A display panel and display device

Abstract

Embodiments of the present application disclose a display panel and a display device. The display panel comprises a driving substrate, a plurality of light emitting elements, a first pixel defining structure and a second pixel defining structure. The plurality of light emitting elements are located on one side of the driving substrate. The first pixel defining structure is located on one side of the driving substrate, and the first pixel defining structure comprises a pixel opening part and a pixel defining part. The light emitting elements are located in the pixel opening part, and the pixel defining part surrounds at least part of the light emitting elements. The second pixel defining structure surrounds at least part of the light emitting elements, and a undercut structure is arranged on one side of the second pixel defining structure facing the light emitting elements. In this way, the position and opening size of the light emitting elements are defined by the first pixel defining structure, so as to achieve a better large-viewing-angle light emission effect, and the adjacent light emitting elements are blocked by the second pixel defining structure, so as to reduce the horizontal leakage.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] With the continuous development of science and technology, more and more display products are being widely used in people's daily lives and work, bringing great convenience and becoming indispensable tools for people today. However, some display products suffer from serious overexposure issues, resulting in poor display quality. Therefore, solving this problem has become one of the pressing technical issues to be addressed. Summary of the Invention

[0003] This application provides a display panel and a display device. The position and opening of the light-emitting element are defined by a first pixel defining structure to achieve a better light emission effect with a wide viewing angle. The adjacent light-emitting elements are separated by a second pixel defining structure to reduce lateral leakage and improve the display effect.

[0004] In a first aspect, embodiments of this application provide a display panel, which includes a driving substrate; Multiple light-emitting elements are located on one side of the driving substrate; A first pixel defining structure is located on one side of the driving substrate. The first pixel defining structure includes a pixel opening portion and a pixel defining portion. The light-emitting element is located within the pixel opening portion, and the pixel defining portion surrounds at least a portion of the light-emitting element. A second pixel defining structure surrounds at least a portion of the light-emitting element, and the second pixel defining structure has an undercut structure on the side facing the light-emitting element.

[0005] Secondly, embodiments of this application also provide a display device, including any of the display panels described in the first aspect.

[0006] The display panel provided in this application includes a first pixel defining structure and a second pixel defining structure located on one side of a driving substrate. The first pixel defining structure includes a pixel opening portion and a pixel defining portion. The light-emitting element is located within the pixel opening portion, and the pixel defining portion surrounds at least a portion of the light-emitting element. The first pixel defining structure defines the position and opening size of the light-emitting element, ensuring a better light emission effect over a wide viewing angle. The second pixel defining structure surrounds at least a portion of the light-emitting element, and an undercut structure is provided on the side of the second pixel defining structure facing the light-emitting element. The undercut structure separates adjacent light-emitting elements, thereby reducing lateral leakage between adjacent light-emitting elements and improving the display effect of the display panel. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, although the drawings described below are some specific embodiments of this application, those skilled in the art can extend and extend to other structures and drawings based on the basic concepts of the device structure, driving method and manufacturing method disclosed and indicated by the various embodiments of this application. Undoubtedly, these should all be within the scope of the claims of this application.

[0008] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of a cross-section along the A-A' direction; Figure 3 yes Figure 2 A partially enlarged schematic diagram; Figure 4 yes Figure 1 A schematic diagram of a cross-section along the B-B' direction; Figure 5 yes Figure 1 A schematic diagram of a cross-section along the C-C' direction; Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of this application; Figure 7 yes Figure 6 A schematic diagram of a cross-section along the D-D' direction; Figure 8 This application provides a schematic diagram of another display panel structure; Figure 9 yes Figure 8 A schematic diagram of a cross-section along the E-E' direction; Figure 10 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application; Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be fully described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Various modifications and variations can be made in this application without departing from the spirit or scope of this application, which is obvious to those skilled in the art. Therefore, this application is intended to cover modifications and variations of this application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents.

[0010] Furthermore, the terms "first," "second," and similar words used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "an," "one," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "including" or "comprising" mean that the element or object preceding the word encompasses the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. In addition, descriptions of "same" or "equal" involved in the embodiments of this disclosure do not mean that two objects are completely equal in size or shape; they are allowed to be approximately the same or approximately equal within a certain error range. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0011] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. Figure 2 yes Figure 1 A schematic diagram of a cross-section along the A-A' direction. See also... Figure 1 and Figure 2 The display panel includes a driving substrate 10, a first pixel defining structure 20, a second pixel defining structure 30, and a plurality of light-emitting elements 40. The plurality of light-emitting elements 40 are located on one side of the driving substrate 10. The first pixel defining structure 30 is located on one side of the driving substrate 10 and includes a pixel opening portion 210 and a pixel defining portion 220. The light-emitting elements 40 are located within the pixel opening portion 210, and the pixel defining portion 320 surrounds at least a portion of the light-emitting elements 40. The second pixel defining structure 30 surrounds at least a portion of the light-emitting elements 40, and an undercut structure 310 is provided on the side of the second pixel defining structure 30 facing the light-emitting elements 40.

