Display panel and display device

Abstract

The invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the light extraction efficiency and improve the problem of rainbow lines. The display panel comprises a driving substrate, a planarization layer and a light-emitting device, the planarization layer is arranged on one side of the driving substrate, a plurality of grooves are formed in the surface of the side, away from the driving substrate, of the planarization layer, orthographic projections of the grooves on the driving substrate are pentagonal, the grooves are arranged in a sealed connection mode, and the light-emitting device is arranged on the planarization layer. The boundary lengths of every two adjacent grooves are equal and coincide. The light-emitting device is arranged on the side, away from the driving substrate, of the planarization layer, and the orthographic projection of the light-emitting device on the driving substrate covers the orthographic projections of the grooves on the driving substrate. At least part of the light-emitting device is located in the multiple grooves, so that the surface of the side, away from the driving substrate, of the light-emitting device forms a concave shape.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Currently, in display products, the display brightness of a display panel can be improved by using a microlens array. However, current microlens arrays often have a single structure and a small period, which easily causes rainbow patterns on the display panel. Summary of the Invention

[0003] The present application proposes a display panel and a display device, aiming to improve light extraction efficiency and alleviate the rainbow pattern problem.

[0004] To achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0005] In one aspect, a display panel is provided, including a driving substrate, a planarization layer, and a light-emitting device.

[0006] Among them, the planarization layer is arranged on one side of the driving substrate, and a plurality of grooves are provided on the surface of the planarization layer away from the driving substrate. The shape of the positive projection of the grooves on the driving substrate is a pentagon. The plurality of grooves are arranged closely, and the boundary lengths of two adjacent grooves are equal and overlap.

[0007] The light-emitting device is disposed on a side of the planarization layer away from the driver substrate. The orthographic projection of the light-emitting device on the driver substrate overlaps the orthographic projections of the plurality of grooves on the driver substrate. At least a portion of the light-emitting device is located within the plurality of grooves, resulting in a concave surface of the light-emitting device on the side away from the driver substrate.

[0008] In the above-mentioned embodiments of the present application, the planarization layer and the light-emitting device both have a groove morphology. Based on this, the light-emitting portion of the light-emitting device can be located at different angles and can emit light at different angles, which is beneficial to reducing total reflection at the interface. Moreover, under the groove morphology of the planarization layer and the light-emitting device, when part of the light that undergoes total reflection passes through the planarization layer and the light-emitting device, the light that undergoes total reflection will be reflected again after the reflection angle is changed, which is beneficial to improving the light extraction efficiency. The shape of the positive projection of the groove on the driving substrate is a pentagon, that is, the boundary shape of the groove is a pentagon, and the boundaries of multiple pentagons are closely connected to each other. Multiple pentagons are closely arranged in all directions, without symmetry and no symmetrical structure. A close arrangement of multi-angle graphics can be achieved within a single pixel, disrupting the smaller period of the light extraction structure in the related art, and effectively improving the rainbow pattern phenomenon.

[0009] In some embodiments, the five sides of the groove include a first side, a second side, a third side, a fourth side, and a fifth side, wherein the lengths of the second side, the third side, the fourth side, and the fifth side are all equal and unequal to the length of the first side.

[0010] The plurality of grooves include at least a first groove and five second grooves adjacent to the first groove. A first side of the first groove is equal to and coincides with a first side of one of the five second grooves.

[0011] In some embodiments, the inner angle vertices of the pentagons of at least three grooves coincide and are spliced ​​to form 360°.

[0012] In some embodiments, the angle of the first internal angle between the first side and the second side is A1, the angle of the second internal angle between the second side and the third side is B1, the angle of the third internal angle between the third side and the fourth side is C1, the angle of the fourth internal angle between the fourth side and the fifth side is D1, and the angle of the fifth internal angle between the fifth side and the first side is E1.

[0013] There are three grooves, and the first interior angle of the pentagon of the two grooves coincides with the third interior angle vertex of the pentagon of the one groove, and 2*A1+C1=360°. Alternatively, the fifth interior angle of the pentagon of the two grooves coincides with the fourth interior angle vertex of the pentagon of the one groove, and 2*E1+D1=360°.

[0014] Or, there are four grooves, the second inner angles of the pentagons of two grooves, the third inner angle of the pentagon of one groove, and the fourth inner angle of the pentagon of one groove coincide with each other, and 2*B1+C1+D1=360°.

[0015] In some embodiments, the first interior angle is 109.10°, the second interior angle is 77.25°, the third interior angle is 141.8°, the fourth interior angle is 63.70°, and the fifth interior angle is 148.15°. Alternatively, the first interior angle is 114.32°, the second interior angle is 79.32°, the third interior angle is 131.36°, the fourth interior angle is 70°, and the fifth interior angle is 145°.

[0016] In some embodiments, the five sides of the groove are all equal in length.

