A display device comprising: a display panel configured by sequentially arranging a plurality of pixels in a horizontal direction and a vertical direction with one pixel being formed by a plurality of color component cells (272, 274, 276) respectively including an individual bus line, and displaying a two-dimensional or a three-dimensional image through an application of a signal to the bus line; a polarization control filter placed to a front of the display panel, alternately changing a polarization state of light transmitting the panel unit for every predetermined horizontal region; and a signal control unit (120, 113) controlling a signal applied to the bus line when displaying a two-dimensional image or a three-dimensional image on the display panel, wherein the polarization control filter is arranged so that each boundary at which the polarization state changes is within a range of one row of cells, and wherein the signal control unit controls the application of a signal to the bus line when displaying a three-dimensional image so that each row of cells positioned at a boundary at which the polarization state of the polarization control filter changes is displayed in black, characterized in that each pixel arranges cells of three colors in order in the vertical direction, and the display panel has a horizontal arrangement structure of arranging cells of each horizontal line in the same color, wherein the polarization control filter is arranged so that each boundary at which the polarization state changes is within the range of every row with three rows of cells therebetween, and wherein the signal control unit controls the application of a signal to the bus line when displaying a three-dimensional image so that each row of cells with three rows therebetween positioned at a boundary at which the polarization state of the polarization control filter changes is displayed in black. a display panel configured by sequentially arranging a plurality of pixels in a horizontal direction and a vertical direction with one pixel being formed by a plurality of color component cells (272, 274, 276) respectively including an individual bus line, and displaying a two-dimensional or a three-dimensional image through an application of a signal to the bus line; a polarization control filter placed to a front of the display panel, alternately changing a polarization state of light transmitting the panel unit for every predetermined horizontal region; and a signal control unit (120, 113) controlling a signal applied to the bus line when displaying a two-dimensional image or a three-dimensional image on the display panel, wherein the polarization control filter is arranged so that each boundary at which the polarization state changes is within a range of one row of cells, and wherein the signal control unit controls the application of a signal to the bus line when displaying a three-dimensional image so that each row of cells positioned at a boundary at which the polarization state of the polarization control filter changes is displayed in black, characterized in that each pixel arranges cells of three colors in order in the vertical direction, and the display panel has a horizontal arrangement structure of arranging cells of each horizontal line in the same color, wherein the polarization control filter is arranged so that each boundary at which the polarization state changes is within the range of every row with three rows of cells therebetween, and wherein the signal control unit controls the application of a signal to the bus line when displaying a three-dimensional image so that each row of cells with three rows therebetween positioned at a boundary at which the polarization state of the polarization control filter changes is displayed in black.