Pixel structure and fine metal mask set

Abstract

A pixel structure and a fine metal mask set. The pixel structure includes at least one pixel group, in each pixel group, a gap is included between adjacent first color light-emitting layers, second color light-emitting layers and third color light-emitting layers, 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 toward the gap, and the first convex portion at least partially protrudes from the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer. As a result, the pixel structure can reduce or even avoid the risk of color mixing, color deviation and other defects, and improve the yield.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a pixel structure and a fine metal mask set. Background Art

[0002] With the continuous development of display technology, Organic Light Emitting Diode Display (OLED) has become the mainstream direction in the display field due to its advantages such as autonomous luminescence, bright colors, low power consumption and wide viewing angle, and has gradually become a research hotspot for major manufacturers.

[0003] At present, the mainstream manufacturing process of an organic light-emitting diode display device 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 prepare the sub-pixels of the three colors respectively. Summary of the invention

[0004] The disclosed embodiment provides a pixel structure and a fine metal mask group. The pixel structure includes at least one pixel group, 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, the line connecting the centers of the two second color light-emitting layers intersects with the line connecting 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 toward the gap, and the first convex portion at least partially protrudes from the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer. As a result, the first color light-emitting layer has a first convex portion protruding toward the gap, so that on the one hand, the utilization rate of the gap can be increased, and on the other hand, the distance (Margin) between the rounded edge of the first color light-emitting layer and the rounded corner of the corresponding anode can be increased, so that the risk of color mixing, color deviation and other defects can be reduced or even avoided, and the yield rate can be improved.

[0005] At least one embodiment of the present disclosure provides a pixel structure, which includes: at least one pixel group, each of the pixel groups 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, the line connecting the centers of the two second color light-emitting layers intersects with the line connecting the centers of the first color light-emitting layer and the third color light-emitting layer, in each of the pixel groups, there is a gap between adjacent first color light-emitting layers, the second color light-emitting layers and the third color light-emitting layers, 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 toward the gap, the first protrusion at least partially protruding from the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer.

[0006] For example, in the pixel structure provided in one 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, the rounded corners of the second rounded rectangle close to the gap are second protrusions, and the distance D between two adjacent second protrusions of two second color light-emitting layers is in the range of 14-20 microns.

[0007] For example, in the pixel structure provided in one 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 protrusion located at the rounded corners of the third rounded rectangle and protruding toward the gap, and the third protrusion at least partially protrudes from the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer.

[0008] For example, in a pixel structure provided in an embodiment of the present disclosure, the first protrusion is located in a first triangular area, one end of a first short side of the first triangular area is the midpoint of a line connecting the centers of adjacent second color light-emitting layers, and extends toward the gap along the second direction with a length of L1, one end of a second short side of the first triangular area is the end point of the first short side located in 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, wherein L1 is greater than 4 microns and R1 is in the range of 5-15 microns.

[0009] For example, in the pixel structure provided in one embodiment of the present disclosure, the distance between the endpoint 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 microns.

[0010] For example, in the pixel structure provided in one embodiment of the present disclosure, the third protrusion is located in the second triangular area, one end of the third short side of the second triangular area is the midpoint of the line connecting the centers of adjacent second color light-emitting layers, and extends toward the gap along the second direction with a length of L2, one end of the fourth short side of the second triangular area is the endpoint of the third short side located in 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, wherein L2 is greater than 4 microns and R2 is in the range of 5-15 microns.

[0011] For example, in the pixel structure provided in one 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.

[0012] For example, in the pixel structure provided in an embodiment of the present disclosure, each pixel group also includes: a first color anode, two second color anodes and one third color anode, which are 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side of 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 side of the fourth rounded rectangle and the straight side of the first rounded rectangle is 1 / 2*P.

[0013] For example, in a pixel structure provided in an embodiment of the present disclosure, the shape of the first color anode also includes a fourth protrusion located at the rounded corner of the fourth rounded rectangle and protruding toward the gap, and the fourth protrusion at least partially protrudes from the extension line of the straight side of the fourth rounded rectangle close to the second color light-emitting layer.

[0014] For example, in the pixel structure provided in an embodiment of the present disclosure, each pixel group also includes: a first color anode, two second color anodes and one 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, 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side 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 side of the fifth rounded rectangle and the straight side of the second rounded rectangle is 1 / 2*P.

[0015] For example, in the pixel structure provided in an embodiment of the present disclosure, each pixel group also includes: a first color anode, two second color anodes and one 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, 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side 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 side of the sixth rounded rectangle and the straight side of the third rounded rectangle is 1 / 2*P.

