A display panel and display device

Abstract

This invention discloses a display panel, its fabrication method, and a display device. The display panel includes a driving substrate; light-emitting elements located on one side of the driving substrate and electrically connected to the driving substrate; and a light-shielding barrier located on one side of the driving substrate and between two adjacent light-emitting elements. The light-shielding barrier includes a first surface closer to the driving substrate and a second surface farther from the driving substrate, wherein, along the thickness direction of the display panel, the coverage area of ​​the second surface is larger than that of the first surface. Thus, by setting the coverage area of ​​the second surface to be larger than that of the first surface, more external light is absorbed through the larger second surface, reducing interference from external light on the light emitted by the display panel. Simultaneously, setting the coverage area of ​​the first surface to be smaller than that of the second surface allows for more space to be reserved for the light-emitting elements, reducing fabrication difficulty and facilitating the placement of a larger number of light-emitting elements in the display panel, thereby improving display resolution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Display technology is widely used in television, mobile phone and public information display, and display panels for displaying pictures are various, and can display colorful pictures.

[0003] However, the existing display panel causes interference to the normal light emission of the display panel due to the reflection of external light on the surface of the display panel or in the display panel, which affects the display effect of the display panel. SUMMARY

[0004] Embodiments of the present application provide a display panel and a display device to solve the problem of interference of external light to the normal light emission of the display panel in the prior art, and improve the display effect of the display panel.

[0005] In a first aspect, embodiments of the present application provide a display panel, comprising:

[0006] a driving substrate;

[0007] a plurality of light emitting elements located on one side of the driving substrate, the light emitting elements being electrically connected to the driving substrate;

[0008] a light shielding barrier located on one side of the driving substrate and between two adjacent light emitting elements, the light shielding barrier comprising a first surface close to the one side of the driving substrate and a second surface away from the one side of the driving substrate, wherein the coverage area of the second surface is greater than that of the first surface along the thickness direction of the display panel.

[0009] In a second aspect, embodiments of the present application provide a preparation method of a display panel, for preparing the display panel of the first aspect, the preparation method comprising:

[0010] providing a driving substrate;

[0011] preparing a plurality of light emitting elements on one side of the driving substrate;

[0012] preparing a light shielding barrier on one side of the driving substrate and between two adjacent light emitting elements, the light shielding barrier comprising a first surface close to the one side of the driving substrate and a second surface away from the one side of the driving substrate, wherein the coverage area of the second surface is greater than that of the first surface along the thickness direction of the display panel.

[0013] In a third aspect, embodiments of the present application provide a display device comprising the display panel of any one of the first aspect.

[0014] The display panel provided by the embodiment of the present application has a second surface with a larger coverage area than a first surface, so that more external light is absorbed by the larger second surface, reducing the interference of external light on the light emission of the display panel. Meanwhile, the first surface has a smaller coverage area than the second surface, so that a larger space is reserved for the light emitting elements, reducing the difficulty of production, and facilitating the arrangement of more light emitting elements in the display panel, improving the display resolution. In addition, a light blocking wall is arranged between two adjacent light emitting elements, so that the light incident on the light blocking wall is absorbed by the light blocking wall, avoiding the crosstalk between the light emitted by the two adjacent light emitting elements, and improving the display effect of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a display panel provided by the embodiment of the present application;

[0016] Figure 2 is a structural schematic diagram of a display panel provided by the embodiment of the present application; Figure 1 is a sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application;

[0017] Figure 3 is a sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application; Figure 1 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application;

[0018] Figure 4 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application; Figure 1 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application;

[0019] Figure 5 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application; Figure 1 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application;

[0020] Figure 6 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application; Figure 1 is another sectional structural schematic diagram of the display panel along the direction of A-A’ in the embodiment of the present application;

[0021] Figure 7 is a flow example diagram of a preparation method of a display panel provided by the embodiment of the present application;

[0022] Figure 8 is a flow example diagram of another preparation method of a display panel provided by the embodiment of the present application;

[0023] Figure 9 is a structural schematic diagram of a display device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be combined with the accompanying 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 a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0025] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present application, Figure 2 is Figure 1 is a sectional structural schematic diagram along the direction of A-A' of the display panel 10, combined with the display panel 10 shown in Figure 1 and Figure 2 , the display panel 10 provided by the embodiment of the present application comprises a driving substrate 11; a plurality of light emitting elements 12 located at one side of the driving substrate 11, the light emitting elements 12 being electrically connected with the driving substrate 11; a light shielding barrier 13 located at one side of the driving substrate 11 and between two adjacent light emitting elements 12, the light shielding barrier 13 comprising a first surface 131 close to one side of the driving substrate 11 and a second surface 132 away from one side of the driving substrate 11, wherein along the thickness direction of the display panel (for example, the X direction shown in the figure), the coverage area of the second surface 132 is greater than the coverage area of the first surface 131.

