Display substrate, display panel and mask set

Abstract

Embodiments of the present application provide a display substrate, a display panel and a mask plate set, and relate to the technical field of display. The display substrate comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a spacer group. The first sub-pixel is located at four top corner positions of a first virtual quadrilateral, the second sub-pixel is located inside the first virtual quadrilateral, and an area where the third sub-pixel is located and an area where the first virtual quadrilateral is located have an overlapping area. The spacer group is arranged in an area where part of the first virtual quadrilateral is located. The spacer group comprises at least one main spacer and at least one auxiliary spacer. The area where each spacer in the same spacer group is located and the area where the same first virtual quadrilateral is located have an overlapping area. The display substrate can greatly reduce the probability of the mask plate scratching the spacers and other film layers in the display substrate during the preparation process, and improve the quality of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display substrate, a display panel, and a photomask assembly. Background Technology

[0002] OLED (Organic Light-Emitting Diode) display panels have become the mainstream display products in the market due to their advantages such as wide color gamut, high resolution, high contrast, low power consumption, and flexibility. In OLED display products, spacers (PS) play a supporting role for the FMM (Fine Metal Mask) during the evaporation process. However, the design of spacers in related technologies is relatively simple, and the distribution density of spacers in the display area is high.

[0003] Currently, there is an urgent need for a new design solution for spacers. Summary of the Invention

[0004] The embodiments of this application provide a display substrate, a display panel, and a mask assembly. The display substrate can greatly reduce the probability of the mask scratching the spacers and other film layers in the display substrate, thereby improving the quality of the display panel.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] On one hand, embodiments of this application provide a display substrate, including: a first sub-pixel, a second sub-pixel, a third sub-pixel, and a spacer group;

[0007] The first sub-pixel is located at the four vertices of the first virtual quadrilateral, the second sub-pixel is located inside the first virtual quadrilateral, and the area where the third sub-pixel is located overlaps with the area where the first virtual quadrilateral is located.

[0008] The spacer group is disposed in the area where part of the first virtual quadrilateral is located. The spacer group includes at least one main spacer and at least one auxiliary spacer, and the area where each spacer in the same spacer group is located overlaps with the area where the same first virtual quadrilateral is located.

[0009] In some embodiments of this application, the third sub-pixel is located on the side of the first virtual quadrilateral; or, the third sub-pixel is located inside the first virtual quadrilateral.

[0010] In some embodiments of this application, the third sub-pixel is located at the center of the side of the first virtual quadrilateral, and the second sub-pixel is located at the intersection of the diagonals of the first virtual quadrilateral.

[0011] The first sub-pixel, the second sub-pixel, and the two third sub-pixels are respectively located at the four vertex positions of the second virtual quadrilateral, and the four second virtual quadrilaterals constitute one first virtual quadrilateral;

[0012] The spacer group includes one main spacer and multiple auxiliary spacers, wherein the main spacer and the auxiliary spacers are located in different second virtual quadrilaterals.

[0013] In some embodiments of this application, the spacer group includes one main spacer and two auxiliary spacers, with the three spacers respectively located in different second virtual quadrilaterals.

[0014] In some embodiments of this application, the second virtual quadrilateral for setting the auxiliary spacer has a shared side with the second virtual quadrilateral for setting the main spacer.

[0015] In some embodiments of this application, the spacer group includes one main spacer and three auxiliary spacers, with the four spacers located in different second virtual quadrilaterals.

[0016] In some embodiments of this application, the second sub-pixel is located inside the first virtual triangle, the third sub-pixel is located inside the second virtual triangle, the first virtual triangle and the second virtual triangle constitute the first virtual quadrilateral, and the first virtual triangle and the second virtual triangle are arranged in a mirror symmetry.

[0017] The spacer group includes a main spacer and a plurality of auxiliary spacers. The main spacer is located between the first sub-pixel and the third sub-pixel, and the auxiliary spacers are located on the side of the first virtual quadrilateral.

[0018] In some embodiments of this application, the spacer assembly includes one primary spacer and two secondary spacers;

[0019] The two auxiliary spacers are located on two adjacent sides of the first virtual quadrilateral, the main spacer is located between the two auxiliary spacers, and the main spacer and the two auxiliary spacers are all arranged around one end of the same first sub-pixel.

[0020] In some embodiments of this application, the third sub-pixel includes two pixel blocks, which are respectively located inside two different third virtual triangles, and the two third virtual triangles are arranged in a mirror-symmetrical manner.

