Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a first substrate, the first substrate comprises a plurality of arrayed sub-pixel regions, each of the sub-pixel regions comprises a main binding pad and a backup binding pad arranged on the first substrate, and a micro light emitting diode electrically connected with the main binding pad or the backup binding pad. The main binding pad and the backup binding pad are in a first symmetrical mode with respect to a first symmetrical reference object. The sub-pixel region is in a second symmetrical mode with respect to a second symmetrical reference object. The first symmetrical mode is the same as the second symmetrical mode. The distance between the vertical projection of the first symmetrical reference object on the first substrate and the vertical projection of the second symmetrical reference object on the first substrate is S1, and S1 is less than or equal to 10 microns. The problem that the micro light emitting diode is damaged and the sub-pixel cannot display is solved. Even if the sub-pixel is repaired, the light emitting effect of the sub-pixel is still consistent with that when the sub-pixel is not repaired, and the display uniformity is ensured.

Description

[0001] This application is a divisional application of application No. 202011379140.6, titled "A display panel and a display device", filed on November 30, 2020. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0003] At present, Micro Light Emitting Diode (Micro LED) display panels are increasingly attracting the attention of the display market due to their high brightness, low operating voltage, small power consumption, long service life, impact resistance, and stable performance.

[0004] The existing Micro-LED display panel includes a plurality of sub-pixels arranged in an array, each sub-pixel includes a main binding pad and a backup binding pad, when the micro light emitting diode on the main binding pad is damaged, the micro light emitting diode arranged on the backup binding pad is enabled to ensure the display of the sub-pixel.

[0005] However, the relative positions of the main binding pad and the backup binding pad with respect to the sub-pixel are different in the prior art. Because the intensity of light emitted by the micro light emitting diode in each direction is different, when the sub-pixel is repaired, the light output effect after repair will be obviously different from that before repair, which will undoubtedly affect the display uniformity of the display panel. SUMMARY

[0006] Embodiments of the present application provide a display panel and a display device, which can ensure that the light output effect of the sub-pixel after repair is consistent with that before repair, and ensure the display uniformity.

[0007] In a first aspect, embodiments of the present application provide a display panel, the display panel comprising:

[0008] a first substrate, the first substrate comprising a plurality of sub-pixel regions arranged in an array, each sub-pixel region comprising:

[0009] a main binding pad and a backup binding pad arranged on the first substrate;

[0010] a micro light emitting diode electrically connected to the main binding pad or the backup binding pad;

[0011] the main binding pad and the backup binding pad are in a first symmetrical manner with respect to a first symmetrical reference object; and the sub-pixel region is in a second symmetrical manner with respect to a second symmetrical reference object;

[0012] The first symmetric manner and the second symmetric manner are the same.

[0013] A distance between a vertical projection of the first symmetric reference object on the first substrate and a vertical projection of the second symmetric reference object on the first substrate is S1, and S1≤10μm.

[0014] In a second aspect, the embodiments of the present application further provide a display device, comprising the display panel of the first aspect.

[0015] The display panel and the display device provided by the embodiments of the present application solve the problem that the sub-pixel cannot display when the micro light emitting diode is damaged in the prior art by arranging the main binding pad and the standby binding pad in each sub-pixel area and enabling the micro light emitting diode on the standby binding pad to ensure the display of the sub-pixel when the micro light emitting diode on the main binding pad is damaged. In addition, since the main binding pad and the standby binding pad are arranged in the first symmetric manner with respect to the first symmetric reference object, and the sub-pixel area where the main binding pad and the standby binding pad are arranged is arranged in the second symmetric manner with respect to the second symmetric reference object, the positions of the main binding pad and the standby binding pad relative to the sub-pixel are basically the same, that is, the positions of the micro light emitting diode electrically connected to the main binding pad and the micro light emitting diode electrically connected to the standby binding pad relative to the sub-pixel are basically the same, which avoids the difference in light emission effect of the sub-pixel caused by the difference in the positions of the main binding pad and the standby binding pad relative to the sub-pixel. Moreover, even if the subsequent film layer has an influence on the light emitted by the micro light emitting diode, since the topography of the subsequent film layer is symmetrically arranged, the influence of the subsequent film layer on the light emitted by the micro light emitting diode electrically connected to the main binding pad and the light emitted by the micro light emitting diode electrically connected to the standby binding pad is basically the same. Therefore, even if the sub-pixel is repaired, the light emission effect after the repair is basically the same as that before the repair, which avoids the obvious difference in the light emission effect of the sub-pixel before and after the repair, and affects the display uniformity of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings:

[0017] Figure 1 is a structural schematic diagram of a display panel provided by the embodiments of the present application;

[0018] Figure 2 is Figure 1 is an enlarged view of the dashed box in FIG. 8;

[0019] Figure 3 is a partial film layer structure schematic diagram of a display panel provided by the embodiments of the present application;

[0020] Figure 4 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0021] Figure 5 is a structure schematic diagram of a single-electrode micro light-emitting diode provided by an embodiment of the present application;

[0022] Figure 6 is a structure schematic diagram of a double-electrode micro light-emitting diode provided by an embodiment of the present application;

[0023] Figure 7 is a partial film layer structure schematic diagram of a display panel provided by an embodiment of the present application;

[0024] Figure 8 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0025] Figure 9 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0026] Figure 10 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0027] Figure 11 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0028] Figure 12 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0029] Figure 13 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0030] Figure 14 is a partial film layer structure schematic diagram of a display panel provided by an embodiment of the present application;

[0031] Figure 15 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application;

