Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate, a light-emitting unit and a shading structure, the light-emitting unit and the shading structure are arranged on one side of the substrate, and the shading structure at least partially surrounds the light-emitting unit; the display panel comprises a first area and a second area. The first area is located on the side, away from the edge of the display panel, of the second area. The thickness of the shading structure in the first area is smaller than that of the shading structure in the second area. Therefore, according to the display panel and the display device provided by the invention, the light emitting rate of the display panel can be improved.

Description

Technical Field

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

[0002] Micro LED (Micro Light Emitting Diode) displays integrate LED chips with a size of less than 100 micrometers as display pixels on a substrate. Micro LEDs have advantages such as high stability, long lifespan, low power consumption, and fast response speed.

[0003] In related technologies, the display panel may include an array substrate and multiple Micro LEDs located on the array substrate, all of which are electrically connected to the array substrate. The borderless splicing display panel's characteristic of having no border reduces the proportion of non-display areas, eliminating the visual discontinuity of traditional bezels. However, the light extraction efficiency of the aforementioned display panel needs improvement. Summary of the Invention

[0004] Therefore, it is necessary to provide a display panel and display device that aim to improve the light output efficiency of the display panel.

[0005] In a first aspect, embodiments of this application provide a display panel, the display panel including a substrate and a light-emitting unit and a light-shielding structure disposed on one side of the substrate, the light-shielding structure at least partially surrounding the light-emitting unit; the display panel includes a first region and a second region, the first region being located on the side of the second region away from the edge of the display panel; the thickness of the light-shielding structure located in the first region is less than the thickness of the light-shielding structure located in the second region.

[0006] Secondly, embodiments of this application also provide a display device, which includes the display panel provided in the first aspect.

[0007] The display panel provided in this application embodiment has a second region that can accommodate excess light-shielding structures, resulting in a larger thickness of the light-shielding structures in the second region. The second region increases the capacity of the edge region to accommodate the light-shielding structures, thereby alleviating the problem that the light-shielding structures located in the edge region converge and cause the light-shielding structures to climb to the side of the light-emitting unit away from the substrate, thereby improving the light extraction efficiency of the display panel. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the edge of the display panel along a first direction provided in an embodiment of this application.

[0009] Figure 2 Another cross-sectional view of the edge of the display panel along one side of the first direction provided in the embodiment of this application.

[0010] Figure 3 This is a partial cross-sectional view of the display panel provided in an embodiment of this application.

[0011] Figure 4 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0012] Figure 5a This is a top view of the display panel provided in an embodiment of this application.

[0013] Figure 5b This is a top view of the display panel provided in an embodiment of this application.

[0014] Figure 5c This is a top view of the display panel provided in an embodiment of this application.

[0015] Figure 5d This is a top view of the display panel provided in an embodiment of this application.

[0016] Figure 5e This is a top view of the display panel provided in an embodiment of this application.

[0017] Figure 6 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0018] Figure 7 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0019] Figure 8 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0020] Figure 9 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Display device; 100. Display panel; 110. Third planarization layer; 120. Second planarization layer; 130. First planarization layer; 131. First sub-planarization layer; 132. Second sub-planarization layer; 133. Storage recess; 1331. First sub-storage recess; 1332. Second sub-storage recess; 140. Substrate; 141. First surface; 142. Second surface; 151. First passivation layer; 152. Second passivation layer; 153. Insulating layer; 154. Light-shielding structure; 155. Side light-shielding structure; 56. Filler layer; 157. Connecting pad; 158. Side trace; 161. First encapsulation layer; 162. Second encapsulation layer; 163. Third encapsulation layer; 170. Light-emitting unit; 171. First electrode; 172. Second electrode; 173. Light-emitting functional part; 174. Gap; 180. Repellent element; 181. Through hole; 183. Repellent groove; 191. Semiconductor layer; 100a. First region; 100b. Second region; 100c. Third region; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more intermediate elements present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more intermediate elements present.

[0026] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0027] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0028] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0029] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0030] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0031] As described in the background section, the related technologies feature a frameless splicing display panel, which lacks the frame characteristic of traditional display panels. A connecting pad can be provided on the light-emitting side of the display panel, and a driver chip can be provided on the backlight side. Side traces are provided on the sidewalls of the display panel, and the connecting pad and driver chip are electrically connected through these side traces.

[0032] To reduce the visibility of seams after splicing, the display panel can be encapsulated using a thin encapsulation method, meaning the total thickness of the encapsulation layer on its surface is relatively thin, thus reducing the visibility of seams after splicing. This encapsulation can be achieved using black matrix (BM) ink and a transparent composite film. BM ink is formed using a printing process.

[0033] However, due to the limitations of the printing process used in BM packaging, BM ink near the edge of the display panel may converge, which in turn causes BM ink to climb onto the LED light-emitting surface of the two rows of pixels near the edge of the display panel or the second row of pixels near the edge, resulting in a decrease in the light output of these pixels.

[0034] Based on the above-mentioned technical problems, this application provides a display panel and display device. By providing a storage recess in the first planarization layer and setting part of the light-shielding structure in the storage recess, the problem of the light-shielding structure rising to the side of the light-emitting unit away from the substrate caused by the convergence of the light-shielding structure in the edge area can be alleviated, thereby improving the light output efficiency of the display panel.

