Display panel and display apparatus

Abstract

A display panel and a display apparatus. The display panel has a first region, a second region and a third region, wherein the first region and the second region are arranged at the periphery of the third region; the first region, the second region and the third region are not overlapped and are spliced with each other; the third region has a first group of opposite side edges and a second group of opposite side edges, the length of opposite side edges in the first group is smaller than that of opposite side edges in the second group; and the second region is arranged at the outer side of the first group of opposite side edges, and the first region is arranged on the outer side of the second group of opposite side edges. The display panel comprises a plurality of sub-boards, which are respectively distributed in the first region, the second region and the third region, wherein each sub-board comprises a plurality of light-emitting units, the light emission area of the light-emitting units in the first region is smaller than the light emission area of the light-emitting units in the second region, and the light emission area of the light-emitting units in the second region is smaller than the light emission area of the light-emitting units in the third region.

Description

Display panel and display device Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and particularly relate to a display panel and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-luminescence, low power consumption, lightness, flexibility, brilliant colors, high contrast, and fast response rate. Summary of the Invention

[0003] In a first aspect, an embodiment of the present disclosure provides a display panel, comprising a first area, a second area, and a third area, wherein the first area and the second area surround the periphery of the third area, and the first area, the second area, and the third area do not overlap with each other and are spliced ​​together;

[0004] The third area has a first set of opposite sides and a second set of opposite sides, the length of the first set of opposite sides is shorter than the length of the second set of opposite sides; the second area is arranged outside the first set of opposite sides, and the first area is arranged outside the second set of opposite sides;

[0005] The display panel includes a plurality of sub-panels, and the plurality of sub-panels are respectively distributed in the first area, the second area and the third area;

[0006] Each of the sub-boards includes a plurality of light-emitting units;

[0007] The light emitting area of ​​the light emitting unit in the first zone is smaller than the light emitting area of ​​the light emitting unit in the second zone, and the light emitting area of ​​the light emitting unit in the second zone is smaller than the light emitting area of ​​the light emitting unit in the third zone.

[0008] In some embodiments, the method comprises a substrate and a pixel defining layer, wherein the pixel defining layer is located on one side of the substrate.

[0009] The light emitting unit includes a light emitting element;

[0010] A plurality of openings are formed in the pixel defining layer, and each of the light-emitting elements is located in a corresponding opening;

[0011] The orthographic projection area of ​​the opening in the first region on the substrate is smaller than the orthographic projection area of ​​the opening in the second region on the substrate, and the orthographic projection area of ​​the opening in the second region on the substrate is smaller than the orthographic projection area of ​​the opening in the third region on the substrate.

[0012] In some embodiments, the light-emitting unit further includes a color resistor located on a side of the light-emitting element away from the substrate, and the color resistors of at least some of the light-emitting units are different in color.

[0013] The orthographic projection of each color resist on the substrate at least partially overlaps with the orthographic projection of one light-emitting element on the substrate;

[0014] The orthographic projection area of ​​the color resist in the first region on the substrate is smaller than the orthographic projection area of ​​the color resist in the second region on the substrate, and the orthographic projection area of ​​the color resist in the second region on the substrate is smaller than the orthographic projection area of ​​the color resist in the third region on the substrate.

[0015] In some embodiments, the light emitting area of ​​the light emitting unit in the first zone is 94% to 95% of the light emitting area of ​​the light emitting unit in the third zone.

[0016] The light emitting area of ​​the light emitting unit in the second zone is 97% to 98% of the light emitting area of ​​the light emitting unit in the third zone.

[0017] In some embodiments, the light-emitting element includes a reflective anode layer, a light-emitting functional layer, and a cathode layer, wherein the reflective anode layer, the light-emitting functional layer, and the cathode layer are stacked in sequence away from the substrate;

[0018] The thickness of the reflective anode layer in the first region, the second region and the third region is equal.

[0019] In some embodiments, the reflective anode layer includes a reflective layer and a transparent electrode layer, and the reflective layer and the transparent electrode layer are sequentially stacked away from the substrate;

[0020] The thickness of the reflective layer in the first area, the second area and the third area is equal;

[0021] The thickness of the transparent electrode layer in the first area, the second area and the third area is equal.

[0022] In some embodiments, the reflective anode layer includes a reflective layer, a transparent spacer layer, and a transparent electrode layer, wherein the reflective layer, the transparent spacer layer, and the transparent electrode layer are sequentially stacked away from the substrate;

[0023] The thickness of the reflective layer in the first area, the second area and the third area is equal;

[0024] The thickness of the transparent electrode layer in the first area is smaller than the thickness of the transparent electrode layer in the second area, and the thickness of the transparent electrode layer in the second area is smaller than the thickness of the transparent electrode layer in the third area;

[0025] The thickness of the transparent cushioning layer in the first area is greater than the thickness of the transparent cushioning layer in the second area, and the thickness of the transparent cushioning layer in the second area is greater than the thickness of the transparent cushioning layer in the third area.

