Luminescent pigments and foils with color-shifting properties

A luminescent color-shifting pigment flake, comprising:

• a first absorber layer;
• a first dielectric layer overlying the first absorber layer;
• a reflector layer overlying the first dielectric layer;
• a second dielectric layer overlying the reflector layer;
• a second absorber layer overlying the second dielectric layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting pigment flake, comprising:

• a core layer;
• a dielectric layer substantially surrounding the core layer;
• an absorber layer substantially surrounding the dielectric layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting pigment flake, comprising:

• a core reflector layer having a top surface, a bottom surface, and at least one side surface;
• a dielectric layer overlying the top surface and the bottom surface but not on at least one side surface of the reflector layer;
• an absorber layer substantially surrounding the dielectric layer and in contact with at least one side surface of the reflector layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting pigment flake, comprising:

• a core layer;
• a reflector coating substantially surrounding the core layer;
• a dielectric layer substantially surrounding the reflector coating;
• an absorber layer substantially surrounding the dielectric layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting pigment flake, comprising:

• a core layer;
• a first absorber layer substantially surrounding the core layer;
• a dielectric layer substantially surrounding the first absorber layer;
• a second absorber layer substantially surrounding the dielectric layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting pigment flake, comprising:

• a first absorber layer;
• a dielectric layer overlying the first absorber layer;
• a second absorber layer overlying the dielectric layer;
• and
• at least one luminescent material incorporated into the pigment flake;
• wherein the pigment flake exhibits a discrete color shift such that the pigment flake has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A luminescent color-shifting foil, comprising:

• a reflector layer;
• a dielectric layer overlying the reflector layer;
• an absorber layer overlying the dielectric layer;
• and
• one or more luminescent materials incorporated into the foil;
• wherein the foil exhibits a discrete color shift such that the foil has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A color-shifting foil device, comprising:

• a carrier substrate;
• a first absorber layer overlying the carrier substrate;
• a dielectric layer overlying the first absorber layer;
• a second absorber layer overlying the dielectric layer;
• and
• one or more luminescent materials incorporated into the foil;
• wherein the foil exhibits a discrete color shift such that the foil has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.

A method of fabricating a luminescent pigment flake or foil material that exhibits a discrete color shift such that the material has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing, the method comprising:

• providing one or more reflector layers;
• forming one or more dielectric layers over the reflector layers;
• forming one or more absorber layers over the dielectric layers;
• and
• incorporating a luminescent material into the flake or foil as a separate layer or as at least part of one or more of the reflector layer, dielectric layer, or absorber layer.