Display panel, preparation method of display panel and display device

Abstract

The invention provides a display panel, a preparation method of the display panel and a display device.The display panel comprises a first substrate, a first pixel definition layer and a first light-emitting unit layer which are sequentially arranged; a first light-emitting area of the first light-emitting unit layer covers a first pixel definition opening of the first pixel definition layer in a planar graph, and a first non-light-emitting area of the first light-emitting material surrounds the first light-emitting area; wherein four adjacent first light-emitting materials with the same color serve as a first repeating unit, and the first repeating unit comprises two adjacent first light-emitting materials with the same color in the first direction and two adjacent first light-emitting materials with the same color in the second direction; in the first repeating unit, the four first light-emitting materials have a first center, and the width of a first non-light-emitting region of the first light-emitting material close to the first center is smaller than the width of the first non-light-emitting region away from the first center. The color mixing risk of light-emitting materials of different colors of the display panel can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of display panels, and in particular to a display panel, a method for preparing a display panel, and a display device. Background Art

[0002] In an OLED (Organic Light-Emitting Diode) display panel, the RGB (red, green, and blue) light-emitting layer is prepared by a vacuum thermal evaporation process. During the evaporation process, the organic light-emitting material is heated to a sublimation or vaporization state, so that it is deposited on a specified area on the substrate in a vacuum environment. This process requires the use of a metal mask to achieve spatially selective deposition of the RGB light-emitting material.

[0003] However, during the evaporation process of the RGB light-emitting layer, the RGB light-emitting material cannot be accurately deposited at the target position due to the possible misalignment between the metal mask and the substrate. The misalignment will cause color mixing in the intersection area between the RGB sub-pixels, thus affecting the display quality. Summary of the invention

[0004] In view of this, the present invention provides a display panel, a method for preparing a display panel and a display device, so as to at least solve the problem that when the luminescent material of the display panel is evaporated, the mask plate has an alignment deviation, resulting in a high risk of mixing of luminescent materials of different colors.

[0005] In one aspect, an embodiment of the present invention provides a display panel, comprising: a first substrate; a first pixel definition layer, located on one side of the first substrate, the first pixel definition layer comprising a plurality of first pixel definition openings; a first light-emitting unit layer, located on a side of the first pixel definition layer away from the first substrate, the first light-emitting unit layer comprising a plurality of first light-emitting materials, the first light-emitting material comprising a first light-emitting area and a first non-light-emitting area, the first non-light-emitting area surrounding the first light-emitting area, and each first light-emitting area covering a first pixel definition opening in a plan view; wherein four adjacent first light-emitting materials of the same color are used as a first repeating unit, the first repeating unit comprising two first light-emitting materials of the same color adjacent to each other along a first direction and two first light-emitting materials of the same color adjacent to each other along a second direction, and the first direction intersects with the second direction; in the first repeating unit, the four first light-emitting materials have a first center, and the width of the first non-light-emitting area of ​​the first light-emitting material close to the first center is smaller than the width of the first non-light-emitting area away from the first center.

[0006] On the other hand, an embodiment of the present invention also provides a method for preparing a display panel, comprising: providing a first substrate; preparing a first pixel definition layer on one side of the first substrate; wherein the first pixel definition layer includes a plurality of first pixel definition openings; providing a mask plate, and vapor-depositing a first light-emitting unit layer on the side of the first pixel definition layer away from the first substrate through the mask plate; wherein the first light-emitting unit layer includes a plurality of first light-emitting materials, the first light-emitting material includes a first light-emitting area and a first non-light-emitting area, the first non-light-emitting area surrounds the first light-emitting area, and each first light-emitting area covers a first pixel definition opening in a plan view; four adjacent first light-emitting materials of the same color are used as a first repeating unit, the first repeating unit includes two first light-emitting materials of the same color adjacent to each other along a first direction and two first light-emitting materials of the same color adjacent to each other along a second direction, and the first direction intersects with the second direction; in the first repeating unit, the four first light-emitting materials have a first center, and the width of the first non-light-emitting area of ​​the first light-emitting material close to the first center is smaller than the width away from the first center.

[0007] In yet another aspect, an embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0008] The display panel, the method for preparing the display panel and the display device of the present invention use four first light-emitting materials of the same color, two in each of the first direction and the second direction, as a first repeating unit, and make the positions of the four first light-emitting materials close to the center of the first repeating unit. In this way, during the evaporation process of the first light-emitting material, when the mask plate is offset in any direction, the positions of at least two first light-emitting materials in the first repeating unit are close to the center of the first pixel definition opening corresponding to the first light-emitting material, thereby reducing the risk of color mixing of adjacent first light-emitting materials of different colors.

[0009] On the other hand, an embodiment of the present invention further provides a display panel, characterized in that it includes: a second substrate; a second pixel definition layer, located on one side of the second substrate, the second pixel definition layer including a plurality of second pixel definition openings; a third light-emitting unit layer, located on the side of the second pixel definition layer away from the second substrate, the third light-emitting unit layer including a plurality of third light-emitting materials, the third light-emitting material including a second light-emitting area and a first compensation area, the first compensation area surrounds the second light-emitting area, and each third light-emitting material covers a second pixel definition opening in a plan view; wherein four adjacent third light-emitting materials of the same color are used as a second repeating unit, the second repeating unit includes two third light-emitting materials of the same color adjacent to each other along a third direction and two third light-emitting materials of the same color adjacent to each other along a fourth direction, and the third direction intersects with the fourth direction; in the second repeating unit, the four third light-emitting materials have a second center, and the first compensation areas of the four third light-emitting materials are centrally symmetric based on the second center.

[0010] On the other hand, an embodiment of the present invention further provides a method for preparing a display panel, comprising: providing a second substrate; preparing a second pixel definition layer on one side of the second substrate; wherein the second pixel definition layer includes a plurality of second pixel definition openings; providing a mask plate, and vapor-depositing a third light-emitting unit layer on the side of the second pixel definition layer away from the second substrate through the mask plate; wherein the third light-emitting unit layer includes a plurality of third light-emitting materials, the third light-emitting material includes a second light-emitting area and a first compensation area, the first compensation area surrounds the second light-emitting area, and each third light-emitting material covers a second pixel definition opening in a plan view; four adjacent third light-emitting materials of the same color are used as a second repeating unit, the second repeating unit includes two third light-emitting materials of the same color adjacent to each other along a third direction and two third light-emitting materials of the same color adjacent to each other along a fourth direction, and the third direction intersects with the fourth direction; in the second repeating unit, the four third light-emitting materials have a second center, and the first compensation areas of the four third light-emitting materials are centrally symmetrical based on the second center.

