Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises an array substrate and a plurality of light emitting units arranged in an array. Each light-emitting unit comprises a plurality of light-emitting devices, the plurality of light-emitting devices comprise a first light-emitting device and a second light-emitting device, and the surface, deviating from the array substrate, of the first light-emitting device is closer to the array substrate than the surface, deviating from the array substrate, of the second light-emitting device. The surface, deviating from the array substrate, of the first light-emitting device comprises a first area and a second area, and the first area at least partially surrounds the second area. A first groove is formed in the side, away from the array substrate, of the first light-emitting device, and the first groove is overlapped with the first area in the direction perpendicular to the plane where the display panel is located. According to the light-emitting device, the first groove can be used for accommodating the light-absorbing material climbing to the first light-emitting surface, so that the light-emitting quantity difference caused by different coverage areas of the light-absorbing material between different light-emitting devices can be made up, and the phenomenon of non-uniform display of a display picture can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] In the prior art, some structures included in a display panel (such as a metal layer included in the panel) often have a relatively high degree of reflection of ambient light, resulting in the occurrence of glare phenomenon and reducing the display effect.

[0003] To solve this problem, a solution of setting a light-absorbing layer in the display panel is often adopted in the prior art. For example, a black ink is sprayed around a light-emitting device to form the above-mentioned light-absorbing layer. However, in the process of setting the above-mentioned light-absorbing layer, some components of the light-absorbing layer are likely to cover a part of the light-emitting surface of the light-emitting device. In particular, due to the limitation of the process level, the heights corresponding to different-color light-emitting devices are different (here, the height can refer to the distance between the light-emitting surface of the light-emitting device and the array substrate), and the area covered by the light-absorbing layer on the side of the light-emitting surface of the light-emitting device with a relatively small corresponding height is relatively large, thereby causing the problem of uneven brightness in the display screen. Summary of the Invention

[0004] In view of this, the present application provides a display panel and a display device to solve the above problem of uneven brightness.

[0005] In a first aspect, the present application provides a display panel, including an array substrate and a plurality of light-emitting units arranged in an array. Each light-emitting unit includes a plurality of light-emitting devices, and the plurality of light-emitting devices include a first light-emitting device and a second light-emitting device. The surface of the first light-emitting device facing away from the array substrate is closer to the array substrate than the surface of the second light-emitting device facing away from the array substrate. The surface of the first light-emitting device facing away from the array substrate includes a first region and a second region, and the first region at least partially surrounds the second region.

[0006] Wherein, a first groove is provided on the side of the first light-emitting device facing away from the array substrate, and the first groove overlaps with the first region in a direction perpendicular to the plane where the display panel is located.

[0007] In a second aspect, the present application provides a display device, including the display panel provided in the first aspect.

[0008] In the present application, the first groove can be used to accommodate the light-absorbing material that climbs onto the first light-emitting surface. When there is light-absorbing material climbing onto the above-mentioned first light-emitting surface, this part of the light-absorbing material can be preferentially filled into the first groove. That is, the first groove can prevent the further diffusion of the light-absorbing material on the above-mentioned first light-emitting surface, thereby restricting the area covered by the light-absorbing material on the first light-emitting surface. This setting method helps to make up for the difference in light-emitting amount caused by different coverage areas of the light-absorbing material between different light-emitting devices, and is beneficial to improving the uneven display phenomenon of the display screen. Description of the Drawings

[0009] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0010] Figure 1 Schematic diagram of a partial structure of a display panel related to the present application; Figure 2 Top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 3 For Figure 2 Schematic cross-sectional view of the display panel shown along the section line AA'; Figure 4 For Figure 2 Another schematic cross-sectional view of the display panel shown along the section line AA'; Figure 5 Schematic diagram of a partial structure of a display panel provided by the present application; Figure 6 Schematic diagram of a partial structure of a display panel provided by the present application; Figure 7 Schematic diagram of a partial structure of a display panel provided by the present application; Figure 8 Schematic diagram of a partial structure of a display panel provided by the present application; Figure 9 Top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 10 Top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 11 Top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 12 Top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 13 A top view schematic diagram of a partial structure of a display panel provided by the present application; Figure 14 is Figure 13 A schematic cross-sectional view of the display panel shown along the section line BB'; Figure 15 is Figure 13 Another schematic cross-sectional view of the display panel shown along the section line BB'; Figure 16 A schematic diagram of a display device provided by the present application. Specific embodiments

[0011] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0012] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0013] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0014] It should be understood that the term " / and / " used herein is only a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0015] Without departing from the spirit or scope of the present application, various modifications and changes can be made in the present application, which are obvious to those skilled in the art. Therefore, the present application is intended to cover the modifications and changes of the present application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided by the embodiments of the present application can be combined with each other without contradiction.

