Display panel and mobile terminal

Abstract

Embodiments of the present application disclose a display panel and a mobile terminal. The display panel comprises an anode layer, the anode layer comprising a first anode, a second anode and a third anode; in a pixel opening, recessed structures with reflective sidewalls are arranged on each anode, the area of the first anode is greater than the area of the second anode, the area of the second anode is greater than the area of the third anode, and the proportion of the area of the recessed structure on the first anode to the area of the first anode is successively smaller than the proportion of the area of the recessed structure on the second anode to the area of the second anode and the proportion of the area of the recessed structure on the third anode to the area of the third anode. The lateral light emission of light atoms is reflected by the reflective sidewalls to make the light atoms emit forward, thereby realizing the reuse of lateral light, the recessed structures on the anodes corresponding to different color light emitting devices are arranged differently, the light emission efficiency of the display panel is effectively improved, the light emission is balanced, the display panel has low power consumption, high stability and long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and in particular to a display panel and a mobile terminal. BACKGROUND

[0002] At present, organic electroluminescence display (OLED) occupies the mainstream market in small size mobile phone panels. Unlike the traditional liquid crystal display which emits light by a backlight source, the OLED panel actively emits light by an organic electroluminescence material, and each pixel corresponds to a thin film transistor switch, which is a current-driven display. The terminal of the display screen, such as a mobile phone, a laptop, a car display, etc., has higher and higher requirements for the power consumption of the screen, so a batch of new low-power technologies have emerged in panel companies, such as low temperature polycrystalline oxide (LTPO), pol-less technology. However, at present, these technologies mostly reduce the power consumption in the thin film transistor (TFT) process segment or the module segment, and the light extraction efficiency inside the OLED has not been improved.

[0003] Therefore, there is an urgent need for a display panel with high and balanced light extraction efficiency, high stability of light emitting devices, and long service life. SUMMARY

[0004] The embodiments of the present application provide a display panel and a mobile terminal, which can effectively improve the light extraction efficiency and light emission balance of the display panel, and the display panel has low power consumption, high stability, and long service life.

[0005] The present application provides a display panel, comprising:

[0006] a substrate layer;

[0007] a light emitting device layer disposed on the substrate layer, the light emitting device layer comprising a plurality of first color light emitting devices, a plurality of second color light emitting devices, and a plurality of third color light emitting devices; the light emitting device layer further comprising an anode layer, a pixel definition layer, a light emitting layer, and a cathode, the anode layer comprising a plurality of anodes; the pixel definition layer being provided with a pixel opening corresponding to the anode, the light emitting layer being disposed in the pixel opening and connected with the anode, and the cathode being disposed on the light emitting layer;

[0008] The plurality of anodes include a plurality of first anodes corresponding to the first color light emitting devices, a plurality of second anodes corresponding to the second color light emitting devices, and a plurality of third anodes corresponding to the third color light emitting devices. At least one of the first anode, the second anode, and the third anode has a recess structure in the pixel opening. The recess structure includes a reflective side wall in the form of a slope surface.

[0009] The area of the first anode is greater than the area of the second anode, and the area of the second anode is greater than the area of the third anode.

[0010] The ratio of the area of the recess structure on the first anode to the area of the first anode is less than the ratio of the area of the recess structure on the second anode to the area of the second anode. The ratio of the area of the recess structure on the second anode to the area of the second anode is less than the ratio of the area of the recess structure on the third anode to the area of the third anode.

[0011] Optionally, the total area of the recess structure on the first anode is greater than the total area of the recess structure on the second anode, and the total area of the recess structure on the second anode is greater than the total area of the recess structure on the third anode.

[0012] Optionally, the recess structure includes a bottom surface, the reflective side wall is connected to the edge of the bottom surface, the acute angle between the reflective side wall and the bottom surface is α, and 10≤α≤80°.

[0013] Optionally, the base layer is provided with a receiving groove, the recess structure is located in the receiving groove, the reflective side wall is fitted with the side wall of the receiving groove, and the shape of the recess structure is the same as the shape of the receiving groove.

[0014] The base layer includes a substrate, a driving circuit layer provided on the substrate, and a flat layer provided on the driving circuit layer. The driving circuit layer includes a plurality of driving devices, and the flat layer includes the receiving groove corresponding to the anode.

[0015] Optionally, the flat layer is provided with an anode connection hole corresponding to each anode. The driving device is electrically connected to the corresponding anode through the anode connection hole. The distance between the edge of the receiving groove and the anode connection hole is greater than or equal to 1 um.

[0016] Optionally, the depth H of the recess structure satisfies 0.1 um≤H≤1 um, the width of the bottom surface is W0, and 1 um≤W0≤10 um.

[0017] Optionally, the anode comprises at least two of the recessed structures, the distance between the edges of the bottom surfaces of two adjacent recessed structures is d1, d1>1um, and 2H / tanα≤d1, H is the depth of the recessed structure.

[0018] Optionally, the recessed structure comprises a groove, and the groove comprises a closed groove or a linear groove.

[0019] When the groove is the linear groove, a plurality of linear grooves are arranged on the anode, and the plurality of linear grooves are arranged in intersection.

[0020] Optionally, the outer contour of the groove is at least partially parallel to the contour of the corresponding anode, and the outer contour of the groove is an axisymmetric figure.

[0021] Optionally, the sizes of the recessed structures on each anode are the same, the number of the recessed structures on the first anode is greater than the number of the recessed structures on the second anode, and the number of the recessed structures on the second anode is greater than the number of the recessed structures on the third anode.

[0022] The application also provides a mobile terminal comprising the display panel.

