Display panel and display device

Abstract

The utility model provides a display panel and a display device.The display panel comprises a display area and a non-display area arranged on the periphery of the display area, the non-display area comprises a virtual pixel area adjacent to the display area, the display panel further comprises a light-emitting layer, and the light-emitting layer comprises a plurality of light-emitting parts and a plurality of virtual light-emitting parts; the thickness of the virtual light-emitting part of the virtual pixel area is smaller than that of the light-emitting part of the display area, so that the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area in the drying process is reduced, and the difference value between the thickness of the light-emitting part at the edge of the display area and the thickness of the light-emitting part in the middle of the display area can be reduced; therefore, the brightness uniformity of the display panel can be improved, and the process yield of the display panel is further improved.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display technology, characterized by self-illumination, wide viewing angle, high contrast, fast response speed, and thinness, has become a major trend in display technology. Compared to the fabrication of OLED devices using fine metal masks and vacuum evaporation, inkjet printing technology has attracted much attention due to its precise alignment, elimination of the need for fine metal masks, and material utilization rate of up to 95%, making it the mainstream trend for the future fabrication of large-size OLED devices.

[0003] Inkjet printing uses liquid as its raw material, which is dried under vacuum to form a solid film. During the drying process, the saturated vapor pressure at the edge of the display area differs from that in the center, resulting in different drying effects at the edges and center. This leads to a difference in the thickness of the light-emitting layer at the edges and center of the display area, causing a difference in brightness between the edges and center of the displayed image and affecting product yield.

[0004] Therefore, it is necessary to provide a display panel and display device to improve this deficiency. Utility Model Content

[0005] The embodiments of this application provide a display panel and a display device that can improve the brightness uniformity of the display panel.

[0006] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, including a display area and a non-display area disposed around the periphery of the display area, the non-display area including a virtual pixel area disposed adjacent to the display area, and the display panel further including:

[0007] The light-emitting layer includes multiple light-emitting parts and multiple virtual light-emitting parts, wherein the light-emitting parts are disposed in the display area and the virtual light-emitting parts are disposed in the virtual pixel area;

[0008] The thickness of the virtual light-emitting part is less than the thickness of the light-emitting part.

[0009] Optionally, the thickness of the virtual light-emitting part closer to the display area is less than the thickness of the virtual light-emitting part farther from the display area.

[0010] Optionally, in the direction from the display area to the virtual pixel area, the thickness of the plurality of virtual light-emitting parts gradually increases.

[0011] Optionally, the ratio of the thickness of the virtual light-emitting part closest to the display area to the thickness of the light-emitting part is greater than or equal to 0.2 and less than or equal to 0.4; and / or

[0012] The ratio of the thickness of the virtual light-emitting part furthest from the display area to the thickness of the light-emitting part is greater than or equal to 0.7 and less than or equal to 0.9.

[0013] Optionally, the virtual pixel area includes at least two sub-virtual pixel areas, wherein one of the sub-virtual pixel areas is located on the side of the other sub-virtual pixel area away from the display area;

[0014] In this sub-virtual pixel region, the thickness of the virtual light-emitting parts is equal; the thickness of the virtual light-emitting part in the sub-virtual pixel region closer to the display area is less than the thickness of the virtual light-emitting part in the sub-virtual pixel region farther from the display area.

[0015] Optionally, the flatness of the virtual light-emitting part is less than the flatness of the light-emitting part.

[0016] Optionally, the flatness of the virtual light-emitting part closer to the display area is less than the flatness of the virtual light-emitting part farther from the display area.

[0017] Optionally, in the direction from the display area to the virtual pixel area, the flatness of the plurality of virtual light-emitting parts gradually increases.

[0018] Optionally, the display panel further includes:

[0019] Multiple first dams are set in the display area to enclose and form multiple first openings, and the light-emitting part is set in the first opening;

[0020] Multiple second dams are set in the virtual pixel area to enclose and form multiple second openings, and the virtual light-emitting part is set in the second opening;

[0021] The height of the first dam is less than or equal to the height of the second dam.