[0026] For example, the light emitting elements 12 are arranged at one side of the driving substrate 11 and are electrically connected with the driving substrate 11, the driving substrate 11 is used to provide a driving signal for the light emitting elements 12 to emit light, the driving signal may, for example, comprise an anode signal, a cathode signal and a data signal, so as to ensure that the light emitting elements 12 can normally emit light and display. Optionally, the driving substrate 11 is provided with a driving circuit (not shown in the figure) for driving the light emitting elements 12 to emit light, the driving circuit is electrically connected with the light emitting elements 12 and is used to drive the light emitting elements 12 to emit light. According to different driving modes of the light emitting elements 12, the specific arrangement mode of the driving circuit can be different. Specifically, when the driving mode of the light emitting elements 12 is active driving, the driving circuit can comprise a plurality of thin film transistors, the light emitting elements 12 are driven to emit light through the thin film transistors; when the driving mode of the light emitting elements 12 is passive driving, the driving circuit can comprise a cathode signal line and an anode signal line, the cathode signal and the anode signal required by the light emitting elements 12 to emit light are provided through the cathode signal line and the anode signal line, and the light emitting elements 12 are driven to emit light. The specific arrangement mode of the driving circuit is not described in the embodiment of the present application.

[0027] The light emitting element 12 can include a light emitting diode, which can include a light emitting body 121 and an electrode 122 disposed on a surface of the light emitting body 121, and the light emitting body 121 can further include a P-type semiconductor layer, a light emitting recombination layer and an N-type semiconductor layer, and the electrode 122 can include an anode and a cathode. The anode is electrically connected to the driving substrate and the P-type semiconductor layer, respectively, and is used to provide holes to the P-type semiconductor layer. The cathode is electrically connected to the driving substrate and the N-type semiconductor layer, respectively, and is used to provide electrons to the N-type semiconductor layer. The electrons and holes recombine in the light emitting recombination layer to emit light, realizing normal light emitting display of the light emitting element 12.

[0028] Further, the display panel 10 further includes a light shielding barrier 13 located on one side of the driving substrate 11 and between two adjacent light emitting elements 12. Figure 1 As shown, the light shielding barrier 13 can form a grid-shaped light shielding barrier, for example, and the light emitting element 12 is arranged in the mesh of the grid-shaped light shielding barrier. The light shielding barrier 13 can absorb light incident thereon, and can avoid the crosstalk problem between the light emitted by the two adjacent light emitting elements 12, thereby improving the display effect of the display panel. Further, as shown, Figure 2 The light shielding barrier 13 includes a first surface 131 close to one side of the driving substrate 11 and a second surface 132 away from one side of the driving substrate 11, and the coverage area of the second surface 132 is greater than that of the first surface 131 along the thickness direction (X direction shown in the figure) of the display panel 10. In this way, the larger area of the second surface 132 can absorb more external light, reducing the interference of the light emitted by the display panel after reflection of the external light on the display panel, thereby improving the display effect of the display panel. At the same time, since the coverage area of the first surface 131 is smaller than that of the second surface 132, the smaller area of the first surface 131 provides a larger setting space for the light emitting element, which is conducive to reducing the preparation difficulty, and is conducive to arranging a larger number of light emitting elements in the display panel, thereby improving the display resolution.

[0029] It should be noted that the embodiments of the present application can also include other structures required to ensure normal operation of the display panel, which will not be described here.