[0023] The application has at least the following beneficial effects:

[0024] The application comprises a substrate layer and a light-emitting device layer arranged in a stack, the light-emitting device layer comprises a plurality of first color light-emitting devices, a plurality of second color light-emitting devices, and a plurality of third color light-emitting devices; the light-emitting device layer comprises an anode layer, a pixel definition layer, a light-emitting layer, and a cathode, wherein the anode layer comprises a plurality of anodes, the pixel definition layer is provided with a plurality of pixel openings corresponding to the anodes to expose part of the anodes, the light-emitting layer is arranged in the pixel openings and connected with the anodes in the pixel openings, and the cathode is arranged on the light-emitting layer to make the light-emitting devices of different colors emit light; the plurality of anodes comprise a plurality of first anodes corresponding to the first color light-emitting devices, a plurality of second anodes corresponding to the second color light-emitting devices, and a plurality of third anodes corresponding to the third color light-emitting devices, and the area of the first anodes is greater than the area of the second anodes, and the area of the second anodes is greater than the area of the third anodes.

[0025] In the pixel opening, the first anode, the second anode and the third anode all have a recess structure, and the recess structure includes a sloping reflective sidewall, which can reflect a part of the side light of the light emitting atoms, so that the light is emitted in a positive direction after reflection, realizing the reuse of the side light, improving the light emitting efficiency of the display panel, and reducing the display power consumption of the display panel under the premise of ensuring the original forward light emission; the area ratio of the recess structure on the first anode to the area of the first anode is less than the area ratio of the recess structure on the second anode to the area of the second anode; the area ratio of the recess structure on the second anode to the area of the second anode is less than the area ratio of the recess structure on the third anode to the area of the third anode, so as to balance the degree of light emission efficiency improvement and the flatness of the anode surface, so that the light emission between different color light emitting devices on the display panel is more balanced, the white balance of the light emission picture is ensured, the display effect of the display panel is improved, and the service life of the display panel is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1a is a partial structure schematic diagram of a display panel provided by the embodiments of the present application;

[0028] Figure 1b is a film layer structure schematic diagram of a display panel provided by the embodiments of the present application;

[0029] Figure 2 is a light emission principle diagram of a display panel provided by the embodiments of the present application;

[0030] Figure 3 is a top view structure schematic diagram of a light emitting device layer in a display panel provided by the embodiments of the present application;

[0031] Figure 4 is a top view structure schematic diagram of another light emitting device layer in a display panel provided by the embodiments of the present application;

[0032] Figure 5 is a top view structure schematic diagram of a display panel provided by another embodiment of the present application;

[0033] Figure 6 is a top view structure schematic diagram of a display panel provided by another embodiment of the present application;

[0034] Figure 7 is a top view structural schematic diagram of a display panel provided by another embodiment of the present application;

[0035] Figure 8 is a film layer cross-sectional view of a light emitting device in a display panel provided by an embodiment of the present application;

[0036] Figure 9 is a film layer cross-sectional view of a light emitting device in another display panel provided by an embodiment of the present application;

[0037] Figure 10 is a film layer cross-sectional view of a light emitting device in another display panel provided by an embodiment of the present application;

[0038] Figure 11 is Figure 6 or Figure 7 is a cross-sectional view at A-A' in

[0039] Figure 12 is Figure 6 or Figure 7 is a cross-sectional view at B-B' in

[0040] FIG. 1 is a top view structural schematic diagram of a display panel provided by an embodiment of the present application;

[0041] substrate layer 100, anode 101, effective anode 1011, pixel definition layer 102, light emitting layer 103, cathode 104, pixel opening K1, recess structure T1, reflective sidewall T12, bottom surface T11, accommodating groove P1, anode connecting hole P2, pixel opening diameter L1, recess structure bottom surface width W0, recess structure depth H, acute angle α between the reflective sidewall and the bottom surface, forward light emission SL, lateral light emission BL, first color light emitting device 201, second color light emitting device 202, third color light emitting device 203, first anode 201a, second anode 202a, third anode 203a; substrate 1001, driving circuit layer 1002, planarization layer 1003, driving device 10021; DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] The embodiments of the present application provide a display panel and a mobile terminal. The following are described in detail respectively. It should be noted that the description order of the following embodiments is not used as a limitation on the preferred order of the embodiments. In addition, in the description of the present application, the term "comprises" means "comprises but is not limited to". The terms first, second, third, etc. are only used as labels and do not impose a numerical requirement or establish an order. Various embodiments of the present application can exist in a range of forms; it should be understood that the description in a range of forms is only for the convenience and brevity, and should not be understood as a hard limitation on the scope of the present application; therefore, it should be considered that the range described has been specifically disclosed all possible sub-ranges and single values in the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers in the range, such as 1, 2, 3, 4, 5 and 6, regardless of the range. In addition, whenever a numerical range is indicated in the present document, it refers to any cited number (fraction or integer) in the indicated range.

[0044] The prior art tends to provide a display panel with relatively lower power consumption. The low power consumption of the conventional display panel is usually achieved by improving the process of the driving device or the structure of the display module, and the process of the light-emitting layer of the OLED is rarely improved, resulting in a bottleneck in reducing the power consumption of the OLED, and the overall light extraction efficiency of the display panel is low.

[0045] In order to improve the light extraction efficiency of the display panel, reduce the display power consumption of the display panel, and prolong the service life of the display panel, the present application provides the following technical solutions, which are specifically described as follows Figures 1a-12 .

