Display panel and display device

Abstract

A display panel and a display device. The display panel comprises a base substrate, and a pixel circuit layer, an insulating layer, and a display function layer which are sequentially stacked on one side of the base substrate. A first through hole, a second through hole, and a third through hole in the insulating layer are arranged respectively corresponding to a first light-emitting element, a second light-emitting element, and a third light-emitting element of the display function layer, and the projections of center points of the first through hole, the second through hole, and the third through hole on the base substrate are a point A, a point B, and a point C respectively. The point A, the point B, and the point C are arranged in a first direction, the distance between the point A and the point B is a, the distance between the point B and the point C is b, and a is not equal to b; or the point A and the point B are located on a straight line parallel to the first direction, and the point C is located outside the straight line where the point A and the point B are located.

Description

Display panel and display device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on April 2, 2024, with application number 202410399118.X, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, for example, to a display panel and a display device. Background Art

[0003] In an organic light emitting diode (OLED) display panel, due to the array arrangement of pixel circuits, the locations of the through holes electrically connecting the pixel circuits to the anodes of the light-emitting elements typically employ an array through-hole design with equal spacing and located on the same horizontal line. However, this through-hole design can easily cause a loss in the aperture ratio of the light-emitting area of ​​the light-emitting element, leading to problems such as a shortened lifespan of the light-emitting element and a deterioration in color difference over the lifespan, thus affecting the display effect of the display panel. Summary of the Invention

[0004] The present application provides a display panel and a display device, which optimize the position of the through-holes connecting the sub-pixel anodes and adopt a non-uniformly spaced or non-linear through-hole array arrangement to avoid the loss of sub-pixel opening area caused by the through-holes, thereby improving the sub-pixel aperture ratio and lifespan, improving the color deviation caused by the lifespan of the light-emitting element, and improving the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0006] substrate;

[0007] A pixel circuit layer, an insulating layer and a display function layer are sequentially stacked on one side of the base substrate;

[0008] The pixel circuit layer includes a plurality of pixel circuits arranged in an array, the insulating layer includes a plurality of through holes, the through holes are filled with conductive structures, the display function layer includes a plurality of light-emitting elements, and the pixel circuits are electrically connected to the light-emitting elements through the conductive structures;

[0009] The display panel includes a plurality of pixel units, each pixel unit including a first light-emitting element, a second light-emitting element, and a third light-emitting element having different luminous colors. The through holes include a first through hole, a second through hole, and a third through hole. The first through hole, the second through hole, and the third through hole are respectively arranged corresponding to the first light-emitting element, the second light-emitting element, and the third light-emitting element. The projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate are points A, B, and C, respectively.

[0010] Among them, points A, B and C are arranged along a first direction, the distance between point A and point B is a, the distance between point B and point C is b, a≠b, and the first direction is parallel to the row direction or column direction of the array formed by the pixel circuits.

[0011] In a second aspect, an embodiment of the present application further provides a display panel, comprising: a base substrate;

[0012] A pixel circuit layer, an insulating layer and a display function layer are sequentially stacked on one side of the base substrate;

[0013] The pixel circuit layer includes a plurality of pixel circuits arranged in an array, the insulating layer includes a plurality of through holes, the through holes are filled with conductive structures, the display function layer includes a plurality of light-emitting elements, and the pixel circuits are electrically connected to the light-emitting elements through the conductive structures;

[0014] The display panel includes a plurality of pixel units, each pixel unit including a first light-emitting element, a second light-emitting element, and a third light-emitting element having different luminous colors. The through holes include a first through hole, a second through hole, and a third through hole. The first through hole, the second through hole, and the third through hole are respectively arranged corresponding to the first light-emitting element, the second light-emitting element, and the third light-emitting element. The projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate are points A, B, and C, respectively.

[0015] Among them, point A, point B and point C are arranged along a first direction, point A and point B are located on a straight line parallel to the first direction, point C is located outside the straight line where points A and B are located, and the first direction is parallel to the row direction or column direction of the array formed by the pixel circuits.

[0016] In a third aspect, an embodiment of the present application further provides a display device, which includes the display panel provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a display panel provided by an embodiment;

[0018] FIG2 is a schematic cross-sectional view along the EE' direction in FIG1;

[0019] FIG3 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0020] FIG4 is a schematic cross-sectional view along the FF′ direction in FIG3 ;

[0021] FIG5 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0022] FIG6 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0023] FIG7 is an enlarged schematic diagram of two adjacent pixel units in FIG6;

[0024] FIG8 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0025] FIG9 is a schematic cross-sectional view along the GG' direction in FIG8;

[0026] FIG10 is an enlarged schematic diagram of a single pixel unit in FIG8 ;

[0027] FIG11 is a schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The present application is described below in conjunction with the accompanying drawings and examples. The embodiments described herein are merely intended to explain the present application and are not intended to limit the present application. For ease of description, only portions, rather than all, of the structures relevant to the present application are shown in the accompanying drawings. Various modifications and variations can be made in the present application. Therefore, the present application is intended to cover modifications and variations of the present application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. The embodiments provided in the examples of the present application may be combined with each other unless there is any contradiction.