[0016] Part of the structure of the existing display panel usually has a strong reflection effect on external light. For example, the metal film layer where the pixel circuit in the display panel is located and some wiring structures, etc., can all reflect external light. The reflected light is likely to interfere with the normal display of the display panel after exiting the display panel, resulting in a glare phenomenon in the display screen and affecting the display effect of the display panel.

[0017] Figure 1 It is a schematic diagram of a partial structure of a display panel related to the present application.

[0018] To solve the above problems, as Figure 1 shown, in the prior art, it is usually selected to set a light-absorbing layer in the display panel 10' to reduce the amount of reflected light. Specifically, a light-absorbing material 02' (such as black ink) can be coated on one side of the array substrate 01', and the light-absorbing material 02' can cover some structures in the array substrate 01' (such as the metal layer corresponding to the pixel circuit and some wiring structures, etc.).

[0019] It should be noted that due to the small distance between adjacent light-emitting devices 03' and the certain wettability between the light-absorbing material 02' and the surface of the light-emitting device 03', during the process of coating the light-absorbing material 02', part of the light-absorbing material 02' is likely to climb to the light-emitting surface side of the light-emitting device 03', and then cover part of the light-emitting surface of the light-emitting device 03'.

[0020] In particular, during the bonding process of the light-emitting device 03' and the array substrate 01', the bonding electrode 031' of the light-emitting device 03' and the backplane electrode 011' on the array substrate 01' are usually heated by laser irradiation, so as to realize the electrical connection between the bonding electrode 031' and the backplane electrode 011'. However, the bonding effects corresponding to different color light-emitting devices 03' are often different. The reason is that when the laser irradiates the bonding structure corresponding to the light-emitting device 03' (including the above-mentioned bonding electrode 031' and backplane electrode 011'), the efficiency of the laser passing through the light-emitting body 032' of different color light-emitting devices 03' is different, resulting in inconsistent heating degrees of their respective corresponding bonding structures, causing differences in bonding effects. For example, compared with blue (green) light-emitting devices, the bonding structure corresponding to the red light-emitting device is likely to show an over-molten state after being heated. After the bonding is completed, compared with the light-emitting surface of the blue (green) light-emitting device, the light-emitting surface of the red light-emitting device is closer to the array substrate 01'. Therefore, if the light-emitting surface of the light-emitting device 03' is covered with the light-absorbing material 02', compared with the light-emitting surface of the blue (green) light-emitting device, the area covered by the light-absorbing material 02' on the light-emitting surface of the red light-emitting device is larger, and this problem is likely to cause uneven brightness in the display screen.

[0021] Figure 2 It is a top view schematic diagram of a partial structure of a display panel provided by the present application. Figure 3 is Figure 2 a schematic cross-sectional view of the display panel shown along the section line AA'. For the convenience of understanding, Figure 2 and Figure 3 structures such as pixel circuits and wiring structures are not shown in both.

[0022] In view of the above problems, combined with Figure 2 and Figure 3 The present application provides a display panel 10, which includes an array substrate 01. The array substrate 01 may be provided with a pixel circuit and a partial wiring structure (not shown in the drawings). The pixel circuit and the partial wiring structure may transmit electrical signals to the light-emitting device 20 through a backplane electrode 011 on the array substrate 01.