[0046] The embodiments of the present application provide a display panel, which is specifically described as follows Figures 1a-12 , comprising:

[0047] a substrate layer 100;

[0048] a light-emitting device layer disposed on the substrate layer 100, the light-emitting device layer comprising a plurality of first color light-emitting devices 201, a plurality of second color light-emitting devices 202, and a plurality of third color light-emitting devices 203; the light-emitting device layer further comprises an anode layer, a pixel definition layer 102, a light-emitting layer 103, and a cathode 104, the anode layer comprising a plurality of anodes 101; the pixel definition layer is provided with a pixel opening K1 corresponding to the anode, the light-emitting layer 103 is disposed in the pixel opening K1 and connected with the anode 101, and the cathode 104 is disposed on the light-emitting layer 103;

[0049] The plurality of anodes 101 include a plurality of first anodes 201a corresponding to the first color light-emitting device 201, a plurality of second anodes 202a corresponding to the second color light-emitting device 202, and a plurality of third anodes 203a corresponding to the third color light-emitting device 203. Within the pixel opening K1, at least one first anode 201a, one second anode 202a, and one third anode 203a have a recessed structure T1, and the recessed structure T1 includes a sloping reflective sidewall T12.

[0050] The area of ​​the first anode 201a is larger than the area of ​​the second anode 202a, and the area of ​​the second anode 202a is larger than the area of ​​the third anode 203a;

[0051] like Figure 4 As shown, among the plurality of anodes 101 having the recessed structure T1, the area ratio of the recessed structure T1 on the first anode 201a is smaller than the area ratio of the recessed structure T1 on the second anode 202a; the area ratio of the recessed structure T1 on the second anode 202a is smaller than the area ratio of the recessed structure T1 on the third anode 203a.

[0052] It should be noted that the structure of the anode 101 has a great influence on the stability of the light-emitting device, the lifespan of the light-emitting device, and the display effect of the display panel. Although setting a recessed structure T1 on the anode 101 can improve the light extraction efficiency, the manufacturing process of the recessed structure T1 also makes the surface of the anode 101 have an uneven structure, which makes the contact between the light-emitting layer 103 and the anode 101 prone to poor. In order to balance the light extraction efficiency, the stability of the light-emitting device, and the lifespan of the light-emitting device, the technical solution of this embodiment is provided.

[0053] Specifically, such as Figure 1bAs shown, the substrate layer 100 may include a combination of a substrate 1001 of the display panel and a driving circuit layer 1002. A planarization layer 1003 is disposed on the side of the driving circuit layer 1002 near the light-emitting layer 103. The material of the planarization layer 1003 may be an organic polymer. The material of the substrate 1001 may be glass, transparent ceramic, transparent plastic, or various flexible or bendable materials, such as polymer resins, such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC), or cellulose acetate propionate (CAP).

[0054] like Figure 1b As shown, the driving circuit layer 1002 in this embodiment can be an array substrate layer, which includes a plurality of driving devices 10021. Specifically, the driving device 10021 can be a thin film transistor. The thin film transistor is connected to the light-emitting device and controls the light-emitting device on the light-emitting layer 103 to emit light.

[0055] Specifically, the light-emitting device layer includes a pixel definition layer 102, on which a plurality of pixel openings K1 are provided. The diameters of the pixel openings K1 can be the same or different, and can be adjusted according to the actual production situation. No restrictions are imposed here. The material of the pixel definition layer 102 includes, but is not limited to, photocurable adhesive.

[0056] Specifically, the light-emitting device layer further includes an anode layer, which includes a plurality of anodes 101. The plurality of anodes 101 are arranged in the same layer and spaced apart, and one anode 101 corresponds to one light-emitting device.

[0057] Specifically, in this embodiment, the first color light-emitting device 201 is a blue light-emitting device, the second color light-emitting device 202 is a red light-emitting device, and the third color light-emitting device 203 is a green light-emitting device.

[0058] Specifically, such as Figure 1aAs shown, the pixel definition layer 102 is arranged on the anode layer, and one pixel opening K1 corresponds to one anode 101, the outline shape of the pixel opening K1 is consistent with the shape of the corresponding anode 101, and the material of the anode 101 is a conductive material with high reflection performance, which can specifically include metal, alloy, metal oxide or other conductive materials, such as silver, titanium, aluminum, etc.

[0059] Specifically, as shown in the figure, Figure 1a the anode 101 in the pixel opening K1 is provided with a light-emitting layer 103, the material of the light-emitting layer 103 is an organic light-emitting material, and the diameter of the pixel opening is L1.

[0060] Specifically, as shown in the figure, Figure 1a the light-emitting layer 103 is provided with a cathode 104, and the material of the cathode 104 includes but is not limited to metal, metal oxide and transparent conductive material.

[0061] It should be noted that, as shown in the figure, Figure 2 the light-emitting layer 103 has multiple light-emitting directions, and part of the light-emitting atoms are more conducive to horizontal light emission (but not all horizontal light emission), and the light-emitting atoms of the light-emitting layer 103 emit light including forward light emission SL and part of side light emission BL under the action of charge injection and recombination. In the traditional light-emitting device structure, the side light emission BL is continuously reflected to form a waveguide mode, which cannot emit light forwardly SL, which will reduce the light emission coupling efficiency, and usually only 20% of the light emission of the light-emitting layer 103 can be utilized.

[0062] In order to further improve the light emission effect, the anode 101 of the present example is provided with a recess structure T1, and the recess structure T1 has a reflective side wall T12. On the basis of ensuring the forward light emission SL of the original light-emitting atom, part of the side light emission BL is reflected on the reflective side wall T12 to form increased forward light emission SL, so that part of the side light emission BL can be further utilized to improve the light emission efficiency of the light-emitting layer 103.

