Display substrate, display panel, display device, and method for manufacturing display substrate

Abstract

A display region includes: a first display region including a first thin film encapsulation structure; a second display region including a second thin film encapsulation structure; and a transition display region including a third thin film encapsulation structure. The first thin film encapsulation structure includes a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer. The second thin film encapsulation structure includes the first organic encapsulation layer, the second inorganic encapsulation layer and a second organic encapsulation layer. The third thin film encapsulation structure includes a first portion and a second portion. The first portion includes the first inorganic encapsulation layer, the first organic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer. The second portion includes the first inorganic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer.

1 . A display substrate, comprising a display region, wherein the display region comprises:
 a first display region comprising a plurality of display units arranged on a substrate and a first thin film encapsulation structure arranged at a light-emitting side of the plurality of display units;   a second display region comprising a plurality of display units arranged on the substrate and a second thin film encapsulation structure arranged at a light-emitting side of the plurality of display units; and   a transition display region comprising a plurality of display units arranged on the substrate and a third thin film encapsulation structure arranged at a light-emitting side of the plurality of display units, the transition display region being located between the first display region and the second display region,   wherein the first thin film encapsulation structure comprises a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units;   the second thin film encapsulation structure comprises the first inorganic encapsulation layer, the second inorganic encapsulation layer and a second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units; and   the third thin film encapsulation structure comprises a first portion arranged at a side adjacent to the first display region and a second portion arranged at a side adjacent to the second display region, the first portion comprises the first inorganic encapsulation layer, the first organic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units, and the second portion comprises the first inorganic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units.   
     
     
         2 . The display substrate according to  claim 1 , wherein the second organic encapsulation layer has a light transmittance greater than the first organic encapsulation layer. 
     
     
         3 . The display substrate according to  claim 1 , wherein the display region comprises a plurality of sides, adjacent sides in the plurality of sides cross to define a plurality of corner portions, and the second display region is located at at least one of the plurality of corner portions. 
     
     
         4 . The display substrate according to  claim 1 , wherein a first barrier is arranged between the first display region and the transition display region, and a second barrier is arranged between the second display region and the transition display region. 
     
     
         5 . The display substrate according to  claim 1 , wherein a first barrier and a second barrier are arranged at the transition display region, orthogonal projections of the first barrier and the second barrier onto the substrate do not coincide with an orthogonal projection of each display unit at the transition display region onto the substrate, the first barrier is arranged at a side of the transition display region adjacent to the first display region, and the second barrier is arranged at a side of the transition display region adjacent to the second display region. 
     
     
         6 . The display substrate according to  claim 4 , wherein the first inorganic encapsulation layer, the first organic encapsulation layer and the second inorganic encapsulation layer of the first portion are formed by extending the first thin film encapsulation structure to a side where the transition display region is located, the first inorganic encapsulation layer, the first organic encapsulation layer and the second inorganic encapsulation layer of the first portion cover the first barrier,
 the second portion is formed by extending the second thin film encapsulation structure to a side where the transition display region is located and covers the second barrier, and   the second organic encapsulation layer of the first portion is formed by extending the second organic encapsulation layer of the second portion to a side where the transition display region is located.   
     
     
         7 . The display substrate according to  claim 4 , wherein the first organic encapsulation layer of the first portion is provided with a slope surface at a side adjacent to the second display region, and the second organic encapsulation layer of the first portion covers a side of the slope surface away from the substrate,
 wherein the second organic encapsulation layer of the second thin film encapsulation structure is substantially flush with a surface of the second organic encapsulation layer of the third thin film encapsulation structure away from the substrate.   
     
     
         8 . (canceled) 
     
     
         9 . The display substrate according to  claim 1 , wherein the first display region has a first pixel density, the second display region has a second pixel density, the transition display region has a third pixel density, and each of the second pixel density and the third pixel density is smaller than or equal to the first pixel density. 
     
