Display substrate, display device and mask plate

Abstract

The invention provides a display substrate. The display substrate comprises a substrate body; the plurality of sub-pixels are located on the substrate, the plurality of sub-pixels comprise a plurality of first sub-pixel columns and a plurality of second sub-pixel columns, the plurality of first sub-pixel columns and the plurality of second sub-pixel columns are alternately arranged along a first direction, the first sub-pixel columns comprise a plurality of first sub-pixels and a plurality of second sub-pixels, and the second sub-pixels comprise a plurality of second sub-pixels and a plurality of second sub-pixels. The plurality of first sub-pixels and the plurality of second sub-pixels are alternately arranged at intervals along the second direction; the second sub-pixel column comprises a plurality of third sub-pixels; the plurality of third sub-pixels are arranged at intervals along the second direction; wherein the first sub-pixel is provided with a first pixel opening, the second sub-pixel is provided with a second pixel opening, the third sub-pixel is provided with a third pixel opening, and the area of the orthographic projection of the third pixel opening on the substrate is smaller than that of the orthographic projection of the first pixel opening on the substrate. And the area of the orthographic projection of the third pixel opening on the substrate is smaller than that of the orthographic projection of the second pixel opening on the substrate.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display substrate, a display device and a mask plate. Background Art

[0002] Organic Light-Emitting Diode (OLED) display technology is a technology that uses organic semiconductor materials to emit light under the drive of electric current to achieve display. OLED display devices have the advantages of being light, thin, low power consumption, high contrast, and flexible display. Therefore, OLED display technology is considered to be a new generation of display technology with a promising future. How to improve the aperture ratio of OLED display substrates is one of the topics that display product developers are concerned about.

[0003] The above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art. Summary of the invention

[0004] In one aspect, a display substrate is provided, comprising:

[0005] substrate substrate;

[0006] A plurality of sub-pixels are located on the substrate, the plurality of sub-pixels include a plurality of first sub-pixel columns and a plurality of second sub-pixel columns, the plurality of first sub-pixel columns and the plurality of second sub-pixel columns are alternately arranged along a first direction, the first sub-pixel column includes a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels and the plurality of second sub-pixels are alternately and alternately arranged along a second direction, the first direction and the second direction intersect, the second sub-pixel column includes a plurality of third sub-pixels, the plurality of third sub-pixels are alternately arranged along the second direction;

[0007] Among them, the first sub-pixel has a first pixel opening, the second sub-pixel has a second pixel opening, and the third sub-pixel has a third pixel opening, the area of ​​the orthographic projection of the third pixel opening on the substrate is smaller than the area of ​​the orthographic projection of the first pixel opening on the substrate, and the area of ​​the orthographic projection of the third pixel opening on the substrate is smaller than the area of ​​the orthographic projection of the second pixel opening on the substrate.

[0008] According to some exemplary embodiments, a size of the third pixel opening along the first direction is smaller than a size of the third pixel opening along the second direction.

[0009] According to some exemplary embodiments, a size of the third pixel opening along the first direction is less than or equal to half of a size of the third pixel opening along the second direction.

[0010] According to some exemplary embodiments, a size of the third pixel opening along the first direction is smaller than a size of the first pixel opening along the first direction; and / or,

[0011] A size of the third pixel opening along the first direction is smaller than a size of the second pixel opening along the first direction.

[0012] According to some exemplary embodiments, a size of the third pixel opening along the first direction is smaller than half a size of the first pixel opening along the first direction; and / or,

[0013] A size of the third pixel opening along the first direction is smaller than half a size of the second pixel opening along the first direction.

[0014] According to some exemplary embodiments, a size of the third pixel opening along the second direction is greater than a size of the first pixel opening along the second direction; and / or,

[0015] A size of the third pixel opening along the second direction is greater than a size of the second pixel opening along the second direction.

[0016] According to some exemplary embodiments, a size of the first pixel opening along the first direction is greater than or equal to a size of the first pixel opening along the second direction; and / or,

[0017] A size of the second pixel opening along the first direction is greater than or equal to a size of the second pixel opening along the second direction.

[0018] According to some exemplary embodiments, a spacing between two adjacent third pixel openings along the second direction is a first spacing, a spacing between the first pixel opening and the adjacent second pixel opening along the second direction is a second spacing, and the second spacing is less than half of the first spacing.

[0019] According to some exemplary embodiments, the third sub-pixel is a red sub-pixel, the first sub-pixel is a green sub-pixel, and the second sub-pixel is a blue sub-pixel.

[0020] According to some exemplary embodiments, the ratio of the first pixel opening area to the third pixel opening area is greater than 1 and less than or equal to 4; and / or,

[0021] A ratio of the second pixel opening area to the third pixel opening area is greater than or equal to 1.5 and less than or equal to 5.

[0022] According to some exemplary embodiments, in a first subpixel and a second subpixel adjacent to each other along the second direction and a third subpixel adjacent to the first subpixel and the second subpixel along the first direction, the geometric center of the orthographic projection of the first pixel opening on the substrate is the first center, the geometric center of the orthographic projection of the second pixel opening on the substrate is the second center, and the geometric center of the orthographic projection of the third pixel opening on the substrate is the third center, and the third center is located on the side of the midpoint of the line connecting the first center and the second center that is closer to the second center.

[0023] According to some exemplary embodiments, a side of the third pixel opening away from the first sub-pixel along the second direction is substantially flush with a side of the second pixel opening away from the first sub-pixel along the first direction.

[0024] According to some exemplary embodiments, in the first subpixel and the second subpixel adjacent to each other along the second direction and the third subpixel adjacent to the first subpixel and the second subpixel along the first direction, the geometric center of the orthographic projection of the first pixel opening on the substrate is the first center, the geometric center of the orthographic projection of the second pixel opening on the substrate is the second center, and the geometric center of the orthographic projection of the third pixel opening on the substrate is the third center, and the third center is located on the side of the midpoint of the line connecting the first center and the second center that is closer to the first center.

[0025] According to some exemplary embodiments, a side of the third pixel opening away from the second sub-pixel along the second direction is substantially flush with a side of the first pixel opening away from the second sub-pixel along the first direction.

[0026] According to some exemplary embodiments, the display substrate includes a driving circuit layer located on the base substrate and a light-emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer includes a source-drain metal layer closest to the light-emitting device layer, the source-drain metal layer includes a power signal line extending along the second direction, and the orthographic projection of the third pixel opening on the base substrate is located within the orthographic projection of the power signal line on the base substrate.

[0027] According to some exemplary embodiments, the display substrate includes a driving circuit layer located on the base substrate and a light emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer includes a source-drain metal layer closest to the light emitting device layer, and the source-drain metal layer includes a data signal line extending along the second direction; and

[0028] The orthographic projection of the third pixel opening on the base substrate partially overlaps with the orthographic projection of the data signal line on the base substrate, and the geometric center of the orthographic projection of the third pixel opening on the base substrate is located within the orthographic projection of the data signal line on the base substrate.

[0029] According to some exemplary embodiments, the display substrate includes a driving circuit layer located on the base substrate and a light-emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer includes a source-drain metal layer closest to the light-emitting device layer, and the source-drain metal layer includes a data signal line extending along the second direction and a blank trace extending along the second direction;

[0030] A first portion of an orthographic projection of the third pixel opening on the base substrate overlaps with an orthographic projection of the data signal line on the base substrate, and a second portion of an orthographic projection of the third pixel opening on the base substrate overlaps with an orthographic projection of the blank line on the base substrate; and

[0031] The first portion and the second portion are respectively located on two sides of a geometric center of an orthographic projection of the third pixel opening on the base substrate along the first direction.

[0032] According to some exemplary embodiments, the display substrate includes a driving circuit layer located on the base substrate and a light-emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer includes a source-drain metal layer closest to the light-emitting device layer, the source-drain metal layer includes a plurality of signal traces, and the plurality of signal traces extend along the second direction and are arranged along the first direction; and

[0033] The orthographic projection of the third pixel opening on the base substrate is located between the orthographic projections of two adjacent signal wirings on the base substrate.

[0034] In another aspect, a display device is provided, comprising the display substrate as described in any one of the above items.