[0017] In some embodiments, the angle of the first internal angle between the first side and the second side of the five sides is A2, the angle of the second internal angle between the second side and the third side is B2, the angle of the third internal angle between the third side and the fourth side is C2, the angle of the fourth internal angle between the fourth side and the fifth side is D2, and the angle of the fifth internal angle between the fifth side and the first side is E2.

[0018] There are three grooves. The first interior angle of the pentagon of one groove, the second interior angle of the pentagon of one groove, and the fifth interior angle of the pentagon of one groove coincide with each other, and A² + B² + E² = 360°. Alternatively, the second interior angle of the pentagon of one groove and the fourth interior angle of the pentagons of two grooves coincide with each other, and B² + 2*D² = 360°. Alternatively, the third interior angle of the pentagon of one groove and the fifth interior angle of the pentagons of two grooves coincide with each other, and C² + 2*E² = 360°.

[0019] Alternatively, there are four grooves, and the first interior angle of the pentagon of one groove, the third interior angle of the pentagon of two grooves, and the fifth interior angle of the pentagon of one groove coincide with each other, and A² + 2*C² + E² = 360°. Alternatively, the first interior angle of the pentagon of two grooves, the second interior angle of the pentagon of one groove, and the third interior angle of the pentagon of one groove coincide with each other, and 2*A² + B² + C² = 360°. Alternatively, the first interior angle of the pentagon of one groove and the fourth interior angle of the pentagon of three grooves coincide with each other, and A² + 3*D² = 360°. Alternatively, the third interior angle of the pentagon of two grooves and the fourth interior angle of the pentagon of two grooves coincide with each other, and 2*C² + 2*D² = 360°. Or, the first interior angles of the two grooves' pentagons, the fourth interior angle of one groove's pentagon, and the fifth interior angle of one groove's pentagon coincide with each other, and 2*A2+D2+E2=360°.

[0020] Alternatively, there are five grooves, and the first interior angle of the three-grooved pentagon, the third interior angle of the one-grooved pentagon, and the fourth interior angle of the one-grooved pentagon coincide with each other, and 3*A²+C²+D²=360°. Alternatively, the first interior angle of the two-grooved pentagon and the third interior angle of the three-grooved pentagon coincide with each other, and 2*A²+3*C²=360°.

[0021] Alternatively, there are six grooves, the first interior angle vertices of the pentagons of the six grooves coincide, and 6*A2=360°.

[0022] In some embodiments, the first interior angle is 60°, the second interior angle is 160°, the third interior angle is 80°, the fourth interior angle is 100°, and the fifth interior angle is 140°.

[0023] In some embodiments, the display panel further comprises a pixel defining layer disposed on a side of the planarization layer away from the drive substrate. The pixel defining layer has a plurality of openings extending therethrough, with one light-emitting device disposed within each opening. Each opening exposes a plurality of grooves, and the arrangement patterns of the grooves within different openings are different.

[0024] In some embodiments, the display panel further comprises a pixel defining layer disposed on a side of the planarization layer away from the driver substrate. The pixel defining layer comprises a plurality of openings extending therethrough, with each light-emitting device disposed within one of the openings. The openings are positioned at different angles parallel to the driver substrate. There are at least two openings, one of which is rotated to have the same angle as the other opening.

[0025] In some embodiments, there are at least two openings, and one of the openings is rotated to any angle between 0° and 30° to have the same placement angle as the other opening.

[0026] In some embodiments, the surface slope angle of the groove gradually increases from the center of the groove to the boundary.

[0027] In some embodiments, the planarization layer includes a first surface away from the driving substrate, the groove extends from the first surface into the planarization layer, and the angle between the connecting line of the bottom center point of the groove and the boundary of the groove and the first surface ranges from 0 to 80 degrees.

[0028] In some embodiments, the light-emitting device includes a first electrode layer, a light-emitting layer, and a second electrode layer that are stacked together, and the first electrode layer, the light-emitting layer, and the second electrode layer are at least partially located in multiple grooves, so that the surface of the light-emitting layer away from the driving substrate forms a concave morphology.

[0029] In some embodiments, the display panel further includes an encapsulation layer, and the encapsulation layer fills the recess of the light-emitting device.

[0030] On the other hand, the present application also provides a display device, which includes the display panel and a controller in any one embodiment of the first aspect above, and the controller is electrically connected to the display panel.

[0031] The display device has the same structure and beneficial technical effects as the display panels provided in some of the above embodiments, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the technical solutions of this application, the following briefly introduces the drawings required for use in some embodiments of this application. Obviously, the drawings described below are only drawings of some embodiments of this application. For those skilled in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and do not represent the actual dimensions of the products or the actual processes of the methods involved in the embodiments of this application.

