Display substrate and display module

Abstract

The embodiment of the invention discloses a display substrate and a display module. In one specific implementation mode, the display substrate comprises a substrate, a display area, a middle area and a hole opening area, the hole opening area is arranged on the substrate, the middle area surrounds the hole opening area, the display area surrounds an isolation area, the middle area comprises a middle structure, a first packaging layer, a first metal layer and a second metal layer, the first metal layer comprises a plurality of first metal columns arranged at intervals in the first direction, and the first direction is the direction from the display area to the hole opening area. According to the embodiment, the reflection structure composed of the first metal layer and the second metal layer is arranged in the middle area, so that the intensity of the display light entering the hole opening area can be effectively weakened, interference of the display light to imaging of a camera in the hole opening area is effectively avoided, and the imaging quality of the camera in the hole opening area is effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more specifically, to a display substrate and a display module. Background Art

[0002] In the related Organic Light-Emitting Diode (OLED) display module, a hole (Hole in Active Area, HIAA) is often opened on the screen to accommodate the under-screen camera. The inventors found that part of the display light enters the opening area through direct light of a wide viewing angle, reflection of the metal film layer, reflection of the cover plate, etc., especially a considerable proportion of the display light emitted by the pixels in the display area close to the opening area will enter the opening area, causing interference to the imaging of the camera in the opening area, affecting the imaging quality of the camera, and affecting the user experience. And the inventors believe that as the width of the intermediate area between the display area and the opening area becomes narrower, the above problems will become more serious. Summary of the invention

[0003] The purpose of the present disclosure is to provide a display substrate and a display module to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A first aspect of the present disclosure provides a display substrate, comprising a substrate and a display area, a middle area and an opening area arranged on the substrate, the middle area surrounds the opening area, the display area surrounds the isolation area, the middle area comprises an intermediate structure, a first packaging layer, a first metal layer and a second metal layer stacked in sequence on the substrate, the first metal layer comprises a plurality of first metal columns arranged at intervals along a first direction, and the first direction is a direction from the display area to the opening area.

[0006] Optionally, the intermediate region further includes a first inorganic layer located between the first metal layer and the second metal layer.

[0007] Optionally, the second metal layer includes a plurality of second metal pillars arranged at intervals along the first direction.

[0008] Optionally, an orthographic projection of the first metal pillar on the substrate and an orthographic projection of the second metal pillar on the substrate have a non-overlapping region.

[0009] Optionally, an edge region of the middle region close to the display region includes a light-shielding column arranged on the substrate.

[0010] Optionally, the display area includes a driving circuit layer, a light-emitting functional layer and a second encapsulation layer which are sequentially stacked on the substrate, and the first encapsulation layer and the second encapsulation layer are arranged on the same layer.

[0011] Optionally, the display area also includes a touch function layer arranged on a side of the second packaging layer away from the substrate, the touch function layer includes a first touch metal layer and a second touch metal layer, the first metal layer is arranged on the same layer as the first touch metal layer, and the second metal layer is arranged on the same layer as the second touch metal layer.

[0012] Optionally, the first encapsulation layer has a first groove in an edge area of ​​the middle area close to the opening area, and the middle area also includes a first black matrix layer arranged on a side of the second metal layer away from the substrate, and the first black matrix layer extends into the first groove.

[0013] Optionally, the display area includes a driving circuit layer, a light-emitting function layer, a second packaging layer, a touch function layer and a color filter layer which are sequentially stacked on the substrate, the touch function layer includes a first touch metal layer and a second touch metal layer, the color filter layer includes an array-arranged filter layer and a second black matrix layer located between adjacent filter layers, the first packaging layer and the second packaging layer are arranged on the same layer, the first metal layer and the first touch metal layer are arranged on the same layer, the second metal layer and the second touch metal layer are arranged on the same layer, and the first black matrix layer and the second black matrix layer are arranged on the same layer.

[0014] A second aspect of the present disclosure provides a display module, comprising the display substrate provided by the first aspect of the present disclosure.

[0015] The beneficial effects of the present disclosure are as follows:

[0016] The display substrate provided by the present disclosure can effectively weaken the intensity of display light entering the opening area by setting a reflective structure composed of a first metal layer and a second metal layer in the middle area, thereby effectively avoiding the display light from interfering with the imaging of the camera in the opening area, and effectively improving the imaging quality of the camera in the opening area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 A top view of a display substrate provided by an embodiment of the present disclosure is shown.

