Electroluminescent display and display device

Abstract

The present invention discloses an electroluminescent display and a display device, the electroluminescent display comprising a base substrate and a plurality of pixel units arranged in arrays on the base substrate. Each pixel unit is composed of at least four subpixel units, and each pixel unit comprises at least three luminescent material layers. Each luminescent material layer at least covers two adjacent subpixel units, and only one luminescent material layer in each subpixel unit emits light. Since each luminescent material layer at least covers two adjacent subpixel units, when a luminescent material is evaporated and coated by an evaporation coating process, the subpixel units can be made smaller with the size of the mask plate unchanged, which is helpful for improving the resolution of the display.

1 - 10 . (canceled) 
     
     
         11 . An electroluminescent display comprising a base substrate and a plurality of pixel units arranged in arrays on the base substrate, each of the pixel units being composed of at least four subpixel units, and each of the pixel units comprising at least three luminescent material layers,
 wherein each of the luminescent material layers at least covers two adjacent subpixel units, and only one of the luminescent material layers in each of the subpixel units emits light.   
     
     
         12 . The electroluminescent display according to  claim 11 , wherein each of the luminescent material layers in a same one of the pixel units is made of a different material, and
 each of the subpixel units in a same one of the pixel units emits light of a different color.   
     
     
         13 . The electroluminescent display according to  claim 11 , wherein each of the subpixel units comprises a first electrode, at least one luminescent material layer, and a second electrode arranged on the base substrate sequentially, and
 the first electrode comprises a reflective layer arranged on the base substrate and a transparent electrode located over the reflective layer.   
     
     
         14 . The electroluminescent display according to  claim 13 , wherein in a same one of the pixel units, at least one of the subpixel units has a micro cavity length different from that of another one of the subpixel units, the micro cavity length being a length from a side of the reflective layer away from the base substrate to a side of the second electrode away from the base substrate. 
     
     
         15 . The electroluminescent display according to  claim 14 , wherein in a same one of the pixel units, each of the subpixel units has a different micro cavity length. 
     
     
         16 . The electroluminescent display according to  claim 15 , wherein in a same one of the pixel units, the transparent electrode corresponding to each of the subpixel units has a different thickness. 
     
     
         17 . The electroluminescent display according to  claim 11 , wherein each of the pixel units is composed of four subpixel units, and
 each of the pixel units comprises a first luminescent material layer covering a second subpixel unit and a third subpixel unit, a second luminescent material layer covering a first subpixel unit and a second subpixel unit, and a third luminescent material layer covering a third subpixel unit and a fourth subpixel unit, wherein in the second subpixel unit and the third subpixel unit, only the first luminescent material layer emits light.   
     
     
         18 . The electroluminescent display according to  claim 17 , wherein each of the luminescent material layers in a same one of the pixel units is made of a different material, and
 each of the subpixel units in a same one of the pixel units emits light of a different color.   
     
     
         19 . The electroluminescent display according to  claim 17 , wherein each of the subpixel units comprises a first electrode, at least one luminescent material layer, and a second electrode arranged on the base substrate sequentially, and
 the first electrode comprises a reflective layer arranged on the base substrate and a transparent electrode located over the reflective layer.   
     
     
         20 . The electroluminescent display according to  claim 19 , wherein in a same one of the pixel units, at least one of the subpixel units has a micro cavity length different from that of another one of the subpixel units, the micro cavity length being a length from a side of the reflective layer away from the base substrate to a side of the second electrode away from the base substrate. 
     
     
         21 . The electroluminescent display according to  claim 20 , wherein in a same one of the pixel units, each of the subpixel units has a different micro cavity length. 
     
     
         22 . The electroluminescent display according to  claim 21 , wherein in a same one of the pixel units, the transparent electrode corresponding to each of the subpixel units has a different thickness. 
     
     
         23 . The electroluminescent display according to  claim 17 , wherein both the second luminescent material layer and the third luminescent material layer are located above or below the first luminescent material layer, and
 a carrier or exciton blocking layer is arranged therebetween in a portion where the second luminescent material layer and the third luminescent material layer overlap the first luminescent material layer.   
     
     
         24 . The electroluminescent display according to  claim 11 , wherein each of the pixel units further comprises a hole transport layer arranged between the first electrode and the luminescent material layer, and/or an electron transport layer arranged between the second electrode and the luminescent material layer. 
     
     
         25 . The electroluminescent display according to  claim 24 , wherein each of the luminescent material layers in a same one of the pixel units is made of a different material, and
 each of the subpixel units in a same one of the pixel units emits light of a different color.   
     
     
         26 . The electroluminescent display according to  claim 24 , wherein each of the subpixel units comprises a first electrode, at least one luminescent material layer, and a second electrode arranged on the base substrate sequentially, and
 the first electrode comprises a reflective layer arranged on the base substrate and a transparent electrode located over the reflective layer.   
     
     
         27 . A display device, comprising the electroluminescent display according to  claim 11 . 
     
     
         28 . The display device according to  claim 27 , wherein each of the luminescent material layers in a same one of the pixel units is made of a different material, and
 each of the subpixel units in a same one of the pixel units emits light of a different color.   
     
     
         29 . The display device according to  claim 27 , wherein each of the subpixel units comprises a first electrode, at least one luminescent material layer, and a second electrode arranged on the base substrate sequentially, and
 the first electrode comprises a reflective layer arranged on the base substrate and a transparent electrode located over the reflective layer.   
     
     
         30 . The display device according to  claim 29 , wherein in a same one of the pixel units, at least one of the subpixel units has a micro cavity length different from that of another one of the subpixel units, the micro cavity length being a length from a side of the reflective layer away from the base substrate to a side of the second electrode away from the base substrate.