Substrate assembly of an oled

Abstract

A method for manufacturing an organic electroluminescent display device (OLED), wherein an arrangement of layers is applied to a substrate such that first conductors extend in a first direction as well as in a second direction, while between intersections of the conductors an organic electroluminescent connection has been provided which, under the influence of an electric tension, emits light. The substrate is manufactured from plastic and is provided with a surface structure which forms a boundary for at least a number of the layers to be applied. Also provided is a substrate intended for use in a method for manufacturing an organic electroluminescent display device, wherein the substrate has been manufactured from plastic and is provided with a surface structure which forms a boundary for at least a number of the layers to be applied. Further provided is an organic electroluminescent display device obtained with the method.

1 . A substrate assembly for use in manufacturing an organic electroluminescent display device, the substrate assembly comprising:
 a substrate of plastic manufactured by one of: injection molding, embossing or photopolymeric replication and having a surface structure forming a boundary for layers that are to be applied on the substrate of the substrate assembly;   the surface structure comprising a number of pixel pits or sub-pixel pits;   wherein, in the pixel pits or sub pixel pits, a surface sub-structure is provided that is configured to achieve one or more of the following:
 changing the direction of the light issuing through the surface sub-structure; 
 diverging light issuing through the surface sub-structure; 
 converging light issuing through the surface sub-structure; 
 distributing liquid that is applied in the pixel pits or sub-pixel pits for forming layers in the pixel pits or substantially-pixel pits; and 
 enlarging the contact surface in the pixel pits or sub-pixel pits relative pixel pits or sub-pixel pits that do not include a surface sub-structure. 
   
     
     
         2 . The substrate assembly according to  claim 1 , wherein the surface sub-structure comprises capillary grooves. 
     
     
         3 . The substrate assembly according to  claim 1 , wherein the surface sub-structure comprises a groove structure that forms a Fresnel lens. 
     
     
         4 . The substrate assembly according to  claim 1 , wherein the surface structure is releasing such that it can be taken from a mold which is provided with a negative image of the surface structure. 
     
     
         5 . The substrate assembly according to  claim 1 , wherein the substrate is an injection molding product. 
     
     
         6 . The substrate assembly according to  claim 1 , including a transparent encapsulation layer that is applied directly on the plastic substrate. 
     
     
         7 . The substrate assembly according to  claim 1 , including a conductive layer that is applied on the substrate and that provides parallel conductors on the substrate. 
     
     
         8 . An organic electroluminescent display device comprising a substrate assembly according to  claim 1 .