[0026] In some embodiments, the difference in thickness between the transparent spacer layer in the first region and the second region ranges from 30 to 50 angstroms;

[0027] The difference in thickness between the transparent cushioning layer in the first area and the third area is in the range of 70 to 90 angstroms.

[0028] In some embodiments, the reflective anode layer has a thickness ranging from 920 to 1100 angstroms.

[0029] In some embodiments, the material of the transparent electrode layer includes indium tin oxide;

[0030] The material of the transparent spacer layer includes polyimide.

[0031] In some embodiments, the thickness of the color resist in the first region is greater than the thickness of the color resist in the second region, and the thickness of the color resist in the second region is greater than the thickness of the color resist in the third region.

[0032] In some embodiments, the thickness of the color resist in the first region is 7% to 9% greater than the thickness of the color resist in the third region;

[0033] The thickness of the color resist in the second area is 3% to 5% greater than the thickness of the color resist in the third area.

[0034] In some embodiments, the color resists in the first area, the second area, and the third area all include red color resist, green color resist, blue color resist, and colorless color resist;

[0035] The colorless color resist in the first area and the second area is filled with color resist particles that absorb green light in a mass percentage range of 1% to 3%.

[0036] In some embodiments, the thickness of the red color resist in the first region and the second region is greater than the thickness of the green color resist, and the thickness of the green color resist is greater than the thickness of the blue color resist.

[0037] In some embodiments, the thickness of the color resist is in the range of 2 to 3 μm.

[0038] In some embodiments, the display panel is rectangular, and the first area, the second area, and the third area are all rectangular;

[0039] The two second regions disposed outside the first set of opposite sides have equal areas, and the two first regions disposed outside the second set of opposite sides have equal areas;

[0040] The long side of the first area, the wide side of the second area, and the long side of the third area are parallel to the long side of the display panel; the wide side of the first area, the long side of the second area, and the wide side of the third area are parallel to the wide side of the display panel;

[0041] The long side of each first region is equal to the long side of the display panel, and the wide side length of each first region is (the wide side length of the display panel - the wide side length of the third region) / 2;

[0042] The long side of each second area is equal to the wide side of the third area, and the length of the wide side of each second area is (the long side length of the display panel - the long side length of the third area) / 2.

[0043] In some embodiments, the width length of the first region is 20% to 30% of the width length of the display panel;

[0044] The width of the second area is 5% to 15% of the width of the long side of the display panel.

[0045] In some embodiments, the width length of the first region is 25% of the width length of the display panel;

[0046] The width of the second region is 12.5% ​​of the width of the long side of the display panel.

[0047] In a second aspect, an embodiment of the present disclosure further provides a display device, which includes the sub-panel of the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which:

[0049] Figure 1a is a graph showing the measured reflectivity data of different areas of a G8.5 generation large panel in the related art.

[0050] FIG1b is a graph showing the measured data of the transparent electrode layer thickness in different areas of the G8.5 generation large panel in the related art.

[0051] FIG1c is a schematic diagram showing the area division of a G8.5 generation large board in the related art.

[0052] FIG2 is a schematic top view of partitions of a display panel according to an embodiment of the present disclosure.

[0053] FIG3 a is a schematic top view of the area A in FIG2 .

[0054] FIG3 b is a schematic cross-sectional view of the area A in FIG2 .

[0055] FIG3 c is another cross-sectional schematic diagram of the area A in FIG2 .

[0056] FIG3c′ is another cross-sectional schematic diagram of the area A in FIG2 ;

[0057] FIG3 d is another cross-sectional schematic diagram of the area A in FIG2 .

[0058] FIG3e is another cross-sectional schematic diagram of the area A in FIG2 .

[0059] FIG3 f is a schematic cross-sectional view of the area A in FIG2 in the related art.

[0060] FIG3g is another cross-sectional schematic diagram of the area A in FIG2 . DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display panel and a display device provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0062] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully enable those skilled in the art to understand the scope of this disclosure.

[0063] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions shown in the drawings illustrate specific shapes of the regions, but are not intended to be limiting.

[0064] Referring to Figures 1a-1c in the related art, Figure 1a shows the measured reflectivity data for different regions of a G8.5-generation large panel; Figure 1b shows the measured transparent electrode layer thickness data for different regions of a G8.5-generation large panel; and Figure 1c shows a schematic diagram of the regional divisions of a G8.5-generation large panel in the related art. A G8.5-generation large panel (2200mm x 2500mm in width x length) includes multiple sub-display panels, each containing an OLED light-emitting unit. The OLED light-emitting unit is a sandwich structure consisting of a reflective anode, a light-emitting functional layer, and a cathode. The reflective anode is a stacked structure of a reflective layer and a transparent electrode layer, with the transparent electrode layer made of indium tin oxide (ITO).

