Display panels, video walls, and display devices

Abstract

This application provides a display panel, a video wall, and a display device. The display panel includes a display area and a border area that at least partially surrounds the display area. The display area includes a first display area adjacent to the border area and a second display area located in the first display area away from the border area. Within a unit area, the light-transmitting area of ​​the first display area is greater than that of the second display area. This allows for the equal lifespan design of the light-emitting units per unit area in different areas of the display panel while ensuring the display quality. Simultaneously, it visually reduces the impact of the border area on the display effect, increases the screen-to-body ratio, reduces the sense of fragmentation in the video wall display, and improves the user experience.

Description

Technical Field

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

[0002] With the development of electronic display products, consumers have increasingly higher demands for screen-to-body ratio. However, current display panels are limited by technology, resulting in non-bezel areas at the edges, which still need improvement in visual effect. On one hand, for a single display screen, the presence of bezels reduces the screen-to-body ratio, limiting the visual experience and impacting user experience to some extent. On the other hand, with the development of industries such as outdoor advertising and indoor education, large-screen displays have become an important branch of the display industry. Video wall displays are composed of multiple independent displays, with seams between them. The size of these seams directly affects the display effect, but the bezels cannot be eliminated with current encapsulation technology, only reduced; therefore, seams are always present. The presence of these seams causes the pixel pitch at the seam to differ from that in the central area, with a larger pixel pitch at the seam, resulting in a fragmented image. Summary of the Invention

[0003] This application proposes a display panel, a video wall, and a display device to solve the problem of poor display effect caused by the presence of border areas in the display panel.

[0004] According to a first aspect of the embodiments of this application, a display panel is provided, the display panel including a display area and a border area at least partially surrounding the display area. The display area includes a first display area adjacent to the border area and a second display area located in the first display area away from the border area; per unit area, the light-transmitting area of ​​the first display area is greater than the light-transmitting area of ​​the second display area.

[0005] As can be seen from the above embodiments, within a unit area of ​​the display panel, the light-transmitting area of ​​the first display area is larger than that of the second display area. On one hand, the first display area and the adjacent border area can be considered as a whole as an "edge region," and the border area can be considered as a non-light-emitting area within the "edge region." For example... Figure 2As shown, when the light-emitting unit array is arranged on the display panel, the light-emitting area of ​​the edge region (first display area and border area) per unit area is smaller than the light-emitting area of ​​the second display area per unit area. The non-light-emitting area of ​​the edge region can be used to form the border area. This application, by sacrificing the light-emitting area of ​​the light-emitting units adjacent to the border in related technologies to form the border area, can reduce the screen-to-body ratio of independent displays or improve the sense of screen fragmentation caused by the seam area of ​​splicing screens. However, at the same time, when the light-emitting area of ​​the edge region per unit area is smaller than the light-emitting area of ​​the second display area, it will cause a difference in the lifespan of the light-emitting units in the edge region and the light-emitting units in the second display area per unit area, resulting in uneven lifespan of the light-emitting units in various areas of the display screen, which will affect the screen display and user experience. Therefore, by increasing the light-transmitting area of ​​the first display area to be greater than that of the second display area, and simultaneously adjusting the luminous intensity of the light-emitting units in the first display area to be less than that in the second display area during operation, it is possible to extend the lifespan of the light-emitting units in the first display area while ensuring consistent display brightness. This results in the lifespan of the light-emitting units in the edge area per unit area being the same as that in the second display area, ensuring the display quality of the display panel. At the same time, it visually reduces the impact of the bezel area on the display panel's display effect, increases the screen-to-body ratio in terms of visual effect, reduces the sense of fragmentation in the spliced ​​screen display, and improves the user experience.

[0006] In one embodiment, the display panel includes: a substrate, a pixel defining layer, a plurality of light-emitting units, and a color filter layer. The pixel defining layer is located on one side of the substrate and has a plurality of pixel openings. The plurality of light-emitting units are located within the pixel openings. The color filter layer is located on the side of the pixel defining layer away from the substrate. The color filter layer includes a black matrix and a plurality of light-filtering units. The black matrix is ​​disposed corresponding to the pixel openings, and the light-filtering units are disposed corresponding to the light-emitting units. The light-filtering units are located in a filtering region, which includes a first filtering region located in the first display region and a second filtering region located in the second display region. The light-transmitting area of ​​the first filtering region is larger than the light-transmitting area of ​​the second filtering region.

[0007] In one embodiment, the display panel further includes a fill layer located on the side of the color filter layer away from the pixel defining layer. The fill layer is located in the first filter region. The filter unit is located in the second filter region.

