A display substrate, a preparation method thereof, and a display device

Abstract

The present application discloses a display substrate, a preparation method thereof, and a display device, comprising: a base substrate, the base substrate comprising a preset area and a display area; a display layer, the display layer being arranged on one side of the base substrate and comprising a first sub-pixel located in the display area and a second sub-pixel located in the preset area; a first black matrix, the first black matrix being arranged in the display area on a side of the display layer facing away from the base substrate, the first black matrix comprising a plurality of first openings corresponding to the first sub-pixels; a shaping layer, the shaping layer being at least partially located in the preset area, the shaping layer comprising a plurality of light-transmitting portions and a plurality of second openings corresponding to the second sub-pixels; a color filter layer, the color filter layer being arranged on a side of the display layer facing away from the base substrate; the color filter layer comprising a plurality of color filters located in the display area and the preset area, the color filters corresponding to the positions of the first openings and the second openings.

Description

Technical Field

[0001] The present application generally relates to the field of display technology, and specifically relates to a display substrate and a preparation method thereof, and a display device. Background Art

[0002] Organic Light-Emitting Diodes (OLEDs) offer advantages such as autonomous illumination, the ability to create flexible screens, high luminous efficiency, and fast response times. With advancements in screen production technology, OLED screen designs are increasingly demanding higher screen-to-body ratios and higher integration of electronic components. Under-display technologies such as under-display cameras and fingerprint sensors, which can function as displays, are becoming increasingly popular.

[0003] For example, under-display camera technology with display functionality allows ambient light to pass through the screen film to the underlying layer, where it is captured by the camera for imaging. This technology requires the film material of the OLED device to have relatively high transmittance. The application of COE (Color Filter on Encapsulation) in FDC (Full Display with Camera) offers significant advantages over polarizers.

[0004] However, due to the obstruction of the black matrix (BM), color filter (CF) and electrode layer, the transmittance of COE-based OLED is very low and cannot meet the transmittance requirements of under-screen technology. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a display substrate and a preparation method thereof, and a display device that can realize under-screen technology.

[0006] In a first aspect, the present application provides a display substrate, comprising:

[0007] A base substrate, the base substrate comprising a preset area and a display area;

[0008] A display layer, the display layer being provided on one side of the base substrate and comprising a first sub-pixel located in the display area and a second sub-pixel located in the preset area;

[0009] a first black matrix, the first black matrix being arranged in the display area of the display layer on a side facing away from the base substrate, the first black matrix comprising a plurality of first openings corresponding to the first sub-pixels;

[0010] a shaping layer, wherein at least a portion of the shaping layer is located in the preset area, and the shaping layer includes a plurality of light-transmitting portions and a plurality of second openings corresponding to the second sub-pixels;

[0011] A color film layer is provided on a side of the display layer away from the substrate. The color film layer includes a plurality of color filters located in the display area and the preset area, and the positions of the color filters correspond to those of the first opening and the second opening.

[0012] Optionally, the shaping layer is provided on the same layer as the first black matrix.

[0013] Optionally, the covering areas of the shaping layer and the first black matrix per unit area are substantially equal.

[0014] Optionally, within the covering area of the shaping layer, grooves penetrating the upper surface and the lower surface of the shaping layer are provided on the shaping layer.

[0015] Optionally, the shaping layer includes a second black matrix. The shaping layer includes a plurality of shaping parts for forming the second opening, and each shaping part includes a light-transmitting part formed by the light-transmitting part and a second light-shielding part formed by the second black matrix.

[0016] Optionally, the first black matrix includes a first light-shielding part for forming the first opening, and the width of the first light-shielding part is greater than the second width of the second light-shielding part.

[0017] Optionally, at the boundary between the display area and the preset area, a third light-shielding part is included, and the width of the third light-shielding part is less than the width of the first light-shielding part in the display area; and / or, the width of the third light-shielding part is greater than the width of the second light-shielding part in the preset area.

