Method for creating a display device

Abstract

The present invention concerns a multicolor display device, comprising a transparent substrate, fluorescent dye deposited in a dye layer onto the substrate by ink jet printing, and a source of radiation for illuminating said fluorescent dye. The present invention also concerns methods for creating such a device.

1 . A display, comprising: 
 a transparent substrate;    fluorescent dye-containing material deposited in a dye layer onto said substrate by ink jet printing; and    a source of radiation for illuminating said fluorescent dye.    
     
     
         2 . The display of    claim 1   , wherein 
 said substrate has a front side and a rear side, said substrate being transparent to ultraviolet radiation;    said fluorescent dye-containing material is provided on the front side of the substrate; and    said source is positioned to illuminate the rear side of the substrate.    
     
     
         3 . The display of    claim 1   , wherein said substrate is transparent to visible radiation and said fluorescent dye-containing material is deposited onto said substrate in a pattern forming a plurality of light emitting regions, at least a portion of said light emitting regions comprising one or more fluorescent dyes selected from a red fluorescent dye, a green fluorescent dye and a blue fluorescent dye, said display further comprising: 
 a transparent, conductive layer covering said light emitting regions;    an organic blue light emitting device covering said transparent, conductive layer; and    an electrical contact in contact with said organic blue light emitting device.    
     
     
         4 . The display of    claim 3   , wherein said light emitting regions comprise red, green and blue light emitting regions arranged in a predetermined configuration.  
     
     
         5 . The display of    claim 4   , wherein said red, green and blue light emitting regions are arranged in pixels, each pixel comprising one red light emitting region, one green light emitting region and one blue light emitting region, and wherein said electrical contact contacts said organic blue light emitting device in each of said red, green and blue light emitting regions.  
     
     
         6 . The display of    claim 4   , 
 wherein each of said red light emitting regions comprises a red fluorescent dye region and each of said green light emitting regions comprises a green fluorescent dye region; and    wherein said organic blue light emitting device directly emits blue light in each of the blue light emitting regions, and said organic blue light stimulates the fluorescent dye in each of the red and green light emitting regions.    
     
     
         7 . The display of    claim 3   , wherein said transparent, conductive layer comprises inalum-tin oxide.  
     
     
         8 . The display of    claim 1   , wherein said fluorescent dye-containing material comprises one or more fluorescent dyes and a matrix material.  
     
     
         9 . The display of    claim 8   , wherein said dye is present in an amount ranging from about 0.1 to about 6 wt % relative to said matrix material.  
     
     
         10 . The display of    claim 8   , wherein said matrix material is selected from polymethylmethacrylate, polyvinylcarbazole, polybutadiene, polyesters and N,N′-diphenyl-N,N′bis(3-methylphenyl)-1,1′biphenyl-4,4′-diamine.  
     
     
         11 . The display of    claim 1   , wherein said substrate is selected from glass and polyester.  
     
     
         12 . A method for creating a display, comprising the steps of: 
 providing a transparent substrate;    depositing an ink comprising a fluorescent dye onto said substrate, said depositing occurring by ink jet printing; and    providing a source of ultraviolet or blue light radiation.    
     
     
         13 . The method of    claim 12    wherein 
 said substrate has a front side and a rear side, said substrate being transparent to ultraviolet radiation;  
 said fluorescent dye is deposited onto the front side of the substrate; and  
 said source is positioned to expose the rear side of the substrate to said radiation.  
 
     
     
         14 . The method of    claim 12   , wherein said substrate is transparent to visible radiation, and wherein said fluorescent dye is deposited onto said substrate in a pattern forming a plurality of light emitting regions, at least a portion of said light emitting regions comprising one or more fluorescent dyes selected from a red fluorescent dye, a green fluorescent dye and a blue fluorescent dye, said method further comprising: 
 forming a transparent, conductive layer covering said light emitting regions;    forming an organic blue light emitting device covering said transparent, conductive layer; and    forming an electrical contact in contact with said organic blue light emitting device.    
     
     
         15 . The method of    claim 14   , wherein said light emitting regions comprise red, green and blue light emitting regions arranged in a predetermined configuration.  
     
     
         16 . The method of    claim 15   , wherein said red, green and blue light emitting regions are arranged in pixels, each pixel comprising one red light emitting region, one green light emitting region and one blue light emitting region, and wherein said electrical contact contacts said organic blue light emitting device in each of said red, green and blue light emitting regions.  
     
     
         17 . The method of    claim 15    wherein each of said red light emitting regions comprises a red fluorescent dye region and each of said green light emitting regions comprises a green fluorescent dye region; and wherein said organic blue light emitting device directly emits blue light in each of the blue light emitting regions, and said organic blue light stimulates the fluorescent dye in each of the red and green light emitting regions.  
     
     
         18 . The method of    claim 12   , wherein said ink comprises one or more fluorescent dyes, a matrix material and a liquid carrier medium.  
     
     
         19 . The method of    claim 18   , wherein said ink comprises from about 2 to about 7 wt % matrix material.  
     
     
         20 . The method of    claim 18   , wherein said dye is present in an amount ranging from about 0.1 to about 6 wt % relative to said matrix material.  
     
     
         21 . The method of    claim 18   , wherein the matrix material is selected from polymethylmethacrylate, polyvinylcarbazole, polybutadiene, polyesters and N,N′-diphenyl-N,N′bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine.  
     
     
         22 . The method of    claim 12   , wherein said substrate is selected from glass and polyester.  
     
     
         23 . A computer incoporating the display of    claim 1   .  
     
     
         24 . A television incoporating the display of    claim 1   .  
     
     
         25 . A large area wall, theater or stadium screen incoporating the display of    claim 1   .  
     
     
         26 . A billboard or sign incoporating the display of    claim 1   .  
     
     
         27 . A vehicle incorporating the display of    claim 1   .  
     
     
         28 . A printer incoporating the display of    claim 1   .  
     
     
         29 . A telecommunications device incorporating the display of    claim 1   .  
     
     
         30 . A telephone incorporating the display of    claim 1   .