[0012] For example, such as Figure 1 and Figure 2 In the illustrated embodiment, the display panel includes a display area AA and a non-display area BB. The display area AA includes a plurality of sub-pixels 01 arranged in an array. Each sub-pixel 01 includes a light-emitting element 40 and a pixel driving circuit 02. The pixel driving circuit 02 can be disposed within the driving substrate 10. The plurality of light-emitting elements 40 can be disposed on one side of the driving substrate 10. The pixel driving circuit 02 is electrically connected to the light-emitting elements 40. The pixel driving circuit 02 provides driving signals to the light-emitting elements 40 to realize the display of the image in the display area AA. In addition, a first pixel defining structure 20 and a second pixel defining structure 30 are also disposed on one side of the driving substrate 10. The first pixel defining structure 20 and the second pixel defining structure 30 can be disposed on the same layer or on different layers. This application does not impose any limitations here, and those skilled in the art can set them as needed.

[0013] like Figure 2 In the embodiment shown, taking the first pixel defining structure 20 and the second pixel defining structure 30 located in the same film layer as an example, the first pixel defining structure 20 includes a pixel opening portion 210 and a pixel defining portion 220. The pixel aperture portion 210 penetrates the first pixel defining structure 20. The light-emitting element 40 is disposed within the pixel aperture portion 210. The light-emitting element 40 may include a first electrode layer 410 (anode layer) and a light-emitting layer 420. The display panel also includes a second electrode layer 430 (cathode layer). Along the thickness direction of the display panel, the pixel aperture portion 210 and the first electrode layer 410 at least partially overlap, so that the pixel aperture portion 210 exposes at least a portion of the first electrode layer 410. Thus, the first electrode layer 410 can contact the light-emitting layer 420 located within the pixel aperture portion 210. When no voltage is applied to the first electrode layer 410 and the second electrode layer 430, the light-emitting element 40 does not emit light. When a voltage is applied to the first electrode layer 410 and the second electrode layer 430, the first electrode layer 410 injects holes into the light-emitting layer 420, and the second electrode layer 430 injects electrons into the light-emitting layer 420. Holes and electrons recombine in the light-emitting layer 420 to form photoexcitons, which radiate light. The pixel limiting portion 220 is set around the pixel opening portion 210, and by setting the pixel limiting portion 220 to have a small slope on the side facing the pixel opening portion 210, it can be ensured that the light-emitting layer 420 can smoothly climb the slope on the pixel opening portion 210, and the small slope is conducive to achieving a large angle of light emission of the light-emitting element 20.

[0014] Furthermore, the second pixel defining structure 30 is disposed between adjacent light-emitting elements 40 and surrounds at least a portion of the light-emitting elements 40. The second pixel defining structure 30 has an undercut structure 310 on the side facing the light-emitting element 40. The undercut structure 310 can be understood as the edge of the upper structure being horizontally recessed inwards, causing the portion directly below it to be suspended, forming a shape similar to an "eaves". Since the light-emitting layer 420 in the light-emitting element 40 is fabricated as a single layer, the second pixel defining structure 30 can break the light-emitting layer 320 at the undercut structure 310 position, thereby isolating the lateral leakage between adjacent light-emitting elements 40 and improving the phenomenon of light leakage between adjacent light-emitting elements 40.

[0015] It should be noted that the first pixel defining structure 20 and the second pixel defining structure 30 can be formed using the same material or different materials. This application does not limit this, and those skilled in the art can set it as needed.

[0016] In summary, the embodiments of this application provide that one side of the driving substrate includes a first pixel defining structure and a second pixel defining structure. The first pixel defining structure includes a pixel opening portion and a pixel defining portion. The light-emitting element is disposed within the pixel opening portion. The pixel opening portion defines the position and opening size of the light-emitting element. By providing a small slope in the pixel defining portion, it is ensured that the light-emitting layer can smoothly climb the slope on the pixel opening portion, and the small slope is beneficial for achieving a wide viewing angle for the light-emitting element. In addition, the second pixel defining structure is located between adjacent light-emitting elements and surrounds at least a portion of the light-emitting elements. The undercut structure of the second pixel defining structure separates two adjacent light-emitting elements to improve the phenomenon of light leakage in the display panel.