[0032] Figure 16 is a structure schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be combined with the drawings of the embodiments of the present application, and the technical solutions of the present application will be described in detail through specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] In view of the problems in the background art, the embodiments of the present application provide a display panel. Figure 1 is a structural schematic diagram of a display panel provided by the embodiments of the present application, Figure 2 is Figure 1 is an enlarged view of the dashed box in FIG. 1, as shown in FIG. 2, Figure 1 and Figure 2 The display panel 100 provided by the embodiments of the present application includes: a first substrate 10, the first substrate 10 includes a plurality of arrayed sub-pixel regions BB, each sub-pixel region BB includes: a main binding pad 20 and a backup binding pad 30 disposed on the first substrate 10; a micro light emitting diode (not shown in the figure) electrically connected with the main binding pad 20 or the backup binding pad 30; the main binding pad 20 and the backup binding pad 30 are in a first symmetrical mode about a first symmetrical reference object 40; the sub-pixel region BB is in a second symmetrical mode about a second symmetrical reference object 50; the first symmetrical mode and the second symmetrical mode are the same; the distance between the vertical projection of the first symmetrical reference object 40 on the first substrate 10 and the vertical projection of the second symmetrical reference object 50 on the first substrate 10 is S1, S1≤10μm. It should be noted that when referring to the size of different products, S1 can be set by referring to the following formula, i.e., S1 / Q1<50%; wherein Q1 is the size of the long side of the micro light emitting diode.

[0035] Specifically, in the present embodiment, the main binding pad 20 and the backup binding pad 30 are disposed in each sub-pixel region BB at the same time, when the micro light emitting diode on the main binding pad 20 is damaged, the micro light emitting diode with the same light emitting color disposed on the backup binding pad 30 is enabled, i.e., the micro light emitting diode disposed on the backup binding pad 30 replaces the damaged micro light emitting diode on the main binding pad 20 to emit light, realizing the display of the sub-pixel, solving the problem that when the micro light emitting diode in the sub-pixel region is damaged, the sub-pixel where the micro light emitting diode is located cannot be displayed, affecting the display effect in the prior art.

[0036] Further, considering that the intensity of light emitted by the micro light emitting diode in each direction is different, the position of the binding pad determines the position of the micro light emitting diode, and the position of the micro light emitting diode determines the light emitting effect of the sub-pixel where the micro light emitting diode is located, so when the positions of the main binding pad 20 and the backup binding pad 30 relative to the sub-pixel are different, the positions of the micro light emitting diode electrically connected to the main binding pad 20 and the micro light emitting diode electrically connected to the backup binding pad 30 relative to the sub-pixel are also different, thus causing the light emitting effect of the sub-pixel to differ. In addition, considering that some film layers on the side away from the first substrate 10 of the micro light emitting diode will have different edge and center topographies during the manufacturing process, for example, when printing a quantum dot structure by inkjet printing technology, a coffee ring effect will occur, in which the thickness of the quantum dot structure at the edge of the sub-pixel area BB is larger, and the thickness of the quantum dot structure at the middle part is smaller; for another example, when manufacturing a color resistance structure, a horn-shaped protrusion will be formed at the overlapping part between the color resistance structure and the shielding structure, which is a horn effect. Therefore, when the positions of the main binding pad 20 and the backup binding pad 30 relative to the sub-pixel are different, the light emitted by the micro light emitting diode electrically connected to the main binding pad 20 and the light emitted by the micro light emitting diode electrically connected to the backup binding pad 30 will pass through the subsequent film layers of the sub-pixel, and the subsequent film layers will have different effects on the light, which will further cause the light emitting effect of the sub-pixel to differ. Exemplarily, Figure 3 is a partial film layer structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 3As shown, the main binding pad 20 is close to the center of the sub-pixel area BB, and the backup binding pad 30 is close to the edge of the sub-pixel area BB, that is, the position difference of the main binding pad 20 and the backup binding pad 30 relative to the sub-pixel is relatively large. When the color resistance structure 60 is arranged on the side of the micro light emitting diode 21 away from the first substrate 10, the light emitted by the micro light emitting diode 21 electrically connected with the main binding pad 20 and the light emitted by the micro light emitting diode 21 electrically connected with the backup binding pad 30 pass through the color resistance structure 60. Due to the different topographies of the edge and the center of the color resistance structure 60, the color resistance structure 60 has different effects on the light emitted by the micro light emitting diode 21 close to the center of the sub-pixel area BB and the light emitted by the micro light emitting diode 21 close to the edge of the sub-pixel area BB, resulting in different light emitting effects of the sub-pixel. That is, when the micro light emitting diode 21 on the main binding pad 20 is damaged, the micro light emitting diode 21 on the backup binding pad 30 is started to ensure the light emission of the sub-pixel, and the light emitting effect of the sub-pixel is obviously different, which affects the display effect. Therefore, in the embodiment, the main binding pad 20 and the backup binding pad 30 are arranged in the first symmetric mode relative to the first symmetric reference object 40, and the sub-pixel area BB is arranged in the second symmetric mode relative to the second symmetric reference object 50, the first symmetric mode and the second symmetric mode are the same, so that the positions of the main binding pad 20 and the backup binding pad 30 relative to the sub-pixel are basically the same, that is, the positions of the micro light emitting diode electrically connected with the main binding pad 20 and the micro light emitting diode electrically connected with the backup binding pad 30 relative to the sub-pixel are the same. Even if the subsequent film layer has an effect on the light emitted by the micro light emitting diode, since the topography of the subsequent film layer is symmetrically arranged, the effect of the subsequent film layer on the light emitted by the micro light emitting diode electrically connected with the main binding pad 20 and the light emitted by the micro light emitting diode electrically connected with the backup binding pad 30 is basically the same. Therefore, even if the sub-pixel is repaired, the light emitting effect after repair is basically the same as that before repair, avoiding the obvious difference between the light emitting effect after repair and that before repair, and affecting the display uniformity of the display panel.