[0063] Specifically, the recess structure T1 can be a groove, including a bottom surface T11 and a reflective side wall T12 connected with the bottom surface T11 as the inner side wall of the groove, and the reflective side wall T12 has high reflectivity.

[0064] Specifically, the recess structure T1 includes a sloping reflective sidewall T12, wherein "sloping" means that the reflective sidewall T12 has a certain inclination angle relative to the bottom surface T11 (which can also be a horizontal surface), the acute angle a between the reflective sidewall T12 and the bottom surface T11 is 0-90°, not including the end point value, due to the thickness of the anode layer and the size limitation of the pixel opening K1, the included angle is preferably 10-80°, further 20-60°, and more preferably 45°.

[0065] Specifically, in the recess structure T1 on the anode 101, the reflective sidewall T12 is not limited in shape or specific structure, and any structure capable of reflecting the lateral light BL is within the protection scope of the present application.

[0066] Specifically, the peripheral portion of the anode 101 in the anode layer partially overlaps with the opening edge portion of the pixel opening K1 in the pixel definition layer 102, the substrate layer 100 is provided with an anode connecting hole P2, the anode 101 partially penetrates through the anode connecting hole P2 and is electrically connected with the driving device 10021, and the portion of the anode 101 exposed by the pixel opening is the effective anode 1011.

[0067] Specifically, the light-emitting layer 103 is arranged in the pixel opening K1, and the light-emitting layer 103 is in close contact with the anode 101 (specifically the effective anode 1011) in the pixel opening K1 and the sidewall of the pixel opening K1.

[0068] Specifically, the light-emitting layer 103 is an evaporated organic material, including a hole transport layer, a functional layer, a light-emitting layer 103, an electron transport layer and an electron injection layer arranged in layers.

[0069] Specifically, the light-emitting layer 103 is provided with a cathode 104, which can be provided in a full surface, i.e., the cathode 104 covers the pixel definition layer 102 and the light-emitting layer 103.

[0070] Specifically, in the plurality of first color light-emitting devices 201, all the first color light-emitting devices 201 can have the recess structure T1, or part of the first color light-emitting devices 201 can have the recess structure T1.

[0071] Specifically, in the plurality of second color light-emitting devices 202, all the second color light-emitting devices 202 can have the recess structure T1, or part of the second color light-emitting devices 202 can have the recess structure T1.

[0072] Specifically, among the plurality of third color light emitting devices 203, all of the third color light emitting devices 203 can have the recess structure T1, or part of the third color light emitting devices 203 can have the recess structure T1.

[0073] Specifically, the area ratio of the recess structure T1 on the first anode 201a is less than the area ratio of the recess structure T1 on the second anode 202a, and the area ratio of the recess structure T1 on the second anode 202a is less than the area ratio of the recess structure T1 on the third anode 203a, so that the surface of the first anode 201a provided with the recess structure T1 has higher flatness than the surface of the second anode 202a and the surface of the third anode 203a provided with the recess structure T1, so that the anode 101 of the blue light emitting device is in closer contact with the light emitting layer 103, effectively prolonging the service life of the blue light emitting device, making up for the defect that the service life of the blue light emitting device is relatively short due to the material limitation of the blue light emitting device itself, improving the overall service life of the display panel, and also making the overall light emitting efficiency of the display panel higher.

[0074] It can be understood that by providing a display panel comprising a base layer 100 and a light emitting device layer stacked, the light emitting device layer comprises an anode layer, a pixel definition layer 102, a light emitting layer 103 and a cathode 104, wherein the anode layer comprises a plurality of anodes 101, the pixel definition layer 102 is provided on the anode layer, the pixel definition layer 102 is provided with a plurality of pixel openings K1, the pixel openings K1 correspond one-to-one to the anodes 101, expose part of the anodes 101, the pixel openings K1 are provided with the light emitting layer 103 and the light emitting layer 103 is connected to the anodes 101 in the pixel openings K1, and the light emitting layer 103 is provided with the cathode 104; in the pixel opening K1, at least one of the anodes 101 has a recess structure T1, the recess structure T1 comprises a reflective side wall T12 in the form of a slope, the reflective side wall T12 can reflect part of the side light BL of the light emitting atoms, so that the reflected light is emitted in the form of forward light SL, realizing the reuse of the side light BL, under the premise of ensuring the original forward light SL, effectively improving the light emitting efficiency of the display panel, reducing the display power consumption of the display panel, and prolonging the service life of the display panel.

[0075] Meanwhile, by differentiating the arrangement of the recessed structures on the different colored light-emitting devices, the area ratio of the recessed structure T1 on the first colored light-emitting device 201 is smaller than that on the second colored light-emitting device 202, and the area ratio of the recessed structure T1 on the red light-emitting device is larger than that on the green light-emitting device. This results in a higher anode surface flatness for the blue light-emitting device compared to the red and green light-emitting devices, leading to more stable display and a longer lifespan. This effectively improves the overall white light emission efficiency of the display panel and also extends the lifespan of the display panel.

[0076] In one embodiment, the total area of ​​the recessed structure T1 on the first anode 201a is greater than the total area of ​​the recessed structure T1 on the second anode 202a, and the total area of ​​the recessed structure T1 on the second anode 202a is greater than the total area of ​​the recessed structure T1 on the third anode 203a.