[0011] In yet another aspect, an embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0012] The display panel, the method for preparing the display panel and the display device of the present invention set a first compensation area for the third light-emitting material, and use two third light-emitting materials of the same color in the third direction and the fourth direction, for a total of four, as a second repeating unit, and make the first compensation areas of the four third light-emitting materials centrally symmetrical. Therefore, during the vapor deposition process of the third light-emitting material, when the mask plate is displaced in any direction, at least two first compensation areas of the third light-emitting material in the second repeating unit can be used to compensate for the displacement of the mask plate, thereby reducing the risk of color mixing when adjacent first light-emitting materials of different colors are evaporated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0014] Figure 1 is a schematic diagram of a cross-sectional structure in the thickness direction of a display panel provided by an embodiment of the present invention;

[0015] Figure 2 yes Figure 1 A top view of the first luminescent material;

[0016] Figure 3 is a schematic diagram of a first repeating unit provided in an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of another first repeating unit provided in an embodiment of the present invention;

[0018] Figure 5 is a schematic diagram of a first light-emitting material provided by an embodiment of the present invention;

[0019] Figure 6 is a schematic diagram of a cross-sectional structure in the thickness direction of another display panel provided by an embodiment of the present invention;

[0020] Figure 7 is a flowchart of a method for manufacturing a display panel provided by an embodiment of the present invention;

[0021] Figure 8 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

[0022] Fig. 9 is a schematic diagram of a cross-sectional structure in the thickness direction of another display panel provided by an embodiment of the present invention;

[0023] Fig.10 yes Fig. 9 A top view of a second luminescent material;

[0024] Fig.11 yes Fig.10 A schematic diagram of a second luminescent material;

[0025] Fig.12 yes Fig.11 A schematic diagram of a second repeating unit corresponding to the second luminescent material;

[0026] Fig.13 yes Fig.10 A schematic diagram of another second luminescent material;

[0027] Fig.14 yes Fig.13 A schematic diagram of a second repeating unit corresponding to the second luminescent material;

[0028] Fig.15 is a schematic diagram of a cross-sectional structure in the thickness direction of another display panel provided by an embodiment of the present invention;

[0029] Fig.16 is a flowchart of another method for preparing a display panel provided by an embodiment of the present invention;

[0030] Fig.17 It is a schematic diagram of the structure of another display device provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 11. a first substrate;

[0033] 12. First pixel definition layer;

[0034] 13. A first light-emitting unit layer;

[0035] 131. a first luminescent material;

[0036] 1311, first light emitting area;

[0037] 1312, first non-luminous area;

[0038] 1313, first anode via;

[0039] 14. The first repeating unit;

[0040] 141. First Center;

[0041] 15. a first electrode layer;

[0042] 16. A second electrode layer;

[0043] 17. A second light-emitting unit layer;

[0044] 171. A second luminescent material;

[0045] 1X, first direction;

[0046] 1Y, second direction;

[0047] 21. a second substrate;

[0048] 22. A second pixel definition layer;

[0049] 221, second pixel definition opening;

[0050] 23. The third light-emitting unit layer;

[0051] 231. a third luminescent material;

[0052] 2311, second luminous area;

[0053] 2312, first compensation area;

[0054] 2313, Redundancy Area;

[0055] 2314, second anode via;

[0056] 24. The second repeating unit;

[0057] 241, Second Center;

[0058] 25. a third electrode layer;

[0059] 26. fourth electrode layer;

[0060] 27. Fourth light-emitting unit layer;

[0061] 271, fourth luminescent material;

[0062] 2X, third direction;

[0063] 2Y, fourth direction. DETAILED DESCRIPTION

[0064] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0065] The words "first", "second" and the like used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" are based on the orientation or position relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0066] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0067] On one hand, Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a display panel, which includes a first substrate 11 , a first pixel definition layer 12 and a first light emitting unit layer 13 .

[0068] The first pixel definition layer 12 is located on one side of the first substrate 11 . The first pixel definition layer 12 includes a plurality of first pixel definition openings for partially accommodating the first light emitting unit layer 13 .

[0069] The first light-emitting unit layer 13 is located on the side of the first pixel definition layer 12 away from the first substrate 11. The first light-emitting unit layer 13 includes a plurality of first light-emitting materials 131, and each first light-emitting material 131 is partially located in a first pixel definition opening. The first light-emitting material 131 includes a first light-emitting area 1311 and a first non-light-emitting area 1312, the first non-light-emitting area 1312 surrounds the first light-emitting area 1311, and each first light-emitting area 1311 covers a first pixel definition opening in a plan view. That is, not all parts of each first light-emitting material 131 emit light, wherein the first non-light-emitting area 1312 is a redundant part when the first light-emitting material 131 is prepared by evaporation, and is used to ensure that the first light-emitting material 131 covers the first pixel definition opening. Specifically, the size of the first light-emitting area 1311 can also be the area size of the effective electrode, and the area of ​​the effective electrode is equal to the area of ​​the first pixel definition opening. In addition, the first light-emitting material 131 includes light-emitting materials of three colors, specifically red, green and blue.

[0070] Specifically, four adjacent first light-emitting materials 131 of the same color are used as the first repeating unit 14, and the first repeating unit 14 includes two adjacent first light-emitting materials 131 of the same color along the first direction 1X and two adjacent first light-emitting materials 131 of the same color along the second direction 1Y. The first direction 1X intersects the second direction 1Y. According to different pixel arrangement modes and the shapes of the first light-emitting materials 131, the first repeating unit 14 may include various forms, Figure 3 In the example, only one first repeating unit 14 of the first luminescent material 131 of one color is used as an example for illustration, which is not limiting. Figure 3 Take the Delta pixel arrangement adopted in the display panel as an example, but as long as the number of the first light-emitting materials 131 of the three colors is equal, the above-mentioned setting of the present application can be adopted. When the number of the first light-emitting materials 131 of the three colors is not equal, for example, the display panel adopts the "2in 1" pixel arrangement, the two green first light-emitting materials 131 in one pixel can be defined as a whole as the first repeating unit 14. That is, in this case, the first repeating unit 14 corresponding to the green first light-emitting material 131 has eight green first light-emitting materials 131. In other embodiments, the number of the first light-emitting materials 131 included in the first repeating unit 14 can be determined according to the specific pixel arrangement method, and the present application does not limit it. In addition, the first direction 1X and the second direction 1Y can be perpendicular or non-perpendicular, and the present application does not limit it.

[0071] Further, in the first repeating unit 14, the four first light-emitting materials 131 have a first center 141. The width of the first non-light-emitting region 1312 of the first light-emitting material 131 near the first center 141 is smaller than the width of the first non-light-emitting region 1312 away from the first center 141. That is, in each first repeating unit 14, each first light-emitting region 1311 is not located at the center of the first light-emitting material 131, but is located at the edge of one side of the first light-emitting material 131 near the first center 141, thereby forming a state in which the four first light-emitting regions 1311 are close to each other, so that the width of the first non-light-emitting region 1312 near the first center 141 is smaller than the width of the first non-light-emitting region 1312 away from the first center 141. The above-mentioned arrangement, by using two first light-emitting materials 131 of the same color along the first direction 1X and the second direction 1Y, a total of four, as a first repeating unit 14, and making the positions of the four first light-emitting materials 131 close to the center of the first repeating unit 14, so that during the evaporation process of the first light-emitting material 131, when the mask plate is offset in any direction (for example, the first direction 1X or the second direction 1Y), the positions of at least two first light-emitting materials 131 in the first repeating unit 14 are close to the center of the first pixel definition opening corresponding to the first light-emitting material 131, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors.