[0021] The two first sub-pixels are located at the two vertices of the third virtual triangle, the intersection of the diagonals of the first virtual quadrilateral is the third vertices of the third virtual triangle, and the two third virtual triangles form the second virtual triangle, and the four third virtual triangles form the first virtual quadrilateral.

[0022] In some embodiments of this application, the minimum spacing between the main spacer and the first sub-pixel is a first spacing, and the minimum spacing between the main spacer and the second sub-pixel is a second spacing;

[0023] The minimum spacing between the auxiliary spacer and the first sub-pixel is the third spacing, and the minimum spacing between the auxiliary spacer and the second sub-pixel is the fourth spacing;

[0024] Wherein, the first spacing is smaller than the second spacing, and the third spacing is smaller than the fourth spacing.

[0025] In some embodiments of this application, the minimum spacing between the auxiliary spacer and the second sub-pixel in the adjacent first virtual quadrilateral is a fifth spacing, and the minimum spacing between the auxiliary spacer and the third sub-pixel is a sixth spacing;

[0026] Alternatively, the minimum spacing between the auxiliary spacer and the second sub-pixel is the fifth spacing, and the minimum spacing between the auxiliary spacer and the third sub-pixel in the adjacent first virtual quadrilateral is the sixth spacing;

[0027] The fifth spacing is greater than the sixth spacing.

[0028] In some embodiments of this application, the first sub-pixel is a blue sub-pixel, the second sub-pixel is a red sub-pixel, and the third sub-pixel is a green sub-pixel.

[0029] In some embodiments of this application, the first sub-pixel, the second sub-pixel, and the third sub-pixel are all quadrilaterals.

[0030] Alternatively, the first and second sub-pixels can be rod-shaped, and the third sub-pixel can be horseshoe-shaped.

[0031] On the other hand, embodiments of this application provide a display panel including the display substrate described above.

[0032] In another aspect, embodiments of this application provide a mask set for fabricating the display substrate as described above; the mask set includes a first mask, a second mask, a third mask, and a fourth mask;

[0033] Wherein, the first mask includes a first opening area for forming the first sub-pixel, the second mask includes a second opening area for forming the second sub-pixel, the third mask includes a third opening area for forming the third sub-pixel, and the fourth mask includes a fourth opening area for forming the spacer group.

[0034] The fourth opening region includes at least one main opening and at least one auxiliary opening, the main opening being configured to form the main spacer and the auxiliary opening being configured to form the auxiliary spacer.

[0035] Embodiments of this application provide a display substrate, a display panel, and a mask assembly. The display substrate includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a spacer assembly. The first sub-pixel is located at the four vertices of a first virtual quadrilateral, the second sub-pixel is located inside the first virtual quadrilateral, and the area where the third sub-pixel is located overlaps with the area where the first virtual quadrilateral is located. The spacer assembly is disposed in a portion of the area where the first virtual quadrilateral is located. The spacer assembly includes at least one main spacer and at least one auxiliary spacer, and the areas where each spacer in the same spacer assembly is located overlap with the areas where the same first virtual quadrilateral is located.

[0036] In this way, by placing the spacer group in the area where part of the first virtual quadrilateral is located, the spacer group includes at least one main spacer and at least one auxiliary spacer, and the area where each spacer in the same spacer group is located overlaps with the area where the same first virtual quadrilateral is located, the supporting effect of the spacer group on the fine metal mask during the evaporation process can be greatly enhanced, thereby reducing the probability of the fine metal mask scratching the display substrate during the evaporation process, and thus improving the quality of the display substrate. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 and Figure 2 These are schematic diagrams of the display substrate structure in two related technologies provided in the embodiments of this application;

[0039] Figures 3-6e The following are schematic diagrams of the structures of fourteen display substrates provided for embodiments of this application. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0042] In the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect, only for the purpose of clearly describing the technical solution of the embodiments of this application, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0043] In the development of AMOLED (Active-matrix organic light-emitting diode) display technology, spacers act as a protective shield for the display area, preventing scratches caused by the FMM (Fine Metal Mask) on the existing film layers in the display substrate during the alignment and deposition of the light-emitting functional layer materials. (Reference) Figure 1 or Figure 2 As shown, in OLED (Organic Light Emitting Diode) display products of related technologies, the spacer 4 is a single design, and in order to meet the supporting function of the spacer 4 for the FMM mask, the distribution density of the spacer 4 in the display area of ​​the display substrate is very high. This high-density spacer design occupies a significant amount of space in the display substrate; furthermore, it increases the risk of the spacer itself being damaged by the FMM mask, thereby causing abnormalities in the display substrate. These abnormalities include, but are not limited to, dark spots in the displayed image, film debris falling into the display area, or encapsulation failure of the light-emitting functional layer.