[0030] In summary, the display panel provided by the embodiment of the present application has the following advantages: by setting the covering area of the second surface to be larger than the covering area of the first surface, more external light can be absorbed by the larger second surface, thereby reducing the light interference of the external light on the display panel; meanwhile, the covering area of the first surface is set to be smaller than the covering area of the second surface, which can reserve a larger setting space for the light emitting elements, thereby reducing the manufacturing difficulty, and is conducive to setting a larger number of light emitting elements in the display panel and improving the display resolution; and by setting the light shielding barrier wall between the two adjacent light emitting elements, the light incident on the light shielding barrier wall can be absorbed by the light shielding barrier wall, thereby avoiding the crosstalk problem between the light emitted by the two adjacent light emitting elements, and improving the display effect of the display panel.

[0031] On the basis of the above-mentioned embodiment, with reference to Figure 2 As Figure 3 shown, along the thickness direction (X direction shown in the figure) of the display panel, the covering area of the light shielding barrier wall 13 gradually increases.

[0032] It can be understood that the covering area of the light shielding barrier wall 13 gradually increases along the thickness direction of the display panel, which can make the covering area of the second surface 132 larger than the area of the first surface 131. In addition, the light shielding barrier wall 13 gradually changes in size in structure, which makes the structure of the light shielding barrier wall 13 regular, the manufacturing process simple, and the space saved, thereby reserving a larger setting space for the light emitting elements.

[0033] As a feasible implementation manner, Figure 1 is Figure 3 another cross-sectional structure schematic view along the A-A' direction, as Figure 3 shown, the display panel 10 further includes a first reflection structure 14, the first reflection structure 14 includes a first reflection part 141 and a reflection opening 142, the first reflection part 141 is arranged around the reflection opening 142; the first reflection part 141 is arranged between the light emitting element 12 and the light shielding barrier wall 13; the light emitting element 12 includes a first light emitting surface 123 away from the driving substrate 11 side, along the thickness direction (X direction shown in the figure) of the display panel 10, the reflection opening 142 covers the first light emitting surface 123.

[0034] For example, the first reflection structure 14 includes the first reflection part 141 and the reflection opening 142, wherein the first reflection part 141 is arranged between the light emitting element 12 and the light shielding barrier wall 13, and the first reflection part 141 is arranged around the reflection opening 142, so that at least part of the light emitted by the light emitting element 142 is reflected by the first reflection part 141 and then emitted through the reflection opening 142.

[0035] Specifically, the light shielding barrier 13 is arranged between two adjacent light emitting elements 12, which can avoid the crosstalk between the light emitting elements 12, but the light shielding barrier 13 will absorb the light emitted by the side light emitting surface of the light emitting element 12, so that the arrangement of the light shielding barrier 13 will have a negative impact on the light emitting efficiency of the light emitting element 12, which will reduce the light emitting efficiency of the light emitting element 12. To this end, the first reflection structure 14 is arranged to make the light originally emitted by the light emitting element 12 to the light shielding barrier 13 reflected by the first reflection part 141 and then emitted through the reflection opening 142, which can avoid the crosstalk between the light emitting elements 12 and reduce the absorption of the light shielding barrier 13 to the light, thereby increasing the light emitting efficiency of the light emitting element 12.

[0036] Further, the light emitting element 12 further includes a first light emitting surface 123 away from the driving substrate, and the reflection opening 142 covers the first light emitting surface 123 along the thickness direction (X direction shown in the figure) of the display panel 10, so that the light emitted by the first light emitting surface 123 can be emitted through the reflection opening 142, thereby ensuring the normal emission of the light of the light emitting element 12.

[0037] Based on the above embodiment, further referring to Figure 3 , the first reflection part 141 includes a first end part 1411 away from the driving substrate 11, and the distance between the first end part 1411 and the driving substrate 11 along the thickness direction (X direction shown in the figure) of the display panel 10 is greater than or equal to the distance between the first light emitting surface 123 and the driving substrate 11.

[0038] Specifically, the distance between the first end part 1411 at the uppermost end of the first reflection part 141 and the driving substrate 11 is greater than or equal to the distance between the first light emitting surface 123 and the driving substrate 11, that is, the height of the first reflection part 141 is greater than the height of the side light emitting surface of the light emitting element 12, so that the light emitted by the side light emitting surface of the light emitting element 12 can be incident on the first reflection part 141 and then reflected by the first reflection part 141 and emitted from the reflection opening 142, thereby improving the light emitting efficiency of the light emitting element 12 and improving the display effect of the display panel.

[0039] Optionally, further referring to Figure 3 , the height of the first reflection part 141 is the same as the height of the light shielding barrier 13 along the thickness direction (X direction shown in the figure) of the display panel 10.

