Backlit displays including organic light-emissive material

Abstract

A display device comprising: a light switching unit comprising an array of pixels each operable to vary the transmission of light therethrough; and a backlight comprising a first series of regions of organic light-emissive material having a first emission colour and a second series of regions of organic light-emissive material having a second emission colour, each region of organic material being located so as to lie behind a plurality of pixels of the array in the viewing direction for backlighting those pixels; and at least one of the regions of organic light-emissive material being formed by a process of ink-jet deposition.

1 - 28 . (canceled) 
     
     
         29 . A display device comprising:
 a first electrode;   a small molecule organic light emissive layer deposited over the first electrode, wherein the small molecule organic light emissive layer is a patterned layer which has been deposited by solution processing; and   a second electrode deposited over the organic light emissive layer.   
     
     
         30 . The display device of  claim 29 , wherein the organic light emissive layer has been deposited by a process of ink-jet deposition. 
     
     
         31 . The display device of  claim 29 , wherein the organic light emissive patterned layer comprises regions of red, green and blue light emissive materials. 
     
     
         32 . The display device of  claim 29  including:
 a charge transport layer between the organic light emissive layer and the first electrode; and   the organic light emissive layer is disposed over and in physical contact with the charge transport layer.   
     
     
         33 . The display device of  claim 32 , wherein the charge transport layer comprises one or more polymers. 
     
     
         34 . The display device of  claim 33 , wherein the one or more polymers comprise polystyrene sulphonic acid doped polyethylene dioxythiophene (PDOT:PSS) and/or poly(2,7-(9,9-di-n-octylfluorene)-(1,4-phenylene-(4-imino(benzoic acid))-1,4-phenylene-(4-imino(benzoic acid))-1,4-phenylene))(BFA) and/or polyaniline and/or PPV. 
     
     
         35 . The display device of  claim 32 , wherein the charge transport layer is patterned. 
     
     
         36 . The display device of  claim 35 , wherein the charge transport layer has been deposited by a process of ink-jet deposition.