[0065] Referring to Figures 1a and 1c, the reflectivity of the sub-display panels located in the peripheral area of ​​the large panel is higher, while the reflectivity of the sub-display panels located in the central area of ​​the large panel is lower. The reflectivity data in Figure 1a are all percentage data. For example, the overall reflectivity of the sub-display panels located in the third zone S3 in the middle of the large panel is relatively uniform, with the overall reflectivity of the sub-display panels in the third zone S3 being 55.2%. The overall reflectivity of the sub-display panels in the third zone S3 is 1.3% lower than that of the sub-display panels located in the second zone S2 around the large panel, and the overall reflectivity of the sub-display panels in the third zone S3 is 3.1% lower than that of the sub-display panels located in the first zone S1 around the large panel. This results in different display brightness of the sub-display panels in different areas of the large panel.

[0066] Referring to Figure 1b and Figure 1c, the thickness of the transparent electrode layer in the sub-display panel located in the middle area of ​​the large panel is larger, and the thickness of the transparent electrode layer in the sub-display panel located in the peripheral area of ​​the large panel is smaller. The unit of the thickness data of the transparent electrode layer in Figure 1b is angstrom For example, the overall thickness of the transparent electrode layer in the sub-display panel located in the third area S3 is relatively uniform, and the thickness of the transparent electrode layer in the third area S3 is The thickness of the transparent electrode layer in the third area S3 is greater than that in the second area S2. The thickness of the transparent electrode layer in the third area S3 is greater than that in the first area S1. Left and right; resulting in color point differences in the sub-display panels in different areas of the large panel.

[0067] Due to the influence of the overall reflectivity differences and transparent electrode layer thickness differences of the sub-display panels in different areas of the large panel (reflectivity difference: first area S1> second area S2> third area S3; transparent electrode layer thickness difference: first area S1<second area S2<third area S3), the display brightness and color points of the sub-display panels in different areas of the large panel vary. As a result, the sub-display panels located in the peripheral areas of the large panel (i.e., the first area S1 and the second area S2) appear brighter and greener. In addition, the efficiency stability of the sub-display panels on the entire large panel will fluctuate by about 5% due to the reflectivity differences between different areas of the large panel.

[0068] In the related art, it is necessary to adjust the display brightness differences and color point differences of the sub-display panels in different areas of the large panel to improve the brightness uniformity and color uniformity of the sub-display panels in different areas of the entire large panel.

[0069] In order to solve the problems of display brightness difference and color point difference and efficiency stability fluctuation of sub-display panels in different areas of the large panel in the related art, in the first aspect, the embodiment of the present disclosure provides a display panel, referring to Figure 2, which is a schematic top view of the partitions of the display panel in the embodiment of the present disclosure; Figure 3a is a schematic top view of the area A in Figure 2; wherein, there are a first area S1, a second area S2 and a third area S3, the first area S1 and the second area S2 surround the periphery of the third area S3, the first area S1, the second area S2 and the third area S3 do not overlap each other and are spliced ​​with each other; the third area S3 has a first group of phases The length of the first group of opposite sides is smaller than the length of the second group of opposite sides; the second area S2 is arranged outside the first group of opposite sides, and the first area S1 is arranged outside the second group of opposite sides; the display panel includes multiple sub-panels, and the multiple sub-panels are respectively distributed in the first area S1, the second area S2 and the third area S3; each sub-panel includes multiple light-emitting units 1; the light-emitting area of ​​the light-emitting unit 1 in the first area S1 is smaller than the light-emitting area of ​​the light-emitting unit 1 in the second area S2, and the light-emitting area of ​​the light-emitting unit 1 in the second area S2 is smaller than the light-emitting area of ​​the light-emitting unit 1 in the third area S3.

[0070] In this embodiment, by making the light-emitting area of ​​the light-emitting unit 1 in the first zone S1 smaller than the light-emitting area of ​​the light-emitting unit 1 in the second zone S2, and the light-emitting area of ​​the light-emitting unit 1 in the second zone S2 smaller than the light-emitting area of ​​the light-emitting unit 1 in the third zone S3, the display brightness difference between the sub-panels in the peripheral first zone S1 and second zone S2 and the middle third zone S3 can be reduced, so that the display brightness of the sub-panels in the peripheral first zone S1 and second zone S2 and the middle third zone S3 of the display panel tends to be consistent, thereby improving the brightness uniformity of the display panel, and at the same time improving the efficiency stability of the sub-panels in different areas of the display panel.