[0029] FIG1 is a schematic structural diagram of a display panel provided by one embodiment; FIG2 is a schematic cross-sectional diagram along the EE' direction in FIG1 . As shown in FIG1 and FIG2 , a display panel 100, especially in a wearable display panel product, generally adopts a real pixel arrangement, that is, one pixel unit 11 has three display sub-pixels, such as the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 shown in FIG1 ; multiple pixel units 11 are arranged in an array. For example, the first sub-pixel 111 is usually a green sub-pixel (G), the second sub-pixel 112 is a red sub-pixel (R), and the third sub-pixel 113 is a blue sub-pixel (Blue). Referring to Figure 2, the pixel circuit 12 of the display panel 100 includes a plurality of thin film transistors (TFTs) (only one thin film transistor is shown in the figure as an example), storage capacitors, metal wiring and other film layer structures. The TFT is electrically connected to the anode of the sub-pixel through the connecting through hole Via1, and is configured to provide a driving voltage to a single sub-pixel to drive the single sub-pixel to emit light, wherein the connecting through hole Via1 can refer to a connecting through hole that is directly in contact with the anode. Figure 2 shows that the TFT in the pixel circuit is electrically connected to the anode 113-A of the third sub-pixel 113 through the connecting through-hole Via1. The connecting through-holes Via1 in the pixel unit 11 are usually all on the same horizontal line (along the X direction as shown in Figure 1) and are often designed with equal spacing. As shown in Figures 1 and 2, the connecting through-holes Via1 corresponding to the first sub-pixel 111, the connecting through-holes Via1 corresponding to the second sub-pixel 112, and the connecting through-holes Via1 corresponding to the third sub-pixel 113 are arranged at equal intervals along the X direction in the figure, that is, L1=L2, and each spacing is 1 / 3 of the total width of the pixel unit 11 along the X direction.

[0030] However, the structural design of the connecting through holes Via1 arranged in an array with equal spacing and located on the same horizontal line requires a certain spacing between the connecting through holes Via1 and the sub-pixel light-emitting area under the requirement of ensuring the flatness of the display area. However, due to the limited space of the Real pixel arrangement array, the connecting through hole Via1 of the third sub-pixel 113 is located close to the anode 113-A, and the pixel opening in the pixel definition layer (PDL) 14 is reduced, resulting in a loss of opening area of ​​the light-emitting area of ​​the third sub-pixel 113, as shown in the Δ range in Figure 2. This will inevitably affect the lifespan of the third sub-pixel 113, resulting in a deterioration of the lifespan of the third sub-pixel 113. The attenuation of the lifespan of the third sub-pixel 113 will lead to color deviation, which will ultimately affect the display effect.

[0031] Based on the above technical issues, research has found that by optimizing the locations of the through-holes connecting the sub-pixel anodes and adopting a non-uniformly spaced or non-linear array arrangement of the through-holes, the loss of sub-pixel opening area caused by the through-holes can be avoided, thereby improving the sub-pixel aperture ratio and lifespan, and particularly achieving the goal of improving color shift. Based on this, research has proposed the technical solutions of the embodiments of this application. An embodiment of the present application provides a display panel, comprising a base substrate and a pixel circuit layer, an insulating layer, and a display function layer stacked in sequence on one side of the base substrate; the pixel circuit layer comprises a plurality of pixel circuits arranged in an array, the insulating layer comprises a plurality of through holes, the through holes being filled with a conductive structure, the display function layer comprises a plurality of light-emitting elements, and the pixel circuits are electrically connected to the light-emitting elements via the conductive structure; the display panel comprises a plurality of pixel units, the pixel units comprising a first light-emitting element, a second light-emitting element, and a third light-emitting element emitting different colors, the through holes comprising a first through hole, a second through hole, and a third through hole, the first through hole, the second through hole, and the third through hole being arranged corresponding to the first light-emitting element, the second light-emitting element, and the third light-emitting element, respectively, the projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate being points A, B, and C, respectively; wherein points A, B, and C are arranged along a first direction, the distance between points A and B is a, the distance between points B and C is b, a≠b, and the first direction is parallel to the row direction or column direction of the array formed by the pixel circuits.

[0032] By adopting the above technical solution, by optimizing the position of the through-holes connecting the sub-pixel anodes and adopting a non-uniformly spaced through-hole array arrangement, the loss of the sub-pixel opening area in the PDL due to the through-holes can be avoided, thereby improving the sub-pixel aperture ratio and extending the lifespan, especially achieving the purpose of improving color deviation, thereby improving the visual imaging effect of the display panel.

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] FIG3 is a schematic structural diagram of a display panel provided by an embodiment of the present application; FIG4 is a schematic cross-sectional diagram along the FF' direction in FIG3. In combination with FIG3 and FIG4, a display panel 200 provided by an embodiment of the present application includes a base substrate 21; a pixel circuit layer 22, an insulating layer 23 and a display function layer 24 stacked in sequence on one side of the base substrate 21; the pixel circuit layer 22 includes a plurality of pixel circuits 210 arranged in an array, the insulating layer 23 includes a plurality of through holes 230, the through holes 230 are filled with conductive structures 2301, the display function layer 24 includes a plurality of light-emitting elements 240, the pixel circuit 210 is electrically connected to the anode of the light-emitting element 240 through the conductive structure 2301, wherein the through hole 230 may refer to a connecting through hole that is directly in contact with the anode; the display panel 200 includes a plurality of pixel units 201, and the pixel unit 201 includes a first light-emitting element 210 having different luminous colors. The light-emitting element 241, the second light-emitting element 242 and the third light-emitting element 243, the through hole 230 includes a first through hole 231, a second through hole 232 and a third through hole 233, the first through hole 231, the second through hole 232 and the third through hole 233 are respectively arranged corresponding to the first light-emitting element 241, the second light-emitting element 242 and the third light-emitting element 243, and the projections of the center points of the first through hole 231, the second through hole 232 and the third through hole 233 on the base substrate 21 are point A, point B and point C respectively; wherein point A, point B and point C are arranged along the first direction X, the distance between point A and point B is a, the distance between point B and point C is b, a≠b, and the first direction X is parallel to the row direction or column direction of the array formed by the pixel circuit 210.