[0044] Therefore, embodiments of this application provide a display substrate, with reference to... Figure 3 or Figure 4 As shown, it includes: first sub-pixel 1, second sub-pixel 2, third sub-pixel 3, and spacer group 400;

[0045] The first sub-pixel 1 is located at the four vertices of the first virtual quadrilateral 101, the second sub-pixel 2 is located inside the first virtual quadrilateral 101, and the area where the third sub-pixel 3 is located overlaps with the area where the first virtual quadrilateral 101 is located.

[0046] The spacer group 400 is disposed in the area where part of the first virtual quadrilateral 101 is located. The spacer group 400 includes at least one main spacer 41 and at least one auxiliary spacer 42. The areas where each spacer (41 or 42) in the same spacer group 400 is located overlap with the area where the same first virtual quadrilateral 101 is located.

[0047] The term "located" generally refers to the center point of a sub-pixel (1, 2, or 3) overlapping with the apex, side, or interior region of the first virtual quadrilateral 101.

[0048] The center point of the aforementioned sub-pixel can be the geometric center of the sub-pixel graphic, or it can be the center of the luminous region of the sub-pixel. The center of the luminous region refers to the location where the luminous intensity is the greatest.

[0049] In an exemplary embodiment, the shape of each sub-pixel can be a polygon, such as a triangle, quadrilateral, pentagon, or other regular polygon; or, the shape of each sub-pixel can be an irregular shape with or without a portion of a polygon. This application does not impose any limitations on this.

[0050] In an exemplary embodiment, reference is made to Figure 3 As shown, the second sub-pixel 2 is located at the intersection of the diagonals of the first virtual quadrilateral 101.

[0051] The overlap between the region containing the third sub-pixel 3 and the region containing the first virtual quadrilateral 101 means that the region containing the third sub-pixel 3 and the region containing the first virtual quadrilateral 101 at least partially overlap. For details, refer to... Figure 3 As shown, the third sub-pixel 3 is located on the side of the first virtual quadrilateral 101; or, refer to Figure 4 As shown, the third sub-pixel 3 is located inside the first virtual quadrilateral 101.

[0052] In an exemplary embodiment, the main spacers 41 and auxiliary spacers 42 in the same spacer group 400 may be connected; or, refer to Figure 3 or Figure 4As shown, the main spacers 41 and auxiliary spacers 42 in the same spacer group 400 are disconnected.

[0053] The main septum 41 and the auxiliary septum 42 are made of the same material, and both can be made of resin. For example, the main septum 41 and the auxiliary septum 42 are both made of light-transmitting resin.

[0054] The height of the main spacer 41 along the substrate direction perpendicular to the display substrate is greater than the height of the auxiliary spacer 42 along the substrate direction perpendicular to the display substrate. The height difference between the two is not limited here and can be determined based on actual conditions.

[0055] The projection shape of the main spacer 41 and the auxiliary spacer 42 along the substrate direction parallel to the display substrate is not limited here. For example, the projection shape can be a polygon, and the specific shape can be determined according to the actual situation.

[0056] In an exemplary embodiment, the projected area of ​​the auxiliary spacer 42 along the substrate direction parallel to the display substrate can be 1 / 3 to 1 / 2 of the projected area of ​​the main spacer 41 along the substrate direction parallel to the display substrate.

[0057] In the display substrate provided in the embodiments of this application, two adjacent first virtual quadrilaterals 101 share a side or a apex. In addition, in order to reduce the probability of the spacer group 400 being damaged, the lower the density of the spacer group 400 is, the better, provided that the spacer group 400 provides sufficient support. Therefore, only the area where some of the first virtual quadrilaterals 101 are located is provided with the spacer group 400.

[0058] It should be noted that the virtual shapes mentioned in the embodiments of this application, such as the first virtual quadrilateral mentioned above, and the second virtual quadrilateral, the first virtual triangle, and the second virtual triangle mentioned below, do not actually exist. They are just concepts proposed to facilitate the description of the positional relationship of each sub-pixel.