[0022] According to a second aspect of this application, a display device is provided, including a display panel as described above.

[0023] In the display panel of this application embodiment, by setting a virtual pixel area in the non-display area adjacent to the display area, and making the thickness of the virtual light-emitting part in the virtual pixel area smaller than the thickness of the light-emitting part in the display area, the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area during the drying process can be reduced. In this way, the difference in thickness between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area can be reduced, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0027] Figure 1 A top view of a display panel provided for an embodiment of this application;

[0028] Figure 2 An enlarged schematic diagram of the display area and virtual pixel area in a display panel provided for embodiments of this application;

[0029] Figure 3 The first type of display panel provided for embodiments of this application is along Figure 2 The cross-sectional view along the A-A' direction shown;

[0030] Figure 4 The second type of display panel provided for embodiments of this application is along Figure 2 The cross-sectional view along the A-A' direction shown;

[0031] Figure 5 The second type of display panel provided for embodiments of this application is along Figure 2 The cross-sectional view along the A-A' direction shown;

[0032] Figure 6 A schematic diagram of a display device provided for an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0034] The embodiments of this application provide a display panel, which includes a display area and a non-display area disposed around the display area. The non-display area includes a virtual pixel area disposed adjacent to the display area. The display panel also includes a light-emitting layer, which includes a plurality of light-emitting parts and a plurality of virtual light-emitting parts. The light-emitting parts are disposed in the display area, and the virtual light-emitting parts are disposed in the virtual pixel area. The thickness of the virtual light-emitting parts is smaller than the thickness of the light-emitting parts.

[0035] In the embodiments of this application, by setting a virtual pixel area adjacent to the display area in the non-display area, and making the thickness of the virtual light-emitting part in the virtual pixel area smaller than the thickness of the light-emitting part in the display area, the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area during the drying process can be reduced. This can reduce the difference in thickness between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0036] Please see Figure 1 , Figure 1 The top view of the display panel provided in the embodiment of this application shows that the display panel 100 includes a display area AA and a non-display area NA disposed around the display area AA. The non-display area NA includes a virtual pixel area NA1 disposed adjacent to the display area AA.

[0037] In some embodiments, the virtual pixel area NA1 is disposed on at least one side of the display area AA.

[0038] In some embodiments, such as Figure 1 As shown, virtual pixel areas NA1 are provided on the left and right sides and the top and bottom sides of the display area AA, and the virtual pixel areas NA1 form a fully enclosed structure for the display area AA.

[0039] In some embodiments, the virtual pixel area NA1 can be disposed on the left and right sides of the display area AA, or the virtual pixel area NA1 can be disposed on the top and bottom sides of the display area AA.

[0040] Please see Figure 2 and Figure 3 , Figure 2 An enlarged schematic diagram of the display area and virtual pixel area in a display panel provided for embodiments of this application. Figure 3 The first type of display panel provided for embodiments of this application is along Figure 2The cross-sectional view along the A-A' direction shown indicates that the display panel 100 also includes a light-emitting layer 1. The light-emitting layer 1 includes multiple light-emitting parts 11 and multiple virtual light-emitting parts 12. Each light-emitting part 11 can be considered a sub-pixel, and the multiple light-emitting parts 11 are arranged in an array in the display area AA. Each virtual light-emitting part 12 can be considered a virtual sub-pixel, and the multiple virtual light-emitting parts 12 are arranged in an array in the virtual pixel area NA1. When the display panel displays an image, the light-emitting parts 11 emit light according to the driving action of the pixel driving circuit, while the virtual light-emitting parts 12 do not emit light.

[0041] It should be noted that, Figure 2 The arrangement of the light-emitting part 11 in the display area AA and the virtual light-emitting part 12 in the virtual pixel area NA1 is only shown in the illustration and does not represent the number of light-emitting parts in the display area AA and the number of virtual light-emitting parts in the virtual pixel area NA1 in actual applications.