[0071] In some embodiments, referring to Figure 3b, which is a cross-sectional schematic diagram of the area A in Figure 2; wherein, the display panel includes a substrate 2 and a pixel defining layer 3, the pixel defining layer 3 is located on one side of the substrate 2, and the light-emitting unit 1 includes a light-emitting element 10; a plurality of openings 30 are provided in the pixel defining layer 3, and each light-emitting element 10 is correspondingly located in an opening 30; the orthographic projection area of ​​the opening 30 in the first zone S1 on the substrate 2 is smaller than the orthographic projection area of ​​the opening 30 in the second zone S2 on the substrate 2, and the orthographic projection area of ​​the opening 30 in the second zone S2 on the substrate 2 is smaller than the orthographic projection area of ​​the opening 30 in the third zone S3 on the substrate 2.

[0072] 3b , the light-emitting element 10 includes a reflective anode layer 101, a light-emitting functional layer 102, and a cathode layer 103. The reflective anode layer 101, the light-emitting functional layer 102, and the cathode layer 103 are stacked in this order away from the substrate 2. The contact area between the reflective anode layer 101, the light-emitting functional layer 102, and the cathode layer 103 is the effective light-emitting area of ​​the light-emitting element 10. In this embodiment, the sizes of the openings 30 in the pixel defining layer 3 for accommodating the light-emitting elements 10 in the first, second, and third regions S1, are different, i.e., the area of ​​the opening 30 in the first region S1 is less than the area of ​​the opening 30 in the second region S2, which is less than the area of ​​the opening 30 in the third region S3. Accordingly, the area of ​​the reflective anode layer 101 in the first region S1 is less than the area of ​​the reflective anode layer 101 in the second region S2, which is less than the area of ​​the reflective anode layer 101 in the third region S3. In other words, the effective light-emitting area of ​​the light-emitting element 10 in the first region S1 is less than the effective light-emitting area of ​​the light-emitting element 10 in the second region S2, which is less than the effective light-emitting area of ​​the light-emitting element 10 in the third region S3. As a result, the light-emitting area of ​​the light-emitting unit 1 in the first region S1 is less than the light-emitting area of ​​the light-emitting unit 1 in the second region S2, which is less than the light-emitting area of ​​the light-emitting unit 1 in the third region S3. This makes the display brightness of the sub-panels in the first and second regions S1, S2, and the middle third region S3 of the display panel tend to be consistent, thereby improving the brightness uniformity of the display panel.

[0073] In some embodiments, the thickness of the reflective anode layer 101 in the first, second, and third regions S1, S2, S3 are equal. In some embodiments, the thickness of the reflective anode layer 101 in the first region S1 is less than the thickness of the reflective anode layer 101 in the second region S2, and less than the thickness of the reflective anode layer 101 in the third region S3.

[0074] In some embodiments, referring to Figure 3c, another cross-sectional schematic diagram of the area A in Figure 2 is shown; wherein the light-emitting unit 1 further includes a color resist 11, which is located on the side of the light-emitting element 10 facing away from the substrate 2. The color of the color resist 11 of at least some of the light-emitting units 1 is different, and the orthographic projection of each color resist 11 on the substrate 2 at least partially overlaps with the orthographic projection of a light-emitting element 10 on the substrate 2; the orthographic projection area of ​​the color resist 11 on the substrate 2 in the first zone S1 is smaller than the orthographic projection area of ​​the color resist 11 on the substrate 2 in the second zone S2, and the orthographic projection area of ​​the color resist 11 on the substrate 2 in the second zone S2 is smaller than the orthographic projection area of ​​the color resist 11 on the substrate 2 in the third zone S3.

[0075] Among them, the increase in the area of ​​the color resist 11 allows light with a larger viewing angle emitted by the light-emitting element 10 to be emitted after passing through the color resist 11, thereby increasing the light-emitting area of ​​the light-emitting unit 1; by ensuring that the orthographic projection area of ​​the color resist 11 on the substrate 2 in the first zone S1 is less than the orthographic projection area of ​​the color resist 11 on the substrate 2 in the second zone S2 and less than the orthographic projection area of ​​the color resist 11 on the substrate 2 in the third zone S3, the light-emitting area of ​​the light-emitting unit 1 in the first zone S1 can be less than the light-emitting area of ​​the light-emitting unit 1 in the second zone S2 and less than the light-emitting area of ​​the light-emitting unit 1 in the third zone S3, thereby making the display brightness of the sub-panels in the first and second zones S1 and S2 around the display panel and in the middle third zone S3 tend to be consistent, thereby improving the brightness uniformity of the display panel.

[0076] In some embodiments, referring to FIG. 3 c , the area of ​​the opening 30 in the first zone S1 is less than the area of ​​the opening 30 in the second zone S2 and less than the area of ​​the opening 30 in the third zone S3 .

