Pixel structure and fine metal mask plate group

Abstract

The invention discloses a pixel structure and a fine metal mask plate group. The pixel structure comprises at least one pixel group, in each pixel group, gaps are formed among a first color light-emitting layer, a second color light-emitting layer and a third color light-emitting layer which are adjacent, the shape of the first color light-emitting layer comprises a first rounded rectangle and first protruding parts which are located at the rounded corners of the first rounded rectangle and protrude towards the gaps, and the shape of the second color light-emitting layer comprises a second rounded rectangle and second protruding parts which are located at the rounded corners of the second rounded rectangle. The first protruding part at least partially protrudes out of the extension line, close to the straight edge of the second color light-emitting layer, of the first rounded rectangle. Therefore, the pixel structure can reduce or even avoid bad risks of color mixing, color cast and the like, and the yield is improved.

Description

[0001] This application is a divisional application of a Chinese invention patent application (Application No.: 201811460115.3, Application Date: November 30, 2018, Invention Title: Pixel Structure and Fine Metal Mask Set). Technical Field

[0002] Embodiments of the present disclosure relate to a pixel structure and a fine metal mask set. Background Art

[0003] With the continuous development of display technology, organic light emitting diode display devices (OLEDs) have become the mainstream direction in the display field due to advantages such as self-luminescence, vivid colors, low power consumption, and wide viewing angles, and have gradually become a research hotspot for major manufacturers.

[0004] Currently, the mainstream manufacturing process of organic light emitting diode display devices is to use a fine metal mask (FMM) to evaporate the light emitting layer of the pixel structure of the organic light emitting diode. For example, an organic light emitting diode display device may include sub-pixels of three colors, and the manufacturing process of the organic light emitting diode display device may use three fine metal masks to separately prepare these three colors of sub-pixels. Summary of the Invention

[0005] Embodiments of the present disclosure provide a pixel structure and a fine metal mask set. The pixel structure includes at least one pixel group, and each pixel group includes: a first color light emitting layer, two second color light emitting layers, and a third color light emitting layer. The first color light emitting layer and the third color light emitting layer are arranged along a first direction, the two second color light emitting layers are arranged along a second direction, and the connection line of the centers of the two second color light emitting layers intersects the connection line of the centers of the first color light emitting layer and the third color light emitting layer. In each pixel group, there is a gap between adjacent first color light emitting layer, second color light emitting layer, and third color light emitting layer. The shape of the first color light emitting layer includes a first rounded rectangle, and a first protrusion located at the rounded corner of the first rounded rectangle and protruding into the gap. The first protrusion at least partially protrudes beyond the extension line of the straight side of the first rounded rectangle close to the second color light emitting layer. Thus, the first color light emitting layer has a first protrusion protruding into the gap, which can, on the one hand, increase the utilization rate of the gap, and on the other hand, can also increase the distance (Margin) between the rounded edge of the first color light emitting layer and the corresponding rounded corner of the anode, thereby reducing or even avoiding the risk of adverse effects such as color mixing and color deviation, and improving the yield.

[0006] At least one embodiment of the present disclosure provides a pixel structure, which includes: at least one pixel group, and each pixel group includes: a first color light-emitting layer, two second color light-emitting layers, and a third color light-emitting layer. The first color light-emitting layer and the third color light-emitting layer are arranged along the first direction, the two second color light-emitting layers are arranged along the second direction, and the connection line of the centers of the two second color light-emitting layers intersects the connection line of the centers of the first color light-emitting layer and the third color light-emitting layer. In each pixel group, there is a gap between the adjacent first color light-emitting layer, the second color light-emitting layer, and the third color light-emitting layer. The shape of the first color light-emitting layer includes a first rounded rectangle and a first convex portion located at the rounded corner of the first rounded rectangle and protruding into the gap. The first convex portion at least partially protrudes beyond the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer.

[0007] For example, in the pixel structure provided by an embodiment of the present disclosure, in each pixel group, the shape of the second color light-emitting layer includes a second rounded rectangle, and the rounded corner of the second rounded rectangle close to the gap is a second convex portion. The range D of the distance between the two adjacent second convex portions of the two second color light-emitting layers is 14-20 micrometers.

[0008] For example, in the pixel structure provided by an embodiment of the present disclosure, in each pixel group, the shape of the third color light-emitting layer includes a third rounded rectangle and a third convex portion located at the rounded corner of the third rounded rectangle and protruding into the gap. The third convex portion at least partially protrudes beyond the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer.

[0009] For example, in the pixel structure provided by an embodiment of the present disclosure, the first convex portion is located within a first triangular region. One end of the first short side of the first triangular region is the midpoint of the connection line of the centers of the adjacent second color light-emitting layers, and it extends along the second direction into the gap with a length L1. One end of the second short side of the first triangular region is the end point of the first short side located in the gap, and the other end intersects the straight side of the first rounded rectangle close to the second color light-emitting layer with a length of R1, where L1 is greater than 4 micrometers and the range of R1 is 5-15 micrometers.

[0010] For example, in the pixel structure provided by an embodiment of the present disclosure, the distance between the end point of the second short side on the straight side of the first rounded rectangle close to the second color light-emitting layer and the midpoint of the straight side of the first rounded rectangle close to the second color light-emitting layer is greater than 5 micrometers.

[0011] For example, in the pixel structure provided in an embodiment of the present disclosure, the third protrusion is located within the second triangular region. One end of the third short side of the second triangular region is the midpoint of the connection line of the centers of the adjacent second color light-emitting layers, and extends along the second direction towards the gap with a length L2. One end of the fourth short side of the second triangular region is the endpoint of the third short side located in the gap, and the other end intersects the straight side of the third rounded rectangle close to the second color light-emitting layer, with a length of R2, where L2 is greater than 4 microns and the range of R2 is 5 - 15 microns.

[0012] For example, in the pixel structure provided in an embodiment of the present disclosure, the distance between the endpoint of the third short side on the straight side of the third rounded rectangle close to the second color light-emitting layer and the midpoint of the straight side of the third rounded rectangle close to the second color light-emitting layer is greater than 5 microns.