[0033] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0034] Figure 2 A pentagonal schematic diagram of an orthographic projection of a groove on a driving substrate;

[0035] Figure 3 For multiple Figure 2 Schematic diagram of the pattern after the pentagons are closely arranged;

[0036] Figure 4 is a pentagonal schematic diagram of the orthographic projection of another groove on the driving substrate;

[0037] Figure 5 For multiple Figure 4 A schematic diagram of a pattern after the pentagons are closely arranged is shown;

[0038] Figure 6 For multiple Figure 4 The schematic diagram of another pattern after the pentagons are closely arranged is shown;

[0039] Figure 7 for Figure 3 Schematic diagram of the expanded pattern of the shown pattern;

[0040] Figure 8 This is a schematic diagram of the placement angles of the two openings;

[0041] Figure 9 for Figure 1 A schematic cross-sectional view of a planarization layer in the display panel shown;

[0042] Figure 10 This is a structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, not all embodiments. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0044] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, that is, meaning "including, but not limited to."

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0046] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed connection, detachable connection, or integration; it can be directly connected or indirectly connected through an intermediate medium. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other.

[0047] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0048] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0049] Exemplary embodiments are described herein with reference to cross-sectional views that are idealized exemplary drawings. In the drawings, the thickness of layers and the areas of regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0050] With technological advancements, the demand for display brightness in display products is increasing. Taking organic light-emitting diode (OLED) display products as an example, light extraction structures, such as microlens arrays, are generally used to enhance the display brightness of OLED display panels. However, current microlens arrays often have a single structure and a small period, which can easily cause rainbow patterns and affect the display quality.

[0051] Based on this, the present application provides a display panel, such as Figures 1 to 3 As shown, Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2 This is a pentagonal schematic diagram of the orthographic projection of a groove on the driving substrate. Figure 3 For multiple Figure 2 Schematic diagram of the pattern after the pentagons are closely arranged.

[0052] like Figure 1As shown, the display panel 1 includes a driving substrate 10 , a planarization layer 20 and a light emitting device 30 .

[0053] The planarization layer 20 is disposed on one side of the driving substrate 10. The planarization layer 20 includes a first surface F1 away from the driving substrate 10. A plurality of grooves M1 are disposed on the first surface F1 of the planarization layer 20. The grooves M1 extend from the first surface F1 into the planarization layer 20. Figure 2 As shown in FIG. 1 , the orthographic projection of the groove M1 on the driving substrate 10 is a pentagon. Figure 1 and Figure 2 It can be understood that the groove M1 has a concave middle and convex edges. Figure 2 The pentagon shown is the orthographic projection of the boundary of the groove M1 on the driving substrate 10 .

[0054] The material of the planarization layer 20 may include photoresist, and a plurality of grooves M1 may be formed on the surface of the planarization layer 20 based on a photolithography process using a mask having a special pattern. Alternatively, the material of the planarization layer 20 may include an insulating material, such as at least one of silicon oxide, silicon nitride, or silicon oxynitride, and the plurality of grooves M1 of the planarization layer 20 may be formed by combining a photolithography process with a dry etching process.

[0055] The multiple grooves M1 are closely arranged, and the boundary lengths of two adjacent grooves M1 are equal and overlap, that is, the multiple grooves M1 are seamlessly spliced. After the multiple grooves M1 are seamlessly spliced, the orthographic projection pattern on the drive substrate 10 is Figure 2 The pentagon shown is used as the basis and its rotated or mirrored variants are seamlessly joined.

[0056] For example, multiple identical pentagons can be seamlessly joined with their rotated or mirrored counterparts to form Figure 3 The pattern shown does not have symmetry. Figure 3 The pattern within a dotted box (or the shaded pattern) can be considered a repeating unit formed by stitching together multiple pentagons and their variations. Based on this repeating unit, the pattern can be further spliced ​​and expanded. Because this repeating unit is not symmetrical, the resulting pattern is also not symmetrical.

[0057] like Figure 1 As shown, the light-emitting device 30 is disposed on the side of the planarization layer 20 away from the drive substrate 10. The orthographic projection of the light-emitting device 30 on the drive substrate 10 covers the orthographic projections of the plurality of grooves M1 on the drive substrate 10. At least a portion of the light-emitting device 30 is located within the plurality of grooves M1, so that the surface of the light-emitting device 30 away from the drive substrate 10 forms a concave topography.

[0058] In the above-described embodiment of the present application, both the planarization layer 20 and the light-emitting device 30 have grooved morphologies. Based on this, the light-emitting portion of the light-emitting device 30 can be positioned at different angles, emitting light at different angles, which helps reduce total internal reflection at the interface. Furthermore, due to the grooved morphologies of the planarization layer 20 and the light-emitting device 30, some of the light that undergoes total internal reflection will be re-reflected at a different angle after passing through the planarization layer 20 and the light-emitting device 30, thereby improving light extraction efficiency.

[0059] In the related art, a display panel uses a microlens array to improve display brightness. However, a light extraction structure in the microlens array is usually a square or a regular hexagon, and its symmetry and periodicity easily produce rainbow patterns.