[0017] Optionally, based on the above embodiments, see also... Figure 2 The first pixel limiting structure 20 and the second pixel limiting structure 30 are disposed on the same layer, and the second pixel limiting structure 30 is located on the side of the pixel limiting portion 220 away from the pixel opening portion 210.

[0018] For example, such as Figure 1 and Figure 2 In the illustrated embodiment, the first pixel defining structure 20 and the second pixel defining structure 30 are disposed on the same layer. The pixel defining portion 220 is disposed around the light-emitting element 40, and the second pixel defining structure 30 surrounds a portion of the pixel defining portion 220. In the interval region between the second pixel defining structure 30 and the pixel defining portion 220, the light-emitting layer 420 and the second electrode layer 430 are both disconnected in the interval region by the undercut structure 310 to block the lateral leakage between adjacent light-emitting elements 40 and improve the phenomenon of light leakage in the display panel. It can be understood that, see Figure 1The undercut structure 310 surrounds a portion of the light-emitting element 40, so that at least a portion of the light-emitting element 40 is not provided with the undercut structure 310, thereby ensuring that the second electrode layer 430 on different light-emitting elements 40 is electrically connected to the second electrode layer 430 on the second pixel defining structure 30, which helps to reduce voltage drop.

[0019] Based on the above embodiments, Figure 3 yes Figure 2 A partially enlarged schematic diagram, see [link / reference]. Figure 2 and Figure 3 The second pixel defining structure 30 includes a first surface S1, a second surface S2, and a first side surface S3. The first surface S1 is located on the side of the second surface S2 away from the driving substrate 10. The first side surface S3 connects the first surface S1 and the second surface S2 to form an undercut structure 310. The pixel defining portion 220 includes a third surface S4, a fourth surface S5, and a second side surface S6. The third surface S4 is located on the side of the fourth surface S5 away from the driving substrate 10. The second side surface S6 connects the third surface S4 and the fourth surface S5. Along the thickness direction of the driving substrate 10, the first surface S1 covers the second surface S2, and the fourth surface S5 covers the third surface S4.

[0020] For example, such as Figure 3In the illustrated embodiment, the second pixel defining structure 30 includes a first surface S1, a second surface S2, and a first side surface S3. The first surface S1 is the upper surface of the second pixel defining structure 30, the second surface S2 is the lower surface of the second pixel defining structure 30, and the first side surface S3 connects the upper and lower surfaces of the second pixel defining structure 30. In this embodiment, the first surface S1 covers the second surface S2, meaning the cross-section of the second pixel defining structure 30 can be an inverted trapezoid. The "eaves" shape formed by the first surface S1, the second surface S2, and the first side surface S3 is an undercut structure 310. Since the coverage distance of the first surface S1 is greater than that of the second surface S2, when the light-emitting layer 420 and the second electrode layer 430 of the light-emitting element 40 are covered at the position of the undercut structure 310, the undercut structure of the "eaves" shape will cause the light-emitting layer 420 and the second electrode layer 430 to be disconnected at the interval between the second pixel defining structure 30 and the pixel defining portion 220, thereby reducing the lateral leakage between adjacent light-emitting elements 40. The pixel defining portion 220 includes a third surface S4, a fourth surface S5, and a second side surface S6. The third surface S4 is the upper surface of the pixel defining portion 220, the fourth surface S5 is the lower surface of the pixel defining portion 220, and the second side surface S6 connects the third surface S4 and the fourth surface S5. In this embodiment, the fourth surface S5 is set to cover the third surface S4, that is, the cross-section of the pixel defining portion 220 can be a "trapezoidal shape". Since the coverage distance of the lower surface is greater than the coverage distance of the upper surface, the pixel defining portion 220 will form a slope on the side facing the light-emitting element 20. By setting the slope to have a small slope, it can be ensured that the light-emitting layer 420 and the second electrode layer 430 can smoothly climb the slope from the bottom of the pixel opening portion 210, and the small slope is conducive to achieving a large viewing angle light emission.

[0021] It should be noted that the above embodiments are only exemplified by taking the pixel limiting portion 220 as a regular trapezoid and the second pixel limiting structure 30 as an inverted trapezoid, but are not limited thereto. In other embodiments, the pixel limiting portion 220 and the second pixel limiting structure 30 can also be other shapes, and those skilled in the art can set them as needed.

[0022] Optionally, based on the above embodiments, see also... Figure 3 The vertical projection of the first side S3 on the driving substrate 10 is offset from the vertical projection of the second side S6 on the driving substrate 10.