[0008] In one embodiment, the filtering unit includes a first filtering unit located in the first filtering area and a second filtering unit located in the second filtering area, wherein the size of the first filtering unit in the direction perpendicular to the display panel is smaller than the size of the second filtering unit in the direction perpendicular to the display panel.

[0009] In one embodiment, the filtering unit includes a first filtering unit located in the first filtering region and a second filtering unit located in the second filtering region, wherein the area of ​​the first filtering unit near the pixel defining layer is larger than the area of ​​the second filtering unit near the pixel defining layer.

[0010] In one embodiment, the black matrix includes a first black matrix located in the first display area and a second black matrix located in the second display area, wherein the area of ​​the first black matrix near the pixel limiting layer is smaller than the area of ​​the second black matrix near the pixel limiting layer.

[0011] In one embodiment, the display area further includes a driving circuit layer. The driving circuit layer is located on the side of the substrate near the pixel defining layer, and the driving circuit layer is electrically connected to the light-emitting unit.

[0012] In one embodiment, the driving circuit layer includes a plurality of pixel driving circuits, wherein...

[0013] The pixel driving circuit is electrically connected to each of the light-emitting units in a one-to-one correspondence.

[0014] And / or, the pixel driving circuit is electrically connected to the light-emitting unit in a one-to-many correspondence;

[0015] And / or, the pixel driving circuit is electrically connected to the light-emitting unit in a one-to-many correspondence.

[0016] In one embodiment, the border area includes an edge-emitting material defining region and edge-emitting material units. The edge-emitting material defining region is located in the pixel defining layer and has multiple defining regions and defining slots. The edge-emitting material units are located within the defining slots. In one embodiment, the center-to-center distance between the border area and an adjacent light-emitting unit located in the first display area is equal to the center-to-center distance between adjacent light-emitting units within the first display area.

[0017] In one embodiment, the light-emitting unit includes a plurality of sub-light-emitting units, and the sub-light-emitting units in the first display area and the sub-light-emitting units in the second display area are arranged in the same way.

[0018] According to a second aspect of the embodiments of this application, a video wall is also provided. It includes a plurality of display panels as provided in the foregoing embodiments, wherein the border areas of the plurality of display panels are spliced ​​together.

[0019] According to a third aspect of the embodiments of this application, a display device is provided. It includes a display panel or video wall as provided in the foregoing embodiments.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a schematic diagram of the arrangement of light-emitting units in a splicing screen, which is a related technology.

[0023] Figure 2 This is a schematic diagram of the arrangement of light-emitting units in a display panel according to an embodiment of this application;

[0024] Figure 3 This is provided by the embodiments of this application. Figure 2 A cross-sectional view of a portion of the film layer of a display panel obtained along the dashed line AA';

[0025] Figure 4 This is provided by the embodiments of this application. Figure 2 Another cross-sectional view of a portion of the film layer of the display panel obtained along the dashed line AA';

[0026] Figure 5 This is a cross-sectional view of a portion of the film layer of a display panel obtained along the dashed line AA', as provided in an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the film layer of a display panel provided in an embodiment of this application.

[0028] In the picture:

[0029] 100 - Light-emitting unit; 101 - First sub-light-emitting unit; 102 - Second sub-light-emitting unit; 103 - Third sub-light-emitting unit; AA - Display area; AA1 - First display area; AA2 - Second display area; NA - Bezel area; 110 - Substrate; 111 - First barrier layer; 112 - Second barrier layer; 200 - Driving circuit layer; 211 - First source; 212 - Second source; 213 - First drain; 214 - Second drain; 215 - First gate; 216 - Active layer; 217 - Second gate; 221 - First gate insulating layer ; 222-Second gate insulating layer; 230-Interlayer dielectric layer; 240-Passivation layer; 251-First planarization layer; 252-Second planarization layer; 310-First electrode; 320-Pixel defining layer; 330-Second electrode; 400-Encapsulation layer; 500-Color filter layer; 510-Black matrix; 511-First black matrix; 512-Second black matrix; 520-Filter unit; 521-First filter unit; 522-Second filter unit; 600-Dam; 700-Fill layer; 1001-V-groove; 1002-Isolation pillar. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] With the development of technology, consumers have increasingly higher demands for the display screens of electronic display products. Individual displays still face the problem of not achieving 100% screen-to-body ratio. Furthermore, due to the combined effects of bezels and seams, spliced ​​screens can create a strong sense of visual fragmentation. Therefore, OLED (Organic Light-Emitting Diode) can become an important development direction in this field. A spliced ​​screen is composed of multiple independent displays, with a seam (D) between two displays. Figure 1(As shown). The size of the bezel directly affects the display effect. For example, a large narrow bezel in a typical LCD means that content cannot be displayed in the bezel area, resulting in a fragmented display. Therefore, it is necessary to reduce the bezel size. To reduce the bezel size, auxiliary cathode technology can be used to distribute the VSS (ground wire) in the middle of the AA area (Active Area, touchable area), thereby improving the impact of VSS on the bezel. However, the encapsulation bezel cannot be eliminated under current OLED technology, only reduced, so the bezel always exists. However, the pixel structure of OLED is larger. Combined with the large aperture ratio design and the limitations of the fine mask, the bezel area at the splicing point does not emit light and the gap is larger, thus failing to achieve the goal of improving the display effect.