[0016] For example, in the pixel structure provided in one embodiment of the present disclosure, the shape of the third color anode also includes a fifth protrusion located at the rounded corner of the sixth rounded rectangle and protruding toward the gap, and the fifth protrusion at least partially protrudes from the extension line of the straight side of the sixth rounded rectangle close to the second color light-emitting layer.

[0017] For example, in a pixel structure provided by an embodiment of the present disclosure, the first direction is perpendicular to the second direction.

[0018] For example, in a 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.

[0019] At least one embodiment of the present disclosure further provides a fine metal mask set for evaporating the above-mentioned pixel structure, including: a first mask including a plurality of first openings, each of the first openings is used to form the first color light-emitting layer.

[0020] For example, in the fine metal mask set 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.

[0021] For example, in the fine metal mask template 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, the rounded corners of the second rounded rectangle close to the gap are second protrusions, and the distance D between two adjacent second protrusions of two second color light-emitting layers is in the range of 14-20 microns. The fine metal mask template group also includes: a second mask template, including multiple second openings, and each of the second openings is used to form the second color light-emitting layer.

[0022] For example, in the fine metal mask set 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 set 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 protrusion located at the rounded corner of the third rounded rectangle and protruding toward the gap, the third protrusion at least partially protruding from the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer, and the fine metal mask set further includes: a third mask, including a plurality of third openings, each of the third openings is used to form the third color light-emitting layer.

[0023] For example, in the fine metal mask set 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0025] Figure 1 is a local plan schematic diagram of a pixel structure;

[0026] Figure 2 A partial schematic diagram of a fine metal mask;

[0027] Figure 3 A partial schematic diagram of another fine metal mask;

[0028] Figure 4 A partial schematic diagram of another fine metal mask;

[0029] Figure 5 A partial schematic diagram of a pixel structure provided according to an embodiment of the present disclosure;

[0030] Figure 6 A schematic diagram of an arrangement of a pixel structure provided according to an embodiment of the present disclosure;

[0031] Figure 7 A partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure;

[0032] Figure 8 A comparison diagram of a pixel structure provided according to an embodiment of the present disclosure and a common pixel structure;

[0033] Fig. 9 A partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure;

[0034] Fig.10 A partial schematic diagram of a first mask provided according to an embodiment of the present disclosure;

[0035] Fig.11 A partial schematic diagram of a second mask provided according to an embodiment of the present disclosure;

[0036] Fig.12 A partial schematic diagram of a third mask provided according to an embodiment of the present disclosure;

[0037] Fig.13 A comparison diagram of a first opening on a first mask provided according to an embodiment of the present disclosure and an opening on a common mask;

[0038] Fig.14 A comparison diagram of a second opening on a second mask provided according to an embodiment of the present disclosure and an opening on a common mask; and

[0039] Fig.15 The figure is a comparison diagram between a third opening on a third mask provided according to an embodiment of the present disclosure and an opening on a common mask. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0042] At present, in the process of evaporation (FMM) using a fine metal mask, in each sub-pixel, the distance (Margin) between the FMM opening and the edge of the anode is a key parameter to ensure the yield of evaporation. However, due to the influence of the manufacturing process, the distance between the actual FMM opening rounded edge and the edge of the anode cannot reach the theoretical design value, resulting in a large gap between the openings of different FMMs in an FMM group, that is, the gap between adjacent light-emitting layers of different colors, which is not fully utilized, increasing the risk of color mixing, color deviation and other defects. Therefore, the inventor of the present application thought of: by designing a new type of FMM and using the above-mentioned gap, the distance (Margin) between the rounded edge of the manufactured FMM opening and the rounded edge of the anode is larger, that is, the rounded corner of the above-mentioned FMM opening is compensated (increased in size), thereby reducing or even avoiding the above-mentioned risks of color mixing, color deviation and other defects, and improving the yield. It should be noted that the distance between the above-mentioned FMM opening and the edge of the anode refers to the distance between the edge of the orthographic projection of the FMM opening on the substrate carrying the anode and the edge of the anode, not the distance in three-dimensional space.