[0037] The first symmetric mode and the second symmetric mode can be axisymmetric, or the first symmetric mode and the second symmetric mode can be center symmetric.

[0038] For example, continuing to refer to Figure 2, the first symmetry manner and the second symmetry manner are both axis symmetry; the first symmetry reference object 40 is a first symmetry axis, and the second symmetry reference object 50 is a second symmetry axis; the first symmetry axis and the second symmetry axis are parallel. That is, the main binding pad 20 and the standby binding pad 30 are axis symmetric about the first symmetry axis, and the sub-pixel region BB where the main binding pad 20 and the standby binding pad 30 are located is axis symmetric about the second symmetry axis, and the first symmetry axis and the second symmetry axis are parallel, the distance between the vertical projection of the first symmetry axis on the first substrate 10 and the vertical projection of the second symmetry axis on the first substrate 10 is S1, S1≤10μm, for example, S1 is 0, that is, the first symmetry axis and the second symmetry axis coincide.

[0039] Exemplarily, Figure 4 is a partial structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 4 , the first symmetry manner and the second symmetry manner are both center symmetry; the first symmetry reference object 40 is a first symmetry center, and the second symmetry reference object 50 is a second symmetry center. That is, the main binding pad 20 and the standby binding pad 30 are center symmetric about the first symmetry center, and the sub-pixel region BB where the main binding pad 20 and the standby binding pad 30 are located is center symmetric about the second symmetry center, and the distance between the vertical projection of the first symmetry center on the first substrate 10 and the vertical projection of the second symmetry center on the first substrate 10 is S1, S1≤10μm, for example, S1 is 0, that is, the first symmetry center and the second symmetry center coincide.

[0040] Optionally, the first substrate 10 can be a rigid substrate or a flexible substrate, when the first substrate 10 is a rigid substrate, the material of the first substrate 10 includes glass and the like; when the first substrate 10 is a flexible substrate, the material of the first substrate 10 can include at least one of polyetherimide (PEI), polyethylene terephthalate (PET), polyimide (PI) and polyethylene naphthalate (PEN).

[0041] Optionally, the micro light emitting diode can include a single-electrode micro light emitting diode, and can also include a double-electrode micro light emitting diode, which can be selected by those skilled in the art according to actual conditions, and the embodiment is not specifically limited. Figure 5 is a structure schematic diagram of a single-electrode micro light emitting diode provided by an embodiment of the present application, as shown in Figure 5 , when the micro light emitting diode includes a single-electrode micro light emitting diode, the single-electrode micro light emitting diode includes a first electrode 61, a first type semiconductor layer 62, an active layer 63, a second type semiconductor layer 64 and a second electrode 65 arranged in sequence away from the first substrate 10. Figure 6 is a structure schematic diagram of a double-electrode micro light emitting diode provided by an embodiment of the present application, as shown in Figure 6As shown, when the micro light emitting diode comprises a double-electrode micro light emitting diode, the double-electrode micro light emitting diode comprises a first-type semiconductor layer 62, an active layer 63 and a second-type semiconductor layer 64 arranged in sequence away from the first substrate 10; further comprising a first electrode 61 and a second electrode 65; wherein the first electrode 61 is located on the side of the first-type semiconductor layer 62 away from the active layer 63; and the second electrode 65 is located on the side of the second-type semiconductor layer 64 close to the active layer 63.

[0042] It can be understood that the display panel 100 in the embodiment of the present application can be an active matrix light emitting diode display panel or a passive matrix light emitting diode display panel. When the display panel 100 is an active matrix light emitting diode display panel, each sub-pixel region BB in the display panel 100 is further provided with a driving circuit (not shown in the figure), which is electrically connected with the micro light emitting diode and used for driving the micro light emitting diode in the corresponding sub-pixel region BB to emit light. Under the premise of being able to realize the above functions, the specific structure of the driving circuit is not specifically limited in the embodiment of the present application; when the display panel 100 is a passive matrix light emitting diode display panel, each micro light emitting diode can be driven by rows, columns or individually, and the specific driving mode is not specifically limited in the embodiment of the present application.

[0043] Optionally, Figure 7 is another partial film layer structure schematic diagram of a display panel provided by the embodiment of the present application, as shown in Figure 7 As shown, the sub-pixel region BB further comprises a first reflection unit 81 and a second reflection unit 82, the first reflection unit 81 is located on the side of the main binding pad 20 close to the first substrate 10, and the second reflection unit 82 is located on the side of the standby binding pad 30 close to the first substrate 10; the first reflection unit 81 and the second reflection unit 82 are in a seventh symmetric mode about a seventh symmetric reference object 83; the first symmetric mode and the seventh symmetric mode are the same; the distance between the vertical projection of the seventh symmetric reference object 83 on the first substrate and the vertical projection of the first symmetric reference object on the first substrate is S6, and S6≤10μm. It should be noted that when the size of different products is involved, S6 can be set by referring to the following formula, i.e. S6 / Q1<50%; wherein Q1 is the size of the long side of the micro light emitting diode 21. Figure 7S6 is 0, that is, the first reference object 40, the second reference object 50 and the seventh symmetric reference object 83 coincide. When the light emitted by the micro light emitting diode 21 of the main binding pad 20 is started, the first reflection unit 81 reflects the light emitted thereby; when the micro light emitting diode 21 electrically connected to the standby binding pad 30 is started, the second reflection unit 82 reflects the light emitted thereby, that is, the light emitting efficiency of the sub-pixel is improved by the reflection unit arranged; in addition, since the lower surface of the main binding pad 20 and the standby binding pad 30 is provided with the reflection unit, and the first reflection unit 81 and the second reflection unit 82 are in the seventh symmetric mode with respect to the seventh symmetric reference object 83; the first symmetric mode and the seventh symmetric mode are the same; the distance between the vertical projection of the seventh symmetric reference object 83 on the first substrate 10 and the vertical projection of the first symmetric reference object 40 on the first substrate 10 is small, which further makes the light emitting effect of the sub-pixel after repair basically consistent with that before repair. Optionally, when the display panel is an active matrix light emitting diode display panel, the driving circuit in the display panel, for example, includes a plurality of metal layers, and the first reflection layer and the second reflection layer, for example, can be arranged in the same layer as the metal layer closest to the side of the main binding pad, so that the process steps are simplified.