[0035] The display panel 200 may include an OLED display panel, an active-matrix organic light emitting diode (AMOLED) display panel, or the like. The present embodiment of the present application does not limit the type of the display panel 200. The base substrate 21 of the display panel may be a rigid material such as glass or silicon wafer, or a flexible material such as ultra-thin glass, metal foil, or polymer plastic material. The flexible or rigid base substrate 21 may block oxygen and moisture, preventing moisture or impurities from diffusing into the display panel through the base substrate 21.

[0036] As shown in Figures 3 and 4 , the display panel 200 includes a display area AA, which is configured to display a normal image. The display area AA includes multiple pixel units 201, each of which includes at least three light-emitting elements 240. For example, as shown in Figure 3 , the pixel unit 201 includes a first light-emitting element 241, a second light-emitting element 242, and a third light-emitting element 243. The first light-emitting element 241 may be a red sub-pixel (R), the second light-emitting element 242 may be a green sub-pixel (G), and the third light-emitting element 243 may be a blue sub-pixel (Blue). The display panel 200 further includes a pixel circuit layer 22 located on one side of the base substrate 21. The pixel circuit layer 22 includes a pixel circuit 210. The pixel circuit 210 can have a circuit structure such as 2T1C, 4T1C, 7T1C, 7T2C, 8T1C, or 8T2C. The pixel circuit 210 includes a film layer structure including multiple thin-film transistors 220, storage capacitors, and metal traces. The thin-film transistors 220 are electrically connected to the anode 240-A of the light-emitting element 240 via a through-hole 230. Optionally, the pixel circuits 210 corresponding to the first light-emitting element 241, the second light-emitting element 242, and the third light-emitting element 243 are arranged in a nearest-neighbor arrangement, and the pixel circuit layouts of the three are arranged in the same manner.

[0037] As shown in Figures 3 and 4 , taking the first through-holes 231, second through-holes 232, and third through-holes 233 corresponding to the first light-emitting element 241, the second light-emitting element 242, and the third light-emitting element 243 as an example, due to the limitation that the row direction or column direction of the array formed by the pixel circuit 210 is parallel, when the third through-hole 233 is close to the third light-emitting element 243, it occupies the opening area of ​​the light-emitting area in the pixel defining layer 25, affecting the aperture ratio of the light-emitting area of ​​the light-emitting element 240. Referring to Figure 3 , the embodiment of the present application breaks the regular arrangement of through-holes at equal spacing in the related art, and arranges the projection point A of the center point of the first through-hole 231 on the substrate 21, the projection point B of the center point of the second through-hole 232 on the substrate 21, and the projection point C of the center point of the third through-hole 233 on the substrate 21 along the X direction in the figure. In order to prevent the third through-hole 233 from blocking the third light-emitting element 243, the position of the through-hole 230 is appropriately moved so that the center point of the first through-hole 231 is at the projection point C of the substrate 21. The distance a between the projection point A and the projection point B of the center point of the second through hole 232 on the substrate 21 is not equal to the distance b between the projection point B of the center point of the second through hole 232 on the substrate 21 and the projection point C of the center point of the third through hole 233 on the substrate 21, that is, a≠b, which breaks the equal-pitch arrangement pattern of the through holes 230, reduces the shielding of the third through hole 233 on the third light-emitting element 243, improves the aperture ratio of the light-emitting area of ​​the light-emitting element 240, increases the light-emitting area of ​​the light-emitting element, and thus improves the service life.

[0038] Among them, Figures 3 and 4 only take the third through hole 233 affecting the aperture ratio and lifespan of the light-emitting area of ​​the third light-emitting element 243 as an example. In some optional embodiments, the third through hole 233 can be moved toward the second through hole 232 along the X direction in the figure; in other optional embodiments, when the first through hole 231 and / or the second through hole 232 affect the aperture ratio and lifespan of the light-emitting area of ​​the corresponding light-emitting element 240, the position of the through hole can also be moved to avoid the equal spacing design of the through holes, thereby improving the aperture ratio and lifespan of the light-emitting area of ​​the light-emitting element 240. The embodiments of this application will no longer be shown one by one.

[0039] The display panel 200 provided in this embodiment also includes other film layers, such as a pixel defining layer 25, an organic material layer of a light-emitting element, a cathode, a thin film encapsulation layer, etc., which work together to realize the display function of the display device, which will not be described one by one here.

[0040] In summary, the display panel provided in the embodiment of the present application optimizes the position of the through hole connecting the anode of the light-emitting element in the pixel unit and adopts a non-uniformly spaced through hole array arrangement to reduce the loss of the through hole to the opening area of ​​the light-emitting area of ​​the light-emitting element, thereby improving the sub-pixel aperture ratio and lifespan, achieving the purpose of improving the sub-pixel color deviation and improving the display effect of the display panel.

[0041] On the basis of the above embodiment, referring to FIG3 , the first light emitting elements 241 and the second light emitting elements 242 are alternately arranged along the second direction Y, the plurality of third light emitting elements 243 are arranged along the second direction Y, the first light emitting elements 241 and the third light emitting elements 243 are alternately arranged along the first direction X, the second light emitting elements 242 and the third light emitting elements 243 are alternately arranged along the first direction X, and the second direction Y intersects the first direction X.