[0018] Optionally, the light-transmitting part is located on at least one side of the second light-shielding part; or the light-transmitting part surrounds the second light-shielding part; or at least part of the light-transmitting part overlaps with the second light-shielding part.

[0019] Optionally, the transmittance of the shaping layer is not less than 95%.

[0020] Optionally, touch traces or touch electrodes are included in the preset area, and at least part of the second black matrix overlaps with the touch traces or touch electrodes.

[0021] Optionally, the pixel density of the first sub-pixel in the display area is greater than the pixel density of the second sub-pixel in the preset area.

[0022] Optionally, the film layer thickness of the shaping layer is the same as the film layer thickness of the first black matrix.

[0023] In a second aspect, the present application provides a method for manufacturing a display substrate for manufacturing the display substrate as described in any one of the above. The method includes:

[0024] Provide a substrate

[0025] Form a display layer on the substrate

[0026] Form a first black matrix layer on the display layer and pattern to form a plurality of first openings

[0027] Form a shaping layer on the display layer and pattern to form a plurality of light-transmitting parts and a second opening

[0028] Form a color filter layer on the first black matrix layer and the shaping layer and pattern to form a plurality of color filters, and the color filters correspond to the positions of the first openings and the second openings

[0029] In a third aspect, the present application provides a display device, including the display substrate as described in any one of the above

[0030] The technical solutions provided by the embodiments of the present application may include the following beneficial effects

[0031] For the display substrate provided by the embodiment of the present application, since the coverage areas of the shaping layer and the first black matrix in a unit area are basically equal, the shaping layer fills the area difference of the position of the black matrix in the display area and the preset area, preventing the skew of the covering layer on the color filter substrate and preventing color deviation. By using a transparent material for the shaping layer, high transmittance can be achieved to realize the under-screen technology Description of the Drawings

[0032] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present application will become more obvious

[0033] Figure 1 It is a schematic structural diagram of a display substrate provided by the embodiment of the present application

[0034] Figure 2 It is a plan view of a display substrate provided by the embodiment of the present application

[0035] Figure 3 It is a schematic diagram of inconsistent thickness of a color filter substrate provided by the embodiment of the present application

[0036] Figure 4 It is another schematic diagram of inconsistent thickness of a color filter substrate provided by the embodiment of the present application

[0037] Figures 5 - 9 It is a schematic structural diagram of a display substrate provided by the embodiment of the present application

[0038] Figure 10 It is a schematic diagram of the effect comparison of multiple display substrates provided by the embodiment of the present application

[0039] Figure 11 A schematic flowchart of a method for manufacturing a display substrate provided by an embodiment of the present application. Detailed implementation manners

[0040] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that, for the sake of convenience of description, only parts related to the invention are shown in the drawings.

[0041] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0042] Please refer to Figures 1 - 2 , the present application provides a display substrate, including:

[0043] A substrate substrate 10, the substrate substrate 10 includes a preset area DD and a display area AA;

[0044] A display layer 20, the display layer 20 is disposed on one side of the substrate substrate 10, and includes a first sub-pixel 1 located in the display area AA and a second sub-pixel 2 located in the preset area DD; wherein, the second sub-pixel may be a solid light-emitting unit or may further include at least part of a virtual light-emitting unit.

[0045] A first black matrix 50, the first black matrix 50 is disposed in the display area AA on the side of the display layer 20 away from the substrate substrate 10, and the first black matrix 50 includes a plurality of first openings corresponding to the first sub-pixels 1.

[0046] A shaping layer 60, at least part of the shaping layer 60 is located in the preset area DD, the shaping layer 60 includes a plurality of light-transmitting portions 80 and a plurality of second openings corresponding to the second sub-pixels 2. A color filter layer 30, the color filter layer 30 is disposed on the side of the display layer 20 away from the substrate substrate 10; the color filter layer 30 includes a plurality of color filters 70 located in the display area AA and in the display area AA and the preset area DD; the color filters 70 correspond to the positions of the first openings and the second openings.