[0035] In another aspect, a mask plate is provided, the mask plate being used to manufacture the display substrate as described in any one of the above items, the mask plate comprising:

[0036] A first sub-mask plate, used for manufacturing the first sub-pixel, wherein the first sub-mask plate comprises a plurality of first openings arranged in an array;

[0037] a second sub-mask plate, used for manufacturing the second sub-pixel, the second sub-mask plate comprising a plurality of second openings arranged in an array; and

[0038] The third sub-mask is used to make the third sub-pixel. The third sub-mask includes a plurality of third openings arranged in an array. The area of ​​the third openings is smaller than that of the first openings and the area of ​​the third openings is smaller than that of the second openings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings, and will help to have a comprehensive understanding of the present disclosure.

[0040] Figure 1A-1B The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0041] Figure 2A-2B The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0042] Figure 3A A plan view of a mask plate used to manufacture a blue sub-pixel of a display substrate according to some embodiments of the present disclosure is schematically shown.

[0043] Figure 3B Schematically shows the Figure 3A Cross-sectional view taken along the midline AA'.

[0044] Figure 4A-4B A plan view schematically illustrates a first pixel defining portion in a display substrate according to some embodiments of the present disclosure.

[0045] Figure 5 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0046] Figure 6 Schematically shows the Figure 5 Cross-section taken along the midline BB'.

[0047] Figure 7 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0048] Figure 8 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0049] Fig. 9 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0050] Fig.10 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0051] Fig.11 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0052] Fig.12 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0053] Figure 13A-13C The plan views of some mask plates according to embodiments of the present disclosure are schematically shown.

[0054] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0055] In the following description, for the purpose of explanation, many specific details are set forth to provide a comprehensive understanding of various exemplary embodiments. However, it is apparent that various exemplary embodiments may be implemented without these specific details or with one or more equivalent arrangements. In other cases, well-known structures and devices are shown in block diagram form to avoid making various exemplary embodiments unnecessarily obscure. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, the specific shape, configuration, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0056] In the accompanying drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. Thus, the size and relative size of the individual elements are not necessarily limited to the size and relative size shown in the drawings. When the exemplary embodiments may be implemented differently, the specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously or in an order opposite to the described sequence. In addition, the same reference numerals represent the same elements.

[0057] When an element is described as "on" another element, "connected to" another element or "coupled to" another element, the element may be directly on another element, directly connected to another element or directly coupled to another element, or there may be an intermediate element. However, when an element is described as "directly on" another element, "directly connected to" another element or "directly coupled to" another element, there is no intermediate element. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between..." versus "directly between...", "adjacent" versus "directly adjacent" or "on..." versus "directly on...", etc. In addition, the term "connection" may refer to physical connection, electrical connection, communication connection and / or fluid connection. In addition, the X-axis, Y-axis and Z-axis are not limited to the three axes of the rectangular coordinate system, and can be interpreted in a broader sense. For example, the X-axis, Y-axis and Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z such as XYZ, XY, YZ, and XZ. As used herein, the term "and / or" includes any and all combinations of one or more of the listed associated items.

[0058] It should be understood that, although the terms first, second, etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiment, a first element may be named a second element, and similarly, a second element may be named a first element.

[0059] Figure 1A-1B The following schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure, wherein: Figure 1A Schematic diagram of sub-pixels in a display substrate, Figure 1B The sub-pixels in the display substrate and the pixel defining layer located between the sub-pixels are illustrated.

[0060] Reference Figure 1AIn the display substrate, the red sub-pixels R and the green sub-pixels G are alternately arranged along the second direction Y, and the plurality of blue sub-pixels B are arranged at intervals along the second direction Y, that is, the red sub-pixels R and the green sub-pixels G are arranged in the same column, and the plurality of blue sub-pixels B are arranged in the same column. In addition, considering the differences in efficiency and life of the red light-emitting device in the red sub-pixel R, the green light-emitting device in the green sub-pixel G, and the blue light-emitting device in the blue sub-pixel B, the light-emitting areas of the sub-pixels of different colors are set in a certain proportion according to the performance differences of the light-emitting devices of different colors, for example, the light-emitting area of ​​the blue sub-pixel B is the largest, the light-emitting area of ​​the green sub-pixel G is the second largest, and the light-emitting area of ​​the red sub-pixel R is the smallest.

[0061] Combined with reference Figure 1A and Figure 1B The display substrate also includes a pixel defining layer PDL, which has a pixel opening PK. The area where the pixel opening PK is located can be equivalent to the light-emitting area of ​​the sub-pixel. Therefore, the width of the pixel defining layer PDL between two adjacent pixel openings PK will have a greater impact on the aperture ratio of the display panel.

[0062] Figure 2A-2B The following schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure, wherein: Figure 2A Schematic diagram of sub-pixels in a display substrate, Figure 2B The sub-pixels in the display substrate and the pixel defining layer located between the sub-pixels are illustrated. Figure 3A A plan view of a mask plate used to manufacture a blue sub-pixel of a display substrate according to some embodiments of the present disclosure is schematically shown.

[0063] exist Figure 1B In the illustrated structure, the width of the pixel definition layer PDL is substantially the same at all locations. However, the inventors have found through research that since the blue sub-pixels B are located in the same column, combined with the reference Figure 1B and Figure 3A The multiple openings KK in the fine metal mask (FMM) for evaporating the light-emitting layer of the blue sub-pixel B are arranged in the same row along the second direction Y, so that the spacing between adjacent blue sub-pixels B along the second direction in the actually formed display substrate is smaller than Figure 1B The spacing shown is larger. Figures 1A to 2B ,exist Figure 2A and Figure 2B In the display substrate actually formed as shown in FIG. 1 , the pitch of the blue sub-pixels B adjacent to each other along the second direction is 1.3x greater than that of the blue sub-pixels B adjacent to each other along the second direction. Figure 1A and Figure 1B The indicated spacing is larger.

[0064] Combined with reference Figure 2A , Figure 2B and Figure 3A In a column of openings KK, the portion between adjacent openings KK is a rib Rib. The existence of the rib Rib will make the spacing between adjacent blue sub-pixels B along the second direction Y larger than the spacing between other adjacent sub-pixels. In other words, the width of the pixel defining layer PDL between adjacent blue sub-pixels B along the second direction Y needs to be set larger along the second direction Y, which will cause the aperture ratio of the display substrate to decrease.

[0065] In order to more clearly illustrate the problem that the rib Rib between adjacent openings KK may cause the aperture ratio of the display substrate to decrease, Figure 2B The rib area RA is schematically shown in the figure, and the position of the rib area RA and its size along the second direction Y are basically consistent with the position of the rib Rib on the FMM used during evaporation and its size along the second direction Y. The rib area RA represents the aperture loss area caused by the existence of the rib Rib on the FMM used during evaporation.

[0066] It should be noted that the rib area RA is not a region with practical significance in the display substrate. A pixel defining layer PDL is also provided in the rib area RA, and the pixel defining layer PDL in the rib area RA is connected with the pixel defining layers PDL in other regions to form an integrated structure.

[0067] In order to further improve the aperture ratio of the display substrate, the blue sub-pixel B can be designed as "n in 1", that is, the light-emitting layers of n blue sub-pixels B adjacent to each other along the second direction Y are formed by evaporation using a common opening in the FMM, thereby eliminating at least a portion of the ribs on the FMM, thereby effectively improving the aperture ratio.

[0068] The "n in 1" design may be implemented in a "2 in 1" or "4 in 1" manner, or the light-emitting layer 420 of all blue sub-pixels B in a column may be formed by vapor deposition through a slit-shaped opening in the FMM (i.e., Slit FMM vapor deposition). However, the inventors have found that this method may result in uneven spacing between blue sub-pixels B in the same column, thereby affecting the display effect.

[0069] Figure 4A-4B A plan view schematically illustrates a first pixel defining portion in a display substrate according to some embodiments of the present disclosure.

[0070] In order to further improve the aperture ratio of the display substrate while ensuring the display effect of the display substrate, the inventors conducted more in-depth research.

[0071] Reference Figure 2B, the pixel defining layer PDL in the display substrate may be divided into a first pixel defining portion 110 located outside the rib area RA and a second pixel defining portion 120 located within the rib area RA.