[0059] During the vapor deposition process, the main spacer 41 plays a primary supporting role for the FMM mask, while the auxiliary spacer 42 plays a secondary supporting role. When the FMM mask contacts the main spacer 41 and compresses it, the auxiliary spacer 42 can increase the contact area between the spacer assembly 400 and the FMM mask and assist in supporting the FMM mask, preventing the main spacer 41 from being further compressed and thus avoiding damage to the main spacer 41.

[0060] In the embodiments of this application, since the areas where each spacer (41 or 42) in the same spacer group 400 is located overlap with the area where the same first virtual quadrilateral 101 is located, it can be understood that within the area where the same first virtual quadrilateral 101 is located, there are both main spacers 41 and auxiliary spacers 42. This greatly enhances the support of the spacer group 400 for the FMM mask in a local area, preventing the main spacer 41 from being damaged and also preventing the FMM mask from further scratching the film layers in each sub-pixel after the main spacer 41 has been damaged. In addition, since the support of the spacer group 400 is greatly improved compared to the support of a single spacer in related technologies, the density of the spacer group 400 can be reduced, greatly saving the design space of the display substrate.

[0061] In some embodiments of this application, reference is made to Figure 3 As shown, the third sub-pixel 3 is located on the side of the first virtual quadrilateral; or, refer to... Figure 4 As shown, the third sub-pixel 3 is located inside the first virtual quadrilateral.

[0062] In an exemplary embodiment, reference is made to Figure 3 As shown, the third sub-pixel 3 is located at the center of the side of the first virtual quadrilateral 101, and the second sub-pixel 2 is located at the intersection of the diagonals of the first virtual quadrilateral 101; the first sub-pixel 1, the second sub-pixel 2 and the two third sub-pixels 3 are located at the four vertices of the second virtual quadrilateral 102, and the four second virtual quadrilaterals 102 constitute a first virtual quadrilateral 101;

[0063] The spacer group 400 includes a main spacer 41 and a plurality of auxiliary spacers 42, wherein the main spacer 41 and the auxiliary spacers 42 are located in different second virtual quadrilaterals 102.

[0064] The specific number of the auxiliary spacers 42 is not limited here. For example, the number can be 2, 3, 4 or more, which can be determined according to the design space size of the display substrate and the size of the auxiliary spacers 42.

[0065] It should be noted that the main spacer 41 and the auxiliary spacer 42 being located in different second virtual quadrilaterals 102 can include the following situations: only one spacer (41 or 42) is provided in a second virtual quadrilateral 102; or, only one type of spacer (41 or 42) is provided in a second virtual quadrilateral 102, that is, multiple auxiliary spacers 42 can be located in the same second virtual quadrilateral 102.

[0066] In some embodiments of this application, reference is made to Figure 5a , Figure 5b and Figure 5cAs shown, the spacer group 400 includes a main spacer 41 and two auxiliary spacers 42. The three spacers (41 or 42) are located in different second virtual quadrilaterals 102. It can be understood that one spacer (41 or 42) is provided in one second virtual quadrilateral 102.

[0067] For details, please refer to Figure 5a , Figure 5b and Figure 5c As shown, the second virtual quadrilateral 102 with auxiliary spacers 42 shares a side with the second virtual quadrilateral 102 with main spacers 41, so that the two second virtual quadrilaterals 102 with auxiliary spacers 42 share a vertex.

[0068] Alternatively, one of the second virtual quadrilaterals 102 of the auxiliary spacer 42 shares a side with the second virtual quadrilateral 102 of the main spacer 41, such that the other second virtual quadrilateral 102 of the auxiliary spacer 42 shares a vertex with the second virtual quadrilateral 102 of the main spacer 41.

[0069] This greatly enhances the support of the spacer assembly 400 for the FMM mask in a localized area. Furthermore, since the support of the spacer assembly 400 is significantly improved compared to the support of a single spacer in related technologies, the density of the spacer assembly 400 can be reduced, resulting in a reduction of at least 1 / 3 in the density of spacers compared to related technologies.

[0070] In some embodiments of this application, reference is made to Figure 5d and Figure 5e As shown, the spacer assembly 400 includes a primary spacer 41 and a secondary spacer 42, with the two spacers (41 and 42) located inside any two secondary virtual quadrilaterals 102 in the first virtual quadrilateral 101.

[0071] In some embodiments of this application, reference is made to Figure 5f As shown, the spacer group 400 includes two main spacers 41 and two auxiliary spacers 42. Each second virtual quadrilateral 102 has a spacer (41 or 42) inside it, and the two second virtual quadrilaterals 102 with the main spacer 41 share a vertex.