[0072] In addition, in the arrangement of the first light-emitting material 131 of the entire display panel, according to different definitions of the first repeating unit 14, in other first repeating units 14, the width of the first non-luminous area 1312 of the first light-emitting material 131 near the first center 141 may be greater than the width of the first non-luminous area 1312 away from the first center 141. However, the arrangement of the first light-emitting material 131 of the display panel formed by the different definitions of the first repeating unit 14 is actually the same. Therefore, this application only takes the above-mentioned embodiment as an example, and the embodiments of other definitions of the first repeating unit 14 are not repeated because the principles are the same.

[0073] Continue to refer Figure 2 and Figure 3 Since the position of the first light-emitting area 1311 is the position of the first pixel definition opening, and the first light-emitting material 131 is prepared by vapor deposition at the first pixel definition opening, in order to realize that the first light-emitting area 1311 is located at the edge of the first light-emitting material 131 close to the first center 141, it can be realized by changing the vapor deposition position of the first light-emitting material 131 or changing the opening position of the first pixel definition opening. The following describes the two implementation methods respectively:

[0074] In some alternative embodiments, along the first direction 1X and the second direction 1Y, the distances between the first pixel definition openings corresponding to two adjacent first light-emitting materials 131 of the same color are equal, and the distances between the two adjacent first light-emitting materials 131 of the same color are arranged alternately in a large and a small manner. Specifically, in this embodiment, the evaporation position of the first light-emitting material 131 is changed to achieve that the first light-emitting area 1311 is located at the edge of the first light-emitting material 131 on the side close to the first center 141. Since the first light-emitting material 131 needs to be prepared at the first pixel definition opening by evaporation through the openings of the mask plate, the position and size of the openings of the mask plate correspond to the evaporation position and size of the first light-emitting material 131, and the position of the first light-emitting area 1311 is the position of the first pixel definition opening. Therefore, in the first repeating unit 14, the positions of the openings of the four mask plates corresponding to the four first light-emitting materials 131 can be designed to be away from the centers of the openings of the four mask plates, so that the first light-emitting areas 1311 of the four first light-emitting materials 131 obtained by evaporation are located at the edge of the first light-emitting material 131 on the side close to the first center 141. In this case, since the position of the pixel definition opening is not changed but the position of the first light emitting material 131 is changed, in the arrangement of the first light emitting material 131 of the entire display panel, along the first direction 1X and the second direction 1Y, the distance between the first pixel definition openings corresponding to two adjacent first light emitting materials 131 of the same color is equal, and the distance between two adjacent first light emitting materials 131 of the same color is arranged alternately in a large and a small manner. In addition, Figure 3 Taking the display panel adopting the Delta pixel arrangement as an example, the above arrangement can be adopted as long as the number of first light-emitting materials 131 of three colors is equal.

[0075] Furthermore, in other embodiments where the number of first light-emitting materials 131 of three different colors is different, for example, the display panel adopts a "2 in 1" pixel arrangement, in this case, two green first light-emitting materials 131 in one pixel can be taken as a group, and the distance between two adjacent groups of green first light-emitting materials 131 along the first direction 1X and the second direction 1Y can be arranged alternately as one large and one small. In other embodiments, a similar method can also be used for adaptive adjustment, and this application does not limit this.

[0076] In some other alternative embodiments, along the first direction 1X and the second direction 1Y, the distances between two adjacent first light-emitting materials 131 of the same color are equal, and the distances between the first pixel definition openings corresponding to the two adjacent first light-emitting materials 131 of the same color are arranged alternately in a large and a small manner. Specifically, in this embodiment, the opening position of the first pixel definition opening is changed to achieve that the first light-emitting area 1311 is located at the edge of the first light-emitting material 131 on the side close to the first center 141. Since the first light-emitting material 131 covers the first pixel definition opening, the position of the first light-emitting area 1311 is the position of the first pixel definition opening, and the first non-light-emitting area 1312 surrounds the first light-emitting area 1311. Therefore, in the first repeating unit 14, the positions of the four first pixel definition openings corresponding to the four first light-emitting materials 131 can be designed to be close to the centers of the four first pixel definition openings, so that the first light-emitting areas 1311 of the four first light-emitting materials 131 obtained by evaporation are located at the edge of the first light-emitting material 131 on the side close to the first center 141. In this case, since the position of the pixel definition opening is changed but the position of the first light emitting material 131 is not changed, in the arrangement of the first light emitting material 131 of the entire display panel, the distances between two adjacent first light emitting materials 131 of the same color along the first direction 1X and the second direction 1Y are equal, and the distances between the first pixel definition openings corresponding to two adjacent first light emitting materials 131 of the same color are arranged alternately in a large and a small pattern. In addition, Figure 3 Taking the display panel adopting the Delta pixel arrangement as an example, the above arrangement can be adopted as long as the number of first light-emitting materials 131 of three colors is equal.

[0077] Furthermore, in other embodiments where the number of first light-emitting materials 131 of three different colors is different, for example, the display panel adopts a "2 in 1" pixel arrangement, in this case, the two first pixel definition openings corresponding to the two green first light-emitting materials 131 in one pixel can be taken as a group, and the distances between two adjacent groups of first pixel definition openings along the first direction 1X and the second direction 1Y are arranged alternately as one large and one small. In other embodiments, a similar method can also be used for adaptive adjustment, and the present application does not limit this.

[0078] like Figure 3 and Figure 4As shown, in some embodiments, the first repeating unit 14 is centrally symmetrical about the first center 141. Specifically, the quadrilateral formed by connecting the center points of the four first light-emitting materials 131 in the first repeating unit 14 can be a general rhombus or a square, thereby making the first repeating unit 14 centrally symmetrical. That is, at this time, the first light-emitting areas 1311 of the four first light-emitting materials 131 in the first repeating unit 14 are equal in width from the edge of the first light-emitting material 131. The above-mentioned arrangement can simplify the complexity of the display panel design, thereby reducing the preparation time of the display panel. Furthermore, in the embodiment by changing the evaporation position of the first light-emitting material 131, the design of the opening of the mask plate can be simplified, thereby reducing the preparation time of the display panel; in the embodiment by changing the opening position of the first pixel definition opening, the position design of the first pixel definition opening of the pixel definition layer can be simplified, thereby reducing the preparation time of the display panel.