[0023] Specifically, such as Figure 2 and Figure 3As shown, the second pixel limiting structure 30 is located on the side of the pixel limiting portion 220 away from the pixel opening portion 210, and the first side surface S3 of the second pixel limiting structure 30 is disposed opposite to the second side surface S6 of the pixel limiting portion 220. Since the light-emitting element 40 needs to be disconnected at the position of the undercut structure 310, if the distance between the first side S3 and the second side S6 is too close, the light-emitting layer 420 and the second electrode layer 430 of the light-emitting element 40 may not be completely disconnected at the position of the undercut structure 310. Therefore, in this embodiment, the vertical projection of the first side S3 on the driving substrate 10 and the vertical projection of the second side S6 on the driving substrate 10 are staggered. That is, the edge position of the first side S3 near the pixel limiting portion 220 and the edge position of the second side S6 near the second pixel limiting structure 30 are a certain distance apart, so that the distance between the first side S3 and the second side S6 is greater, so that the light-emitting layer 420 and the second electrode layer 430 of the light-emitting element 40 have enough space to be completely disconnected at the position of the undercut structure 310, thus ensuring the isolation effect of the undercut structure 310.

[0024] In yet another embodiment, see also... Figure 3 The first side surface S3 includes a first edge L1 near the pixel-defining portion 220, and the second side surface S6 includes a second edge L2 near the second pixel-defining structure 30. The first distance between the first edge L1 and the second edge L2 is D1, which satisfies: D1≥1μm.

[0025] Specifically, such as Figure 2 and Figure 3 As shown, the first side surface S3 of the second pixel defining structure 30 and the second side surface S6 of the pixel defining portion 220 are disposed opposite each other. Since the second pixel defining structure 30 is an inverted trapezoid, i.e., the first surface S1 covers the second surface S2, the first edge L1 of the first side surface S3 near the pixel defining portion 220 is the boundary edge between the first side surface S3 and the first surface S1, i.e., the first edge L1 is the position in the second pixel defining structure 30 closest to the pixel defining portion 220. Since the pixel defining portion 220 is a regular trapezoid, i.e., the fourth surface S5 covers the third surface S4, the second edge L2 of the second side surface S6 near the second pixel defining structure 30 is the boundary edge between the second side surface S6 and the fourth surface S5, i.e., the second edge L2 is the position in the pixel defining portion 220 closest to the second pixel defining structure 30. By setting the first distance D1 between the first edge L1 and the second edge L2 to satisfy: D1≥1μm, the distance between the first side surface S3 and the second side surface S6 is relatively large, so that the light-emitting layer 420 of the light-emitting element 40 and the second electrode layer 430 have enough space to be completely separated at the position of the undercut structure 310, thus ensuring the isolation effect of the undercut structure 310.

[0026] In yet another embodiment, see also... Figure 3 The first angle α between the first surface S1 and the first side surface S3 is greater than the second angle β between the fourth surface S5 and the second side surface S6.

[0027] Specifically, when the first surface S1 and the third surface S4 are at the same height, the first included angle α reflects the coverage distance of the first side surface S3, and the second included angle β reflects the coverage distance of the second side surface S6. The larger the first included angle α, the smaller the coverage distance of the first side surface S3; the smaller the first included angle α, the larger the coverage distance of the first side surface S3. Similarly, the larger the second included angle β, the smaller the coverage distance of the second side surface S6; the smaller the second included angle β, the larger the coverage distance of the second side surface S6. Furthermore, by setting the angle of the first included angle α to be greater than the angle of the second included angle β, i.e., the angle of the first included angle α is larger and the angle of the second included angle β is smaller, the coverage distance of the first side S3 is smaller and the coverage distance of the second side S6 is larger. When the positions of the second surface S2 and the fourth surface S5 are fixed, the distance between the first edge L1 of the second pixel limiting structure 30 and the second side S6 is larger. This ensures that the light-emitting layer 420 and the second electrode layer 430 of the light-emitting element 40 have enough space to be completely separated at the position of the undercut structure 310, thus ensuring the isolation effect of the undercut structure 310.

[0028] Optionally, based on the above embodiments, Figure 4 yes Figure 1 A schematic diagram of a cross-section along the B-B' direction. See also... Figure 1 and Figure 4 The light-emitting element 40 includes a light-emitting layer 420 and a first electrode layer 410, with the first electrode layer 410 located on the side of the light-emitting layer 420 closest to the driving substrate 10. The first electrode layer 410 includes a first portion 410A and a second portion 410B, with the first portion 410A in contact with the light-emitting layer 420. The first side surface S3 includes a first edge L1 near the pixel defining portion 220, and the first portion 410A includes a third edge L3 closest to the second portion 410B. The second distance between the first edge L1 and the third edge L3 is D2, which satisfies D2≥5μm.