[0072] In some embodiments of this application, reference is made to Figure 5g As shown, the spacer group 400 includes a main spacer 41 and three auxiliary spacers 42, with the four spacers located in different second virtual quadrilaterals 102.

[0073] The meaning of the above four spacers being located in different second virtual quadrilaterals 102 is as follows: the main spacer 41 is located inside any one of the second virtual quadrilaterals 102 in the first virtual quadrilateral 101, and the three auxiliary spacers 42 are located inside the remaining three second virtual quadrilaterals 102 respectively.

[0074] This further enhances the support provided by the spacer group 400 to the FMM mask within a localized area, largely preventing the main spacer 41 from being damaged and also preventing further scratching of the film layers in each sub-pixel by the FMM mask after the main spacer 41 has been damaged. Furthermore, since the support provided by the spacer group 400 is significantly improved compared to the support provided by a single spacer in related technologies, the density of the spacer group 400 can be reduced, greatly saving design space on the display substrate.

[0075] In some exemplary embodiments, reference is made to Figures 5a-5c , Figures 5f-5g In the case where the spacer group 400 includes three spacers (41 or 42) or the spacer group 400 includes four spacers (41 or 42), each spacer is arranged around the second sub-pixel 2 located at the center of the first virtual quadrilateral 101.

[0076] In some exemplary embodiments, reference is made to Figure 4 As shown, the second sub-pixel 2 is located inside the first virtual triangle 103, and the third sub-pixel 3 is located inside the second virtual triangle 104. The first virtual triangle 103 and the second virtual triangle 104 form the first virtual quadrilateral 101, and the first virtual triangle 103 and the second virtual triangle 104 are set in a mirror symmetric manner.

[0077] Among them, reference Figure 6a As shown, the spacer group 400 includes a main spacer 41 and a plurality of auxiliary spacers 42. The main spacer 41 is located between the first sub-pixel 1 and the third sub-pixel 3, and the auxiliary spacers 42 are located on the side of the first virtual quadrilateral 101.

[0078] For example, refer to Figure 6a , Figure 6b , Figure 6c As shown, the spacer group 400 includes a main spacer 41 and two auxiliary spacers 42; the two auxiliary spacers 42 are respectively located on two adjacent sides of the first virtual quadrilateral 101, the main spacer 41 is located between the two auxiliary spacers 42, and the main spacer 41 and the two auxiliary spacers 42 are all arranged around one end A of the same first sub-pixel 1.

[0079] In some exemplary embodiments of this application, where the spacer assembly 400 includes a primary spacer 41 and two secondary spacers 42, reference is made to... Figure 6aAs shown, the two auxiliary spacers 42 are located on two adjacent sides of the first virtual quadrilateral 101, and the main spacer 41 is located between the two auxiliary spacers 42. The main spacer 41 and the two auxiliary spacers 42 can be set around any one of the four vertices of the first virtual quadrilateral 101, near the center of the first virtual quadrilateral 101. The specific arrangement can be determined according to the actual situation and is not limited here.

[0080] In some exemplary embodiments, reference is made to Figure 6b and 6c As shown, with the positions of the main spacer 41 and the auxiliary spacer 42 determined, the angles of the main spacer 41 and the auxiliary spacer 42 are not limited and can be determined according to the actual situation.

[0081] In practical applications, when the thickness of the light-emitting functional layer of the second sub-pixel 2 is greater than the thickness of the light-emitting functional layer of the first sub-pixel 1, and the thickness of the light-emitting functional layer of the second sub-pixel 2 is greater than the thickness of the light-emitting functional layer of the third sub-pixel 3, such as Figure 6b The auxiliary spacer 42 shown needs to be positioned closer to the first sub-pixel 1 and the third sub-pixel, and further away from the second sub-pixel 2. This way, during the vapor deposition process, it can provide better support for the FMM mask, thereby greatly reducing the probability of the FMM mask damaging the main spacer 41 and also reducing the probability of the FMM mask scratching the film layer already applied in the display substrate, thus improving the quality of the display substrate.

[0082] In some embodiments of this application, reference is made to Figures 6a-6e The third sub-pixel 3 comprises two pixel blocks (unlabeled), and the two pixel blocks are located as follows: Figure 6c The two different third virtual triangles 104 shown are arranged in a mirror symmetry; the two first sub-pixels 1 are located at the two vertices of the third virtual triangle 104 respectively; the intersection of the diagonals of the first virtual quadrilateral 101 is the third vertices of the third virtual triangle 104; the two third virtual triangles 104 form the second virtual triangle 103; and the four third virtual triangles 104 form the first virtual quadrilateral 101.