[0040] It can be understood that if the height of the first reflecting part 141 is lower than the height of the light shielding wall 13, that is, the first reflecting part 141 exposes part of the light shielding wall 13, which will cause part of the light emitted by the light emitting element 12 side light emitting surface to be absorbed by the part of the light shielding wall, affecting the light emitting efficiency of the light emitting element 12; if the height of the first reflecting part 141 is higher than the height of the light shielding wall 13, part of the external light will be reflected by the first reflecting part 141, thereby interfering with the light emission of the light emitting element 12, therefore, in the embodiment, the height of the first reflecting part 141 is set to be the same as the height of the light shielding wall 13, which can ensure that the light emitted by the light emitting element 12 side light emitting surface is reflected by the first reflecting part 141 and then emitted from the reflecting opening 142, thereby improving the light emitting efficiency of the light emitting element 12; and can reduce the reflection of external environment light and improve the display effect of the display panel.

[0041] Optionally, continue to participate Figure 4 As shown, the light shielding wall 13 includes a wall side wall 133 close to the side of the light emitting element 12, and the first reflecting part 141 is arranged in close contact with the wall side wall 133.

[0042] Specifically, the first reflecting structure 14 includes a first reflecting part 141, and the light shielding wall 13 includes a wall side wall 133 close to the side of the light emitting element 12. The first reflecting part 141 is arranged in close contact with the wall side wall 133, that is, the first reflecting part 141 is arranged on the surface of the wall side wall 133. In this way, on the one hand, the first reflecting part 141 is not suspended, and the structure of the first reflecting part 141 is stable. At the same time, the close arrangement of the first reflecting part 141 and the wall side wall 133 can minimize the gap distance between the first reflecting part 141 and the wall side wall 133, which is beneficial to improve the space utilization rate. The saved space can be used to arrange more light emitting elements, which is beneficial to realize a high-resolution display panel.

[0043] On the basis of the above embodiment, Figure 1 is Figure 5 is another cross-sectional structure schematic view along the A-A' direction in the embodiment, Figure 1 is Figure 4 is another cross-sectional structure schematic view along the A-A' direction in the embodiment, as Figure 5 and Figure 4 As shown in

[0044] For example, as Figure 5 and Figure 4As shown, the display panel provided by the embodiment of the present application can further include a light adjusting structure 15, which is at least partially located at the light emitting side of the light emitting element 12, and is used to adjust the exit angle of the light emitted by the light emitting element 12, so as to ensure that the light is emitted towards the light emitting side of the display panel after passing through the light adjusting structure 15, and ensure the display effect of the display panel. Specifically, the light adjusting structure 15 includes a first adjusting structure 151 and a second adjusting structure 152 which are sequentially arranged on the light emitting path. The light emitted by the light emitting side of the light emitting element 12 propagates in the first adjusting structure 151, and is reflected by the first reflecting part 141, and then is incident into the second adjusting structure 152 from the interface between the first adjusting structure 151 and the second adjusting structure 152. The refractive index of the first adjusting structure 151 is different from that of the second adjusting structure 152. Therefore, the light is refracted at the interface between the first adjusting structure 151 and the second adjusting structure 152. Since the refractive index of the second adjusting structure 152 is greater than that of the first adjusting structure 151, and the refracted light is deflected towards the normal direction when the light is incident from a medium with a small refractive index to a medium with a large refractive index, the refraction angle is smaller than the incident angle. Therefore, the light converges towards the middle at the interface between the first adjusting structure 151 and the second adjusting structure 152, and the exit angle of the light emitted by the light emitting element 12 is adjusted by the light adjusting structure 15, so as to improve the display effect of the display panel.

[0045] Optionally, with reference to Figure 5 and Figure 4 As shown, at least the first adjusting structure 151 covers the light emitting element 12, so that the forward light emission and the lateral light emission of the light emitting element 12 can be adjusted, and the light emitting angle of the light emitting element is ensured. Further, at least the first light adjusting structure 151 covers and protects the light emitting element 12, so that the structure of the light emitting element 12 is stable, and the light emitting element 12 can work normally. Optionally, with reference to Figure 5 and Figure 4 As shown, the display panel 10 further includes a first reflecting structure 14, which includes a first reflecting part 141 and a reflecting opening 142. The first reflecting part 141 is arranged between the first adjusting structure 151 and the light shielding barrier 13. The second adjusting structure 152 is arranged corresponding to the reflecting opening 142.