[0023] The display panel 10 further includes a plurality of light-emitting units 02 arranged in an array, and a single light-emitting unit 02 includes a plurality of light-emitting devices 20, and the light-emitting device 20 may be located on one side of the array substrate 01. The light-emitting device 20 may be a micro light-emitting diode (Micro Light Emitting Diode). The light-emitting device 20 may include a light-emitting body 201 and a binding electrode 202. The light-emitting body 201 may be used for emitting light. The light-emitting body 201 may be electrically connected to the backplane electrode 011 on the array substrate 01 through the binding electrode 202 to receive the electrical signal transmitted by the pixel circuit and part of the wiring structure. The light-emitting body 201 may include a first semiconductor layer 201a, a second semiconductor layer 201b and a light-emitting layer 201c. The first semiconductor layer 201a may be a P-type semiconductor layer, and the second semiconductor layer 201b may be an N-type semiconductor layer. The carriers in the first semiconductor layer 201a and the carriers in the second semiconductor layer 201b may be combined in the light-emitting layer 201c to realize the light-emitting process of the light-emitting device 20.

[0024] In addition, the display panel 10 may further include a light absorption structure 03, and the light absorption structure 03 and the light emitting device 20 may be located on the same side of the array substrate 01. Part of the light absorption structure 03 may be in contact with the side of the light emitting body 201, and part of the light absorption structure 03 may be located on the side of the light emitting body 201 away from the array substrate 01. The light absorption structure 03 may include a light absorption material, and the light absorption material may include black ink.

[0025] like Figure 3As shown, among the multiple light-emitting devices 20, there are a first light-emitting device 20a and a second light-emitting device 20b. Relative to the surface of the second light-emitting device 20b facing away from the array substrate 01, the surface of the first light-emitting device 20a facing away from the array substrate 01 is closer to the array substrate 01. Along the direction perpendicular to the plane where the display panel 10 is located, the distance between the surface 01s (which can be called the first light-emitting surface 01s) of the light-emitting body 201 of the first light-emitting device 20a facing away from the array substrate 01 and the array substrate 01 can be H1, and the distance between the surface 02s (which can be called the second light-emitting surface 02s) of the light-emitting body 201 of the second light-emitting device 20b facing away from the array substrate 01 and the array substrate 01 can be H2, where H1 < H2. Therefore, during the preparation of the above-mentioned light-emitting structure 03, relative to the above-mentioned second light-emitting surface 02s, the components of the light-absorbing structure 03 are more likely to climb to the above-mentioned first light-emitting surface 01s.

[0026] It should be noted that the first light-emitting device 20a and the second light-emitting device 20b can be light-emitting devices 20 of different colors respectively. For example, the light-emitting color of the first light-emitting device 20a can be red, and the light-emitting color of the second light-emitting device 20b can be blue or green.

[0027] Combined Figure 2 and Figure 3 , the surface of the first light-emitting device 20a facing away from the array substrate 01 includes a first region 2011 and a second region 2012, and the first region 2011 at least partially surrounds the second region 2012. During the preparation of the above-mentioned light-absorbing structure 03, if there is light-absorbing material climbing to the above-mentioned first light-emitting surface 01s, this part of the light-absorbing material can preferentially diffuse to the first region 2011 before diffusing to the second region 2012.

[0028] Among them, a first groove 04 is provided on one side of the first light-emitting device 20a facing away from the array substrate 01. Along the direction perpendicular to the plane where the display panel 10 is located, the first groove 04 overlaps with the first region 2011.

[0029] In the embodiment of the present application, the first groove 04 can be used to accommodate the light-absorbing material climbing to the above-mentioned first light-emitting surface 01s. When there is light-absorbing material climbing to the above-mentioned first light-emitting surface 01s, this part of the light-absorbing material can preferentially fill into the first groove 04. That is, the first groove 04 can hinder the further diffusion of the light-absorbing material on the above-mentioned first light-emitting surface 01s, and then limit the area size of the first light-emitting surface 01s covered by the light-absorbing material. This setting method helps to make up for the difference in light-emitting amount caused by different coverage areas of the light-absorbing material between different light-emitting devices, and is beneficial to improving the uneven display phenomenon of the display screen.

[0030] In an embodiment of the present application, as Figure 3As shown, a first groove 04 is provided on a portion of the surface of the first light-emitting device 20a facing away from the array substrate 01 corresponding to the first region 2011. That is, the first groove 04 can be provided on the first light-emitting surface 01s corresponding to the light-emitting body 201 of the first light-emitting device 20a (the surface of the light-emitting body 201 of the first light-emitting device 20a facing away from the array substrate 01). Therefore, an opening can be formed in the light-emitting body 201 of the first light-emitting device 20a by etching to form the above-mentioned first groove 04.