[0013] For example, in the pixel structure provided in an embodiment of the present disclosure, each of the pixel groups further includes: one first color anode, two second color anodes, and one third color anode, configured to drive one first color light-emitting layer, two second color light-emitting layers, and one third color light-emitting layer to emit light. The shape of the first color anode includes a fourth rounded rectangle, the shape of the second color anode includes a fifth rounded rectangle, the shape of the third color anode includes a sixth rounded rectangle. The shortest distance between the straight sides of the fourth rounded rectangle and the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the sixth rounded rectangle is P. The center of the fourth rounded rectangle is approximately located at the center of the first rounded rectangle, and the shortest distance between the straight sides of the fourth rounded rectangle and the first rounded rectangle is 1 / 2*P.

[0014] For example, in the pixel structure provided in an embodiment of the present disclosure, the shape of the first color anode further includes a fourth protrusion located at the rounded corner of the fourth rounded rectangle and protruding towards the gap, and at least a part of the fourth protrusion protrudes beyond the extension line of the straight side of the fourth rounded rectangle close to the second color light-emitting layer.

[0015] For example, in the pixel structure provided in an embodiment of the present disclosure, each of the pixel groups further includes: a first-color anode, two second-color anodes, and a third-color anode, which are respectively configured to drive a first-color light-emitting layer, two second-color light-emitting layers, and a third-color light-emitting layer to emit light. The shape of the first-color anode includes a fourth rounded rectangle, the shape of the second-color anode includes a fifth rounded rectangle, the shape of the third-color anode includes a sixth rounded rectangle. The shortest distance between the straight sides of the fourth rounded rectangle and the straight sides of the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the straight sides of the sixth rounded rectangle is P. The center of the fifth rounded rectangle is approximately located at the center of the second rounded rectangle, and the shortest distance between the straight sides of the fifth rounded rectangle and the straight sides of the second rounded rectangle is 1 / 2*P.

[0016] For example, in the pixel structure provided in an embodiment of the present disclosure, each of the pixel groups further includes: a first-color anode, two second-color anodes, and a third-color anode, which are respectively configured to drive a first-color light-emitting layer, two second-color light-emitting layers, and a third-color light-emitting layer to emit light. The shape of the first-color anode includes a fourth rounded rectangle, the shape of the second-color anode includes a fifth rounded rectangle, the shape of the third-color anode includes a sixth rounded rectangle. The shortest distance between the straight sides of the fourth rounded rectangle and the straight sides of the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the straight sides of the sixth rounded rectangle is P. The center of the sixth rounded rectangle is approximately located at the center of the third rounded rectangle, and the shortest distance between the straight sides of the sixth rounded rectangle and the straight sides of the third rounded rectangle is 1 / 2*P.

[0017] For example, in the pixel structure provided in an embodiment of the present disclosure, the shape of the third-color anode further includes a fifth protrusion located at the rounded corner of the sixth rounded rectangle and protruding into the gap, and at least a part of the fifth protrusion protrudes beyond the extension line of the straight side of the sixth rounded rectangle close to the second-color light-emitting layer.

[0018] For example, in the pixel structure provided in an embodiment of the present disclosure, the first direction and the second direction are perpendicular.

[0019] For example, in the pixel structure provided in an embodiment of the present disclosure, the shapes of the first-color light-emitting layer, the second-color light-emitting layer, and the third-color light-emitting layer are all axisymmetric figures.

[0020] At least one embodiment of the present disclosure further provides a fine metal mask group for vapor depositing the above pixel structure, including: a first mask, including a plurality of first openings, and each of the first openings is used to form the first-color light-emitting layer.

[0021] For example, in the fine metal mask group provided in an embodiment of the present disclosure, the shape of the first opening is substantially the same as the shape of the first color light-emitting layer.

[0022] For example, in the fine metal mask group provided in an embodiment of the present disclosure, in each of the pixel groups, the shape of the second color light-emitting layer includes a second rounded rectangle, and the rounded corner of the second rounded rectangle close to the gap is a second protruding portion. The range D of the distance between two adjacent second protruding portions of the two second color light-emitting layers is 14-20 micrometers. The fine metal mask group further includes: a second mask plate, including a plurality of second openings, and each of the second openings is used to form the second color light-emitting layer.

[0023] For example, in the fine metal mask group provided in an embodiment of the present disclosure, the shape of the second opening is substantially the same as the shape of the second color light-emitting layer. For example, in the fine metal mask group provided in an embodiment of the present disclosure, in each of the pixel groups, the shape of the third color light-emitting layer includes a third rounded rectangle and a third protruding portion located at the rounded corner of the third rounded rectangle and protruding toward the gap. The third protruding portion at least partially protrudes beyond the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer. The fine metal mask group further includes: a third mask plate, including a plurality of third openings, and each of the third openings is used to form the third color light-emitting layer.

[0024] For example, in the fine metal mask group provided in an embodiment of the present disclosure, the shape of the third opening is substantially the same as the shape of the third color light-emitting layer. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0026] Figure 1 It is a partial plan view of a pixel structure;

[0027] Figure 2 It is a partial schematic view of a fine metal mask;

[0028] Figure 3 It is a partial schematic view of another fine metal mask;

[0029] Figure 4 It is a partial schematic view of another fine metal mask;

[0030] Figure 5 It is a partial schematic view of a pixel structure provided according to an embodiment of the present disclosure;

[0031] Figure 6 Schematic diagram of the arrangement of a pixel structure provided according to an embodiment of the present disclosure;

[0032] Figure 7 Partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure;

[0033] Figure 8 Comparison diagram of a pixel structure and a normal pixel structure provided according to an embodiment of the present disclosure;

[0034] Figure 9 Partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure;

[0035] Figure 10 Partial schematic diagram of a first mask provided according to an embodiment of the present disclosure;

[0036] Figure 11 Partial schematic diagram of a second mask provided according to an embodiment of the present disclosure;

[0037] Figure 12 Partial schematic diagram of a third mask provided according to an embodiment of the present disclosure;

[0038] Figure 13 Comparison diagram of the first opening on the first mask and the opening on a normal mask provided according to an embodiment of the present disclosure;

[0039] Figure 14 Comparison diagram of the second opening on the second mask and the opening on a normal mask provided according to an embodiment of the present disclosure; and

[0040] Figure 15 Comparison diagram of the third opening on the third mask and the opening on a normal mask provided according to an embodiment of the present disclosure. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0042] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar words used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0043] Currently, in the process of evaporation deposition using a fine metal mask (FMM), in each sub-pixel, the distance (Margin) between the FMM opening and the edge of the anode is a key parameter to ensure the evaporation deposition yield. However, due to the influence of the manufacturing process, the actual distance between the rounded corner edge of the FMM opening and the edge of the anode in a general FMM cannot reach the theoretical design value. As a result, in an FMM group, the openings of different FMMs, that is, the gaps between adjacent different color light-emitting layers, are relatively large and not fully utilized, increasing the risk of defects such as color mixing and color deviation. Therefore, the inventors of this application thought of designing a new type of FMM and utilizing the above-mentioned gaps to make the distance (Margin) between the rounded corner edge of the FMM opening and the rounded corner edge of the anode larger, that is, compensating (increasing the size) the rounded corners of the above-mentioned FMM openings, thereby reducing or even avoiding the risk of defects such as color mixing and color deviation and improving the yield. It should be noted that the above-mentioned distance between the FMM opening and the anode edge refers to the distance between the edge of the positive projection of the FMM opening on the substrate carrying the anode and the edge of the anode, rather than the distance in three-dimensional space.