[0019] Figure 2 Show Figure 1 A schematic cross-sectional view of a middle region of a display substrate is shown.

[0020] Figure 3Show Figure 1 Another schematic cross-sectional view of the middle region of the display substrate is shown.

[0021] Figure 4 Show Figure 1 Another schematic cross-sectional view of the middle region of the display substrate is shown.

[0022] Figure 5 Show Figure 1 Another schematic cross-sectional view of the middle region of the display substrate is shown. DETAILED DESCRIPTION

[0023] The terms “on”, “formed on” and “disposed on” in the present disclosure may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0024] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0025] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0026] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.

[0027] The first embodiment of the present disclosure provides a display substrate, including a substrate and a display area, a middle area and an opening area arranged on the substrate, the middle area surrounds the opening area, the display area surrounds the isolation area, the middle area includes an intermediate structure, a first packaging layer, a first metal layer and a second metal layer stacked in sequence on the substrate, the first metal layer includes a plurality of first metal columns arranged at intervals along a first direction, and the first direction is a direction from the display area to the opening area.

[0028] The display substrate provided in this embodiment is provided with a reflective structure composed of a first metal layer and a second metal layer including a plurality of first metal pillars arranged at intervals on the first packaging layer in the middle area, so that part of the display light emitted by the pixels in the display area and leaking to the opening area (mainly part of the display light emitted by the pixels in the display area close to the opening area) will be reflected multiple times to weaken the light intensity. For the convenience of description, the part of the display light leaking to the opening area will be referred to as the first display light. And part of the first display light will change the final transmission direction after being reflected by the reflective structure and will not enter the opening area. Therefore, the above-mentioned reflective structure can effectively weaken the intensity of the display light entering the opening area, thereby effectively avoiding the interference of the display light on the imaging of the camera in the opening area, and effectively improving the imaging quality of the camera in the opening area.

[0029] In a specific example, the width of the first metal column (in this embodiment, the width is the length in the first direction) can be set according to parameters such as the type of display substrate and the width of the middle area. For example, a design in which the widths of the first metal columns are equal can be adopted. The width of the gap between adjacent first metal columns can be set according to parameters such as the type of display substrate and the width of the middle area. For example, an equal gap design can be adopted, and the gap width is set to ≥2μm, for example. The width of the first metal column and the width of the gap between adjacent first metal columns are set to increase the number of reflections of the first display light, increase the proportion of the first display light that is finally transmitted in a direction that does not enter the opening area after reflection, and increase the optical path of the first display light.

[0030] In a possible implementation, the edge region of the middle region close to the display region includes a light shielding column disposed on the substrate, so that the large-viewing angle direct display light portion of the first display light can be shielded by the light shielding column, further reducing the intensity of the display light entering the opening region.

[0031] In a possible implementation, the display area includes a driving circuit layer, a light-emitting functional layer, and a second encapsulation layer stacked in sequence on the substrate, and the first encapsulation layer and the second encapsulation layer are arranged on the same layer. Thus, the process flow can be saved, the cost can be reduced, and the production efficiency can be improved.

[0032] In a possible implementation, the display area further includes a touch function layer disposed on a side of the second encapsulation layer away from the substrate, the touch function layer includes a first touch metal layer and a second touch metal layer, the first metal layer and the first touch metal layer are disposed on the same layer, and the second metal layer and the second touch metal layer are disposed on the same layer. Thus, the process flow can be saved, the cost can be reduced, and the production efficiency can be improved.

[0033] In a specific example, for the above implementation, Figure 1 Taking the display substrate shown in the figure as an example, it includes a substrate and a display area 10, a middle area 20 and an opening area 30 formed on the substrate, the middle area 20 surrounds the opening area 30, the display area 10 surrounds the middle area 20, and the middle area 20 is located between the display area 10 and the opening area 30. Figure 1 As shown, the opening area 30 is circular and the middle area 20 is annular.

[0034] See also Figure 2 , Figure 2 for Figure 1 A BB cross-section of

[0035] (2.1) The structure of the display area 10 is as follows:

[0036] The display area 10 includes an intermediate layer 102 , a driving circuit layer, a light-emitting function layer, a second encapsulation layer and a touch function layer which are sequentially stacked on a substrate 101 .