[0043] Figure 1 A local plan schematic diagram of a pixel structure. Figure 2 A partial schematic diagram of a fine metal mask; Figure 3 A partial schematic diagram of another fine metal mask; Figure 4 A partial schematic diagram of another fine metal mask. Figure 1 Three color sub-pixels are shown, such as Figure 1 As 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; and 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 Figure 2 The fine metal mask 70 shown is formed by evaporation, and the shape of the first color light emitting layer 11 is as shown in FIG. Figure 2The shape of the opening 71 on the fine metal mask 70 shown in the figure is the same; the second color light emitting layer 21 can be formed by Figure 3 The fine metal mask 80 shown is formed by evaporation, and the shape of the second color light emitting layer 21 is as shown in FIG. Figure 3 The shape of the opening 81 on the fine metal mask 80 shown in the figure is the same; the third color light emitting layer 31 can be formed by Figure 4 The fine metal mask 90 shown in FIG. 1 is formed by evaporation, and the shape of the third color light emitting layer 31 is as shown in FIG. Figure 4 The shapes of the openings 91 on the fine metal mask 90 are the same. Figure 1 As shown, the gaps between the adjacent first color light-emitting layer 11, the second color light-emitting layer 21 and the third color light-emitting layer 11 (such as Figure 1 The dotted box in the middle is too large and is not fully utilized. Figure 1 The positional relationship between the anode and the light-emitting layer in each sub-pixel is also shown. Figure 1 As 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 the FMM manufacturing process and other reasons, the openings of different FMMs in one FMM group, that is, the gaps between the first color light-emitting layer 11, the second color light-emitting layer 21 and the third color light-emitting layer 31 are large and not fully utilized, so that the distance (Margin) between the rounded edge of the actually formed light-emitting layer and the edge of the corresponding anode is reduced, thereby increasing the risk of color mixing, color deviation and other defects at the rounded edges of the first color light-emitting layer 11, the second color light-emitting layer 21 and the third color light-emitting layer 31. Therefore, the inventor of the present application came up with the idea of ​​designing a new type of FMM opening to produce the light-emitting layer of each sub-pixel, making full use of the gaps between the adjacent first color light-emitting layer 11, the second color light-emitting layer 21 and the third color light-emitting layer 11, and increasing the distance (Margin) between the rounded edges of the first color light-emitting layer 11, the second color light-emitting layer 21 and the third color light-emitting layer 11 and the rounded edges of the corresponding first color anode 18, the second color anode 28 and the third color anode 38, thereby reducing or even avoiding the risk of color mixing, color deviation and other defects, and improving the yield.

[0044] The disclosed embodiment provides a pixel structure and a fine metal mask group. The pixel structure includes at least one pixel group, 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, the line connecting the centers of the two second color light-emitting layers intersects with the line connecting the centers of the first color light-emitting layer and the third color light-emitting layer, in each pixel group, adjacent first color light-emitting layers are connected to the third color light-emitting layer, adjacent first color light-emitting layers, second color light-emitting layers and third color light-emitting layers include gaps, 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 toward the gap, the first protrusion at least partially protrudes from 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 toward the gap, which can increase the utilization rate of the gap on the one hand, and increase the distance (Margin) between the rounded edge of the first color light-emitting layer and the rounded edge of the corresponding anode on the other hand, thereby reducing or even avoiding the risk of color mixing, color deviation and other defects and improving the yield.

[0045] The pixel structure and fine metal mask provided by the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0046] At least one embodiment of the present disclosure provides a pixel structure. Figure 5 FIG. 1 is a partial schematic diagram of a pixel structure provided according to an embodiment of the present disclosure. Figure 5 As 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 one 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, and the two second color light-emitting layers 121 are arranged along a second direction, and a line connecting the centers (geometric centers) of the two second color light-emitting layers 121 intersects with a line connecting 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.

[0047] In each pixel group 100, adjacent first color light emitting layers 111 and third color light emitting layers 131 are connected, and gaps 140 are included between adjacent first color light emitting layers 111, second color light emitting layers 121 and third color light emitting layers 131; Figure 2As shown, in the pixel group 100, there are two gaps 140 between 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 includes a first rounded rectangle 112, and a first protrusion 114 located at the rounded corner of the first rounded rectangle 112 and protruding toward the gap 140, and the first protrusion 114 at least partially protrudes from 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 the rounded rectangle is a figure formed by rounding the four corners of a rectangle.

[0048] In the pixel structure provided in the embodiment of the present disclosure, in each pixel group, since the shape of the first color light-emitting layer includes a first protrusion located at the rounded corner of the first rounded rectangle and protruding toward the gap, the first protrusion at least partially protrudes from the extension line of the straight side of the first rounded rectangle close to the second color light-emitting layer. Compared with the usual pixel structure, the first protrusion of the first color light-emitting layer occupies a part of the area of ​​the gap, or reduces the area of ​​the gap, thereby increasing the utilization rate of the gap on the one hand, and increasing the distance (Margin) between the rounded edge of the first color light-emitting layer and the rounded edge of the corresponding anode on the other hand, thereby reducing or even avoiding the risk of color mixing, color deviation and other defects and improving the yield.