[0044] Figure 1 It is a partial plan view of a pixel structure. Figure 2 It is a partial schematic view of a fine metal mask; Figure 3 It is a partial schematic view of another fine metal mask; Figure 4 It is a partial schematic view of another fine metal mask. Figure 1 Shows sub-pixels of three colors, as Figure 1 shown, the pixel structure includes a first-color sub-pixel 10, including a first-color light-emitting layer 11 and a first-color anode 18; a second-color sub-pixel 20, including a second-color light-emitting layer 21 and a second-color anode 28; a third-color sub-pixel 30, including a third-color light-emitting layer 31 and a third-color anode 38. The first-color light-emitting layer 11 can be formed by evaporation deposition through a fine metal mask 70 as Figure 2 shown, and the shape of the first-color light-emitting layer 11 and as Figure 2The shapes of the openings 71 on the fine metal mask 70 shown are the same; the second color light-emitting layer 21 can be formed by evaporation through the fine metal mask 80 as shown in Figure 3 shown, and the shape of the second color light-emitting layer 21 is the same as the shape of the opening 81 on the fine metal mask 80 as shown in Figure 3 shown; the third color light-emitting layer 31 can be formed by evaporation through the fine metal mask 90 as shown in Figure 4 shown, and the shape of the third color light-emitting layer 31 is the same as the shape of the opening 91 on the fine metal mask 90 as shown in Figure 4 shown. As shown in Figure 1 shown, the gaps (as shown by the dashed boxes in Figure 1 ) between the adjacent first color light-emitting layer 11, second color light-emitting layer 21, and third color light-emitting layer 11 are large and not fully utilized. Additionally, Figure 1 also shows the positional relationship between the anode and the light-emitting layer in each sub-pixel. As shown in Figure 1 shown, the center of the first color anode 18 is set at the center of the first color light-emitting layer 11, the center of the second color anode 28 is set at the center of the second color light-emitting layer 21, and the center of the third color anode 38 is set at the center of the third color light-emitting layer 31. At this time, due to reasons such as the FMM manufacturing process, in a group of FMMs, the gaps between the openings of different FMMs, that is, between the first color light-emitting layer 11, second color light-emitting layer 21, and third color light-emitting layer 31, are large and not fully utilized, resulting in a reduction in the distance (Margin) between the rounded edges of the actually formed light-emitting layer and the edges of the corresponding anode, thereby increasing the risk of poor mixing of colors, color deviation, etc. at the positions of the rounded edges of the first color light-emitting layer 11, second color light-emitting layer 21, and third color light-emitting layer 31. Therefore, the inventors of the present application thought of: by designing a new type of FMM opening to fabricate the light-emitting layers of each sub-pixel, fully utilizing the gaps between the adjacent first color light-emitting layer 11, second color light-emitting layer 21, and third color light-emitting layer 11, and increasing the distance (Margin) between the rounded edges of the first color light-emitting layer 11, second color light-emitting layer 21, and third color light-emitting layer 11 and the rounded edges of the corresponding first color anode 18, second color anode 28, and third color anode 38, thereby reducing or even avoiding the risk of poor mixing of colors, color deviation, etc., and improving the yield.

[0045] Embodiments of the present disclosure provide a pixel structure and a fine metal mask group. The pixel structure includes at least one pixel group, and each pixel group includes: a first color light-emitting layer, two second color light-emitting layers, and a third color light-emitting layer. The first color light-emitting layer and the third color light-emitting layer are arranged along a first direction, the two second color light-emitting layers are arranged along a second direction, and the connection line of the centers of the two second color light-emitting layers intersects the connection line of the centers of the first color light-emitting layer and the third color light-emitting layer. In each pixel group, the adjacent first color light-emitting layer and the third color light-emitting layer are in contact, and there are gaps between the adjacent first color light-emitting layer, the second color light-emitting layer, and the third color light-emitting layer. The shape of the first color light-emitting layer includes a first rounded rectangle and a first protrusion located at the rounded corner of the first rounded rectangle and protruding into the gap. The first protrusion at least partially protrudes beyond the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer. Thus, the first color light-emitting layer has the first protrusion protruding into the gap, which can, on the one hand, increase the utilization rate of the gap, and on the other hand, can also increase the distance (Margin) between the rounded edge of the first color light-emitting layer and the corresponding rounded corner of the anode, thereby reducing or even avoiding the risk of defects such as color mixing and color deviation, and improving the yield.

[0046] Next, the pixel structure and the fine metal mask provided by the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0047] At least one embodiment of the present disclosure provides a pixel structure. Figure 5 It is a partial schematic diagram of a pixel structure provided according to an embodiment of the present disclosure. As Figure 5 shown, the pixel structure includes at least one pixel group 100. Each pixel group 100 includes a first color light-emitting layer 111, two second color light-emitting layers 121, and a third color light-emitting layer 131. The first color light-emitting layer 111 and the third color light-emitting layer 131 are arranged along a first direction, the two second color light-emitting layers 121 are arranged along a second direction, and the connection line of the centers (geometric centers) of the two second color light-emitting layers 121 intersects the connection line of the centers (geometric centers) of the first color light-emitting layer 111 and the third color light-emitting layer 131. For example, they are perpendicular to each other.