[0037] The intermediate layer 102 includes a barrier layer (Barrier) formed on the substrate 101 and a buffer layer (Buffer) formed on the barrier layer. For example, the substrate 101 can be a flexible substrate of materials such as polyimide (PI), polyethylene naphthalate (PEN), thermoplastic polyester (PET), etc., or a rigid substrate of materials such as glass and quartz. The barrier layer and the buffer layer can be formed on the entire surface of the substrate. For example, the barrier layer can be made of inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride, and the buffer layer can also be made of inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride. The barrier layer is beneficial to blocking water and oxygen from entering the OLED formed later from the bottom. The buffer layer is beneficial to the subsequent material deposition quality.

[0038] The driving circuit layer may also be referred to as a thin film transistor (TFT) layer, including an active layer (Active) formed on the buffer layer by a patterning process, a first gate insulating layer (GI1) 103 formed on the active layer by deposition or the like, a first gate layer (Gate1) formed on the first gate insulating layer 103 by a patterning process, a second gate insulating layer (GI2) 104 formed on the first gate layer by deposition or the like, a second gate layer (Gate2) formed on the second gate insulating layer 104 by a patterning process, a dielectric layer (ILD) formed by deposition or the like, a first source-drain metal layer formed on the dielectric layer and a first flat layer covering the first source-drain metal layer and the exposed dielectric layer, a second source-drain metal layer formed on the first flat layer and a second flat layer covering the second source-drain metal layer and the exposed first flat layer, for example, the first source-drain metal layer forms a source (Source) and a drain (Drain) of a thin film transistor, for example, the source is electrically connected to the active layer through a via hole in the dielectric layer, and the drain is electrically connected to the second source-drain metal layer through a via hole in the first flat layer.

[0039] The light-emitting functional layer includes a pixel definition layer (PDL) formed on the second flat layer and an anode (Anode) arranged in an array. The pixel definition layer has an opening exposing the anode. The anode is, for example, a metal oxide such as ITO, IZO, or a metal such as Ag, Al, Mo, or an alloy material thereof. The anode is electrically connected to the second source and drain metal layer through a via hole in the second flat layer, thereby being electrically connected to the drain of the thin film transistor. The pixel definition layer can be formed using a patterning process and surrounds the anode. Exemplarily, the material of the pixel definition layer can include organic insulating materials such as negative photoresist, polyimide, and epoxy resin.

[0040] The light-emitting functional layer also includes a light-emitting layer (EL) covering the anode and the exposed pixel defining layer and a cathode (Cathode) covering the light-emitting layer. The light-emitting layer and the cathode are, for example, formed on the entire surface. The material of the cathode may include metals such as Mg, Ca, Li or Al or their alloys, or metal oxides such as IZO and ZTO, or organic materials with conductive properties such as PEDOT / PSS (poly 3,4-ethylenedioxythiophene / polystyrene sulfonate).

[0041] The second encapsulation layer includes a first inorganic encapsulation layer covering the cathode, an organic encapsulation layer, and a second inorganic encapsulation layer. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer are formed by deposition or the like. The organic encapsulation layer is formed by inkjet printing. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be formed of inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride, and the organic encapsulation layer can be formed of organic materials such as polyimide (PI) and epoxy resin. Thus, the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are formed into a composite encapsulation layer, which can form multiple protections for the functional structure of the display area and has a better encapsulation effect.

[0042] The touch function layer includes a touch metal layer and a touch protection layer (TOC) which are sequentially stacked on the second packaging layer, wherein the touch metal layer includes a first touch metal layer (Touch Metal A, TMA), a second touch metal layer (Touch Metal B, TMB) and a touch insulating layer (TouchInsulator, TLD) located between the first touch metal layer and the second touch metal layer.

[0043] Figure 2 Only the middle layer 102 of the display area 10 and the first gate insulating layer 103 and the second gate insulating layer 104 in the driving circuit layer are shown, and other film layers, the light-emitting functional layer, the second encapsulation layer and the touch functional layer in the driving circuit layer of the display area 10 are not shown. In order to illustrate the optical path of the display light emitted from the display area 10, Figure 2 Three edge sub-pixels 11 located near the middle area 20 of the display area 10 are also shown.