[0035] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] The following combination Figures 1-9 The display panel and display device provided in the embodiments of this application will be described.

[0037] See Figure 1 This application provides a display panel 100, which includes a substrate 140 that can provide support for a subsequently formed film layer. The substrate 140 has a first surface 141 and a second surface 142 that are opposite each other along the thickness direction (direction Z) of the substrate 140, and a side surface A of the substrate 140 is connected between the first surface 141 and the second surface 142.

[0038] In some embodiments, see Figure 1 The display panel 100 includes a third planarization layer 110 and a second planarization layer 120. The third planarization layer 110 is located on the first surface 141, and the second planarization layer 120 is located on the side of the third planarization layer 110 facing away from the substrate 140. By providing the third planarization layer 110 and the second planarization layer 120, a relatively flat surface support can be provided for the light-emitting unit 170.

[0039] See Figure 1 The display panel 100 may include multiple light-emitting units 170, which are spaced apart on one side of the substrate 140. The multiple light-emitting units 170 being spaced apart can mean that there is a gap between adjacent light-emitting units 170. The multiple light-emitting units 170 may be located on the side of the second planarization layer 120 opposite to the substrate 140, and are arranged at intervals. The orthographic projection of each light-emitting unit 170 on the plane of the first surface 141 is located within the outer contour of the orthographic projection of either the third planarization layer 110 or the second planarization layer 120 on the plane of the first surface 141. Thus, the third planarization layer 110 and the second planarization layer 120 can provide a relatively flat surface support for each light-emitting unit 170.

[0040] For example, the light-emitting unit 170 may include a micro light-emitting diode.

[0041] In some embodiments, see Figure 1 The display panel 100 may include a first planarization layer 130, which is located on the side of the light-shielding structure 154 facing the substrate 140. For example, the first planarization layer 130 is located on the side of the second planarization layer 120 away from the substrate 140.

[0042] In some embodiments, see Figure 1 The display panel 100 may include a light-shielding structure 154, which and the light-emitting unit 170 are located on the same side of the substrate 140. For example, the light-shielding structure 154 is located on the side of the first planarization layer 130 facing away from the substrate 140, and the light-shielding structure 154 at least partially surrounds the light-emitting unit 170. The light-shielding structure 154 can help achieve a seamless black effect and also helps prevent color crossing between two adjacent light-emitting units 170.

[0043] See Figure 1 The display panel 100 includes a first region 100a and a second region 100b. The first region 100a is located on the side of the second region 100b away from the edge of the display panel 100. The thickness of the light-shielding structure 154 located in the first region 100a is less than the thickness of the light-shielding structure 154 located in the second region 100b. Thus, the second region 100b can accommodate excess light-shielding structures 154, resulting in a larger thickness of the light-shielding structures 154 in the second region 100b. This increases the capacity of the edge region to accommodate the light-shielding structures 154, making it less likely for uncured light-shielding structures 154 to rise to the side of the light-emitting unit 170 located in the edge region that faces away from the substrate 140. This reduces the possibility of convergence of the light-shielding structures 154 in the edge region, which is beneficial for improving the light extraction efficiency of the light-emitting unit 170 located at the edge of the substrate 140, thereby improving the light extraction efficiency of the display panel 100.

[0044] See Figure 1 The second region 100b of the display panel 100 is provided with a storage recess 133 for accommodating a light-shielding structure 154. Along the thickness direction of the substrate 140, the orthographic projection of the storage recess 133 onto the plane containing the first surface 141 overlaps with the orthographic projection of the light-emitting unit 170 located at the edge of the first surface 141 onto the plane containing the first surface 141. By placing the storage recess 133 at the edge of the first surface 141, the storage recess 133 can be used to store the subsequently formed light-shielding structure 154 located in the edge region. The second region 100b can be the region where the storage recess 133 is provided, and the second region 100b and the storage recess 133 can overlap.

[0045] It should be noted that the pattern of the fourth conductive layer M4 results in a lower flatness on the side of the fourth conductive layer M4 facing away from the substrate 140. By setting the first planarization layer 130, and the first planarization layer 130 covering part of the side of the fourth conductive layer M4 facing away from the substrate 140, the first planarization layer 130 provides a relatively flat surface for the light-shielding structure 154, which can reduce the adverse effect of the fourth conductive layer M4 on the overflow of the uncured light-shielding structure 154. The uncured light-shielding structure 154 is prone to overflow on a flat surface. A relatively flat surface is conducive to the more uniform distribution of the light-shielding structure 154 in the area of ​​the first planarization layer 130 where no storage recess is provided.

[0046] The surface of the light-emitting unit 170 facing away from the substrate 140 can be the light-emitting surface of the light-emitting unit 170. The process of forming the light-shielding structure 154 can be as follows: first, an initial light-shielding structure is formed. The initial light-shielding structure is liquid or semi-solid and has a certain degree of fluidity. Then, the initial light-shielding structure is cured to form the light-shielding structure 154. The initial light-shielding structure is the uncured light-shielding structure 154. When the light-shielding structure 154 is uncured, the light-shielding structure 154 located at the edge of the substrate 140 is prone to convergence problems. This results in a large height of the surface of the light-shielding structure 154 facing away from the substrate 140. The light-shielding structure 154 located at the edge of the substrate 140 can easily rise to the surface of the light-emitting unit 170 facing away from the substrate 140, causing a decrease in the light extraction efficiency of the light-emitting unit 170 located at the edge of the substrate 140, thereby affecting the light extraction efficiency of the display panel. For example, the light-shielding structure 154 can easily rise to the side of the 0.5-3 rows of light-emitting units 170 facing away from the substrate 140 near the edge of the substrate 140, for example, it can be 2 rows.