[0031] In the embodiment of the present application, if there is a light-absorbing material climbing onto the above-mentioned first light-emitting surface 01s, the light-absorbing material can preferentially enter the first groove 04; even if the first groove 04 cannot completely accommodate this part of the light-absorbing material, compared with the case where no groove is provided on the first light-emitting surface 01s, the solution of providing the first groove 04 can extend the diffusion path of this part of the light-absorbing material on the first light-emitting surface 01s, thereby hindering the process of the light-absorbing material diffusing to the second region 2012.

[0032] Figure 4 For Figure 2 Another cross-sectional schematic diagram of the display panel shown along the section line AA'.

[0033] In an embodiment of the present application, as Figure 4 shown, a filling layer 05 is covered on one side of the first light-emitting device 20a facing away from the array substrate 01, and the filling layer 05 can be located on one side of the light-emitting body 201 of the first light-emitting device 20a facing away from the array substrate 01.

[0034] A first groove 04 is provided on the side of the filling layer 05 facing away from the light-emitting device 20, that is, the first groove 04 can be formed on the surface of the filling layer 05 facing away from the light-emitting body 201.

[0035] In the embodiment of the present application, when the filling layer 05 covers the first light-emitting surface 01s corresponding to the first light-emitting device 20a (the surface of the light-emitting body 201 of the first light-emitting device 20a facing away from the array substrate 01), if there is a phenomenon of light-absorbing material climbing, this part of the light-absorbing material can climb to the surface of the filling layer 05 facing away from the light-emitting body 201. Considering that the filling layer 05 has a certain thickness, compared with the case where the filling layer 05 is not provided, the climbing path of this part of the light-absorbing material climbing to the side of the first light-emitting device 20a facing away from the array substrate 01 is longer, hindering the climbing process of the light-absorbing material.

[0036] In addition, the composition of the filling layer 05 can include inorganic materials. Compared with organic materials, inorganic materials have weaker wettability to black ink. Therefore, if the filling layer 05 is prepared using inorganic materials, it is more conducive to hindering the climbing process of the light-absorbing material.

[0037] Figure 5Schematic diagram of a partial structure of a display panel provided by the present application.

[0038] In an embodiment of the present application, as Figure 5 shown, a second groove 06 is provided in the second region 2012. The setting of the second groove 06 may be related to the structure of the light-emitting device 20 itself. To improve the light extraction efficiency of the light-emitting device 20, the roughness of the surface of the light-emitting body 201 facing away from the array substrate 01 may be increased. The implementation method may include providing a groove structure on the surface of the light-emitting body 201 facing away from the array substrate 01, and the groove structure may correspond to the second groove 06. It should be noted that the higher the surface roughness of the light-emitting body 201, the stronger the wettability between the light-absorbing material and the surface of the light-emitting body 201.

[0039] Among them, a part of the filling layer 05 is located in the second groove 06. Specifically, the second groove 06 may be filled with the filling layer 05. In this case, it is difficult for the light-absorbing material to diffuse into the second groove 06.

[0040] In the embodiment of the present application, the setting of the filling layer 05 can offset the influence of the second groove 06 on the roughness of the first light-emitting surface 01s, help weaken the tendency of the light-absorbing material to diffuse into the second region 2012, and thus improve the coverage of the light-absorbing material on the surface of the first light-emitting device 20a facing away from the array substrate 01.

[0041] Figure 6 Schematic diagram of a partial structure of a display panel provided by the present application, Figure 7 Schematic diagram of a partial structure of a display panel provided by the present application.

[0042] In an embodiment of the present application, in combination with Figure 6 and Figure 7 , a second groove 06 is provided in the second region 2012, and the width w2 of the second groove 06 is less than or equal to the width w1 of the first groove 04.