[0042] Continuing with FIG3 , the arrangement of the pixel units 201 in the display panel 200 adopts a Real pixel arrangement, where multiple pixel units 201 are arranged in an array. This arrangement is conducive to achieving a small-size display with high-definition resolution on the display panel, meeting the application requirements of wearable products.

[0043] Optional, a>b.

[0044] 3 and 4 , the third through hole 233 can be moved toward the second through hole 232 along the X direction in the figure, so that the distance a between the projections A and B of the center points of the first through hole 231 and the second through hole 232 on the base substrate 21 is greater than the distance b between the projections B and C of the center points of the second through hole 232 and the third through hole 233 on the base substrate 21, thereby reducing the proportion of the third through hole 233 in the light-emitting area of ​​the third light-emitting element 243, that is, the Δ' area in FIG3 is smaller than the Δ area in FIG1, which is beneficial to increase the aperture ratio and the light-emitting area of ​​the light-emitting area of ​​the third light-emitting element 243.

[0045] In some optional embodiments, when the position adjustment of the third through hole 233 is small, the position adjustment of the through hole can be achieved only by moving the position of the third through hole 233 in the insulating layer 23, thereby reducing the proportion of the third through hole 233 in the light-emitting area of ​​the third light-emitting element 243; in some optional embodiments, when the position adjustment of the third through hole 233 is large, the area of ​​the source / drain electrode of the thin film transistor 220 can also be increased to ensure the electrical connection between the source / drain electrode and the conductive structure 2301 in the third through hole 233. This structural adjustment method can reduce the proportion of the third through hole 233 in the light-emitting area of ​​the third light-emitting element 243 without excessively adjusting the underlying pixel circuit arrangement, which is beneficial to increasing the aperture ratio and light-emitting area of ​​the light-emitting area of ​​the third light-emitting element 243, thereby increasing the life of the third light-emitting element 243 and further improving color deviation.

[0046] Based on the above embodiment, referring to FIG3 , the first light-emitting element 241 is a red light-emitting element R or a green light-emitting element G, the second light-emitting element 242 is the other of the red light-emitting element R and the green light-emitting element G, and the third light-emitting element 243 is a blue light-emitting element Blue.

[0047] 3 , the following description will be made by taking the first light emitting element 241 as a red light emitting element R, the second light emitting element 242 as a green light emitting element G, and the third light emitting element 243 as a blue light emitting element Blue as an example.

[0048] Comparing Figures 3-4 of the present embodiment with Figures 1-2, as an example, tests have shown that, as shown in Table 1, the aperture loss of the blue sub-pixel (Blue) along the X direction is reduced to Δ' = 2.75 μm, compared to Δ = 3.85 μm in the related art solution. This results in an estimated increase in the aperture ratio of the entire blue sub-pixel (Blue) by approximately 0.5%, an estimated increase in the lifetime of the blue sub-pixel (Blue) by 8%, and an estimated decrease in color shift by 15%. This indicates that the non-uniformly spaced through-hole array arrangement provided in the present embodiment can improve the lifetime and color shift of the blue sub-pixel (Blue). In Table 1, W represents the white light lifetime.

[0049] Table 1

[0050] The numerical values ​​in Table 1 represent the lifespan. A larger numerical value indicates a longer lifespan of the light-emitting element and a better light-emitting performance.

[0051] Based on the above embodiment, referring to FIG. 3 , along the first direction X, at least part of the light emitting area of ​​the first light emitting element 241 and at least part of the light emitting area of ​​the second light emitting element 242 overlap with the light emitting area of ​​the third light emitting element 243 .

[0052] 3 , within a single pixel unit 201, along the X direction, the third light-emitting element 243 overlaps with the first light-emitting element 241 and the second light-emitting element 242; along the Y direction, the first light-emitting element 241 and the second light-emitting element 242 overlap, and the third light-emitting element 243 extends along the Y direction. The three light-emitting elements 240 within a single pixel unit 201 are arranged in a compact structure, which is beneficial to improving the luminous brightness of the mixed light of the single pixel unit 201 and improving the pixel resolution of the display panel 200.

[0053] FIG5 is a schematic diagram of the structure of another display panel provided by an embodiment of the present application. Based on the above embodiment, referring to FIG3 and FIG5 , point A, point B, and point C are located on the same straight line parallel to the first direction X.

[0054] Continuing to refer to Figures 3, 4 and 5, according to the array arrangement rules of the pixel circuit in the row and column directions, the center point of the first through hole 231 is projected on the base substrate 21 at point A, the center point of the second through hole 232 is projected on the base substrate 21 at point B, and the center point of the third through hole 233 is projected on the base substrate 21 at point C, which are located on the same straight line parallel to the X direction.

[0055] Continuing to refer to Figures 3, 4 and 5, the distance between the two corresponding points A in two adjacent pixel units 201 along the first direction X is p1, the distance between the corresponding point C in the first pixel unit 201 and the corresponding point A in the second pixel unit 201 is c, a≠b≠c, and a+b+c=p1.

[0056] According to the array arrangement rules of the pixel circuit in the row and column directions, the center point of the first through hole 231 is projected on the substrate 21 at point A, the center point of the second through hole 232 is projected on the substrate 21 at point B, and the center point of the third through hole 233 is projected on the substrate 21 at point C. They are located on the same straight line parallel to the X direction. The distance between the through hole 230 corresponding to the pixel unit 201 and the through hole 230 of the adjacent pixel unit 201 satisfies the relationship a+b+c=p1. In this way, the reduction in the aperture ratio of the light-emitting area of ​​the light-emitting element 240 caused by the through hole 230 can be improved. At the same time, the "linear" through hole array arrangement can also reduce the difficulty of the manufacturing process of the display panel 200 and reduce the production cost.