[0079] Continue to refer Figure 3 and Figure 4 In some embodiments, the first repeating unit 14 is symmetrical along the first direction 1X and / or the second direction 1Y. The above configuration can simplify the complexity of display panel design, thereby reducing the preparation time of the display panel. For details, please refer to the above embodiments, which will not be repeated here.

[0080] like Figure 5 As shown, in some embodiments, the difference between the width of the first non-luminous region 1312 of the first luminous material 131 away from the first center 141 and the width close to the first center 141 is 2-6 μm. Specifically, Figure 5 ΔW is 2 to 6 μm. The above setting can make it possible that during the evaporation process of the first light-emitting material 131, when the mask plate is offset in any direction, the width difference ΔW can offset the offset error to the greatest extent possible, so that at least two first light-emitting materials 131 in the first repeating unit 14 are located close to the center of the first pixel definition opening corresponding to the first light-emitting material 131, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors, but will not make the first light-emitting material 131 too large, avoiding increasing the risk of color mixing of adjacent first light-emitting materials 131 of different colors. Furthermore, the above width difference ΔW can be any value of 2 μm, 3 μm, 4 μm, 5 μm or 6 μm, and this application does not impose any limitation on this.

[0081] Continue to refer Figure 3 and Figure 4In some embodiments, in each first repeating unit 14, the first anode via hole 1313 corresponding to each first light-emitting material 131 is located in the first non-light-emitting area 1312 of the first light-emitting material 131, away from the first center 141, and the four first anode via holes 1313 are symmetrical. Among them, the first anode via hole 1313 is located in the first non-light-emitting area 1312 instead of the first light-emitting area 1311, which can increase the area ratio of the first light-emitting area 1311 to the first light-emitting material 131, thereby increasing the aperture ratio of the first light-emitting material 131, and further improving the brightness of the display panel. Since the preparation of the first anode via hole 1313 requires punching the first light-emitting material 131, the film layer of the first light-emitting material 131 around the first anode via hole 1313 is concave, and the film layer of the first light-emitting material 131 near the first anode via hole 1313 is uneven, which makes the light emission direction of the first light-emitting material 131 chaotic, thereby affecting the display effect of the display panel. Therefore, the first anode via 1313 is located in the first non-luminous area 1312 rather than the first luminous area 1311, which can also avoid the influence on the light emission direction of the first luminescent material 131, thereby improving the display effect of the display panel. Since the width of the first non-luminous area 1312 away from the first center 141 from the edge of the first luminescent material 131 is large, the first anode via 1313 is located here, which can also facilitate the preparation of the first anode via 1313. In addition, the central symmetry of the four first anode vias 1313 can reduce the four-way color deviation characteristics of the display panel and reduce the display difference of the display panel at different angles. Specifically, when the display panel is viewed from different directions, the display effect of the display panel may be different, that is, the four-way color deviation characteristics of the display panel. The four-way color deviation characteristics of the display panel are different due to the asymmetry of the internal film structure of the display panel. For example, the four-way asymmetry of the scanning line, data line or power line inside the display panel, or the four-way asymmetry of the pixel position, can all lead to the four-way color deviation characteristics of the display panel. Since the film layer of the first light-emitting material 131 is concave around the first anode via hole 1313, the interference of the light emitting direction of the first light-emitting material 131 and the reflection of the ambient light near the first anode via hole 1313 will cause the four-way color deviation of the display panel. Therefore, the four first anode via holes 1313 are arranged symmetrically, so that the interference of the first anode via hole 1313 on the light emitting direction of the first light-emitting material 131 and the reflection of the ambient light can be symmetrical, thereby reducing the four-way color deviation characteristics of the display panel and reducing the display difference of the display panel at different angles.

[0082] like Figure 6 As shown, in some embodiments, the display panel further includes: a first electrode layer 15 , a second electrode layer 16 and a second light emitting unit layer 17 .

[0083] Among them, the first electrode layer 15 is located on one side of the first pixel definition layer 12. The second electrode layer 16 is located on a side of the first pixel definition layer 12 that is different from the first electrode layer 15. The first light-emitting unit layer 13 and the second light-emitting unit layer 17 are located between the first electrode layer 15 and the second electrode layer 16. That is, in these embodiments, the display panel is a Tandem device including two light-emitting unit layers. Since the Tandem device includes two light-emitting unit layers, it is necessary to prepare the light-emitting unit layers twice, so six evaporation processes are required for three colors, and the risk of color mixing is further increased.

[0084] The second light-emitting unit layer 17 includes a plurality of second light-emitting materials 171, and each second light-emitting material 171 overlaps with a first light-emitting material 131 in a plan view. The above arrangement enables the second light-emitting unit layer 17 to adopt the same design as the first light-emitting unit layer 13 to reduce the risk of color mixing of the Tandem device, and the repeated parts are not repeated.

[0085] The display panel of the present invention uses four first light-emitting materials 131 of the same color, two each along the first direction 1X and the second direction 1Y, as a first repeating unit 14, and makes the positions of the four first light-emitting materials 131 close to the center of the first repeating unit 14. In this way, during the evaporation process of the first light-emitting material 131, when the mask plate is offset in any direction, the positions of at least two first light-emitting materials 131 in the first repeating unit 14 are close to the center of the first pixel definition opening corresponding to the first light-emitting material 131, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors.

[0086] On the other hand, Figure 7 As shown, an embodiment of the present invention further provides a method for preparing a display panel, comprising:

[0087] S110, providing a first substrate 11;

[0088] S120, preparing a first pixel definition layer 12 on one side of the first substrate 11; wherein the first pixel definition layer 12 includes a plurality of first pixel definition openings;

[0089] S130 , providing a mask plate, and using the mask plate to evaporate the first light-emitting unit layer 13 on the side of the first pixel definition layer 12 away from the first substrate 11 .

[0090] Among them, the first light-emitting unit layer 13 includes multiple first light-emitting materials 131, the first light-emitting material 131 includes a first light-emitting area 1311 and a first non-light-emitting area 1312, the first non-light-emitting area 1312 surrounds the first light-emitting area 1311, and each first light-emitting area 1311 covers a first pixel definition opening in a plan view; four adjacent first light-emitting materials 131 of the same color are used as the first repeating unit 14, the first repeating unit 14 includes two first light-emitting materials 131 of the same color adjacent to each other along a first direction 1X and two first light-emitting materials 131 of the same color adjacent to each other along a second direction 1Y, and the first direction 1X intersects with the second direction 1Y; in the first repeating unit 14, the four first light-emitting materials 131 have a first center 141, and the width of the first non-light-emitting area 1312 of the first light-emitting material 131 close to the first center 141 is smaller than the width away from the first center 141.

[0091] The specific implementation manner and technical effects of the method for manufacturing the display panel of the present invention can refer to the above-mentioned embodiment of the display panel, and the repeated parts will not be repeated.

[0092] On the other hand, Figure 8 As shown, an embodiment of the present invention further provides a display device, including the above-mentioned display panel. The display device can be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0093] The specific implementation manner and technical effects of the display device of the present invention can refer to the specific embodiments of the display panel mentioned above, and the repeated parts will not be repeated here.