     
         10 . The display substrate according to  claim 4 , wherein the second display region comprises:
 a stretchable substrate, a plurality of opening patterns being distributed on a surface of the stretchable substrate, each opening pattern in the plurality of opening patterns comprising a plurality of first openings, a plurality of bridge regions being formed between at least a part of adjacent first openings in the plurality of first openings in such a manner as to surround an island region, the plurality of second display units being arranged on the island regions formed by the opening patterns; and   a plurality of wiring units coupled between the display units on the island region and arranged at the plurality of bridge region respectively.   
     
     
         11 . The display substrate according to  claim 10 , wherein at least one of the plurality of display units comprises:
 a first planarization layer arranged at a front side of the substrate along a light-emitting direction of the display substrate;   an organic insulation layer arranged at a side of the first planarization layer away from the substrate; and   a first electrode layer arranged at a side of the first planarization layer away from the substrate,   wherein the first barrier comprises a first groove, the first groove is formed in the first planarization layer and the organic insulation layer covers the first groove in a shape-following manner, or the first groove is formed in the organic insulation layer;   the second barrier comprises a second groove, the second groove is formed in the first planarization layer and the organic insulation layer covers the second groove in a shape-following manner, or the second groove is formed in the organic insulation layer;   the first inorganic encapsulation layer is arranged at a side of the first electrode layer away from the substrate and covers the first electrode layer;   the first organic encapsulation layer covers a part of the first inorganic encapsulation layer at a side of the first groove away from the second groove, a part of the first inorganic encapsulation layer at the first groove, and a part of the first inorganic encapsulation layer between the first groove and the second groove and adjacent to the first groove, and does not cover a part of the first inorganic encapsulation layer between the first groove and the second groove and adjacent to the second groove, a part of the first inorganic encapsulation layer at the second groove, and a part of the first inorganic encapsulation layer at a side of the second groove away from the first groove;   the second inorganic encapsulation layer covers the first organic encapsulation layer and a part of the first inorganic encapsulation layer not covered by the first organic encapsulation layer; and   the second organic encapsulation layer covers a part of the second inorganic encapsulation layer at the first groove and a part of the second inorganic encapsulation layer at a side of the first groove away from the first display region, and does not over the first openings.   
     
     
         12 . The display substrate according to  claim 11 , wherein the organic insulation layer comprises a first post spacer arranged at the first display region, a second post spacer arranged at the transition display region, and a third post spacer arranged at the second display region, the first groove is formed in the first post spacer, and the second groove is formed in the second post spacer. 
     
     
         13 . The display substrate according to  claim 11 , wherein each of the first groove and the second groove comprises a continuous groove extending in a first direction, and the first direction is an extension direction of a boundary between the first display region and the transition display region. 
     
     
         14 . The display substrate according to  claim 13 , wherein the continuous groove has a groove width of about 5 μm to 15 μm in a second direction and a groove height of about 1 μm to 2.5 μm in a third direction, the second direction is perpendicular to the first direction and parallel to the stretchable substrate, and the third direction is perpendicular to the stretchable substrate. 
     
     
         15 . The display substrate according to  claim 13 , wherein the first groove and/or the second groove comprise a least one column of discrete grooves arranged sequentially in a second direction, the second direction is perpendicular to the first direction and parallel to the stretchable substrate, and each column of discrete grooves comprises a plurality of discrete grooves spaced apart from each other in the first direction,
 wherein the at least one column of discrete grooves comprises a plurality of columns of discrete grooves, and adjacent columns of discrete grooves are spaced apart from each other by about 2 μm to 15 μm.   
     
     
         16 . (canceled) 
     
     
         17 . The display substrate according to  claim 12 , wherein at least one of the plurality of display units further comprises:
 a first isolation structure arranged between the second groove and the first opening and configured to separate the first electrode layer at both sides of the first isolation structure,   wherein the first electrode layer covers the first isolation structure, and is arranged at a side of the first isolation structure adjacent to the second groove and a side of the first isolation structure adjacent to the first opening.   
     