[0049] For example, Figure 5 As shown, the adjacent first color light emitting layer 121 is connected to the third color light emitting layer 131. 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 spaced or overlapped.

[0050] For example, Figure 5 As shown, the first color light emitting layer 111 may be a red light emitting layer, the second color light emitting layer 121 may be a green light emitting layer, and the third color light emitting layer 131 may be a blue light emitting layer.

[0051] For example, Figure 5 As shown, since the life of the blue light-emitting layer 131 is shorter, 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 .

[0052] For example, in some examples, such 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 shortest distance between the two second protrusions 114 of the two second color light-emitting layers 121 is in the range of 14-20 microns, 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 microns. At this time, relative to the usual 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, thereby further increasing the utilization rate of the gap on the one hand, and further increasing the distance (Margin) between the rounded edge of the second color light-emitting layer and the rounded edge of the corresponding anode on the other hand, thereby further reducing or even avoiding the risk of color mixing, color deviation and other defects, and improving the yield. It should be noted that, unlike the first protrusion, the second protrusion does not protrude from the extension line of the straight side of the second rounded rectangle.

[0053] For example, considering the current manufacturing process level of FMM, the distance D between two adjacent second protrusions 114 of two second color light emitting layers 121 is in the range of 13-17 micrometers.

[0054] For example, the distance D between two adjacent second protrusions 114 of two second color light emitting layers 121 is 15 micrometers.

[0055] For example, in some examples, such 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 protruding portion 134 located at the rounded corner of the third rounded rectangle 132 and protruding toward the gap 140. The third protruding portion 134 at least partially protrudes from the extension line of the straight side 133 of the third rounded rectangle 132 close to the second color light emitting layer 121. Similar to the first protruding portion, the third protruding portion at least partially protrudes from the extension line of the straight side of the third rounded rectangle close to the second color light emitting layer. Compared with the usual pixel structure, the third protruding portion of the third color light emitting layer occupies a part of the area of ​​the gap, or reduces the area of ​​the gap, thereby further increasing the utilization rate of the gap on the one hand, and further increasing the distance (Margin) between the rounded edge of the third color light emitting layer and the rounded edge of the corresponding anode on the other hand, thereby reducing or even avoiding the risk of color mixing, color deviation and other defects, and improving the yield.

[0056] For example, in some examples, such 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. That is, although the above description only focuses on the shapes of the corner of the first color light-emitting layer 111 close to the gap 140, the corner of the second color light-emitting layer 121 close to the gap 140, and the corner 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 corner 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 corner 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 corner of the third color light-emitting layer 131 close to the gap 140.

[0057] 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 emit light from the above-mentioned first color light-emitting layer 111, two second color light-emitting layers 121 and one third color light-emitting layer 131. For example, the first color anode 118, two second color anodes 128 and one third color anode 138 are respectively arranged on a first color light-emitting layer 111, two second color light-emitting layers 121 and one third color light-emitting layer 131. In other words, an anode is correspondingly arranged on each light-emitting layer; the first color light-emitting layer 111 and the first color anode 118 and other necessary layer structures (for example, a cathode, a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer) can constitute a first color sub-pixel 111. For example, the first color anode 118 and the cathode arranged on both sides of the first color light-emitting layer 111 can drive the first color light-emitting layer 111 to emit light through current. The second color light-emitting layer 121 and the second color anode 128 and other necessary layer structures (e.g., cathode, hole transport layer, hole injection layer, electron transport layer, electron injection layer) may constitute the second color sub-pixel 120. For example, the second color anode 128 and cathode disposed on both sides of the second color light-emitting layer 121 may drive the second color light-emitting layer 121 to emit light by current. The third color light-emitting layer 131 and the first color anode 138 and other necessary layer structures (e.g., cathode, hole transport layer, hole injection layer, electron transport layer, electron injection layer) may constitute the third color sub-pixel 130. For example, the third color anode 138 and cathode disposed on both sides of the third color light-emitting layer 131 may drive the third color light-emitting layer 131 to emit light by current. The shape of the first color anode 118 may be a fourth rounded rectangle 119, the shape of the second color anode 128 may be a fifth rounded rectangle 129, and the shape of the sixth color anode 138 may be a sixth rounded rectangle 139. The shortest distance between the straight side of the fourth rounded rectangle 119 and the straight side of the fifth rounded rectangle 129 is P, and the shortest distance between the straight side of the fifth rounded rectangle 129 and the straight side of the sixth rounded rectangle 139 is P, that is, the distance between the anodes of adjacent different sub-pixels in the straight side direction (PDL gap) 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, located in the central area of ​​the first rounded rectangle 112, and the shortest distance between the straight side of the fourth rounded rectangle 119 and the straight side of the first rounded rectangle 112 is 1 / 2*P. In other words, 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 position and size relationship between the light-emitting layer and the anode, Figure 5 The anode is arranged on the light-emitting layer. However, the up-down position relationship between the light-emitting layer and the anode can be reversed, and the embodiment of the present disclosure does not limit this; that is, the up-down position relationship between the light-emitting layer and the anode can be arranged according to actual conditions.