[0072] Reference Figure 4A and Figure 4B , adjacent red sub-pixels R, green sub-pixels G and blue sub-pixels B constitute a pixel unit PX, and the first pixel defining portion 110 can be divided into a first sub-portion 111 located in the peripheral area of ​​the pixel unit PX (the area between adjacent pixel units PX) and a second sub-portion 112 located in the sub-pixel spacing area within the pixel unit PX. Considering that adjacent pixel units PX must be spaced at a predetermined distance, the aperture ratio loss caused by the first sub-portion 111 around the pixel unit PX cannot be avoided. Reducing the aperture ratio loss caused by the first sub-portion 111 requires changing the arrangement of the pixel unit PX, which has a greater risk of poor display effect. For the second sub-portion 112 located in the pixel unit PX, considering that a pixel unit PX is divided into three sub-pixels (R, G, B), there will be at least two boundaries. Under this structure, the size of the second sub-portion 112 along the second direction Y is immutable, and the size along the first direction X is limited by the ratio and cannot be adjusted, and the area of ​​the second sub-portion 112 is difficult to further reduce.

[0073] It should be noted that Figure 4A and Figure 4B The case where the second pixel defining portion is not included is taken as an example to more clearly illustrate the first pixel defining portion 110 .

[0074] Return to reference Figure 2B The area of ​​the second pixel defining portion 120 located in the rib area RA may be determined according to a height b along the second direction Y and a width a along the first direction X of the second pixel defining portion 120 .

[0075] Figure 3B Schematically shows the Figure 3A Cross-sectional view taken along the midline AA'.

[0076] Combined with reference Figure 2B , Figure 3A and Figure 3B, the height b of the second pixel defining portion 120 depends on the height RH1 of the rib Rib of the mask plate used for evaporation to form the blue sub-pixel B. The height RH1 of the rib Rib is negatively correlated with the shadow thickness SH (Shadow Height) of the mask plate at the rib Rib. When the mask plate used is fixed, the height RH1 of the rib is fixed, and the height b of the second pixel defining portion 120 is also fixed. Therefore, the area of ​​the second pixel defining portion 120 can be reduced by reducing the width a of the second pixel defining portion 120, thereby improving the aperture ratio of the display substrate. The width a of the second pixel defining portion 120 depends on the width of the blue sub-pixel B along the first direction X, but if the width of the blue sub-pixel B is narrowed, the pixel opening area of ​​the blue sub-pixel B will be reduced, thereby affecting the display effect. In order to reduce the aperture ratio loss caused by the second pixel defining portion 120 without affecting the display effect, the inventors have found that other sub-pixels with smaller areas can be arranged in the same column along the second direction.

[0077] It should be noted that the opening in the mask plate can be obtained by etching the two opposite sides of the mask plate respectively, so that the mask plate has a sharp corner structure at the opening. During the evaporation, one side ( Figure 3B The upper surface shown in the figure faces the substrate to be evaporated, and the distance between the tip of the pointed structure and the side surface of the mask plate facing the substrate to be evaporated along the thickness direction of the mask plate is the shadow thickness SH.

[0078] Figure 5 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure. Figure 6 Schematically shows the Figure 5 Cross-section taken along the midline BB'.

[0079] Combined with reference Figure 5 and Figure 6 The display substrate includes a base substrate 200 and a plurality of sub-pixels located on the base substrate 200, the plurality of sub-pixels include a plurality of first sub-pixel columns PR1 and a plurality of second sub-pixel columns PR2, the plurality of first sub-pixel columns PR1 and the plurality of second sub-pixel columns PR2 are alternately arranged along a first direction X. The first sub-pixel column PR1 includes a plurality of first sub-pixels SP1 and a plurality of second sub-pixels SP2, the plurality of first sub-pixels SP1 and the plurality of second sub-pixels SP2 are alternately and alternately arranged along a second direction Y, and the first direction X and the second direction Y intersect. The second sub-pixel column PR2 includes a plurality of third sub-pixels SP3, the plurality of third sub-pixels SP3 are alternately arranged along the second direction Y. The first sub-pixel SP1 and the second sub-pixel SP2 adjacent to each other along the second direction and a third sub-pixel SP3 adjacent to both the first sub-pixel SP1 and the second sub-pixel SP2 constitute a pixel unit PX.

[0080] The display substrate includes a driving circuit layer 300 located on a base substrate 200 and a light emitting device layer 400 located on a side of the driving circuit layer 300 away from the base substrate 200. The sub-pixel includes a pixel driving unit located in the driving circuit layer 300 and a light emitting device 400a located in the light emitting device layer 400, and the light emitting device 400a is electrically connected to the pixel driving unit.

[0081] The light emitting device layer 400 includes a first electrode layer 410 located on the side of the driving circuit layer 300 away from the substrate 200, a light emitting layer 420 located on the side of the first electrode layer 410 away from the substrate 200, and a second electrode layer 430 located on the side of the light emitting layer 420 away from the substrate 200. A pixel defining layer PDL is also provided between the light emitting layer 420 and the first electrode layer 410, and the pixel defining layer PDL has a first pixel opening PK1, a second pixel opening PK2, and a third pixel opening PK3. The light emitting layer 420 includes a first light emitting sublayer 421, a second light emitting sublayer 422, and a third light emitting sublayer 423. The first light emitting sublayer 421 is located in the first pixel opening PK1 as the light emitting layer of the first subpixel SP1, the second light emitting sublayer 422 is located in the second pixel opening PK2 as the light emitting layer of the second subpixel SP2, and the third light emitting sublayer 423 is located in the third pixel opening PK3 as the light emitting layer of the third subpixel SP3. The first sub-pixel SP1 has a first pixel opening PK1, the second sub-pixel SP2 has a second pixel opening PK2, and the third sub-pixel SP3 has a third pixel opening PK3. The area of ​​the orthographic projection of the third pixel opening PK3 on the substrate substrate 200 is smaller than the area of ​​the orthographic projection of the first pixel opening PK1 on the substrate substrate 200, and the area of ​​the orthographic projection of the third pixel opening PK3 on the substrate substrate 200 is smaller than the area of ​​the orthographic projection of the second pixel opening PK2 on the substrate substrate 200. By arranging the third sub-pixels SP3 with the smallest pixel opening area in the same column along the second direction Y, the width of the third pixel opening PK3 of the third sub-pixel SP3 along the first direction X can be effectively narrowed, so that when the distance between two third sub-pixels SP3 adjacent to each other along the second direction Y is constant, that is, when the distance between two third pixel openings PK3 adjacent to each other along the second direction Y is constant, the area of ​​the interval region between two third pixel openings PK3 adjacent to each other along the second direction Y can be reduced, thereby improving the aperture ratio of the display substrate.

[0082] It should be noted that the area where the first pixel opening PK1 is located is roughly the light-emitting area of ​​the first sub-pixel SP1, the area where the second pixel opening PK2 is located is roughly the light-emitting area of ​​the second sub-pixel SP2, and the area where the third pixel opening PK3 is located is roughly the light-emitting area of ​​the third sub-pixel SP3.

[0083] In addition, refer to Figure 6, affected by the preparation process of the pixel definition layer PDL, the opening area of ​​the first pixel opening PK1 close to the substrate 200 is smaller than the opening area of ​​the first pixel opening PK1 away from the substrate 200, the opening area of ​​the second pixel opening PK2 close to the substrate 200 is smaller than the opening area of ​​the second pixel opening PK2 away from the substrate 200, and the opening area of ​​the third pixel opening PK3 close to the substrate 200 is smaller than the opening area of ​​the third pixel opening PK3 away from the substrate 200. The first pixel opening PK1 herein should be understood as the opening of the side of the pixel definition layer PDL close to the substrate 200 at the first pixel opening PK1, the second pixel opening PK2 herein should be understood as the opening of the side of the pixel definition layer PDL close to the substrate 200 at the second pixel opening PK2, and the third pixel opening PK3 herein should be understood as the opening of the side of the pixel definition layer PDL close to the substrate 200 at the third pixel opening PK3. The aperture ratio of the display substrate should be understood as the percentage of the sum of the areas of the first pixel opening PK1, the second pixel opening PK2 and the third pixel opening PK3 to the area of ​​the pixel unit PX.

[0084] According to some exemplary embodiments, referring to Figure 5 , the first sub-pixel SP1 is a green sub-pixel, the second sub-pixel SP2 is a blue sub-pixel, and the third sub-pixel SP3 is a red sub-pixel. That is, the first sub-pixel SP1 emits green light, the second sub-pixel SP2 emits blue light, and the third sub-pixel SP3 emits red light.