[0042] In the embodiments of this application, the thickness of the virtual light-emitting part 12 is less than the thickness of the light-emitting part 11.

[0043] like Figure 3 As shown, the light-emitting part 11 has a first thickness d1, and the virtual light-emitting part 12 has a second thickness d2, wherein the first thickness d1 is greater than the second thickness d2. It should be noted that the virtual light-emitting part 12 and the light-emitting part 11 used for thickness comparison must be made of the same material, that is, the thickness of the virtual light-emitting part 12 is less than the thickness of the light-emitting part 11 made of the same material.

[0044] For example, among the multiple light-emitting parts 11, there are at least two types of light-emitting parts 11. The different materials of the different types of light-emitting parts 11 result in different light-emitting colors, and the thicknesses of the different types of light-emitting parts 11 may also differ. For example, the multiple light-emitting parts 11 include a light-emitting part, a virtual light-emitting part, and a third light-emitting part. The light-emitting part emits red light, the virtual light-emitting part emits green light, and the third light-emitting part emits blue light. Although the virtual light-emitting part 12 does not emit light, the multiple virtual light-emitting parts also include a first virtual light-emitting part, a second virtual light-emitting part, and a third virtual light-emitting part made of different materials. The first virtual light-emitting part is made of the same material as the light-emitting part, and its thickness is less than that of the light-emitting part; the second virtual light-emitting part is made of the same material as the virtual light-emitting part, and its thickness is less than that of the virtual light-emitting part; the third virtual light-emitting part is made of the same material as the third light-emitting part, and its thickness is less than that of the third light-emitting part.

[0045] In the embodiments of this application, the virtual light-emitting part is formed by drying virtual light-emitting ink, and the light-emitting part is formed by drying light-emitting ink. The virtual light-emitting ink and the light-emitting ink have the same composition. The difference is that the concentration of the virtual light-emitting ink is lower than that of the light-emitting ink, that is, the solvent content in the virtual light-emitting ink is greater than that in the light-emitting ink. The solvent in the ink will evaporate during the drying process, and the solute will solidify into a film. Therefore, when the volume of sprayed ink is the same, the thickness of the virtual light-emitting part formed after the virtual light-emitting ink dries is smaller than that of the light-emitting part formed after the light-emitting ink dries. Because the solvent content in the virtual luminescent ink is higher than that in the luminescent ink, during the drying process, the virtual pixel area NA1 can evaporate more solvent than the display area AA. This increases the saturated vapor pressure at the edge of the display area AA, reducing the difference between the saturated vapor pressure at the edge and the center of the display area AA. Therefore, the drying effect of the luminescent ink at the edge of the display area AA is made more consistent with that in the center of the display area AA. This reduces the thickness difference between the luminescent part at the edge and the luminescent part in the center of the display area, thereby improving the brightness uniformity of the display panel and increasing the process yield of the display panel.

[0046] In some embodiments, such as Figure 3 As shown, the thickness of the virtual light-emitting part 12 near the display area AA is the same as the thickness of the virtual light-emitting part 12 away from the display area AA. It should be noted that, under the same concentration, the same thickness of the virtual light-emitting part 12 near and away from the display area AA means that the volume of ink sprayed in the areas near and away from the display area AA is the same. That is, in the virtual pixel area NA1, only one type of virtual light-emitting ink with the same concentration and volume needs to be sprayed. This not only improves the brightness uniformity of the display panel but also reduces the difficulty of the inkjet printing process.

[0047] In some embodiments, such as Figure 2 and Figure 3 As shown, the display panel 100 also includes a plurality of first dams 3 and a plurality of second dams 4. The plurality of first dams 3 are disposed in the display area AA to enclose and form a plurality of first openings H1, and each light-emitting part 11 is disposed in a corresponding first opening H1. The plurality of second dams 4 are disposed in the virtual pixel area NA1 to enclose and form a plurality of second openings H2, and each virtual light-emitting part 12 is disposed in a corresponding second opening H2.