[0033] The display panel, splicing screen, and display device provided in this application are intended to solve the above-mentioned technical problems in related technologies.

[0034] The display panel, splicing screen, and display device in the embodiments of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments can complement or combine with each other.

[0035] This application provides a display panel, such as... Figure 2 As shown, the display area includes a display area AA and a border area NA that at least partially surrounds the display area AA. The display area AA includes a first display area AA1 adjacent to the border area NA, and a second display area AA2 located in the first display area AA1 away from the border area NA. Within a unit area, the light-transmitting area of ​​the first display area AA1 is greater than the light-transmitting area of ​​the second display area AA2.

[0036] In this embodiment, within a unit area of ​​the display panel, the light-transmitting area of ​​the first display area AA1 is greater than that of the second display area AA2. For example, on one hand, the first display area AA1 and the adjacent border area NA can be considered as a whole as an "edge region," and the border area can be considered as a non-light-emitting area within the "edge region." Figure 2 As shown, when the light-emitting unit array is arranged on the display panel, the light-emitting area of ​​the edge region (first display area AA1 and border area NA) per unit area is smaller than the light-emitting area of ​​the second display area AA2 per unit area. The non-light-emitting area of ​​the edge region can be used to form the border area NA. For example: Figure 2As shown, taking a 3*3 light-emitting unit 100 per unit area as an example (3 light-emitting units 100 in the horizontal direction and 3 light-emitting units 100 in the vertical direction), the edge area (first display area AA1 and border area NA) is within the area of ​​3*3 light-emitting units 100 per unit area, that is, it includes SAA1 (2 light-emitting units 100 in the horizontal direction and 3 light-emitting units 100 in the vertical direction, 2*3 light-emitting units 100 can be used for the light-emitting area) and SNA (1 light-emitting unit 100 in the horizontal direction and 3 light-emitting units 100 in the vertical direction, 1*3 light-emitting unit is not used for the light-emitting area), and its light-emitting area is 2*3 light-emitting units 100; the second display area AA2 is within the area of ​​3*3 light-emitting units 100 per unit area, and the light-emitting area includes SAA2, which has 3*3 light-emitting units 100 (3 light-emitting units 100 in the horizontal direction and 3 light-emitting units 100 in the vertical direction, 3*3 light-emitting units 100 can be used for the light-emitting area).

[0037] For example, the light-emitting area can refer to the projected area of ​​the light-emitting unit 100 or the sub-light-emitting unit on the substrate, and the light-transmitting area can refer to the projected area of ​​the portion of the light-emitting unit 100 or the sub-light-emitting unit that controls the light emission on the substrate, such as the projected area of ​​the filter area of ​​the light-emitting unit 100 or the sub-light-emitting unit on the substrate. The unit area can be multiple light-emitting units 100 or sub-light-emitting units, or it can be one light-emitting unit 100 or one sub-light-emitting unit.

[0038] This application uses the light-emitting area of ​​the light-emitting unit adjacent to the bezel in related technologies to form the bezel area NA, which can reduce the screen-to-body ratio of a standalone display or improve the sense of disjointedness in the display caused by the seams of a spliced ​​screen. However, when the light-emitting area of ​​the edge region per unit area is smaller than that of the second display area AA2, it will cause a difference in the lifespan of the light-emitting units in the edge region and the light-emitting units in the second display area AA2 per unit area. This will result in uneven lifespan of the light-emitting units in different areas of the display screen, which will affect the screen display and user experience. Therefore, by increasing the light-transmitting area of ​​the first display area AA1 to be greater than that of the second display area AA2, and simultaneously adjusting the luminous intensity of the light-emitting unit in the first display area AA1 to be less than that in the second display area AA2 during operation, it is possible to extend the lifespan of the light-emitting unit in the first display area AA1 while ensuring consistent display brightness. This results in the lifespan of the light-emitting unit in the edge area within a unit area being the same as that in the second display area AA2, ensuring the display quality of the display panel. At the same time, it visually reduces the impact of the bezel area NA on the display panel's effect, increases the screen-to-body ratio in terms of visual effect, reduces the sense of fragmentation in the spliced ​​screen display, and improves the user experience.