[0060] In this embodiment, based on the asymmetric pattern formed by the close arrangement and seamless splicing of the grooves M1 in all directions, the light-emitting device 30 has an asymmetric structure, which can achieve a close arrangement of multi-angle graphics within a single pixel, disrupting the smaller period of the light extraction structure in the related art and effectively improving the rainbow pattern phenomenon.

[0061] The five sides of the groove M1 (ie, the five boundaries of the groove M1 ) include a first side L1 , a second side L2 , a third side L3 , a fourth side L4 and a fifth side L5 . The five sides here correspond to the five sides of the pentagon in sequence.

[0062] In some embodiments, as Figure 2 As shown, the lengths of the second side L2 , the third side L3 , the fourth side L4 and the fifth side L5 of the pentagon are all equal, and are not equal to the length of the first side L1 .

[0063] like Figure 3 As shown, the plurality of grooves M1 include at least a first groove M11 and five second grooves M12 adjacent to the first groove M11. The first side L1 of the first groove M11 is equal in length to and coincides with the first side L1 of one of the five second grooves M12.

[0064] The term "adjacent" here may be understood as a certain side of the first groove M11 overlapping with a certain side of the second groove M12.

[0065] Since the length of the first side L1 is not equal to the lengths of the other four sides, in order to ensure seamless splicing of multiple grooves M1, the angle of the second groove M12 needs to be adjusted on the side of the first side L1 of the first groove M11 so that the first side L1 of the second groove M12 coincides with the first side L1 of the first groove M11, thereby avoiding the unequal lengths of adjacent boundaries of two adjacent grooves, and thus ensuring a seamless splicing effect.

[0066] In some embodiments, as Figure 3As shown, the inner angle vertices of the pentagons of at least three grooves M1 coincide and are spliced ​​to form 360°. That is, seamless splicing can be achieved at any splicing vertex by at least three grooves M1.

[0067] For example, Figure 2 As shown, the angle of the first internal angle between the first side L1 and the second side L2 of the pentagon is A1, the angle of the second internal angle between the second side L2 and the third side L3 is B1, the angle of the third internal angle between the third side L3 and the fourth side L4 is C1, the angle of the fourth internal angle between the fourth side L4 and the fifth side L5 is D1, and the angle of the fifth internal angle between the fifth side L5 and the first side L1 is E1.

[0068] like Figure 3 As shown, there are three grooves M1 , wherein the first inner angles of the pentagons of two grooves M1 coincide with the third inner angle vertex of the pentagon of one groove M1 , and 2*A1+C1=360°.

[0069] Alternatively, the fifth inner angles of the pentagons of the two grooves M1 coincide with the fourth inner angle vertex of the pentagon of the one groove M1, and 2*E1+D1=360°.

[0070] Alternatively, there are four grooves M1 , wherein the second inner angles of the pentagons of two grooves M1 , the third inner angle of the pentagon of one groove M1 , and the fourth inner angle of the pentagon of one groove M1 coincide with each other, and 2*B1+C1+D1=360°.

[0071] Based on the above-mentioned angle relationship, by rotating or mirroring the pentagon, seamless splicing of multiple grooves M1 can be achieved at any inner angle vertex position.

[0072] In some embodiments, the first interior angle is 109.10°, the second interior angle is 77.25°, the third interior angle is 141.8°, the fourth interior angle is 63.70°, and the fifth interior angle is 148.15°. Alternatively, in other embodiments, the first interior angle is 114.32°, the second interior angle is 79.32°, the third interior angle is 131.36°, the fourth interior angle is 70°, and the fifth interior angle is 145°.

[0073] The lengths of the second side L2, the third side L3, the fourth side L4, and the fifth side L5 can be any value within the range of 2 μm to 6 μm, for example, 2 μm, 3 μm, 4 μm, 5 μm, or 6 μm. By adjusting the side lengths of the pentagon, the groove profile of the light-emitting device 30 can be adjusted, which helps to make the groove profiles of different light-emitting devices 30 inconsistent, disrupt the periodicity and symmetry, and help alleviate the rainbow pattern problem.

[0074] In some embodiments, as Figures 4 to 6 As shown, Figure 4 This is a pentagonal schematic diagram of another groove's orthographic projection on the drive substrate. Figure 5 For multiple Figure 4 The schematic diagram of a pattern after the pentagons are closely arranged is shown in the figure. Figure 6 For multiple Figure 4 Schematic diagram of another pattern after the pentagons are closely arranged.

[0075] like Figure 4 As shown, the five sides of the groove M1 are all equal in length, that is, the pentagon is an equilateral pentagon. For example, the length of each side can be any value in the range of 1 μm to 10 μm, such as 1 μm, 3 μm, 7 μm, 9 μm or 10 μm.

[0076] Since the five sides of an equilateral pentagon are of equal length, they are not restricted by side length during the seamless splicing process. The angle of the pentagon can be adjusted at any inner corner vertex to ensure 360° seamless splicing of the splicing vertex.