[0085] It should be noted that in Figure 5 In the illustrated pixel arrangement, in the pixel unit PX, the first sub-pixel SP1 is located above the second sub-pixel SP2. According to actual needs, the first sub-pixel SP1 can also be adjusted to be located below the second sub-pixel SP2.

[0086] According to some exemplary embodiments, referring to Figure 5 , according to factors such as the luminous efficiency and luminous brightness of the light-emitting devices in the first sub-pixel SP1, the second sub-pixel SP2 and the third sub-pixel SP3, the sizes of the pixel openings of the first sub-pixel SP1, the second sub-pixel SP2 and the third sub-pixel SP3 are set so that the display substrate has a better display effect. When the first sub-pixel SP1 is a green sub-pixel, the second sub-pixel SP2 is a blue sub-pixel, and the third sub-pixel SP3 is a red sub-pixel, the ratio of the area of ​​the first pixel opening PK1 to the area of ​​the third pixel opening PK3 is greater than 1 and less than or equal to 4, and the ratio of the area of ​​the second pixel opening PK2 to the area of ​​the third pixel opening PK3 is greater than or equal to 1.5 and less than or equal to 5.

[0087] For example, the ratio of the area of ​​the first pixel opening PK1 to the area of ​​the third pixel opening PK3 is 11, 1.2, 1.3, 1.4, 1.5, 2, 2.5, 3, 3.5 or 4, etc.

[0088] For example, the ratio of the area of ​​the second pixel opening PK2 to the area of ​​the third pixel opening PK3 is 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0089] According to some exemplary embodiments, the spacing between two adjacent third pixel openings PK3 along the second direction Y is a first spacing D1, and the spacing between the first pixel opening PK1 and the adjacent second pixel opening PK2 along the second direction Y is a second spacing D2, and the second spacing D2 is less than half of the first spacing D1.

[0090] The inventor has found that when Figure 2A The pixel arrangement shown is changed to Figure 5 In the illustrated pixel arrangement, since the size of the pixel unit PX is fixed, that is, the size of the pixel unit PX along the first direction X and the size along the second direction Y are certain, the spacing between the first sub-pixel column PR1 and the second sub-pixel column PR2 along the first direction X will basically not change, and therefore the area of ​​the spacing region between the first sub-pixel column PR1 and the second sub-pixel column PR2 will not change.

[0091] In addition, factors that may change and thus affect the opening include the area of ​​the spacing region between adjacent first and second subpixels SP1 and SP2 in the first subpixel column PR1 and the area of ​​the spacing region between adjacent third subpixels SP3 in the second subpixel column PR2.

[0092] Since the size of the pixel unit PX along the second direction Y is constant, when Figure 2A The pixel arrangement shown is changed to Figure 5 In the schematic pixel arrangement, the width of the first sub-pixel SP1 and the second sub-pixel SP2 in the first sub-pixel column PR1 along the first direction X increases by x, and the width of the third sub-pixel SP3 in the second sub-pixel column PR2 along the first direction X decreases by x. Then, the total increased area of ​​the spacing area between the first sub-pixel SP1 and the second sub-pixel SP2 in a column of the first sub-pixel column PR1 is 2*n*x*D2, and the total reduced area of ​​the spacing area between adjacent third sub-pixels SP3 in a column of the second sub-pixel column PR2 is n*x*D1. When the total area of ​​the increased spacing area is less than the total area of ​​the reduced spacing area, that is, 2*n*x*D2<n*x*D1, that is, D2<0.5*D1, the aperture ratio of the display substrate is increased.

[0093] It should be noted that n represents the number of first sub-pixels SP1 or the number of second sub-pixels SP2 in a first sub-pixel column PR1, and n also represents the number of third sub-pixels SP3 in a second sub-pixel column PR2, wherein n is a positive integer.

[0094] According to some exemplary embodiments, referring to Figure 5 , the size W3 of the third pixel opening PK3 along the first direction X is smaller than the size H3 of the third pixel opening PK3 along the second direction Y. Since the third sub-pixels SP3 are arranged in a row along the second direction Y, the size of the third pixel opening PK3 along the first direction X is set smaller, and the spacing area (i.e., the spacing area between the third sub-pixels SP3 adjacent to each other along the second direction Y caused by the ribs in the FMM used for evaporation) can be reduced. Figure 5 The area size of the rib region RA) shown in FIG.

[0095] According to some exemplary embodiments, referring to Figure 5 , the size W3 of the third pixel opening PK3 along the first direction X is less than or equal to half of the size H3 of the third pixel opening PK3 along the second direction Y. Since the area of ​​the third pixel opening PK3 is relatively small, when a plurality of third sub-pixels SP3 are arranged in the same column, the size W3 of the third pixel opening PK3 along the first direction X is relatively small, so that W3≤0.5*H3, which is conducive to further reducing the area of ​​the spacing region caused by the ribs in the FMM used for evaporation between the adjacent third sub-pixels SP3 along the second direction Y.

[0096] According to some exemplary embodiments, referring to Figure 5 , the size W3 of the third pixel opening PK3 along the first direction X is smaller than the size W1 of the first pixel opening PK1 along the first direction X, and the size W3 of the third pixel opening PK3 along the first direction X is smaller than the size W2 of the second pixel opening PK2 along the first direction X. In other words, the width of the second sub-pixel column PR2 along the first direction X is narrower than the width of the first sub-pixel column PR1 along the first direction X, which is beneficial to reducing the area of ​​the spacing region caused by the ribs existing in the FMM used for evaporation between adjacent third sub-pixels SP3 in the second sub-pixel column PR2.

[0097] According to some exemplary embodiments, referring to Figure 5, the size W3 of the third pixel opening PK3 along the first direction X is smaller than half of the size W1 of the first pixel opening PK1 along the first direction X, and the size W3 of the third pixel opening PK3 along the first direction X is smaller than half of the size W2 of the second pixel opening PK2 along the first direction X. Since the area of ​​the third pixel opening PK3 is small, when a plurality of third sub-pixels SP3 are arranged in the same column, the size W3 of the third pixel opening PK3 along the first direction X is small, so that W3≤0.5*W2, and W3≤0.5*W1, which is conducive to further reducing the area of ​​the spacing region caused by the ribs in the FMM used for evaporation between the third sub-pixels SP3 adjacent to each other along the second direction Y.

[0098] According to some exemplary embodiments, referring to Figure 5 The size H3 of the third pixel opening PK3 along the second direction Y is greater than the size H1 of the first pixel opening PK1 along the second direction Y, and the size H3 of the third pixel opening PK3 along the second direction Y is greater than the size H2 of the second pixel opening PK2 along the second direction Y.

[0099] According to some exemplary embodiments, referring to Figure 5 The size W1 of the first pixel opening PK1 along the first direction X is greater than or equal to the size H1 of the first pixel opening PK1 along the second direction Y, and the size W2 of the second pixel opening PK2 along the first direction X is greater than or equal to the size H2 of the second pixel opening PK2 along the second direction Y.

[0100] According to some exemplary embodiments, referring to Figure 5 The shapes of the first pixel opening PK1, the second pixel opening PK2 and the third pixel opening PK3 are all rectangular. Due to factors such as the preparation process of the pixel definition layer PDL, the shapes of the first pixel opening PK1, the second pixel opening PK2 and the third pixel opening PK3 can be rounded rectangles, for example, the radius of curvature at the corner can be 1-2 microns.

[0101] Optionally, the shapes of the first pixel opening PK1 , the second pixel opening PK2 and the third pixel opening PK3 may also be other shapes, for example, a triangle, a rhombus or a hexagon.

[0102] According to some exemplary embodiments, referring to Figure 5 The size W2 of the second pixel opening PK2 along the first direction X is substantially equal to the size W1 of the first pixel opening PK1 along the first direction X. The first sub-pixel SP1 and the second sub-pixel SP2 located in the first sub-pixel column PR1 are set to have the same width, which is beneficial to reducing the area of ​​the spacing region between the first sub-pixel SP1 and the second sub-pixel SP2 in the first sub-pixel column PR1, thereby improving the aperture ratio of the display substrate.