[0058] 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, located at the center area of ​​the second rounded rectangle 112, and the shortest distance between the straight side of the fifth rounded rectangle 129 and the straight side of the second rounded rectangle 122 is 1 / 2*P. In other words, the second rounded rectangle 122 is a rounded rectangle formed by expanding the fifth rounded rectangle 129 by 1 / 2*P.

[0059] 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, located at the central area of ​​the third rounded rectangle 112, and the shortest distance between the straight side of the sixth rounded rectangle 139 and the straight side of the third rounded rectangle 132 is 1 / 2*P. In other words, the third rounded rectangle 132 is a rounded rectangle formed by expanding the sixth rounded rectangle 139 by 1 / 2*P.

[0060] Figure 6 FIG. 1 is a schematic diagram of an arrangement of a pixel structure provided according to an embodiment of the present disclosure. Figure 6 As shown, each pixel group 100 is a repeating unit, and the pixel structure may include a plurality of pixel groups 100 arranged along two directions with an angle of 45 degrees with the first direction. The four sub-pixels in each pixel group 100 form two pixels, one of the two second color sub-pixels 120 (e.g., green sub-pixels) and one first color sub-pixel 110 (e.g., red sub-pixel) form one pixel, and the other of the two second color sub-pixels 120 and one third color sub-pixel 130 (e.g., blue sub-pixel) form one pixel, and the first color sub-pixel 110 and the third sub-pixel 130 are shared by the two pixels respectively.

[0061] For example, in some examples, such as Figure 6As shown, a plurality of first color sub-pixels 110, a plurality of second color sub-pixels 120, and a plurality of third color sub-pixels 130 may also be arranged as a plurality of first repeating units 101 and a plurality of second repeating units 102, each first repeating unit 101 includes a first color sub-pixel 110 (e.g., a red sub-pixel) and a second color sub-pixel 120 (e.g., a green sub-pixel), and each second repeating unit 102 includes a third color sub-pixel 130 (e.g., a blue sub-pixel) and a second color sub-pixel 120 (a green sub-pixel). The plurality of first repeating units 101 and the plurality of second repeating units 102 are arranged alternately along the first direction and the second direction. The plurality of first color sub-pixels 110 and the plurality of third color sub-pixels 130 are arranged alternately along the first direction and the second direction, and the plurality of 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 a first color sub-pixel 110 or a third color sub-pixel 130.

[0062] Figure 7 FIG. 1 is a partial schematic diagram of another pixel structure provided according to an embodiment of the present disclosure. Figure 7 As shown, the first protrusion 114 is located in the first triangular region 151, one end of the first short side 1511 of the first triangular region 151 is the midpoint of the line connecting the centers of the adjacent second color light-emitting layers 121, and extends toward the gap 140 along the second direction with a length of 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 with the straight side 113 of the first rounded rectangle 112 close to the second color light-emitting layer 121, and the length is R1. In other words, 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 of a 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-mentioned L1 is greater than 4 microns, and R1 is in the range of 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 can also take into account the existing FMM manufacturing process.

[0063] For example, R1 may be in the range of 8-12 micrometers, for example, R1 may be 10 micrometers, thereby having a better compensation effect.

[0064] For example, in some examples, the distance between the endpoint 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.

[0065] For example, in some examples, such as Figure 7As shown, the third protrusion 134 is located in the second triangular region 152, one end of the third short side 1523 of the second triangular region 152 is the midpoint of the line connecting the centers of the adjacent second color light-emitting layers 121, and extends toward the gap 140 along the second direction with a length of 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 light-emitting layer 121, and the length is R2. In other words, 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 of a 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 light-emitting layer 121. The above L2 is greater than 4 microns, and R2 is in the range of 5-15 microns. At this time, the third protrusion has a good compensation effect on the rounded corners of the third color light-emitting layer close to the gap, and can also take into account the existing FMM manufacturing process. For example, when manufacturing an FMM for evaporating the third color light-emitting layer, the combination of the second triangular area and the third rounded rectangle can be used as an FMM opening design scheme. Figure 7 As shown, L1 may be equal to L2, and R1 may be equal to R2.