[0047] In the embodiment of the present application, the shaping layer 60 and the first black matrix 50 are disposed on the same layer, and the coverage areas of the shaping layer 60 and the first black matrix 50 per unit area are substantially equal. In different embodiments, different settings can be made according to the position of the preset area or different application devices and application scenarios.

[0048] It should be noted that in the embodiments of the present application, the "coverage area" refers to the physical area on the first black matrix 50 or the shaping layer 60 for forming the pixel opening.

[0049] Through research, it is found that in order to improve the transmittance of the imaging area, the method that can be adopted is to reduce the light-emitting area of the imaging area or reduce the shielding area of the BM. However, such a method will make it difficult to achieve thickness consistency in the coating of the color film during the COE process, resulting in uncontrollable thickness of the color film in the process. Figure 3 shows a schematic diagram of the thickness consistency of the color film substrate without setting a BM in the imaging area. Figure 4 shows a schematic diagram of the thickness consistency of the color film substrate by reducing the coverage area of the BM in the imaging area.

[0050] In addition, since a cover layer for flattening and protecting needs to be provided above the color film layer of the display panel, inconsistent thickness of the color film layer will cause inconsistent thickness of the cover layer of the organic material in the display area and the imaging area or the cover layer to be inclined in both areas. That is, the thickness in the display area is higher while the thickness in the imaging area is lower. When displaying, the brightness attenuation degrees of the two areas will be inconsistent. When the viewing angle of the user changes, the brightness, contrast, etc. of the display screen will change, resulting in color deviation; in addition, the increase in reflectivity will make the demarcation between the display area and the imaging area obvious.

[0051] By making the coverage area of the shaping layer and the first black matrix approximately equal per unit area, the shaping layer fills the area difference of the black matrix position in the display area and the preset area, preventing the skew of the cover layer on the upper layer of the color film substrate and preventing color deviation. By using a transparent material for the shaping layer, high transmittance can be achieved, realizing the under-screen technology.

[0052] In the embodiments of the present application, the arrangement manner of the shaping layer 60 and the first black matrix 50 is not limited. The arrangement manner of the shaping layer 60 and the first black matrix 50 can be the same, that is, the width W2 of the second opening is equal to the width W1 of the first opening; the distance L2 between adjacent second openings is equal to the distance L1 between adjacent first openings.

[0053] The arrangement manner of the shaping layer 60 and the first black matrix 50 can also be slightly different. The width W2 of the second opening is less than the width W1 of the first opening; the distance L2 between adjacent second openings is greater than the distance L1 between adjacent first openings. As long as the physical coverage area of the shaping layer 60 between the second openings is approximately close to the physical coverage area of the first black matrix 50 between the first openings.

[0054] It should be noted that when setting the coverage area of the shaping layer per unit area in this application, optionally, if the pixel densities of two regions are the same, the first opening and the second opening can be the same; or, if the pixel densities of the two regions are different, then it is only necessary to ensure that the proportion of the area of the shaping layer in the DD region is the same as the proportion of the area of the BM in the AA region.

[0055] In addition, it should be noted that in the embodiments of this application, the preset region DD can be used to place areas that require high transmittance, such as cameras, image sensors, or infrared sensors. The setting of the corresponding second sub-pixel 2 in this region can be adjusted according to the position and size of the optical element under the preset region DD. When the preset region DD is used for display, it emits light through the light-emitting layer (the second sub-pixel is a solid light-emitting unit). The preset region DD can also not be used for display. For example, by removing the cathode in the sub-pixel, when the panel is displaying, the display region AA can emit light, and the preset region DD does not emit light (the second sub-pixel is a virtual light-emitting unit). This application does not limit this.

