COLOR DEVELOPING STRUCTURE, DISPLAY, COLOR-PRODUCING SHEET, MOLDING, AND METHOD FOR PRODUCING COLOR DEVELOPING STRUCTURE
First Claim
1. A color developing structure, comprising:
- an uneven layer having an uneven structure on a surface thereof; and
an optical functional layer containing a multilayer film layer positioned on the uneven structure and having a surface shape that follows the shape of the uneven structure, where layers adjacent in the multilayer film layer have different refractive indices, of incident light entering the multilayer film layer, the reflectance of light in a specific wavelength band is higher than the reflectance of light in wavelength bands other than the specific wavelength band, and an outermost layer of the optical functional layer on a side opposite to the uneven layer has a function to protect a layer lower than the outermost layer, whereina first direction and a second direction orthogonal to the first direction are directions along a virtual plane that is a virtual surface on which the uneven structure is projected in the thickness direction of the uneven layer,projections that constitute the uneven structure have a shape with one or more steps, a pattern constituted from projected images of the projections in the virtual plane includes a pattern comprising a set of shape elements in which a length along the second direction is equal to or greater than a length along the first direction, andthe length of the shape elements along the first direction is equal to or less than sub-wavelength, and in the set of shape elements, the standard deviation of the length along the second direction is larger than the standard deviation of the length along the first direction.
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Accused Products
Abstract
A color developing structure has an uneven layer with an uneven structure on a surface thereof, a multilayer film layer positioned on the uneven structure and having a surface shape that follows the uneven structure, and a protective layer covering the surface of the multilayer film layer. Projections that constitute the uneven structure have a shape with one or more steps, a pattern constituted from projected images of the projections in a virtual plane on which the uneven structure is projected in the thickness direction of the uneven layer includes a pattern comprising a set of a plurality of rectangles in which a length along a second direction is equal to or greater than a length along a first direction, the length of the rectangles along the first direction is equal to or less than subdirection is greater than the standard deviation of the length along the first direction.
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Citations
15 Claims
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1. A color developing structure, comprising:
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an uneven layer having an uneven structure on a surface thereof; and an optical functional layer containing a multilayer film layer positioned on the uneven structure and having a surface shape that follows the shape of the uneven structure, where layers adjacent in the multilayer film layer have different refractive indices, of incident light entering the multilayer film layer, the reflectance of light in a specific wavelength band is higher than the reflectance of light in wavelength bands other than the specific wavelength band, and an outermost layer of the optical functional layer on a side opposite to the uneven layer has a function to protect a layer lower than the outermost layer, wherein a first direction and a second direction orthogonal to the first direction are directions along a virtual plane that is a virtual surface on which the uneven structure is projected in the thickness direction of the uneven layer, projections that constitute the uneven structure have a shape with one or more steps, a pattern constituted from projected images of the projections in the virtual plane includes a pattern comprising a set of shape elements in which a length along the second direction is equal to or greater than a length along the first direction, and the length of the shape elements along the first direction is equal to or less than sub-wavelength, and in the set of shape elements, the standard deviation of the length along the second direction is larger than the standard deviation of the length along the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for producing a color developing structure, comprising the steps of:
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a step of transferring unevenness of an intaglio plate to a resin using a nanoimprint method to thereby form an uneven layer having an uneven structure on a surface thereof; and a step of forming an optical functional layer containing a multilayer film layer on the uneven structure, where layers adjacent in the multilayer film layer have different refractive indices, of incident light entering the multilayer film layer, the reflectance of light in a specific wavelength band is higher than the reflectance of light in wavelength bands other than the specific wavelength band, and an outermost layer of the optical functional layer on a side opposite to the uneven layer has a function to protect a layer lower than the outermost layer, wherein a first direction and a second direction orthogonal to the first direction are directions along a virtual plane that is a virtual surface on which the uneven structure is projected in the thickness direction of the uneven layer, in the step of forming the uneven layer, the uneven structure is formed so that a pattern constituted in the virtual plane from projected images of projections with one or more steps that constitute the uneven structure includes a pattern comprising a set of shape elements in which a length along the second direction is equal to or greater than a length along the first direction, and the length of the shape elements along the first direction is equal to or less than sub-wavelength, and in the set of shape elements, the standard deviation of the length along the second direction is larger than the standard deviation of the length along the first direction.
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Specification