[0077] For example, Figure 4 As shown, the angle of the first internal angle between the first side L1 and the second side L2 of the five sides is A2, the angle of the second internal angle between the second side L2 and the third side L3 is B2, the angle of the third internal angle between the third side L3 and the fourth side L4 is C2, the angle of the fourth internal angle between the fourth side L4 and the fifth side L5 is D2, and the angle of the fifth internal angle between the fifth side L5 and the first side L1 is E2.

[0078] The pentagon and its mirror image are connected side by side and extended to form a Figure 5 or Figure 6 The pattern shown does not have symmetry.

[0079] For example, Figure 5 Middle joint P1 or Figure 6 At the middle joint Q1, there are three grooves M1. The first inner angle of the pentagon of one groove M1, the second inner angle of the pentagon of one groove M1, and the fifth inner angle vertex of the pentagon of one groove M1 coincide with each other, and A2+B2+E2=360°.

[0080] Or, as Figure 5 P2 or Figure 6 At the middle joint Q2, the second inner angle of the pentagon of one groove M1 and the fourth inner angle vertex of the pentagon of two grooves M1 coincide with each other, and B2+2*D2=360°.

[0081] Or, as Figure 5At the middle joint P3, there are three grooves M1, where the third inner angle of the pentagon of one groove M1 coincides with the fifth inner angle vertices of the pentagons of two grooves M1, and C2+2*E2=360°.

[0082] Or, as Figure 5 The splicing point P4 or Figure 6 At the middle joint Q3, there are four grooves M1. The first inner angle of the pentagon of one groove M1, the third inner angles of the pentagons of two grooves M1, and the fifth inner angle of the pentagon of one groove M1 coincide with each other, and A2+2*C2+E2=360°.

[0083] Or, as Figure 5 At the middle joint P5, the first inner angles of the pentagons of the two grooves M1, the fourth inner angle of the pentagon of one groove M1, and the fifth inner angle of the pentagon of one groove M1 coincide with each other, and 2*A2+D2+E2=360°.

[0084] Or, as Figure 6 At the middle joint Q4, the third inner angle of the pentagon of the two grooves M1 and the fourth inner angle vertex of the pentagon of the two grooves M1 coincide with each other, and 2*C2+2*D2=360°.

[0085] Similarly, in other examples, there are four grooves M1, where the first interior angles of the pentagons of two grooves M1, the second interior angle of the pentagon of one groove M1, and the third interior angle of the pentagon of one groove M1 coincide, and 2*A2+B2+C2=360°. Alternatively, the first interior angle of the pentagon of one groove M1 and the fourth interior angles of the pentagons of three grooves M1 coincide, and A2+3*D2=360°.

[0086] Alternatively, in another example, there are five grooves M1, and the first interior angles of the pentagons of three grooves M1, the third interior angle of the pentagon of one groove M1, and the fourth interior angle of the pentagon of one groove M1 coincide with each other, and 3*A2+C2+D2=360°. Alternatively, the first interior angles of the pentagons of two grooves M1 and the third interior angles of the pentagons of three grooves M1 coincide with each other, and 2*A2+3*C2=360°.

[0087] Or, if Figure 5 or Figure 6 At the shaded position, there are six grooves M1, the first internal angle vertices of the pentagons of the six grooves M1 coincide, and 6*A2=360°.

[0088] For example, Figure 5 or Figure 6As shown, the first interior angle of the pentagon is 60°, the second interior angle is 160°, the third interior angle is 80°, the fourth interior angle is 100°, and the fifth interior angle is 140°. The first interior angle vertices of the six pentagons coincide and form the central pattern (shaded area). The remaining pentagons or their rotated mirror images are arranged along this central pattern, edge to edge and corner to corner, extending outward.

[0089] In some embodiments, as Figure 1 As shown, the display panel 1 further includes a pixel defining layer 40, which is disposed on a side of the planarization layer 20 away from the drive substrate 10. The pixel defining layer 40 is provided with a plurality of openings K1 extending therethrough, and a light-emitting device 30 is disposed within each opening K1. Each opening K1 exposes a plurality of grooves M1, and the arrangement pattern of the grooves M1 within different openings K1 varies.

[0090] Each opening K1 exposes multiple grooves M1, and the light-emitting device 30 is located within the opening K1. This allows the light-emitting device 30 to continue the morphology formed by the close arrangement of multiple grooves M1. Based on the groove morphology of the light-emitting device 30, the light-emitting portion of the light-emitting device 30 can be located at different angles, and light can be emitted at different angles, which helps to reduce total internal reflection at the interface. In addition, under the groove morphology of the planarization layer 20 and the light-emitting device 30, some of the light that undergoes total internal reflection will be reflected again after changing the reflection angle when passing through the planarization layer 20 and the light-emitting device 30, which helps to improve light extraction efficiency.