[0103] Figure 7 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0104] According to some exemplary embodiments, referring to Figure 7 , the first sub-pixel SP1 and the second sub-pixel SP2 adjacent to each other along the second direction Y and the third sub-pixel SP3 adjacent to the first sub-pixel SP1 and the second sub-pixel SP2 along the first direction X constitute a pixel unit PX, in which the geometric center of the orthographic projection of the first pixel opening PK1 on the substrate is the first center PC1, the geometric center of the orthographic projection of the second pixel opening PK2 on the substrate is the second center PC2, and the geometric center of the orthographic projection of the third pixel opening PK3 on the substrate is the third center PC3. In the second direction Y, the third center PC3 is located on the side of the midpoint MP of the line connecting the first center PC1 and the second center PC2 that is closer to the second center PC2.

[0105] The inventors have discovered that when the resolution of the display substrate is low, for example, when the PPI (Pixels Per Inch) of the display substrate is less than 326, the pixel center of the first sub-pixel SP1 (green sub-pixel) with the highest brightness and the pixel center of the third sub-pixel SP3 (red sub-pixel) with the second lowest brightness within a pixel unit PX can be dispersed in the second direction Y, which is beneficial to visually reduce the display granularity of the display substrate.

[0106] According to some exemplary embodiments, referring to Figure 7 In the pixel unit PX, the side of the third pixel opening PK3 away from the first sub-pixel SP1 along the second direction Y is substantially flush with the side of the second pixel opening PK2 away from the first sub-pixel SP1 along the second direction Y, so that the third center PC3 can be set in a direction close to the second center PC2, that is, the pixel center of the first sub-pixel SP1 and the pixel center of the third sub-pixel SP3 are dispersed in the second direction Y, which is beneficial to further visually reduce the display granularity of the display substrate.

[0107] It should be noted that, affected by factors such as the patterning process accuracy of the pixel defining layer, the side of the third pixel opening PK3 away from the first sub-pixel SP1 along the second direction Y is difficult to be completely flush with the side of the second pixel opening PK2 away from the first sub-pixel SP1 along the second direction Y, and the side of the third pixel opening PK3 away from the first sub-pixel SP1 along the second direction Y is basically flush with the side of the second pixel opening PK2 away from the first sub-pixel SP1 along the second direction Y along the first direction X. It should be understood that the spacing between the side of the third pixel opening PK3 away from the first sub-pixel SP1 along the second direction Y and the side of the second pixel opening PK2 away from the first sub-pixel SP1 along the second direction Y should be less than or equal to a preset distance, which depends on the patterning process accuracy of the pixel defining layer. For example, the preset distance can be 1μm.

[0108] Figure 8 The figure schematically shows a pixel arrangement diagram of a display substrate according to some embodiments of the present disclosure.

[0109] According to some exemplary embodiments, referring to Figure 8 In the pixel unit PX, the first sub-pixel SP1 and the second sub-pixel SP2 adjacent to each other along the second direction Y and the third sub-pixel SP3 adjacent to the first sub-pixel SP1 and the second sub-pixel SP2 along the first direction X constitute a pixel unit PX, in which the geometric center of the orthographic projection of the first pixel opening PK1 on the substrate is the first center PC1, the geometric center of the orthographic projection of the second pixel opening PK2 on the substrate is the second center PC2, and the geometric center of the orthographic projection of the third pixel opening PK3 on the substrate is the third center PC3. In the second direction Y, the third center PC3 is located on the side of the midpoint MP of the line connecting the first center PC1 and the second center PC2 that is closer to the first center PC1.

[0110] The inventors have discovered that when the resolution of the display substrate is high, for example, when the PPI (Pixels Per Inch) of the display substrate is greater than or equal to 326, the pixel center of the first sub-pixel SP1 (green sub-pixel G) with the highest brightness and the pixel center of the third sub-pixel SP3 (red sub-pixel R) with the second lowest brightness within a pixel unit PX can be arranged more concentrated in the second direction Y, which is beneficial to increasing the display sharpness of the display substrate.

[0111] According to some exemplary embodiments, referring to Figure 8The side of the third pixel opening PK3 away from the second sub-pixel SP2 along the second direction Y is basically flush with the side of the first pixel opening PK1 away from the second sub-pixel SP2 along the second direction Y, so that the third center PC3 can be set in the direction of the first center PC1, that is, the pixel center of the first sub-pixel SP1 is closer to the pixel center of the third sub-pixel SP3 in the second direction Y, which is beneficial to further increase the display sharpness of the display substrate.

[0112] It should be noted that, affected by factors such as the patterning process accuracy of the pixel defining layer, the side of the third pixel opening PK3 away from the second sub-pixel SP2 along the second direction Y is difficult to be completely flush with the side of the first pixel opening PK1 away from the second sub-pixel SP2 along the second direction Y. The side of the third pixel opening PK3 away from the second sub-pixel SP2 along the second direction Y is basically flush with the side of the first pixel opening PK1 away from the second sub-pixel SP2 along the second direction Y. It should be understood that the spacing between the side of the third pixel opening PK3 away from the second sub-pixel SP2 along the second direction Y and the side of the first pixel opening PK1 away from the second sub-pixel SP2 along the first direction X should be less than or equal to a preset distance, which depends on the patterning process accuracy of the pixel defining layer. For example, the preset distance can be 1μm.

[0113] Fig. 9 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0114] According to some exemplary embodiments, in combination with reference Figure 6 and Fig. 9 The display substrate includes a driving circuit layer 300 located on a base substrate 200 and a light emitting device layer 400 located on a side of the driving circuit layer 300 away from the base substrate 200. The driving circuit layer 300 includes a source-drain metal layer SD closest to the light emitting device layer 400. The source-drain metal layer SD includes a power signal line VDD extending along the second direction Y. The positive projection of the third pixel opening PK3 on the base substrate 200 is located within the positive projection of the power signal line VDD on the base substrate 200. The size of the power signal line VDD along the first direction X is larger than the size of the third pixel opening PK3 along the first direction X. The third sub-pixel SP3 can be set on a side of the power signal line VDD away from the base substrate 200. The third sub-pixel SP3 is padded by the power signal line VDD with a wider line width to ensure the flatness of the third sub-pixel SP3, thereby effectively avoiding the problem of color deviation of the third sub-pixel SP3.

[0115] It should be noted that the power signal line VDD can be configured to connect the first power signal to the first electrode of the light-emitting device, and the first power signal is a high-level signal. The line width of the power signal line VDD is set to be wider, so as to effectively reduce the voltage drop generated by the transmission of the first power signal in the power signal line VDD. Based on this, considering that the size of the third sub-pixel SP3 along the first direction X is small, the third sub-pixel SP3 is in the shape of a long strip extending along the second direction Y, and is more prone to color deviation than the first sub-pixel and the second sub-pixel, the flatness of the third sub-pixel SP3 can be ensured by padding the third sub-pixel SP3 using the power signal line VDD.

[0116] Fig.10 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0117] According to some exemplary embodiments, in combination with reference Figure 6 and Fig.10 The display substrate includes a driving circuit layer 300 located on a base substrate 200 and a light emitting device layer 400 located on a side of the driving circuit layer 300 away from the base substrate 200, the driving circuit layer 300 includes a source-drain metal layer SD closest to the light emitting device layer 400, the source-drain metal layer SD includes a data signal line Data extending along a second direction Y, the orthographic projection of the third pixel opening PK3 on the base substrate 200 partially overlaps with the orthographic projection of the data signal line Data on the base substrate 200, and the geometric center PC3 of the orthographic projection of the third pixel opening PK3 on the base substrate 200 is located within the orthographic projection of the data signal line Data on the base substrate 200. The size of the data signal line Data along the first direction X is smaller than the size of the third pixel opening PK3 along the first direction X. Therefore, the data signal line Data cannot completely lift the third sub-pixel SP3. The geometric center PC3 of the orthographic projection of the third pixel opening PK3 on the substrate 200 is located within the orthographic projection of the data signal line Data on the substrate 200. The symmetry of the third sub-pixel SP3 along the first direction X can be basically guaranteed, thereby effectively avoiding the color deviation problem of the third sub-pixel SP3.