[0077] In some embodiments, referring to FIG. 3 c ′, which is another cross-sectional schematic diagram of the area A in FIG. 2 , based on the fact that the orthographic projection area of ​​the color resist 11 in the first zone S1 on the substrate 2 is less than the orthographic projection area of ​​the color resist 11 in the second zone S2 on the substrate 2 and less than the orthographic projection area of ​​the color resist 11 in the third zone S3 on the substrate 2, the area of ​​the opening 30 in the first zone S1, the area of ​​the opening 30 in the second zone S2, and the area of ​​the opening 30 in the third zone S3 are equal.

[0078] In some embodiments, the light-emitting area of ​​the light-emitting unit 1 in the first zone S1 is 94% to 95% of the light-emitting area of ​​the light-emitting unit 1 in the third zone S3, and the light-emitting area of ​​the light-emitting unit 1 in the second zone S2 is 97% to 98% of the light-emitting area of ​​the light-emitting unit 1 in the third zone S3. This configuration can reduce the display brightness of the sub-panels in the first and second zones S1 and S2 around the display panel, thereby making the display brightness of the sub-panels in the first and second zones S1 and S2 around the display panel and in the central third zone S3 more consistent, thereby improving the brightness uniformity of the display panel.

[0079] In some embodiments, referring to Figures 3d and 3e, Figure 3d is another cross-sectional schematic diagram of the area A in Figure 2; Figure 3e is another cross-sectional schematic diagram of the area A in Figure 2; wherein the thickness of the reflective anode layer 101 in the first area S1, the second area S2 and the third area S3 are equal.

[0080] In some embodiments, referring to Figure 3d, the reflective anode layer 101 includes a reflective layer 1011 and a transparent electrode layer 1012, which are stacked in sequence away from the substrate 2; the thickness of the reflective layer 1011 is equal in the first area S1, the second area S2 and the third area S3; the thickness of the transparent electrode layer 1012 is equal in the first area S1, the second area S2 and the third area S3.

[0081] In related art, the transparent electrode layer 1012 is formed by a sputtering process, and then the pattern of the transparent electrode layer 1012 is formed by an etching process. The material of the transparent electrode layer 1012 includes indium tin oxide (i.e., ITO). The sputtering process causes differences in the thickness of the transparent electrode layer 1012 in the first, second, and third regions S1, S2, and S3 of the display panel. For example, the thickness of the transparent electrode layer 1012 in the first region S1 is generally less than the thickness of the transparent electrode layer 1012 in the second region S2, and less than the thickness of the transparent electrode layer 1012 in the third region S3. The difference in thickness of the transparent electrode layer 1012 in different regions of the display panel can lead to differences in color points of the sub-panels in different regions of the display panel.

[0082] In this embodiment, a grayscale mask (Half-tone Mask) can be used to wet-etch and remove excess thickness of the transparent electrode layer 1012 in the second area S2 and the third area S3, thereby ensuring that the thickness of the transparent electrode layer 1012 in different areas of the display panel is consistent; since the thickness of the reflective layer 1011 in different areas of the display panel is consistent, the thickness of the reflective anode layer 101 in different areas of the display panel can be ensured to be consistent, thereby reducing the color point difference in different areas of the display panel, thereby improving the color uniformity of the display panel.

[0083] In some embodiments, referring to FIG. 3f, which is a cross-sectional schematic diagram of the area A in FIG. 2 in the related art; the thickness of the excess transparent electrode layer 1012 is removed along the dotted line in FIG. 3f, such as the thickness of the transparent electrode layer 1012 removed in the third area S3 is approximately The thickness of the transparent electrode layer 1012 removed in the second region S2 is approximately The thickness of the transparent electrode layer 1012 in the first area S1 remains the original thickness, thereby achieving the consistency of the thickness of the transparent electrode layer 1012 in the first area S1, the second area S2 and the third area S3 in FIG3 d.

[0084] In some embodiments, referring to Figure 3e, the reflective anode layer 101 includes a reflective layer 1011, a transparent spacer layer 1013 and a transparent electrode layer 1012, and the reflective layer 1011, the transparent spacer layer 1013 and the transparent electrode layer 1012 are stacked in sequence away from the substrate 2; the thickness of the reflective layer 1011 is equal in the first area S1, the second area S2 and the third area S3; the thickness of the transparent electrode layer 1012 in the first area S1 is less than the thickness of the transparent electrode layer 1012 in the second area S2, and the thickness of the transparent electrode layer 1012 in the second area S2 is less than the thickness of the transparent electrode layer 1012 in the third area S3; the thickness of the transparent spacer layer 1013 in the first area S1 is greater than the thickness of the transparent spacer layer 1013 in the second area S2, and the thickness of the transparent spacer layer 1013 in the second area S2 is greater than the thickness of the transparent spacer layer 1013 in the third area S3.