[0044] In summary, the display panel provided by the embodiment of the present application solves the problem that the sub-pixel where the micro light emitting diode is located cannot display when the micro light emitting diode is damaged by arranging the main binding pad and the standby binding pad in each sub-pixel area, and starting the micro light emitting diode on the standby binding pad to ensure the display of the sub-pixel when the micro light emitting diode on the main binding pad is damaged; in addition, since the main binding pad and the standby binding pad are arranged in the first symmetric mode with respect to the first symmetric reference object, and the sub-pixel area where the main binding pad and the standby binding pad are arranged is arranged in the second symmetric mode with respect to the second symmetric reference object, the positions of the main binding pad and the standby binding pad relative to the sub-pixel are basically the same, that is, the positions of the micro light emitting diode electrically connected to the main binding pad and the micro light emitting diode electrically connected to the standby binding pad relative to the sub-pixel are basically the same, which avoids the difference in light emitting effect of the sub-pixel caused by the difference in the positions of the main binding pad and the standby binding pad relative to the sub-pixel; and even if the subsequent film layer has an effect on the light emitted by the micro light emitting diode, since the topography of the subsequent film layer is symmetrically arranged, the effect of the subsequent film layer on the light emitted by the micro light emitting diode electrically connected to the main binding pad and the light emitted by the micro light emitting diode electrically connected to the standby binding pad is basically the same, so that even if the sub-pixel is repaired, the light emitting effect after repair is basically consistent with that before repair, which avoids the obvious difference in the light emitting effect of the sub-pixel after repair and before repair, and affects the display uniformity of the display panel.

[0045] Optionally, continuing to refer to Figure 2The distance W1 between the main binding pad 20 and the backup binding pad 30 ranges from 10 μm to 50 μm. For example, the distance W1 between the main binding pad 20 and the backup binding pad 30 is 10 μm, 15 μm, 20 μm, 30 μm or 50 μm. The distance range between the main binding pad 20 and the backup binding pad 30 is set to 10 μm to 50 μm, so that the main binding pad 20 and the backup binding pad 30 are not both located at the edge of the sub-pixel region BB due to the too large distance between the main binding pad 20 and the backup binding pad 30, so that the light emitting flux of the sub-pixel is reduced and the light emitting effect is affected no matter whether the micro light emitting diode electrically connected with the main binding pad 20 emits light or the micro light emitting diode on the backup binding pad 30 emits light, and the micro light emitting diode is not affected in display due to the short circuit between the main binding pad 20 and the backup binding pad 30 caused by the too small distance between the main binding pad 20 and the backup binding pad 30. Therefore, the distance range between the main binding pad 20 and the backup binding pad 30 is preferably set to 10 μm to 50 μm, so that the better light emitting effect of the display panel 100 is ensured and the normal display of the micro light emitting diode is not affected.

[0046] In addition, the short circuit between the main binding pad and the backup binding pad can be prevented not only by limiting the distance between the main binding pad and the backup binding pad, but also by setting the positional relationship between the main binding pad and the backup binding pad. Optionally, Figure 8 is another partial structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 8 The first symmetric mode and the second symmetric mode are both center symmetry; the first symmetric reference object is the first symmetric center, and the second symmetric reference object is the second symmetric center; wherein, Figure 8Taking S1 as 0, i.e., the first symmetry center and the second symmetry center coincide as an example. The main binding pad 20 includes a first main binding pad 21 and a second main binding pad 22; the standby binding pad 30 includes a first standby binding pad 31 and a second standby binding pad 32, i.e., the type of micro light emitting diode electrically connected to the main binding pad 20 or the micro light emitting diode electrically connected to the standby binding pad at this time is a double electrode micro light emitting diode. Among them, the projection of the first standby binding pad 31 on the connecting line of the first main binding pad 21 and the second main binding pad 22 is located in the gap EE between the first main binding pad 21 and the second main binding pad 22; the projection of the second main binding pad 22 on the connecting line of the first standby binding pad 31 and the second standby binding pad 32 is located in the gap DD between the first standby binding pad 31 and the second standby binding pad 32. That is, by staggering the first main binding pad 21 and the second main binding pad 22 in the main binding pad 20 and the first standby binding pad 31 and the second standby binding pad 32 in the standby binding pad 30, the short circuit between the first main binding pad 21 and the second main binding pad 22 and the first standby binding pad 31 and the second standby binding pad 32 can be avoided.

[0047] Optionally, when the first symmetry mode and the second symmetry mode are both axisymmetric; the first symmetry reference object is a first symmetry axis, and the second symmetry reference object is a second symmetry axis; the first symmetry axis and the second symmetry axis are parallel, the second symmetry axis of each sub-pixel region is parallel. In order to illustrate this beneficial effect, the following content will be compared with the case that the second symmetry axis of each sub-pixel region is partially parallel and partially perpendicular in the display panel. Among them, taking S1 as 0, i.e., the first symmetry axis and the second symmetry axis coincide as an example.