     
         18 . The display substrate according to  claim 17 , wherein at least one of the plurality of display units at the second display region further comprises:
 a first passivation layer, a part of the first passivation layer is arranged between the third post spacer at the second display region and the first opening, and at least a part of the first passivation layer is arranged at a side of the first planarization layer away from the stretchable substrate,   wherein the first isolation structure comprises at least one third groove arranged between the first passivation layer and the first planarization layer, and the first electrode layer covering a bottom of the at least one third groove is separated from the first electrode layer covering the first passivation layer.   
     
     
         19 . The display substrate according to  claim 18 , wherein at least one of the plurality of display units at the second display region further comprises:
 a second passivation layer, and at least a part of the second passivation layer is arranged at a side of the first planarization layer adjacent to the stretchable substrate,   wherein the first passivation layer comprises a first portion arranged at a side of the first planarization layer away from the stretchable substrate and a second portion at a side of the first planarization layer adjacent to the first opening, the second portion covers a surface of the first planarization layer adjacent to the first opening, and the second portion is connected to a surface of the second passivation layer so that the first passivation layer protects a surface of the first planarization layer adjacent to the first opening in an isolated manner.   
     
     
         20 . The display substrate according to  claim 18 , wherein at least one of the plurality of display units at the second display region further comprises:
 an interlayer insulation layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate,   wherein the first isolation structure comprises at least one first protrusion arranged at a surface of the interlayer insulation layer away from the stretchable substrate, the first electrode layer covers a top of the at least one first protrusion and a part of the surface of the interlayer insulation layer, and the first electrode layer at the top of the at least one first protrusion is separated from the first electrode layer at the surface of the interlayer insulation layer,   wherein at least one of the plurality of wiring units comprises:   a second planarization layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate;   a pixel definition layer arranged at a side of the second planarization layer away from the stretchable substrate, covering a part of a surface of the second planarization layer, and having at least one fourth groove; and   a third electrode layer covering a bottom of the at least one fourth groove and a surface of the pixel definition layer,   wherein the third electrode layer covering the bottom of the at least one fourth groove is separated from the third electrode layer covering the surface of the pixel definition layer,   wherein the quantity of third grooves in the at least one third groove is the same as the quantity of fourth grooves in the at least one fourth groove, and the at least one fourth groove is connected to the at least one third groove to form a closed loop surrounding the first opening,   wherein at least one of the plurality of wiring units comprises:   a gate insulation layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate;   at least one second protrusion arranged at a surface of the gate insulation layer away from the stretchable substrate; and   a third electrode layer covering a top of the at least one second protrusion and a surface of the gate insulation layer not covered by the at least one second protrusion,   wherein the third electrode layer covering the top of the at least one second protrusion is separated from the third electrode layer covering the surface of the gate insulation layer,   wherein the quantity of second protrusions in the at least one second protrusion is the same as the quantity of first protrusions in the at least one first protrusion, and the at least one second protrusion is connected to the at least one first protrusion to form a closed loop surrounding the first opening.   
     
     
         21 .- 24 . (canceled) 
     
     
         25 . The display substrate according to  claim 10 , wherein the first opening comprises an open end arranged at a side away from the substrate, a bottom end arranged at a side adjacent to the substrate, and an opening body portion arranged between the open end and the bottom end, wherein an opening width of at least one of the plurality of first openings is arranged in such a manner that an opening width of the opening body portion gradually increases along the light-emitting direction of the display substrate, an opening width of the open end is smaller than a maximum opening width of the opening body portion, and the maximum opening width of the opening body portion is greater than an opening width of the bottom end,
 wherein at least a part of a side wall of the opening body portion adjacent to the open end is of an arc-like shape.   
     
     
         26 . (canceled) 
     
     
         27 . A display panel, comprising the display substrate according to  claim 1 , and a cover plate arranged at a light-exiting side of the display substrate and encapsulated together with the display substrate. 
     
     
         28 .- 30 . (canceled)