[0057] The arrangement of the third light emitting elements 243 in FIG. 5 is different from the arrangement of the third light emitting elements 243 in FIG. 3 .

[0058] On the basis of the above embodiment, with continued reference to FIG3 , a, b, and c satisfy at least one of the following conditions: a=1 / 3p1; b<1 / 3p1; c>1 / 3p1.

[0059] By rationally planning the positional relationship among the first through hole 231, the second through hole 232, and the third through hole 233, an optional implementation manner is as follows: a=1 / 3p1; b<1 / 3p1; c>1 / 3p1. This arrangement can compress the distance between the third through hole 233 and the second through hole 232, and reduce the proportion of the third through hole 233 to the light-emitting area of ​​the third light-emitting element 243, thereby increasing the aperture ratio of the light-emitting area of ​​the third light-emitting element 243 and its light-emitting area.

[0060] Figure 6 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application; Figure 7 is an enlarged schematic diagram of two adjacent pixel units in Figure 6. Based on the above embodiment, and referring to Figures 6 and 7, points A and B are located on a straight line parallel to a first direction X, point C is located outside the straight line containing points A and B, and the perpendicular projection of point C on the straight line containing points A and B is point D. Points A and B are located on a straight line parallel to the first direction X, and point C is located outside the straight line containing points A and B.

[0061] 6 and 7 , FIG6 provides another arrangement of the pixel unit 201. Taking the second light-emitting element 242 as a green light-emitting element G, the first light-emitting element 241 as a red light-emitting element R, and the third light-emitting element 243 as a blue light-emitting element Blue as an example, according to the row and column array arrangement rules of the pixel circuit, the center point of the first through hole 231 is projected at point A on the base substrate 21, and the center point of the second through hole 232 is projected at point B on the base substrate 21, which are located on the same straight line parallel to the X direction. The center point of the third through hole 233 is projected at point C on the base substrate 21, which is located outside the straight line. The three through holes 230 of the R / G / Blue light-emitting elements in the same pixel unit 201 are not on the same horizontal line. Along the Y direction, the two connected blue light-emitting elements Blue are offset.

[0062] 6 and 7 , the distance between two corresponding points A in two adjacent pixel units 201 along the first direction X is p2, the distance between point B and point D in the first pixel unit 201 is b1, and the distance between point D and the corresponding point A in the second pixel unit 201 is c1, a≠b1≠c1, and a+b1+c1=p2.

[0063] 6 and 7 , along the X direction, the distance between the through hole 230 corresponding to the pixel unit 201 and the through hole 230 of the adjacent pixel unit 201 satisfies the relationship a+b1+c1=p2. By shifting the relative position of the third through hole 233 and the third light-emitting element 243, the aperture ratio and the light-emitting area of ​​the light-emitting region of the third light-emitting element 243 are improved, thereby improving the situation in which the aperture ratio of the light-emitting region of the light-emitting element 240 is reduced due to the through hole.

[0064] Optionally, continuing to refer to Figures 6 and 7, the positional relationship between the first through hole 231, the second through hole 232 and the third through hole 233 is reasonably planned so that a, b1, and c1 satisfy at least one of the following conditions: a=1 / 3p2; b1<1 / 3p2; c1>1 / 3p2. In this way, the distance between the third through hole 233 and the second through hole 232 along the X direction can be compressed, and the proportion of the third through hole 233 to the light-emitting area of ​​the third light-emitting element 243 can be reduced, which is beneficial to the staggered arrangement of the third light-emitting elements 243 in two adjacent pixel units 201, thereby improving the aperture ratio of the light-emitting area of ​​the third light-emitting element 243.

[0065] In some optional embodiments, as shown in Figures 6 and 7 , the distance d1 between point C and point D is less than 10 μm to prevent the through hole from affecting the aperture ratio of the light-emitting element in the adjacent pixel unit.

[0066] Continuing with Figures 6 and 7 , assuming that the second light-emitting element 242 is a green light-emitting element G, the first light-emitting element 241 is a red light-emitting element R, and the third light-emitting element 243 is a blue light-emitting element Blue, and comparing Figure 6 of the embodiment of the present application with Figures 1 and 2 as an example, it was found through testing, as shown in Table 2, that the lifespan of the blue sub-pixel (Blue) is expected to be improved by 11% and the color shift is expected to be improved by 21% compared to the related art solutions. Therefore, it can be seen that the non-linear array arrangement of the through holes 230 provided in the embodiment of the present application can minimize the opening loss of the blue sub-pixel (Blue), thereby improving the lifespan and color shift of the blue sub-pixel (Blue). Wherein, W in Table 2 is the white light lifetime.

[0067] Table 2

[0068] Among them, the numerical values ​​in Table 2 represent the lifespan. The larger the numerical value, the longer the lifespan of the light-emitting element and the better the light-emitting performance.

[0069] In the embodiment of the present application, the pixel arrangement in the display panel 200 is not limited to the Real pixel arrangement, but can also be other pixel arrangements. When the light-emitting area opening of the sub-pixel is lost due to the through hole 230 in the pixel circuit 210, the position of the through hole can be adjusted in a non-uniform spacing manner provided in the above embodiment to improve the situation where the area of ​​the light-emitting area opening of the sub-pixel is lost due to the occupation of the through hole, so as to achieve the purpose of increasing the life of the sub-pixel and improving color deviation, which will not be repeated here. Depending on the different pixel arrangements in the display panel 200, the virtual shape formed by the display area may be different. For example, the virtual shape formed by the display area may be a quadrilateral, a polygon or a circle, etc. The embodiment of the present application is not limited to this.

