Display device with illuminable functional elements, comprising: at least one functional layer, at least one rear support layer, and at least one light barrier element, wherein the functional layer is next to the rear support layer, wherein an upper surface of the rear support layer is opposite to a lower surface of the rear support layer and contacts a lower surface of the functional layer, wherein the functional layer comprises at least two functional elements (28a, 28b), that are light-transmissive for visible light and are illuminable by at least one light source, wherein the rear support layer is light-transmissive for visible light, wherein the rear support layer comprises at least one light barrier element, wherein the light barrier element extends essentially vertically from the lower surface of the rear support layer into the rear support layer and is arranged between of at least two superposed functional elements (28a, 28b) of the superposed functional layer, wherein the light barrier element arranged in the rear support layer at least partly surrounds spaced apart at least one superposed functional element, and wherein the light barrier element is adapted for reducing or preventing light scattering through the light barrier element, characterized in that the light barrier element comprises a dye and is formed in the rear support layer, such that the dye is molecularly solved in the material of the rear support layer. at least one functional layer, at least one rear support layer, and at least one light barrier element, wherein the functional layer is next to the rear support layer, wherein an upper surface of the rear support layer is opposite to a lower surface of the rear support layer and contacts a lower surface of the functional layer, wherein the functional layer comprises at least two functional elements (28a, 28b), that are light-transmissive for visible light and are illuminable by at least one light source, wherein the rear support layer is light-transmissive for visible light, wherein the rear support layer comprises at least one light barrier element, wherein the light barrier element extends essentially vertically from the lower surface of the rear support layer into the rear support layer and is arranged between of at least two superposed functional elements (28a, 28b) of the superposed functional layer, wherein the light barrier element arranged in the rear support layer at least partly surrounds spaced apart at least one superposed functional element, and wherein the light barrier element is adapted for reducing or preventing light scattering through the light barrier element, characterized in that the light barrier element comprises a dye and is formed in the rear support layer, such that the dye is molecularly solved in the material of the rear support layer. wherein the functional layer is next to the rear support layer, wherein an upper surface of the rear support layer is opposite to a lower surface of the rear support layer and contacts a lower surface of the functional layer, wherein the functional layer comprises at least two functional elements (28a, 28b), that are light-transmissive for visible light and are illuminable by at least one light source, wherein the rear support layer is light-transmissive for visible light, wherein the rear support layer comprises at least one light barrier element, wherein the light barrier element extends essentially vertically from the lower surface of the rear support layer into the rear support layer and is arranged between of at least two superposed functional elements (28a, 28b) of the superposed functional layer, wherein the light barrier element arranged in the rear support layer at least partly surrounds spaced apart at least one superposed functional element, and wherein the light barrier element is adapted for reducing or preventing light scattering through the light barrier element, characterized in that the light barrier element comprises a dye and is formed in the rear support layer, such that the dye is molecularly solved in the material of the rear support layer.