[0039] In some embodiments, the light-emitting unit 100 in this embodiment can be further divided to reduce the size of the light-emitting unit 100 and increase the number of light-emitting units 100 per unit area. This can further improve the pixel density of the display panel, weaken the presence of the bezel area NA and the seam, thereby optimizing the display effect and improving the user experience. For example, as Figures 1-2 As shown, the display panel is further divided, and the area in the display panel that originally had 4 light-emitting units 100 is divided into an area with 12 light-emitting units 100.

[0040] In some embodiments, such as Figures 1-2 As shown, the display panel includes multiple light-emitting units 100, and each light-emitting unit 100 includes multiple sub-light-emitting units. Exemplarily, each light-emitting unit 100 includes a first sub-light-emitting unit 101, a second sub-light-emitting unit 102, and a third sub-light-emitting unit 103, wherein the first sub-light-emitting unit 101, the second sub-light-emitting unit 102, and the third sub-light-emitting unit 103 emit different colors. Exemplarily, the sub-light-emitting units in this embodiment are arranged in a RealRGB configuration. The first sub-light-emitting unit 101 emits red light, the second sub-light-emitting unit 102 emits green light, and the third sub-light-emitting unit 103 emits blue light. The light-emitting area of ​​the blue sub-pixel is larger than that of the red / green sub-pixels. By increasing the light-emitting area of ​​the blue sub-pixels, the lifespan of the blue sub-pixels is increased, thus improving the uniformity of the display panel's display effect.

[0041] It should be noted that the arrangement of sub-light-emitting units also includes Real RGB arrangement, pentile arrangement, diamond arrangement or Delta arrangement, and is not limited to these.

[0042] In some embodiments, such as Figures 3-5 As shown, the display panel includes: a substrate 110, a pixel defining layer 320, a plurality of light-emitting units 100, and a color filter layer 500. The pixel defining layer 320 is located on one side of the substrate 110 and has a plurality of pixel openings. The plurality of light-emitting units 100 are located within the pixel openings. The color filter layer 500 is located on the side of the pixel defining layer 320 away from the substrate 110. The color filter layer 500 includes a black matrix 510 and a plurality of light-filtering units 520. The black matrix 510 is correspondingly disposed to the pixel openings, and the light-filtering units 520 are correspondingly disposed to the light-emitting units 100. The light-filtering units 520 are located in a filtering area, which includes a first filtering area located in a first display area AA1 and a second filtering area located in a second display area AA2. The light-transmitting area of ​​the first filtering area is larger than the light-transmitting area of ​​the second filtering area.

[0043] In this embodiment, the light-transmitting area of ​​the first filter region of the color filter layer 500 is greater than the light-transmitting area of ​​the second filter region. That is, the light transmittance of the first filter region of the color filter layer 500 is greater than the light transmittance of the second filter region (light transmittance can refer to the percentage of luminous flux to incident luminous flux; for example, it can be the percentage of luminous flux passing through the filter region in the light-emitting unit 100 to its incident luminous flux. In some embodiments, for example, if the medium through which the light passes is the same, light transmittance can be calculated as light-transmitting area / light-emitting area). This allows the light-emitting area corresponding to the first filter region to transmit more light than the light-emitting area corresponding to the second filter region. Consequently, the luminous intensity of the light-emitting unit 100 in the first display area AA1 can be weaker than the luminous intensity in the second display area AA2. Furthermore, this can extend the luminous lifespan of the light-emitting unit 100 in the first display area AA1, achieving uniformity in the luminous lifespan of the light-emitting units 100 in the display panel, improving the display quality of the display panel, and enhancing the user experience.

[0044] It should be noted that this embodiment can employ polarizer-free (color filter on encapsulation, COE) technology. This means that after AMOLED encapsulation is completed, a color filter (CF) is deposited on the side of the encapsulation layer 400 away from the substrate 110. Each pixel has a color filter corresponding to its color, and the gaps between the color filters are separated by a black matrix 510 (BM). The color filters in COE technology can solve the problems of reflection and light transmission. In the external incident light, the unwanted portion is absorbed by the black matrix 510, while the desired portion is reflected through the color filter area. The color filter has a high transmittance for the dominant RGB wavelengths, approximately 70%–90%, which is much higher than that of a polarizer.

[0045] In some embodiments, each light-emitting unit 100 includes a red sub-light-emitting unit, a blue sub-light-emitting unit, and a green sub-light-emitting unit. The color filter layer 500 also includes a red filter area, a blue filter area, and a green filter area that correspond one-to-one with the light-emitting units 100.

[0046] It should be noted that the substrate 110 can be a rigid substrate or a flexible substrate, and the substrate 110 includes insulating materials such as glass, quartz, and polymer resin. Furthermore, the substrate 110 includes CPI (colorless polyimide), PET (polyethylene terephthalate), or UTG (ultra-thin glass).