[0085] In this embodiment, by providing a transparent cushioning layer 1013, the thickness difference of the transparent electrode layer 1012 in the first area S1, the second area S2 and the third area S3 can be compensated. Since the thickness of the reflective layer 1011 in different areas of the display panel is consistent, the thickness of the reflective anode layer 101 in different areas of the display panel can be ensured to be consistent, thereby reducing the color point difference in different areas of the display panel, thereby improving the color uniformity of the display panel.

[0086] In some embodiments, referring to FIG. 3e , the difference in thickness between the transparent spacer layer 1013 in the first region S1 and the second region S2 ranges from 30 to 50 angstroms, and the difference in thickness between the transparent spacer layer 1013 in the first region S1 and the third region S3 ranges from 70 to 90 angstroms. This ensures that the thickness of the reflective anode layer 101 is consistent across the first region S1, the second region S2, and the third region S3.

[0087] In some embodiments, referring to FIG. 3 d and FIG. 3 e , the thickness of the reflective anode layer 101 ranges from 920 to 1100 angstroms.

[0088] In some embodiments, the transparent underlayer 1013 is made of polyimide (PI). The reflective layer 1011 is made of a metal or metal alloy such as copper, aluminum, silver, or gold. The reflective layer 1011 can reflect light irradiated by the light emitting element 10, thereby achieving top-emission light.

[0089] In some embodiments, referring to Figure 3g, which is another cross-sectional schematic diagram of the area A in Figure 2, the thickness of the color resist 11 in the first area S1 is greater than that in the second area S2, and the thickness of the color resist 11 in the second area S2 is greater than that in the third area S3. This arrangement can improve the greenish and brighter sub-panels in the first and second areas S1 and S2 around the display panel, and enhance the color and brightness uniformity of the sub-panels in different areas of the display panel.

[0090] In some embodiments, as shown in Figure 3g, the thickness of the color resist 11 in the first region S1 is 7% to 9% greater than that in the third region S3; and the thickness of the color resist 11 in the second region S2 is 3% to 5% greater than that in the third region S3. This arrangement can reduce the display brightness of the sub-panels in the first region S1 and the second region S2, thereby making the display brightness of the sub-panels in the first region S1, the second region S2, and the third region S3 more consistent.

[0091] In some embodiments, referring to FIG. 3g , the color resist 11 in the first, second, and third regions S1, S2, and S3 all include red, green, blue, and colorless color resists. The colorless color resists in the first and second regions S1 and S2 are filled with 1% to 3% by mass of green-light-absorbing color resist particles. The green-light-absorbing color resist particles absorb green light in the first and second regions S1 and S2, thereby improving the greenish tint of the sub-panels in the first and second regions S1 and S2 and enhancing color uniformity across the sub-panels in different regions of the display panel.

[0092] Among them, the first area S1, the second area S2, and the third area S3 all include red light-emitting elements, green light-emitting elements, blue light-emitting elements, and white light-emitting elements, and the light-emitting elements of different colors emit light of corresponding colors. The red color resist corresponds to the overlap with the orthographic projection of the red light-emitting element on the substrate 2, the green color resist corresponds to the overlap with the orthographic projection of the green light-emitting element on the substrate 2, the blue color resist corresponds to the overlap with the orthographic projection of the blue light-emitting element on the substrate 2, and the colorless color resist corresponds to the overlap with the orthographic projection of the white light-emitting element on the substrate 2. The colorless color resist can be made of a light-transmitting organic resin material, such as a flat layer material. In this embodiment, 2% by mass of color resist particles that absorb green light can be added to the colorless color resist in the first area S1 and the second area S2.

[0093] In some embodiments, the thickness of the red color resist in the first and second regions S1 and S2 is greater than that of the green color resist, and the thickness of the green color resist is greater than that of the blue color resist. This configuration can improve the phenomenon of sub-panels in the first and second regions S1 and S2 around the display panel displaying greenish or brighter colors, and improve the color uniformity and brightness uniformity of sub-panels in different regions of the display panel.

[0094] In some embodiments, the thickness of the color resist 11 ranges from 2 μm to 3 μm.

[0095] 3d, 3e, and 3g, the areas of the openings 30 in the first zone S1, the second zone S2, and the third zone S3 are equal. In some embodiments, the area of ​​the openings 30 in the first zone S1 is smaller than the area of ​​the openings 30 in the second zone S2 and smaller than the area of ​​the openings 30 in the third zone S3.