[0091] The different arrangement patterns of the multiple grooves M1 in different openings K1 can make the groove morphologies of different light-emitting devices 30 different, which can greatly weaken the periodic repetitive structure, help disrupt the periodicity and symmetry of the sub-pixels on the display panel 1, and help alleviate the rainbow pattern problem.

[0092] The arrangement pattern of the multiple grooves M1 in an opening K1 can be Figure 3 、 Figure 5 or Figure 6 The pattern formed by the closely packed pentagons shown has the same pattern in areas of the same size.

[0093] like Figure 7 As shown, Figure 7 for Figure 3 The extended pattern diagram of the pattern shown, that is, Figure 3 Multiple repeating units can be spliced ​​together to form Figure 7 The pattern shown.

[0094] In some embodiments, in the opening K1 corresponding to a certain light emitting device 30 , the arrangement pattern of the grooves M1 is shown in region N1 , and in the opening K1 corresponding to another light emitting device 30 , the arrangement pattern of the grooves M1 is shown in region N2 .

[0095] In the pattern formed by the expansion of the closely packed pentagonal arrangement, a part of the pattern is selected according to the size of the sub-pixel as the groove morphology of the light-emitting device 30 of the sub-pixel. Different sub-pixels select different parts of the pattern, which can make the groove morphology of the light-emitting devices 30 of different sub-pixels different, and can greatly weaken the periodic repetitive structure, which is conducive to disrupting the periodicity and symmetry of the sub-pixels on the display panel 1, and is conducive to improving the rainbow pattern phenomenon.

[0096] In some embodiments, as Figure 8 As shown, Figure 8 A schematic diagram showing the placement angles of the two openings.

[0097] Along a direction parallel to the driving substrate 10 (eg, the Y-axis direction), different openings K1 are placed at different angles. There are at least two openings, and one of the openings is rotated to have the same placement angle as the other opening.

[0098] like Figure 8 As shown, one of the openings is marked as the first opening K11, and its placement angle is used as a reference (ie, its placement angle is 0), and the other opening is marked as the second opening K12, and its placement angle is θ.

[0099] Exemplarily, the value range of θ is 0-30°, that is, after the first opening K11 is rotated by any angle between 0-30°, the placement angle is the same as that of the second opening K12.

[0100] This solution can make the groove patterns of the light-emitting devices 30 of different sub-pixels different, thereby facilitating avoiding duplication between sub-pixels, disrupting periodicity and symmetry, and improving the rainbow pattern phenomenon.

[0101] In some embodiments, as Figure 1 As shown, the surface slope angle of the groove M1 gradually increases from the center of the groove M1 to the boundary.

[0102] In some embodiments, as Figure 1 As shown, the light-emitting device 30 includes a first electrode layer 31, a light-emitting layer 32 and a second electrode layer 33 which are stacked. The first electrode layer 31, the light-emitting layer 32 and the second electrode layer 33 are at least partially located in a plurality of grooves M1, so that the surface of the light-emitting layer 32 away from the driving substrate 10 forms a concave morphology.

[0103] For example, the first electrode layer 31 may be an anode, and the anode material may be a transparent conductive material, such as ITO, IZO, or IGZO. In contrast, the second electrode layer 33 may be a cathode, and the second electrode layer 33 may be an opaque high-reflectivity film, and its material may include at least one of aluminum or silver.

[0104] Here, “the center of the groove M1 ” refers to the bottom center of the groove M1 , and the distance between the bottom center and the first surface F1 is greater than or equal to the distance between other positions on the groove M1 and the first surface F1 .

[0105] like Figure 9 As shown, Figure 9 for Figure 1 Figure 2 shows a schematic cross-section of the planarization layer in a display panel, where an auxiliary line X1 is parallel to the first surface F1, point S1 corresponds to the bottom center of groove M1, and point S2 corresponds to a point on the edge of groove M1. The angle between the tangent line X1 and any point on the arc between points S1 and S2 is the surface slope angle of groove M1 at that location.

[0106] The surface slope angle of the groove M1 gradually increases, thereby forming a concave slope surface. In some embodiments, the slope angle is the largest at point S2, and the slope angle ranges from 30° to 60°, such as 30°, 40°, 45°, 50°, ..., 60°.

[0107] The concave surface shape facilitates the formation of a concave topography within the light-emitting component of the light-emitting device 30, thereby converging the light emitted by the light-emitting device 30 and improving light extraction efficiency. However, if the slope at the groove boundary is too shallow, light that has undergone total internal reflection may not be extracted, hindering the achievement of a good lighting effect. Conversely, if the slope at the groove boundary is too steep, light may be reflected multiple times within the groove topography, resulting in light loss.

[0108] In some embodiments, as Figure 9 As shown, the angle between the connecting line of the bottom center point S1 of the groove M1 and the boundary of the groove M1 and the first surface is a, and the value of a ranges from 0 to 80°, for example, 10°, 15°, 30°, 45°...80°.