[0056] The substrate 10 is a rigid substrate or a flexible substrate. Among them, the material of the rigid substrate can be transparent glass, transparent plastic, etc., and the material of the flexible substrate can be polymer materials such as polyimide (PI), polyethersulfone (PES), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaryl compound (PAR), and glass fiber reinforced plastic (FRP).

[0057] In the embodiments of the present application, the type of the display panel is not limited as long as it is applicable to COE. For example, the display panel can be an active light-emitting display panel, such as an Organic Light-Emitting Diode (OLED) display panel, an Active-Matrix Organic Light-Emitting Diode (AMOLED) display panel, a Passive Matrix OLED display panel, a Quantum Dot Light Emitting Diodes (QLED) display panel, etc. The display panel in the embodiments of the present application can also be a liquid crystal display panel. The present application does not limit the type of the display panel, which can be a vertical electric field type liquid crystal display panel, such as a Twisted Nematic (TN) type liquid crystal display panel, a Multi-domain Vertical Alignment (MVA) type liquid crystal display panel, or a horizontal electric field type liquid crystal display panel, such as a Fringe Field Switching (FFS) type liquid crystal display panel or an In-Plane Switching (IPS) type liquid crystal display panel.

[0058] In the embodiments of the present application, an OLED display panel is used for exemplary illustration. Among them, a plurality of sub-pixels are included on the display layer 20, and the sub-pixels correspond one-to-one to the pixel openings defined by the first black matrix 50 and the shaping layer 60.

[0059] In the embodiments of the present application, the light-emitting unit can adopt an OLED device, and the manufacturing process of the OLED device is the same as that of the existing OLED structure. Optionally, this structure includes a Hole Inject Layer (HIL), a Hole Transport Layer (HTL), an Emitting Layer (EML), a Hole Blocking Layer (HBL), an Electron Transport Layer (ETL), and an Electron Inject Layer (EIL).

[0060] In addition, other hierarchical structures can also be included on the substrate 10 in the embodiments of the present application, such as an array substrate, a Pixel Definition Layer (PDL), a packaging layer, a touch layer, an organic layer, a cover plate, etc. The present application does not limit this. In different application scenarios or different devices, the substrate 10 can select different structures.

[0061] In order to improve the transmittance of the preset area DD, in the embodiments of the present application, by reducing the light-emitting area in the preset area DD, that is, the pixel density of the first sub-pixel 1 in the display area AA is greater than the pixel density of the second sub-pixel 2 in the preset area DD. When adjusting the pixel density, it can be achieved by increasing the pixel pitch or the area of the light-emitting region, and the present application does not limit this.

[0062] In one embodiment of the present application, as Figure 1 shown, the preset area DD is not provided with a black matrix, that is, the shaping layer 60 includes a light-transmitting portion 80. The material of the light-transmitting portion 80 is an organic transparent material or an inorganic transparent material. For example, the material of the light-transmitting portion 80 can be Resin (resin), SOG (Silicon On Glass, silicon-glass bonding structure material), and BCB (benzocyclobutene) of transparent materials. The material of the light-transmitting portion 80 can also be silicon nitride (SiNx) or silicon oxide (SiOx), etc.

[0063] Among them, the arrangement manner of the light-transmitting portion 80 in the preset area DD can be the same as the arrangement manner of the first black matrix 50 in the display area AA. The shaping layer 60 includes a plurality of shaping portions 3 for forming the second opening, the first black matrix 50 includes a first light-shielding portion 4 for forming the first opening, the width of the shaping portion 3 is equal to the width of the first light-shielding portion 4, and the width W1 of the first opening is the same as the width of the second opening.

[0064] Of course, the arrangement manner of the light-transmitting portion 80 can be different from the arrangement manner of the first black matrix 50 in the display area AA, as long as it is ensured that the coverage areas of the shaping layer 60 and the first black matrix 50 per unit area are basically equal.

