A display system, comprising: one or more light sources configured to emit first light with a first spectral power distribution; one or more light regeneration layers configured to be stimulated by the first light, wherein the one or more light regeneration layers are further configured to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to one or more primary colors and (b) secondary spectral components that do not correspond to the one or more primary colors; and one or more notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light, wherein the portion of the second light is directed to a viewer of the display system and configured to render images viewable to the viewer, wherein the display system is configured to recycle at least a portion of light, the light comprising one or more of light originated from the one or more light sources, light regenerated by the one or more light regeneration layers, or light reflected by one or more components in the display system; the one or more notch filter layers are disposed in front of the one or more light regeneration layers, closer to the viewer than the one or more light regeneration layers; the display system further comprises: - a first optical stack; - a color filter layer; and - a second optical stack, the first optical stack is disposed in front of the one or more light sources; the one or more light regeneration layers are disposed in front of the first optical stack; the one or more notch filter layers are disposed between the one or more light regeneration layers and the second optical stack; the color filter layer is disposed in front of the second optical stack; pixel structures for modulating a light intensity of transmitted light are embedded in the color filter layer and the second optical stack; the one or more light sources are UV light sources; at least one of the one or more light regeneration layers is configured with blue light regeneration materials; and at least one of the one or more notch filter layers is configured with one or more notches between UV wavelengths and blue light wavelengths. one or more light sources configured to emit first light with a first spectral power distribution; one or more light regeneration layers configured to be stimulated by the first light, wherein the one or more light regeneration layers are further configured to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to one or more primary colors and (b) secondary spectral components that do not correspond to the one or more primary colors; and one or more notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light, wherein the portion of the second light is directed to a viewer of the display system and configured to render images viewable to the viewer, wherein the display system is configured to recycle at least a portion of light, the light comprising one or more of light originated from the one or more light sources, light regenerated by the one or more light regeneration layers, or light reflected by one or more components in the display system; the one or more notch filter layers are disposed in front of the one or more light regeneration layers, closer to the viewer than the one or more light regeneration layers; the display system further comprises: - a first optical stack; - a color filter layer; and - a second optical stack, - a first optical stack; - a color filter layer; and - a second optical stack, the first optical stack is disposed in front of the one or more light sources; the one or more light regeneration layers are disposed in front of the first optical stack; the one or more notch filter layers are disposed between the one or more light regeneration layers and the second optical stack; the color filter layer is disposed in front of the second optical stack; pixel structures for modulating a light intensity of transmitted light are embedded in the color filter layer and the second optical stack; the one or more light sources are UV light sources; at least one of the one or more light regeneration layers is configured with blue light regeneration materials; and at least one of the one or more notch filter layers is configured with one or more notches between UV wavelengths and blue light wavelengths.