[0048] Exemplarily, Figure 9 is another partial structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 9As shown, the plurality of sub-pixel regions BB includes a first sub-pixel region BB1, a second sub-pixel region BB2, and a third sub-pixel region BB3, wherein the second symmetry axis of the first sub-pixel region BB1 is parallel to the second symmetry axis of the second sub-pixel region BB2, and the second symmetry axis of the first sub-pixel region BB1 is perpendicular to the second symmetry axis of the third sub-pixel region BB3. Since the directions of the symmetry axes are different, that is, the directions of the micro light-emitting diodes are different, when the micro light-emitting diodes are transferred to the corresponding sub-pixel regions BB, since the second symmetry axis of the first sub-pixel region BB1 is parallel to the second symmetry axis of the second sub-pixel region BB2, the micro light-emitting diodes in the first sub-pixel region BB1 and the micro light-emitting diodes in the second sub-pixel region BB2 can be transferred at the same time, and since the second symmetry axis of the first sub-pixel region BB1 is perpendicular to the second symmetry axis of the third sub-pixel region BB3, the micro light-emitting diodes in the third sub-pixel region BB3 cannot be transferred by using the same transfer process. Since the original process of transferring the micro light-emitting diodes in the display panel is already relatively complex, if the directions of the symmetry axes are different, the cost and efficiency of manufacturing the display panel will inevitably be further increased.

[0049] Figure 10 is another partial structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 10 As shown, the plurality of sub-pixel regions BB includes a first sub-pixel region BB1, a second sub-pixel region BB2, and a third sub-pixel region BB3, wherein the second symmetry axis of the first sub-pixel region BB1, the second symmetry axis of the second sub-pixel region BB2, and the second symmetry axis of the third sub-pixel region BB3 are all parallel. Since the directions of the symmetry axes of the sub-pixel regions BB are the same, that is, the directions of the micro light-emitting diodes in the sub-pixel regions BB are the same regardless of whether the micro light-emitting diodes are located on the main binding pads 20 or the standby binding pads 30, the micro light-emitting diodes corresponding to all the sub-pixel regions BB can be transferred by using the same transfer process, and in the case of ensuring that the light-emitting effect after repairing the sub-pixel is basically the same as the light-emitting effect before repairing the sub-pixel, the process difficulty will not be increased.

[0050] Optionally, when the first symmetry manner and the second symmetry manner are both axis symmetry, the first symmetry reference object is the first symmetry axis, the second symmetry reference object is the second symmetry axis, and the first symmetry axis and the second symmetry axis are parallel, the second symmetry axis of the sub-pixel region is parallel to the long side of the sub-pixel region. In order to illustrate this beneficial effect, the following content will be compared with the case where the second symmetry axis of each sub-pixel region in the display panel is parallel to the short side of the sub-pixel region. For example, S1 is 0, that is, the first symmetry axis and the second symmetry axis coincide.

[0051] Exemplarily, Figure 11is a schematic view of a partial structure of a display panel provided by an embodiment of the present application, as shown in Figure 11 If the micro light emitting diode on the backup bonding pad 30 is enabled to ensure the display of the sub-pixel, the distance L2 from the edge of the micro light emitting diode to the edge of the area where the main bonding pad 20 is located is relatively long, and the light emitted by the micro light emitting diode on the backup bonding pad 30 covers the sub-pixel area BB, and the light uniformity in the sub-pixel area BB is poor.

[0052] Figure 12 is a schematic view of a partial structure of a display panel provided by an embodiment of the present application, as shown in Figure 12 The second symmetry axis of the sub-pixel area BB is parallel to the long side of the sub-pixel area BB. At this time, if the micro light emitting diode on the backup bonding pad 30 is enabled to ensure the display of the sub-pixel, the distance L1 from the edge of the micro light emitting diode to the edge of the area where the main bonding pad 20 is located is relatively short, the difference between the light rays covered by the micro light emitting diode on the backup bonding pad 30 in the sub-pixel area BB is small, the light of the sub-pixel is uniform, and the display effect of the display panel is improved.

[0053] Considering that other structures may also be provided in the sub-pixel area, the specific setting mode of the structure may also affect the light emission effect of the sub-pixel. The following will be described in detail in combination with typical examples, so that even if the sub-pixel is repaired, the light emission effect after repair is basically consistent with that before repair, wherein the first symmetry mode and the second symmetry mode are axisymmetric, and S1 is 0, that is, the first symmetry reference object and the second reference object coincide.

[0054] Optionally, Figure 13 is a schematic view of a partial structure of a display panel provided by an embodiment of the present application, as shown in Figure 13 The sub-pixel area BB includes a color resistance structure 60, and the color resistance structure 60 is in a third symmetry mode with respect to a third symmetry reference object 80; the first symmetry mode and the third symmetry mode are the same; the distance between the vertical projection of the third symmetry reference object 80 on the first substrate 10 and the vertical projection of the first symmetry reference object 40 on the first substrate 10 is S2, and S2≤10μm. It should be noted that when the size of different products is involved, S2 can be set by referring to the following formula, that is, S2 / Q1<50%; wherein Q1 is the size of the long side of the micro light emitting diode. Figure 13 Taking S2 as 0, that is, the first reference object 40, the second reference object 50 and the third reference object 80 coincide.