[0070] Based on the same concept, the embodiment of the present application also provides another display panel, which adjusts the position of the through-hole connecting the sub-pixel anode and adopts a non-uniformly spaced or non-linear through-hole array arrangement to avoid the loss of sub-pixel opening area in the PDL due to the through-hole, thereby improving the sub-pixel aperture ratio and lifespan, especially achieving the purpose of improving color deviation.

[0071] FIG8 is a schematic structural diagram of another display panel provided by an embodiment of the present application; FIG9 is a schematic cross-sectional diagram along the GG' direction in FIG8. An optional embodiment, referring to FIG8 and FIG9, another display panel 300 provided by an embodiment of the present application includes a base substrate 31 and a pixel circuit layer 32, an insulating layer 33 and a display function layer 34 stacked in sequence on one side of the base substrate 31; the pixel circuit layer 32 includes a plurality of pixel circuits 310 arranged in an array, the insulating layer 33 includes a plurality of through holes 330, the through holes 330 are filled with conductive structures 3301, the display function layer 34 includes a plurality of light-emitting elements 340, the pixel circuit 310 is electrically connected to the light-emitting element 340 through the conductive structure 3301, wherein the through hole 330 may refer to a connecting through hole that is directly in contact with the anode; the display panel 300 includes a plurality of pixel units 301, and the pixel unit 301 includes a first pixel unit 301 having different luminous colors. The light-emitting element 341, the second light-emitting element 342 and the third light-emitting element 343, the through hole 330 includes a first through hole 331, a second through hole 332 and a third through hole 333, the first through hole 331, the second through hole 332 and the third through hole 333 are respectively arranged corresponding to the first light-emitting element 341, the second light-emitting element 342 and the third light-emitting element 343, and the projections of the center points of the first through hole 331, the second through hole 332 and the third through hole 333 on the substrate 31 are point A, point B and point C respectively; wherein point A, point B and point C are arranged along a first direction X, point A and point B are located on a straight line parallel to the first direction X, and point C is located outside the straight line where points A and B are located, and the first direction X is parallel to the row direction or column direction of the array formed by the pixel circuit 310.

[0072] The display panel 300 includes an OLED display panel, an AMOLED display panel, etc., and the present embodiment does not limit the type of display panel 300. The base substrate 31 of the display panel 300 can be a rigid material such as glass or silicon wafer, or a flexible material such as ultra-thin glass, metal foil, or polymer plastic material. The flexible or rigid base substrate 31 can block oxygen and moisture, preventing moisture or impurities from diffusing into the display panel 300 through the base substrate 31.

[0073] 8 and 9, the display panel 300 includes a display area AA, which is set to display a normal picture. The display panel 300 includes a plurality of pixel units 301. Three light-emitting elements 340 are set in one pixel unit 301, such as the first light-emitting element 341, the second light-emitting element 342 and the third light-emitting element 343 shown in FIG8. For example, the first light-emitting element 341 is a red sub-pixel (R), the second light-emitting element 342 is a green sub-pixel (G), and the third light-emitting element 343 is a blue sub-pixel (Blue). The display panel 300 also includes a plurality of pixel units 301. Three light-emitting elements 340 are set in one pixel unit 301, such as the first light-emitting element 341, the second light-emitting element 342 and the third light-emitting element 343 shown in FIG8. For example, the first light-emitting element 341 is a red sub-pixel (R), the second light-emitting element 342 is a green sub-pixel (G), and the third light-emitting element 343 is a blue sub-pixel (Blue). The pixel circuit layer 32 is located on one side of the base substrate 31. The pixel circuit layer 32 includes a pixel circuit 310. The pixel circuit 310 can be a circuit structure of 2T1C, 4T1C, 7T1C, 7T2C, 8T1C, 8T2C, etc. The pixel circuit 310 includes a film layer structure such as multiple thin film transistors 320, storage capacitors and metal wiring. The thin film transistor 320 is electrically connected to the anode 340-A of the light-emitting element 340 through the through hole 330. The pixel circuit layer 32 is configured to provide a driving voltage to the light-emitting element 340 to drive the light-emitting element 340 to emit light.

[0074] 8 and 9 , taking the first through hole 331, the second through hole 332 and the third through hole 333 corresponding to the first light-emitting element 341, the second light-emitting element 342 and the third light-emitting element 343 as an example, due to the limitation that the row direction or the column direction of the array formed by the pixel circuit is parallel, when the third through hole 333 is close to the third light-emitting element 343, it occupies an opening area that affects the light-emitting area in the pixel defining layer 35, thereby affecting the aperture ratio of the light-emitting area of ​​the light-emitting element 340. 8 , the embodiment of the present application breaks the regular pattern of equally spaced through-holes in the related art and moves the position of the through-hole 330 so that the center point of the first through-hole 331 is projected at point A on the base substrate 31 and the center point of the second through-hole 332 is projected at point B on the base substrate 31 on a straight line parallel to the X direction. The center point of the third through-hole 333 is projected at point C on the base substrate 31 outside the straight line where points A and B are located. The third through-hole 333 is staggered with the first through-hole 331 and the second through-hole 332, which helps to reduce the proportion of the third through-hole 333 to the light-emitting area of ​​the third light-emitting element 343, thereby improving the aperture ratio and lifespan of the light-emitting area of ​​the light-emitting element 340.