[0047] In some embodiments, such as Figure 6As shown, a first electrode 310 is provided on the side of the pixel defining layer 320 near the substrate 110, and a second electrode 330 is provided on the side of the pixel defining layer 320 away from the substrate 110. Exemplarily, the first electrode 310 is an anode, which may include ITO or IZO, and the second electrode 330 is a cathode, which may include Mg / Ag.

[0048] In some embodiments, such as Figures 3-5 As shown, the color filter layer 500 has an encapsulation layer 400 on the side near the pixel limiting layer 320. The encapsulation layer 400 includes at least one inorganic film layer for preventing oxygen and water from penetrating into the light-emitting unit 100 in the pixel limiting layer 320.

[0049] In some embodiments, such as Figure 3 As shown, the display panel also includes a fill layer 700, which is located on the side of the color filter layer 500 away from the pixel limiting layer 320. The fill layer 700 is located in the first filter area. The filter unit 520 is located in the second filter area. In this embodiment, the first display area AA1 adopts a color filter skip design, that is, the filter area of ​​the first display area AA1 does not have a color filter (i.e., filter unit 520), while the black matrix 510 is set as usual. After the color filter is deposited, for the hollowed-out color filter area (i.e., the filter area), a fill layer 700 is directly set on it, and the light transmittance of the fill layer 700 can be made greater than the light transmittance of the filter unit 520. This allows the light-emitting area corresponding to the first filter area to transmit more light than the light-emitting area corresponding to the second filter area. As a result, the light intensity of the light-emitting unit 100 in the first display area AA1 can be weaker than that in the second display area AA2. Furthermore, this can extend the lifespan of the light-emitting unit 100 in the first display area AA1, achieve uniformity in the lifespan of the light-emitting units 100 in the display panel, improve the display quality of the display panel, and enhance the user experience.

[0050] In some embodiments, such as Figure 3 As shown, the thickness h2 of the filling layer 700 in the first display area AA1 is greater than the thickness h3 of the filling layer 700 in the border area NA, and greater than the thickness h1 of the filling layer 700 in the second display area AA2. This design helps to balance the light transmittance in the first display area AA1 and the first display area AA2.

[0051] In some embodiments, the filler layer 700 comprises an organic insulating material. The organic insulating material may include imide polymers, commercial polymers (such as polymethyl methacrylate (PMMA) or polystyrene (PS)), polymer derivatives having phenolic groups, acryloyl polymers, aryl ether polymers, amide polymers, fluorinated polymers, p-xylene polymers, or vinyl alcohol polymers.

[0052] In some embodiments, such as Figure 4 As shown, the filter unit 520 includes a first filter unit 521 located in the first filter area and a second filter unit 522 located in the second filter area. The size of the first filter unit 521 in the direction perpendicular to the display panel is smaller than the size of the second filter unit 522 in the direction perpendicular to the display panel.

[0053] In this embodiment, when the light transmittance of the first filter unit 521 per unit size (e.g., per unit area) is the same as that of the second filter unit 522 per unit size, making the thickness of the first filter unit 521 smaller than the thickness of the second filter unit 522 can achieve a light transmittance of the first filter unit 521 greater than that of the second filter unit 522. Furthermore, by adjusting the driving current electrically connected to the corresponding light-emitting unit 100, the luminous intensity of the light-emitting unit 100 in the first display area AA1 can be reduced, thereby extending the luminous lifespan of the light-emitting unit 100 in the first display area AA1, achieving uniformity in the luminous lifespan of the light-emitting units 100 in the display panel, improving the display quality of the display panel, and enhancing the user experience.

[0054] It should be noted that the light transmittance of the first filter unit 521 per unit size and the light transmittance of the second filter unit 522 per unit size may be the same or different. When the light transmittance of the first filter unit 521 per unit size is less than the light transmittance of the second filter unit 522 per unit size, it is necessary to ensure that the thickness of the first filter unit 521 is much smaller than the thickness of the second filter unit 522.

[0055] Furthermore, the difference between the thickness of the first filter unit 521 and the thickness of the second filter unit 522 is related to the ratio of the luminous area of ​​the first display area AA1 per unit area to the luminous area of ​​the second display area AA2 per unit area. Those skilled in the art can flexibly set this value according to actual conditions. For example, the difference between the thickness of the first filter unit 521 and the thickness of the second filter unit 522 is p1, and the ratio of the luminous area of ​​the edge region (including the first display area AA1 and the border area NA) per unit area to the luminous area of ​​the second display area AA2 per unit area is S1, where K = p1 / S1, K = 0.95~1.05. This ensures a smaller brightness difference between the first display area AA1 and the second display area AA2, guaranteeing a better display effect.