[0044] (2.2) The structure of the middle area 20 is as follows:

[0045] The middle area 20 includes an isolation area 220 surrounding the opening area 30 and a routing area 210 surrounding the isolation area 220 . The middle structure of the middle area 20 includes a routing structure 219 disposed in the routing area 210 and an isolation structure disposed in the isolation area 220 .

[0046] like Figure 2 As shown, the intermediate region 20 includes a first intermediate layer arranged in the same layer as the intermediate layer 102 of the display region 10, a first gate insulating material layer arranged in the same layer as the first gate insulating layer 103 of the display region 10, and a second gate insulating material layer arranged in the same layer as the second gate insulating layer 104 of the display region 10. In other words, the intermediate layer 102, the first gate insulating layer 103 and the second gate insulating layer 104 of the display region 10 extend to the intermediate region 20.

[0047] like Figure 2As shown, the routing 210 includes a first routing area 211 and a second routing area 212 located on a side of the first routing area 211 away from the display area 10. For example, the width of the first routing area 211 is 80μm-150μm, and the width of the second routing area 212 is 20μm-50μm. The routing structure 219 includes a data signal routing (Data Line) and a gate drive signal routing (GOA Line) arranged in the first routing area 211, and also includes a redundant routing (Dummy Line) arranged in the second routing area 212, and also includes a shading column 231 arranged on the side of the first routing area 211 close to the display area 10, that is, the edge area of ​​the routing area 210 close to the display area 10 or the edge area of ​​the entire middle area 20 close to the display area 10. For example Figure 2 As shown, the light shielding column 231 can be formed by stacking multiple film layers that are respectively arranged at the same layer as the first source and drain metal layer, the first planar layer, the second source and drain metal layer, the second planar layer, the anode, the pixel defining layer, etc. of the display area 10.

[0048] like Figure 2 As shown, the isolation structure in the isolation region 220 includes a plurality of inner isolation pillars (InnerPillar) 221, an isolation dam (Dam) 224, and a plurality of outer isolation pillars (OuterPillar) 225 spaced apart along the first direction. The width of the isolation region 220 is, for example, 220 μm-260 μm. Each inner isolation pillar 221 and each outer isolation pillar 225 are respectively provided with a first gate metal layer 222 provided in the same layer as the first gate layer and a second gate metal layer 223 provided in the same layer as the second gate layer. The corresponding arrangement here, for example, the orthographic projection of an inner isolation pillar 221 on the substrate 101 is located within the orthographic projection of a first gate metal layer 222 on the substrate 101. The first direction is the direction from the display area 10 to the opening area 30, that is, Figure 2 The X direction in .

[0049] The isolation area 220 is mainly used to prevent external water and oxygen from extending from the edge of the opening area 30 along the light-emitting material to the display area 10. Figure 2 As shown:

[0050] Four inner isolation columns 221 are arranged in the inner area of ​​the isolation region 220 close to the display region 10 in the first direction. The inner isolation columns 221 are, for example, metal isolation columns, and are arranged in the same layer as the second source and drain metal layer in the display region 10, for example Figure 2 As shown, the inner isolation column 221 has a side surface close to the opening area 30 and a side surface far from the opening area 30 (ie Figure 2 The left and right side surfaces of the structure are respectively recessed inwards, and this structure can be achieved by side etching. Figure 2The inner isolation column 221 shown, when the light-emitting layer is formed on the entire surface by, for example, an evaporation process, the light-emitting layer can be disconnected at the ends of the inner isolation column 221 close to and far from the hole area 30, thereby isolating the light-emitting layer through the inner isolation column 221 to block the water and oxygen intrusion channel.

[0051] An isolation dam 224 is provided in the middle region of the isolation region 220 in the first direction, for example Figure 2 As shown, the isolation dam 224 can be formed by stacking a plurality of film layers disposed on the same layer as the second source / drain metal layer, the second planarization layer, the pixel definition layer, etc. Figure 2 As shown, the thickness (or height) of the isolation dam 224 is greater than the height of the inner isolation column 221 and the outer isolation column 225. The isolation dam 224 can prevent the organic encapsulation layer in the second encapsulation layer extending to the middle area 20 from overflowing into the opening area 30, thereby improving the reliability of the display substrate.