[0094] In summary, the display panel, the method for preparing the display panel and the display device of the present invention, by using two first light-emitting materials 131 of the same color along the first direction 1X and the second direction 1Y, for a total of four, as a first repeating unit 14, and making the positions of the four first light-emitting materials 131 close to the center of the first repeating unit 14, so that during the evaporation process of the first light-emitting material 131, when the mask plate is offset in any direction, the positions of at least two first light-emitting materials 131 in the first repeating unit 14 are close to the center of the first pixel definition opening corresponding to the first light-emitting material 131, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors.

[0095] On the other hand, Fig. 9 , Fig.10 and Fig.11 As shown, an embodiment of the present invention provides a display panel, which includes a second substrate 21 , a second pixel definition layer 22 and a third light emitting unit layer 23 .

[0096] The second pixel definition layer 22 is located on one side of the second substrate 21 . The second pixel definition layer 22 includes a plurality of second pixel definition openings 221 for partially accommodating the third light emitting unit layer 23 .

[0097] The third light-emitting unit layer 23 is located on the side of the second pixel definition layer 22 away from the second substrate 21. The third light-emitting unit layer 23 includes a plurality of third light-emitting materials 231, and each third light-emitting material 231 is partially located in a second pixel definition opening 221. The third light-emitting unit layer 23 includes a plurality of third light-emitting materials 231, and the third light-emitting material 231 includes a second light-emitting area 2311 and a first compensation area 2312, and the first compensation area 2312 surrounds the second light-emitting area 2311, and each third light-emitting material 231 covers a second pixel definition opening 221 in a plan view. It can be understood that the area of ​​the effective electrode is equal to the area of ​​the second pixel definition opening 221. The third light-emitting material 231 includes light-emitting materials of three colors, specifically red, green and blue. In addition, the third light-emitting material 231 also includes a non-luminous area, which is used to ensure that the first light-emitting material 131 covers the first pixel definition opening.

[0098] like Fig.12 As shown, specifically, four adjacent third luminescent materials 231 of the same color are used as the second repeating unit 24, and the second repeating unit 24 includes two third luminescent materials 231 of the same color adjacent to each other along the third direction 2X and two third luminescent materials 231 of the same color adjacent to each other along the fourth direction 2Y. The third direction 2X intersects with the fourth direction 2Y. According to different pixel arrangement modes and the shapes of the third luminescent materials 231, the second repeating unit 24 may include various forms, Fig.12 In the example, only one second repeating unit 24 of the third luminescent material 231 of one color is used as an example for illustration, which is not limiting. Further, Fig.12 Take the Delta pixel arrangement adopted in the display panel as an example, but as long as the number of the third light-emitting materials 231 of the three colors is equal, the above-mentioned setting of the present application can be adopted. When the number of the third light-emitting materials 231 of the three colors is not equal, for example, the display panel adopts the "2in 1" pixel arrangement, the two green third light-emitting materials 231 in one pixel can be defined as a whole as the second repeating unit 24. That is, in this case, the second repeating unit 24 corresponding to the green third light-emitting material 231 has eight green third light-emitting materials 231. In other embodiments, the number of the third light-emitting materials 231 included in the second repeating unit 24 can be determined according to the specific pixel arrangement method, and the present application does not limit it. In addition, the third direction 2X and the fourth direction 2Y can be perpendicular or non-perpendicular, and the present application does not limit it.

[0099] Further, in the second repeating unit 24, the four third luminescent materials 231 have a second center 241, and the first compensation areas 2312 of the four third luminescent materials 231 are centrally symmetrical based on the second center 241. The above arrangement is performed by setting the first compensation area 2312 for the third luminescent material 231, and taking two third luminescent materials 231 of the same color in the third direction 2X and the fourth direction 2Y as a second repeating unit 24, and making the first compensation areas 2312 of the four third luminescent materials 231 centrally symmetrical, so that during the evaporation process of the third luminescent material 231, when the mask plate is offset in any direction (for example, the third direction 2X or the fourth direction 2Y), at least two first compensation areas 2312 of the third luminescent material 231 in the second repeating unit 24 can be used to compensate for the offset of the mask plate, so as to reduce the risk of color mixing when the adjacent first luminescent materials 131 of different colors are evaporated.

[0100] Furthermore, the above-mentioned setting can also reduce the four-way color deviation characteristics of the display panel and reduce the display difference of the display panel at different angles. Specifically, when viewed from different directions of the display panel, the display effect of the display panel may be different, which is the four-way color deviation characteristics of the display panel. The four-way color deviation characteristics of the display panel are caused by the asymmetry of the internal film structure of the display panel, resulting in different outgoing light in different directions. For example, the four-way asymmetry of the scanning line, data line or power line inside the display panel, or the four-way asymmetry of the pixel position, can all lead to the four-way color deviation characteristics of the display panel. Since the film layer of the first light-emitting material 131 is concave around the first anode via 1313, the interference of the light emission direction of the first light-emitting material 131 near the first anode via 1313 and the reflection of the ambient light will cause the four-way color deviation of the display panel. In this embodiment, since the first compensation areas 2312 of the four third light-emitting materials 231 are centrally symmetrical based on the second center 241, the arrangement of the first compensation areas 2312 can be the same when viewed from different directions of the display panel. Therefore, the light emission directions of the first compensation areas 2312 can be similar when viewed from different directions of the display panel, and the reflection of ambient light is similar, thereby reducing the four-way color deviation characteristics of the display panel and reducing the display differences at different angles of the display panel.

[0101] Continue to refer Fig.12 In some embodiments, in the second repeating unit 24, the first compensation regions 2312 of the four third light emitting materials 231 are also symmetrical along the third direction 2X and / or the fourth direction 2Y. Specifically, the quadrilateral formed by the center point connection line of the four third light emitting materials 231 in the second repeating unit 24 can be a general rhombus or a square ( Fig.12The square is taken as an example), so that the second repeating unit 24 is respectively symmetrical along the third direction 2X and / or the fourth direction 2Y. The above arrangement can simplify the complexity of the display panel design, thereby reducing the preparation time of the display panel.