[0048] In each pixel group 100, the adjacent first color light-emitting layer 111 and the third color light-emitting layer 131 are in contact, and there is a gap 140 between the adjacent first color light-emitting layer 111, the second color light-emitting layer 121, and the third color light-emitting layer 131. As Figure 2As shown, in this pixel group 100, there are two gaps 140 between one first-color light-emitting layer 111, two second-color light-emitting layers 121, and one third-color light-emitting layer 131; the first-color light-emitting layer 111 includes a first rounded rectangle 112 and a first protruding portion 114 located at the rounded corners of the first rounded rectangle 112 and protruding toward the gap 140, and the first protruding portion 114 at least partially protrudes beyond the extension line of the straight side 113 of the first rounded rectangle 112 close to the second-color light-emitting layer 121. It should be noted that a rounded rectangle is a figure formed by rounding the four corners of a rectangle.

[0049] In the pixel structure provided by the embodiments of the present disclosure, in each pixel group, since the shape of the first-color light-emitting layer includes a first protruding portion located at the rounded corners of the first rounded rectangle and protruding toward the gap, and the first protruding portion at least partially protrudes beyond the extension line of the straight side of the first rounded rectangle close to the second-color light-emitting layer, compared with the conventional pixel structure, the first protruding portion of the first-color light-emitting layer occupies a part of the area of the gap, or in other words, reduces the area of the gap. Thus, on the one hand, the utilization rate of the gap can be increased, and on the other hand, the distance (Margin) between the rounded edges of the first-color light-emitting layer and the corresponding rounded edges of the anode can be increased, thereby reducing or even avoiding the risk of adverse effects such as color mixing and color deviation, and improving the yield.

[0050] For example, as Figure 5 shown, the adjacent first-color light-emitting layer 121 and the third-color light-emitting layer 131 are in contact. Of course, the embodiments of the present disclosure include but are not limited to this. Considering the manufacturing level of the evaporation process, the adjacent first-color light-emitting layer 121 and the third-color light-emitting layer 131 can also be arranged at intervals or overlapped.

[0051] For example, as Figure 5 shown, the first-color light-emitting layer 111 can be a red light-emitting layer, the second-color light-emitting layer 121 can be a green light-emitting layer, and the third-color light-emitting layer 131 can be a blue light-emitting layer.

[0052] For example, as Figure 5 shown, since the lifespan of the blue light-emitting layer 131 is relatively short, the area of the blue light-emitting layer 131 can be set to be larger, for example, larger than the areas of the red light-emitting layer 111 and the green light-emitting layer 121.

[0053] For example, in some examples, as Figure 5As shown, in each pixel group 100, the second-color light-emitting layer 121 includes a second rounded rectangle 122, and the rounded corner of the second rounded rectangle 122 close to the gap 140 is a second protrusion 114. The range of the shortest distance between the two second protrusions 114 of the two second-color light-emitting layers 121 is 14-20 micrometers, that is, the range D of the distance between the two adjacent second protrusions 114 of the two second-color light-emitting layers 121 is 14-20 micrometers. At this time, compared with the conventional pixel structure, the second protrusion of the second-color light-emitting layer also occupies a part of the area of the gap, or reduces the area of the gap. Thus, on the one hand, the utilization rate of the gap is further increased, and on the other hand, the distance (Margin) between the rounded edge of the second-color light-emitting layer and the rounded edge of the corresponding anode is further increased, so that the risk of adverse effects such as color mixing and color deviation can be further reduced or even avoided, and the yield can be improved. It should be noted that different from the first protrusion, the second protrusion does not protrude beyond the extension line of the straight edge of the second rounded rectangle.

[0054] For example, considering the existing manufacturing process level of the FMM, the range of the distance D between the two adjacent second protrusions 114 of the two second-color light-emitting layers 121 is 13-17 micrometers.

[0055] For example, the distance D between the two adjacent second protrusions 114 of the two second-color light-emitting layers 121 is 15 micrometers.

[0056] For example, in some examples, as Figure 5 As shown, in each pixel group 100, the third-color light-emitting layer 131 includes a third rounded rectangle 132 and a third protrusion 134 protruding from the rounded corner of the third rounded rectangle 132 towards the gap 140. The third protrusion 134 at least partially protrudes beyond the extension line of the straight edge 133 of the third rounded rectangle 132 close to the second-color light-emitting layer 121. Similar to the first protrusion, the third protrusion at least partially protrudes beyond the extension line of the straight edge of the third rounded rectangle close to the second-color light-emitting layer. Compared with the conventional pixel structure, the third protrusion of the third-color light-emitting layer occupies a part of the area of the gap, or reduces the area of the gap. Thus, on the one hand, the utilization rate of the gap is further increased, and on the other hand, the distance (Margin) between the rounded edge of the third-color light-emitting layer and the rounded edge of the corresponding anode is further increased, so that the risk of adverse effects such as color mixing and color deviation can be reduced or even avoided, and the yield can be improved.

[0057] For example, in some examples, as Figure 5As shown, the shapes of the first-color light-emitting layer 111, the second-color light-emitting layer 121, and the third-color light-emitting layer 131 are all axisymmetric figures. That is to say, although the above text only describes the shapes of the corners of the first-color light-emitting layer 111 close to the gap 140, the corners of the second-color light-emitting layer 121 close to the gap 140, and the corners of the third-color light-emitting layer 131 close to the gap 140, the other corners of the first-color light-emitting layer 111 have the same shape as the corners of the first-color light-emitting layer 111 close to the gap 140, the other corners of the second-color light-emitting layer 121 have the same shape as the corners of the second-color light-emitting layer 121 close to the gap 140, and the other corners of the third-color light-emitting layer 131 have the same shape as the corners of the third-color light-emitting layer 131 close to the gap 140.