[0118] Fig.11 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0119] According to some exemplary embodiments, in combination with reference Figure 6 and Fig.11The display substrate includes a driving circuit layer 300 located on a base substrate 200 and a light emitting device layer 400 located on a side of the driving circuit layer 300 away from the base substrate 200. The driving circuit layer 300 includes a source-drain metal layer SD closest to the light emitting device layer 400. The source-drain metal layer SD includes a data signal line Data extending along a second direction Y and a blank line DL extending along the second direction Y. A first portion PK31 of an orthographic projection of the third pixel opening PK3 on the base substrate 200 overlaps with an orthographic projection of the data signal line Data on the base substrate 200, and a second portion PK32 of an orthographic projection of the third pixel opening PK3 on the base substrate 200 overlaps with an orthographic projection of the blank line DL on the base substrate 200. The first portion PK31 and the second portion PK32 are respectively located on both sides of a geometric center PC3 of an orthographic projection of the third pixel opening PK3 on the base substrate 200 along the first direction X. According to this configuration, the two sides of the third sub-pixel SP3 along the first direction X are padded by the data signal line Data and the blank line DL respectively, thereby ensuring the symmetry of the third sub-pixel SP3 along the first direction X, thereby effectively avoiding the color shift problem of the third sub-pixel SP3.

[0120] It should be noted that the blank line DL does not receive any signal, so it is not suitable to set it too long, and the length of the blank line DL along the second direction Y can be slightly greater than the length of the third pixel opening PK3 along the second direction Y. In other words, multiple blank lines DL are arranged along the second direction Y at intervals.

[0121] According to some exemplary embodiments, a size of the blank line DL along the first direction X is substantially equal to a size of the data signal line Data along the first direction X, so as to ensure symmetry of the third sub-pixel SP3 along the first direction X.

[0122] According to some exemplary embodiments, the spacing between the geometric center PC3 of the orthographic projection of the third pixel opening PK3 on the substrate substrate 200 and the orthographic projection of the overlapping data signal line Data on the substrate substrate 200 is substantially equal to the spacing between the geometric center PC3 of the orthographic projection of the third pixel opening PK3 on the substrate substrate 200 and the orthographic projection of the overlapping blank trace DL on the substrate substrate 200.

[0123] It should be noted that the two dimensions involved in the embodiments of the present disclosure being substantially equal should be understood as the deviation of one dimension from the other dimension being within ±10%.

[0124] Fig.12 The plan view schematically shows a combination of a third pixel opening and a driving circuit layer of some display substrates according to embodiments of the present disclosure.

[0125] According to some exemplary embodiments, the display substrate includes a driving circuit layer 300 located on a base substrate 200 and a light emitting device layer 400 located on a side of the driving circuit layer 300 away from the base substrate 200, the driving circuit layer 300 includes a source-drain metal layer SD closest to the light emitting device layer 400, the source-drain metal layer SD includes a plurality of signal lines SL, the plurality of signal lines SL extend along a second direction Y and are arranged along a first direction X, and the orthographic projection of the third pixel opening PK3 on the base substrate 200 is located between the orthographic projections of two adjacent signal lines SL on the base substrate 200. Since the size of the third pixel opening PK3 along the first direction X is small, the third pixel opening PK3 can be set between the two adjacent signal lines SL, that is, the third sub-pixel SP3 is not padded by the signal lines SL in the source-drain metal layer SD, so that the flatness of the third sub-pixel SP3 can be ensured, and the problem of color deviation of the third sub-pixel SP3 can be effectively avoided.

[0126] According to some exemplary embodiments, the source-drain metal layer SD includes a plurality of signal lines SL, the plurality of signal lines SL include a plurality of power signal lines VDD and a plurality of data signal lines Data, and two data signal lines Data may be disposed between two adjacent power signal lines VDD. The orthographic projection of the third pixel opening PK3 on the substrate substrate 200 may be located between the orthographic projections of the adjacent power signal lines VDD and the data signal lines Data on the substrate substrate 200 ( Fig.12 This situation is schematically shown), or, the orthographic projection of the third pixel opening on the substrate can be located between the orthographic projections of two adjacent data signal lines on the substrate.

[0127] Figure 13A-13C The plan views of some mask plates according to embodiments of the present disclosure are schematically shown.

[0128] At least some embodiments of the present disclosure further provide a mask plate, which is used to manufacture the display substrate described in the above embodiments, and the mask plate includes a first sub-mask plate FMM1, a second sub-mask plate FMM2 and a third sub-mask plate FMM3. Figure 5 and Fig.13A The first mask plate FMM1 is used to manufacture the first sub-pixel SP1. The first mask plate FMM1 includes a plurality of first openings KK1 arranged in an array. The plurality of first openings KK1 are used to form the light-emitting layers of the plurality of first sub-pixels SP1 by evaporation. Figure 5 and Fig. 13B The second mask plate FMM2 is used to manufacture the second sub-pixel SP2. The second mask plate FMM2 includes a plurality of second openings KK2 arranged in an array. The plurality of second openings KK2 are used to form the light-emitting layers of the plurality of second sub-pixels SP2 by evaporation. Figure 5 and Fig. 13C The third sub-mask FMM3 is used to manufacture the third sub-pixel SP3. The third sub-mask FMM3 includes a plurality of third openings KK3 arranged in an array. The plurality of third openings KK3 are used to form the light-emitting layers of the plurality of third sub-pixels SP3 by evaporation. Since the area of ​​the third pixel opening PK3 is smaller than the area of ​​the first pixel opening PK1 and the area of ​​the second pixel opening PK2, the area of ​​the third opening KK3 is smaller than the area of ​​the first opening KK1 and the area of ​​the third opening KK3 is smaller than the area of ​​the second opening KK2.

[0129] According to some exemplary embodiments, in combination with reference Figure 5 and Fig. 13C , the interval RH2 between two adjacent third openings KK3 along the second direction Y is greater than the second interval D2 between the adjacent first pixel opening PK1 and the second pixel opening PK2 along the second direction Y, so that in the formed display substrate, the first interval D1 between two adjacent third pixel openings PK3 along the second direction Y is greater than twice the second interval D2 between the first pixel opening PK1 and the adjacent second pixel opening PK2 along the second direction Y (refer to Figure 5 ), thereby achieving an increase in the aperture ratio of the display substrate. The following is a detailed description in conjunction with a specific display substrate.

[0130] Display substrates 1 to 4 were prepared, and the aperture ratio data of display substrates 1 to 4 were measured and calculated. The results are shown in Table 1.

[0131] Table 1

[0132] Display substrate 1 Display substrate 2 Display substrate 3 Display substrate 4 Rib(μm) 25(BB) 25(RR) 25(BB) 25(RR) Pixel Pitch(μm) 96.87 96.87 96.87 96.87 R:G:B 1∶1.2∶2.4 1∶1.2∶2.4 1∶1.2∶2.4 1∶1.2∶2.4 PDL Gap(μm) 18 18 20 20 RAR(%) 8.04 8.40 7.13 7.38 GAR(%) 9.65 10.00 8.56 8.79 BAR(%) 19.29 20.00 17.12 17.58 Total AR(%) 36.98 38.40 32.81 33.75

[0133] The pixel arrangement of the display substrate 1 and the display substrate 3 is as follows: Figure 2A As shown, that is, a plurality of blue sub-pixels are arranged in a row along the second direction, and a plurality of red sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. In the display substrate 1 and the display substrate 3, Rib represents the FMM used for evaporation to form the blue sub-pixels (such as Figure 3A As shown), the spacing between openings adjacent to each other along the second direction is the same as that along the second direction.

[0134] The pixel arrangement of the display substrate 2 and the display substrate 4 is as follows: Figure 5 As shown, that is, a plurality of red sub-pixels are arranged in a row along the second direction, and a plurality of blue sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. In the display substrate 2 and the display substrate 4, Rib represents the FMM used for evaporation to form the red sub-pixels (such as Fig. 13C As shown), the spacing along the second direction between the third openings adjacent to each other along the second direction.

[0135] Pixel Pitch represents the size of a pixel unit, which can be understood as the distance between a specific point in one pixel unit and the same point in another pixel unit among two pixel units adjacent along a first direction, or can also be understood as the distance between a specific point in one pixel unit and the same point in another pixel unit among two pixel units adjacent along a second direction.

[0136] The PDL Gap should be understood as the width of the pixel defining layer between adjacent sub-pixels of different colors, that is, the spacing between the pixel openings of adjacent sub-pixels of different colors.

