Certain embodiments provide a display device a plurality of subpixels arranged in a first direction and a second direction perpendicular to the first direction to form a matrix, and each having an aperture provided with a color component; and an optical controller provided to be opposed to the display device having a plurality of rectilinear optical apertures extending in the second direction are arranged in the first direction. A shape of the aperture in the subpixel is depending upon a condition that the apertures in the subpixels adjacent to each other in the first direction have a nonoverlapping region which is a nonoverlapping region in the second direction and a condition that an aperture ratio indicating a ratio of the aperture to the subpixel in length in the second direction is substantially constant in one line in the second direction irrespective of a position in the first direction.