Novel illumination devices

Abstract

Illumination device comprising at least one LED and at least one colour converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate, wherein LED and colour converter are present in a remote phosphor arrangement.

1 : An illumination device, comprising at least one LED and at least one colour converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate, wherein the LED and the colour converter are present in a remote phosphor arrangement. 
     
     
         2 : The illumination device of  claim 1 , wherein the at least one organic fluorescent colorant is an organic fluorescent dye. 
     
     
         3 : The illumination device of  claim 1 , Illumination wherein the at least one organic fluorescent colorant is a green- or red- or orange-fluorescing organic fluorescent dye. 
     
     
         4 : The illumination device of  claim 1 , wherein the at least one organic fluorescent colorant is a naphthalene or perylene derivative. 
     
     
         5 : The illumination device of  claim 1 , wherein the at least one organic fluorescent colorant is selected from the group consisting of 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         wherein: 
         R 1  is a linear or branched C 1 -C 18  alkyl radical, a C 4 -C 8  cycloalkyl radical which may be mono- or polysubstituted by halogen or by linear or branched C 1 -C 18  alkyl, or phenyl or naphthyl, where phenyl and naphthyl may be mono- or polysubstituted by halogen or by linear or branched C 1 -C 18  alkyl; 
         X represents substituents in the ortho and/or para position and is linear or branched C 1  to C 18  alkyl; and 
         is a number from 0 to 3. 
       
     
     
         6 : The illumination device of  claim 5 , wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropyl-phenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphe xy)perylene-3,4:9,10-tetracarboxdiimide, 3,9-dicyanoperylene-4,10-bis(sec-butyl carboxylate), 3,10-dicyanoperylene-4,9-bis(sec-butyl carboxylate), 3,9-dicyanoperylene-4,10-bis(isobutyl carboxylate), 3,10-dicyanoperylene-4,9-bis(isobutyl carboxylate), N-(2,6-di(isopropyl)phenyl)perylene-3,4-dicarboxylic monomide and mixtures thereof. 
     
     
         7 : The illumination device according to  claim 6 , wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide and mixtures thereof. 
     
     
         8 : A color converter, comprising at least one organic fluorescent dye in a matrix consisting essentially of polystyrene or polycarbonate, wherein the at least one organic fluorescent dye is selected from the group consisting of 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         wherein: 
         R 1  is a linear or branched C 1 -C 18  alkyl radical, a C 4 -C 8  cycloalkyl radical which may be mono- or polysubstituted by halogen or by linear or branched C 1 -C 18  alkyl, or phenyl or naphthyl, where phenyl and naphthyl may be mono- or polysubstituted by halogen or by linear or branched C 1 -C 18  alkyl; 
         X represents substituents in the ortho and/or para position and is linear or branched C 1  to C 18  alkyl; and 
         y is a number from 0 to 3. 
       
     
     
         9 : The color converter according to  claim 8 , wherein the at least one organic fluorescent dye is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropyl-phenoxy)perylene-3,4:9,10-tetracarboxdiimide, 3,9-dicyanoperylene-4,10-bis(sec-butyl carboxylate), 3,10-dicyanoperylene-4,9-bis(sec-butyl carboxylate), 3,9-dicyanoperylene-4,10-bis isobutyl carboxylate), 3,10-dicyanoperylene-4,9-bis(isobutyl carboxylate), N-(2,6)-di(isopropyl)phenyl)perylene-3,4-dicarboxylic monoimide and mixtures thereof. 
     
     
         10 : The color converter according to  claim 9 , wherein the at least one organic fluorescent dye is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropyl-phenoxy)perylene-3,4:9,10-tetracarboxdiimide and mixture thereof. 
     
     
         11 : The color converter according to  claim 8 , wherein the at least one organic fluorescent colorant is dissolved in the matrix. 
     
     
         12 : The color converter of  claim 8 , further comprising at least one inorganic white pigment as a scattering body. 
     
     
         13 : The color converter of  claim 8 , which is a film, a plaque or a sheet. 
     
     
         14 : A process for producing the color converter of  claim 8 , the process comprising dissolving the at least one organic fluorescent colorant in an organic solvent together with the matrix material and optionally scattering particles, and processing a resulting mixture into a film by removing the solvent. 
     
     
         15 : The process of  claim 14 , further comprising extruding and/or injection-molding the matrix with the at least one organic fluorescent colorant. 
     
     
         16 : A process, comprising converting light produced by LEDs with at least one color converter according to  claim 8 . 
     
     
         17 : A remote phosphor structure, comprising the color converter of  claim 8  and at least one LED.