[0137] In the display substrate 1 and the display substrate 3, the PDL Gap may be the spacing between the pixel opening of the red sub-pixel and the pixel opening of the adjacent green sub-pixel along the second direction, or may be the spacing between the pixel opening of the red sub-pixel and the pixel opening of the adjacent blue sub-pixel along the first direction, or may be the spacing between the pixel opening of the green sub-pixel and the pixel opening of the adjacent blue sub-pixel along the first direction. In addition, the spacing between the openings of two adjacent blue sub-pixels along the second direction is substantially equal to the sum of the PDL Gap and Rib(BB).

[0138] In the display substrate 2 and the display substrate 4, the PDL Gap may be the spacing between the pixel opening of the blue sub-pixel and the pixel opening of the adjacent green sub-pixel along the second direction, or may be the spacing between the pixel opening of the red sub-pixel and the pixel opening of the adjacent blue sub-pixel along the first direction, or may be the spacing between the pixel opening of the red sub-pixel and the pixel opening of the adjacent green sub-pixel along the first direction. In addition, the spacing between the openings of two adjacent red sub-pixels along the second direction is substantially equal to the sum of the PDL Gap and Rib(RR).

[0139] R:G:B represents the area ratio of the pixel opening of the red sub-pixel, the pixel opening of the green sub-pixel and the pixel opening of the blue sub-pixel. RAR (%) represents the percentage of the pixel opening area of ​​the red sub-pixel to the total area of ​​the pixel unit, GAR (%) represents the percentage of the pixel opening area of ​​the green sub-pixel to the total area of ​​the pixel unit, BAR (%) represents the percentage of the pixel opening area of ​​the blue sub-pixel to the total area of ​​the pixel unit, and Total AR (%) represents the percentage of the sum of the pixel opening area of ​​the red sub-pixel, the pixel opening area of ​​the green sub-pixel and the pixel opening area of ​​the blue sub-pixel to the total area of ​​the pixel unit, that is, the total aperture ratio of the display substrate.

[0140] By comparing the data of display substrate 1 and display substrate 2, or comparing the data of display substrate 3 and display substrate 4, it can be known that when Rib, Pixel Pitch, R: G: B and PDL Gap are constant, the pixel arrangement of the display substrate is Figure 2A Change to Figure 5 As shown, the aperture ratio of the red sub-pixel, the aperture ratio of the green sub-pixel, the aperture ratio of the blue sub-pixel and the total aperture ratio are all improved. The total aperture ratio of display substrate 2 is increased by 1.42% compared with the total aperture ratio of display substrate 1, and the total aperture ratio of display substrate 4 is increased by 0.94% compared with the total aperture ratio of display substrate 3. It can be verified that when Rib is greater than PDL Gap, the aperture ratio of the display substrate is improved, and the greater the difference between Rib and PDL Gap, the greater the improvement in the aperture ratio.

[0141] Display substrates 5 to 8 were prepared, and the aperture ratio data of display substrates 5 to 8 were measured and calculated. The results are shown in Table 2.

[0142] Table 2

[0143] Display substrate 5 Display substrate 6 Display substrate 7 Display substrate 8 Rib(μm) 25(BB) 25(RR) 25(BB) 25(RR) Pixel Pitch(μm) 113.4 113.4 113.4 113.4 R:G:B 1∶3.1∶4.8 1∶3.1∶4.8 1∶3.1∶4.8 1∶3.1∶4.8 PDL Gap(μm) 18 18 20 20 RAR(%) 4.97 5.21 4.53 4.70 GAR(%) 15.40 16.03 14.04 14.46 BAR(%) 23.85 24.82 21.74 22.39 Total AR(%) 44.22 46.06 40.31 41.55

[0144] The pixel arrangement of the display substrate 5 and the display substrate 7 is as follows: Figure 2A That is to say, a plurality of blue sub-pixels are arranged in a row along the second direction, and a plurality of red sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. The pixel arrangement of the display substrate 6 and the display substrate 8 is shown in FIG. Figure 5 As shown, that is to say, a plurality of red sub-pixels are arranged in a row along the second direction, and a plurality of blue sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. In addition, the meanings of the relevant parameters in Table 2 can refer to the previous explanation of the relevant parameters in Table 1, and will not be repeated here.

[0145] By comparing the data of display substrate 5 and display substrate 6, or comparing the data of display substrate 7 and display substrate 8, it can be known that when Rib, Pixel Pitch, R∶G∶B and PDL Gap are constant, the pixel arrangement of the display substrate is Figure 2A Change to Figure 5 As shown, the aperture ratio of the red sub-pixel, the aperture ratio of the green sub-pixel, the aperture ratio of the blue sub-pixel and the total aperture ratio are all improved. The total aperture ratio of display substrate 6 is increased by 1.84% compared with the total aperture ratio of display substrate 5, and the total aperture ratio of display substrate 8 is increased by 1.24% compared with the total aperture ratio of display substrate 7. It can be verified that when Rib is greater than PDL Gap, the aperture ratio of the display substrate is improved, and the greater the difference between Rib and PDL Gap, the greater the improvement in the aperture ratio.

[0146] Display substrates 9 to 12 were prepared, and the aperture ratio data of display substrates 9 to 12 were measured and calculated. The results are shown in Table III.

[0147] Table 3

[0148] Display substrate 9 Display substrate 10 Display substrate 11 Display substrate 12 Rib(μm) 40(BB) 40(RR) 40(BB) 40(RR) Pixel Pitch(μm) 113.4 113.4 113.4 113.4 R:G:B 1∶3.1∶4.8 1∶3.1∶4.8 1∶3.1∶4.8 1∶3.1∶4.8 PDL Gap(μm) 18 18 20 20 RAR(%) 4.31 5.04 3.92 4.55 GAR(%) 13.36 15.52 12.14 13.99 BAR(%) 20.69 24.02 18.80 21.66 Total AR(%) 38.36 44.58 34.86 40.20

[0149] The pixel arrangement of the display substrate 9 and the display substrate 11 is as follows: Figure 2A That is to say, a plurality of blue sub-pixels are arranged in a row along the second direction, and a plurality of red sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. The pixel arrangement of the display substrate 6 and the display substrate 8 is shown in FIG. Figure 5 As shown, that is to say, a plurality of red sub-pixels are arranged in a row along the second direction, and a plurality of blue sub-pixels and a plurality of green sub-pixels are alternately arranged in a row along the second direction. In addition, the meanings of the relevant parameters in Table 3 can refer to the previous explanation of the relevant parameters in Table 1, and will not be repeated here.

[0150] By comparing the data of display substrate 9 and display substrate 10, or by comparing the data of display substrate 11 and display substrate 12, it can be known that when Rib, Pixel Pitch, R:G:B and PDL Gap are constant, the pixel arrangement of the display substrate is Figure 2A Change to Figure 5 As shown, the aperture ratio of the red sub-pixel, the aperture ratio of the green sub-pixel, the aperture ratio of the blue sub-pixel and the total aperture ratio are all improved. The total aperture ratio of the display substrate 10 is increased by 6.22% compared with the total aperture ratio of the display substrate 9, and the total aperture ratio of the display substrate 12 is increased by 5.34% compared with the total aperture ratio of the display substrate 11. It can be verified that when Rib is greater than PDL Gap, the aperture ratio of the display substrate is improved, and the greater the difference between Rib and PDL Gap, the greater the improvement in the aperture ratio.

[0151] In addition, by comparing the data of display substrate 6 and display substrate 10, or comparing the data of display substrate 8 and display substrate 12, it can be learned that under certain conditions of Pixel Pitch, R∶G∶B, PDL Gap and pixel arrangement, reducing Rib can increase the total aperture ratio of the display substrate, but when Rib is smaller, due to the manufacturing process of FMM, the larger the Shadow Height at Rib, the larger the PDL Gap at Rib, which will cause the total aperture ratio of the display substrate to decrease. Therefore, it is necessary to specifically design the value of Rib to balance the aperture ratio losses caused by the values ​​of Rib and PDL, thereby ensuring that the display substrate has a higher aperture ratio.

[0152] For example, when the FMM thickness is 25μm, the Rib can be set to 40μm and the Shadow Height at the Rib can be set to 4μm. Alternatively, the Rib can be set to 25μm and the Shadow Height at the Rib can be set to 6μm. Alternatively, the Rib can be set to 19μm and the Shadow Height at the Rib can be set to 8μm.