[0029] For example, such as Figure 4In the embodiment shown, the second light-emitting layer 420 is disposed within the pixel opening portion 210, and the first electrode layer 410 is located on the side of the light-emitting layer 420 close to the driving substrate 10. The first electrode layer 410 and the pixel opening portion 210 at least partially overlap to ensure that the first electrode layer 410 can contact the light-emitting layer 420. Furthermore, the first electrode layer 410 includes a first portion 410A that contacts the light-emitting layer 420 and a second portion 410B that does not contact the light-emitting layer 420. The first portion 410A includes a third edge L3 that is closest to the second portion 410B. The third edge L3 can be understood as the bottom boundary of the pixel opening portion 210. The first side surface S3 of the second pixel limiting structure 30 includes a first edge L1. By setting a second distance D2 between the first edge L1 and the third edge L3 to satisfy: D2≥5μm, that is, the distance between the edge of the second pixel limiting structure 30 and the bottom boundary of the pixel opening portion 210 is greater than 5μm, a larger distance is left for the pixel limiting portion 220 so that the pixel limiting portion 220 can achieve a smaller slope and ensure the large viewing angle light emission effect of the light-emitting element 40.

[0030] It is understandable that, such as Figure 4 In the illustrated embodiment, the second pixel defining structure 30 is disposed around the light-emitting element 40. The angle of the undercut structure 310 is small in a portion of the area corresponding to the light-emitting element 40, so that the light-emitting element 40 is not completely disconnected by the undercut structure 310 in a portion of the pixel defining portion 220. This ensures that the second electrode layer 430 on the pixel defining portion 220 and the second electrode layer 430 on the second pixel defining structure 30 remain electrically connected in a portion of the area surrounding the light-emitting element 40. It should be noted that... Figure 4 The example described uses the second distance D2 at the position where the light-emitting element 40 is not completely disconnected as an example, but it is not a limitation. The second distance D2 at the position where the light-emitting element 40 is completely disconnected has the same limitations and corresponding beneficial effects, which will not be described in detail here.

[0031] It should also be noted that, in another embodiment, the undercut structure 310 may only surround a portion of the light-emitting element 40, that is, the undercut structure 310 is not provided in a portion of the light-emitting element 40, thereby ensuring that the second electrode layer 430 on the pixel-defining portion 220 and the second electrode layer 430 on the second pixel-defining structure 30 are electrically connected in a portion of the area around the light-emitting element 40, which is beneficial to reducing voltage drop.

[0032] Optionally, based on the above embodiments, see also... Figure 2The pixel-defining portion 220 is made of the same material as the second pixel-defining structure 30, and both are light-shielding materials. Specifically, in this embodiment, both the pixel-defining portion 220 and the second pixel-defining structure 30 are made of black light-shielding material. This allows the pixel-defining portion 220 and the second pixel-defining structure 30 to absorb light reflection from the metal lines within the display panel, thereby contributing to a low reflectivity of the display panel. It should be noted that when both the pixel-defining portion 220 and the second pixel-defining structure 30 are made of black light-shielding material, this embodiment can use a developing and baking process to prepare the first pixel-defining structure 20 and the second pixel-defining structure 30 respectively. This avoids the fading that occurs when the first pixel-defining structure 20 and the second pixel-defining structure 30 are prepared using a developing and resist-removing process in the prior art, further ensuring a low reflectivity of the display panel.

[0033] Optionally, in yet another embodiment, Figure 5 yes Figure 1 A schematic diagram of a cross-section along the C-C' direction, see [reference]. Figure 1 and Figure 5 The second pixel defining structure 30 is located on the side of the pixel defining portion 220 away from the driving substrate 10, and the second pixel defining structure 30 is located near the pixel opening portion 210.

[0034] Specifically, such as Figure 5 In the illustrated embodiment, the first pixel defining structure 20 and the second pixel defining structure 30 are disposed in different layers, with the second pixel defining structure 30 located on the side of the first pixel defining structure 20 away from the driving substrate 10. Along the thickness direction of the display panel, the second pixel defining structure 30 and the pixel defining portion 220 at least partially overlap. Therefore, during the fabrication of the light-emitting layer 420 and the second electrode layer 430 of the light-emitting element 40, the height difference between the second pixel defining structure 30 and the pixel defining portion 220 at least breaks the light-emitting layer 420 at the position of the second pixel defining structure 30, thereby reducing lateral leakage between adjacent light-emitting elements 40 and improving the display panel's light-stealing phenomenon. Furthermore, an undercut structure 310 can be provided on the side of the second pixel defining structure 30 near the light-emitting element 40 to further ensure that the light-emitting layer 420 and the second electrode layer 430 are broken at the position of the second pixel defining structure 30.