[0056] In some embodiments, such as Figure 5 As shown, the filter unit 520 includes a first filter unit 521 located in the first filter area and a second filter unit 522 located in the second filter area. The area of ​​the first filter unit 521 near the pixel limiting layer 320 is larger than the area of ​​the second filter unit 522 near the pixel limiting layer 320.

[0057] In this embodiment, the area of ​​the first filter unit 521 near the pixel limiting layer 320 is larger, which can increase the amount of reflected light when external light is incident on the surface of the light-emitting unit 100, thereby improving the light transmittance of the first filter unit 521. Furthermore, the light intensity of the light-emitting unit 100 in the first display area AA1 can be flexibly adjusted, extending its lifespan, compensating for the reduced light-emitting area caused by the border area NA (non-light-emitting area) in the edge region, improving the uniformity of the light-emitting lifespan of the light-emitting unit 100 in the display panel, improving the display quality of the display panel, and enhancing the user experience.

[0058] It should be noted that when the area of ​​the first filter unit 521 near the pixel limiting layer 320 increases, the area of ​​the corresponding adjacent black matrix 510 near the pixel limiting layer 320 can increase, decrease, or remain unchanged. This can be flexibly chosen according to actual conditions. When the area of ​​the black matrix 510 increases, it is necessary to ensure that the increase in light transmittance after the increase in the area of ​​the filter unit 520 is greater than the increase in light absorption after the increase in the area of ​​the black matrix 510.

[0059] In some embodiments, such as Figure 5 As shown, the black matrix 510 includes a first black matrix 511 located in the first display area AA1 and a second black matrix 512 located in the second display area AA2. The area of ​​the first black matrix 511 near the pixel limiting layer 320 is smaller than the area of ​​the second black matrix 512 near the pixel limiting layer 320.

[0060] This embodiment reduces the area of ​​the black matrix 510 on the side near the pixel limiting layer 320, thereby reducing the light absorption rate of the black matrix 510 and indirectly increasing the light transmittance of the first filter area. This allows for flexible adjustment of the luminous intensity of the light-emitting unit 100 in the first display area AA1, extending the luminous lifespan, compensating for the reduced luminous area at the edge, improving the uniformity of the luminous lifespan of the light-emitting unit 100 in the display panel, and optimizing the application of the display panel and splicing screen in the field of display technology.

[0061] In some embodiments, such as Figures 3-5 As shown, the display area AA also includes a driving circuit layer 200. The driving circuit layer 200 is located on the side of the substrate 110 near the pixel limiting layer 320, and the driving circuit layer 200 is electrically connected to the light-emitting unit 100.

[0062] In some embodiments, the driving circuit layer 200 includes a plurality of pixel driving circuits, and the pixel driving circuits are electrically connected to the light-emitting unit 100 in a one-to-one correspondence.

[0063] For example, such as Figure 2As shown, in this embodiment, the area where one pixel unit is located is divided into nine small pixel units. The nine small pixel units are driven by nine pixel driving circuits respectively, and the nine small pixel units are written with the same data signal.

[0064] In some embodiments, the driving circuit layer 200 includes a plurality of pixel driving circuits, and the pixel driving circuits are electrically connected to the light-emitting unit 100 in a one-to-many correspondence.

[0065] For example, in this embodiment, the area where one pixel unit is located is divided into nine small pixel units, and the nine small pixel units are connected in parallel using the same pixel circuit driver.

[0066] In some embodiments, the driving circuit layer 200 includes a plurality of pixel driving circuits, and the pixel driving circuits are electrically connected to the light-emitting unit 100 in a one-to-one correspondence.

[0067] In some embodiments, such as Figure 6 As shown, the display panel also includes a first barrier layer 111 (barrier 1) and a second barrier layer 112 (barrier 2) sequentially stacked on the substrate 110. The driving circuit layer 200 includes thin-film transistors, each including a first source 211, a second source 212, an active layer 216, a first drain 213, and a second drain 214 connected in sequence, and a first gate 215 and a second gate 217 located on the side of the active layer away from the substrate 110. The driving circuit layer 200 also includes a first gate insulating layer 221, a second gate insulating layer 222, an interlayer dielectric layer 230 (ILD), a passivation layer 240 (PVX), a first planarization layer 251 (PLN1), and a second planarization layer 252 (PLN2) sequentially stacked on the substrate 110.

[0068] In some embodiments, such as Figure 6 As shown, the border region NA includes: an edge-emitting material defining region and an edge-emitting material unit. The edge-emitting material defining region is located in the pixel defining layer 320 and has multiple defining regions and defining slots. The edge-emitting material unit is located within the defining slot.