[0109] The value of a reflects the aspect ratio of the groove M1. Given a constant groove M1 depth, a value of a that is too small will result in a larger groove M1 boundary. At the same pixel size, the density of the grooves M1 will be low, and the light extraction efficiency will be relatively low. Given a constant groove M1 boundary, a value of a that is too large will result in a larger groove M1 depth, which in turn will increase the thickness of the planarization layer 20, hindering the thinness and light reduction of the display panel 1.

[0110] In some embodiments, as Figure 1As shown, the display panel 1 further includes an encapsulation layer 50, which fills the recessed portion of the light-emitting device 30. The encapsulation layer 50 covers the light-emitting device 30, thereby preventing moisture or oxygen from the external environment from entering the display panel and damaging the organic material in the light-emitting device 30, thereby improving the reliability and service life of the display panel.

[0111] For example, Figure 1 As shown, the encapsulation layer 50 includes a first encapsulation layer 51, a second encapsulation layer 52, and a third encapsulation layer 53. For example, the material of the first encapsulation layer 51 includes an inorganic material, and a film layer with uniform thickness can be formed by a plasma chemical vapor deposition process. The material of the second encapsulation layer 52 includes an organic material, and a film layer with a flat surface can be formed by an inkjet printing process. The material of the third encapsulation layer 53 includes an inorganic material.

[0112] On the other hand, the present application also provides a display device, such as Figure 10 As shown, Figure 10 This is a structural diagram of a display device provided in an embodiment of the present application.

[0113] The display device 2 includes the display panel 1 in any one of the embodiments of the first aspect and a controller 3. The controller 3 is electrically connected to the display panel 1 and is used to control the display panel 1 to display images.

[0114] In the display device 2, the light-emitting device 30 of the display panel 1 has a morphology of multiple grooves seamlessly spliced ​​together. The light-emitting portion of the light-emitting device 30 can be located at different angles and can emit light at different angles, which is beneficial to reducing total reflection at the interface. Moreover, under the groove morphology of the planarization layer 20 and the light-emitting device 30, when part of the light that undergoes total reflection passes through the planarization layer 20 and the light-emitting device 30, the total reflected light will be reflected again after the reflection angle is changed, which is beneficial to improving the light extraction efficiency. In addition, the asymmetric pattern formed by the close arrangement and seamless splicing in all directions, the light-emitting device 30 is an asymmetric structure, and a close arrangement of multi-angle graphics can be achieved within a single pixel, disrupting the smaller period of the light extraction structure in the related art, and effectively improving the rainbow pattern phenomenon.

[0115] The display device 2 can be applied to display devices such as mobile phones, tablets, computers, and televisions, and is beneficial for improving light extraction efficiency and improving rainbow pattern problems.

[0116] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in this application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A display panel, characterized in that: include: Driver substrate; a planarization layer disposed on one side of the drive substrate, wherein a surface of the planarization layer away from the drive substrate is provided with a plurality of grooves, wherein the orthographic projections of the grooves on the drive substrate are pentagonal in shape, the plurality of grooves are closely arranged, and the boundary lengths of two adjacent grooves are equal and overlap; A light-emitting device is arranged on a side of the planarization layer away from the driving substrate; the orthographic projection of the light-emitting device on the driving substrate covers the orthographic projections of the multiple grooves on the driving substrate; at least part of the light-emitting device is located in the multiple grooves, so that the surface of the light-emitting device away from the driving substrate forms a concave morphology.

2. The display panel according to claim 1, wherein: The five sides of the groove include a first side, a second side, a third side, a fourth side and a fifth side, and the lengths of the second side, the third side, the fourth side and the fifth side are all equal and unequal to the length of the first side; The plurality of grooves include at least a first groove and five second grooves adjacent to the first groove; a first side of the first groove is equal to and overlaps with a first side of one of the five second grooves.

3. The display panel according to claim 2, wherein: The inner angle vertices of the pentagons of at least three grooves coincide and are spliced ​​to form 360°.

4. The display panel according to claim 3, wherein: The first internal angle between the first side and the second side is A1, the second internal angle between the second side and the third side is B1, the third internal angle between the third side and the fourth side is C1, the fourth internal angle between the fourth side and the fifth side is D1, and the fifth internal angle between the fifth side and the first side is E1; There are three grooves, the first interior angle of the pentagon of the two grooves coincides with the third interior angle vertex of the pentagon of the one groove, and 2*A1+C1=360°; or, the fifth interior angle of the pentagon of the two grooves coincides with the fourth interior angle vertex of the pentagon of the one groove, and 2*E1+D1=360°; Or, there are four grooves, the second inner angles of the pentagons of two grooves, the third inner angle of the pentagon of one groove, and the fourth inner angle of the pentagon of one groove coincide with each other, and 2*B1+C1+D1=360°.