[0035] Optionally, based on the above embodiments, see also... Figure 5The material of the second pixel defining structure 30 includes a transparent material, and the material of the pixel defining portion 220 includes a light-shielding material. Specifically, the second pixel defining structure 30 and the first pixel defining structure 20 can be made of different materials. For example, the first pixel defining structure 20 can be made of a black light-shielding material. The first pixel defining structure 20 absorbs the reflection of light by the metal lines in the display panel, thereby helping to achieve a low reflectivity of the display panel. Since the second pixel defining structure 30 is located on the side of the first pixel defining structure 20 away from the driving substrate 10, the second pixel defining structure 30 can be made of a transparent material. It is understood that the embodiments of this application are only used as an example of the second pixel defining structure 30 being made of a transparent material, but this is not a limitation. In other embodiments, the second pixel defining structure 30 can also be made of a black light-shielding material, and those skilled in the art can set it as needed.

[0036] Optionally, in yet another embodiment, Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of this application. Figure 7 yes Figure 6 A schematic diagram of a cross-section along the D-D' direction, see [reference needed]. Figure 6 The display panel also includes a non-transparent area AA1 and multiple transparent areas AA2, the light transmittance of the transparent area AA2 is greater than that of the non-transparent area AA1, and the second pixel defining structure 30 surrounds at least part of the transparent area AA2.

[0037] For example, such as Figure 6 In the illustrated embodiment, the display area AA of the display panel also includes multiple light-transmitting areas AA2 and non-light-transmitting areas AA1. The non-light-transmitting areas AA1 contain multiple sub-pixels 01 and various signal lines, while the light-transmitting areas AA2 do not contain sub-pixels 01 or various signal lines. Therefore, the transmittance of the light-transmitting areas AA2 is much greater than that of the non-light-transmitting areas AA1, thereby improving the transmittance of the display panel. Based on this, a second pixel-defining structure 30 can be set to surround the entire light-transmitting area AA2, thereby cutting off the entire light-emitting layer 420 and the second electrode layer 430 at the edge of the light-transmitting area AA2. Furthermore, since the second pixel-defining structure 30 is a black light-shielding material, by surrounding the entire light-transmitting area AA2 with the second pixel-defining structure 30 made of black light-shielding material, the light transmission requirements of the light-transmitting area AA2 can be maintained, while the remaining areas are all shielded by the black light-shielding material of the second pixel-defining structure 30, thereby reducing the reflectivity within the display panel.

[0038] Optionally, in yet another embodiment, Figure 8 This application provides a schematic diagram of another display panel structure. Figure 9 yes Figure 8 A schematic diagram of a cross-section along the E-E' direction. See also... Figure 8 and Figure 9The second pixel defining structure 30 surrounds a portion of the light-transmitting area AA2. The pixel defining portion 220 includes a first defining portion 221. The light-transmitting area AA2 has a connecting area AA3 on the side facing the light-emitting element 40. The first defining portion 221 includes a first sub-portion 221A extending to the connecting area AA3 and a second sub-portion 221B surrounding the light-emitting element 40.

[0039] Specifically, such as Figure 8 and Figure 9 As shown, in another embodiment, the second pixel defining structure 30 may also surround a portion of the light-transmitting area AA2, and a connecting area AA3 is provided at the position of the light-transmitting area AA2 closest to the light-emitting element 40. The pixel defining portion 220 may be made of black light-blocking material, and the pixel defining portion 220 may extend to the connecting area AA3. That is, the pixel defining portion 220 may include a second sub-portion 221B surrounding the light-emitting element 40 and a first sub-portion 221A extending to the connecting area AA3. Thus, while retaining the light transmission requirement of the light-transmitting area AA3, the remaining areas are all blocked by the second pixel defining structure 30 and the pixel defining portion 220 made of black light-blocking material, thereby reducing the reflectivity in the display panel.

[0040] Optionally, in yet another embodiment, see also [link to previous document]. Figure 8 and Figure 9 The light-emitting element 40 includes a first color light-emitting element 401, and the light-transmitting area AA2 is connected to the nearest first color light-emitting element 401 through the connecting area AA3.

[0041] Specifically, the multiple light-emitting elements 40 may include red light-emitting elements, green light-emitting elements, and blue light-emitting elements. These elements can be arranged according to a preset rule. For example... Figure 8 In the illustrated embodiment, the first color light-emitting element 401 can be a red light-emitting element. The light-transmitting areas AA2 located on both sides of the red light-emitting element are connected to the nearest red light-emitting element through a connecting area AA3, and extend into the connecting area AA3 through the pixel-limiting portion 220 corresponding to the first color light-emitting element 401. This increases the transmittance of the display panel while reducing its reflectivity. It is understood that... Figure 8 The example described is based solely on the premise that the light-transmitting area AA2 is connected to the nearest first color light-emitting element 401, but this is not a limitation. In other embodiments, the light-transmitting area AA2 may also be connected to the nearest green light-emitting element or the nearest blue light-emitting element. Those skilled in the art can set it as needed.

