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, wherein the display panel is configured by arranging cells of four colors formed of the three colors of red, green, and blue and a color other than the three colors in order in the horizontal direction, and shifting a formation position of each color by two columns for each row of cells, 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 two 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 two 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, wherein the display panel is configured by arranging cells of four colors formed of the three colors of red, green, and blue and a color other than the three colors in order in the horizontal direction, and shifting a formation position of each color by two columns for each row of cells, 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 two 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 two rows therebetween positioned at a boundary at which the polarization state of the polarization control filter changes is displayed in black.