Luminous systems

1. A luminous system, said luminous system comprising:

one or more illumination sources that output, when powered, a primary electromagnetic radiation through one or more exit regions;

a multilayer structure, said multilayer structure comprising:

one or more energy conversion layers that convert at least a portion of incident radiation to a secondary electromagnetic radiation that is at least partially emitted to a viewing hemisphere, the incident radiation being at least one of said primary electromagnetic radiation or ambient electromagnetic radiation;

and

one or more diffuse reflection layers configured to transmit the secondary electromagnetic radiation toward the viewing hemisphere without substantially absorbing the secondary electromagnetic radiation, said one or more diffuse reflection layers further being configured to redirect at least a portion of ambient electromagnetic radiation to the viewing hemisphere and attenuate the amount of ambient electromagnetic radiation that is converted by the one or more energy conversion layers such that the amount of ambient electromagnetic radiation that is redirected to the viewing hemisphere by the one or more diffuse reflection layers is greater than the amount of ambient electromagnetic radiation that is converted by the one or more energy conversion layers, said one or more diffuse reflection layers being optically decoupled from said multilayer structure,

wherein said luminous system is configured to produce a first observed visible color when said one or more illumination sources are powered, said first observed visible color comprising primarily of the secondary electromagnetic radiation that is transmitted toward the viewing hemisphere by the one or more diffuse reflection layers, and

wherein said luminous system is configured to produce a second observed visible color when said one or more illumination sources are non-powered, said second observed visible color comprising primarily of the ambient electromagnetic radiation that is redirected to the viewing hemisphere by the one or more diffuse reflection layers.

2. The luminous system of claim 1 , wherein said first observed visible color and said second observed visible color are substantially similar.

3. The luminous system of claim 1 , wherein said one or more illumination sources comprise one or more light emitting elements.

4. The luminous system of claim 3 , wherein said one or more illumination sources further comprise one or more optical elements that receive and propagate at least a portion of said primary electromagnetic radiation emitted from said one or more light emitting elements and substantially transmit said primary electromagnetic radiation through said one or more exit regions to said multilayer structure.

5. The luminous system of claim 4 , wherein said one or more optical elements comprise one or more light guides having a surface with one or more extraction regions.

6. The luminous system of claim 5 , wherein said one or more extraction regions of the surface of said one or more light guides are remote to said one or more light emitting elements.

7. The luminous system of claim 1 , wherein said one or more illumination sources further comprise a reflection layer that redirects at least a portion of said primary electromagnetic radiation to the viewing hemisphere.

8. The luminous system of claim 1 , wherein said multilayer structure is optically coupled to said one or more illumination sources.

9. The luminous system of claim 1 , wherein said multilayer structure is optically decoupled from said one or more illumination sources.

10. The luminous system of claim 1 , wherein said multilayer structure further comprises one or more diffusion layers that substantially increase optical scattering of at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation, said secondary electromagnetic radiation, or ambient electromagnetic radiation, and wherein said one or more diffusion layers are disposed between the one or more energy conversion layers and the one or more diffuse reflection layers.

11. The luminous system of claim 1 , wherein said one or more energy conversion layers further comprise one or more light scattering materials that disperse at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation or said secondary electromagnetic radiation.

12. The luminous system of claim 1 , wherein said multilayer structure further comprises a reflection layer that redirects at least a portion of said secondary electromagnetic radiation to the viewing hemisphere, said reflection layer being substantially transmissive of said primary electromagnetic radiation.

13. The luminous system of claim 12 , wherein said multilayer structure further comprises one or more diffusion layers that substantially increase optical scattering of at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation, said secondary electromagnetic radiation, or ambient electromagnetic radiation, and wherein said one or more energy conversion layers are disposed between the reflection layer and the one or more diffusion layers.

14. The luminous system of claim 1 , wherein said multilayer structure further comprises one or more stability enhancement layers that increase photolytic and thermal stability of said multilayer structure.

15. The luminous system of claim 1 , wherein said multilayer structure further comprises a protection layer that provides physical and chemical durability for said multilayer structure.

