초록 ▼

A display medium employing a diffraction grating to define and represent a display pattern by the contour thereof, which enables the display pattern to move smoothly as the visual point moves and which allows the display pattern to move in various ways and is easy to produce. A display pattern ("DNP

A display medium employing a diffraction grating to define and represent a display pattern by the contour thereof, which enables the display pattern to move smoothly as the visual point moves and which allows the display pattern to move in various ways and is easy to produce. A display pattern ("DNP"), e.g., a character, an image, etc., is defined and displayed by the outer or inner contour of a diffraction grating (A or B) composed of a group of smooth curves, or a diffraction grating composed of a group of partial straight-line diffraction gratings that form polygonal lines linearly approximating smooth curves. Accordingly, as the visual point is moved relative to the display medium, a position that looks bright by diffraction moves smoothly and variously. If the display medium is illuminated by white light, the region that looks bright becomes a rainbow-colored region. Accordingly, the display pattern becomes not only readily recognizable but also interesting to view. Thus, display and design effects become extremely excellent. By varying the configuration of curves, the motion of the region that looks bright can be changed variously. Also disclosed is a method of producing a diffraction grating assembly for the display medium.

대표청구항 ▼

[ What we claim is:] [1.] A multiple display medium including a plurality of display patterns each composed of a diffraction grating assembly, each display pattern being divided into fine mesh pixels disposed at predetermined intervals, said mesh pixels corresponding at predetermined intervals at le

[ What we claim is:] [1.] A multiple display medium including a plurality of display patterns each composed of a diffraction grating assembly, each display pattern being divided into fine mesh pixels disposed at predetermined intervals, said mesh pixels corresponding at predetermined intervals at least one-dimensionally to a single display pattern such that said display medium is filled with the mesh pixels of all the display patterns without excess nor deficiency, with the original relative positions of said pixels being maintained, wherein in an oblique-line portion or a detail portion of any one of said display patterns, a mesh pixel which touches a contour line of said oblique-line portion or detail portion and which originally corresponded with another of said display patterns is changed to a pixel of said one display pattern when said mesh pixel has an area ratio of at least 50% to display said one display pattern.