[0048] In some embodiments, the first dam 3 and the second dam 4 have the same height.

[0049] like Figure 3 As shown, the first dam 3 has a first height h1, and the second dam 4 has a second height h2, with the first height h1 and the second height h2 being equal.

[0050] In some embodiments, such as Figure 3 As shown, the first dam 3 and the second dam 4 are set on the same layer and are made of the same material. The first dam 3 and the second dam 4 belong to different parts of the pixel definition layer.

[0051] In some embodiments, the ratio of the thickness of the virtual light-emitting part 12 to the thickness of the light-emitting part 11 is greater than or equal to 2 and less than or equal to 9. For example, the ratio of the thickness of the virtual light-emitting part 12 to the thickness of the light-emitting part 11 can be 3, 4, 5, 6, 7, 8, or 9, etc.

[0052] It should be noted that, since the concentration of the virtual luminescent ink is lower than that of the luminescent ink, if the thickness ratio of the virtual luminescent part 12 to the luminescent part 11 is too large, the volume of the sprayed virtual luminescent ink needs to be increased to make the thickness of the virtual luminescent part 12 reach the required ratio. This will increase the risk of the virtual luminescent ink overflowing from the second opening H2, leading to a decrease in the production yield of the display panel. If the thickness ratio of the virtual luminescent part 12 to the luminescent part 11 is too small, the volume of the sprayed virtual luminescent ink needs to be reduced to make the thickness of the virtual luminescent part 12 reach the required ratio. This will reduce the saturated vapor pressure at the edge of the luminescent area AA, resulting in a significant difference between the drying effect at the edge of the luminescent area AA and the drying effect in the middle of the luminescent area AA. This makes it impossible to effectively improve the thickness difference of the luminescent part 11 between the edge and the middle of the luminescent area AA, resulting in uneven brightness in the display panel. In this embodiment, by limiting the ratio of the thickness of the virtual light-emitting part 12 to the thickness of the light-emitting part 11 to between 2 and 9, not only can the risk of virtual light-emitting ink overflow be reduced, but the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area during the drying process can also be reduced. This reduces the thickness difference between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0053] In some embodiments, such as Figure 3 As shown, the flatness of the virtual light-emitting part 12 is less than that of the light-emitting part 11. It should be noted that in this embodiment, by increasing the solvent content in the virtual light-emitting ink, the concentration of the virtual light-emitting ink is lower than that of the light-emitting ink. This increases the saturated vapor pressure at the edge of the display area AA, thereby improving the flatness of the light-emitting part at the edge of the display area AA and reducing the thickness difference between the light-emitting part at the edge and the middle area of ​​the display area AA, thus improving the uniformity of the brightness of the display panel. Because the solute in the virtual light-emitting ink is less than that in the light-emitting ink, the solvent in the virtual light-emitting ink evaporates faster during the drying process, resulting in uneven distribution of solid particles in the ink. This leads to local particle accumulation or depressions, making the flatness of the virtual light-emitting part less than that of the light-emitting part.

[0054] In some embodiments, such as Figure 3 As shown, the display panel 100 further includes a substrate 5, a driving circuit layer 6, and an anode layer 2. The driving circuit layer 6 is disposed on one side of the substrate 5, and the anode layer 2 is disposed on the side of the driving circuit layer 6 away from the substrate 5. A first dam 3 and a second dam 4 are disposed on the side of the driving circuit layer 6 away from the substrate 5. The anode layer 2 includes a plurality of patterned anodes, which are respectively disposed in the display area AA and the virtual pixel area NA1. Each first opening H1 corresponds to one anode, and each second opening H2 corresponds to one anode.

[0055] In some embodiments, such as Figure 4 As shown, Figure 4 The second type of display panel provided for embodiments of this application is along Figure 2 The cross-sectional view along the A-A' direction shown has a structure similar to... Figure 1 The structures of the display panels shown are roughly the same, the difference being that the thickness of the virtual light-emitting part 12 near the display area AA is less than the thickness of the virtual light-emitting part far from the display area AA.

