Display device, and display panel and manufacturing method therefor

Abstract

A display panel includes a driving backplane, a first electrode layer, a pixel definition layer, a light-emitting layer and a second electrode. The first electrode layer is disposed on one side of the driving backplane and includes a plurality of first electrodes. The pixel definition layer is arranged on the side, same as the first electrode layer, of the driving backplane and exposes each of the first electrodes. The pixel definition layer includes a filling layer and a cut-off layer stacked in a direction away from the driving backplane, where the filling layer has a thickness smaller than the first electrode layer. The cut-off layer is provided with a separation slot located outside the first electrodes, and a first cut-off slot is provided on a sidewall of the separation slot. The light-emitting layer covers the cut-off layer and the first electrode layer. The second electrode covers the light-emitting layer.

1 . A display panel, comprising:
 a driving backplane;   a first electrode layer, disposed on one side of the driving backplane and comprising a plurality of first electrodes distributed at intervals;   a pixel definition layer, arranged on the side, same as the first electrode layer, of the driving backplane and exposing each of the first electrodes, wherein the pixel definition layer comprises a filling layer and a cut-off layer stacked in a direction away from the driving backplane, the filling layer has a thickness smaller than the first electrode layer and is located outside the first electrodes, the cut-off layer is provided with a separation slot located outside the first electrodes, and a first cut-off slot is provided on a sidewall of the separation slot;   a light-emitting layer, covering the cut-off layer and the first electrode layer; and   a second electrode, covering the light-emitting layer.   
     
     
         2 . The display panel according to  claim 1 , wherein the cut-off layer comprises a plurality of insulating layers stacked in the direction away from the driving backplane, the separation slot exposes the filling layer, the first cut-off slot is provided in an insulating layer of the insulating layers, and the insulating layer where the first cut-off slot is located is any insulating layer other than an insulating layer farthest from the driving backplane. 
     
     
         3 . The display panel according to  claim 1 , wherein the insulating layers of the cut-off layer comprise a first insulating layer, a second insulating layer and a third insulating layer stacked in sequence along the direction away from the driving backplane, and the first cut-off slot is provided in the second insulating layer. 
     
     
         4 . The display panel according to  claim 3 , wherein the sidewall of the separation slot is a slope surface expanding in the direction away from the driving backplane. 
     
     
         5 . The display panel according to  claim 4 , wherein a bottom surface of the first cut-off slot is a slope surface with decreasing depths in the direction away from the driving backplane. 
     
     
         6 . The display panel according to  claim 5 , wherein a slope angle of the bottom surface of the first cut-off slot is larger than a slope angle of the sidewall of the separation slot located on the first insulating layer, and larger than a slope angle of the sidewall of the separation slot located on the third insulating layer. 
     
     
         7 . The display panel according to  claim 5 , wherein a sum of a slope angle of the bottom surface of the first cut-off slot and a slope angle of the sidewall of the separation slot located on the first insulating layer is not greater than 90°; or
 wherein a sum of a slope angle of the bottom surface of the first cut-off slot and a slope angle of the sidewall of the separation slot located on the third insulating layer is not greater than 90°. 
 
     
     
         8 . (canceled) 
     
     
         9 . The display panel according to  claim 4 , wherein an included angle between extending surfaces of two sidewalls of the separation slot is an acute angle. 
     
     
         10 . The display panel according to  claim 5 , wherein the cut-off layer comprises a cut-off portion and an extension portion, the cut-off portion is located outside the first electrodes, the extension portion is located on a surface of the first electrodes away from the driving backplane and has a pixel opening exposing the first electrodes, and a sidewall of the pixel opening is a slope surface expanding in the direction away from the driving backplane. 
     
     
         11 . The display panel according to  claim 10 , wherein a sum of a slope angle of the sidewall of the pixel opening and a slope angle of the bottom surface of the first cut-off slot is not greater than 90°. 
     
     
         12 . The display panel according to  claim 10 , wherein the sidewall of at least a part of the pixel opening is provided with a second cut-off slot. 
     
     
         13 . The display panel according to  claim 12 , wherein a maximum depth of the first cut-off slot is greater than a maximum depth of the second cut-off slot. 
     