[0055] The color resistance structure 60 allows the color of the light passing through the color resistance structure 60 to be the same as the color of the light emitted by the sub-pixel corresponding to the color resistance structure 60, and the color display of the display panel is realized by arranging the color resistance structure 60. As known from the foregoing, when the color resistance structure 60 is manufactured, the color resistance structure 60 and the shielding structure form a horn-shaped protrusion at the overlapping portion, which is horn effect, and causes the color resistance structure 60 to have different appearances at the edge and the center. In this embodiment, the color resistance structure 60 is arranged in a third symmetrical manner with respect to the third symmetrical reference object 80; the first symmetrical manner and the third symmetrical manner are the same, and the vertical projection of the third symmetrical reference object 80 on the first substrate 10 is smaller than the vertical projection of the first symmetrical reference object 40 on the first substrate 10. Even if the color resistance structure 60 has different appearances at the edge and the center, the appearances are arranged symmetrically, so that the light emitted by the micro light-emitting diode electrically connected to the main binding pad 20 has the same light emission effect after passing through the color resistance structure 60 as the light emitted by the micro light-emitting diode electrically connected to the standby binding pad 30 after passing through the color resistance structure 60, that is, even if the sub-pixel is repaired, the light emission effect after the repair is basically the same as that before the repair, which ensures the display uniformity of the display panel 100.

[0056] On the basis of the above scheme, optionally, the first substrate includes a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region; wherein the arrangement manner of the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region is not limited in this embodiment, for example, it can be a standard arrangement manner or a diamond arrangement manner. Each sub-pixel region is provided with a main binding pad and a standby binding pad; the main binding pad or the standby binding pad of the red sub-pixel region is provided with a red micro light-emitting diode; the main binding pad or the standby binding pad of the green sub-pixel region is provided with a green micro light-emitting diode; and the main binding pad or the standby binding pad of the blue sub-pixel region is provided with a blue micro light-emitting diode. In this way, the color display of the display panel can be realized, and the light emission effect of the sub-pixel after the repair is basically the same as that before the repair, which ensures the display uniformity of the display panel.

[0057] Optionally, continuing to refer to Figure 13 , the sub-pixel region BB further includes a shielding structure 70, and the shielding structure 70 is arranged in a fourth symmetrical manner with respect to a fourth symmetrical reference object 90; the first symmetrical manner and the fourth symmetrical manner are the same; and the distance between the vertical projection of the fourth symmetrical reference object 90 on the first substrate and the vertical projection of the first symmetrical reference object 40 on the first substrate is S3, and S3≤10μm. It should be noted that when the size of different products is involved, S3 can be set according to the following formula, that is, S3 / Q1<50%; wherein Q1 is the size of the long side of the micro light-emitting diode. Figure 13Take S3 as 0, that is, the first reference object 40, the second reference object 50 and the fourth reference object 90 coincide as an example.

[0058] The shielding structure 70 can be composed of black material or other color light-absorbing material, so as to absorb most of the light irradiated thereon. By setting the shielding structure 70, the light leakage between the sub-pixels is shielded. In the embodiment, the shielding structure 70 is set in the fourth symmetric mode with respect to the fourth symmetric reference object 90; the first symmetric mode and the fourth symmetric mode are the same; the distance between the vertical projection of the fourth symmetric reference object 90 on the first substrate and the vertical projection of the first symmetric reference object on the first substrate is small, so that the shielding effect of the shielding structure 70 on the light is consistent whether the micro light-emitting diode on the main binding pad 20 is enabled or the micro light-emitting diode on the standby binding pad 30 is enabled, and further the light emitted by the sub-pixel is consistent, thereby ensuring the display uniformity of the display panel 100.

[0059] Optionally, Figure 14 is a partial film layer structure schematic diagram of a display panel provided by an embodiment of the present application, as Figure 14 As shown in the figure, the sub-pixel region further includes a barrier structure 91, the barrier structure 91 is in the fifth symmetric mode with respect to a fifth symmetric reference object 92; the first symmetric mode and the fifth symmetric mode are the same; the distance between the vertical projection of the fifth symmetric reference object 92 on the first substrate 10 and the vertical projection of the first symmetric reference object 40 on the first substrate 10 is S4, and S4≤10μm. It should be noted that when the size of different products is involved, S4 can be set by referring to the following formula, that is, S4 / Q1<50%; wherein Q1 is the size of the long side of the micro light-emitting diode. Figure 14 Take S4 as 0, that is, the first reference object 40, the second reference object 50, the fourth reference object 90 and the fifth symmetric reference object 92 coincide as an example.

[0060] The barrier structure 91 is used to limit the position of the micro light-emitting diode, and also can prevent the crosstalk of light between adjacent sub-pixels. In the embodiment, the barrier structure 91 is set in the fourth symmetric mode with respect to the fourth symmetric reference object 90; the first symmetric mode and the fourth symmetric mode are the same; the distance between the vertical projection of the fourth symmetric reference object 90 on the first substrate 10 and the vertical projection of the first symmetric reference object 40 on the first substrate 10 is small, so that the shielding effect of the barrier structure 91 on the light is consistent whether the micro light-emitting diode on the main binding pad 20 is enabled or the micro light-emitting diode on the standby binding pad 30 is enabled, and further the light emitted by the sub-pixel is consistent, thereby ensuring the display uniformity of the display panel 100.

[0061] Optionally, continuing to refer to Figure 14, at least part of the sub-pixel regions BB further comprise quantum dot structures 93, the quantum dot structures 93 are in a sixth symmetry mode with respect to a sixth symmetry reference object 94; the first symmetry mode and the sixth symmetry mode are the same; the distance between the vertical projection of the sixth symmetry reference object 94 on the first substrate 10 and the vertical projection of the first symmetry reference object 40 on the first substrate 10 is S5, S5≤10μm. It should be noted that when referring to the size of different products, S5 can be set according to the following formula, that is, S5 / Q1<50%; wherein Q1 is the size of the long side of the micro light emitting diode. Figure 14 For example, S5 is 0, that is, the first reference object 40, the second reference object 50, the fourth reference object 90, the fifth symmetry reference object 92 and the sixth symmetry reference object 94 coincide.