[0043] As Figure 6 shown, the width w2 of the second groove 06 is equal to the width w1 of the first groove 04. In this case, if an etching process is used to prepare both the first groove 04 and the second groove 06, during the preparation process of the first groove 04 and the second groove 06, the etching width corresponding to the first groove 04 and the etching width corresponding to the second groove 06 may be the same, which helps to reduce the preparation difficulty. The above-mentioned etching width may refer to the width of the region on the first light-emitting surface 01s that is affected by the etching process.

[0044] As Figure 7As shown, the width w2 of the second groove 06 is smaller than the width w1 of the first groove 04. At this time, it helps to make the space available for accommodating the light-absorbing material in the first groove 04 larger, which is conducive to restricting the coverage range of the light-absorbing material within the first region 2011 as much as possible.

[0045] In an embodiment of the present application, in combination with Figure 6 and Figure 7 , the depth h1 of the first groove 04 is greater than the depth h2 of the second groove 06.

[0046] If there is light-absorbing material climbing to the above-mentioned first light-emitting surface 01s (the surface of the light-emitting body 201 of the first light-emitting device 20a facing away from the array substrate 01), this part of the light-absorbing material can diffuse along the first light-emitting surface 01s and has a tendency to diffuse into the second region 2012. Then, during the diffusion process of this part of the light-absorbing material, this part of the light-absorbing material can diffuse along the inner wall of the first groove 04 (a part of the first light-emitting surface 01s) into the second region 2012, that is, the inner wall of the first groove 04 can also be regarded as a part of the diffusion path of this part of the light-absorbing material. In the embodiment of the present application, the greater the depth h1 of the first groove 04, the longer the corresponding diffusion path of this part of the light-absorbing material in the first groove 04, which is more conducive to hindering the diffusion of the light-absorbing material. In addition, the setting of h1 > h2 makes the diffusion difficulty of the light-absorbing material in the first groove 04 higher than that in the second groove 06, so this setting helps to limit the light-absorbing material within the first region 2011 as much as possible.

[0047] In an embodiment of the present application, as Figure 3 shown, the width of the first groove 04 is w1, and w1 satisfies: w1 ≥ 0.5 um. In this setting, the preparation difficulty of the first groove 04 is relatively low, and at the same time, it helps to hinder the diffusion process of the light-absorbing material.

[0048] Figure 8 It is a schematic diagram of a partial structure of a display panel provided by the present application.

[0049] In an embodiment of the present application, as Figure 8 shown, the spacing between two adjacent first grooves 04 is Δw, and Δw satisfies: Δw ≥ 0.3 um.

[0050] When the widths of the first region 2011 and the first groove 04 are both fixed, along the width direction of the first region 2011, the size of the spacing Δw between two adjacent first grooves 04 can affect the number of the first grooves 04 provided, and further affect the diffusion difficulty of the light-absorbing material in the first region 2011. In the embodiment of the present application, by setting Δw≥0.3um, it is possible to impede the diffusion of the light-absorbing material in the first region 2011 as much as possible on the premise of controlling the moderate preparation difficulty of the first groove 04.

[0051] Figure 9 It is a top view schematic diagram of a partial structure of a display panel provided by the present application.

[0052] In an embodiment of the present application, as Figure 9 shown, for the light-emitting devices 20 in the same light-emitting unit 02, two adjacent light-emitting devices 20 are arranged along the first direction X and partially overlap in the first direction X.

[0053] The spacing between two light-emitting devices 20 in the same light-emitting unit 02 is usually relatively close. The relative parts between the two light-emitting devices 20 can form a narrow channel, which is likely to induce the capillary siphon effect. For this reason, in the embodiment of the present application, by making two adjacent light-emitting devices 20 only partially overlap in the first direction X, the risk of the capillary siphon effect occurring in the relative region between the two light-emitting devices 20 is reduced, and the light-absorbing material climbing upward due to the above-mentioned capillary siphon effect is reduced.

[0054] Figure 10 It is a top view schematic diagram of a partial structure of a display panel provided by the present application.

[0055] In an embodiment of the present application, as Figure 10 shown, the light-emitting device 20 extends along the second direction Y, and the second direction Y intersects with the first direction X.

[0056] The first light-emitting device 20a is adjacent to the second light-emitting device 20b in the first direction X.

