Micro domes array capable of producing multicolor retroreflective graphics, method for fabricating the same, and system for generating pixelated graphic
AssigneeKorea Advanced Institute of Science and Technology
InventorsShin-Hyun Kim, Chaerim Son
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Abstract
A method for fabricating micro domes array according to an embodiment of the present invention includes forming a micro patterns array on a base substrate through a photolithography process, reflowing the micro patterns array to form micro dome patterns, forming a mold having concave curved surfaces corresponding to an inverse shape of the micro dome patterns, and forming a micro domes array using the mold. The micro domes array includes a base portion and a convex portion including micro domes protruding from a first surface of the base portion. A structural color is generated through retroreflection at convex surfaces of the micro domes.
Claims20
A method for fabricating micro domes array, the method comprising:
- forming a micro patterns array on a base substrate through a photolithography process;
- reflowing the micro patterns array to form micro dome patterns;
- forming a mold having concave curved surfaces corresponding to an inverse shape of the micro dome patterns;
- and
- forming a micro domes array using the mold,
- wherein the micro domes array includes a base portion and a convex portion including micro domes protruding from a first surface of the base portion, and
- a structural color is generated through retroreflection at convex surfaces of the micro domes.
A micro domes array including a base portion and a convex portion including micro domes protruding from a first surface of the base portion,
- wherein the base portion and the convex portion include a same material,
- wherein the micro domes include a first micro dome and a second micro dome, which have different curvature radii,
- wherein a first structural color generated by a light retroreflected at a convex surface of the first micro dome has a different color from a second structural color generated by a light retroreflected at a convex surface of the second micro dome.
A system for producing a pixelated graphic, including a micro domes array including a first pixel area and a second pixel area,
- wherein the first pixel area includes a plurality of first subpixel areas, and the second pixel area includes a plurality of second subpixel areas,
- wherein a first micro dome having a convex surface is disposed in at least one of the first subpixel areas, and a second micro dome having a convex surface with a curvature radius different from the convex surface of the first micro dome is disposed in at least one of the second subpixel areas,
- wherein a first structural color generated by a light retroreflected at the convex surface of the first micro dome has a different color from a second structural color generated by a light retroreflected at the convex surface of the second micro dome.
Dependencies are inferred from the claim text.