1. An electroluminescent display comprising: a substrate having a plurality of pixel regions, each of the pixel regions including a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region; and a plurality of first color light-emitting layers, a plurality of second color light-emitting layers, and a plurality of third color light-emitting layers disposed on the substrate, each of the first color light-emitting layers being positioned in each of the first sub-pixel regions respectively, and each of the second color light-emitting layers being positioned in two adjacent second sub-pixel regions, and two adjacent second sub-pixel regions of two different pixel regions being contained within one continuous second color light-emitting layer, wherein an area of the first sub-pixel region is larger than an area of the second sub-pixel region in the single pixel region, and wherein each of the first color light-emitting layers comprises a blue light-emitting layer; wherein each of the first sub-pixel region comprises a first driving transistor and a first switching transistor, each of the second sub-pixel region comprises a second driving transistor and a second switching transistor, and each of the third sub-pixel region comprises a third driving transistor and a third switching transistor, wherein the first sub-pixel regions, the second sub-pixel regions, and the third sub-pixel regions are arranged as an array that comprises a plurality of rows, each of the odd rows of the array is an alternation of one first sub-pixel region and two second sub-pixel regions, and each of the even rows of the array is an alternation of two third sub-pixel regions and one first sub-pixel regions, and wherein the first sub-pixel regions are not positioned adjacent to each other and are separated by two second sub-pixel regions or two third sub-pixel regions.