[0046] It can be understood that the first reflecting part 141 is arranged between the first adjusting structure 151 and the light shielding barrier 13, and is used to reflect the light emitted by the light emitting element 12 towards the light shielding barrier 13, and then the light is incident into the second adjusting structure 152 through the reflecting opening 142. Therefore, by arranging the second adjusting structure 152 corresponding to the reflecting opening 142, the arrangement is simple, and the light reflected to the reflecting opening 142 can be adjusted by the second adjusting structure 152 to adjust the exit angle of the light emitted by the light emitting element 12, so that the light converges towards the middle, and the display effect is improved.

[0047] Further, when the first adjusting structure 151 comprises the light emitting element 12, and the first reflecting part 141 is located between the first adjusting structure 151 and the light shielding barrier 13, the first adjusting structure 151 can also provide a preparation carrier for the first reflecting part 141, i.e. by preparing the first reflecting part 141 on the first adjusting structure 151, such as depositing or sputtering the material of the first reflecting part 141 on the surface of the first adjusting structure 151, so that an additional preparation carrier for the first reflecting part 141 is not needed, and the preparation process of the first reflecting part 141 is simple.

[0048] It should be noted that the second adjusting structure 152 is arranged corresponding to the reflecting opening 142, and it can be understood that the second adjusting structure 152 is arranged at least above the reflecting opening 142. Specifically, as shown in Figure 5 Or Figure 4 The second adjusting structure 152 is located on the side of the first adjusting structure 151 away from the driving substrate 11; or, in other embodiments, the second adjusting structure 152 can also wrap the first adjusting structure 151, i.e. the light adjusting structure 15 wraps the light emitting element 12 as a whole, and the specific arrangement mode of the second adjusting structure 152 is not limited in the embodiments of the present application, and can be arranged according to the actual needs of the display panel and the manufacturing method thereof, which is not limited in the embodiments of the present application.

[0049] Optionally, continuing to refer to Figure 5 And Figure 4 The first adjusting structure 151, the first reflecting part 141 and the light shielding barrier 13 are sequentially attached, which on the one hand ensures the structural stability of the first adjusting structure 151, the first reflecting part 141 and the light shielding barrier 13; and on the other hand, the sequential attachment of the first adjusting structure 151, the first reflecting part 141 and the light shielding barrier 13 can also minimize the gap distance between the first adjusting structure 151 and the first reflecting part 141, and the gap distance between the first reflecting part 141 and the side wall 133 of the barrier, which is beneficial to improve the space utilization rate, and the saved space can be used to arrange more light emitting elements, which is beneficial to realize a high-resolution display panel.

[0050] On the basis of the above-mentioned embodiments, continuing to refer to Figure 5 And Figure 6 The cross-sectional shape of the first adjusting structure 151 comprises an arc or a trapezoid.

[0051] Specifically, Figure 1 Taking the cross-sectional shape of the first adjusting structure 151 as a trapezoid as an example, Figure 6 Taking the cross-sectional shape of the first adjusting structure 151 as an arc as an example. Arranging the cross-sectional shape of the first adjusting structure 151 to comprise an arc or a trapezoid can ensure that the first adjusting structure 151 is simple in structure and easy to prepare.

[0052] As a feasible implementation, Figure 6 is Figure 6 Another cross-sectional structure diagram of the display panel 10 along the direction of A-A' is shown in FIG. 2B. As shown in FIG. 2B, the display panel 10 further includes a second reflection structure 16 disposed on the side surface of the driving substrate 11 close to the light emitting element 12, and the second reflection structure 16 at least partially overlaps with the second surface 132 along the thickness direction of the display panel 10 (i.e., the X direction shown in the figure). Figure 7 The display panel 10 further includes a second reflection structure 16 disposed on the side surface of the driving substrate 11 close to the light emitting element 12, and the second reflection structure 16 at least partially overlaps with the second surface 132 along the thickness direction of the display panel 10 (i.e., the X direction shown in the figure).