[0102] It should be noted that the positional relationship between the first compensation area 2312 and the second light-emitting area 2311 may be interconnected or not; the first compensation area 2312 may emit light or not, and this application does not limit this. The following describes the above situations separately:

[0103] like Fig.13 and Fig.14 As shown, in some alternative embodiments, each third light-emitting material 231 includes four first compensation areas 2312 and a redundant area 2313, the first compensation area 2312 is not connected to the second light-emitting area 2311, the redundant area 2313 is located between the second light-emitting area 2311 and the first compensation area 2312, and the four first compensation areas 2312 are symmetrical. It can be understood that in this embodiment, the first compensation area 2312 is located at the periphery of the entire third light-emitting material 231, and the first compensation area 2312 and the redundant area 2313 will not emit light when the display panel is powered on. That is, not all parts of each first light-emitting material 131 emit light. The light-emitting area of ​​the third light-emitting material 231 of the present application, that is, the area of ​​the second light-emitting area 2311, is the same as the light-emitting area of ​​the light-emitting material in the prior art. The area of ​​the second light-emitting area 2311 is the area size of the effective electrode. In addition, the first compensation area 2312 and the redundant area 2313 are redundant parts when the third light-emitting material 231 is prepared by evaporation, and are used to ensure that the third light-emitting material 231 covers the second pixel definition opening 221. The four first compensation areas 2312 are centrally symmetrical, which can simplify the complexity of the display panel design and reduce the preparation time of the display panel. At the same time, in each third light-emitting material 231, the centrally symmetrical design of the first compensation area 2312 can also reduce the four-way color deviation characteristics of the display panel and reduce the display difference of the display panel at different angles.

[0104] Further, in some embodiments, in the third light-emitting material 231, the ratio of the width of the first compensation area 2312 to the equivalent diameter of the second light-emitting area 2311 is in the range of 5% to 30%. The above setting can make it possible that during the evaporation process of the third light-emitting material 231, when the mask plate is offset in any direction, the width of the first compensation area 2312 can offset the offset error to the greatest extent possible, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors, but will not make the first light-emitting material 131 too large, thereby avoiding increasing the risk of color mixing of adjacent first light-emitting materials 131 of different colors. The above ratio range can be any value of 5%, 10%, 15%, 20%, 25% or 30%, and the present application does not limit this.

[0105] Continue to refer Fig.11 and Fig.12 In some alternative embodiments, each third light-emitting material 231 includes four first compensation areas 2312 and a redundant area 2313, the first compensation area 2312 is connected to the second light-emitting area 2311, the redundant area 2313 surrounds the first compensation area 2312, and the four first compensation areas 2312 are symmetrical. It can be understood that in this embodiment, the redundant area 2313 is located at the outermost periphery of the entire third light-emitting material 231 and surrounds the second light-emitting area 2311 and the first compensation area 2312, and the first compensation area 2312 and the second light-emitting area 2311 will emit light when the display panel is powered on. That is, the light-emitting area of ​​the third light-emitting material 231 of the present application is larger than the light-emitting area of ​​the light-emitting material in the prior art. The sum of the sizes of the second light-emitting area 2311 and the first compensation area 2312 can also be the area size of the effective electrode. At this time, only the redundant area 2313 is the redundant part when the third light-emitting material 231 is prepared by evaporation, which is used to ensure that the third light-emitting material 231 covers the second pixel definition opening 221. The four first compensation areas 2312 are centrally symmetrical, which can simplify the design complexity of the display panel and reduce the preparation time of the display panel. At the same time, in each third luminescent material 231, the centrally symmetrical design of the first compensation area 2312 can also reduce the four-way color deviation characteristics of the display panel and reduce the display difference of the display panel at different angles.

[0106] Further, in some embodiments, the second pixel definition opening 221 includes a main area and four second compensation areas, the main area overlaps with the second light-emitting area 2311 in a plan view, and the first compensation area 2312 overlaps with the second compensation area in a plan view. It should be noted that at this time, the area of ​​the effective electrode is equal to the area of ​​the second pixel definition opening 221. The above design of the second pixel definition opening 221 is to match the above-mentioned embodiment in which the first compensation area 2312 is connected to the second light-emitting area 2311 and the first compensation area 2312 also emits light, thereby reducing the risk of color mixing of the display panel and reducing the four-way color shift characteristics of the display panel.

[0107] Further, in some embodiments, in the second pixel definition opening 221 area, the ratio of the width of the second compensation area to the equivalent diameter of the main area is in the range of 5% to 30%. It can be understood that since the main area overlaps with the second light-emitting area 2311 in a plan view, and the first compensation area 2312 overlaps with the second compensation area in a plan view, the ratio of the width of the second compensation area to the equivalent diameter of the main area is also the ratio of the equivalent diameter of the first compensation area 2312 to the second light-emitting area 2311. Fig.11, that is, the ratio of W1 to the equivalent diameter of the second light-emitting area 2311. The above setting can make it possible that during the evaporation process of the third light-emitting material 231, when the mask plate is offset in any direction, the width of the first compensation area 2312 can offset the offset error to the greatest extent possible, thereby reducing the risk of color mixing of adjacent first light-emitting materials 131 of different colors, but will not make the first light-emitting material 131 too large, thereby avoiding increasing the risk of color mixing of adjacent first light-emitting materials 131 of different colors. The above ratio range can specifically be any value of 5%, 10%, 15%, 20%, 25% or 30%, and this application does not limit this.

[0108] Continue to refer Fig.12 In some embodiments, in each second repeating unit 24, the second anode via 2314 of the third light-emitting material 231 is located in the first compensation area 2312 in a plan view, and the four second anode vias 2314 are symmetrical in center. In addition, in this embodiment, the first compensation area 2312 is connected to the second light-emitting area 2311. Since the preparation of the first anode via 1313 requires punching the first light-emitting material 131, the film layer of the first light-emitting material 131 around the first anode via 1313 is concave, and the film layer of the first light-emitting material 131 near the first anode via 1313 is uneven, which makes the light emission direction of the first light-emitting material 131 chaotic, thereby affecting the display effect of the display panel. Therefore, the central symmetry of the four second anode vias 2314 can reduce the four-directional color deviation characteristics of the display panel and reduce the display difference of the display panel at different angles. Specifically, since the film layer of the third light-emitting material 231 is concave around the second anode via 2314, the interference of the light emission direction of the third light-emitting material 231 and the reflection of the ambient light near the second anode via 2314 will cause the four-way color deviation of the display panel. Therefore, the four second anode vias 2314 are arranged symmetrically, so that the interference of the second anode via 2314 on the light emission direction of the third light-emitting material 231 and the reflection of the ambient light can be symmetrical, thereby reducing the four-way color deviation characteristics of the display panel and reducing the display difference of the display panel at different angles.