[0058] For example, in some examples, such as Figure 5As shown, each pixel group 100 further includes a first color anode 118, two second color anodes 128, and a third color anode 138, which are respectively configured to cause a first color light-emitting layer 111, two second color light-emitting layers 121, and a third color light-emitting layer 131 to emit light as described above. For example, the first color anode 118, the two second color anodes 128, and the third color anode 138 are respectively disposed on a first color light-emitting layer 111, two second color light-emitting layers 121, and a third color light-emitting layer 131. In other words, one anode is correspondingly disposed on each light-emitting layer; the first color light-emitting layer 111, the first color anode 118, and other necessary layer structures (such as a cathode, a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer) can form a first color sub-pixel 111. For example, the first color anode 118 and the cathode disposed on both sides of the first color light-emitting layer 111 can drive the first color light-emitting layer 111 to emit light through an electric current. The second color light-emitting layer 121, the second color anode 128, and other necessary layer structures (such as a cathode, a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer) can form a second color sub-pixel 120. For example, the second color anode 128 and the cathode disposed on both sides of the second color light-emitting layer 121 can drive the second color light-emitting layer 121 to emit light through an electric current. The third color light-emitting layer 131, the first color anode 138, and other necessary layer structures (such as a cathode, a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer) can form a third color sub-pixel 130. For example, the third color anode 138 and the cathode disposed on both sides of the third color light-emitting layer 131 can drive the third color light-emitting layer 131 to emit light through an electric current. The shape of the first color anode 118 can be a fourth rounded rectangle 119, the shape of the second color anode 128 can be a fifth rounded rectangle 129, and the shape of the sixth color anode 138 can be a sixth rounded rectangle 139. The shortest distance between the straight sides of the fourth rounded rectangle 119 and the straight sides of the fifth rounded rectangle 129 is P, and the shortest distance between the straight sides of the fifth rounded rectangle 129 and the straight sides of the sixth rounded rectangle 139 is P. That is, the distance (PDL gap) between the anodes of adjacent different sub-pixels in the straight side direction is P. At this time, the center of the fourth rounded rectangle 119 is approximately located at the center of the first rounded rectangle 112, for example, in the central region of the first rounded rectangle 112. The shortest distance between the straight sides of the fourth rounded rectangle 119 and the straight sides of the first rounded rectangle 112 is 1 / 2*P. That is to say, the first rounded rectangle 112 is a rounded rectangle formed by expanding the fourth rounded rectangle 119 by 1 / 2*P. It should be noted that in each sub-pixel, in order to clearly show the positional and dimensional relationship between the light-emitting layer and the anode, Figure 5 the anode in Figure 5 is disposed on the light-emitting layer. However, the vertical positional relationship between the light-emitting layer and the anode can be reversed, and the embodiments of the present disclosure do not limit this here; that is, the vertical positional relationship between the light-emitting layer and the anode can be set according to the actual situation.

[0059] For example, in some examples, such as Figure 5 As shown, the center of the fifth rounded rectangle 129 is approximately located at the center of the second rounded rectangle 122, for example, in the central region of the second rounded rectangle 112. The shortest distance between the straight sides of the fifth rounded rectangle 129 and the straight sides of the second rounded rectangle 122 is 1 / 2*P. That is to say, the second rounded rectangle 122 is a rounded rectangle formed by expanding the fifth rounded rectangle 129 by 1 / 2*P.

[0060] For example, in some examples, such as Figure 5 As shown, the center of the sixth rounded rectangle 139 is approximately located at the center of the third rounded rectangle 132, for example, in the central region of the third rounded rectangle 112. The shortest distance between the straight sides of the sixth rounded rectangle 139 and the straight sides of the third rounded rectangle 132 is 1 / 2*P. That is to say, the third rounded rectangle 132 is a rounded rectangle formed by expanding the sixth rounded rectangle 139 by 1 / 2*P.

[0061] Figure 6 It is a schematic diagram of the arrangement of a pixel structure provided according to an embodiment of the present disclosure. As Figure 6 shown, each pixel group 100 is a repeating unit. The pixel structure may include a plurality of pixel groups 100 arranged in two directions at an angle of 45 degrees with the first direction. Four sub-pixels in each pixel group 100 form two pixels. One of the two second color sub-pixels 120 (for example, a green sub-pixel) and one first color sub-pixel 110 (for example, a red sub-pixel) form a pixel, and the other of the two second color sub-pixels 120 and one third color sub-pixel 130 (for example, a blue sub-pixel) form a pixel. The first color sub-pixel 110 and the third sub-pixel 130 are shared by these two pixels respectively.

[0062] For example, in some examples, such as Figure 6As shown, multiple first-color sub-pixels 110, multiple second-color sub-pixels 120, and multiple third-color sub-pixels 130 can also be arranged as multiple first repeating units 101 and multiple second repeating units 102. Each first repeating unit 101 includes one first-color sub-pixel 110 (e.g., a red sub-pixel) and one second-color sub-pixel 120 (e.g., a green sub-pixel), and each second repeating unit 102 includes one third-color sub-pixel 130 (e.g., a blue sub-pixel) and one second-color sub-pixel 120 (a green sub-pixel). The multiple first repeating units 101 and the multiple second repeating units 102 are alternately arranged along a first direction and a second direction. The multiple first-color sub-pixels 110 and the multiple third-color sub-pixels 130 are alternately arranged along the first direction and the second direction, the multiple second-color sub-pixels 120 are arranged in an array along the first direction and the second direction, and every four second-color sub-pixels 120 surround one first-color sub-pixel 110 or third-color sub-pixel 130.

[0063] Figure 7 It is a partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure. As Figure 7 shown, the first protrusion 114 is located within the first triangular region 151. One end of the first short side 1511 of the first triangular region 151 is the midpoint of the connection line of the centers of the adjacent second-color light-emitting layers 121, and it extends along the second direction towards the gap 140 with a length L1. One end of the second short side 1512 of the first triangular region 151 is the end point of the first short side 1511 located in the gap 140, and the other end intersects the straight side 113 of the first rounded rectangle 112 close to the second-color light-emitting layer 121, and the length is R1. That is to say, one end of the second short side 1512 is the end point of the first short side 1511 located in the gap 140, and the other end is the intersection point of the circle with the end point of the first short side 1511 located in the gap 140 as the center and R1 as the radius and the straight side 113 of the first rounded rectangle 112 close to the second-color light-emitting layer 121. The above L1 is greater than 4 microns, and the range of R1 is 5 - 15 microns. At this time, the first protrusion has a good compensation effect on the rounded corner of the first-color light-emitting layer close to the gap, and at the same time, it can also take into account the existing FMM manufacturing process.

[0064] For example, the range of R1 can be 8 - 12 microns. For example, R1 can be 10 microns, so as to have a better compensation effect.

[0065] For example, in some examples, the distance between the end point of the second short side 1512 on the straight side 113 of the first rounded rectangle 112 close to the second-color light-emitting layer 121 and the midpoint of the straight side 113 of the first rounded rectangle 112 close to the second-color light-emitting layer 121 is greater than 5 microns.