[0053] Specifically, as shown by the light ray propagation path in Figure 7 , the light emitted from the side light emitting surface of the light emitting element 12 is partially reflected by the first reflection part 141 and then emitted from the reflection exit 142; and the light emitted from the lower side of the light emitting element 12 is reflected by the first reflection part 141 and then emitted toward the driving substrate 11, and after being reflected by the second reflection structure 16 disposed on the driving substrate 11, the light is emitted from the reflection opening 142. The second reflection structure 16 in the embodiment can reflect the light reflected by the first reflection part 141 again and then emitted from the reflection opening 142, or directly reflect the light emitted from the light emitting element 12 and then emitted from the reflection opening 142 after being reflected by the first reflection part 141, thereby further improving the light emitting efficiency of the light emitting element 12.

[0054] Optionally, continuing to refer to Figure 8 , the light emitting element 12 includes an electrode 122, the driving substrate 11 includes a connection electrode 111, the connection electrode 111 is electrically connected with the electrode 122, and the second reflection structure 16 is disposed in the same layer as the connection electrode 111.

[0055] For example, the driving substrate 11 is configured to provide a driving signal for the light emitting element 12 to emit light, and the driving signal can include an anode signal, a cathode signal, and a data signal, so that the light emitting element 12 can normally emit light and display. Specifically, the driving substrate 11 includes a connection electrode 111, the light emitting element 12 includes an electrode 122, the connection electrode 111 is electrically connected with the electrode 122, and the connection electrode 111 provides the driving signal to the light emitting element 12 based on the connection relationship.

[0056] In addition, the second reflection structure 16 and the connection electrode 111 can be disposed in the same layer, so that the film layer structure of the display panel is simple; and the second reflection structure 16 and the connection electrode 111 can be prepared in the same process, thereby reducing the process flow and ensuring that the preparation process of the display panel is simple.

[0057] On the basis of the above-mentioned embodiments, the light emitting element can include a micro light emitting element, such as a micro-LED, which has a small volume and a high spatial integration degree, is convenient for realizing a high-resolution display panel, and ensures that the display effect of the display panel is good.

[0058] Based on the same inventive concept, the embodiment of the present application also provides a preparation method of the display panel. Figure 8 is a flow diagram of a preparation method of a display panel provided by an embodiment of the present application, as shown in the figure, the preparation method of the display panel provided by the embodiment of the present application comprises: Figure 9

[0059] S110, providing a driving substrate.

[0060] The driving substrate is provided with a driving circuit for driving the light-emitting element to emit light. The driving circuit is electrically connected with the light-emitting element and is used for driving the light-emitting element to emit light. Optionally, the driving substrate is provided with a driving circuit for driving the light-emitting element to emit light. According to different driving modes of the light-emitting element, the specific setting mode of the driving circuit can be different. Specifically, when the driving mode of the light-emitting element is active driving, the driving circuit can include a plurality of thin film transistors, and the light-emitting element is driven to emit light by the thin film transistors; when the driving mode of the light-emitting element is passive driving, the driving circuit can include a cathode signal line and an anode signal line, and the light-emitting element is driven to emit light by the cathode signal and the anode signal required by the light-emitting element through the cathode signal line and the anode signal line. The specific setting mode of the driving circuit is not described in the embodiment of the present application.

[0061] S120, preparing a plurality of light-emitting elements on one side of the driving substrate.

[0062] The light-emitting element can include a light-emitting diode, and the plurality of light-emitting elements can be prepared on one side of the driving substrate by transfer, for example, the plurality of light-emitting elements can be transferred by a pick-up head pickup method, or transferred by a hydrodynamic method, or transferred by a mechanical method, and the specific transfer method is not limited in the embodiment of the present application. Alternatively, the plurality of light-emitting elements can be directly prepared on one side of the driving substrate by directly depositing a semiconductor layer and a light-emitting composite layer on one side of the driving substrate, and the preparation process of the light-emitting element is not limited in the embodiment of the present application.

[0063] S130, preparing a light-shielding dam on one side of the driving substrate and between two adjacent light-emitting elements.

[0064] The light-shielding dam includes a first surface close to the driving substrate side and a second surface away from the driving substrate side, and the coverage area of the second surface is greater than that of the first surface in the thickness direction of the display panel.

[0065] ​Specifically, the light shielding barrier wall can be a black light shielding material. By arranging the light shielding barrier wall between the two adjacent light emitting elements, the light shielding barrier wall can absorb the light incident on the light shielding barrier wall, thereby avoiding the crosstalk problem between the light emitted by the two adjacent light emitting elements, and improving the display effect of the display panel.