16. A method for fabricating a luminous system, said method comprising:

providing one or more illumination sources that output, when powered, a primary electromagnetic radiation through one or more exit regions;

applying a multilayer structure over at least a portion of at least one of said one or more exit regions, said multilayer structure comprising:

one or more energy conversion layers that convert at least a portion of incident radiation to a secondary electromagnetic radiation that is at least partially emitted to a viewing hemisphere, the incident radiation being at least one of said primary electromagnetic radiation or ambient electromagnetic radiation;

and

overlaying one or more diffuse reflection layers over a surface of said multilayer structure, said one or more diffuse reflection layers being configured to transmit the secondary electromagnetic radiation toward the viewing hemisphere without substantially absorbing the secondary electromagnetic radiation, reflect at least a portion of ambient electromagnetic radiation to the viewing hemisphere, and attenuate the amount of ambient electromagnetic radiation that is converted by the one or more energy conversion layers such that the amount of ambient electromagnetic radiation that is reflected to the viewing hemisphere by the one or more diffuse reflection layers is greater than the amount of ambient electromagnetic radiation that is converted by the one or more energy conversion layers, wherein said one or more diffuse reflection layers being optically decoupled from said multilayer structure,

wherein said luminous system is configured to produce a first observed visible color when said one or more illumination sources are powered, said first observed visible color comprising primarily of the secondary electromagnetic radiation that is transmitted toward the viewing hemisphere by the one or more diffuse reflection layers, and

wherein said luminous system is configured to produce a second observed visible color when said one or more illumination sources are non-powered, said second observed visible color comprising primarily of the ambient electromagnetic radiation that is reflected to the viewing hemisphere by the one or more diffuse reflection layers.

17. The method of claim 16 , wherein said first observed visible color and said second observed visible color are substantially similar.

18. The method of claim 16 , wherein said multilayer structure is optically coupled to said one or more illumination sources.

19. The method of claim 16 , wherein said multilayer structure is optically decoupled from said one or more illumination sources.

20. The method of claim 16 , wherein said one or more illumination sources comprise one or more light emitting elements.

21. The method of claim 20 , wherein said one or more illumination sources further comprise a reflection layer disposed onto a surface of said one or more light emitting elements to redirect at least a portion of said primary electromagnetic radiation to the viewing hemisphere.

22. The method of claim 20 , wherein said one or more illumination sources further comprise one or more optical elements that receive and propagate at least a portion of said primary electromagnetic radiation emitted from said one or more light emitting elements and substantially transmit said primary electromagnetic radiation through said one or more exit regions to said multilayer structure.

23. The method of claim 22 , wherein said one or more optical elements comprise one or more light guides having a surface with one or more extraction regions.

24. The method of claim 22 , wherein said one or more illumination sources comprise a reflection layer disposed onto a surface of said one or more optical elements to redirect at least a portion of said primary electromagnetic radiation to the viewing hemisphere.

25. The method of claim 16 , wherein said one or more energy conversion layers further comprise one or more light scattering materials that disperse at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation or said secondary electromagnetic radiation.

26. The method of claim 16 , wherein said multilayer structure further comprises a reflection layer disposed onto a surface of said one or more energy conversion layers to redirect at least a portion of said secondary electromagnetic radiation to the viewing hemisphere, said reflection layer being substantially transmissive of said primary electromagnetic radiation.

27. The method of claim 26 , wherein said multilayer structure further comprises one or more diffusion layers that substantially increase optical scattering of at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation, said secondary electromagnetic radiation, or ambient electromagnetic radiation, and wherein said one or more energy conversion layers are disposed between the reflection layer and the one or more diffusion layers.

28. The method of claim 16 , wherein said multilayer structure further comprises one or more stability enhancement layers disposed onto at least a surface of said one or more energy conversion layers to increase photolytic and thermal stability of said multilayer structure.

29. The method of claim 16 , wherein said multilayer structure further comprises a protection layer disposed onto a surface of said one or more energy conversion layers to provide physical and chemical durability for said multilayer structure.

30. The method of claim 16 , wherein said multilayer structure further comprises one or more diffusion layers that substantially increase optical scattering of at least a portion of radiation, the radiation being at least one of said primary electromagnetic radiation, said secondary electromagnetic radiation, or ambient electromagnetic radiation, wherein said one or more diffusion layers are disposed between the one or more energy conversion layers and the one or more diffuse reflection layers.