[0077] It should be noted that, as Figures 3-7 As shown, in the example, the lifespan and light emission efficiency of blue light-emitting devices are usually less than those of red and green light-emitting devices. In order to further improve the light emission efficiency of the display panel, balance the display effect, and extend the lifespan of the display panel, the area of ​​blue light-emitting devices is usually set to be larger than that of red light-emitting devices, or the area of ​​blue light-emitting devices is larger than that of green light-emitting devices, or the area of ​​blue light-emitting devices is larger than that of red light-emitting devices, and the area of ​​red light-emitting devices is larger than that of green light-emitting devices.

[0078] For the reasons mentioned above, such as Figure 2 As shown, it is therefore necessary to set the total area of ​​the recessed structure T1 on all the first color light-emitting devices 201 to be greater than the total area of ​​the recessed structure T1 on all the second color light-emitting devices 202, and greater than the total area of ​​the recessed structure T1 on all the third color light-emitting devices 203, so that the light emission efficiency of the blue light-emitting device corresponding to the first color light-emitting device 201 can be greater than the light emission efficiency of the red light-emitting device corresponding to the second color light-emitting device 202, and greater than the light emission efficiency of the red light-emitting device corresponding to the third color light-emitting device 203, so as to simultaneously improve the overall light emission efficiency of the display panel.

[0079] Specifically, such as Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the number of second color light emitting devices 202 provided with the recess structure T1, the number of first color light emitting devices 201 provided with the recess structure T1, and the number of third color light emitting devices 203 provided with the recess structure T1 can be different, and can be adjusted according to actual conditions, but need to meet the condition that the total area of the recess structure T1 on all the first color light emitting devices 201 is greater than the total area of the recess structure T1 on all the second color light emitting devices 202, and greater than the total area of the recess structure T1 on all the third color light emitting devices 203, so that the light emitting efficiency of the blue light emitting device corresponding to the first color light emitting device 201 can be greater than the light emitting efficiency of the red light emitting device corresponding to the second color light emitting device 202, and greater than the light emitting efficiency of the green light emitting device corresponding to the third color light emitting device 203, thereby improving the overall light emitting efficiency of the display panel and avoiding the influence of the material of the blue light emitting device on the display effect.

[0080] Specifically, the total area of the recess structure T1 refers to the sum of the areas of the recess structure T1 on all the light emitting devices of this color in the display panel in the direction perpendicular to the base layer 100.

[0081] In actual production, when the recess structure T1 is a groove, the area of the recess structure T1 can only refer to the area of the bottom surface T11 of the groove, and the projection of the reflective side wall T12 in the direction perpendicular to the base layer 100 is small and can be ignored.

[0082] In an example, the shapes of the recess structures on the first anode 201a, the second anode 202a, and the third anode 203a are not limited, and generally, the sizes of the recess structures T1 on different anodes 101 are the same for process convenience.

[0083] In another example, the sizes of the recess structures on the first anode 201a, the second anode 202a, and the third anode 203a can be different. For example, when the recess structure is a strip-shaped groove, the widths of the grooves on different anodes 101 can be set to be different to ensure that each color light emitting device has a corresponding larger light emitting efficiency.

[0084] It can be understood that by setting the total area of the recess structure T1 on the first anode 201a to be greater than the total area of the recess structure T1 on the second anode 202a, and the total area of the recess structure T1 on the second anode 202a to be greater than the total area of the recess structure T1 on the third anode 203a, the recess structures T1 on the anodes 101 corresponding to light emitting devices of different colors are set differently, so that the light emitting efficiency of the blue light emitting device increases more, the light emitting efficiency of the blue light emitting device of the display panel is significantly enhanced, the service life of the blue light emitting device is prolonged, and the service life of the display panel is further improved.

[0085] In one embodiment, the size of the recessed structure on each of the anodes is the same, the number of the recessed structures on the first color light emitting device is greater than the number of the recessed structures on the second color light emitting device, and the number of the recessed structures on the second color light emitting device is greater than the number of the recessed structures on the third color light emitting device.

[0086] Specifically, in the present embodiment, the size of the recessed structure T1 on different light emitting devices is the same, which means that when the recessed structure T1 is a closed groove, the depth of the corresponding groove, the inclination angle of the reflective sidewall T12, and the shape (or outer contour) of the bottom surface T11 are all the same, and when the recessed structure T1 is a linear groove, the size specifically corresponds to the depth of the groove, the inclination angle of the reflective sidewall T12, and the shortest distance between two oppositely arranged reflective sidewalls T12 (or the width of the groove) are the same.

[0087] It should be noted that, Figure 11 may be Figure 6 or Figure 7 the cross-sectional view of A-A' in FIG. Figure 12 may be Figure 6 or Figure 7 the cross-sectional view of B-B' in FIG.

[0088] In a specific example, as shown in FIG. Figure 7 When the light emitting device is circular, the outer contour of the recessed structure T1 is circular, wherein one closed groove is arranged on the third color light emitting device 203, a circular ring-shaped groove is arranged on the red light emitting device, and two concentric ring-shaped grooves are arranged on the blue light emitting device.

[0089] In a specific example, as shown in FIG. Figure 5 When the light emitting device is square / elliptical, the green light emitting device can not be provided with a recessed structure T1, or can be provided with a cross-shaped strip-shaped groove, the red light emitting device can be provided with a cross-shaped groove (i.e., in the XY direction, each two linear grooves are staggered), and the blue light emitting device can be provided with a plurality of strip-shaped grooves intersecting in a grid shape (i.e., in the XY direction, each three linear grooves are staggered).

[0090] In a specific example, as shown in FIG. Figure 6 When the light emitting device is square / elliptical, the green light emitting device can not be provided with a recessed structure T1, or can be provided with an elliptical closed groove, the red light emitting device can be provided with a square ring-shaped groove, and the blue light emitting device can be provided with a back-shaped groove (i.e., two concentric square ring-shaped grooves).

