A display member according to this invention includes a plurality of pixels. At least one of the plurality of pixels includes a relief structure formation layer including a first region configured to display a predetermined color on a condition, and a second region different from the first region, a first layer made of a first material, and covering at least the first region, and a second layer made of a second material different from the first material, and covering the first layer. The display member displays an image based on a distribution of the first region on the condition that the display member is observed in the oblique direction, and displays an image based on a distribution of the second region on a condition that the display member is observed with transmitted light.

An optical device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. In some examples, individual ones of the first and second segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the first and second segments can comprise transparent and non-transparent regions. Some examples can incorporate more than one region producing an optical effect.

An optical device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. In some examples, individual ones of the first and second segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the first and second segments can comprise transparent and non-transparent regions. Some examples can incorporate more than one region producing an optical effect.

A display element including a layer with a protrusion-recess structure and a multilayer film layer disposed on the protrusion-recess structure and with a surface shape following the protrusion-recess structure. A pattern formed by the protrusion includes a plurality of shape elements when the protrusion-recess structure is viewed in a direction perpendicular to the surface. Each shape element has a length extending in one extending direction, larger than a length in a width direction perpendicular to the extending direction. The length in the width direction is equal to or less than a sub-wavelength. A standard deviation of the length in the extending direction is larger than a standard deviation of the length in the width direction. The display elements include a first display element and a second display element. The extending directions of the first display element and the second display element are different from each other.

A display element including a layer with a protrusion-recess structure and a multilayer film layer disposed on the protrusion-recess structure and with a surface shape following the protrusion-recess structure. A pattern formed by the protrusion includes a plurality of shape elements when the protrusion-recess structure is viewed in a direction perpendicular to the surface. Each shape element has a length extending in one extending direction, larger than a length in a width direction perpendicular to the extending direction. The length in the width direction is equal to or less than a sub-wavelength. A standard deviation of the length in the extending direction is larger than a standard deviation of the length in the width direction. The display elements include a first display element and a second display element. The extending directions of the first display element and the second display element are different from each other.

The present invention relates to layer composites comprising at least one opaque layer a) and at least one transparent layer b), wherein the Vicat softening temperature B/120 determined according to ISO 306:2004 (method B120 50N; 120° C.) of layer a) is ≥156° C., preferably from ≥156° C. to ≤250° C., particularly preferably from ≥156° C. to ≤230° C., and wherein the Vicat softening temperature B/120 determined according to ISO 306:2004 (method B120 50N; 120° C./h), of layer a) is higher than that of layer b), a method for producing such layer composites and security documents, preferably identification documents, comprising such a layer structure.

A redundantly printed security-enhanced document, printing method, and system for better ensuring that the meaning of the information imparted by variable indicia printed by redundant printing indicia on a document protected by a removable Scratch-Off Coating (SOC). By printing the variable indicia with multiple colors, redundancy and integrity of the intended indicia is achieved relative to the perception of human eye photoreceptor cones. The redundantly printed document, methods, and systems enhance the overall appearance of the redundantly printed document, and reduce possible consequences resulting from misprinted variable indicia.

A redundantly printed security-enhanced document, printing method, and system for better ensuring that the meaning of the information imparted by variable indicia printed by redundant printing indicia on a document protected by a removable Scratch-Off Coating (SOC). By printing the variable indicia with multiple colors, redundancy and integrity of the intended indicia is achieved relative to the perception of human eye photoreceptor cones. The redundantly printed document, methods, and systems enhance the overall appearance of the redundantly printed document, and reduce possible consequences resulting from misprinted variable indicia.

An RGB and/or CMYK full color optical display device comprising multiple nanostructure arrays configured to provide display of a wide range of colors corresponding to multiple pixels or sub-regions of an image is disclosed, where the multiple nanostructure arrays may be formed on a single substrate layer. An optical display device includes a substrate having a surface, and a first pixel of a color image comprising first and second sub-pixels according to at least one of an additive and subtractive color scheme, where the first sub-pixel comprises a first optical sub-wavelength nanostructure array formed on or in the surface of the substrate, and where the second sub-pixel comprises a second optical sub-wavelength nanostructure array formed on or in the surface of the substrate. A method of manufacturing an RGB and/or CMYK full color optical display comprising multiple nanostructure arrays arranged as sub-pixels according to a color scheme is also disclosed.

An RGB and/or CMYK full color optical display device comprising multiple nanostructure arrays configured to provide display of a wide range of colors corresponding to multiple pixels or sub-regions of an image is disclosed, where the multiple nanostructure arrays may be formed on a single substrate layer. An optical display device includes a substrate having a surface, and a first pixel of a color image comprising first and second sub-pixels according to at least one of an additive and subtractive color scheme, where the first sub-pixel comprises a first optical sub-wavelength nanostructure array formed on or in the surface of the substrate, and where the second sub-pixel comprises a second optical sub-wavelength nanostructure array formed on or in the surface of the substrate. A method of manufacturing an RGB and/or CMYK full color optical display comprising multiple nanostructure arrays arranged as sub-pixels according to a color scheme is also disclosed.