Display device and manufacturing method thereof

Abstract

A display device includes: a substrate; a plurality of pixels on the substrate; an organic encapsulation layer covering a pixel area including at least one pixel; a first inorganic encapsulation layer on the organic encapsulation layer and having a first crack at a pixel area gap; and a second inorganic encapsulation layer on the first inorganic encapsulation layer and filling the first crack.

What is claimed is: 
     
         1 . A display device comprising:
 a substrate;   a plurality of pixels on the substrate;   an organic encapsulation layer covering a pixel area comprising at least one pixel;   a first inorganic encapsulation layer on the organic encapsulation layer and having a first crack at a pixel area gap; and   a second inorganic encapsulation layer on the first inorganic encapsulation layer and filling the first crack.   
     
     
         2 . The display device of  claim 1 , wherein the substrate comprises:
 a stretchable lower substrate, and   a flexible upper substrate on the lower substrate.   
     
     
         3 . The display device of  claim 2 , wherein
 a portion of the lower substrate corresponding to the first crack is elongated more than that of a portion of the lower substrate corresponding to the pixel area.   
     
     
         4 . The display device of  claim 3 , wherein
 the portion of the lower substrate corresponding to the pixel area is elongated to be less than 30% of an elasticity limit of the lower substrate.   
     
     
         5 . The display device of  claim 3 , wherein
 a width of the elongated portion of the lower substrate corresponding to the first crack is greater than twice a thickness of the second inorganic encapsulating layer.   
     
     
         6 . The display device of  claim 2 , wherein
 the lower substrate comprises polydimethylsiloxane and/or polyurethane.   
     
     
         7 . The display device of  claim 6 , wherein
 the upper substrate comprises a polyimide.   
     
     
         8 . The display device of  claim 1 , wherein
 the first crack exposes a lower substrate, and   the second inorganic encapsulation layer contacts the lower substrate.   
     
     
         9 . The display device of  claim 1 , wherein
 the pixel area comprises the plurality of pixels, and   a first gap between neighboring pixels provided in one pixel area is different from a second gap between neighboring pixels provided in a different pixel area.   
     
     
         10 . The display device of  claim 1 , wherein the first crack includes:
 a longitudinal crack formed to be stretched in a first planar direction of the substrate, and   a transversal crack formed to be stretched in a second planar direction of the substrate crossing the first planar direction.   
     
     
         11 . The display device of  claim 1 , wherein
 the second inorganic encapsulation layer has a second crack that is narrower than the first crack, and   the display device further comprises a third inorganic encapsulation layer on the second inorganic encapsulation layer and filling the second crack.   
     
     
         12 . The display device of  claim 11 , wherein
 the second inorganic encapsulation layer covers an edge of the first inorganic encapsulation layer.   
     
     
         13 . The display device of  claim 11 , wherein
 the first crack is formed to be stretchable in a first planar direction of the substrate, and   the second crack is formed to be stretchable in a second planar direction of the substrate crossing the first planar direction.   
     
     
         14 . The display device of  claim 1 , wherein
 the pixel comprises:
 a thin film transistor on the substrate, and 
 an organic light emitting diode coupled to the thin film transistor. 
   
     
     
         15 . A display device comprising:
 a substrate;   a plurality of pixels on the substrate;   an organic encapsulation layer covering a pixel area comprising at least one pixel; and   an inorganic encapsulation layer on the organic encapsulation layer in which a first portion corresponding to the pixel area is thicker than a second portion corresponding to a pixel area gap.   
     
     
         16 . The display device of  claim 15 , wherein
 the substrate comprises:
 a stretchable lower substrate, and 
 a flexible upper substrate on the lower substrate. 
   
     
     
         17 . The display device of  claim 16 , wherein
 the lower substrate corresponding to the second portion is elongated more than that of the lower substrate corresponding to the first portion.   
     
     
         18 . The display device of  claim 16 , wherein
 the second portion of the inorganic encapsulation layer contacts the lower substrate.   
     
     
         19 . The display device of  claim 15 , wherein
 a lower substrate comprises polydimethylsiloxane and/or polyurethane.   
     
     
         20 . A method for manufacturing a display device, the method comprising:
 forming a plurality of pixels on a substrate comprising a stretchable lower substrate and a flexible upper substrate;   forming an organic encapsulation layer covering a pixel area comprising at least one pixel;   forming a first inorganic encapsulation layer on the organic encapsulation layer;   forming a first crack in the first inorganic encapsulation layer by elongating the lower substrate; and   forming a second inorganic encapsulation layer on the first inorganic encapsulation layer to fill the first crack.   
     
     
         21 . The method of  claim 20 , wherein
 the forming of the first crack comprises   elongating a portion of the lower substrate corresponding to the first crack to be less than 30% of an elasticity limit of the lower substrate.   
     
     
         22 . The method of  claim 20 , wherein
 the forming of a first crack comprises   forming the first crack to expose the lower substrate.   
     
     
         23 . The method of  claim 20 , wherein
 the lower substrate comprises polydimethylsiloxane and/or polyurethane, and   the upper substrate comprises a polyimide.