[0066] For example, in some examples, as Figure 7As shown, the third convex portion 134 is located within the second triangular region 152. One end of the third short side 1523 of the second triangular region 152 is the midpoint of the connection line of the centers of the adjacent second color emission layers 121, and extends along the second direction towards the gap 140 with a length L2. One end of the fourth short side 1524 of the second triangular region 152 is the end point of the third short side 1523 located in the gap 140, and the other end intersects with the straight side 133 of the third rounded rectangle 132 close to the second color emission layer 121, and the length is R2. That is to say, one end of the fourth short side 1524 is the end point of the third short side 1523 located in the gap 140, and the other end is the intersection point of the circle with the end point of the third short side 1523 located in the gap 140 as the center and R2 as the radius and the straight side 133 of the third rounded rectangle 132 close to the second color emission layer 121. The above L2 is greater than 4 microns, and the range of R2 is 5 - 15 microns. At this time, the third convex portion has a good compensation effect on the rounded corner of the third color emission layer close to the gap, and at the same time, it can also take into account the existing FMM manufacturing process. For example, when manufacturing the FMM for evaporating the third color emission layer, the combination of the above second triangular region and the third rounded rectangle can be used as the FMM opening design scheme for manufacturing. For example, as Figure 7 shown, L1 can be equal to L2, and R1 can be equal to R2.

[0067] For example, the range of R2 can be 8 - 12 microns. For example, R2 can be 10 microns, so as to have a better compensation effect. For example, in some examples, as Figure 7 shown, the distance between the end point of the third short side 1523 on the straight side 133 of the third rounded rectangle 132 close to the second color emission layer 121 and the midpoint of the straight side 133 of the third rounded rectangle 132 close to the second color emission layer 121 is greater than 5 microns.

[0068] It should be noted that the above embodiments respectively propose improvements to the first color emission layer, the second color emission layer, and the third color emission layer. When the improvements to the first color emission layer, the second color emission layer, and the third color emission layer exist simultaneously, the pixel structure provided by the embodiments of the present disclosure has a high utilization rate of the gap, and can greatly reduce the probability of risks such as color mixing and color deviation, and improve the yield. Of course, the embodiments of the present disclosure include but are not limited to this, and improvements can also be made only to one or two of the first color emission layer, the second color emission layer, and the third color emission layer.

[0069] Figure 8 It is a comparison diagram of a pixel structure provided according to an embodiment of the present disclosure and a normal pixel structure. Figure 8 The solid lines in the figure are the rounded edges of the respective emission layers in the pixel structure provided by the embodiments of the present disclosure. Figure 8The dotted line in the middle is the rounded edge of each light-emitting layer in the conventional pixel structure. When ensuring that the size of the anode and the distance (PDL gap) between the anodes of adjacent different sub-pixels in the straight-edge direction are the same, as Figure 8 shown, the pixel structure provided by the embodiments of the present disclosure can significantly increase the distance (Margin) between the rounded edge of the first-color light-emitting layer 111 and the rounded edge of the first-color anode 118, the distance (Margin) between the rounded edge of the second-color light-emitting layer 121 and the rounded edge of the second-color anode 128, and the distance (Margin) between the rounded edge of the third-color light-emitting layer 131 and the rounded edge of the third-color anode 138. For example, the increment of the above-mentioned distance (Margin) is 1-2 μm, which is a significant increase compared to the conventional manufacturing process, thereby significantly reducing the probability of risks such as color mixing and color deviation, and improving the yield. Of course, the increment of the above-mentioned distance (Margin) is closely related to the relevant parameters of the sub-pixels, such as pixel size, PDL gap, and the opening area ratio of each sub-pixel. When the pixel size and the opening area ratio of each sub-pixel remain unchanged, the size of the PDL gap does not affect the Margin increment; when the opening area ratio of each sub-pixel and the PDL gap remain unchanged, the larger the pixel size, the larger the values of the above parameters such as D, R1, L1, R2, L2, etc. can be taken within the value range, and the compensation effect is more obvious. Of course, when the pixel size reaches a certain value, the compensation effect will not increase with the increase of the pixel size.

[0070] It should be noted that the pixel structure provided in this embodiment may not increase the distance (Margin) between the rounded edge of the first-color light-emitting layer and the rounded edge of the corresponding first-color anode, but instead correspondingly increase the size of the rounded corner of the first-color anode corresponding to the first-color light-emitting layer for the first protrusion, thereby increasing the aperture ratio of the first-color anode corresponding to the first-color light-emitting layer, and thus improving the product life. Similarly, the pixel structure provided in this embodiment may not increase the distance (Margin) between the rounded edge of the second-color light-emitting layer or the third-color light-emitting layer and the rounded edge of the corresponding second-color anode or third-color anode, but instead correspondingly increase the size of the rounded corner of the second-color anode or third-color anode for the second protrusion or the third protrusion, thereby increasing the aperture ratio of the second-color anode or third-color anode, and thus improving the product life. For example, Figure 9 is a schematic plan view of another pixel structure provided according to an embodiment of the present disclosure. As Figure 9 shown, the size of the rounded corner of the first-color anode 118 is correspondingly increased for the first protrusion 114, for example, extending towards the first protrusion 114, thereby increasing the aperture ratio of the first-color anode 118, and thus improving the product life. Similarly, as Figure 9As shown, the size of the rounded corners of the second color anode 128 or the third color anode 138 can also be correspondingly increased for the second protrusion 124 or the third protrusion 134, so as to increase the aperture ratio of the second color anode 128 or the third color anode 138, thereby improving the product life.

[0071] For example, in some examples, as Figure 9 shown, the shape of the first color anode 118 further includes a fourth protrusion 1185 located at the rounded corners of the fourth rounded rectangle 119 and protruding towards the gap 140. The fourth protrusion 1185 protrudes at least partially beyond the extension line of the straight side of the fourth rounded rectangle 119 close to the second color light-emitting layer 121, so as to increase the aperture ratio of the first color anode 118 and improve the product life.

[0072] For example, in some examples, as Figure 9 shown, the shape of the third color anode 138 further includes a fifth protrusion 1385 located at the rounded corners of the sixth rounded rectangle 139 and protruding towards the gap 140. The fifth protrusion 1385 protrudes at least partially beyond the extension line of the straight side of the sixth rounded rectangle 139 close to the second color light-emitting layer 121, so as to increase the aperture ratio of the first color anode 118 and improve the product life. The embodiment of the present disclosure also provides a fine metal mask group for vapor-depositing the pixel structure provided in the above embodiment. The fine metal mask group includes a first mask 310, Figure 10 which is a partial schematic diagram of a first mask provided according to an embodiment of the present disclosure. As Figure 10 shown, the first mask 310 includes a plurality of first openings 312, and each first opening 312 is used to form the first color light-emitting layer 111. For example, the shape of the first opening 312 is substantially the same as the shape of the first color light-emitting layer 111. That is, the first opening 312 may also include the first rounded rectangle and the first protrusion in the above embodiment, and the first protrusion protrudes at least partially beyond the extension line of the straight side of the first rounded rectangle.