[0057] The first light-emitting device 20a includes a first portion 20a1 and a second portion 20a2. Along the first direction X, the first portion 20a1 overlaps with the second light-emitting device 20b, and the second portion 20a2 does not overlap with the second light-emitting device 20b. At this time, the degree to which the light-absorbing material climbs on the side walls (including the side facing the second light-emitting device 20b) of the portion of the light-emitting body 201 corresponding to the second portion 20a2 can be stronger than the degree to which the light-absorbing material climbs on the side walls (including the side facing the second light-emitting device 20b) of the portion of the light-emitting body 201 corresponding to the first portion 20a1. The reason is that the capillary siphon effect is more easily induced between the first portion 20a1 and the second light-emitting device 20b, and the climbing difficulty of the light-absorbing material between the first portion 20a1 and the second light-emitting device 20b is lower.

[0058] Among them, the length L1 of the first portion 20a1 in the second direction Y is less than the length L2 of the second portion 20a2 in the second direction Y.

[0059] In the embodiment of the present application, by setting L1 < L2, the overlapping area of the first light-emitting device 20a and the second light-emitting device 20b in the first direction X can be relatively small, and the area where the light-absorbing material is likely to climb on the side wall of the first light-emitting device 20a is also small. That is, this setting method helps to reduce the risk of the light-absorbing material climbing on the side of the first light-emitting device 20a facing the adjacent light-emitting device 20.

[0060] Figure 11 It is a top view schematic diagram of a partial structure of a display panel provided by the present application.

[0061] In an embodiment of the present application, as Figure 11 shown, the same light-emitting unit 02 further includes a third light-emitting device 20c. The third light-emitting device 20c is adjacent to the second light-emitting device 20b, and the second light-emitting device 20b is located between the first light-emitting device 20a and the third light-emitting device 20c.

[0062] Along the first direction X, a third portion 20b1 on the second light-emitting device 20b does not overlap with the third light-emitting device 20c, and a fourth portion 20b2 on the second light-emitting device 20b overlaps with the third light-emitting device 20c. At this time, the degree to which the light-absorbing material climbs on the side walls (including the side facing the third light-emitting device 20c) of the portion of the light-emitting body 201 corresponding to the fourth portion 20b2 can be stronger than the degree to which the light-absorbing material climbs on the side walls (including the side facing the third light-emitting device 20c) of the portion of the light-emitting body 201 corresponding to the third portion 20b1. The reason is that the capillary siphon effect is more easily induced between the fourth portion 20b2 and the third light-emitting device 20c, and the climbing difficulty of the light-absorbing material between the fourth portion 20b2 and the third light-emitting device 20c is lower.

[0063] Among them, the length L1 of the first part 20a1 in the second direction Y is less than the length L3 of the fourth part 20b2 in the second direction Y.

[0064] In the embodiment of the present application, since L1 < L3, the side wall length of the part corresponding to the first part 20a1 on the first light-emitting device 20a is smaller than the side wall length of the part corresponding to the fourth part 20b2 on the second light-emitting device 20b. Therefore, compared with the case where the light-absorbing material climbs on the side wall of the fourth part 20b2, the risk of the light-absorbing material climbing on the side wall of the first part 20a1 is lower. That is, the setting method of the embodiment of the present application helps to minimize the risk that the light-absorbing material climbs to the first light-emitting surface 01s in the relative area between the first part 20a1 and the second light-emitting device 20b among the relative areas of adjacent light-emitting devices 20 in the same light-emitting unit 02.

[0065] Figure 12 It is a top view schematic diagram of a partial structure of a display panel provided by the present application.

[0066] In a possible implementation manner, as Figure 12 shown, along the first direction X, in the same light-emitting unit 02, the distance between the first light-emitting device 20a and the second light-emitting device 20b is L4, and the distance between the second light-emitting device 20b and the third light-emitting device 20c is L5, where L4 > L5. In this implementation manner, compared with the distance between the fourth part 20b2 and the third light-emitting device 20c, the distance between the first part 20a1 and the second light-emitting device 20b is larger, so the probability of the occurrence of capillary siphon phenomenon between the first part 20a1 and the second light-emitting device 20b is smaller. That is, the degree to which the light-absorbing material climbs to the part corresponding to the first part 20a1 on the first light-emitting surface 01s is weaker. This setting method helps to offset the difference in the coverage degrees of the light-absorbing material corresponding to different light-emitting devices 20 caused by the above-mentioned H1 < H2.

