Abstract: A guest-host liquid crystal dye mixture comprising a calamatic, thermotropic liquid crystal as host and a dichroic fluorescent dye as guest, characterized in that the dichroic fluorescent dye is a multichromophoric dye containing at least a group with the general formula Ry-X1—C1, wherein Ry is a chromophore from the rylene family, C1 is a second chromophore and X1 is a spacer that interrupts the conjugation between Ry and C1, the spacer X1 is selected such that it introduces rigidity against bending or folding over an axis perpendicular to the length of the molecule.

Abstract: A controllable glazing, containing at least a first and a second reflective polarizer and a liquid-crystal-dye layer. The liquid-crystal-dye-layer is arranged between the first and the second reflective polarizer. The alignment of the dichroic dye and the alignment of the liquid crystal of the liquid-crystal-dye-layer are changeable. The first and the second reflective polarizer are denoted for electromagnetic radiation in the wavelength range of ?1 to ?2 and the liquid-crystal-dye-layer is selected such that the electromagnetic radiation transmission through the controllable glazing is controlled in the wavelength range of ?3 to ?4 by dye-absorbance and in the wavelength range ?1 to ?2 by alignment of the liquid crystal and the dye in the liquid-crystal-dye layer. The wavelength range of ?1 to ?2 is within the wavelength range of 750 nm to 2000 nm and the wavelength range of ?3 to ?4 is within the wavelength range of 380 nm to 750 nm.

Abstract: The invention provides a luminescent optical device (10) having an optical waveguide (200). The luminescent optical device (10) further has a photo-luminescent structure (100) on or inside the optical waveguide (200). The photo-luminescent structure (100) comprises a plurality of photo-luminescent domains (110) containing photo-luminescent material (120). The photo-luminescent material (120) is capable of emitting emission light upon excitation by excitation light. The photo-luminescent domains (110) are arranged to emit, upon excitation by excitation light, at least part of the emission light into the optical waveguide layer (200). The luminescent optical device (10) further may comprise a lens structure (300) on the optical waveguide (200).

Abstract: A guest-host liquid crystal dye mixture comprising a calamatic, thermotropic liquid crystal as host and a dichroic fluorescent dye as guest, characterized in that the dichroic fluorescent dye is a multichromophoric dye containing at least a group with the general formula Ry-X1—C1, wherein Ry is a chromophore from the rylene family, C1 is a second chromophore and X1 is a spacer that interrupts the conjugation between Ry and C1, the spacer X1 is selected such that it introduces rigidity against bending or folding over an axis perpendicular to the length of the molecule.

Abstract: A controllable glazing, containing at least a first and a second reflective polarizer and a liquid-crystal-dye layer. The liquid-crystal-dye-layer is arranged between the first and the second reflective polarizer. The alignment of the dichroic dye and the alignment of the liquid crystal of the liquid-crystal-dye-layer are changeable. The first and the second reflective polarizer are denoted for electromagnetic radiation in the wavelength range of ?1 to ?2 and the liquid-crystal-dye-layer is selected such that the electromagnetic radiation transmission through the controllable glazing is controlled in the wavelength range of ?3 to ?4 by dye-absorbance and in the wavelength range ?1 to ?2 by alignment of the liquid crystal and the dye in the liquid-crystal-dye layer. The wavelength range of ?1 to ?2 is within the wavelength range of 750 nm to 2000 nm and the wavelength range of ?3 to ?4 is within the wavelength range of 380 nm to 750 nm.