[0047] In some embodiments, see Figure 1 Part of the light-shielding structure 154 can be located in the storage recess 133. By setting the storage recess 133 in the first planarization layer 130, the storage recess 133 can be used to store the light-shielding structure 154 formed subsequently. The storage recess 133 increases the capacity of the edge region to accommodate the light-shielding structure 154, which can reduce the height of the surface of the light-shielding structure 154 in the storage recess 133 facing away from the substrate 140. This reduces the distance between the surface of the light-shielding structure 154 facing away from the substrate 140 and the substrate 140, thereby reducing the overflow of the uncured light-shielding structure 154 in the edge region. This makes it less likely for the uncured light-shielding structure 154 to climb to the surface of the light-emitting unit 170 facing away from the substrate 140 in the edge region, reducing the possibility of the light-shielding structure 154 converging in the edge region. This is beneficial to improving the light extraction efficiency of the light-emitting unit 170 located at the edge of the substrate 140, thereby improving the light extraction efficiency of the display panel 100.

[0048] In some embodiments, the surface of the light-shielding structure 154 facing away from the substrate 140 is perpendicular to the substrate 140 along the thickness direction of the substrate 140 (i.e., Figure 1 The distance in the direction Z is the first distance D1, and the distance between the surface of the light-emitting unit 170 facing away from the substrate 140 and the substrate 140 along the thickness direction of the substrate 140 is the second distance D2. The first distance D1 is less than the second distance D2. With the first distance D1 being less than the second distance D2, the light-shielding structure 154 is lower than the light-emitting unit 170. This reduces the probability of the uncured light-shielding structure 154 contacting the surface of the light-emitting unit 170 facing away from the substrate 140. This can alleviate the phenomenon of the light-shielding structure 154 climbing to the surface of the light-emitting unit 170 facing away from the substrate 140, thereby reducing the obstruction of the light emitted by the light-emitting unit 170 by the light-shielding structure 154, improving the brightness of the display panel 100 and the display device, and thus improving the display effect of the display panel 100 and the display device.

[0049] For example, the light-shielding structure 154 can be formed by printing or coating.

[0050] For example, the material of the light-shielding structure 154 may include ink.

[0051] For example, the color of the light-shielding structure 154 can be gray, black, or other dark colors.

[0052] In some embodiments, the orthographic projection of the first planarization layer 130 onto the substrate 140 lies within the first region 100a and the second region 100b. The thickness of the first planarization layer 130 in the first region 100a is greater than the thickness of the first planarization layer 130 in the second region 100b. That is, the first planarization layer 130 is provided in both the first region 100a and the second region 100b, and the first planarization layer 130 in the second region 100b is thinned. Thus, after the first planarization layer 130 is thinned, space is released in the second region 100b to accommodate the light-shielding structure 154, thereby improving the second region 100b's capacity to accommodate the light-shielding structure 154. In other words, the storage recess 133 penetrates a portion of the thickness of the first planarization layer 130, and a thinner first planarization layer 130 is retained between the storage recess 133 and the first surface 141. The thickness of the first planarization layer 130 between the storage recess 133 and the first surface 141 is less than the thickness of the remaining portion of the first planarization layer 130. Thus, the depth of the storage recess 133 is relatively small, and the first planarization layer 130 located between the storage recess 133 and the first surface 141 can protect the underlying film layer. Specifically, the first planarization layer 130 located in the first region 100a is a first sub-planarization layer 131, and the first planarization layer 130 located in the second region 100b is a second sub-planarization layer 132. The thickness of the first sub-planarization layer 131 is greater than the thickness of the second sub-planarization layer 132. The side of the second sub-planarization layer 132 facing away from the substrate and the side of the first sub-planarization layer 131 facing the second region 100b together form at least a portion of the storage recess 133.

[0053] In an embodiment where a second passivation layer 152 is provided, the second passivation layer 152 located in the second region 100b can form the bottom wall of the storage recess 133.

[0054] For example, a portion of the sidewall of the first sub-planarization layer 131 facing the second sub-planarization layer 132 includes a first end near the substrate 140 and a second end away from the substrate 140. The second end is inclined relative to the first end in a direction away from the second sub-planarization layer 132. By inclining this portion of the sidewall, the first sub-planarization layer 131 and the second sub-planarization layer 132 can transition smoothly. The first sub-planarization layer 131 at this portion of the sidewall protrudes beyond the second sub-planarization layer 132 in a direction away from the substrate and is higher than the second sub-planarization layer 132. At this time, along a cross-section parallel to the first surface 141, the cross-sectional area of ​​the storage recess 133 gradually increases from the substrate to the light-emitting unit.