[0067] In an embodiment of the present application, the light-emitting color of the first light-emitting device 20a is red, and the light-emitting colors of the second light-emitting device 20b and the third light-emitting device 20c are blue and green respectively.

[0068] For the foregoing reasons, the surface of the red light-emitting device facing away from the array substrate 01 is closer to the array substrate 01 than that of the blue / green light-emitting device. Therefore, by providing the first groove 04 in the embodiment of the present application, it helps to reduce the degree to which the first light-emitting surface 01s of the first light-emitting device 20a is covered by the light-absorbing material, which is beneficial to achieving the same or similar light-emitting amounts corresponding to different color light-emitting devices 20, and further improving the brightness uniformity of different regions on the display screen.

[0069] Figure 13 A top view schematic diagram of a partial structure of a display panel provided by the present application Figure 14 is Figure 13 a schematic cross-sectional view of the shown display panel along the section line BB'.

[0070] In an embodiment of the present application, in combination with Figure 13 and Figure 14 , the surface of the second light-emitting device 20b facing away from the array substrate 01 includes a third region 2013 and a fourth region 2014, and the third region 2013 at least partially surrounds the fourth region 2014. During the preparation process of the above-mentioned light-absorbing structure 03, if there is light-absorbing material climbing onto the above-mentioned second light-emitting surface 02s (the surface of the light-emitting body 201 of the second light-emitting device 20b facing away from the array substrate 01), this part of the light-absorbing material can preferentially diffuse into the third region 2013 before diffusing into the fourth region 2014.

[0071] Wherein, a third groove 07 is provided on one side of the second light-emitting device 20b facing away from the array substrate 01, and along the direction perpendicular to the plane where the display panel 10 is located, the third groove 07 overlaps with the third region 2013.

[0072] In an embodiment of the present application, the third groove 07 can be used to accommodate the light-absorbing material climbing onto the above-mentioned second light-emitting surface 02s. When there is light-absorbing material climbing onto the above-mentioned second light-emitting surface 02s, this part of the light-absorbing material can preferentially fill into the third groove 07. That is, the third groove 07 can prevent the further diffusion of the light-absorbing material on the above-mentioned second light-emitting surface 02s, thereby restricting the area covered by the light-absorbing material on the second light-emitting surface 02s and improving the problem of insufficient light output caused by a large coverage area of the light-absorbing material on the second light-emitting surface 02s.

[0073] Figure 15 is Figure 13 another schematic cross-sectional view of the shown display panel along the section line BB'.

[0074] In an embodiment of the present application, in combination with Figure 13 and Figure 15 , the volume of the first groove 04 is larger than the volume of the third groove 07.

[0075] In the embodiment of the present application, the volume of the first groove 04 is larger than that of the third groove 07, which means that, relative to the third groove 07, the amount of light-absorbing material that the first groove 04 can accommodate is larger. Considering that H1 < H2, that is, the difficulty for the light-absorbing material to climb to the first light-emitting surface 01s is less than the difficulty for the light-absorbing material to climb to the second light-emitting surface 02s, the setting method of this embodiment helps to make the difficulty for the light-absorbing material to diffuse on the first light-emitting surface 01s greater than the difficulty for the light-absorbing material to diffuse on the second light-emitting surface 02s (the reason is that the first groove 04 has a stronger hindrance to the diffusion process of the light-absorbing material), which helps to improve the difference between the coverage area of the light-absorbing material on the first light-emitting surface 01s and the coverage area of the light-absorbing material on the second light-emitting surface 02s.

[0076] In an embodiment of the present application, as Figure 3 shown, the width of the first region 2011 is W, satisfying: W ≥ 3 um.

[0077] As the region on the first light-emitting surface 01s that is more easily covered by the light-absorbing material, the first groove 04 needs to be provided on the first region 2011 (or the first groove 04 and the first region 2011 need to overlap), and thus the width of the first region 2011 needs to be limited. Therefore, by limiting W ≥ 3 um in this embodiment, it helps to meet the setting requirements of the first groove 04. In addition, the larger W is, the more the number of the first grooves 04 that can be provided on the first region 2011, and the greater the difficulty for the light-absorbing material to diffuse to the second region 2012.