[0069] In the aforementioned embodiments, the method of sacrificing the space of edge pixels to form the border area NA and reducing the pixel size to improve the display effect will have a certain impact on the manufacturing process. Since in related technologies, masks are usually formed using molds of fixed shapes to create multiple arrayed pixel units, this embodiment retains the process of forming a "pixel limiting layer 320" (edge-emitting material limiting area) in the border area NA to save on mask manufacturing costs, standardize mask models, and simplify the manufacturing process. However, the other film layers of the border area NA are still consistent with the border area NA domain in related technologies. The edge-emitting material units within the edge-emitting material limiting area of ​​the border area NA are not separately connected to driving circuits to ensure that the border area NA domain has sufficient space to form the relevant encapsulation structure. The limiting groove in this embodiment can prevent the emitting materials inside and outside the encapsulation border from connecting together, thereby achieving the effect of isolating encapsulation moisture. For example, the limiting area is provided with multiple isolation pillars 1002 for isolating the emitting materials.

[0070] In some embodiments, such as Figure 6 As shown, the frame area NA where the second planarization layer 252 is located is also provided with multiple V-shaped grooves 1001 to prevent the second planarization layers 252 from connecting and thus avoid moisture erosion. Simultaneously, the frame area NA in this embodiment is provided with a dam 600 to prevent the organic material in the planarization layer from flowing or leaking to the outside. Compared to the related technologies that typically use two dams (DAM) to effectively prevent organic material from being exposed to or leaking to the outside of the display device, this embodiment can initially block the flow of organic material by setting the V-shaped grooves 1001, while also reducing the height of the organic material film layer. Furthermore, combining this with a single dam 600 can effectively prevent organic material from being exposed to or leaking to the outside of the display device, thereby simplifying the manufacturing process and saving packaging costs. It should be noted that the dam 600 can be formed from an organic film such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin.

[0071] In some embodiments, such as Figure 6 As shown, in the border area NA, V-shaped grooves 1001 and isolation pillars 1002 are arranged alternately, and the depth of the V-shaped grooves 1001 is higher than the height of the isolation pillars 1002, so as to block the flow or leakage of organic materials in the second planarization layer 252.

[0072] In some embodiments, such as Figure 6 As shown, in the border area NA, V-shaped grooves 1001 and isolation pillars 1002 are formed on both sides of the dam 600. On the side closer to the display area AA, the distance from the V-shaped groove 1001 to the dam 600 is smaller than the distance from the isolation pillar 1002 to the dam 600, which is beneficial to prevent organic materials from flowing or leaking into the display area AA through the deeper V-shaped groove 1001.

[0073] In some embodiments, such as Figure 6 As shown, in the border area NA, the light-emitting material of the light-emitting unit 100 and the second electrode 330 can also be filled into the V-groove 1001, or the light-emitting material of the light-emitting unit 100 and the second electrode 330 can also be filled into the gap between the V-groove 1001 and the isolation pillar 1002.

[0074] In some embodiments, such as Figure 6 As shown, in the border area NA, the filling layer 700, the black matrix 510, and the encapsulation layer 400 all at least partially overlap with the V-groove 1001 and the isolation pillar 1002, which is beneficial for achieving the planarization of the border area NA. The filling layer 700 and the black matrix 510 both terminate at the side of the dam 600 near the display area AA1 and are in direct contact with the dam 600, which is beneficial for forming a tight encapsulation structure.

[0075] In some embodiments, such as Figure 6 As shown, the length of the black matrix 510 in the border area NA is greater than the length of the black matrix in the first display area AA1 and the second display area AA2. For example, the length of the black matrix 510 in the border area NA is 3 to 5 times the length of the black matrix in the first display area AA1 and the second display area AA2, which is beneficial for blocking light in the border area NA and for flattening the border area NA. In some embodiments, the center-to-center distance between the border area NA and the adjacent light-emitting unit 100 located in the first display area AA1 is equal to the center-to-center distance between adjacent light-emitting units 100 within the first display area AA1.

[0076] In conjunction with the aforementioned embodiments, when the border area NA is provided with edge-emitting material units, it is equivalent to the existence of "pixels" in the edge area. When the original large-sized pixels are divided into small-sized pixels, the center distance between the border area NA and the adjacent light-emitting unit 100 is equal to the center distance between the adjacent light-emitting units 100 in the first display area AA1. This can be achieved when multiple display panels form a splicing screen. It can be regarded as using the pixel area of ​​the edge area to form the border area NA, which can be further regarded as realizing the equal spacing (pitch) design between the pixels of multiple display panels, thereby improving the display fragmentation caused by the low screen ratio in the splicing screen in the related technology.