[0066] Further, the coverage area of the second surface of the light shielding barrier wall is greater than the coverage area of the first surface. The larger second surface can absorb more external light, thereby reducing the interference of the external light on the light emitted by the display panel. Meanwhile, the coverage area of the first surface is arranged to be smaller than the coverage area of the second surface, so as to reserve a larger setting space for the light emitting element, thereby facilitating the reduction of the preparation difficulty, and being conducive to arranging a larger number of light emitting elements in the display panel and improving the display resolution.

[0067] In summary, the preparation method of the display panel provided in the embodiments of the present application can be used to prepare a light shielding barrier wall between the two adjacent light emitting elements on the side of the driving substrate. The coverage area of the second surface of the light shielding barrier wall is greater than the coverage area of the first surface. The larger second surface can absorb more external light, thereby reducing the interference of the external light on the light emitted by the display panel. Meanwhile, the coverage area of the first surface is arranged to be smaller than the coverage area of the second surface, so as to reserve a larger setting space for the light emitting element, thereby facilitating the reduction of the preparation difficulty, and being conducive to arranging a larger number of light emitting elements in the display panel and improving the display resolution. Furthermore, by arranging the light shielding barrier wall between the two adjacent light emitting elements, the light shielding barrier wall can absorb the light incident on the light shielding barrier wall, thereby avoiding the crosstalk problem between the light emitted by the two adjacent light emitting elements, and improving the display effect of the display panel.

[0068] On the basis of the above embodiments, Figure 9 is a flowchart of another preparation method of a display panel provided in the embodiments of the present application. Specifically, how to prepare the first reflection structure is explained on the basis of the above embodiments. As shown in ​ the preparation method of the display panel provided in the embodiments of the present application comprises the following steps.

[0069] S210, providing a driving substrate.

[0070] S220, preparing a plurality of light emitting elements on one side of the driving substrate.

[0071] S230, preparing a light adjusting structure.

[0072] The light adjusting structure comprises a first adjusting structure and a second adjusting structure arranged in sequence on the light emitting path. The refractive index of the second adjusting structure is greater than the refractive index of the first adjusting structure.

[0073] Exemplarily, the light adjusting structure is located at least partially on a light emitting side of the light emitting element, and is configured to adjust an exit angle of the light emitted by the light emitting element, so that the light is emitted towards the light emitting side of the display panel after passing through the light adjusting structure, and the display effect of the display panel is ensured.

[0074] In S240, a first reflective layer is prepared on the surface of the light adjusting structure, and the first reflective layer covers the light adjusting structure.

[0075] In S250, a light shielding barrier is prepared between two adjacent light adjusting structures, the light shielding barrier covers part of the first reflective layer, and the first reflective layer is etched based on the light shielding barrier to obtain a first reflective structure.

[0076] Specifically, the light adjusting structure is used as a preparation carrier of the first reflective layer, and the first reflective layer is obtained by directly depositing or sputtering a reflective layer material such as a metal material in the light adjusting structure, so that a preparation carrier of the first reflective layer does not need to be provided separately, and the first reflective layer preparation process is simple. Further, the light shielding barrier is used as an etching barrier of the first reflective structure, part of the first reflective layer exposed by the light shielding barrier is etched to form a reflective opening in the first reflective structure, and part of the first reflective layer covered by the light shielding barrier forms a first reflective part, so that one photolithography process can be saved when etching the first reflective layer, the process flow is reduced, the preparation efficiency is improved, and the preparation cost is saved.

[0077] It should be noted that the present embodiment does not limit the specific sequence of steps S220 and S230, that is, the light emitting element can be prepared first, and the light adjusting structure can be prepared in the gap of the light emitting element, or the light adjusting structure can be prepared first, and the light emitting element can be prepared in the gap of the light adjusting structure.

[0078] Based on the same inventive concept, the present embodiment also provides a display device, ​ is a structural schematic diagram of a display device provided by the present embodiment, as ​ shown, the display device 1 includes the display panel 10 described in any of the above embodiments, and therefore, the display device 1 provided by the present embodiment has the corresponding beneficial effects in the above embodiments, which will not be described here. Exemplarily, the display device 1 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 display device 1.