[0091] It should be noted that, in addition to the above embodiments, if the light emitting device is arranged in a polygonal structure, such as from a quadrilateral design to an octagonal or N-polygon, the shape of the recess structure T1 changes accordingly, as long as each side of the recess structure T1 is parallel to the corresponding side of the light emitting device, and the shape of the recess structure T1 has symmetry in at least one direction. The above technical solution can make the viewing angle of the OLED display panel have symmetry, and avoid poor optical taste.

[0092] In an embodiment, the recess structure T1 includes a bottom surface T11, the reflective side wall T12 is connected to the edge of the bottom surface T11, and the acute angle between the reflective side wall T12 and the substrate layer 100 is α, 10≤α≤80°.

[0093] Specifically, the recess structure T1 includes a bottom surface T11 with a flat surface, and the light emitting layer 103 in the pixel opening K1 is arranged in close contact with the anode 101 in the pixel opening K1 and the sidewall of the pixel opening K1.

[0094] Specifically, in order to improve the viewing angle deviation of the display panel, the inclination angle of the reflective side wall T12 is further limited.

[0095] Specifically, in the direction perpendicular to the substrate layer 100, the outer contour shape of the recess structure T1 is different, and the shape of the bottom surface T11 is also different. The outer contour shape of the bottom surface T11 is preferably the same as the shape of the corresponding light emitting device on the light emitting device layer, which can be circular, annular, rectangular, or other regular or irregular patterns.

[0096] It can be understood that by further limiting the acute angle α between the reflective side wall T12 and the first layer to be between 10 and 80 degrees, the amount of light emitted laterally BL is increased, and the color deviation of the display panel is improved to some extent.

[0097] In an example, as shown in Figure 2 、 Figure 3 and Figure 4 , the bottom surface T11 of the recess structure T1 is a flat surface, and the reflective side wall T12 is a flat slope or an arc slope.

[0098] Specifically, the bottom surface T11 is flat to improve the light emitting effect of the light emitting atom.

[0099] It should be noted that the light emitting atom emits light (only referring to the light emitting atom of the forward light SL), and the light emitting brightness is the strongest at the forward viewing angle (i.e. the light is perpendicular to the light emitting surface, and the angle is 0°). As the viewing angle increases, the light brightness will decay, and the uneven surface of the bottom surface T11 will affect the forward light SL of the light emitting atom.

[0100] The embodiment preferably has an outward convex slope. By setting the outward convex reflection side wall T12, on one hand, the reflection side light BL of the light emitting atoms can be reflected at a large angle as much as possible, and on the other hand, the reflection side wall T12 will not affect the light emitting mode of the light emitting atoms in the light emitting layer 103, and compared with the flat slope reflection side wall T12 and the inward convex skin, the viewing angle range can be further increased.

[0101] In an embodiment, as shown in Figure 1a , the base layer 100 is provided with a containing groove P1, and the recessed structure T1 is located in the containing groove P1. The reflection side wall T12 of the recessed structure T1 is attached to the side wall of the containing groove P1, and the shape of the recessed structure T1 is the same as that of the containing groove P1.

[0102] The base layer 100 includes a substrate 1001, a driving circuit layer 1002 provided on the substrate 1001, and a flat layer 1003 provided on the driving circuit layer 1002. The driving circuit layer 1002 includes a plurality of driving devices 10021. The containing groove P1 is provided on the flat layer 1003, that is, the flat layer includes a containing groove corresponding to the anode.

[0103] It should be noted that the anode layer in the prior art generally has a limited thickness, so that even if the recessed structure T1 is provided, the climbing section of the reflection side wall T12 is long, the inclination angle α is small, and the side light BL cannot be better reflected, and the light emitting efficiency is limited.

[0104] Based on the above reasons, by providing the containing groove P1 on the flat layer 1003 of the base layer 100, the shape and depth of the containing groove P1 can be matched and adjusted according to the size (shape or depth) of the actual required recessed structure T1 in the process (by etching the flat layer 1003). After forming the containing groove P1, the anode layer is formed on the base layer 100, and the anode layer forms the recessed structure T1 corresponding to the containing groove P1.

[0105] It can be understood that by providing the containing groove P1 on the base layer 100, the inclination angle of the reflection side wall T12 in the recessed structure T1 on the anode layer can be selected in a larger range, the process is more convenient, the precision requirement is lower than that of the scheme of directly providing the recessed structure T1 on the anode layer, and the production process is not additionally increased, and the production cost is lower.

[0106] As shown in the above embodiment, Figure 11 and Figure 12 , the flat layer 1003 is provided with an anode connecting hole P2 corresponding to each anode 101. The distance between the edge of the containing groove P1 and the anode connecting hole P2 is greater than or equal to 1 um.

[0107] Specifically, as shown in Figure 11 The edge of the accommodating groove P1 is actually the effective anode 1011 edge of the light-emitting device, and the distance between the edge and the anode connecting hole P2 is greater than or equal to 1 um, so as to ensure better connection between the light-emitting device and the driving device 10021, and avoid display defects of the light-emitting device caused by the accuracy error of the punching in the process. Specifically, 1 um, 3 um, 5 um, etc. can be selected.

[0108] Correspondingly, in an example, the shortest distance between the recess structure T1 on the light-emitting device and the inner edge of the corresponding pixel opening K1 is the boundary distance, the boundary distance of the recess structure T1 on the light-emitting device of the first color 201 is less than the boundary distance of the recess structure T1 on the light-emitting device of the second color 202, and the boundary distance of the recess structure T1 on the light-emitting device of the second color 202 is less than the boundary distance of the recess structure T1 on the light-emitting device of the third color 203.