[0065] As Figure 5 shown, within the coverage area of the shaping layer 60 (i.e., on the shaping portion 3), a groove penetrating the upper surface and the lower surface of the shaping layer 60 is provided on the shaping layer 60. By providing a groove on the shaping portion 3, the coverage area of the solid material of the shaping layer 60 can be reduced, and at the same time, the overall coverage area of a single shaping portion 3 can be increased. In this way, the contact area between the shaping layer 60 and the color filter 70 can be increased, which is more beneficial to the process and reduces the risk of film layer peeling. The present application does not limit the shape, structure, density, position, etc. of the groove.

[0066] In another embodiment of the present application, as Figures 6 - 8 shown, the shaping layer 60 includes a light-transmitting portion 80 and a second black matrix 90. The shaping layer 60 includes a plurality of shaping portions 3 for forming the second opening, and the shaping portion 3 includes a second light-shielding portion 5 formed by the light-transmitting portion 80 and the second black matrix 90.

[0067] Optionally, in the embodiments of the present application, the second black matrix 90 includes a first light-shielding portion 4 for forming the first opening, and the width of the first light-shielding portion 4 is greater than the second width of the second light-shielding portion 5.

[0068] Optionally, the width of the first light-shielding portion 4 is greater than the interval between adjacent color filters; or the width of the first light-shielding portion 4 is greater than the width of the overlapping portion between adjacent color filters, so as to ensure the planarization degree between adjacent color filters or the heights between adjacent color filters are quite the same.

[0069] When specifically arranged, the arrangement manner of the shaping portion 3 may be the same as that of the first light-shielding portion 4 on the first black matrix 50. The width of the shaping portion 3 is equal to the width of the first light-shielding portion 4, and the width W1 of the first opening is the same as the width W2 of the second opening.

[0070] The shaping portion 3 is formed by a light-transmitting portion 80 and a second light-shielding portion 5, and there are various positional relationships therebetween. As Figure 6 shown, the light-transmitting portion 80 is in contact with the second light-shielding portion 5, and the light-transmitting portion 80 is located on one side of the second light-shielding portion 5. As Figure 7 shown, the light-transmitting portion 80 is in contact with the second light-shielding portion 5, and the light-transmitting portion 80 is arranged around the second light-shielding portion 5; of course, the second light-shielding portion 5 may also be arranged around the light-transmitting portion 80; or at least part of the light-transmitting portion 80 overlaps with the second light-shielding portion 5. In different embodiments, it is selected according to different application scenarios or devices, and the present application does not limit this.

[0071] Of course, the arrangement manner of the shaping portion 3 may be different from that of the first black matrix 50 in the display area AA, as long as the coverage areas of the shaping portion 3 and the first black matrix 50 per unit area are basically equal.

[0072] As Figure 8 shown, the light-transmitting portion 80 is not in contact with the second light-shielding portion 5, the light-transmitting portion 80 is located on one side of the second light-shielding portion 5, and a second groove 8 is provided between the light-transmitting portion 80 and the second light-shielding portion 5. As Figure 9 shown, the light-transmitting portion 80 is not in contact with the second light-shielding portion 5, the light-transmitting portion 80 is arranged around the second light-shielding portion 5, and a third groove 9 is provided between the light-transmitting portion 80 and the second light-shielding portion 5.

[0073] Of course, the groove can also be provided at any position of the shaping portion 3, and the groove penetrates the upper surface and the lower surface of the shaping layer 60. By providing the groove on the shaping portion 3, the covering area of the solid material of the shaping layer 60 can be reduced, and at the same time, the overall covering area of a single shaping portion 3 can be increased. In this way, the contact area between the shaping layer 60 and the color filter 70 can be increased, which is more beneficial to the process and reduces the risk of film layer peeling.

[0074] In the embodiment of the present application, the film layer thickness of the shaping layer 60 is the same as the film layer thickness of the first black matrix 50, so as to ensure that when the covering layer 40 is prepared above the color film layer 30, the film layer height of the covering layer 40 can be kept consistent in the display area AA and the preset area DD.