[0055] In some examples, see Figure 3The thickness of the first planarization layer 130 located in the second region 100b gradually decreases from the first region 100a to the second region 100b. This is equivalent to the thickness of the first planarization layer 130 (i.e., the second sub-planarization layer 132) located between the storage recess 133 and the first surface 141 gradually decreasing from the center to the edge of the first surface 141. This results in a larger thickness at the end of the second sub-planarization layer 132 closer to the center of the first surface 141, which is beneficial to improving the protective effect of that end on the underlying film layer. In addition, the thickness of the second sub-planarization layer 132 further away from the center of the first surface 141 is smaller, resulting in a larger depth of the storage recess 133 at that end, which is beneficial to improving the storage recess 133's capacity to accommodate the light-shielding structure 154.

[0056] It should be noted that the thickness of the film gradually decreases from the center to the edge of the first surface 141, indicating that the thickness of the film decreases from the center to the edge of the first surface 141. The thickness of the film can decrease continuously or intermittently, but the overall trend is decreasing.

[0057] In other embodiments, see Figure 2 The orthographic projection of the first planarization layer 130 onto the substrate 140 lies within the first region 100a, and the orthographic projection of the first planarization layer 130 onto the substrate 140 does not overlap with the second region 100b. In this case, the first planarization layer 130 is not provided in the second region 100b. For example, the side of the second planarization layer 120 located in the second region 100b facing away from the substrate 140 and the side of the first planarization layer 130 facing the second region 100b together form at least a partial storage recess 133. Thus, the absence of the first planarization layer 130 between the storage recess 133 and the first surface 141 results in a greater depth of the storage recess 133, which is beneficial for improving the storage recess 133's capacity to accommodate the light-shielding structure 154 and for improving the second region 100b's capacity to accommodate the light-shielding structure 154.

[0058] In an embodiment where a second passivation layer 152 is provided, the second passivation layer 152 located in the second region 100b can form the bottom wall of the storage recess 133.

[0059] In some embodiments, the display panel 100 includes a third region 100c, at least a portion of which is located on the side of the second region 100b away from the first region 100a. The thickness of the light-shielding structure 154 in the third region 100c is greater than that in the second region 100b. Thus, the third region 100c has a stronger capacity to accommodate the light-shielding structure 154, resulting in a larger thickness of the light-shielding structure 154 in the third region 100c. The third region 100c increases the capacity of the edge region to accommodate the light-shielding structure 154, making it less likely for the uncured light-shielding structure 154 to rise to the side of the light-emitting unit 170 located in the edge region away from the substrate 140. This reduces the possibility of convergence of the light-shielding structure 154 in the edge region, which is beneficial to improving the light extraction efficiency of the light-emitting unit 170 located at the edge of the substrate 140, thereby improving the light extraction efficiency of the display panel 100.

[0060] In some embodiments, see Figure 2 The display panel 100 includes a connecting pad 157, which is located at the edge of the first surface 141 along the first direction X. For example, the connecting pad 157 is located at the edge of the first region 100a along the first direction X, and the connecting pad 157 is located in the third region 100c. The connecting pad 157 is used for connecting to electronic components on the second surface 142 of the substrate 140. Figure 2 (Not shown in the image) is connected to the first surface 141. By placing this electronic component on the second surface 142, it is beneficial to increase the arrangement density of the light-emitting units 170 on the first surface 141.

[0061] In some embodiments, see Figure 1 In the third region 100c, the surface of the light-shielding structure 154 facing away from the substrate 140 and the side of the light-shielding structure 154 facing away from the second region 100b are connected by a first arc surface, which protrudes in the direction away from the substrate. The thickness of the light-shielding structure 154 at the first arc surface gradually decreases in the direction away from the first region 100a.

[0062] In some embodiments, see Figure 2 The display panel 100 may include a side trace 158, one end of which is electrically connected to a connecting pad 157. The side trace 158 extends along the side A of the substrate 140 to the side of the substrate 140 opposite to the light-emitting unit 170, so that the side trace 158 can be connected to electronic components disposed on the second surface 142 of the substrate 140.

[0063] In some embodiments, see Figure 4 and Figure 5aMultiple light-emitting units 170 are arranged in multiple rows along a first direction X. Each row of light-emitting units 170 includes multiple light-emitting units 170 arranged along a second direction Y. The multiple rows of light-emitting units 170 include a first row of light-emitting units. The overlap size between the orthographic projection of the first row of light-emitting units on the substrate 140 and the second region 100b is a first dimension. The dimension of the first row of light-emitting units along the first direction X is a second dimension. The ratio of the first dimension to the second dimension is in the range of 0.5-1. The number of rows of light-emitting units 170 located on the side of the first row of light-emitting units facing the edge of the display panel 100 is less than or equal to 2, that is, the second region 100b can cover 0.5-3 rows of the second region 100b. Figure 5a The dashed box B in the diagram shows a row of light-emitting units 170. This design avoids the second region 100b being too small in size along the direction from the first region 100a to the second region 100b, thus preventing insufficient capacity to accommodate the light-shielding structure 154. Additionally, it avoids the second region 100b being too large along the direction from the first region 100a to the second region 100b, thus preventing it from exceeding the areas where light-shielding structure 154 is prone to convergence. This also prevents the fourth conductive layer M4 from significantly affecting the overflow of the light-shielding structure 154, thereby improving the uniformity of the light-shielding structure 154. The A-row light-emitting unit 170 is the outermost A-row light-emitting unit 170. The ratio of the size of the 0.5-row light-emitting unit 170 along the first direction X to the size of a single row of light-emitting units 170 along the first direction X is 0.5.