5. The display panel according to claim 4, wherein: The first interior angle is 109.10°, the second interior angle is 77.25°, the third interior angle is 141.8°, the fourth interior angle is 63.70°, and the fifth interior angle is 148.15°; or The angle of the first internal angle is 114.32°, the angle of the second internal angle is 79.32°, the angle of the third internal angle is 131.36°, the angle of the fourth internal angle is 70°, and the angle of the fifth internal angle is 145°.

6. The display panel according to claim 1, wherein: The five sides of the groove are all equal in length.

7. The display panel according to claim 6, wherein: The first interior angle between the first and second sides of the five sides is A2, the second interior angle between the second and third sides is B2, the third interior angle between the third and fourth sides is C2, the fourth interior angle between the fourth and fifth sides is D2, and the fifth interior angle between the fifth side and the first side is E2; There are three grooves, the first interior angle of the pentagon of one groove, the second interior angle of the pentagon of one groove, and the fifth interior angle vertex of the pentagon of one groove coincide with each other, and A2+B2+E2=360°; or, the second interior angle of the pentagon of one groove and the fourth interior angle vertex of the pentagons of two grooves coincide with each other, and B2+2*D2=360°; or, the third interior angle of the pentagon of one groove and the fifth interior angle vertex of the pentagons of two grooves coincide with each other, and C2+2*E2=360°; Or, there are four grooves, the first interior angle of the pentagon of one groove, the third interior angle of the pentagon of two grooves, and the fifth interior angle vertex of the pentagon of one groove coincide, and A2+2*C2+E2=360°; or, the first interior angle of the pentagon of two grooves, the second interior angle of the pentagon of one groove, and the third interior angle vertex of the pentagon of one groove coincide, and 2*A2+B2+C2=360°; or, the first interior angle of the pentagon of one groove, the second interior angle of the pentagon of one groove, and the third interior angle vertex of the pentagon of one groove coincide, and 2*A2+B2+C2=360°; An interior angle and the fourth interior angle vertex of the three-grooved pentagon coincide with each other, and A2+3*D2=360°; or, the third interior angle of the two-grooved pentagon and the fourth interior angle vertex of the two-grooved pentagon coincide with each other, and 2*C2+2*D2=360°; or, the first interior angle of the two-grooved pentagon, the fourth interior angle of the one-grooved pentagon, and the fifth interior angle vertex of the one-grooved pentagon coincide with each other, and 2*A2+D2+E2=360°; Or, there are five grooves, the first interior angle of the pentagon of the three grooves, the third interior angle of the pentagon of the one groove, and the fourth interior angle of the pentagon of the one groove coincide with each other, and 3*A2+C2+D2=360°; or, the first interior angle of the pentagon of the two grooves and the third interior angle of the pentagon of the three grooves coincide with each other, and 2*A2+3*C2=360°; Alternatively, there are six grooves, the first interior angle vertices of the pentagons of the six grooves coincide, and 6*A2=360°.

8. The display panel according to claim 7, wherein: The angle of the first internal angle is 60°, the angle of the second internal angle is 160°, the angle of the third internal angle is 80°, the angle of the fourth internal angle is 100°, and the angle of the fifth internal angle is 140°.

9. The display panel according to claim 1, wherein: The display panel further includes a pixel defining layer, which is disposed on a side of the planarization layer away from the drive substrate; the pixel defining layer is provided with a plurality of through openings, and a light emitting device is disposed in one opening; One opening exposes a plurality of grooves, and the arrangement patterns of the grooves in different openings are different.

10. The display panel according to claim 1, wherein The display panel further includes a pixel defining layer, which is disposed on a side of the planarization layer away from the drive substrate; the pixel defining layer is provided with a plurality of through openings, and a light emitting device is disposed in one opening; Along a direction parallel to the driving substrate, different openings are arranged at different angles; There are at least two openings, one of which is rotated to have the same placement angle as the other opening.

11. The display panel according to claim 10, wherein: There are at least two openings, and after one of the openings is rotated at any angle between 0 and 30 degrees, the placement angle is the same as that of the other opening.

12. The display panel according to claim 1, wherein The surface slope angle of the groove gradually increases along the direction from the center of the groove to the boundary.

13. The display panel according to claim 1, wherein The planarization layer comprises a first surface away from the driving substrate, and the groove extends from the first surface into the planarization layer; The angle between the connecting line of the bottom center point of the groove and the boundary of the groove and the first surface is in the range of 0 to 80 degrees.

14. The display panel according to claim 1, wherein The light-emitting device includes a first electrode layer, a light-emitting layer, and a second electrode layer that are stacked. The first electrode layer, the light-emitting layer, and the second electrode layer are at least partially located in the multiple grooves, so that the surface of the light-emitting layer away from the driving substrate forms a concave morphology.

15. The display panel according to claim 1, wherein The display panel further includes an encapsulation layer, and the encapsulation layer is filled in the concave portion of the light emitting device.

16. A display device, characterized in that: include: The display panel according to any one of claims 1 to 15; A controller is electrically connected to the display panel.

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