[0077] In some embodiments, the light-emitting unit 100 includes a plurality of sub-light-emitting units, and the sub-light-emitting units of the first display area AA1 and the second display area AA2 are arranged in the same way. This allows for a regular pixel arrangement to make full use of space.

[0078] Based on the same inventive concept, this application provides a video wall. It includes multiple display panels as described in the foregoing embodiments, with the border areas NA of the multiple display panels spliced ​​together. Therefore, this video wall possesses all the features and advantages of the aforementioned display panels, which will not be repeated here.

[0079] Based on the same inventive concept, this application provides a display device including a display panel or splicing screen as provided in the foregoing embodiments. Thus, the splicing screen possesses all the features and advantages of the aforementioned display panel or splicing screen, which will not be repeated here.

[0080] It should be noted that the display device can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether it contains text or images. More specifically, the intended embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0081] The above embodiments of this application can complement each other without causing conflict.

[0082] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0083] The terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0084] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0085] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0086] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A video wall, comprising a plurality of display panels, each display panel including a display area and a border area at least partially surrounding the display area, wherein the border areas of the plurality of display panels are spliced ​​together, characterized in that, The display area includes a first display area adjacent to the border area, and a second display area located in the first display area away from the border area; Within a unit area, the light-transmitting area of ​​the first display area is greater than that of the second display area; The display panel includes: substrate; A pixel defining layer is located on one side of the substrate, and the pixel defining layer is provided with a plurality of pixel openings; Multiple light-emitting units are located within the pixel opening; A color filter layer is located on the side of the pixel limiting layer away from the substrate. The color filter layer includes a black matrix and a plurality of filter units. The black matrix is ​​disposed corresponding to the pixel opening, and the filter units are disposed corresponding to the light-emitting units. A filling layer is located on the side of the color filter layer away from the pixel defining layer; The display panel further includes an isolation pillar and an encapsulation layer stacked sequentially on one side of the substrate. The isolation pillar is located in the frame area, and the encapsulation layer covers the side of the isolation pillar away from the substrate. The border area includes: An edge-emitting material defining region, located in the pixel defining layer, is formed with multiple defining regions and defining grooves; An edge-emitting material unit is located within the defined groove, the depth of which is greater than the height of the isolation column; The orthographic projections of the filling layer, the black matrix, and the encapsulation layer on the substrate all at least partially overlap with the orthographic projections of the defining groove and the isolation pillar on the substrate.

2. The splicing screen according to claim 1, characterized in that, The filter unit is located in the filter area, which includes a first filter area located in the first display area and a second filter area located in the second display area. The light-transmitting area of ​​the first filter area is greater than the light-transmitting area of ​​the second filter area.

3. The splicing screen according to claim 2, characterized in that, The filling layer is at least partially located in the first filtering region; the filtering unit is located in the second filtering region.

4. The splicing screen according to claim 2, characterized in that, The filter unit includes a first filter unit located in the first filter area and a second filter unit located in the second filter area. The size of the first filter unit in the direction perpendicular to the display panel is smaller than the size of the second filter unit in the direction perpendicular to the display panel.

5. The splicing screen according to claim 2, characterized in that, The filtering unit includes a first filtering unit located in the first filtering region and a second filtering unit located in the second filtering region. The area of ​​the first filtering unit near the pixel limiting layer is larger than the area of ​​the second filtering unit near the pixel limiting layer.

6. The splicing screen according to claim 2, characterized in that, The black matrix includes a first black matrix located in the first display area and a second black matrix located in the second display area. The area of ​​the first black matrix near the pixel limiting layer is smaller than the area of ​​the second black matrix near the pixel limiting layer.

7. The splicing screen according to claim 2, characterized in that, The display area also includes: A driving circuit layer is located on the side of the substrate near the pixel defining layer, and the driving circuit layer is electrically connected to the light-emitting unit.

8. The splicing screen according to claim 7, characterized in that, The driving circuit layer includes multiple pixel driving circuits, wherein... The pixel driving circuit is electrically connected to each of the light-emitting units in a one-to-one correspondence. And / or, the pixel driving circuit is electrically connected to the light-emitting unit in a one-to-many correspondence; And / or, the pixel driving circuit is electrically connected to the light-emitting unit in a one-to-many correspondence.

9. The splicing screen according to claim 2, characterized in that, The center-to-center distance between the border area and the adjacent light-emitting unit located in the first display area is equal to the center-to-center distance between adjacent light-emitting units within the first display area.

10. The splicing screen according to claim 2, characterized in that, The light-emitting unit includes multiple sub-light-emitting units, and the sub-light-emitting units in the first display area and the second display area are arranged in the same way.

11. A display device, characterized in that, Including the splicing screen as described in any one of claims 1 to 10.

Images