[0075] Optionally, as Figures 6 - 8 shown, in the preset DD area, at least part of the light-transmitting portion 80 of the shaping layer 60 is located above or below the second black matrix 90, and try to ensure that the shaping layer 60 in the DD area is basically the same height as the display area (AA area). For example: the height of the second black matrix 90 in the preset DD area is less than the height of the first black matrix 4 in the display area (AA area).

[0076] Optionally, as Figures 6 - 8 shown, in the preset DD area, the contact surface between at least part of the light-transmitting portion 80 of the shaping layer 60 and the second black matrix 90 is arc-shaped or wavy, which is beneficial to better contact between the two and is not easy to split.

[0077] It should be noted that through various layout methods of the shaping layer 60; optionally, the transmittance of the shaping layer 60 is 95% to 100%, for example: the light-transmitting portion 80 is not less than 95%. By increasing the coverage ratio of the light-transmitting portion 80 on the shaping layer 60, the transmittance of the shaping layer 60 can be controlled. Increasing the covering area of the black matrix will affect the transmittance of the preset area DD. However, if there is a black matrix in the display area AA and no black matrix is provided in the preset area DD, the display difference between the two areas will be relatively obvious. In addition, if a black matrix is provided in the preset area DD, there may be a diffraction problem. The effect without BM is a little better than that with BM, and the camera quality will be improved. In application, control the covering area ratio of the black matrix and the light-transmitting portion 80 in the shaping portion 3 according to requirements.

[0078] Optionally, as Figures 6 - 9 , at the boundary between the display area AA and the preset area DD (as shown by the central dotted line in the figure), part of the first black matrix 50 is located in the preset area DD, or part of the second black matrix 90 in the shaping layer is located in the display area AA, which is beneficial to block light at the boundary; of course, a light-transmitting portion can also be provided in the preset area to contact the black matrix in the display area.

[0079] In this embodiment, a third light-shielding portion 6 is included at the boundary between the display area and the preset area, and the width of the third light-shielding portion 6 is smaller than the width of the first light-shielding portion 4 in the display area; and / or, the width of the third light-shielding portion is greater than the width of the second light-shielding portion 5 in the preset area, so that the transmittance transition between the two areas (the display area and the preset area) can be made more natural.

[0080] Figure 10 The figure shows a comparison chart of the effects of different BM ratios in the preset area DD. Among them, Ref is the case where the coverage ratio of BM in the preset area DD and the display area AA is the same, split1 is the case where the ratio of BM in the preset area DD (small-area BM), split2 is the case where there is no BM in the preset area DD. For example, at least part of the BM in the preset area DD overlaps with the touch wiring or touch electrodes in the preset area (such as the FDC area); optionally, the overlapping area of the BM with the touch wiring or touch electrodes in the preset area DD accounts for 5%-15% of the area of the preset area DD; further, the overlapping area of the BM with the touch wiring or touch electrodes in the preset area DD accounts for 8%-10% of the area of the preset area DD. If a large-area BM is made in the same way as in area AA, there is no gain in transmittance. The central spot energy of split2 (no BM) is higher than that of split1 (with small-area BM), and the resolution is better, but the reflectivity increases. According to research findings, in the preset area DD, the ratio range of the black matrix occupying the shaping layer 60 is 30%-75% for better comprehensive performance (including overall transmittance gain and reflectivity). Optionally, in the preset area DD, the ratio range of the second black matrix occupying the shaping layer 60 is 40%-70%.

[0081] In the embodiment of the present application, the color filters 70 are provided in one-to-one correspondence with the sub-pixels on the display layer 20. The color filters 70 are used to filter the corresponding color light entering therein, so that the three primary color lights for color display can pass through (the green color filter can only pass through green light, the red color filter can only pass through red light, and the blue color filter can only pass through blue light), thereby realizing full-color display.

