display pixel row; and driving the motion picture display pixel row with a motion picture frequency and driving the still image display pixel row with a still image display frequency, which is lower than or equal to the motion picture frequency, wherein a plurality of still image display pixel rows are driven with at least two still image display frequencies characterized by each pixel row being determined to be one of a motion picture display pixel row and a still image display pixel row by comparing image data of each of the pixel rows in a current frame and in a previous frame; and a pixel row of the still image display pixel rows, which is adjacent to the motion picture display pixel row, is driven with a higher frequency than a pixel row of the still image display pixel rows, which is distant from the motion picture display pixel row; wherein the driving of the still image display pixel row with the still image display frequency, which is lower than or equal to the motion picture frequency comprises: determining an optimization still image display frequency (Wall_Hz) corresponding to an optimization frequency for representing minimum power consumption; determining a first still image display frequency (U_Hz) for the still image display pixel row which is most distant from the motion picture display pixel row in a first still image display area positioned above the motion picture pixel row; and determining a second still image display frequency (L_Hz) for the still image display pixel row which is most distant from the motion picture display pixel row in a second still image display area positioned below the motion picture pixel row; wherein a still image display frequency of the still image display pixel rows in the first still image display area is gradually increased from the first still image display frequency (U_Hz) to the motion picture frequency as the still image display pixel rows go toward the motion picture display pixel row, and a still image display frequency of the still image display pixel rows in the second still image display area is gradually increased from the second still image display frequency (L_Hz) to the motion picture frequency as the still image display pixel rows go toward the motion picture display pixel row, wherein when the first still image display frequency (U_Hz) or the second still image display frequency (L_Hz) is lower than the optimization still image display frequency (Wall_Hz), a corresponding still image display pixel row is operated with the optimization still image display frequency (Wall_Hz). determining each of a plurality of pixel rows of the display device as one of a motion picture display pixel row and a still image display pixel row; and driving the motion picture display pixel row with a motion picture frequency and driving the still image display pixel row with a still image display frequency, which is lower than or equal to the motion picture frequency, wherein a plurality of still image display pixel rows are driven with at least two still image display frequencies determining an optimization still image display frequency (Wall_Hz) corresponding to an optimization frequency for representing minimum power consumption; determining a first still image display frequency (U_Hz) for the still image display pixel row which is most distant from the motion picture display pixel row in a first still image display area positioned above the motion picture pixel row; and determining a second still image display frequency (L_Hz) for the still image display pixel row which is most distant from the motion picture display pixel row in a second still image display area positioned below the motion picture pixel row; wherein a still image display frequency of the still image display pixel rows in the first still image display area is gradually increased from the first still image display frequency (U_Hz) to the motion picture frequency as the still image display pixel rows go toward the motion picture display pixel row, and a still image display frequency of the still image display pixel rows in the second still image display area is gradually increased from the second still image display frequency (L_Hz) to the motion picture frequency as the still image display pixel rows go toward the motion picture display pixel row, wherein when the first still image display frequency (U_Hz) or the second still image display frequency (L_Hz) is lower than the optimization still image display frequency (Wall_Hz), a corresponding still image display pixel row is operated with the optimization still image display frequency (Wall_Hz).