[0064] For example, the ratio of the first dimension to the second dimension can be in the range of 0.5-1, and can be 0.5, 0.6, 0.7, 0.8, 0.9, or any value between 0.5 and 1.

[0065] In some embodiments, see Figure 4 and Figure 5b The second region 100b may be located on at least one side of the first region 100a along the first direction. For example, the storage recess 133 may include a first sub-storage recess 1331 located at the edge of the first surface 141 along the first direction X. The storage recess 133 may also include a second sub-storage recess 1332 located at the edge of the first surface 141 along the other side of the first direction X.

[0066] In an embodiment where a first sub-storage recess 1331 and a second sub-storage recess 1332 are provided simultaneously, the first planarization layer 130 located on both sides of the first surface 141 along the first direction X can form a thinned second sub-planarization layer 132 by weak exposure, so as to meet the storage and accommodation of the uncured light-shielding structure 154.

[0067] In some embodiments, see Figure 5bThe second region 100b may be located on at least one side of the first region 100a along the first direction, and the second region 100b is not located on both sides of the first region 100a along the second direction.

[0068] In other embodiments, see Figure 5c and Figure 5d The second region 100b may be located on at least one side of the first region 100a along a first direction, and the second region 100b is also located on at least one side of the first region 100a along a second direction. See some examples. Figure 5c The width of the second region 100b located on at least one side of the first region 100a along the first direction can be equal to the width of the second region 100b located on at least one side of the first region 100a along the second direction. See also some other examples. Figure 5d The width of the second region 100b located on at least one side of the first region 100a along the first direction is greater than the width of the second region 100b located on at least one side of the first region 100a along the second direction. The width of the second region 100b can be the dimension of the second region 100b along the direction from the first region 100a to the second region 100b.

[0069] See Figure 1 The display panel 100 may have a first direction X, a second direction Y, and a third direction Z, all of which are different. The first direction X and the second direction Y can be any two different directions parallel to the display panel 100, and the third direction Z can be any direction intersecting a plane parallel to the display panel 100. For example, the first direction X, the second direction Y, and the third direction Z can be perpendicular to each other. For example, the first direction X can be the width direction of the display panel 100, the second direction Y can be the length direction of the display panel 100, and the third direction Z can be the thickness direction of the display panel 100. The length, width, and thickness in the embodiments of this application are merely for descriptive convenience and do not imply any limitation on the dimensions. For example, the width can be greater than, equal to, or less than the length. The orientation of the display panel 100 can be consistent with the orientation of the film layers such as the substrate 140.

[0070] In some examples, the storage recess 133 may be located on both sides of the first surface 141 along the first direction X, and the storage recess 133 may also be located on both sides of the first surface 141 along the second direction Y. For example, when manufacturing the display panel 100, the two sides of the display panel 100 along the first direction X and the two sides along the second direction Y may be cut and ground first, and then the light-shielding structure 154 may be formed.

[0071] See another example. Figure 4The storage recess 133 can be located on both sides of the first surface 141 along the first direction X, but not on both sides of the first surface 141 along the second direction Y. For example, when manufacturing the display panel 100, the two sides of the display panel 100 along the first direction X can be cut and ground first, and then the light-shielding structure 154 can be formed. Then, the two sides of the display panel 100 along the second direction Y can be cut and ground. If the light-shielding structure 154 located on both sides of the first surface 141 along the second direction Y causes the aforementioned problem of convergence affecting the light output efficiency, the light-shielding structure that affects the light output efficiency can be ground off during the cutting and grinding process.

[0072] In some embodiments, the outer contours of the orthographic projections of the plurality of light-emitting units 170 and the first planarization layer 130 on the plane of the first surface 141 are all located within the outer contour of the first surface 141. The distance between the outer contour of the orthographic projection of the first planarization layer 130 on the plane of the first surface 141 and the outer contour of the first surface 141 along the second direction Y is a first distance; the distance between the orthographic projections of the plurality of light-emitting units 170 on the plane of the first surface 141 and the outer contour of the first surface 141 along the second direction Y is a second distance, and the first distance is less than the second distance. Thus, the first planarization layer 130 is closer to the edges of the first surface 141 along the second direction Y than the light-emitting units 170, resulting in a larger coverage area of ​​the first planarization layer 130 along the second direction Y. This is beneficial to improving the protective effect of the first planarization layer 130 on the underlying film layer. In addition, in embodiments where the storage recess 133 is not provided on the edges of the first surface 141 along the second direction Y, the first planarization layer 130 can provide a wider range of flat surfaces for subsequent film layers.

[0073] In some embodiments, see Figure 1 The light-emitting unit 170 includes a light-emitting functional part 173, a first electrode 171, and a second electrode 172. The first electrode 171 and the second electrode 172 are disposed on the side of the light-emitting functional part 173 facing the substrate 140, and the first electrode 171 and the second electrode 172 are spaced apart, that is, there is a gap 174 between the first electrode 171 and the second electrode 172. One of the first electrode 171 and the second electrode 172 can be an anode, and the other can be a cathode. In this embodiment, the first electrode 171 is used as an anode and the second electrode 172 is used as a cathode for illustration.