[0083] In some embodiments of this application, reference is made to Figures 5c-5g As shown, the minimum spacing between the main spacer 41 and the first sub-pixel 1 is the first spacing L1, and the minimum spacing between the main spacer 41 and the second sub-pixel 2 is the second spacing L2.

[0084] The minimum spacing between the auxiliary spacer 42 and the first sub-pixel 1 is the third spacing L3, and the minimum spacing between the auxiliary spacer 42 and the second sub-pixel 2 is the fourth spacing L4.

[0085] Among them, the first spacing L1 is smaller than the second spacing L2, and the third spacing L3 is smaller than the fourth spacing L4.

[0086] In an exemplary embodiment, the range of the first spacing L1:second spacing L2 is 4.5:5.5 to 3:7, and the range of the third spacing L3:fourth spacing L4 is also 4.5:5.5 to 3:7. For example, the ratio of the first spacing L1:second spacing L2 to the third spacing L3:fourth spacing L4 is 4:6.

[0087] In practical applications, when the thickness of the light-emitting functional layer of the first sub-pixel 1 is less than the thickness of the light-emitting functional layer of the second sub-pixel 2, and the thickness of the light-emitting functional layer of the third sub-pixel 3 is less than the thickness of the light-emitting functional layer of the second sub-pixel, each spacer (41 or 42) is set away from the second sub-pixel 2 and closer to the first sub-pixel 1 or the third sub-pixel 3. In this way, during the vapor deposition process, it can play a better supporting role for the FMM mask, thereby greatly reducing the probability of the FMM mask damaging the main spacer 41 and also reducing the probability of the FMM mask scratching the film layer in the display substrate, thus improving the quality of the display substrate.

[0088] In some embodiments of this application, reference is made to Figures 6b-6e As shown, the minimum spacing between the auxiliary spacer 42 and the second sub-pixel 2 in the adjacent first virtual quadrilateral 101 is the fifth spacing L5, and the minimum spacing between the auxiliary spacer 42 and the third sub-pixel 3 is the sixth spacing L6.

[0089] Alternatively, the minimum spacing between the auxiliary spacer 42 and the second sub-pixel 2 is the fifth spacing L5, and the minimum spacing between the auxiliary spacer 42 and the third sub-pixel 3 in the adjacent first virtual quadrilateral 101 is the sixth spacing L6; wherein, the fifth spacing L5 is greater than the sixth spacing L6.

[0090] In some embodiments of this application, the range of the fifth spacing L5:sixth spacing L6 is 4.5:5.5 to 3:7. For example, the fifth spacing L5:sixth spacing L6 = 4:6.

[0091] In practical applications, when the thickness of the light-emitting functional layer of the first sub-pixel 1 is less than the thickness of the light-emitting functional layer of the second sub-pixel 2, and the thickness of the light-emitting functional layer of the third sub-pixel 3 is less than the thickness of the light-emitting functional layer of the second sub-pixel, each spacer (41 or 42) is set away from the second sub-pixel 2 and closer to the first sub-pixel 1 or the third sub-pixel 3. In this way, during the vapor deposition process, it can play a better supporting role for the FMM mask, thereby greatly reducing the probability of the FMM mask damaging the main spacer 41 and also reducing the probability of the FMM mask scratching the film layer in the display substrate, thus improving the quality of the display substrate.

[0092] In some embodiments of this application, the first sub-pixel 12 is a blue sub-pixel (B), the second sub-pixel 2 is a red sub-pixel (R), and the third sub-pixel 3 is a green sub-pixel (G).

[0093] In some embodiments of this application, the first sub-pixel 1, the second sub-pixel 2, and the third sub-pixel 3 are all quadrilaterals;

[0094] Alternatively, the first sub-pixel 1 and the second sub-pixel 2 can be rod-shaped, and the third sub-pixel 3 can be horseshoe-shaped.

[0095] It should be noted that a horseshoe shape is a closed figure consisting of an arc and a straight line. The specific angle and size of the horseshoe shape can be determined according to the actual situation.

[0096] An embodiment of this application provides a display panel, including the display substrate as described above.

[0097] The display panel provided in the embodiments of this application can be a flexible display panel (also known as a flexible screen) or a rigid display panel (i.e., a display screen that cannot be bent), and there is no limitation here. The display panel can be an OLED (Organic Light-Emitting Diode) display panel, or any product or component with display function, including OLED televisions, digital cameras, mobile phones, tablet computers, etc.