[0056] It should be noted that since the saturated vapor pressure in the center of the display area AA is greater than that at the edge of the display area AA, by increasing the volume of the virtual light-emitting ink far from the display area AA, more solvent is sprayed onto the virtual light-emitting ink far from the display area AA. This allows a higher saturated vapor pressure to be formed in the part of the virtual pixel area NA1 far from the display area AA. This higher saturated vapor pressure causes the solvent evaporated from the virtual pixel area NA1 to flow towards the display area AA, thereby increasing the saturated vapor pressure at the edge of the display area AA and making the edge of the display area AA have a relatively stable saturated vapor pressure consistent with that in the center of the display area AA. Therefore, the thickness difference between the light-emitting part at the edge of the display area and the light-emitting part in the center of the display area can be further reduced, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0057] In some embodiments, the thickness of the plurality of virtual light-emitting parts 12 gradually increases in the direction from the display area AA to the virtual pixel area NA1.

[0058] like Figure 4As shown, the virtual pixel area NA1 has virtual light-emitting parts 12 of varying thicknesses. The thickness of the multiple virtual light-emitting parts 12 gradually increases in the direction from the display area AA to the virtual pixel area NA1. The thickness of the virtual light-emitting parts 12 is related to the concentration of the virtual light-emitting ink. By gradually increasing the concentration of the light-emitting ink in the direction from the display area AA to the virtual pixel area NA1, a saturated vapor pressure that gradually increases from the side closer to the display area AA to the side farther away from the display area AA can be formed in the virtual pixel area NA1. This allows the solvent evaporating at the edge of the virtual pixel area NA1 to flow towards the edge of the display area AA, thereby increasing the saturated vapor pressure at the edge of the display area AA and making the saturated vapor pressure at the edge of the display area AA relatively stable and consistent with the saturated vapor pressure in the middle of the display area AA. Therefore, the thickness difference between the light-emitting parts at the edge of the display area and the light-emitting parts in the middle of the display area can be further reduced, thereby improving the brightness uniformity of the display panel and thus increasing the process yield of the display panel.

[0059] In some embodiments, such as Figure 4 As shown, the ratio of the thickness of the virtual light-emitting part 12 closest to the display area AA to the thickness of the light-emitting part 11 is greater than or equal to 0.2 and less than or equal to 0.4. For example, the ratio of the thickness of the virtual light-emitting part 12 closest to the display area AA to the thickness of the light-emitting part 11 can be 0.2, 0.25, 0.3, 0.35, or 0.4, etc.

[0060] It should be noted that if the thickness ratio of the virtual light-emitting part 12 to the light-emitting part 11 is too small, the volume of the sprayed virtual light-emitting ink needs to be reduced to make the thickness of the virtual light-emitting part 12 reach the required ratio. This will reduce the saturated vapor pressure at the edge of the light-emitting area AA, resulting in a significant difference between the drying effect at the edge of the light-emitting area AA and the drying effect in the middle of the light-emitting area AA. This makes it impossible to effectively improve the thickness difference of the light-emitting part 11 between the edge and the middle of the light-emitting area AA, resulting in uneven brightness of the displayed image on the display panel. In this embodiment, by limiting the thickness ratio of the virtual light-emitting part 12 closest to the display area AA to the thickness of the light-emitting part 11 to between 2 and 4, the difference between the saturated vapor pressure at the edge and the middle of the display area during the drying process can be reduced. This reduces the thickness difference between the light-emitting part at the edge and the light-emitting part in the middle of the display area, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0061] In some embodiments, such as Figure 4 As shown, the ratio of the thickness of the virtual light-emitting part 12 furthest from the display area AA to the thickness of the light-emitting part 11 is greater than or equal to 0.7 and less than or equal to 0.9. The ratio of the thickness of the virtual light-emitting part 12 furthest from the display area AA to the thickness of the light-emitting part 11 can be 0.7, 0.75, 0.8, 0.85, or 0.9, etc.