[0052] Seven outer isolation columns 225 are arranged in the outer area of ​​the isolation region 220 near the opening region 30 in the first direction. The outer isolation columns 225 are, for example, metal isolation columns, and are arranged in the same layer as the second source and drain metal layer in the display region 10, for example Figure 2 As shown, the outer isolation column 225 has a side surface close to the opening area 30 and a side surface far from the opening area 30 (ie Figure 2 The left and right side surfaces of the structure are respectively recessed inwards, and this structure can be achieved by side etching. Figure 2 The outer isolation column 225 shown, when the light-emitting layer is formed on the entire surface by, for example, an evaporation process, the light-emitting layer can be disconnected at the ends of the outer isolation column 225 close to and far from the hole area 30, thereby isolating the light-emitting layer through the outer isolation column 225 to block the water and oxygen intrusion channel.

[0053] like Figure 2 As shown, the middle region 20 also includes a first packaging layer covering the middle structure, wherein the inner side of the isolation dam 224 (ie Figure 2 The first encapsulation layer (on the left side of the middle isolation dam 224) is arranged in the same layer as the second encapsulation layer of the display area 10, or the second encapsulation layer of the display area 10 extends to the inner side of the isolation dam 224 to form the first encapsulation layer of this part, and the first encapsulation layer of this part includes an encapsulation layer 226 and an intermediate inorganic encapsulation layer 227. The encapsulation layer 226 in the first encapsulation layer of this part includes two encapsulation layers arranged in the same layer as the first inorganic encapsulation layer and the organic encapsulation layer of the display area 10, and the intermediate inorganic encapsulation layer 227 in the first encapsulation layer of this part is arranged in the same layer as the second inorganic encapsulation layer of the display area 10. The outer side of the isolation dam 224 (i.e. Figure 2 The first encapsulation layer (on the right side of the middle isolation dam 224 ) includes, for example, a middle-region inorganic encapsulation layer 227 that is disposed on the same layer as the second inorganic encapsulation layer in the display region 10 .

[0054] like Figure 2 As shown, the middle area 20 further includes a first metal layer located on a side of the first packaging layer away from the substrate 101, including a plurality of first metal pillars 41 arranged at intervals along a first direction, and a second metal layer 42 located on a side of the first metal layer away from the substrate 101, and the second metal layer 42 is a continuous structure. The first metal layer is disposed in the same layer as the first touch metal layer in the touch function layer of the display area 10, and the second metal layer 42 is disposed in the same layer as the second touch metal layer in the touch function layer of the display area 10.

[0055] For example Figure 2 As shown in the two optical paths of the first display light emitted by the edge sub-pixels 11, the reflective structure composed of the first metal layer and the second metal layer 42 including a plurality of first metal pillars 41 arranged at intervals along the first direction can effectively weaken the light intensity of the first display light.

[0056] Based on the first embodiment, in the display substrate provided by the second embodiment of the present disclosure, the middle region further includes a first inorganic layer located between the first metal layer and the second metal layer.

[0057] Therefore, the display substrate provided in this embodiment is more conducive to increasing the number of reflections of the first display light, and more conducive to increasing the proportion of the first display light that is not in the opening area after the final transmission direction after reflection, and more conducive to increasing the optical path of the first display light, and can more effectively weaken the intensity of the display light entering the opening area. Moreover, the distance between the first metal layer and the second metal layer can be adjusted by adjusting the thickness of the first inorganic layer, which is more convenient to design the reflective structure, which is conducive to increasing the number of reflections of the first display light, increasing the proportion of the first display light that is not in the opening area after the final transmission direction after reflection, and increasing the optical path of the first display light.

[0058] See also Figure 3 , Figure 3 for Figure 1 Another BB cross-section of

[0059] and Figure 2 The first embodiment shown differs in that Figure 3 In the second embodiment shown, the middle area 20 further includes a first inorganic layer 43 between the first metal layer and the second metal layer 42. The first inorganic layer 43 is disposed in the same layer as the touch insulating layer in the touch function layer of the display area 10.

[0060] For example Figure 3The two optical paths of the first display lights emitted by the edge sub-pixels 11 shown in the figure can effectively weaken the light intensity of the first display lights by the reflective structure consisting of the first metal layer including a plurality of first metal pillars 41 arranged at intervals along the first direction, the first inorganic layer 43 and the second metal layer 42.