[0062] The quantum dot structures 93 are used to convert the color of the light emitted by the micro light emitting diode, and the color of the light emitted after passing through the quantum dot structures 93 is the same as the color of the light emitted by the sub-pixel corresponding to the quantum dot structures 93. As known from the foregoing, when the quantum dot structures 93 are printed by, for example, an inkjet printing technology, a coffee ring effect may occur, that is, the thickness of the quantum dot structures 93 at the edge of the sub-pixel region BB is larger, and the thickness of the quantum dot structures 93 at the middle part is smaller, resulting in different appearances of the quantum dot structures 93 at the edge and the center. In the embodiment, the quantum dot structures 93 are in a sixth symmetry mode with respect to the sixth symmetry reference object 94; the first symmetry mode and the sixth symmetry mode are the same; the distance between the vertical projection of the sixth symmetry reference object 94 on the first substrate 10 and the vertical projection of the first symmetry reference object 40 on the first substrate 10 is small. Even if the appearances of the quantum dot structures 93 at the edge and the center are different, the appearances are symmetrically arranged, so that the light emitted by the sub-pixel is consistent whether the micro light emitting diode on the main binding pad 20 is enabled or the micro light emitting diode on the standby binding pad 30 is enabled after conversion by the quantum dot structures 93. That is, even if the sub-pixel is repaired, the light emission effect before and after repair is basically consistent, which ensures the display uniformity of the display panel 100.

[0063] Optionally, continuing to refer to Figure 14 , at least part of the sub-pixel regions BB further comprise a first reflective layer 95 located above the quantum dot structures 93 (i.e., the side of the quantum dot structures 93 away from the first substrate 10) and a second reflective layer 96 located below the quantum dot structures 93 (i.e., the side of the quantum dot structures 93 close to the first substrate 10); that is, the first reflective layer 95 and the second reflective layer 96 are used to form a half-wavelength cavity, so as to increase the brightness of the vertically emitted quantum dot light source and improve the light emission efficiency of the sub-pixel. Similarly, the first reflective layer 95 and the second reflective layer 96 are symmetrically arranged, for example, centrally symmetric or axially symmetric.

[0064] On the basis of the above scheme, optionally, continuing to refer to Figure 14 The first substrate 10 includes a red sub-pixel region BB4, a green sub-pixel region BB5, and a blue sub-pixel region BB6; the red sub-pixel region BB4 includes red quantum dot structures 931; the green sub-pixel region BB5 includes green quantum dot structures 932; each sub-pixel region BB is provided with a blue micro light emitting diode 97.

[0065] Specifically, the red quantum dot structures 931 in the red sub-pixel region BB4 convert the blue light emitted by the blue micro light emitting diode 97 into red light, and the green quantum dot structures 932 in the green sub-pixel region BB5 convert the blue light emitted by the blue micro light emitting diode 97 into green light. Since the blue micro light emitting diode 97 emits blue light, the blue sub-pixel region BB6 does not need to be provided with quantum dot structures 93, and the above settings complete the color display of the display panel 100.

[0066] Optionally, continuing to refer to Figure 14 At least two of the first symmetric reference object 40, the second symmetric reference object 50, the third symmetric reference object 80, the fourth symmetric reference object 90, the fifth symmetric reference object 92, and the sixth symmetric reference object 94 overlap in the vertical projection on the first substrate 10. Among them, Figure 14 Taking an example in which the first symmetric reference object 40, the second symmetric reference object 50, the third symmetric reference object 80, the fourth symmetric reference object 90, the fifth symmetric reference object 92, and the sixth symmetric reference object 94 are all symmetric axes, and the vertical projections of the first symmetric reference object 40, the second symmetric reference object 50, the third symmetric reference object 80, the fourth symmetric reference object 90, the fifth symmetric reference object 92, and the sixth symmetric reference object 94 on the first substrate 10 all overlap. That is, the main binding pad 20 and the standby binding pad 30 are symmetrically arranged, and the sub-pixel region BB where the main binding pad 20 and the standby binding pad 30 are located is a symmetric region, and the structures in the sub-pixel region BB, such as the color resistance structure 60, the barrier structure 91, the quantum dot structure 93, and the shielding structure 70, are symmetrically arranged, so that the light emitting effect of the micro light emitting diode 97 electrically connected with the main binding pad 20 and the light emitting effect of the micro light emitting diode 97 electrically connected with the standby binding pad 30 are basically consistent. In this way, even if the sub-pixel is repaired, the light emitting effect after repair is basically consistent with that before repair.

[0067] Optionally, continuing to refer to Figure 14The display panel 100 further comprises a second substrate 99, and the display panel 100 is encapsulated and protected by the second substrate 99. Optionally, the color resistance structure 60, the quantum dot structure 93, and the parapet structure 91 can be arranged on the second substrate 99, and then the first substrate 10 and the second substrate 99 are laminated by a lamination process to form the display panel; or the above structures can be arranged on the side of the micro light emitting diode away from the first substrate 10 after the micro light emitting diode is transported, and the present embodiment does not limit this, and a person skilled in the art can prepare according to the actual situation of the product.