[0098] OLED display panels include AMOLED (Active-matrix organic light emitting diode) display panels and PMOLED (Passive matrix OLED) display panels.

[0099] It should be noted that the embodiments of this application are described using an OLED display panel as an example. In practical applications, the display panel can also be a liquid crystal display panel or other types of display panels. The specific type can be determined according to the actual situation and is not limited here.

[0100] The display panel provided in the embodiments of this application has an overlapping area between the area where each spacer (41 or 42) in the same spacer group 400 is located and the area where the same first virtual quadrilateral 101 is located. Thus, within the area where the same first virtual quadrilateral 101 is located, there are both main spacers 41 and auxiliary spacers 42. This greatly enhances the support of the spacer group 400 for the FMM mask in a localized area, preventing the main spacer 41 from being damaged and also preventing further scratching of the film layers in each sub-pixel by the FMM mask after the main spacer 41 has been damaged. Furthermore, since the support of the spacer group 400 is significantly improved compared to the support of a single spacer in related technologies, the density of the spacer group 400 can be reduced, greatly saving design space for the display substrate.

[0101] An embodiment of this application provides a mask set for fabricating a display substrate as described above; the mask set includes a first mask, a second mask, a third mask, and a fourth mask;

[0102] The first mask includes a first opening region for forming a first sub-pixel 1, the second mask includes a second opening region for forming a second sub-pixel 2, the third mask includes a third opening region for forming a third sub-pixel 3, and the fourth mask includes a fourth opening region for forming a spacer group 400.

[0103] The fourth opening region includes at least one main opening and at least one auxiliary opening, the main opening being configured to form a main septum 41 and the auxiliary opening being configured to form an auxiliary septum 42.

[0104] Specifically, the shape of the first opening area corresponds to the shape of the first sub-pixel 1, the shape of the second opening area corresponds to the shape of the second sub-pixel 2, and the shape of the third opening area corresponds to the shape of the third sub-pixel 3. The shape of the main opening in the fourth opening area corresponds to the shape of the main spacer 41, and the shape of the auxiliary opening in the fourth opening area corresponds to the shape of the auxiliary spacer 42. It should be noted that the shapes described here are all projection shapes of the first sub-pixel 1, the second sub-pixel 2, the third sub-pixel 3, the main spacer 41, and the auxiliary spacer 42 on the substrate of the display substrate.

[0105] In the display substrate prepared using the mask assembly provided in the embodiments of this application, since the areas where each spacer (41 or 42) in the same spacer group 400 is located overlaps with the area where the same first virtual quadrilateral 101 is located, the area where the same first virtual quadrilateral 101 is located contains both a main spacer 41 and an auxiliary spacer 42. This greatly enhances the support of the spacer group 400 for the FMM mask in a local area, preventing the main spacer 41 from being damaged and also preventing the FMM mask from further scratching the film layers in each sub-pixel after the main spacer 41 has been damaged. In addition, since the support of the spacer group 400 is greatly improved compared to the support of a single spacer in related technologies, the placement density of the spacer group 400 can be reduced, greatly saving the design space of the display substrate.

[0106] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display substrate, characterized in that, include: First sub-pixel, second sub-pixel, third sub-pixel, and spacer group; The first sub-pixel is located at the four vertices of the first virtual quadrilateral, the second sub-pixel is located inside the first virtual quadrilateral, and the area where the third sub-pixel is located overlaps with the area where the first virtual quadrilateral is located. The spacer group is disposed in the area where a portion of the first virtual quadrilateral is located. The spacer group includes at least one main spacer and at least one auxiliary spacer, and the areas where each spacer in the same spacer group is located overlap with the areas where the same first virtual quadrilateral is located. The height of the main spacer along the direction perpendicular to the substrate of the display substrate is greater than the height of the auxiliary spacer along the direction perpendicular to the substrate of the display substrate. The spacer group is used to support the fine metal mask during the vapor deposition process. Wherein, the minimum distance between the main spacer and the first sub-pixel is the first distance, and the minimum distance between the main spacer and the second sub-pixel is the second distance; the first distance is less than the second distance; The minimum spacing between the auxiliary spacer and the first sub-pixel is the third spacing, and the minimum spacing between the auxiliary spacer and the second sub-pixel is the fourth spacing; the third spacing is smaller than the fourth spacing. The first sub-pixel, the second sub-pixel, and the third sub-pixel all include a light-emitting functional layer, the thickness of the light-emitting functional layer of the second sub-pixel is greater than the thickness of the light-emitting functional layer of the first sub-pixel; the thickness of the light-emitting functional layer of the second sub-pixel is greater than the thickness of the light-emitting functional layer of the third sub-pixel; The minimum spacing between the auxiliary spacer and the second sub-pixel in the adjacent first virtual quadrilateral is the fifth spacing, and the minimum spacing between the auxiliary spacer and the third sub-pixel is the sixth spacing; Alternatively, the minimum spacing between the auxiliary spacer and the second sub-pixel is the fifth spacing, and the minimum spacing between the auxiliary spacer and the third sub-pixel in the adjacent first virtual quadrilateral is the sixth spacing; The fifth spacing is greater than the sixth spacing.