[0061] On the basis of the second embodiment, in a display substrate provided in a third embodiment of the present disclosure, the second metal layer includes a plurality of second metal pillars arranged at intervals along the first direction.

[0062] Therefore, the display substrate provided in this embodiment can effectively weaken the intensity of the display light entering the opening area by arranging a reflective structure composed of a first metal layer including a plurality of first metal pillars arranged at intervals, a first inorganic layer and a second metal layer including a plurality of second metal pillars arranged at intervals on the first packaging layer in the middle area, and the second metal layer is designed to include a plurality of second metal pillars arranged at intervals, so that part of the first display light after reflection is directly emitted from the top, which is more conducive to increasing the number of reflections of the first display light and more conducive to increasing the proportion of the first display light whose final transmission direction after reflection does not enter the opening area.

[0063] In a possible implementation, the orthographic projection of the first metal column on the substrate and the orthographic projection of the second metal column on the substrate have a non-overlapping area. Therefore, the first metal column and the second metal column are designed to be roughly staggered in the first direction, which is more conducive to increasing the number of reflections of the first display light and the proportion of the first display light that is finally transmitted in a direction that does not enter the opening area after reflection.

[0064] See also Figure 4 , Figure 4 for Figure 1 Another BB cross-section of

[0065] and Figure 3 The second embodiment shown differs in that Figure 4 In the third embodiment shown, the second metal layer includes a plurality of second metal pillars 42′ arranged at intervals along the first direction.

[0066] Figure 4 As shown, the orthographic edge of the first metal column 41 on the substrate 101 roughly coincides with the orthographic edge of the second metal column 42 on the substrate 101. In addition, it can also be designed that there is a certain distance between the orthographic edge of the first metal column on the substrate 101 and the orthographic edge of the second metal column on the substrate 101.

[0067] For example Figure 4The three optical paths of the first display lights emitted by the edge sub-pixels 11 shown in the figure can effectively weaken the light intensity of the first display lights by a reflective structure consisting of a first metal layer including a plurality of first metal pillars 41 arranged at intervals along a first direction, a first inorganic layer 43, and a second metal layer including a plurality of second metal pillars 42 arranged at intervals along the first direction.

[0068] Based on the first embodiment, in the display substrate provided by the fourth embodiment of the present disclosure, the first encapsulation layer is provided with a first groove in the edge area of ​​the middle area close to the opening area, and the middle area also includes a first black matrix layer arranged on the side of the second metal layer away from the substrate, and the first black matrix layer extends into the first groove.

[0069] Therefore, in this embodiment, without setting a shading column, the first black matrix layer embedded in the first groove of the first packaging layer close to the edge of the opening area can be used to block the wide-viewing angle direct display light portion in the first display light, thereby further weakening the intensity of the display light entering the opening area.

[0070] In a possible implementation, the display area further includes a color filter layer disposed on a side of the touch function layer away from the substrate, the color filter layer includes a filter layer arranged in an array and a second black matrix layer located between adjacent filter layers, and the first black matrix layer and the second black matrix layer are disposed in the same layer. Thus, for a display module adopting a COE (Color On Encapsulation) structure, the process flow can be saved, the cost can be reduced, and the production efficiency can be improved.

[0071] See also Figure 5 , Figure 5 for Figure 1 Another BB cross-section of

[0072] For example, in the fourth embodiment, the display area 10 also includes a color filter layer (CF) arranged on the side of the touch function layer away from the substrate 101, and the color filter layer includes an array-arranged filter layer and a second black matrix layer located between adjacent filter layers. The color filter layer can eliminate ambient light reflection and improve the display effect.

[0073] and Figure 2 The first embodiment shown differs in that Figure 5 In the fourth embodiment shown, the first encapsulation layer is provided with a first groove in the edge region of the middle region 20 close to the opening region 30, and the middle region 20 further includes a first black matrix layer 44 provided on the side of the second metal layer 42 away from the substrate 101, and the first black matrix layer 44 extends into the first groove. The first black matrix layer 44 is provided in the same layer as the second black matrix layer in the color filter layer of the display region 10. In addition, as Figure 5As shown, in the fourth embodiment, it is not necessary to set a light shielding column in the edge area of ​​the middle area 20 close to the display area 10. The first metal layer in the fourth embodiment only includes a plurality of first metal columns 41 arranged at intervals along the first direction in the portion corresponding to the inner side of the isolation dam 224. The first metal layer corresponding to the outer side of the isolation dam 224 can be designed as a continuous structure. The thickness (or height) of the first encapsulation layer corresponding to the outer side of the isolation dam 224 is less than the thickness of the first encapsulation layer corresponding to the inner side of the isolation dam 224. Based on this thickness difference, the light intensity of the first display light can be weakened. For example, the touch insulating layer etching process of the display area 10 can be used to over-etch the inorganic encapsulation layer outside the isolation dam 224 to form a first groove, and the depth of the first groove can be adjusted by the over-etching amount.