[0075] Among them, Figures 8 and 9 only take the third through hole 333 affecting the aperture ratio and lifespan of the light-emitting area of ​​the third light-emitting element 343 as an example. In some optional embodiments, the third through hole 333 can be moved along the Y direction in the figure; in other optional embodiments, when the first through hole 331 and / or the second through hole 332 affect the aperture ratio and lifespan of the light-emitting area of ​​the corresponding light-emitting element 340, the position of the through hole can also be moved to avoid the equal spacing design of the through holes, thereby improving the aperture ratio and lifespan of the light-emitting area of ​​the light-emitting element 340. The embodiments of this application will no longer show them one by one.

[0076] The display panel 300 provided in this embodiment also includes other film layers, such as a pixel defining layer 35, an organic layer of the light-emitting element 340, a cathode, a thin film encapsulation layer, etc., which work together to realize the display function of the display device, which will not be described one by one here.

[0077] In summary, the display panel provided in the embodiment of the present application adjusts the position of the through hole connecting the anode of the light-emitting element in the pixel unit and adopts a non-linear through hole array arrangement to reduce the loss of the through hole to the opening area of ​​the light-emitting area of ​​the light-emitting element, thereby improving the sub-pixel aperture ratio and lifespan, achieving the purpose of improving the sub-pixel color deviation, and ultimately improving the display effect of the display panel.

[0078] On the basis of the above embodiment, with continued reference to FIG8 , in the same pixel unit 301 , the center line connecting the first light-emitting element 341 , the second light-emitting element 342 , and the third light-emitting element 343 forms a triangle; in multiple pixel units 301 , the first light-emitting element 341 , the second light-emitting element 342 , and the third light-emitting element 343 are alternately arranged along the first direction X, and the multiple first light-emitting elements 341 , the multiple second light-emitting elements 342 , and the multiple third light-emitting elements 343 are all arranged along the second direction Y, which intersects the first direction X.

[0079] Continuing with reference to FIG8 , the arrangement of the pixel units 301 in the display panel 300 adopts a real pyramid (Real Pyramid) pixel arrangement, and multiple pixel units 301 are arranged in an array. With this arrangement, the three light-emitting elements 340 in a single pixel unit 301 are compact, which is beneficial to improving the luminous brightness of the pixel unit 301, realizing a small-size display with high-definition resolution of the display panel, and meeting the application requirements of wearable products.

[0080] An optional implementation, continuing with reference to Figures 8 and 9, the vertical projection of point C on the straight line where points A and B are located is point D; the distance between point A and point B is a1, the distance between point D and point B is b1, and a1=b1.

[0081] 8, at least one of the three points A, B, and C is not collinear. Along the X direction in the figure, the distance a between the center points of the first through hole 331 and the second through hole 332 is 1， The same as the distance b1 between the center points of the second through hole 332 and the third through hole 333 .

[0082] In some optional embodiments, optionally, along the Y direction in the figure, the distance d2 between point C and point D is less than 12 μm to prevent the through hole from affecting the aperture ratio of the light-emitting element in the adjacent pixel unit.

[0083] Fig. 10 is an enlarged schematic diagram of a single pixel unit in Fig. 8. In an optional embodiment, still referring to Fig. 10 , the distance between point A and point B is a2, the distance between point B and point C is b2, and a2=b2.

[0084] 8 , at least one of points A, B, and C is not collinear, and the distance a2 between the center points of the first through hole 331 and the second through hole 332 is the same as the distance b2 between the center points of the second through hole 332 and the third through hole 333.

[0085] In summary, by optimizing the through-hole layout for the Real Pyramid pixel arrangement, and by setting the through-holes corresponding to the blue light-emitting element (Blue) in a staggered manner and in a non-uniformly spaced or non-straight manner, the opening loss of the blue light-emitting element can be effectively avoided, and the aperture ratio of the blue light-emitting element can be improved, thereby improving the lifespan and lifespan color difference of the blue light-emitting element.

[0086] A display panel provided in an embodiment of the present application includes a base substrate and a pixel circuit layer, an insulating layer, and a display function layer stacked in sequence on one side of the base substrate; a first through hole, a second through hole, and a third through hole of the insulating layer are respectively arranged corresponding to a first light-emitting element, a second light-emitting element, and a third light-emitting element of the display function layer, and the projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate are point A, point B, and point C, respectively; wherein point A, point B, and point C are arranged along a first direction, the distance between point A and point B is a, the distance between point B and point C is b, and a≠b; or, point A and point B are located on a straight line parallel to the first direction, and point C is located outside the straight line where points A and B are located. By optimizing the position of the through hole connecting the sub-pixel anode and adopting a non-uniformly spaced or non-linear through hole array arrangement, the loss of sub-pixel pixel opening area caused by the through hole can be avoided, thereby improving the sub-pixel aperture ratio and lifespan, improving color shift, and improving the display effect of the display panel.

[0087] Based on the same concept, an embodiment of the present application also provides a display device. Figure 11 is a schematic structural diagram of a display device provided in an embodiment of the present application. As shown in Figure 11, the display device includes any of the display panels provided in the above embodiments. Exemplarily, as shown in Figure 11, the display device 400 includes the display panel 200 or the display panel 300. Therefore, the display device also has the effects of the display panels in the above embodiments. The similarities can be understood by referring to the above explanation of the display panel, and will not be repeated below.

[0088] The display device 400 provided in the embodiment of the present application can be the mobile phone shown in Figure 11, or it can be any electronic product with a display function, including the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiment of the present application does not specifically limit this.

