Patent ID: 8416352

Claim:
A marker designed to be formed on a display panel for positional alignment between an optical image separation element and the display panel in a fabrication process of a display device comprising the optical image separation element and the display panel, the marker comprising: first marker element pieces for a first viewpoint, which are formed by dividing a first marker element for the first viewpoint in such a way as to have widths equal to a predetermined marker element pitch; and second marker element pieces for a second viewpoint, which are formed by dividing a second marker element for the second viewpoint in such a way as to have widths equal to the marker element pitch, wherein the first marker element and the second marker element are different in plan shape from each other, the first marker element pieces and the second marker element pieces are arranged in a predetermined order at the marker element pitch along an optical image separation direction of the optical image separation element, thereby forming a pattern, a predetermined number of the first marker element pieces and the second marker element pieces adjoining to each other constitute one repetition cycle, a width of the repetition cycle being in accordance with an arrangement pitch of constituent elements of the optical image separation element, and each of the first marker element piece and the second marker element piece is obtained by scaling down its initial plan shape (1/a number of the first and second marker element pieces included in the repetition cycle) along the optical image separation direction.