1. A display panel for a 3-dimensional display device, the display panel comprising: a plurality of unit pixels arranged in a matrix form having a row and column, each unit pixel including a plurality of sub-pixels, the plurality of unit pixels being alternately arranged with pixels for a viewer's left eye and pixels for the viewer's right eye, wherein arrangement of sub-pixels of at least one unit pixel is different from that of another unit pixel, wherein the plurality of sub-pixels are arranged so that a sub-pixel arranged at a leftmost side of a first unit pixel is a same color as a sub-pixel arranged at a rightmost side of a second unit pixel located adjacently in a row direction of the first unit pixel and so that the sub-pixel located in at the leftmost side of the first unit pixel is a same color as a sub-pixel arranged at a rightmost side of a third unit pixel located adjacently in a column direction of the first unit pixel, wherein each of the plurality of sub-pixels has one color, and wherein colors of the plurality of sub-pixels in the unit pixel are different from each other.