[0073] For example, in some examples, the fine metal mask group includes a second mask 320, Figure 11 which is a partial schematic diagram of a second mask provided according to an embodiment of the present disclosure. As Figure 11 shown, the second mask 320 includes a plurality of second openings 322, and each second opening 322 is used to form the second color light-emitting layer 121. For example, the shape of the second opening 322 is substantially the same as the shape of the second color light-emitting layer 121.. That is, the second opening 322 may also be the second rounded rectangle in the above embodiment.

[0074] For example, in some examples, the fine metal mask group includes a third mask 330, Figure 12 which is a partial schematic diagram of a third mask provided according to an embodiment of the present disclosure. AsFigure 12 As shown, the third mask 330 includes a plurality of third openings 332, and each third opening 332 is used to form a third-color light-emitting layer 131. For example, the shape of the third opening 332 is substantially the same as the shape of the third-color light-emitting layer 131. That is, the third opening 332 may also include the third rounded rectangle and the third protrusion in the above embodiment, and at least part of the third protrusion protrudes from the extension line of the straight side of the third rounded rectangle.

[0075] For example, in some examples, the fine metal mask set includes the first mask 310, the second mask 320, and the third mask 330, which are used in combination so that the first-color light-emitting layer formed by evaporation using the first mask and the third-color light-emitting layer formed by evaporation using the third mask are arranged along the first direction, and the two second-color light-emitting layers formed by evaporation using the second mask are arranged along the second direction. The connection line of the two second-color light-emitting layers intersects the connection line of the first-color light-emitting layer and the third-color light-emitting layer, thereby forming a pixel group.

[0076] Figure 13 It is a comparison diagram of the first opening on the first mask and the opening on a conventional mask according to an embodiment of the present disclosure. Figure 13 The solid line in the figure is the rounded edge of the first opening on the first mask provided by the embodiment of the present disclosure. Figure 13 The dashed line in the figure is the rounded edge of the opening on a conventional mask. As Figure 13 shown, the distance (Margin) between the vertex of the rounded edge of the first opening 312 and the corresponding anode is 10.34 micrometers, while the distance between the rounded edge of the opening on a conventional mask and the corresponding anode is 9.33 micrometers. In addition, as Figure 13 shown, the maximum distance between the rounded edge of the first opening 312 and the rounded edge of the opening on a conventional mask is 1.51 micrometers.

[0077] Figure 14 It is a comparison diagram of the second opening on the second mask and the opening on a conventional mask according to an embodiment of the present disclosure. Figure 14 The solid line in the figure is the rounded edge of the second opening on the second mask provided by the embodiment of the present disclosure. Figure 14 The dashed line in the figure is the rounded edge of the opening on a conventional mask. As Figure 14 shown, the distance between the vertex of the rounded edge of the second opening 322 and the corresponding anode is 9.82 micrometers, while the distance between the rounded edge of the opening on a conventional mask and the corresponding anode is 8.5 micrometers.

[0078] Figure 15 It is a comparison diagram of the third opening on the first mask and the opening on a conventional mask according to an embodiment of the present disclosure. Figure 15The solid line in the figure is the rounded edge of the third opening on the third mask provided by the embodiment of the present disclosure. Figure 15 The dashed line in the figure is the rounded edge of the opening on a conventional mask. As Figure 15 shown, the distance between the vertex of the rounded edge of the third opening 332 and the corresponding anode is 10.34 micrometers, while the distance between the rounded edge of the opening on a conventional mask and the corresponding anode is 9.33 micrometers. In addition, the maximum distance between the rounded edge of the third opening 332 and the rounded edge of the opening on a conventional mask is 1.50 micrometers.

[0079] An embodiment of the present disclosure further provides a display device including the above pixel structure. The display device is an Organic Light-Emitting Diode (OLED) display device, and the display device can be applied to any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, etc. This embodiment is not limited thereto.

[0080] The following points need to be explained:

[0081] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the conventional designs.

[0082] (2) Without conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0083] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A pixel structure, comprising: At least one pixel group, each pixel group including: a first-color light-emitting layer, two second-color light-emitting layers, and a third-color light-emitting layer, the first-color light-emitting layer and the third-color light-emitting layer being arranged along the first direction, the two second-color light-emitting layers being arranged along the second direction, and the line connecting the centers of the two second-color light-emitting layers intersecting the line connecting the centers of the first-color light-emitting layer and the third-color light-emitting layer. Wherein, the edge of the first-color light-emitting layer includes a first straight edge, a second straight edge, and a convex edge connected to the first straight edge and the second straight edge, the convex edge protruding outward relative to a virtual rounded-corner edge, the virtual rounded-corner edge being formed by rounding the virtual corner formed by the extension lines of the first straight edge and the second straight edge, the virtual rounded-corner edge being tangent to the first straight edge and the second straight edge respectively, and the distance between the convex edge and the virtual rounded-corner edge being less than or equal to 1.51 micrometers.

2. The pixel structure according to claim 1, wherein, The convex edge includes a first sub-convex edge and a second sub-convex edge, the first sub-convex edge being connected to the first straight edge, the second sub-convex edge being connected to the second straight edge, and the first sub-convex edge and the second sub-convex edge being separated by a virtual straight line passing through the intersection point of the extension lines of the first straight edge and the second straight edge and the center of the first-color light-emitting layer. The first sub-convex edge and the virtual rounded-corner edge have a first distance in a direction perpendicular to the first straight edge, and the second sub-convex edge and the virtual rounded-corner edge have a second distance in a direction perpendicular to the second straight edge.

3. The pixel structure according to claim 2, wherein, Both the first distance and the second distance are less than or equal to 1.51 micrometers.

4. The pixel structure according to claim 2, wherein, The first distance first increases and then decreases from the position where the first convex edge is connected to the first straight edge, and the second distance first increases and then decreases from the position where the second convex edge is connected to the second straight edge.

5. The pixel structure according to claim 2, wherein, The first sub-convex edge and the second sub-convex edge are symmetric with respect to the virtual straight line.

6. The pixel structure according to claim 2, wherein, The distance between the intersection point of the first sub-convex edge and the second sub-convex edge and the virtual rounded-corner edge is less than the maximum distance between the convex edge and the virtual rounded-corner edge.