Claims

1. A display panel, comprising: substrate; A pixel circuit layer, an insulating layer, and a display function layer are sequentially stacked on one side of the base substrate; The pixel circuit layer includes a plurality of pixel circuits arranged in an array, the insulating layer includes a plurality of through holes, the through holes are filled with conductive structures, the display function layer includes a plurality of light-emitting elements, and the pixel circuits are electrically connected to the light-emitting elements through the conductive structures; The display panel includes a plurality of pixel units, each pixel unit including a first light-emitting element, a second light-emitting element, and a third light-emitting element having different luminous colors. The through holes include a first through hole, a second through hole, and a third through hole. The first through hole, the second through hole, and the third through hole are respectively arranged corresponding to the first light-emitting element, the second light-emitting element, and the third light-emitting element. The projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate are points A, B, and C, respectively. Among them, the three points A, B and C are arranged along a first direction, the distance between point A and point B is a, the distance between point B and point C is b, a≠b, and the first direction is parallel to the row direction or column direction of the array formed by the pixel circuits.

2. The display panel according to claim 1, wherein The first light-emitting elements and the second light-emitting elements are arranged alternately along a second direction, a plurality of third light-emitting elements are arranged along the second direction, the first light-emitting elements and the third light-emitting elements are arranged alternately along the first direction, the second light-emitting elements and the third light-emitting elements are arranged alternately along the first direction, and the second direction intersects with the first direction.

3. The display panel according to claim 2, wherein: a>b.

4. The display panel according to claim 2, wherein: The first light-emitting element is a red light-emitting element or a green light-emitting element, the second light-emitting element is the other of the red light-emitting element and the green light-emitting element, and the third light-emitting element is a blue light-emitting element.

5. The display panel according to claim 2, wherein: Along the first direction, at least part of the light emitting area of ​​the first light emitting element and at least part of the light emitting area of ​​the second light emitting element overlap with the light emitting area of ​​the third light emitting element. The display panel according to claim 2 , wherein: The three points A, B and C are located on a same straight line parallel to the first direction; The distance between two corresponding points A in two adjacent pixel units along the first direction is p1, the distance between the corresponding point C in the first pixel unit and the corresponding point A in the second pixel unit is c, a≠b≠c, and a+b+c=p1.

7. The display panel according to claim 6, wherein: a, b, and c satisfy at least one of the following conditions: a=1 / 3p1; b<1 / 3p1; c>1 / 3p1.

8. The display panel according to claim 2, wherein: Point A and Point B are located on the same straight line parallel to the first direction, Point C is located outside the straight line where Point A and Point B are located, and the vertical projection of Point C on the straight line where Point A and Point B are located is Point D; The distance between the corresponding two points A in two adjacent pixel units along the first direction is p2, the distance between point B and point D in the first pixel unit is b1, and the distance between point D and the corresponding point A in the second pixel unit is c1, a≠b1≠c1, and a+b1+c1=p2.

9. The display panel according to claim 8, wherein: a, b1, c1 satisfy at least one of the following conditions: a=1 / 3p2; b1<1 / 3p2; c1>1 / 3p2.

10. The display panel according to claim 8, wherein: The distance d1 between the point C and the point D is less than 10 μm.

11. The display panel according to claim 1, wherein: The three points, point A, point B and point C, are located on a same straight line parallel to the first direction.

12. The display panel according to claim 1, wherein: The two points A and B are located on a straight line parallel to the first direction, and the point C is located outside the straight line where the two points A and B are located.

13. A display panel comprising: substrate; A pixel circuit layer, an insulating layer, and a display function layer are sequentially stacked on one side of the base substrate; The pixel circuit layer includes a plurality of pixel circuits arranged in an array, the insulating layer includes a plurality of through holes, the through holes are filled with conductive structures, the display function layer includes a plurality of light-emitting elements, and the pixel circuits are electrically connected to the light-emitting elements through the conductive structures; The display panel includes a plurality of pixel units, each pixel unit including a first light-emitting element, a second light-emitting element, and a third light-emitting element having different luminous colors. The through holes include a first through hole, a second through hole, and a third through hole. The first through hole, the second through hole, and the third through hole are respectively arranged corresponding to the first light-emitting element, the second light-emitting element, and the third light-emitting element. The projections of the center points of the first through hole, the second through hole, and the third through hole on the base substrate are points A, B, and C, respectively. Among them, the three points A, B and C are arranged along a first direction, point A and point B are located on a straight line parallel to the first direction, point C is located outside the straight line where point A and point B are located, and the first direction is parallel to the row direction or column direction of the array formed by the pixel circuits.

14. The display panel according to claim 13, wherein: In the same pixel unit, a line connecting the centers of the first light-emitting element, the second light-emitting element, and the third light-emitting element forms a triangle; In multiple pixel units, the first light-emitting elements, the second light-emitting elements and the third light-emitting elements are alternately arranged along the first direction, and multiple first light-emitting elements, multiple second light-emitting elements and multiple third light-emitting elements are all arranged along a second direction, and the second direction intersects with the first direction.

15. The display panel according to claim 14, wherein: The vertical projection of point C on the straight line between point A and point B is point D; The distance between point A and point B is a1, and the distance between point D and point B is b1, where a1=b1.

16. The display panel according to claim 15, wherein: The distance d2 between the point C and the point D is less than 12 μm.

17. The display panel according to claim 13, wherein: The distance between point A and point B is a2, and the distance between point B and point C is b2, where a2=b2.

18. A display device comprising the display panel according to any one of claims 1 to 17.

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