[0078] Figure 16 It is a schematic diagram of a display device provided by the present application.

[0079] The present application provides a display device 20, as Figure 16 shown, the display device 20 includes the display panel 10 provided in the above embodiment. The display device 20 can be a mobile phone. In addition, the display device 20 can also be an electronic device such as a computer or a television.

[0080] The problem of uneven brightness that appears on the corresponding display screen when the display device 20 provided in the embodiment of the present application is working has been greatly improved.

[0081] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. In particular, for the device embodiments and the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A display panel, characterized in that: include: An array substrate; A plurality of light-emitting units arranged in an array, wherein each of the light-emitting units comprises a plurality of light-emitting devices; The plurality of light emitting devices include a first light emitting device and a second light emitting device, wherein the surface of the first light emitting device facing away from the array substrate is closer to the array substrate than the surface of the second light emitting device facing away from the array substrate; The surface of the first light emitting device facing away from the array substrate includes a first area and a second area, and the first area at least partially surrounds the second area; A first groove is provided on a side of the first light emitting device facing away from the array substrate, and the first groove overlaps with the first region along a direction perpendicular to the plane where the display panel is located.

2. The display panel according to claim 1, characterized in that: The first groove is disposed on a portion of the surface of the first light emitting device facing away from the array substrate and corresponding to the first area.

3. The display panel according to claim 1, characterized in that: A side of the first light emitting device facing away from the array substrate is covered with a filling layer, and a side of the filling layer facing away from the light emitting device is provided with the first groove.

4. The display panel according to claim 3, characterized in that: The second area is provided with a second groove; Wherein, part of the filling layer is located in the second groove.

5. The display panel according to claim 1, characterized in that: The second region is provided with a second groove, and a width w2 of the second groove is less than or equal to a width w1 of the first groove.

6. The display panel according to claim 5, characterized in that: The depth h1 of the first groove is greater than the depth h2 of the second groove.

7. The display panel according to claim 1, characterized in that: The width w1 of the first groove satisfies: w1 ≥ 0.5 um.

8. The display panel according to claim 1, characterized in that: The distance Δw between two adjacent first grooves satisfies: Δw≥0.3 um.

9. The display panel according to claim 1, characterized in that: For the light-emitting devices in the same light-emitting unit, two adjacent light-emitting devices are arranged along a first direction and partially overlap in the first direction.

10. The display panel according to claim 9, characterized in that: The light emitting device extends along a second direction, and the second direction intersects the first direction; The first light emitting device is adjacent to the second light emitting device in the first direction; The first light emitting device includes a first portion and a second portion; along the first direction, the first portion overlaps with the second light emitting device and the second portion does not overlap with the second light emitting device; Wherein, a length of the first portion in the second direction is smaller than a length of the second portion in the second direction.

11. The display panel according to claim 10, characterized in that: The same light-emitting unit also includes a third light-emitting device, the third light-emitting device is adjacent to the second light-emitting device and the second light-emitting device is located between the first light-emitting device and the third light-emitting device; along the first direction, a third portion on the second light-emitting device does not overlap with the third light-emitting device and a fourth portion on the second light-emitting device overlaps with the third light-emitting device; Wherein, the length of the first portion in the second direction is smaller than the length of the fourth portion in the second direction.

12. The display panel according to claim 11, characterized in that: The light emitting color of the first light emitting device is red, and the light emitting colors of the second light emitting device and the third light emitting device are blue and green respectively.

13. The display panel according to claim 1, characterized in that: The surface of the second light emitting device facing away from the array substrate includes a third area and a fourth area, and the third area at least partially surrounds the fourth area; A third groove is provided on a side of the second light emitting device facing away from the array substrate, and the third groove overlaps with the third region along a direction perpendicular to the plane where the display panel is located.

14. The display panel according to claim 13, characterized in that: The volume of the first groove is greater than the volume of the third groove.

15. The display panel according to claim 1, characterized in that: The width W of the first region satisfies: W≥3 um.

16. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-15.

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