[0068] The above embodiments are applicable to both non-curved display panels and curved display panels. However, the curved display panel can also be arranged separately according to its own characteristics. Optionally, Figure 15 is another partial structure schematic diagram of a display panel provided by an embodiment of the present application, as shown in Figure 15 When the display panel 100 is a curved display panel, the display panel 100 comprises a curved portion; the bending axis ZZ of the curved portion is perpendicular to the first symmetry axis and the second symmetry axis. Among them, Figure 15 For example, the first symmetry axis and the second symmetry axis coincide. The advantage of this arrangement is that even if the curved portion can cause the film layer (such as the color resistance structure or the quantum dot structure) arranged on the curved portion to deform, since the bending axis ZZ of the curved portion is perpendicular to the first symmetry axis and the second symmetry axis, the deformation of the film layer is symmetrical, avoiding the problem that the light emitting effect of the sub-pixel is different before and after repair when the deformation is asymmetrical.

[0069] Based on the above inventive concept, an embodiment of the present application further provides a display device. The display device comprises the display panel according to any one of the embodiments of the present application, and therefore the display device provided by the embodiment of the present application has the corresponding beneficial effects of the display panel provided by the embodiment of the present application, which will not be repeated here. Illustratively, the display device can be a mobile phone, a computer, a smart wearable device (for example, a smart watch), a vehicle-mounted display device, and the like, and the present embodiment does not limit the electronic device.

[0070] Illustratively, Figure 16 is a structure schematic diagram of a display device provided by an embodiment of the present application. As shown in Figure 16 The display device 101 comprises the display panel 100 in the above embodiments.

[0071] Note that the above merely describes preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, modifications and substitutions can be made without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A display panel, characterized by, The display panel comprises: a first substrate comprising a plurality of arrayed sub-pixel regions, the sub-pixel regions comprising: a main binding pad and a backup binding pad disposed on the first substrate; a micro light emitting diode electrically connected to the main binding pad or the backup binding pad; the main binding pad and the backup binding pad are in a first symmetrical manner with respect to a first symmetrical reference object; the sub-pixel regions are in a second symmetrical manner with respect to a second symmetrical reference object; the first symmetrical manner and the second symmetrical manner are the same; a distance between a vertical projection of the first symmetrical reference object on the first substrate and a vertical projection of the second symmetrical reference object on the first substrate is S1, S1≤10μm; at least a part of the sub-pixel regions further comprise a quantum dot structure, the quantum dot structure is in a sixth symmetrical manner with respect to a sixth symmetrical reference object; the first symmetrical manner and the sixth symmetrical manner are the same; a distance between a vertical projection of the sixth symmetrical reference object on the first substrate and a vertical projection of the first symmetrical reference object on the first substrate is S5, S5≤10μm; a thickness of the quantum dot structure at an edge position of the sub-pixel region is greater than a thickness of the quantum dot structure at a middle position of the sub-pixel region.

2. The display panel of claim 1, wherein, The first symmetrical manner and the second symmetrical manner are both axisymmetric; the first symmetrical reference object is a first symmetry axis, and the second symmetrical reference object is a second symmetry axis; the first symmetry axis and the second symmetry axis are parallel.

3. The display panel of claim 2, wherein, Second symmetry axes of the sub-pixel regions are parallel.

4. The display panel of claim 2, wherein, Second symmetry axes of the sub-pixel regions are parallel to long sides of the sub-pixel regions.

5. The display panel of claim 2, wherein, The display panel comprises a bending portion; a bending axis of the bending portion is perpendicular to the first symmetry axis and the second symmetry axis.

6. The display panel of claim 1, wherein, The first symmetrical manner and the second symmetrical manner are both center-symmetric; the first symmetrical reference object is a first symmetry center, and the second symmetrical reference object is a second symmetry center.

7. The display panel of claim 6, wherein, The main binding pad comprises a first main binding pad and a second main binding pad; the backup binding pad comprises a first backup binding pad and a second backup binding pad; a projection of the first backup binding pad on a line connecting the first main binding pad and the second main binding pad is located in a gap between the first main binding pad and the second main binding pad; a projection of the second main binding pad on a line connecting the first backup binding pad and the second backup binding pad is located in a gap between the first backup binding pad and the second backup binding pad.

8. The display panel of claim 1, wherein, The sub-pixel regions comprise a color resistance structure, the color resistance structure is in a third symmetrical manner with respect to a third symmetrical reference object; the first symmetrical manner and the third symmetrical manner are the same; a distance between a vertical projection of the third symmetrical reference object on the first substrate and a vertical projection of the first symmetrical reference object on the first substrate is S2, S2≤10μm.

9. The display panel of claim 8, wherein, The sub-pixel region further comprises a barrier structure, the barrier structure is in a fifth symmetry mode with respect to a fifth symmetry reference object; the first symmetry mode and the fifth symmetry mode are the same; a distance between a vertical projection of the fifth symmetry reference object on the first substrate and the vertical projection of the first symmetry reference object on the first substrate is S4, S4≤10μm.

10. The display panel of claim 9, wherein, At least two of the first symmetry reference object, the second symmetry reference object, the third symmetry reference object, the fifth symmetry reference object and the sixth symmetry reference object have overlapping vertical projections on the first substrate.

11. The display panel of claim 1, wherein, The first substrate comprises a red sub-pixel region, a green sub-pixel region and a blue sub-pixel region; the red sub-pixel region comprises a red quantum dot structure; the green sub-pixel region comprises a green quantum dot structure; each sub-pixel region is provided with a blue micro light-emitting diode.

12. The display panel of claim 1, wherein, A distance between the main binding pad and the standby binding pad ranges from 10μm to 50μm.

13. The display panel of claim 1, wherein, At least part of the number of sub-pixel regions further comprises a first reflective layer and a second reflective layer, wherein the first reflective layer is located on a side of the quantum dot structure away from the first substrate, and the second reflective layer is located on a side of the quantum dot structure close to the first substrate.

14. A display device comprising: The display panel comprises any one of claims 1-13.

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