[0082] The function of the color filter 70 is to only emit the corresponding color light. For example, under the R color film is the R light-emitting device, so that other colors of light cannot pass through. In the dark state, the reflectivity will be suppressed. If the spacing of the CF is too large, there may be a light leakage problem, and the reflectivity is relatively high.

[0083] Currently, the COE technology mainly fabricates a BM black matrix layer on the encapsulation layer, and then fabricates RGB color film layers 30 respectively. Generally, the opening of the BM is larger than the light-emitting area, so as to ensure the brightness of a large viewing angle. The color film should overlap on the BM, and the contact distance is about 3-5 μm, for example, about 4 μm, so as to avoid the problem of process film layer peeling off. A gap will be formed above the BM between adjacent color filters 70 of different colors.

[0084] In the embodiment of the present application, the distance between the color filters 70 within the preset area DD is controlled to be smaller than the distance between the color filters 70 on the display area AA. By controlling the distance of the CF, the light leakage problem within the preset area DD is reduced, and the emissivity in the dark state is suppressed, improving the display effect.

[0085] As Figure 11 shown, the present application provides a method for preparing a display substrate for preparing the display substrate as described in any one of the above, and the method includes:

[0086] S02. Provide a substrate; the substrate can be a flexible substrate, a glass substrate, etc.

[0087] S04. Form a display layer on the substrate. The display layer includes a first sub-pixel located in the display area and a second sub-pixel located in the preset area.

[0088] For example, forming an OLED device layer including a plurality of OLED light-emitting devices on the substrate includes: forming a plurality of separated anodes of the plurality of OLED light-emitting devices on the substrate; forming a pixel defining layer to define a plurality of sub-pixel regions and expose a plurality of separated anodes; forming a plurality of light-emitting layers on the pixel defining layer, so that each light-emitting layer of the plurality of light-emitting layers covers a sub-pixel region; and forming a cathode layer on the plurality of light-emitting layers.

[0089] S06. Form a first black matrix layer on the display layer, and pattern it to form a plurality of first openings.

[0090] For example, forming a whole layer of black matrix material on the display layer, then coating photoresist on the whole layer of black matrix material, pre-baking, exposing and developing the photoresist using a mask plate corresponding to the pattern of the black matrix layer defining a plurality of openings, baking to form a photoresist pattern, and then etching the whole layer of black matrix material through the photoresist pattern to form a black matrix layer defining a plurality of first openings.

[0091] S08. Form a shaping layer on the display layer, and pattern it to form a plurality of light-transmitting portions and a second opening.

[0092] For example, a layer of transparent material is formed on the display layer, and then a photoresist is coated on the layer of transparent material, pre-baked, exposed and developed using a mask corresponding to the pattern of the shaping layer that defines a plurality of openings, baked to form a photoresist pattern, and then the layer of transparent material is etched through the photoresist pattern to form a shaping layer that defines a plurality of second openings.

[0093] S10. A color film layer is formed on the first black matrix layer and the shaping layer, and a plurality of color filters are patterned, and the color filters correspond to the positions of the first opening and the second opening.

[0094] For example, a red color film, a green color film, a blue color film, and a common color film are sequentially formed in the corresponding openings, and the order of forming the color films is not limited thereto. As described above, when the color of the common color film is the same as one of the colors of the red color film, the green color film, and the blue color film, the color films with the same color can be formed simultaneously. The present application does not limit this.

[0095] It should be noted that in the embodiments of the present application, "arranged on the same layer" means that two layers, components, members, elements, or parts are located on the same horizontal plane. In the embodiments of the present application, the "patterning" process generally includes steps such as coating of photoresist, exposure, development, etching, and stripping of photoresist. Additionally, it should be noted that the embodiments of the present application do not limit the forming order of the first black matrix layer and the shaping layer. In different embodiments, according to the composition of the shaping layer, different forming orders may be included.