[0109] As described above, as shown in Figure 1a The depth H of the recess structure T1 satisfies 0.1 um≤H≤1 um, the width of the bottom surface T11 is W0, and 1 um≤W0≤10 um.

[0110] Specifically, the depth H of the recess structure T1 can be any one of 0.1 um, 0.2 um, 0.3 um, 0.5 um, 0.7 um, 0.9 um, and 1.0 um, which can be adjusted according to actual production conditions.

[0111] In an embodiment, as shown in Figure 11 and Figure 12 The anode 101 includes at least two recess structures T1, the spacing between the edges of the bottom surfaces T11 of the two adjacent recess structures T1 is d1, d1>1 um, and 2H / tanα≤d1, H being the depth of the recess structure T1.

[0112] Specifically, d1 is the minimum value of the spacing between the edges of the bottom surfaces T11 of the two adjacent recess structures T1.

[0113] Specifically, in order to improve the light-emitting efficiency of the light-emitting device as much as possible, the light-emitting efficiency of the light-emitting device is positively correlated with the area of the reflective side wall T12 when the inclination angle is constant in a certain stage, and a plurality of anodes 101 including at least two recess structures T1 are arranged.

[0114] It can be understood that the anode 101 is provided with a plurality of recess structures T1, which can increase the area of the reflective side wall T12 to a certain extent and improve the light-emitting efficiency of the light-emitting device.

[0115] In an embodiment, the anode 101 comprises at least one of the recessed structures T1, and the recessed structure T1 comprises a groove, and the groove comprises a closed groove or a linear groove.

[0116] Specifically, the recessed structure T1 comprises a bottom surface T11 and the reflective sidewall T12, and the bottom surface T11 of the closed groove is a planar shape, such as a circle, an ellipse, a rectangle, etc., and the bottom surface T11 of the linear groove is a long strip shape with an extension direction, which can be parallel to the edge of the anode 101.

[0117] Specifically, a plurality of recessed structures T1 can be arranged on the anode 101 corresponding to one light emitting device, preferably no more than 4, which is adjusted according to the size of the recessed structure T1 and the process precision of the process.

[0118] Specifically, the groove can have various shapes, and the cross-sectional shape of the groove includes but is not limited to an axisymmetric polygon, an inverted trapezoid, a semicircle, etc.

[0119] Further, the long strip shape can be a straight line long strip, or a curved long strip, such as Figure 6 and Figure 7 the groove on the first anode 201a and the second anode 202a in FIG. 1, such as a circular ring shape, a back-shaped groove.

[0120] Specifically, the closed groove refers to the groove with a closed bottom surface T11, such as Figure 5 , Figure 6 and Figure 7 the groove on the third anode 203a in FIG. 3, such as a circle, an ellipse, a rectangle, etc.

[0121] The application does not limit the shape of the recessed structure T1, which can be adjusted according to the actual production situation and needs.

[0122] In an embodiment, the groove is the linear groove, and a plurality of linear grooves are arranged on the anode 101, and the plurality of linear grooves are arranged in intersection.

[0123] Specifically, as shown in Figure 5 , the cross-shaped groove arranged on the second anode 202a and the plurality of horizontal and vertical intersecting net-shaped grooves arranged on the first anode 201a.

[0124] In an embodiment, as shown in Figure 5 , Figure 6 and Figure 7 the contour of the groove is at least partially parallel to the contour of the anode 101 corresponding to the groove, and the contour of the groove is an axisymmetric shape.

[0125] Specifically, the light emitting device layer comprises a plurality of light emitting devices, each of which has a corresponding outer contour in a top view, which can be circular, rectangular, polygonal, or irregular.

[0126] Specifically, the contour shape of the groove refers to the outer contour formed by the length direction of the groove in a top view, which is the same as the outer contour shape of the corresponding light emitting device (specifically the anode 101, and further the effective anode 1011). For example, if the outer contour of the effective anode 1011 is circular, the pattern formed by the groove is also circular. For example, if the outer contour of the effective anode 1011 is rectangular, the pattern formed by the groove is also rectangular, or the groove is a straight line groove parallel to the edge of the effective anode 1011, and the pattern formed is a cross shape.

[0127] It should be noted that, in order to ensure the viewing angle symmetry of the display panel, the shape of the conventional light emitting device (which can be understood as a sub-pixel) is usually an axisymmetric figure.

[0128] It can be understood that the shape of the groove formed by the embodiment is the same as the shape of the light emitting device, or the extension direction of the groove is parallel to the corresponding side, which can effectively improve the symmetry of the viewing angle of the display panel and improve the optical taste.

[0129] The application also provides a mobile terminal comprising the display panel of any one of the above.

[0130] Specifically, the mobile terminal includes but is not limited to the following types: rollable or foldable mobile phones, watches, bracelets, televisions or other wearable display or touch electronic devices, and flexible smartphones, tablets, notebooks, desktop displays, televisions, smart glasses, smart watches, ATMs, digital cameras, car displays, medical displays, industrial control displays, e-paper, electrophoretic display devices, game consoles, transparent displays, double-sided displays, naked-eye 3D displays, mirror display devices, semi-reflective and semi-transmissive display devices, etc.