[0109] Continue to refer Fig.14In some embodiments, in each second repeating unit 24, the second anode via 2314 of the third light-emitting material 231 is located in the first compensation area 2312 in a plan view, and the four second anode vias 2314 are centrally symmetrical. In addition, in this embodiment, the first compensation area 2312 is not connected to the second light-emitting area 2311. Among them, the second anode via 2314 is located in the redundant area 2313 instead of the second light-emitting area 2311 or the first compensation area 2312, which can increase the area ratio of the second light-emitting area 2311 and the first compensation area 2312 to the third light-emitting material 231, that is, increase the area ratio of the light-emitting area to the third light-emitting material 231, thereby increasing the aperture ratio of the third light-emitting material 231, and then improving the brightness of the display panel. Since the preparation of the second anode via 2314 requires punching of the third light-emitting material 231, the film layer of the third light-emitting material 231 around the second anode via 2314 is concave, and the film layer of the third light-emitting material 231 near the second anode via 2314 is uneven, which makes the light emission direction of the third light-emitting material 231 chaotic, thereby affecting the display effect of the display panel. Therefore, the second anode via 2314 is located in the redundant area 2313 instead of the second light-emitting area 2311 or the first compensation area 2312, which can also avoid the influence on the light emission direction of the third light-emitting material 231, thereby improving the display effect of the display panel. Since the width of the first compensation area 2312 from the second light-emitting area 2311 is large, the second anode via 2314 is located here, which can also facilitate the preparation of the second anode via 2314. In addition, the four second anode vias 2314 are centrally symmetrically arranged, so that the interference of the second anode vias 2314 with the light emission direction of the third light-emitting material 231 and the reflection of the ambient light are symmetrical, thereby reducing the four-way color deviation characteristics of the display panel and reducing the display difference of the display panel at different angles.

[0110] Continue to refer Fig.11 and Fig.13 In some embodiments, the width of the first compensation region 2312 of the third light emitting material 231 is 2-6 μm. Fig.11 W1 and Fig.13 The value of W2 in the figure is 2 to 6 μm. The above setting can make it possible that during the evaporation process of the third light-emitting material 231, when the mask plate is offset in any direction, the width difference W1 or W2 can offset the offset error to the greatest extent possible, thereby reducing the risk of color mixing when the adjacent first light-emitting materials 131 of different colors are evaporated. The above width difference W1 or W2 can be any value of 2 μm, 3 μm, 4 μm, 5 μm or 6 μm, and this application does not limit this.

[0111] like Fig.15As shown, in some embodiments, the display panel further includes: a third electrode layer 25 , a fourth electrode layer 26 and a fourth light emitting unit layer 27 .

[0112] Among them, the third electrode layer 25 is located on one side of the second pixel definition layer 22. The fourth electrode layer 26 is located on a different side of the second pixel definition layer 22 from the third electrode layer 25. The third light-emitting unit layer 23 and the fourth light-emitting unit layer 27 are located between the third electrode layer 25 and the fourth electrode layer 26. That is, in these embodiments, the display panel is a Tandem device including two light-emitting unit layers. Since the Tandem device includes two light-emitting unit layers, it is necessary to prepare the light-emitting unit layers twice, so six evaporation processes are required for three colors, and the risk of color mixing is further increased.

[0113] The fourth light-emitting unit layer 27 includes a plurality of fourth light-emitting materials 271, and each fourth light-emitting material 271 overlaps with a third light-emitting material 231 in a plan view. The above arrangement enables the second light-emitting unit layer 17 to adopt the same design as the first light-emitting unit layer 13 to reduce the risk of color mixing of the Tandem device, and the repeated parts are not repeated.

[0114] The display panel of the present invention sets a first compensation area 2312 for the third light-emitting material 231, and uses two third light-emitting materials 231 of the same color along the third direction 2X and the fourth direction 2Y, for a total of four, as a second repeating unit 24, and makes the first compensation areas 2312 of the four third light-emitting materials 231 centrally symmetrical. Therefore, during the vapor deposition process of the third light-emitting material 231, when the mask plate is displaced in any direction, at least two first compensation areas 2312 of the third light-emitting material 231 in the second repeating unit 24 can be used to compensate for the displacement of the mask plate, thereby reducing the risk of color mixing when adjacent first light-emitting materials 131 of different colors are evaporated.

[0115] On the other hand, Fig.16 As shown, an embodiment of the present invention further provides a method for preparing a display panel, comprising:

[0116] S210, providing a second substrate 21;

[0117] S220, preparing a second pixel definition layer 22 on one side of the second substrate 21; wherein the second pixel definition layer 22 includes a plurality of second pixel definition openings 221;

[0118] S230 , providing a mask plate, and using the mask plate to evaporate the third light-emitting unit layer 23 on the side of the second pixel definition layer 22 away from the second substrate 21 .

[0119] Among them, the third light-emitting unit layer 23 includes multiple third light-emitting materials 231, the third light-emitting material 231 includes a second light-emitting area 2311 and a first compensation area 2312, the first compensation area 2312 surrounds the second light-emitting area 2311, and each third light-emitting material 231 covers a second pixel definition opening 221 in a plan view; four adjacent third light-emitting materials 231 of the same color are used as the second repeating unit 24, the second repeating unit 24 includes two third light-emitting materials 231 of the same color adjacent to each other along a third direction 2X and two third light-emitting materials 231 of the same color adjacent to each other along a fourth direction 2Y, and the third direction 2X intersects with the fourth direction 2Y; in the second repeating unit 24, the four third light-emitting materials 231 have a second center 241, and the first compensation areas 2312 of the four third light-emitting materials 231 are centrally symmetrical based on the second center 241.

[0120] The specific implementation manner and technical effects of the method for manufacturing the display panel of the present invention can refer to the above-mentioned embodiment of the display panel, and the repeated parts will not be repeated.

[0121] On the other hand, Fig.17 As shown, an embodiment of the present invention further provides a display device, including the above-mentioned display panel. The display device can be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0122] The specific implementation manner and technical effects of the display device of the present invention can refer to the specific embodiments of the display panel mentioned above, and the repeated parts will not be repeated.

[0123] In summary, the display panel, the method for preparing a display panel and the display device of the present invention set a first compensation area 2312 for the third light-emitting material 231, and use two third light-emitting materials 231 of the same color along the third direction 2X and the fourth direction 2Y, for a total of four, as a second repeating unit 24, and make the first compensation areas 2312 of the four third light-emitting materials 231 centrally symmetrical, so that during the evaporation process of the third light-emitting material 231, when the mask plate is shifted in any direction, there are at least two first compensation areas 2312 of the third light-emitting materials 231 in the second repeating unit 24 that can be used to compensate for the shift of the mask plate, thereby reducing the risk of color mixing when adjacent first light-emitting materials 131 of different colors are evaporated.

[0124] The above contents are further detailed descriptions of the present invention in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: a first substrate; A first pixel definition layer, located on one side of the first substrate, the first pixel definition layer comprising a plurality of first pixel definition openings; A first light-emitting unit layer is located on a side of the first pixel definition layer away from the first substrate, the first light-emitting unit layer includes a plurality of first light-emitting materials, the first light-emitting materials include a first light-emitting area and a first non-light-emitting area, the first non-light-emitting area surrounds the first light-emitting area, and each of the first light-emitting areas covers one of the first pixel definition openings in a plan view; Wherein, four adjacent first luminescent materials of the same color are used as a first repeating unit, and the first repeating unit includes two adjacent first luminescent materials of the same color along a first direction and two adjacent first luminescent materials of the same color along a second direction, and the first direction intersects with the second direction; In the first repeating unit, four first light-emitting materials have a first center, and a width of the first non-light-emitting region of the first light-emitting material close to the first center is smaller than a width of the first non-light-emitting region away from the first center.