[0079] 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 in that, include: Drive substrate; A plurality of light-emitting elements are located on one side of the driving substrate, and the light-emitting elements are electrically connected to the driving substrate; A light-shielding barrier is located on one side of the driving substrate and between two adjacent light-emitting elements. The light-shielding barrier includes a first surface close to the driving substrate and a second surface away from the driving substrate, wherein, along the thickness direction of the display panel, the coverage area of ​​the second surface is greater than the coverage area of ​​the first surface. The display panel further includes a light adjustment structure, which is at least partially located on the light-emitting side of the light-emitting element. The light adjustment structure is used to adjust the emission angle of the light emitted by the light-emitting element. The light adjustment structure includes a first adjustment structure and a second adjustment structure sequentially disposed on the propagation path of the emitted light, wherein the refractive index of the second adjustment structure is greater than the refractive index of the first adjustment structure. The display panel further includes a first reflective structure, which includes a first reflective part and a reflective opening. The first reflective part is disposed between the first adjustment structure and the light-shielding barrier. The second adjustment structure is provided corresponding to the reflection opening; The light adjustment structure completely covers the light-emitting element; the first adjustment structure, the first reflective part, and the light-shielding barrier are sequentially attached to each other.

2. The display panel according to claim 1, characterized in that, Along the thickness direction of the display panel, the coverage area of ​​the light-shielding barrier gradually increases.

3. The display panel according to claim 1, characterized in that, The display panel further includes a first reflective structure, the first reflective structure including a first reflective part and a reflective opening, the first reflective part being disposed around the reflective opening; The first reflective part is disposed between the light-emitting element and the light-shielding barrier; The light-emitting element includes a first light-emitting surface on the side away from the driving substrate, and the reflective opening covers the first light-emitting surface along the thickness direction of the display panel.

4. The display panel according to claim 3, characterized in that, The first reflective portion includes a first end portion on the side away from the driving substrate; Along the thickness direction of the display panel, the distance between the first end and the driving substrate is greater than or equal to the distance between the first light-emitting surface and the driving substrate.

5. The display panel according to claim 3, characterized in that, Along the thickness direction of the display panel, the height of the first reflective portion is the same as the height of the light-shielding barrier.

6. The display panel according to claim 3, characterized in that, The light-shielding barrier includes a barrier sidewall near the light-emitting element; The first reflective part is fitted to the side wall of the retaining wall.

7. The display panel according to claim 1, characterized in that, At least the first adjustment structure covers the light-emitting element.

8. The display panel according to claim 7, characterized in that, The cross-sectional shape of the first adjustment structure includes an arc shape or a trapezoidal shape.

9. The display panel according to claim 1, characterized in that, The display panel further includes a second reflective structure, which is disposed on the side surface of the driving substrate near the light-emitting element; Along the thickness direction of the display panel, the second reflective structure at least partially overlaps with the second surface.

10. The display panel according to claim 9, characterized in that, The light-emitting element includes electrodes; The driving substrate includes a connecting electrode, and the connecting electrode is electrically connected to the electrode. The second reflective structure is disposed in the same layer as the connecting electrode.

11. The display panel according to claim 1, characterized in that, The light-emitting element includes a miniature light-emitting diode.

12. A method for manufacturing a display panel, used to manufacture the display panel according to any one of claims 1-11, characterized in that, The preparation method includes: Provide driving substrate; Multiple light-emitting elements are fabricated on one side of the driving substrate; On one side of the driving substrate, and between two adjacent light-emitting elements, a light-shielding barrier is formed. The light-shielding barrier includes a first surface near the driving substrate and a second surface away from the driving substrate, wherein, along the thickness direction of the display panel, the coverage area of ​​the second surface is greater than the coverage area of ​​the first surface. After forming multiple light-emitting elements on one side of the driving substrate, the method further includes: A light adjustment structure is prepared, the light adjustment structure comprising a first adjustment structure and a second adjustment structure sequentially disposed on the propagation path of the emitted light, wherein the refractive index of the second adjustment structure is greater than the refractive index of the first adjustment structure; A first reflective layer is prepared on the surface of the light adjustment structure, and the first reflective layer covers the light adjustment structure; A light-shielding barrier is prepared between two adjacent light-adjusting structures, the light-shielding barrier covering a portion of the first reflective layer; The first reflective layer is etched based on the light-shielding barrier to obtain the first reflective structure.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 1-11.

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