[0062] It should be noted that if the thickness ratio of the virtual light-emitting part 12 to the light-emitting part 11 is too large, the volume of the sprayed virtual light-emitting ink needs to be increased to make the thickness of the virtual light-emitting part 12 meet the required ratio. This will increase the risk of the virtual light-emitting ink overflowing from the second opening H2, leading to a decrease in the production yield of the display panel. In this embodiment, by limiting the thickness ratio of the virtual light-emitting part 12, which is furthest from the display area AA, to the thickness of the light-emitting part 11 to between 7 and 9, not only can the risk of virtual light-emitting ink overflow be reduced, but the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area during the drying process can also be reduced. This reduces the thickness difference between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area, thereby improving the brightness uniformity of the display panel and thus increasing the process yield of the display panel.

[0063] In some embodiments, the virtual pixel area NA1 includes at least two sub-virtual pixel areas, wherein one sub-virtual pixel area is located on the side of the other sub-virtual pixel area away from the display area AA. The thickness of the plurality of virtual light-emitting parts 12 within the same sub-virtual pixel area is equal, and the thickness of the virtual light-emitting parts 12 in the sub-virtual pixel area closer to the display area AA is less than the thickness of the virtual light-emitting parts 12 in the sub-virtual pixel area farther from the display area AA. By dividing the virtual pixel area NA1 into at least two sub-virtual pixel areas and making the thickness of the plurality of virtual light-emitting parts 12 in each sub-virtual pixel area the same, the difficulty of the inkjet printing process can be reduced. By making the thickness of the virtual light-emitting part 12 of the sub-virtual pixel area closer to the display area AA smaller than the thickness of the virtual light-emitting part 12 of the sub-virtual pixel area farther from the display area AA, virtual light-emitting ink with a gradient volume change can be formed in the multiple second openings H2 in the virtual pixel area NA1. In this way, a saturated vapor pressure that gradually increases from the side closer to the display area AA to the side farther away from the display area AA can be formed in the virtual pixel area NA1. This allows the solvent evaporated at the edge of the virtual pixel area NA1 to flow to the edge of the display area AA, thereby increasing the saturated vapor pressure at the edge of the display area AA and making the saturated vapor pressure at the edge of the display area AA relatively stable and consistent with the saturated vapor pressure in the middle of the display area AA. Therefore, the difference in thickness between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area can be further reduced, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0064] In some embodiments, such as Figure 4As shown, the virtual pixel area NA1 includes a first sub-virtual pixel area NA11, a second sub-virtual pixel area NA12, and a third sub-virtual pixel area NA13. The first sub-virtual pixel area NA11 is located around the display area AA, the second sub-virtual pixel area NA12 is located around the first sub-virtual pixel area NA12, and the third sub-virtual pixel area NA13 is located around the second sub-virtual pixel area NA12. The first sub-virtual pixel area NA11, the second sub-virtual pixel area NA12, and the third sub-virtual pixel area NA13 all include multiple virtual light-emitting parts 12. The thickness of the virtual light-emitting part 12 in the first sub-virtual pixel area NA11 is less than the thickness of the virtual light-emitting part 12 in the second sub-virtual pixel area NA12, the thickness of the virtual light-emitting part 12 in the second sub-virtual pixel area NA12 is less than the thickness of the virtual light-emitting part 12 in the third sub-virtual pixel area NA13, the ratio of the thickness of the virtual light-emitting part 12 in the first sub-virtual pixel area NA11 to the thickness of the light-emitting part 11 in the display area AA is between 2 and 4, the ratio of the thickness of the virtual light-emitting part 12 in the second sub-virtual pixel area NA12 to the thickness of the light-emitting part 11 in the display area AA is between 4 and 7, and the ratio of the thickness of the virtual light-emitting part 12 in the third sub-virtual pixel area NA13 to the thickness of the light-emitting part 11 in the display area AA is between 7 and 9.

[0065] In some other embodiments, the number of sub-virtual pixel areas in the virtual pixel area NA1 is not limited to the three in the above embodiments, but can also be two, four or more, and there is no limitation here.