[0074] In some embodiments, a partial light-shielding structure 154 is also located in the gap 174. This partial light-shielding structure 154 is located between the first electrode 171 and the second electrode 172. Through this partial light-shielding structure 154 and the partial light-shielding structure 154 located between two adjacent light-emitting units 170, the first electrode 171 and the second electrode 172 of the light-emitting unit 170, as well as the first conductive element and the second conductive element, can be well covered, avoiding reflection caused by exposure of the first electrode 171 and the second electrode 172, as well as the first conductive element and the second conductive element. The first conductive element and the second conductive element can be located in the fourth conductive layer M4. The first conductive element is electrically connected to the first electrode 171, and the second conductive element is electrically connected to the second electrode 172.

[0075] In some embodiments, the first planarization layer 130 is located outside the gap 174. Since the gap 174 between the first electrode 171 and the second electrode 172 has a limited dimension along the thickness direction of the substrate 140, by not placing the first planarization layer 130 inside the gap 174, it is possible to prevent the first planarization layer 130 from occupying the space of the gap 174 and affecting the flow of the light-shielding structure 154 into the gap 174, which is beneficial to reducing reflection.

[0076] In some embodiments, see Figure 5e and Figure 6 The display panel 100 includes at least one repellent 180 with a through-hole 181. At least a portion of the light-emitting units 170 located at the edge of the display panel 100 are correspondingly provided with repellents 180. The repellents 180 surround the outer periphery of the corresponding light-emitting functional portion 173 and are located between the corresponding light-emitting functional portion 173 and the light-shielding structure 154. The light-emitting functional portion 173 is located in the through-hole 181 of the corresponding repellent 180. The repellent 180 may be formed of a material that repels the uncured light-shielding structure 154. The distance between the surface of the repellent 180 facing away from the substrate 140 and the substrate 140 is greater than or equal to the distance between the surface of the light-emitting functional portion 173 facing away from the substrate 140 and the substrate 140, such that the repellent 180 protrudes from the light-emitting unit 170 in a direction facing away from the substrate 140. The repellent 180 can be used to prevent the uncured light-shielding structure 154 from flowing towards the center of the light-emitting unit 170.

[0077] For example, the material of the repellent 180 may include a fluorinated resin, which has liquid-repellent properties that cause uncured light-shielding structure 154 (e.g., ink) to be repelled. Of course, the material of the repellent 180 may also be other materials.

[0078] In this embodiment, the correspondence between A and B can refer to either one A corresponding to at least one B, or one B corresponding to at least one A. This embodiment uses the example of one A corresponding to one B for illustration.

[0079] In some embodiments, see Figure 7 In the corresponding light-emitting functional part 173 and the repelling member 180, the opening area of ​​the through hole 181 at the end of the repelling member 180 away from the substrate 140 is the first area. The first area gradually increases from the direction along the substrate 140 to the light-emitting unit 170. For example, the end of the repelling member 180 away from the substrate 140 is inclined in a direction away from the center of the corresponding light-emitting unit 170, which can make the surface of the light-shielding structure 154 away from the substrate 140 farther from the light-emitting unit 170, which can improve the repulsion effect and help to better prevent the uncured light-shielding structure 154 from flowing towards the center of the light-emitting unit 170.

[0080] In some embodiments, see Figure 7 At least a portion of the light-emitting units 170 located at the edge of the display panel 100 are provided with repulsion grooves 183. The repulsion grooves 183 are located between the light-shielding structure 154 and the light-emitting functional part 173, and surround the outer periphery of the corresponding light-emitting functional part 173. The light-shielding structure 154 and the light-emitting functional part 173 are separated by the repulsion grooves 183. That is, at least a portion of the light-emitting units 170 located at the edge of the display panel 100 have repulsion grooves 183 between their light-emitting functional parts 173 and the light-shielding structure 154.

[0081] See some examples. Figure 7 At least a portion of the repellent element 180 may be located in the corresponding repellent groove 183. The repellent element 180 may be formed before the light-shielding structure 154, and may be retained after the light-shielding structure 154 has cured.

[0082] See other examples. Figure 8 The repellent element 180 can be formed before the light-shielding structure 154. After the light-shielding structure 154 has cured, the repellent element 180 can be removed, re-exposing the repellent groove 183. The repellent groove 183 prevents the light-shielding structure 154 from contacting the light-emitting functional part 173. Subsequently, a first encapsulation layer 161 can be formed, which is also located in the repellent groove 183. In this way, a wider range of materials can be selected for the repellent element 180, without having to consider whether the repellent element 180 will affect the light emission of the light-emitting unit 170.

[0083] In some embodiments, see Figure 1The first encapsulation layer 161 can be located in the first region 100a, the second region 100b, and the third region 100c. In the third region 100c, the surface of the first encapsulation layer 161 facing away from the substrate 140 and the side of the first encapsulation layer 161 facing away from the second region 100b are connected by a second arc surface, which protrudes in the direction away from the substrate. The thickness of the first encapsulation layer 161 at the second arc surface gradually decreases in the direction away from the first region 100a.

[0084] In some embodiments, the orthographic projection of the first encapsulation layer 161 on the substrate lies within the outer contour of the orthographic projection of the light-shielding structure 154 on the substrate.