2. The display substrate according to claim 1, characterized in that, The third sub-pixel is located on the side of the first virtual quadrilateral; or, the third sub-pixel is located inside the first virtual quadrilateral.

3. The display substrate according to claim 1, characterized in that, The third sub-pixel is located at the center of the side of the first virtual quadrilateral, and the second sub-pixel is located at the intersection of the diagonals of the first virtual quadrilateral. The first sub-pixel, the second sub-pixel, and the two third sub-pixels are respectively located at the four vertex positions of the second virtual quadrilateral, and the four second virtual quadrilaterals constitute one first virtual quadrilateral; The spacer group includes one main spacer and multiple auxiliary spacers, wherein the main spacer and the auxiliary spacers are located in different second virtual quadrilaterals.

4. The display substrate according to claim 3, characterized in that, The septum assembly includes one main septum and two auxiliary septums, with the three septums located in different second virtual quadrilaterals.

5. The display substrate according to claim 4, characterized in that, The second virtual quadrilaterals of the auxiliary spacers all share a common side with the second virtual quadrilaterals of the main spacers.

6. The display substrate according to claim 3, characterized in that, The septum assembly includes one main septum and three auxiliary septums, with the four septums located in different second virtual quadrilaterals.

7. The display substrate according to claim 1, characterized in that, The second sub-pixel is located inside the first virtual triangle, and the third sub-pixel is located inside the second virtual triangle. The first virtual triangle and the second virtual triangle form the first virtual quadrilateral, and the first virtual triangle and the second virtual triangle are arranged in a mirror symmetry. The spacer group includes a main spacer and a plurality of auxiliary spacers. The main spacer is located between the first sub-pixel and the third sub-pixel, and the auxiliary spacers are located on the side of the first virtual quadrilateral.

8. The display substrate according to claim 7, characterized in that, The septum assembly includes one primary septum and two secondary septums; The two auxiliary spacers are located on two adjacent sides of the first virtual quadrilateral, the main spacer is located between the two auxiliary spacers, and the main spacer and the two auxiliary spacers are all arranged around one end of the same first sub-pixel.

9. The display substrate according to claim 7, characterized in that, The third sub-pixel includes two pixel blocks, which are located inside two different third virtual triangles, and the two third virtual triangles are arranged in a mirror-symmetric manner. The two first sub-pixels are located at the two vertices of the third virtual triangle, the intersection of the diagonals of the first virtual quadrilateral is the third vertices of the third virtual triangle, and the two third virtual triangles form the second virtual triangle, and the four third virtual triangles form the first virtual quadrilateral.

10. The display substrate according to claim 1, characterized in that, The first sub-pixel is a blue sub-pixel, the second sub-pixel is a red sub-pixel, and the third sub-pixel is a green sub-pixel.

11. The display substrate according to claim 1, characterized in that, The first sub-pixel, the second sub-pixel, and the third sub-pixel are all quadrilaterals. Alternatively, the first and second sub-pixels can be rod-shaped, and the third sub-pixel can be horseshoe-shaped.

12. A display panel, characterized in that, Includes the display substrate as described in any one of claims 1-11.

13. A photomask assembly, characterized in that, Used to prepare a display substrate as described in any one of claims 1-11; the mask set includes a first mask, a second mask, a third mask, and a fourth mask; Wherein, the first mask includes a first opening area for forming the first sub-pixel, the second mask includes a second opening area for forming the second sub-pixel, the third mask includes a third opening area for forming the third sub-pixel, and the fourth mask includes a fourth opening area for forming the spacer group. The fourth opening region includes at least one main opening and at least one auxiliary opening, the main opening being configured to form the main spacer and the auxiliary opening being configured to form the auxiliary spacer.

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