[0153] At least some embodiments of the present disclosure also provide a display device, which includes a display substrate as described above. The display device may include any device or product having a display function. For example, the display device may be a smart phone, a mobile phone, an e-book reader, a desktop computer (PC), a laptop PC, a netbook PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a digital audio player, a mobile medical device, a camera, a wearable device (such as a head-mounted device, an electronic clothing, an electronic bracelet, an electronic necklace, an electronic accessory, an electronic tattoo, or a smart watch), a television, etc.

[0154] As used herein, the terms "substantially," "approximately," "approximately," and other similar terms are used as terms of approximation rather than as terms of degree, and they are intended to account for the inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. Taking into account factors such as process fluctuations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), "approximately" or "approximately" as used herein include the stated value and mean that the particular value is within an acceptable range of deviation as determined by one of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within ±10% or ±5% of the stated value.

[0155] Although some embodiments according to the general inventive concept of the present disclosure have been illustrated and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display substrate, wherein: The display substrate comprises: a substrate substrate; and A plurality of sub-pixels are located on the substrate, the plurality of sub-pixels include a plurality of first sub-pixel columns and a plurality of second sub-pixel columns, the plurality of first sub-pixel columns and the plurality of second sub-pixel columns are alternately arranged along a first direction, the first sub-pixel column includes a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels and the plurality of second sub-pixels are alternately and alternately arranged along a second direction, the first direction and the second direction intersect, the second sub-pixel column includes a plurality of third sub-pixels, the plurality of third sub-pixels are alternately arranged along the second direction, Among them, the first sub-pixel has a first pixel opening, the second sub-pixel has a second pixel opening, and the third sub-pixel has a third pixel opening, the area of ​​the orthographic projection of the third pixel opening on the substrate is smaller than the area of ​​the orthographic projection of the first pixel opening on the substrate, and the area of ​​the orthographic projection of the third pixel opening on the substrate is smaller than the area of ​​the orthographic projection of the second pixel opening on the substrate.

2. The display substrate according to claim 1, wherein: A size of the third pixel opening along the first direction is smaller than a size of the third pixel opening along the second direction.

3. The display substrate according to claim 2, wherein: A size of the third pixel opening along the first direction is less than or equal to half of a size of the third pixel opening along the second direction.

4. The display substrate according to any one of claims 1 to 3, wherein: The size of the third pixel opening along the first direction is smaller than the size of the first pixel opening along the first direction; and / or, A size of the third pixel opening along the first direction is smaller than a size of the second pixel opening along the first direction.

5. The display substrate according to claim 4, wherein: The size of the third pixel opening along the first direction is smaller than half of the size of the first pixel opening along the first direction; and / or, A size of the third pixel opening along the first direction is smaller than half a size of the second pixel opening along the first direction.

6. The display substrate according to any one of claims 1 to 5, wherein: The size of the third pixel opening along the second direction is greater than the size of the first pixel opening along the second direction; and / or, A size of the third pixel opening along the second direction is greater than a size of the second pixel opening along the second direction.

7. The display substrate according to any one of claims 1 to 6, wherein: The size of the first pixel opening along the first direction is greater than or equal to the size of the first pixel opening along the second direction; and / or, A size of the second pixel opening along the first direction is greater than or equal to a size of the second pixel opening along the second direction.

8. The display substrate according to any one of claims 1 to 7, wherein: The spacing between two adjacent third pixel openings along the second direction is a first spacing, the spacing between the first pixel opening and the adjacent second pixel opening along the second direction is a second spacing, and the second spacing is less than half of the first spacing.

9. The display substrate according to any one of claims 1 to 8, wherein: The third sub-pixel is a red sub-pixel, the first sub-pixel is a green sub-pixel, and the second sub-pixel is a blue sub-pixel.

10. The display substrate according to any one of claims 1 to 9, wherein: The ratio of the first pixel opening area to the third pixel opening area is greater than 1 and less than or equal to 4; and / or, A ratio of the second pixel opening area to the third pixel opening area is greater than or equal to 1.5 and less than or equal to 5.

11. The display substrate according to any one of claims 1 to 10, wherein: In the first subpixel and the second subpixel adjacent to each other along the second direction and the third subpixel adjacent to the first subpixel and the second subpixel along the first direction, the geometric center of the orthographic projection of the first pixel opening on the substrate is the first center, the geometric center of the orthographic projection of the second pixel opening on the substrate is the second center, and the geometric center of the orthographic projection of the third pixel opening on the substrate is the third center, and the third center is located on the side of the midpoint of the line connecting the first center and the second center that is closer to the second center.

12. The display substrate according to claim 11, wherein: A side of the third pixel opening away from the first sub-pixel along the second direction is substantially flush with a side of the second pixel opening away from the first sub-pixel along the first direction.

13. The display substrate according to any one of claims 1 to 10, wherein: In the first subpixel and the second subpixel adjacent to each other along the second direction and the third subpixel adjacent to the first subpixel and the second subpixel along the first direction, the geometric center of the orthographic projection of the first pixel opening on the substrate is the first center, the geometric center of the orthographic projection of the second pixel opening on the substrate is the second center, and the geometric center of the orthographic projection of the third pixel opening on the substrate is the third center, and the third center is located on the side of the midpoint of the line connecting the first center and the second center that is closer to the first center.

14. The display substrate according to claim 13, wherein: A side of the third pixel opening away from the second sub-pixel along the second direction is substantially flush with a side of the first pixel opening away from the second sub-pixel along the first direction.

15. The display substrate according to any one of claims 1 to 14, wherein: The display substrate includes a driving circuit layer located on the base substrate and a light-emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer includes a source-drain metal layer closest to the light-emitting device layer, the source-drain metal layer includes a power signal line extending along the second direction, and the orthographic projection of the third pixel opening on the base substrate is located within the orthographic projection of the power signal line on the base substrate.

16. The display substrate according to any one of claims 1 to 14, wherein: The display substrate comprises a driving circuit layer located on the base substrate and a light emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer comprises a source-drain metal layer closest to the light emitting device layer, and the source-drain metal layer comprises a data signal line extending along the second direction; and The orthographic projection of the third pixel opening on the base substrate partially overlaps with the orthographic projection of the data signal line on the base substrate, and the geometric center of the orthographic projection of the third pixel opening on the base substrate is located within the orthographic projection of the data signal line on the base substrate.

17. The display substrate according to any one of claims 1 to 14, wherein: The display substrate comprises a driving circuit layer located on the base substrate and a light emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer comprises a source-drain metal layer closest to the light emitting device layer, and the source-drain metal layer comprises a data signal line extending along the second direction and a blank line extending along the second direction; A first portion of an orthographic projection of the third pixel opening on the substrate overlaps with an orthographic projection of the data signal line on the substrate, and a second portion of an orthographic projection of the third pixel opening on the substrate overlaps with an orthographic projection of the blank line on the substrate; as well as The first portion and the second portion are respectively located on two sides of a geometric center of an orthographic projection of the third pixel opening on the base substrate along the first direction.

18. The display substrate according to any one of claims 1 to 14, wherein: The display substrate comprises a driving circuit layer located on the base substrate and a light emitting device layer located on a side of the driving circuit layer away from the base substrate, the driving circuit layer comprises a source-drain metal layer closest to the light emitting device layer, the source-drain metal layer comprises a plurality of signal wirings, the plurality of signal wirings extend along the second direction and are arranged along the first direction; and The orthographic projection of the third pixel opening on the base substrate is located between the orthographic projections of two adjacent signal wirings on the base substrate.

19. A display device, wherein: The display device comprises the display substrate according to any one of claims 1-18.

20. A mask plate, wherein: The mask plate is used to manufacture a display substrate according to any one of claims 1 to 18, and the mask plate comprises: A first sub-mask plate, used for manufacturing the first sub-pixel, wherein the first sub-mask plate comprises a plurality of first openings arranged in an array; a second sub-mask plate, used for manufacturing the second sub-pixel, the second sub-mask plate comprising a plurality of second openings arranged in an array; and The third sub-mask is used to make the third sub-pixel. The third sub-mask includes a plurality of third openings arranged in an array. The area of ​​the third openings is smaller than that of the first openings and the area of ​​the third openings is smaller than that of the second openings.

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