[0131] In summary, the display panel provided by the application includes a base layer 100 and a light-emitting device layer arranged in layers, the light-emitting device layer includes an anode layer, a pixel definition layer 102, a light-emitting layer 103 and a cathode 104, wherein the anode layer includes a plurality of anodes 101, the pixel definition layer 102 is arranged on the anode layer, a plurality of pixel openings K1 are arranged on the pixel definition layer 102, the pixel openings K1 correspond to the anodes 101 one by one, part of the anodes 101 are exposed, the light-emitting layer 103 is arranged in the pixel openings K1 and connected with the anodes 101 in the pixel openings K1, and the cathode 104 is arranged on the light-emitting layer 103; in the pixel openings K1, at least one of the anodes 101 has a recess structure T1, the recess structure T1 includes a reflective side wall T12 in the form of a slope, the reflective side wall T12 can reflect part of the side light BL of light-emitting atoms, so that the light BL is emitted in a forward direction SL after reflection, the reuse of the light BL is realized, the light-emitting efficiency of the display panel is effectively improved, the display power consumption of the display panel is reduced, and the service life of the display panel is prolonged.

[0132] Meanwhile, by setting the total area of the recess structure T1 on the first anode 201a to be greater than the total area of the recess structure T1 on the second anode 202a, and the total area of the recess structure T1 on the second anode 202a to be greater than the total area of the recess structure T1 on the third anode 203a, the recess structure T1 on the anode 101 corresponding to light-emitting devices of different colors is set differently, so that the light-emitting efficiency of the blue light-emitting device is increased more, the light-emitting efficiency of the blue light-emitting device of the display panel is significantly enhanced, the service life of the blue light-emitting device is prolonged, and the service life of the display panel is further improved.

[0133] The display panel and mobile terminal provided by the embodiments of the application are described in detail above, and the principles and implementation manners of the application are described by applying specific examples; the above description of the embodiments is only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the application; in summary, the content of the specification should not be understood as a limitation of the application.

Claims

1. A display panel, characterized in that, include: basal layer; A light-emitting device layer is disposed on the substrate layer. The light-emitting device layer includes a plurality of first-color light-emitting devices, a plurality of second-color light-emitting devices, and a plurality of third-color light-emitting devices. The light-emitting device layer also includes an anode layer, a pixel definition layer, a light-emitting layer, and a cathode. The anode layer includes a plurality of anodes. The pixel definition layer has pixel openings corresponding to the anodes. The light-emitting layer is disposed within the pixel openings and connected to the anodes. The cathode is disposed on the light-emitting layer. The plurality of anodes include a plurality of first anodes corresponding to the first color light-emitting device, a plurality of second anodes corresponding to the second color light-emitting device, and a plurality of third anodes corresponding to the third color light-emitting device. Within the pixel opening, at least one of the first anodes, at least one of the second anodes, and at least one of the third anodes each have a recessed structure. The recessed structure includes a bottom surface and a sloping reflective sidewall. The bottom surface of the recessed structure is a flat surface. The area of ​​the first anode is larger than the area of ​​the second anode, and the area of ​​the second anode is larger than the area of ​​the third anode; The ratio of the area of ​​the recessed structure on the first anode to the area of ​​the first anode is less than the ratio of the area of ​​the recessed structure on the second anode to the area of ​​the second anode; the ratio of the area of ​​the recessed structure on the second anode to the area of ​​the second anode is less than the ratio of the area of ​​the recessed structure on the third anode to the area of ​​the third anode. The total area of ​​the recessed structure on the first anode is greater than the total area of ​​the recessed structure on the second anode, and the total area of ​​the recessed structure on the second anode is greater than the total area of ​​the recessed structure on the third anode.

2. The display panel as described in claim 1, characterized in that, The reflective sidewall is connected to the edge of the bottom surface, and the acute angle between the reflective sidewall and the bottom surface is α, where 10≤α≤80°.

3. The display panel as described in claim 2, characterized in that, A receiving groove is provided on the base layer, the recessed structure is located in the receiving groove, the reflective sidewall is attached to the sidewall of the receiving groove, and the shape of the recessed structure is the same as the shape of the receiving groove; The substrate layer includes a substrate, a driving circuit layer disposed on the substrate, and a planarization layer disposed on the driving circuit layer. The driving circuit layer includes a plurality of driving devices, and the planarization layer includes a receiving groove disposed corresponding to the anode.

4. The display panel as described in claim 3, characterized in that, An anode connection hole is provided on the planar layer for each anode. The driving device is electrically connected to the corresponding anode through the anode connection hole. The distance between the edge of the receiving tank and the anode connection hole is greater than or equal to 1 μm.

5. The display panel as described in claim 2, characterized in that, The depth H of the recessed structure satisfies 0.1um≤H≤1um, and the width of the bottom surface of the recessed structure is W0, and 1um≤W0≤10um.

6. The display panel as described in claim 5, characterized in that, The anode includes at least two recessed structures, and the distance between the bottom edges of two adjacent recessed structures is d1, where d1 > 1 μm and 2H / tanα ≤ d1, and H is the depth of the recessed structure.

7. The display panel as described in claim 1, characterized in that, The recessed structure includes a groove, which includes a closed groove or a linear groove; When the groove is a linear groove, multiple linear grooves are provided on an anode, and the multiple linear grooves intersect each other.

8. The display panel as described in claim 7, characterized in that, The outer contour of the groove is at least partially parallel to the contour of the corresponding anode, and the outer contour of the groove is an axisymmetric figure.

9. The display panel as claimed in claim 1, characterized in that, The recessed structures on each of the anodes are of the same size, the number of recessed structures on the first anode is greater than the number of recessed structures on the second anode, and the number of recessed structures on the second anode is greater than the number of recessed structures on the third anode.

10. A mobile terminal, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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