     
         14 . The display panel according to  claim 13 , wherein a part of the third insulating layer used for forming a sidewall of the first cut-off slot is inclined to the driving backplane at a first inclination angle;
 a part of the third insulating layer used for forming a sidewall of the second cut-off slot is inclined to the driving backplane at a second inclination angle; and   the first inclination angle is greater than the second inclination angle.   
     
     
         15 . The display panel according to  claim 1 , wherein a planarization portion is formed in a region of the second electrode corresponding to the first electrodes, and a groove portion is formed in a region of the second electrode corresponding to the separation slot, and a smooth transition is present between the planarization portion and the groove portion. 
     
     
         16 . The display panel according to  claim 15 , wherein a depth of the groove portion is less than a depth of the separation slot; or
 wherein the depth of the groove portion is greater than the thickness of the filling layer.   
     
     
         17 - 18 . (canceled) 
     
     
         19 . The display panel according to  claim 15 , wherein the light-emitting layer further comprises a plurality of light-emitting sub-layers connected in series, at least one of the light-emitting sub-layers is connected in series with an adjacent one of the light-emitting sub-layers through a charge generation layer, and a part of the charge generation layer corresponding to the first electrodes is discontinuous with a part of the charge generation layer corresponding to the separation slot. 
     
     
         20 . The display panel according to  claim 1 , wherein the filling layer is in contact with a sidewall of the first electrodes, or
 wherein the filling layer comprises a filling insulating layer and a filling conductive layer stacked in the direction away from the driving backplane, the filling insulating layer is in contact with the sidewall of the first electrodes, and the filling conductive layer is spaced apart from the sidewall of the first electrodes.   
     
     
         21 . The display panel according to  claim 20 , wherein the driving backplane comprises a pixel area and a peripheral area outside the pixel area, the pixel area is provided with a pixel circuit used for driving light emission of the light-emitting layer, and the peripheral area is provided with a peripheral circuit;
 the first electrode layer further comprises an adapter ring, an orthographic projection of the adapter ring on the driving backplane is located in the peripheral area and surrounds the pixel area, the adapter ring is connected with the peripheral circuit, the second electrode is connected with the adapter ring, and the adapter ring is provided with a notch;   the filling conductive layer comprises a main body and a connecting portion, the main body is located within the adapter ring and is spaced apart from the adapter ring; the connecting portion is connected with the main body, passes out of the adapter ring through the notch, is spaced apart from the adapter ring, and is used for receiving an aging voltage signal.   
     
     
         22 . A method for manufacturing the display panel according to  claim 20 , comprising:
 forming the driving backplane;   forming, on a side of the driving backplane, the first electrode layer comprising the plurality of first electrodes distributed at intervals;   forming, on the side of the driving backplane provided with the first electrode layer, the pixel definition layer exposing each of the first electrodes, wherein the pixel definition layer comprises a filling layer and a cut-off layer stacked in a direction away from the driving backplane, the filling layer has a thickness smaller than the first electrode layer and is located outside the first electrodes;   applying, for a specified period of time, an aging voltage signal to the filling conductive layer;   forming, at the cut-off layer, the separation slot located outside the first electrodes and the first cut-off slot located on a sidewall of the separation slot;   forming the light-emitting layer covering the cut-off layer and the first electrode layer; and   forming the second electrode covering the light-emitting layer.   
     
     
         23 . A display device, comprising a display panel, wherein the display panel comprises:
 a driving backplane;   a first electrode layer, disposed on one side of the driving backplane and comprising a plurality of first electrodes distributed at intervals;   a pixel definition layer, arranged on the side, same as the first electrode layer, of the driving backplane and exposing each of the first electrodes, wherein the pixel definition layer comprises a filling layer and a cut-off layer stacked in a direction away from the driving backplane, the filling layer has a thickness smaller than the first electrode layer and is located outside the first electrodes, the cut-off layer is provided with a separation slot located outside the first electrodes, and a first cut-off slot is provided on a sidewall of the separation slot;   a light-emitting layer, covering the cut-off layer and the first electrode layer; and   a second electrode, covering the light-emitting layer.