[0096] In some embodiments, the display panel further includes an encapsulation layer 4. Referring to Figures 3b, 3d, 3e and 3f, the encapsulation layer 4 is located on the side of the light-emitting element 10 away from the substrate 2; referring to Figures 3c and 3g, the encapsulation layer 4 is located between the color resist 11 and the light-emitting element 10; the encapsulation layer 4 is used to encapsulate the light-emitting element 10.

[0097] In some embodiments, referring to Figure 2, the display panel is rectangular, and the first area S1, the second area S2 and the third area S3 are all rectangular; the two second areas S2 arranged outside the first group of opposite side edges are equal in area, and the two first areas S1 arranged outside the second group of opposite side edges are equal in area; the long side of the first area S1, the wide side of the second area S2, and the long side of the third area S3 are parallel to the long side of the display panel, and the wide side of the first area S1, the long side of the second area S2, and the wide side of the third area S3 are parallel to the wide side of the display panel; the long side of each first area S1 is equal to the long side of the display panel, and the length of the wide side of each first area S1 is (the length of the wide side of the display panel - the length of the wide side of the third area S3) / 2; the long side of each second area S2 is equal to the wide side of the third area S3, and the length of the wide side of each second area S2 is (the length of the long side of the display panel - the length of the long side of the third area S3) / 2.

[0098] In some embodiments, referring to FIG. 2 , the width length of the first region S1 is 20% to 30% of the width length of the display panel; and the width length of the second region S2 is 5% to 15% of the width length of the long side of the display panel.

[0099] In some embodiments, referring to FIG2 , the width of the first area S1 is 25% of the width of the display panel; the width of the second area S2 is 12.5% ​​of the length of the long side of the display panel. For example, if the width of the display panel is 2200 mm and the long side of the display panel is 2500 mm, the width of the first area S1 is 550 mm, and the width of the second area S2 is 312.5 mm.

[0100] The display panel provided in the embodiment of the present disclosure can reduce the display brightness difference between the sub-panels in the peripheral first and second zones S1 and S2 and the middle third zone S3 by making the light-emitting area of ​​the light-emitting unit 1 in the first zone S1 smaller than the light-emitting area of ​​the light-emitting unit 1 in the second zone S2, and the light-emitting area of ​​the light-emitting unit 1 in the second zone S2 smaller than the light-emitting area of ​​the light-emitting unit 1 in the third zone S3, so that the display brightness of the sub-panels in the peripheral first and second zones S1 and S2 and the middle third zone S3 of the display panel tend to be consistent, thereby improving the brightness uniformity of the display panel and at the same time improving the efficiency stability of the sub-panels in different areas of the display panel.

[0101] In a second aspect, an embodiment of the present disclosure further provides a display device, comprising a sub-panel in the display panel in any of the above embodiments.

[0102] By adopting the sub-panel in the display panel in any of the above embodiments, the display effect of the display device is improved.

[0103] The display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as an OLED panel, an OLED TV, an OLED billboard, a display, a mobile phone, or a navigation system.

[0104] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display panel, wherein: It has a first area, a second area and a third area, wherein the first area and the second area surround the periphery of the third area, and the first area, the second area and the third area do not overlap with each other and are spliced ​​with each other; The third area has a first group of opposite sides and a second group of opposite sides, the length of the first group of opposite sides is less than the length of the second group of opposite sides; the second area is arranged outside the first group of opposite sides, and the first area is arranged outside the second group of opposite sides; The display panel includes a plurality of sub-panels, and the plurality of sub-panels are respectively distributed in the first area, the second area and the third area; Each of the sub-boards includes a plurality of light-emitting units; The light emitting area of ​​the light emitting unit in the first zone is smaller than the light emitting area of ​​the light emitting unit in the second zone, and the light emitting area of ​​the light emitting unit in the second zone is smaller than the light emitting area of ​​the light emitting unit in the third zone.

2. The display panel according to claim 1, wherein: It includes a substrate and a pixel defining layer, wherein the pixel defining layer is located on one side of the substrate. The light-emitting unit includes a light-emitting element; A plurality of openings are formed in the pixel defining layer, and each of the light emitting elements is correspondingly located in one of the openings; The orthographic projection area of ​​the opening in the first zone on the substrate is smaller than the orthographic projection area of ​​the opening in the second zone on the substrate, and the orthographic projection area of ​​the opening in the second zone on the substrate is smaller than the orthographic projection area of ​​the opening in the third zone on the substrate.

3. The display panel according to claim 2, wherein: The light-emitting unit further comprises a color resistor, which is located on a side of the light-emitting element away from the substrate, and the color resistors of at least some of the light-emitting units have different colors. The orthographic projection of each color resist on the substrate corresponds to at least partially overlapping with the orthographic projection of one light-emitting element on the substrate; The orthographic projection area of ​​the color resist in the first area on the substrate is smaller than the orthographic projection area of ​​the color resist in the second area on the substrate, and the orthographic projection area of ​​the color resist in the second area on the substrate is smaller than the orthographic projection area of ​​the color resist in the third area on the substrate.