[0085] In some embodiments, see Figure 1 The outer contour of the third planarization layer 110 projected onto the plane of the first surface 141 is located within the outer contour of the projected onto the plane of the first surface 141. The outer contour of the second planarization layer 120 projected onto the plane of the first surface 141 is located within the outer contour of the projected onto the plane of the third planarization layer 110. Thus, by distancing the third planarization layer 110 and the second planarization layer 120 from the outer contour of the first surface 141 at a certain distance, and by setting the third planarization layer 110 and the second planarization layer 120 at intervals from the outer contour of the first surface 141, peeling of the edges of the third planarization layer 110 and the second planarization layer 120 can be prevented during the cutting and grinding process.

[0086] In some embodiments, the outer contour of the first planarization layer 130 projected onto the plane containing the first surface 141 is located within the outer contour of the second planarization layer 120 projected onto the plane containing the first surface 141. The distance between the first planarization layer 130 and the outer contour of the first surface 141 is greater than the distance between the third planarization layer 110 and the second planarization layer 120 and the outer contour of the first surface 141, so as to form a storage recess 133 that accommodates the light-emitting unit 170 located in the edge region and the light-shielding structure 154 located in the edge region, thereby alleviating the poor light emission caused by the convergence problem of the uncured light-shielding structure 154.

[0087] In some embodiments, see Figure 1The display panel 100 also includes an array layer located between the substrate 140 and the light-emitting unit 170. Pixel circuits are disposed in the array layer and connected to the light-emitting unit 170. Each pixel circuit includes a transistor T, which may include an active layer, a gate, a first electrode, and a second electrode. The active layer may be located on the semiconductor layer 191, the gate may be located on the first conductive layer M1, the first electrode and the second electrode may be located on the second conductive layer M2, and the first and second conductive elements may be located on the fourth conductive layer M4. The fourth conductive layer M4 can be connected to the second conductive layer M2 via a third conductive layer M3. A fifth conductive layer Mc is disposed between the first conductive layer M1 and the second conductive layer M2. A portion of the fifth conductive layer Mc and a portion of the second conductive layer M2 can form a capacitor structure. A sixth conductive layer M0 is disposed on the side of the semiconductor layer 191 facing away from the first conductive layer M1, and the sixth conductive layer M0 overlaps with the active layer along the thickness direction of the substrate 140.

[0088] See Figure 1 The sixth conductive layer M0, semiconductor layer 191, first conductive layer M1, fifth conductive layer Mc, second conductive layer M2, third conductive layer M3, and fourth conductive layer M4 can be sequentially stacked along the direction away from the substrate 140. An insulating layer 153 can be disposed between each two adjacent layers of the sixth conductive layer M0, semiconductor layer 191, first conductive layer M1, fifth conductive layer Mc, second conductive layer M2, third conductive layer M3, and fourth conductive layer M4. The insulating layer between the second conductive layer M2 and the third conductive layer M3 includes a first passivation layer 151 and a third planarization layer 110 sequentially disposed along the direction away from the substrate 140. The insulating layer between the third conductive layer M3 and the fourth conductive layer M4 can be a second planarization layer 120.

[0089] For example, one of the first and second terminals of transistor T can be the source, and the other can be the drain.

[0090] In some embodiments, see Figure 1 The display panel 100 includes a second passivation layer 152, which is located on the side of the first planarization layer 130 facing away from the substrate 140 and is located within the storage recess 133. The second passivation layer 152 can cover the edges of the first and second conductive elements, and can protect the array layer from the influence of the external environment, thereby improving the stability and reliability of the display panel 100.

[0091] In some embodiments, at least a portion of the insulating layer 153 between the substrate 140 and the active layer may be a barrier layer to prevent substances such as water and oxygen from entering the transistor and thus avoiding any impact on the transistor's performance.

[0092] For example, the materials of the first electrode 171, the second electrode 172, any conductive layer (e.g., M0-M4, Mc), the side trace 158, and the connecting pad 157 can be metals such as titanium, silver, copper, aluminum, and molybdenum, or alloys, or conductive oxides (such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), aluminum zinc oxide (AZO), zinc gallium oxide, titanium tantalum oxide, tin oxide, cadmium oxide, and indium oxide, any one or more of these.

[0093] For example, the material of the insulating layer 153 can be silicon nitride, silicon oxynitride, silicon oxide, or various organic insulating materials, or metal oxides with high dielectric constants such as aluminum oxide, tantalum oxide, etc.

[0094] In some embodiments, see Figure 1 The display panel 100 includes a first encapsulation layer 161, which is located on the side of the light-shielding structure 154 and the light-emitting unit 170 that faces away from the substrate 140. For example, the first encapsulation layer 161 can be a transparent ink.

[0095] In some embodiments, see Figure 1 The display panel 100 includes a second encapsulation layer 162, which is located on the side of the first encapsulation layer 161 facing away from the substrate 140. For example, the second encapsulation layer 162 can be a 3A composite film.

[0096] In some embodiments, see Figure 1 The display panel 100 includes a third encapsulation layer 163, which covers the side of the side trace 158 away from the substrate 140.