[0096] The present application provides a display device, including the display substrate as described in any one of the above. The embodiments of the present application do not make specific limitations on the applicability of the display device, and it may be any product or component with a display function such as a television, a notebook computer, a tablet computer, a wearable display device (such as a smart bracelet, a smart watch, etc.), a mobile phone, a virtual reality device, an augmented reality device, an in-vehicle display, an advertising light box, etc.

[0097] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0099] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Terms such as "arranged" that appear herein may mean that one component is directly attached to another component or that one component is attached to another component through an intermediate member. Features described in one embodiment herein may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0100] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for illustrative and explanatory purposes and are not intended to limit the present invention to the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope claimed by the present invention.

Claims

1. A display substrate, characterized in that, include: A base substrate, the base substrate comprising a preset area and a display area; A display layer, the display layer being provided on one side of the base substrate and comprising a first sub-pixel located in the display area and a second sub-pixel located in the preset area; a first black matrix, the first black matrix being arranged in the display area of the display layer on a side facing away from the base substrate, the first black matrix comprising a plurality of first openings corresponding to the first sub-pixels; a shaping layer, the shaping layer being at least partially located within the preset area, the shaping layer comprising a plurality of light-transmitting portions and a plurality of second openings corresponding to the second sub-pixels; the shaping layer further comprising a second black matrix and a plurality of shaping portions for forming the second openings, the shaping portions comprising a second light-shielding portion formed by the light-transmitting portion and the second black matrix; A color filter layer is provided on a side of the display layer away from the base substrate; the color filter layer includes a plurality of color filters located in the display area and the preset area, and the color filters correspond to the positions of the first opening and the second opening.

2. The display substrate according to claim 1, wherein The shaping layer is disposed on the same layer as the first black matrix.

3. The display substrate according to claim 1, wherein The coverage area of the patterning layer and the first black matrix per unit area is substantially equal.

4. The display substrate according to claim 1, wherein In the covering area of the shaping layer, a groove penetrating the upper surface and the lower surface of the shaping layer is provided on the shaping layer.

5. The display substrate according to claim 1, characterized in that, The first black matrix includes a first light shielding portion for forming the first opening, and a width of the first light shielding portion is greater than a second width of the second light shielding portion.

6. The display substrate according to claim 1, wherein A third light shielding portion is included at the boundary between the display area and the preset area, wherein the width of the third light shielding portion is smaller than the width of the first light shielding portion in the display area; and / or the width of the third light shielding portion is larger than the width of the second light shielding portion in the preset area.

7. The display substrate according to claim 1, wherein, The light-transmitting portion is located on at least one side of the second light-shielding portion; or the light-transmitting portion is arranged around the second light-shielding portion; or at least a portion of the light-transmitting portion overlaps with the second light-shielding portion.

8. The display substrate according to claim 1, wherein The preset area includes touch lines or touch electrodes, and the second black matrix at least partially overlaps with the touch lines or touch electrodes.

9. The display substrate according to claim 1, wherein The pixel density of the first sub-pixels in the display area is greater than the pixel density of the second sub-pixels in the preset area.

10. The display substrate according to claim 1, characterized in that, The thickness of the shaping layer is the same as the thickness of the first black matrix.

11. A method for preparing a display substrate, characterized in that, For preparing the display substrate according to any one of claims 1 to 10, the method comprises: providing a substrate; forming a display layer on the base substrate; forming a first black matrix layer on the display layer and patterning the layer to form a plurality of first openings; forming a patterning layer on the display layer, and patterning the patterning layer to form a plurality of light-transmitting portions and a second opening; A color filter layer is formed on the first black matrix layer and the patterning layer, and patterned to form a plurality of color filters, wherein the color filters correspond to positions of the first opening and the second opening.

12. A display device, characterized in that, The display substrate comprises the display substrate as described in any one of claims 1-10.

Images