[0066] For example, R2 may be in the range of 8-12 microns, for example, R2 may be 10 microns, thereby having a better compensation effect. Figure 7 As shown, the distance between the endpoint of the third short side 1523 on the straight side 133 of the third rounded rectangle 132 close to the second color light-emitting layer 121 and the midpoint of the straight side 133 of the third rounded rectangle 132 close to the second color light-emitting layer 121 is greater than 5 microns.

[0067] It is worth noting that the above embodiments respectively propose improvements to the first color light-emitting layer, the second color light-emitting layer and the third color light-emitting layer. When the improvements to the first color light-emitting layer, the second color light-emitting layer and the third color light-emitting layer exist at the same time, the pixel structure provided by the embodiment of the present disclosure has a high utilization rate of the gap, and can greatly reduce the probability of the risk of adverse effects such as color mixing and color deviation, and improve the yield. Of course, the embodiment of the present disclosure includes but is not limited to this, and can also only improve one or two of the first color light-emitting layer, the second color light-emitting layer and the third color light-emitting layer.

[0068] Figure 8 A comparison diagram of a pixel structure provided according to an embodiment of the present disclosure and a common pixel structure. Figure 8 The solid line in the middle is the rounded edge of each light-emitting layer in the pixel structure provided by the embodiment of the present disclosure. Figure 8The middle dotted line is the rounded edge of each light-emitting layer in a common pixel structure. When the anode size and the distance between the anodes of adjacent different sub-pixels in the straight edge direction (PDL gap) are ensured to be the same, Figure 8 As shown, the pixel structure provided by the embodiment 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 distance (Margin) is 1-2μm, which is significantly increased compared to the usual manufacturing process, thereby greatly reducing the probability of the risk of color mixing, color deviation and other defects, and improving the yield. Of course, the increment of the above distance (Margin) is closely related to the relevant parameters of the sub-pixel, such as the pixel size, PDL gap, and the ratio of the opening area 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 will 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 value of the above parameters such as D, R1, L1, R2, and L2 can be in the value range, and the more obvious the compensation effect. Of course, when the pixel size reaches a certain value, the compensation effect will not increase with the increase of the pixel size.

[0069] It is worth noting 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 may increase the size of the rounded corner of the first color anode corresponding to the first color light-emitting layer corresponding to the first protrusion, thereby increasing the aperture ratio of the first color anode corresponding to the first color light-emitting layer, thereby improving the life of the product. 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 the third color anode, but may increase the size of the rounded corner of the second color anode or the third color anode corresponding to the second protrusion or the third protrusion, thereby increasing the aperture ratio of the second color anode or the third color anode, thereby improving the life of the product. For example, Fig. 9 FIG. 1 is a plan view of another pixel structure provided according to an embodiment of the present disclosure. Fig. 9 As shown, the size of the rounded corners of the first color anode 118 is increased accordingly with respect to the first protrusion 114, for example, extended toward the first protrusion 114, thereby increasing the opening ratio of the first color anode 118, thereby improving the product life. Fig. 9As shown, the size of the rounded corners of the second color anode 128 or the third color anode 138 may be increased accordingly with respect to the second protrusion 124 or the third protrusion 134, thereby increasing the opening ratio of the second color anode 128 or the third color anode 138, thereby improving the product life.

[0070] For example, in some examples, such as Fig. 9 As shown, the shape of the first color anode 118 also includes a fourth protrusion 1185 located at the rounded corner of the fourth rounded rectangle 119 and protruding toward the gap 140. The fourth protrusion 1185 at least partially protrudes from the extension line of the straight side of the fourth rounded rectangle 119 close to the second color light-emitting layer 121, thereby increasing the opening ratio of the first color anode 118 and improving the product life.