4. The display panel according to any one of claims 1 to 3, wherein: The light emitting area of ​​the light emitting unit in the first zone is 94% to 95% of the light emitting area of ​​the light emitting unit in the third zone. The light emitting area of ​​the light emitting unit in the second zone is 97% to 98% of the light emitting area of ​​the light emitting unit in the third zone.

5. The display panel according to claim 3, wherein: The light emitting element comprises a reflective anode layer, a light emitting functional layer and a cathode layer, wherein the reflective anode layer, the light emitting functional layer and the cathode layer are stacked in sequence away from the substrate; The thickness of the reflective anode layer in the first region, the second region and the third region is equal.

6. The display panel according to claim 5, wherein: The reflective anode layer comprises a reflective layer and a transparent electrode layer, and the reflective layer and the transparent electrode layer are sequentially stacked away from the substrate; The thickness of the reflective layer in the first area, the second area and the third area is equal; The thickness of the transparent electrode layer in the first area, the second area and the third area is equal.

7. The display panel according to claim 5, wherein: The reflective anode layer comprises a reflective layer, a transparent cushioning layer and a transparent electrode layer, wherein the reflective layer, the transparent cushioning layer and the transparent electrode layer are stacked in sequence away from the substrate; The thickness of the reflective layer in the first area, the second area and the third area is equal; The thickness of the transparent electrode layer in the first area is smaller than the thickness of the transparent electrode layer in the second area, and the thickness of the transparent electrode layer in the second area is smaller than the thickness of the transparent electrode layer in the third area; The thickness of the transparent cushioning layer in the first area is greater than the thickness of the transparent cushioning layer in the second area, and the thickness of the transparent cushioning layer in the second area is greater than the thickness of the transparent cushioning layer in the third area.

8. The display panel according to claim 7, wherein: The difference in thickness between the transparent cushioning layer in the first area and the second area is in the range of 30 to 50 angstroms; The difference in thickness between the transparent cushioning layer in the first area and the third area is in the range of 70 to 90 angstroms.

9. The display panel according to any one of claims 5 to 8, wherein: The thickness of the reflective anode layer ranges from 920 to 1100 angstroms.

10. The display panel according to claim 7, wherein: The material of the transparent electrode layer includes indium tin oxide; The material of the transparent cushioning layer includes polyimide.

11. The display panel according to claim 3, wherein: The thickness of the color resist in the first area is greater than the thickness of the color resist in the second area, and the thickness of the color resist in the second area is greater than the thickness of the color resist in the third area.

12. The display panel according to claim 11, wherein: The thickness of the color resist in the first area is 7% to 9% higher than the thickness of the color resist in the third area; The thickness of the color resist in the second area is 3% to 5% greater than the thickness of the color resist in the third area.

13. The display panel according to claim 11 or 12, wherein: The color resists in the first area, the second area and the third area all include red color resists, green color resists, blue color resists and colorless color resists; The colorless color resist in the first area and the second area is filled with color resist particles that absorb green light in a mass percentage range of 1% to 3%.

14. The display panel according to claim 13, wherein: The thickness of the red color resist in the first area and the second area is greater than the thickness of the green color resist, and the thickness of the green color resist is greater than the thickness of the blue color resist.

15. The display panel according to claim 11, wherein: The thickness of the color resist is in the range of 2 to 3 μm.

16. The display panel according to claim 1, wherein: The display panel is rectangular, and the first area, the second area and the third area are all rectangular; The two second regions disposed outside the first group of opposite sides have equal areas, and the two first regions disposed outside the second group of opposite sides have equal areas; The long side of the first area, the wide side of the second area, the long side of the third area and the long side of the display panel are parallel, and the wide side of the first area, the long side of the second area, the wide side of the third area and the wide side of the display panel are parallel; The long side of each of the first regions is equal to the long side of the display panel, and the width length of each of the first regions is (width length of the display panel - width length of the third region) / 2; The long side of each second area is equal to the wide side of the third area, and the length of the wide side of each second area is (the length of the long side of the display panel-the length of the long side of the third area) / 2.

17. The display panel according to claim 16, wherein: The width length of the first area is 20% to 30% of the width length of the display panel; The width length of the second area is 5% to 15% of the width length of the long side of the display panel.

18. The display panel according to claim 17, wherein: The width length of the first area is 25% of the width length of the display panel; The length of the wide side of the second area is 12.5% ​​of the length of the long side of the display panel.

19. A display device, wherein: A sub-panel in a display panel comprising any one of claims 1-18.

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