[0066] It should be noted that, Figure 4 This illustration only shows the relationship between the thicknesses of the virtual light-emitting parts 12 in each sub-virtual pixel area and does not represent the actual range of each sub-pixel area or the number of second openings and virtual light-emitting parts 12 in each sub-pixel area.

[0067] In some embodiments, the flatness of the virtual light-emitting portion 12 closer to the display area AA is less than the flatness of the virtual light-emitting portion 12 farther from the display area AA. For example Figure 4 and Figure 5As shown, the flatness of the virtual light-emitting part 12 of the first sub-virtual light-emitting area NA11 is less than that of the virtual light-emitting part 12 of the third sub-virtual light-emitting area NA13. It should be noted that, since the volume of the virtual light-emitting ink in the second opening H2 near the display area AA is smaller than that in the second opening H2 far from the display area AA, under the same concentration, the solvent and solute content in the virtual light-emitting ink in the second opening H2 near the display area AA is less than that in the virtual light-emitting ink in the second opening H2 far from the display area AA. This allows a higher saturated vapor pressure to be formed in the portion of the virtual pixel area NA1 far from the display area AA. This higher saturated vapor pressure allows the solvent evaporated from the virtual pixel area NA1 to flow towards the display area AA, thereby increasing the saturated vapor pressure at the edge of the display area AA and making the edge of the display area AA have a relatively stable saturated vapor pressure consistent with that in the middle of the display area AA. Therefore, the thickness difference between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area can be further reduced, thereby improving the brightness uniformity of the display panel and thus increasing the process yield of the display panel. Because the solute in the virtual light-emitting ink in the second opening H2 near the display area AA is less than that in the virtual light-emitting ink in the second opening H2 far from the display area AA, the solvent in the virtual light-emitting ink near the display area AA evaporates faster during the drying process, resulting in uneven distribution of solid particles in the ink, leading to local particle accumulation or depressions. Consequently, the flatness of the virtual light-emitting part 12 near the display area AA is less than that of the virtual light-emitting part 12 far from the display area AA.

[0068] In some embodiments, the flatness of the plurality of virtual light-emitting parts 12 gradually increases in the direction from the display area AA to the virtual pixel area NA1.

[0069] like Figure 4 and Figure 5 As shown, the flatness of the virtual light-emitting portion 12 of the first sub-virtual light-emitting area NA11 is less than that of the virtual light-emitting portion 12 of the second sub-virtual light-emitting area NA12, and the flatness of the virtual light-emitting portion 12 of the second sub-virtual light-emitting area NA12 is less than that of the virtual light-emitting portion 12 of the third sub-virtual light-emitting area NA13. This allows the virtual light-emitting ink in the multiple second openings H2 within the virtual pixel area NA1 to have a gradient volume change. This creates a gradually increasing saturated vapor pressure in the virtual pixel area NA1 from the side closer to the display area AA to the side farther from the display area AA. This allows the solvent evaporating at the edge of the virtual pixel area NA1 to flow towards the edge of the display area AA, thereby increasing the saturated vapor pressure at the edge of the display area AA and making the saturated vapor pressure at the edge of the display area AA relatively stable and consistent with the saturated vapor pressure in the middle of the display area AA. Therefore, the thickness difference between the light-emitting portion at the edge of the display area and the light-emitting portion in the middle of the display area can be further reduced, thereby improving the brightness uniformity of the display panel and ultimately increasing the process yield of the display panel.

[0070] like Figure 5 As shown, Figure 5 The second type of display panel provided for embodiments of this application is along Figure 2 The cross-sectional view along the A-A' direction shown has a structure similar to... Figure 4 The display panels shown have roughly the same structure, the difference being that the height of the first dam 3 is less than the height of the second dam 4.