[0097] In some embodiments, see Figure 1 The display panel 100 includes a filler layer 156, which is located on the side of the third encapsulation layer 163 away from the side trace 158, and on the side of the second encapsulation layer 162 facing the substrate 140.

[0098] In some embodiments, see Figure 1 The display panel 100 includes a side light-shielding structure 155, which is located on the side of the filler layer 156 opposite to the side A of the substrate 140. The side light-shielding structure 155 may also be located on the edge of the second encapsulation layer 162 opposite to the first encapsulation layer 161. The side light-shielding structure 155 helps reduce the visibility of the seam when two adjacent display panels 100 are spliced ​​together.

[0099] In some embodiments, the display panel 100 may include a mini light-emitting diode display (Mini LED) or a micro light-emitting diode display (Micro LED). This application describes the embodiment where the display panel 100 is a micro light-emitting diode display.

[0100] It should be noted that, Figure 3 , Figure 4 , Figures 6-8 The film layer between the substrate 140 and the first planarization layer 130 is omitted.

[0101] For example, the display panel 100 can be a frameless splicing display panel.

[0102] The display device 10 provided in the embodiments of this application will be described below.

[0103] See Figure 9 This application provides a display device 10, which includes the display panel 100 in any of the above embodiments. Therefore, the display device 10 also has the beneficial effects of the display panel 100 in the above embodiments. The similarities can be understood with reference to the explanation of the display panel 100 above, and will not be repeated here.

[0104] For example, the display device 10 can be a mobile phone or any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. This application embodiment does not make any special limitation in this regard.

[0105] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate, a light emitting unit located on one side of the substrate, a light shielding structure located on the same side of the substrate as the light emitting unit, the light shielding structure at least partially surrounding the light emitting unit; The display panel comprises a first region and a second region, the first region being located on the side of the second region away from the edge of the display panel; wherein, The thickness of the light shielding structure located in the first region is less than the thickness of the light shielding structure located in the second region.

2. The display panel of claim 1, wherein, The display panel comprises a first planarization layer, the first planarization layer being located on the side of the light shielding structure facing the substrate; The orthographic projection of the first planarization layer on the substrate is located within the first region and does not overlap the second region.

3. The display panel of claim 1, wherein, The display panel comprises a first planarization layer, the first planarization layer being located on the side of the light shielding structure facing the substrate; The orthographic projection of the first planarization layer on the substrate is located within the first region and does not overlap the second region.

4. The display panel of claim 3, wherein, The thickness of the first planarization layer located in the second region gradually decreases from the first region to the second region.

5. The display panel according to any of claims 2-4, characterized in that, The display panel comprises a third region, at least part of the third region being located on the side of the second region away from the first region, the thickness of the light shielding structure located in the third region being greater than the thickness of the light shielding structure located in the second region.

6. The display panel of any of claims 1-4, wherein, The display panel comprises a connection pad, the connection pad being located on the edge of the first region on one side along a first direction, the light emitting unit being a plurality of light emitting units, a plurality of the light emitting units being arranged into multiple rows along the first direction, one row of the light emitting units comprising a plurality of the light emitting units arranged along a second direction, any two of the first direction, the second direction and the thickness direction of the substrate intersecting; A plurality of rows of the light emitting units comprise a first row of light emitting units, the overlapping size of the orthographic projection of the first row of light emitting units on the substrate with the second region being a first size, the size of the first row of light emitting units along the first direction being a second size, the ratio of the first size to the second size being in the range of 0.5-1, the number of rows of the light emitting units located on the side of the first row of light emitting units facing the edge of the display panel being less than or equal to 2.

7. The display panel of any of claims 2-4, wherein, The outer contour of the orthographic projection of the first planarization layer on the substrate is a first distance from the outer contour of the substrate along a second direction; the orthographic projection of the light emitting unit on the substrate is a second distance from the outer contour of the substrate along the second direction, the first distance being less than the second distance, the second direction intersecting the thickness direction of the substrate.

8. The display panel of any of claims 2-4, wherein, The light emitting unit comprises a light emitting functional part, a first electrode and a second electrode, the first electrode and the second electrode having a gap therebetween and being located on the side of the light emitting functional part facing the substrate; part of the light shielding structure is also located in the gap; the first planarization layer is located outside the gap.

9. The display panel according to any one of claims 1-4, wherein, The light emitting unit comprises a light emitting functional part; the display panel comprises at least one repelling member having a through hole therein, and at least part of the light emitting units located at the edge of the display panel are provided with the repelling member, the repelling member is arranged around the outer periphery of the corresponding light emitting functional part and is located between the corresponding light emitting functional part and the light shielding structure. The distance between the surface of the repelling member away from the substrate and the substrate is greater than the distance between the surface of the light emitting functional part away from the substrate and the substrate.

10. The display panel of claim 9, wherein, In the corresponding light emitting functional part and the repelling member, the opening area of the through hole at the end of the repelling member away from the substrate is a first area, and the first area gradually increases in the direction from the substrate to the light emitting unit.

11. The display panel of any of claims 1-4, wherein, The light emitting unit comprises a light emitting functional part, and a repelling groove is arranged between the light emitting functional part of at least part of the light emitting units located at the edge of the display panel and the light shielding structure.

12. A display device, characterized by comprising: The display panel comprises the display panel as claimed in any one of claims 1 to 11.

Images