2. The display panel according to claim 1, characterized in that: Along the first direction and the second direction, the distances between the first pixel definition openings corresponding to two adjacent first light-emitting materials of the same color are equal, and the distances between two adjacent first light-emitting materials of the same color are arranged alternately in a large and a small pattern.

3. The display panel according to claim 1, characterized in that: Along the first direction and the second direction, the distances between two adjacent first luminescent materials of the same color are equal, and the distances between the first pixel definition openings corresponding to two adjacent first luminescent materials of the same color are arranged alternately in a large and a small pattern.

4. The display panel according to claim 1, characterized in that: The first repeating unit is centrosymmetric about the first center.

5. The display panel according to claim 1, characterized in that: The first repeating unit is axisymmetric along the first direction and / or the second direction.

6. The display panel according to claim 1, characterized in that: A difference between a width of the first non-luminescent region of the first luminescent material away from the first center and a width of the first non-luminescent region close to the first center is 2-6 μm.

7. The display panel according to claim 1, characterized in that: In each of the first repeating units, a first anode via hole corresponding to each of the first light-emitting materials is located away from the first center of the first non-light-emitting region of the first light-emitting material, and the four first anode via holes are symmetrical about the center.

8. The display panel according to claim 1, characterized in that: Also includes: A first electrode layer, located on one side of the first pixel definition layer; a second electrode layer, located on a side of the first pixel definition layer different from the first electrode layer; a second light-emitting unit layer, wherein the first light-emitting unit layer and the second light-emitting unit layer are located between the first electrode layer and the second electrode layer; The second light-emitting unit layer includes a plurality of second light-emitting materials, and each of the second light-emitting materials overlaps with one of the first light-emitting materials in a plan view.

9. A method for preparing a display panel, characterized in that: include: providing a first substrate; Preparing a first pixel definition layer on one side of the first substrate; wherein the first pixel definition layer includes a plurality of first pixel definition openings; Providing a mask plate, and using the mask plate to evaporate a first light-emitting unit layer on a side of the first pixel definition layer that is away from the first substrate; The first light-emitting unit layer includes a plurality of first light-emitting materials, the first light-emitting material includes a first light-emitting area and a first non-light-emitting area, the first non-light-emitting area surrounds the first light-emitting area, and each of the first light-emitting areas covers one of the first pixel definition openings in a plan view; Four adjacent first luminescent materials of the same color are used as a first repeating unit, wherein the first repeating unit includes two adjacent first luminescent materials of the same color along a first direction and two adjacent first luminescent materials of the same color along a second direction, and the first direction intersects the second direction; In the first repeating unit, the four first light-emitting materials have a first center, and the width of the first non-light-emitting region of the first light-emitting material near the first center is smaller than the width far from the first center.

10. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 8.

11. A display panel, characterized in that: include: a second substrate; A second pixel definition layer, located on one side of the second substrate, the second pixel definition layer comprising a plurality of second pixel definition openings; A third light-emitting unit layer is located on a side of the second pixel definition layer away from the second substrate, the third light-emitting unit layer includes a plurality of third light-emitting materials, the third light-emitting materials include a second light-emitting area and a first compensation area, the first compensation area surrounds the second light-emitting area, and each of the third light-emitting materials covers one of the second pixel definition openings in a plan view; Wherein, four adjacent third luminescent materials of the same color are used as a second repeating unit, and the second repeating unit includes two adjacent third luminescent materials of the same color along a third direction and two adjacent third luminescent materials of the same color along a fourth direction, and the third direction intersects with the fourth direction; In the second repeating unit, the four third light-emitting materials have a second center, and the first compensation regions of the four third light-emitting materials are centrally symmetric based on the second center.

12. The display panel according to claim 11, characterized in that: In the second repeating unit, the four first compensation regions of the third light-emitting material are also axisymmetric along the third direction and / or the fourth direction.

13. The display panel according to claim 11, characterized in that: Each of the third light-emitting materials includes four first compensation areas and a redundant area. The first compensation area is not connected to the second light-emitting area. The redundant area is located between the second light-emitting area and the first compensation area. The four first compensation areas are centrally symmetrical.

14. The display panel according to claim 13, characterized in that: In the third light-emitting material, a ratio of a width of the first compensation region to an equivalent diameter of the second light-emitting region is in a range of 5% to 30%.

15. The display panel according to claim 11, characterized in that: Each of the third light-emitting materials includes four first compensation areas and a redundant area. The first compensation area is connected to the second light-emitting area. The redundant area surrounds the first compensation area. The four first compensation areas are centrally symmetrical.

16. The display panel according to claim 15, characterized in that: The second pixel definition opening includes a main area and four second compensation areas, the main area overlaps with the second light emitting area in a plan view, and the first compensation area overlaps with the second compensation area in a plan view.

17. The display panel according to claim 16, characterized in that: In the second pixel definition opening area, a ratio of a width of the second compensation area to an equivalent diameter of the main body area is in a range of 5% to 30%.

18. The display panel according to claim 11, characterized in that: In each of the second repeating units, the second anode via hole of the third light emitting material is located in the first compensation region in a plan view, and the four second anode via holes are centrally symmetrical.

19. The display panel according to claim 11, characterized in that: The width of the first compensation region of the third light-emitting material is 2-6 μm.

20. The display panel according to claim 11, characterized in that: Also includes: a third electrode layer, located on one side of the second pixel definition layer; a fourth electrode layer, located on a side of the second pixel definition layer different from the third electrode layer; a fourth light-emitting unit layer, wherein the third light-emitting unit layer and the fourth light-emitting unit layer are located between the third electrode layer and the fourth electrode layer; The fourth light-emitting unit layer includes a plurality of fourth light-emitting materials, and each of the fourth light-emitting materials overlaps with one of the third light-emitting materials in a plan view.

21. A method for preparing a display panel, characterized in that: include: providing a second substrate; Preparing a second pixel definition layer on one side of the second substrate; wherein the second pixel definition layer includes a plurality of second pixel definition openings; Providing a mask plate, and using the mask plate to evaporate a third light-emitting unit layer on a side of the second pixel definition layer away from the second substrate; The third light-emitting unit layer includes a plurality of third light-emitting materials, the third light-emitting materials include a second light-emitting area and a first compensation area, the first compensation area surrounds the second light-emitting area, and each of the third light-emitting materials covers one of the second pixel definition openings in a plan view; Four adjacent third luminescent materials of the same color are used as a second repeating unit, wherein the second repeating unit includes two adjacent third luminescent materials of the same color along a third direction and two adjacent third luminescent materials of the same color along a fourth direction, and the third direction intersects the fourth direction; In the second repeating unit, the four third light-emitting materials have a second center, and the first compensation regions of the four third light-emitting materials are centrally symmetric based on the second center.

22. A display device, characterized in that: Comprising the display panel according to any one of claims 11 to 20.

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