7. The pixel structure according to any one of claims 1-6, wherein, In each pixel group, there are gaps between the adjacent first-color light-emitting layer, the second-color light-emitting layer, and the third-color light-emitting layer. The shape of the first-color light-emitting layer includes a first rounded rectangle and a first convex portion located at the rounded corner of the first rounded rectangle and protruding into the gap, and the first convex portion at least partially protrudes beyond the extension line of the straight edge of the first rounded rectangle close to the second-color light-emitting layer.

8. The pixel structure according to claim 7, wherein, In each pixel group, the shape of the second-color light-emitting layer includes a second rounded rectangle, the rounded corner of the second rounded rectangle close to the gap being a second convex portion, the shape of the third-color light-emitting layer includes a third rounded rectangle, and a third convex portion located at the rounded corner of the third rounded rectangle and protruding into the gap, and the third convex portion at least partially protrudes beyond the extension line of the straight edge of the third rounded rectangle close to the second-color light-emitting layer.

9. The pixel structure according to claim 7, wherein, The first raised portion is located within the first triangular region. One end of the first short side of the first triangular region is the midpoint of the connection line of the centers of the adjacent second-color light-emitting layers, and extends along the second direction towards the gap with a length L1. One end of the second short side of the first triangular region is the end point of the first short side located at the gap, and the other end intersects with the straight side of the first rounded rectangle close to the second-color light-emitting layer, and has a length of R1, where L1 is greater than 4 microns, and the range of R1 is 5 - 15 microns.

10. The pixel structure according to claim 8, wherein, The third raised portion is located within the second triangular region. One end of the third short side of the second triangular region is the midpoint of the connection line of the centers of the adjacent second-color light-emitting layers, and extends along the second direction towards the gap with a length L2. One end of the fourth short side of the second triangular region is the end point of the third short side located at the gap, and the other end intersects with the straight side of the third rounded rectangle close to the second-color light-emitting layer, and has a length of R2, where L2 is greater than 4 microns, and the range of R2 is 5 - 15 microns.

11. The pixel structure according to any one of claims 1-6, wherein, Each of the pixel groups further includes: a first-color anode, two second-color anodes, and a third-color anode, which are respectively configured to drive one first-color light-emitting layer, two second-color light-emitting layers, and one third-color light-emitting layer to emit light. Wherein, the shape of the first-color anode includes a fourth rounded rectangle, and the shape of the first-color anode further includes a fourth raised portion located at the rounded corner of the fourth rounded rectangle and protruding towards the gap, and at least part of the fourth raised portion protrudes beyond the extension line of the straight side of the fourth rounded rectangle close to the second-color light-emitting layer.

12. The pixel structure according to claim 11, wherein, The shape of the second-color anode includes a fifth rounded rectangle, the shape of the third-color anode includes a sixth rounded rectangle, the shortest distance between the straight sides of the fourth rounded rectangle and the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the sixth rounded rectangle is P, the center of the fourth rounded rectangle is approximately located at the center of the first rounded rectangle, and the shortest distance between the straight sides of the fourth rounded rectangle and the first rounded rectangle is 1 / 2*P.

13. The pixel structure according to claim 8, wherein, Each of the pixel groups further includes: a first-color anode, two second-color anodes, and a third-color anode, which are respectively configured to drive one first-color light-emitting layer, two second-color light-emitting layers, and one third-color light-emitting layer to emit light. Wherein, the shape of the first-color anode includes a fourth rounded rectangle, the shape of the second-color anode includes a fifth rounded rectangle, the shape of the third-color anode includes a sixth rounded rectangle, the shortest distance between the straight sides of the fourth rounded rectangle and the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the sixth rounded rectangle is P, the center of the fifth rounded rectangle is located at the center of the second rounded rectangle, and the shortest distance between the straight sides of the fifth rounded rectangle and the second rounded rectangle is 1 / 2*P.

14. The pixel structure according to claim 8, wherein, Each of the pixel groups further includes: a first color anode, two second color anodes, and a third color anode, which are respectively configured to drive a first color light-emitting layer, two second color light-emitting layers, and a third color light-emitting layer to emit light. Among them, the shape of the first color anode includes a fourth rounded rectangle, the shape of the second color anode includes a fifth rounded rectangle, the shape of the third color anode includes a sixth rounded rectangle, the shortest distance between the straight sides of the fourth rounded rectangle and the straight sides of the fifth rounded rectangle is P, the shortest distance between the straight sides of the fifth rounded rectangle and the straight sides of the sixth rounded rectangle is P, the center of the sixth rounded rectangle is approximately located at the center of the third rounded rectangle, and the shortest distance between the straight sides of the sixth rounded rectangle and the straight sides of the third rounded rectangle is 1 / 2*P.

15. The pixel structure according to claim 14, wherein, The shape of the third color anode further includes a fifth protrusion located at the rounded corner of the sixth rounded rectangle and protruding into the gap, and at least part of the fifth protrusion protrudes beyond the extension line of the straight side of the sixth rounded rectangle close to the second color light-emitting layer.

16. A fine metal mask set for vapor depositing the pixel structure according to claim 1, comprising: A first mask plate, including a plurality of first openings, each of the first openings being used to form the first color light-emitting layer.

17. The fine metal mask set according to claim 16, wherein, The shape of the first opening is substantially the same as the shape of the first color light-emitting layer.

18. The fine metal mask set according to claim 16, wherein,In each of the pixel groups, the shape of the second color light-emitting layer includes a second rounded rectangle, and the rounded corner of the second rounded rectangle close to the gap is a second protrusion. The fine metal mask plate group further includes: A second mask plate, including a plurality of second openings, each of the second openings being used to form the second color light-emitting layer, and the shape of the second opening is substantially the same as the shape of the second color light-emitting layer.

19. The fine metal mask group according to any one of claims 16 - 18, wherein, In each of the pixel groups, the shape of the third color light-emitting layer includes a third rounded rectangle and a third protrusion located at the rounded corner of the third rounded rectangle and protruding into the gap, and at least part of the third protrusion protrudes beyond the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer. The fine metal mask plate group further includes: A third mask plate, including a plurality of third openings, each of the third openings being used to form the third color light-emitting layer.

20. The fine metal mask group according to claim 19, wherein, The shape of the third opening is substantially the same as the shape of the third color light-emitting layer.

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