[0071] For example, in some examples, such as Fig. 9 As shown, the shape of the third color anode 138 also includes a fifth protrusion 1385 located at the rounded corner of the sixth rounded rectangle 139 and protruding toward the gap 140. The fifth protrusion 1385 at least partially protrudes from the extension line of the straight side of the sixth rounded rectangle 139 close to the second color light-emitting layer 121, thereby increasing the aperture ratio of the first color anode 118 and improving the product life. The embodiment of the present disclosure also provides a fine metal mask set for evaporating the pixel structure provided by the above embodiment. The fine metal mask set includes a first mask 310, Fig.10 A partial schematic diagram of a first mask provided according to an embodiment of the present disclosure is shown in FIG. Fig.10 As shown, the first mask 310 includes a plurality of first openings 312, each of which 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 at least partially protrudes from the extension line of the straight side of the first rounded rectangle.

[0072] For example, in some examples, the fine metal mask set includes a second mask 320, Fig.11 A partial schematic diagram of a second mask provided according to an embodiment of the present disclosure is shown in FIG. Fig.11 As shown, the second mask 320 includes a plurality of second openings 322, each of which 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.

[0073] For example, in some examples, the fine metal mask set includes a third mask 330, Fig.12 FIG. 1 is a partial schematic diagram of a third mask provided according to an embodiment of the present disclosure, such as Fig.12 As shown, the third mask 330 includes a plurality of third openings 332, each of which 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 the third protrusion at least partially protrudes from the extension line of the straight side of the third rounded rectangle.

[0074] For example, in some examples, the fine metal mask template group includes a first mask template 310, a second mask template 320 and a third mask template 330 that are used in combination so that the first color light-emitting layer formed by vapor deposition using the first mask template and the third color light-emitting layer formed by vapor deposition using the third mask template are arranged along a first direction, and the two second color light-emitting layers formed by vapor deposition using the second mask template are arranged along a second direction, and the line connecting the two second color light-emitting layers intersects with the line connecting the first color light-emitting layer and the third color light-emitting layer, thereby forming a pixel group.

[0075] Fig.13 A comparison diagram of a first opening on a first mask provided according to an embodiment of the present disclosure and an opening on a common mask. Fig.13 The solid line in the middle is the rounded edge of the first opening on the first mask provided in the embodiment of the present disclosure. Fig.13 The dashed line in the middle is the rounded edge of the opening on the usual mask. Fig.13 As shown, the distance (Margin) between the vertex of the rounded edge of the first opening 312 and the corresponding anode is 10.34 microns, while the distance between the rounded edge of the conventional opening and the corresponding anode is 9.33 microns. Fig.13 As shown, the maximum distance between the rounded edge of the first opening 312 and the rounded edge of the normal opening is 1.51 microns.

[0076] Fig.14 The figure is a comparison diagram between a second opening on a second mask provided according to an embodiment of the present disclosure and an opening on a common mask. Fig.14 The solid line in the middle is the rounded edge of the second opening on the second mask provided in the embodiment of the present disclosure. Fig.14 The dashed line in the middle is the rounded edge of the opening on the usual mask. Fig.14 As shown, the distance between the vertex of the rounded edge of the second opening 322 and the corresponding anode is 9.82 microns, while the distance between the rounded edge of a conventional opening and the corresponding anode is 8.5 microns.

[0077] Fig.15 The figure is a comparison diagram between a third opening on a first mask plate and an opening on a common mask plate provided according to an embodiment of the present disclosure. Fig.15The solid line in the middle is the rounded edge of the third opening on the third mask provided in the embodiment of the present disclosure. Fig.15 The dashed line in the middle is the rounded edge of the opening on the usual mask. Fig.15 As shown, the distance between the vertex of the rounded edge of the third opening 332 and the corresponding anode is 10.34 microns, while the distance between the rounded edge of the common opening and the corresponding anode is 9.33 microns. In addition, the maximum distance between the rounded edge of the third opening 332 and the rounded edge of the common opening is 1.50 microns.

[0078] An embodiment of the present disclosure also provides a display device including the above-mentioned pixel structure, which is an organic light-emitting diode (OLED) display device. 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., but the present embodiment is not limited thereto.

[0079] There are a few points to note:

[0080] (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 general design.

[0081] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present disclosure may be combined with each other.

[0082] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pixel structure, comprising: at least one pixel group, each of the pixel groups comprising: 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 a line connecting the centers of the two second color light-emitting layers intersects a line connecting the centers of the first color light-emitting layer and the third color light-emitting layer, Wherein, in each of the pixel groups, a gap is included between adjacent first color light-emitting layers, second color light-emitting layers, and third color light-emitting layers; the shape of the first color light-emitting layer includes a first rounded rectangle, and a first convex portion located at a rounded corner of the first rounded rectangle and protruding toward the gap; the first convex portion at least partially protrudes from an extension line of a straight side of the first rounded rectangle close to the second color light-emitting layer; In each of the pixel groups, the shape of the second color light-emitting layer includes a second rounded rectangle, the rounded corners of the second rounded rectangle close to the gap are second protrusions, the distance D between two adjacent second protrusions of two second color light-emitting layers is in the range of 14-20 microns, the first color light-emitting layer is a red light-emitting layer, the second color light-emitting layer is a green light-emitting layer, and the third color light-emitting layer is a blue light-emitting layer.