[0071] like Figure 5 As shown, both the first dam 3 and the second dam 4 are disposed on the driving circuit layer 6. The first height h1 of the first dam 3 is smaller than the second height h2 of the second dam 4, so that the volume of the first opening H1 is smaller than the volume of the second opening H2. By increasing the height of the second dam 4, the volume of the second opening H2 is increased, allowing the second opening H2 to accommodate more virtual light-emitting ink. This reduces the risk of virtual light-emitting ink overflow, thereby improving the process yield of the display panel.

[0072] Based on the display panel provided in the above embodiments of this application, embodiments of this application also provide a display device. Please refer to [link to relevant documentation]. Figure 6 , Figure 6 This is a schematic diagram of a display device provided in an embodiment of this application. The display device 1000 includes a display panel 100 and a housing 200, with the display panel 100 disposed on the housing 200. The display panel 100 can be any of the display panels provided in the above embodiments. The display device provided in the embodiments of this application can achieve the same technical effects as the display panels provided in any of the above embodiments, and will not be described in detail here.

[0073] The beneficial effects of the embodiments of this application are as follows: In the display panel of the embodiments of this application, by setting a virtual pixel area in the non-display area adjacent to the display area, and making the thickness of the virtual light-emitting part in the virtual pixel area smaller than the thickness of the light-emitting part in the display area, the difference between the saturated vapor pressure at the edge of the display area and the saturated vapor pressure in the middle of the display area during the drying process can be reduced. In this way, the difference in thickness between the light-emitting part at the edge of the display area and the light-emitting part in the middle of the display area can be reduced, thereby improving the brightness uniformity of the display panel and thus improving the process yield of the display panel.

[0074] In the description of this application, 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 features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area disposed around the periphery of the display area. The non-display area includes a virtual pixel area disposed adjacent to the display area. The display panel also includes: The light-emitting layer includes multiple light-emitting parts and multiple virtual light-emitting parts, wherein the light-emitting parts are disposed in the display area and the virtual light-emitting parts are disposed in the virtual pixel area; The thickness of the virtual light-emitting part is less than the thickness of the light-emitting part.

2. The display panel as described in claim 1, characterized in that, The thickness of the virtual light-emitting part closer to the display area is less than the thickness of the virtual light-emitting part farther away from the display area.

3. The display panel as described in claim 2, characterized in that, In the direction from the display area to the virtual pixel area, the thickness of the plurality of virtual light-emitting parts gradually increases.

4. The display panel as described in claim 2, characterized in that, The ratio of the thickness of the virtual light-emitting part closest to the display area to the thickness of the light-emitting part is greater than or equal to 0.2 and less than or equal to 0.4; and / or The ratio of the thickness of the virtual light-emitting part furthest from the display area to the thickness of the light-emitting part is greater than or equal to 0.7 and less than or equal to 0.

9.

5. The display panel as described in claim 2, characterized in that, The virtual pixel area includes at least two sub-virtual pixel areas, wherein one of the sub-virtual pixel areas is located on the side of the other sub-virtual pixel area away from the display area; In this sub-virtual pixel region, the thickness of the virtual light-emitting parts is equal; the thickness of the virtual light-emitting part in the sub-virtual pixel region closer to the display area is less than the thickness of the virtual light-emitting part in the sub-virtual pixel region farther from the display area.

6. The display panel as described in any one of claims 1 to 5, characterized in that, The flatness of the virtual light-emitting part is less than that of the light-emitting part.

7. The display panel as described in claim 6, characterized in that, The flatness of the virtual light-emitting part closer to the display area is less than that of the virtual light-emitting part farther away from the display area.

8. The display panel as described in claim 6, characterized in that, In the direction from the display area to the virtual pixel area, the flatness of the plurality of virtual light-emitting parts gradually increases.

9. The display panel as described in any one of claims 1 to 5, characterized in that, The display panel also includes: Multiple first dams are set in the display area to enclose and form multiple first openings, and the light-emitting part is set in the first opening; Multiple second dams are set in the virtual pixel area to enclose and form multiple second openings, and the virtual light-emitting part is set in the second opening; The height of the first dam is less than or equal to the height of the second dam.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

Images