[0042] Optionally, in yet another embodiment, Figure 10 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application. See also... Figure 10 The light-transmitting area AA2 is connected to the light-emitting elements 40 of different colors through the connecting area AA3, and the light-transmitting area AA2 is connected to the light-emitting element 40 that is closest to it.

[0043] Specifically, such as Figure 10 In the illustrated embodiment, the plurality of light-emitting elements 40 may include red light-emitting elements, green light-emitting elements, and blue light-emitting elements. The red, green, and blue light-emitting elements can be arranged according to a preset rule. For example... Figure 10 In the embodiment shown, different light-transmitting areas AA2 are connected to different light-emitting elements 40, and are connected to the nearest light-emitting element 40 through the connecting area AA3, and extend into the connecting area AA3 through the corresponding pixel limiting portion 220, thereby increasing the transmittance of the display panel and reducing the reflectivity of the display panel.

[0044] Optionally, based on the above embodiments, see also... Figure 9 The display panel also includes a light-shielding layer 50, which is located on the side of the first pixel limiting structure 20 near the driving substrate 10. Along the thickness direction of the driving substrate 10, the light-shielding layer 50 is offset from the light-transmitting area AA3.

[0045] For example, such as Figure 9 In the illustrated embodiment, to prevent the risk of light reflection from metal lines at locations where the pixel limiting portion 220 and the second pixel limiting structure 30 are not provided, this embodiment provides a light-shielding layer 50 on the side of the first pixel limiting structure 20 closest to the driving substrate 10. The light-shielding layer 50 provides full-area shielding, further reducing the reflectivity within the display panel. Furthermore, along the thickness direction of the driving substrate 10, the light-shielding layer 50 is staggered from the light-transmitting area AA3, thereby preventing the light-shielding layer 50 from affecting the transmittance requirements of the display panel.

[0046] Optionally, based on the above embodiments, see also... Figure 3 The second pixel defining structure 30 includes a first surface S1, a second surface S2 and a first side surface S3. The first surface S1 is located on the side of the second surface S2 away from the driving substrate 10. The first included angle between the first surface S1 and the first side surface S3 is α, which satisfies: 45°≤α≤70°.

[0047] Specifically, when the height of the first surface S1 is constant, the first included angle α reflects the cutting capability of the undercut structure 310. The larger the angle α, the smaller the coverage distance of the first side surface S3, and the worse the cutting capability of the undercut structure 310. Conversely, the smaller the angle α, the larger the coverage distance of the first side surface S3, and the stronger the cutting capability of the undercut structure 310. Furthermore, by setting the first included angle α to satisfy 45°≤α≤70°, the undercut structure 310 is guaranteed to have a strong cutting capability, ensuring that the light-emitting layer 420 of the light-emitting element 20 can be disconnected at the undercut structure 310, further improving the phenomenon of light leakage in the display panel.

[0048] Optional, see below Figure 3 The pixel-defining portion 220 includes a third surface S4, a fourth surface S5, and a second side surface S6. The third surface S4 is located on the side of the fourth surface S5 away from the driving substrate 10, and the second side surface S6 connects the third surface S4 and the fourth surface S5. The second included angle between the fourth surface S5 and the second side surface S6 is β, and the second included angle β satisfies: β≤45°.

[0049] Specifically, the second included angle β between the fourth surface S5 and the second side surface S6 can reflect the slope of the pixel limiting portion 220. The larger the angle β, the larger the slope of the pixel limiting portion 220; the smaller the angle β, the smaller the slope of the pixel limiting portion 220. By setting the second included angle β to satisfy β≤45° so that the pixel limiting portion 220 has a smaller slope, it can be ensured that the light-emitting layer 420 can smoothly climb the slope on the pixel opening portion 210. Moreover, a smaller slope is conducive to achieving a large viewing angle of light emission from the light-emitting element 20.

[0050] Based on the same inventive concept, this application also provides a display device. Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 11 As shown, the display device includes the display panel 100 in the above embodiments. This display device includes the display panel 100 of any embodiment of this application; therefore, the display device provided in this application embodiment possesses the corresponding beneficial effects of the display panel 100 provided in this application embodiment, which will not be elaborated further here. For example, the display device can be an electronic device such as a mobile phone, computer, smart wearable device (e.g., smartwatch), and in-vehicle display device; this application embodiment does not limit this.