2. The pixel structure according to claim 1, 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 corners of the third rounded rectangle and protruding toward the gap, and the third protrusion at least partially protrudes from the extension line of the straight side of the third rounded rectangle close to the second color light-emitting layer.

3. The pixel structure according to claim 1 or 2, wherein: The first raised portion is located in the first triangular area, one end of the first short side of the first triangular area is the midpoint of the line connecting the centers of adjacent second color light-emitting layers, and extends toward the gap along the second direction with a length of L1, one end of the second short side of the first triangular area is the end point of the first short side located in 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, wherein L1 is greater than 4 microns and R1 is in the range of 5-15 microns.

4. The pixel structure according to claim 3, wherein: The distance between an endpoint of the second short side on the straight side of the first rounded rectangle close to the second color light-emitting layer and a midpoint of the straight side of the first rounded rectangle close to the second color light-emitting layer is greater than 5 micrometers.

5. The pixel structure according to claim 2, wherein: The third protrusion is located in the second triangular area, one end of the third short side of the second triangular area is the midpoint of the line connecting the centers of adjacent second color light-emitting layers, and extends toward the gap along the second direction with a length of L2, one end of the fourth short side of the second triangular area is the endpoint of the third short side located in 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, wherein L2 is greater than 4 microns and R2 is in the range of 5-15 microns.

6. The pixel structure according to claim 5, wherein: 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 micrometers.

7. The pixel structure according to claim 1 or 2, wherein: Each of the pixel groups further includes: a first color anode, two second color anodes and one 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, 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side of 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 side of the fourth rounded rectangle and the straight side of the first rounded rectangle is 1 / 2*P.

8. The pixel structure according to claim 7, wherein: The shape of the first color anode further includes a fourth protrusion located at the rounded corner of the fourth rounded rectangle and protruding toward the gap, and the fourth protrusion at least partially protrudes from the extension line of the straight side of the fourth rounded rectangle close to the second color light-emitting layer.

9. The pixel structure according to claim 1, wherein: Each pixel group further includes: a first color anode, two second color anodes and one 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, 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side of 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 side of the fifth rounded rectangle and the straight side of the second rounded rectangle is 1 / 2*P.

10. The pixel structure according to claim 2, wherein: Each pixel group further includes: a first color anode, two second color anodes and one 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, 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 side of the fourth rounded rectangle and the straight side of the fifth rounded rectangle is P, the shortest distance between the straight side of the fifth rounded rectangle and the straight side 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 side of the sixth rounded rectangle and the straight side of the third rounded rectangle is 1 / 2*P.

11. The pixel structure according to claim 10, 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 toward the gap, and the fifth protrusion at least partially protrudes from the extension line of the straight side of the sixth rounded rectangle close to the second color light-emitting layer.

12. The pixel structure according to claim 1 or 2, wherein: The first direction and the second direction are perpendicular.

13. The pixel structure according to claim 1 or 2, wherein: 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.

14. A fine metal mask set for evaporating the pixel structure according to claim 1, comprising: A first mask plate includes a plurality of first openings, each of which is used to form the first color light-emitting layer. In each of the pixel groups, 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 is a second convex portion, and the distance D between two adjacent second convex portions of two second color light-emitting layers is in the range of 14-20 microns. The fine metal mask set also includes: The second mask includes a plurality of second openings, each of which is used to form the second color light-emitting layer. Wherein, the first color light-emitting layer is a red light-emitting layer, and the second color light-emitting layer is a green light-emitting layer.

15. The fine metal mask set according to claim 14, wherein: The shape of the first opening is substantially the same as that of the first color light emitting layer.

16. The fine metal mask set according to claim 14, wherein: The shape of the second opening is substantially the same as that of the second color light emitting layer.

17. The fine metal mask set according to any one of claims 14 to 16, wherein: 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, and the third protruding portion at least partially protrudes from an extension line of a straight side of the third rounded rectangle close to the second color light-emitting layer, and the fine metal mask set further includes: The third mask includes a plurality of third openings, each of which is used to form the third color light-emitting layer.

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

Images