[0074] For example Figure 5 The light paths of the two first display lights emitted by the edge sub-pixels 11 shown in the figure are composed of a reflective structure consisting of a first metal layer and a second metal layer 42 including a plurality of first metal pillars 41 arranged at intervals along a first direction and a first black matrix layer 44, which can effectively weaken the light intensity of the first display light.

[0075] In summary, the display substrate provided by the embodiment of the present disclosure can effectively reduce the intensity of the display light entering the opening area by setting a reflective structure in the middle area, thereby effectively avoiding the interference of the display light on the imaging of the camera in the opening area, and effectively improving the imaging quality of the camera in the opening area. In addition, the design of setting a reflective structure in the middle area of ​​the embodiment of the present disclosure is applicable to various display area openings, including display area openings of different shapes and positions, which are classified according to the shape of the openings, such as circular openings, runway-shaped openings, and various special-shaped openings, and are classified according to the position of the openings, such as central holes or offset holes.

[0076] The fifth embodiment of the present disclosure provides a display module, including the above-mentioned display substrate. The display module can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc., and this embodiment does not limit this.

[0077] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope of the present disclosure.

Claims

1. A display substrate, characterized in that: It includes a substrate and a display area, a middle area and an opening area arranged on the substrate, the middle area surrounds the opening area, the display area surrounds the isolation area, the middle area includes an intermediate structure, a first packaging layer, a first metal layer and a second metal layer stacked in sequence on the substrate, the first metal layer includes a plurality of first metal columns arranged at intervals along a first direction, and the first direction is the direction from the display area to the opening area.

2. The display substrate according to claim 1, characterized in that: The intermediate region also includes a first inorganic layer between the first metal layer and the second metal layer.

3. The display substrate according to claim 2, characterized in that: The second metal layer includes a plurality of second metal pillars arranged at intervals along the first direction.

4. The display substrate according to claim 3, characterized in that: An orthographic projection of the first metal column on the substrate and an orthographic projection of the second metal column on the substrate have a non-overlapping region.

5. The display substrate according to claim 1, characterized in that: The edge region of the middle region close to the display region includes a light shielding column arranged on the substrate.

6. The display substrate according to any one of claims 1 to 5, characterized in that: The display area includes a driving circuit layer, a light-emitting function layer, and a second encapsulation layer which are sequentially stacked on the substrate, and the first encapsulation layer and the second encapsulation layer are arranged on the same layer.

7. The display substrate according to claim 6, characterized in that: The display area also includes a touch function layer arranged on a side of the second packaging layer away from the substrate, the touch function layer includes a first touch metal layer and a second touch metal layer, the first metal layer is arranged on the same layer as the first touch metal layer, and the second metal layer is arranged on the same layer as the second touch metal layer.

8. The display substrate according to any one of claims 1 to 4, characterized in that: The first packaging layer has a first groove in an edge area of ​​the middle area close to the opening area. The middle area also includes a first black matrix layer arranged on a side of the second metal layer away from the substrate. The first black matrix layer extends into the first groove.

9. The display substrate according to claim 8, characterized in that: The display area includes a driving circuit layer, a light-emitting function layer, a second packaging layer, a touch function layer and a color filter layer which are sequentially stacked on the substrate, the touch function layer includes a first touch metal layer and a second touch metal layer, the color filter layer includes an array-arranged filter layer and a second black matrix layer located between adjacent filter layers, the first packaging layer and the second packaging layer are arranged in the same layer, the first metal layer and the first touch metal layer are arranged in the same layer, the second metal layer and the second touch metal layer are arranged in the same layer, and the first black matrix layer and the second black matrix layer are arranged in the same layer.

10. A display module, characterized in that: A display substrate comprising any one of claims 1-9.

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