[0051] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, include: Drive substrate; Multiple light-emitting elements are located on one side of the driving substrate; A first pixel defining structure is located on one side of the driving substrate. The first pixel defining structure includes a pixel opening portion and a pixel defining portion. The light-emitting element is located within the pixel opening portion, and the pixel defining portion surrounds at least a portion of the light-emitting element. A second pixel defining structure surrounds at least a portion of the light-emitting element, and the second pixel defining structure has an undercut structure on the side facing the light-emitting element.

2. The display panel according to claim 1, characterized in that, The first pixel defining structure and the second pixel defining structure are disposed on the same layer, and the second pixel defining structure is located on the side of the pixel defining portion away from the pixel opening portion.

3. The display panel according to claim 2, characterized in that, The second pixel defining structure includes a first surface, a second surface, and a first side surface, wherein the first surface is located on the side of the second surface away from the driving substrate, and the first side surface connects the first surface and the second surface to form the undercut structure; The pixel-defined portion includes a third surface, a fourth surface, and a second side surface. The third surface is located on the side of the fourth surface away from the driving substrate, and the second side surface connects the third surface and the fourth surface. Along the thickness direction of the driving substrate, the first surface covers the second surface, and the fourth surface covers the third surface.

4. The display panel according to claim 3, characterized in that, The vertical projection of the first side surface onto the driving substrate is offset from the vertical projection of the second side surface onto the driving substrate.

5. The display panel according to claim 3, characterized in that, The first side includes a first edge near the pixel-defined portion; The second side includes a second edge adjacent to the second pixel-defined structure; The first distance between the first edge and the second edge is D1, and the first distance satisfies: D1≥1μm.

6. The display panel according to claim 3, characterized in that, The first angle between the first surface and the first side surface is greater than the second angle between the fourth surface and the second side surface.

7. The display panel according to claim 3, characterized in that, The light-emitting element includes a light-emitting layer and a first electrode layer, wherein the first electrode layer is located on the side of the light-emitting layer closer to the driving substrate; The first electrode layer includes a first portion and a second portion, wherein the first portion is in contact with the light-emitting layer; The first side includes a first edge close to the pixel-defined portion, the first portion includes a third edge closest to the second portion, and a second distance D2 between the first edge and the third edge satisfies D2≥5μm.

8. The display panel according to claim 2, characterized in that, The material of the pixel-defined portion is the same as the material of the second pixel-defined structure, and both are light-shielding materials.

9. The display panel according to claim 1, characterized in that, The second pixel defining structure is located on the side of the pixel defining portion away from the driving substrate, and the second pixel defining structure is located near the pixel opening portion.

10. The display panel according to claim 9, characterized in that, The material of the second pixel-defining structure includes a transparent material, and the material of the pixel-defining structure includes a light-shielding material.

11. The display panel according to claim 1, characterized in that, The display panel also includes a non-transparent area and multiple transparent areas, wherein the light transmittance of the transparent areas is greater than that of the non-transparent areas; The second pixel-defined structure surrounds at least a portion of the light-transmitting area.

12. The display panel according to claim 11, characterized in that, The second pixel-defined structure surrounds a portion of the light-transmitting area; The pixel-defined portion includes a first-defined portion; The light-transmitting area has a connecting area on the side facing the light-emitting element, and the first defined portion includes a first sub-portion extending into the connecting area and a second sub-portion surrounding the light-emitting element.

13. The display panel according to claim 12, characterized in that, The light-emitting element includes a first color light-emitting element, and the light-transmitting area is connected to the nearest first color light-emitting element through the connecting area.

14. The display panel according to claim 12, characterized in that, The light-transmitting area is connected to different light-emitting elements through the connecting area, and the light-transmitting area is connected to the light-emitting element that is closest to it.

15. The display panel according to claim 11, characterized in that, The display panel further includes a light-shielding layer, which is located on the side of the first pixel defining structure near the driving substrate; Along the thickness direction of the driving substrate, the light-shielding layer is offset from the light-transmitting area.

16. The display panel according to claim 1, characterized in that, The undercut structure surrounds a portion of the light-emitting element.

17. The display panel according to claim 1, characterized in that, The second pixel defining structure includes a first surface, a second surface, and a first side surface, wherein the first surface is located on the side of the second surface away from the driving substrate; The first included angle between the first surface and the first side is α, and the first included angle α satisfies: 45°≤α≤70°.

18. The display panel according to claim 1, characterized in that, The pixel-defined portion includes a third surface, a fourth surface, and a second side surface. The third surface is located on the side of the fourth surface away from the driving substrate, and the second side surface connects the third surface and the fourth surface. The second included angle between the fourth surface and the second side is β, and the second included angle β satisfies: β≤45°.

19. A display device, characterized in that, Includes the display panel as described in any one of claims 1-18.

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