Display panel and display terminal

Abstract

The application provides a display panel and a display terminal, the display panel comprising a substrate layer, an anode layer and a hole transport layer; the anode layer comprises a plurality of anodes arranged in an array; at least one blocking structure is arranged between two adjacent anodes; the hole transport layer comprises a first transport part and a second transport part arranged at intervals, the first transport part is located on the anode, and the second transport part is located on the blocking structure; by arranging at least one blocking structure between two adjacent anodes, the hole transport layer is broken at the blocking structure, the first transport part and the second transport part arranged at intervals are formed, the transverse migration of holes between adjacent pixel units can be effectively prevented, crosstalk between adjacent pixel units can be effectively avoided, and the display effect is improved.

Description

TECHNICAL FIELD

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

[0002] Organic light-emitting diode (OLED) display panel is widely used in the display field due to its high contrast, high response speed, no viewing angle limitation, thinness and other excellent performances. Due to the small spacing between adjacent two pixel units, when the OLED display panel displays, the carriers not only migrate vertically (along the thickness direction of the OLED display panel) from the cathode / anode to the corresponding organic light-emitting layer, but also migrate horizontally between adjacent pixel units, that is, horizontal leakage occurs, resulting in crosstalk between adjacent pixel units. For example, the pixel unit that should not emit light emits light, affecting the display effect.

[0003] In particular, for silicon-based or glass-based micro OLED display panel for virtual reality (VR) display application, due to its pixel size is only one tenth of the traditional OLED display panel, making the crosstalk problem more serious. Therefore, it is necessary to improve this defect. SUMMARY

[0004] The embodiment of the present application provides a display panel, which is used for solving the technical problem that the carriers of the display panel in the prior art migrate horizontally between adjacent pixel units, resulting in crosstalk between adjacent pixel units.

[0005] The embodiment of the present application provides a display panel, which comprises a substrate layer, an anode layer and a hole transport layer; the anode layer is located on the substrate layer, and the anode layer comprises a plurality of anodes arranged in an array; the hole transport layer is located on the anode layer; wherein at least one blocking structure is arranged between adjacent two anodes, the hole transport layer comprises a first transport part and a second transport part arranged at intervals, the first transport part is located on the anode, and the second transport part is located on the blocking structure.

[0006] In the display panel provided by the embodiment of the present application, the blocking structure comprises a first blocking layer and a second blocking layer; the first blocking layer comprises a continuous first blocking part and a second blocking part, the first blocking part extends in a direction perpendicular to the light-out side of the display panel, and the second blocking part extends in the light-out side direction of the display panel; the second blocking layer is located on a side surface of the first blocking layer away from the substrate layer, and comprises a continuous third blocking part and a fourth blocking part, the third blocking part is arranged in parallel with the first blocking part, and the fourth blocking part is arranged in parallel with the second blocking part; wherein in the light-out side direction of the display panel, the width of the fourth blocking part is greater than or equal to the width of the second blocking part.

[0007] In the display panel provided by the embodiment of the present application, the vertical distance from one end of the fourth blocking part away from the third blocking part to the substrate layer is greater than the vertical distance from the first transport part to the substrate layer.

[0008] In the display panel provided by the embodiment of the present application, one end of the first transport part close to the second transport part is located on a side of the second blocking layer close to the substrate layer.

[0009] In the display panel provided by the embodiment of the present application, the display panel comprises a filling layer, and the filling layer is located between the blocking structure and the substrate layer; wherein in the light-out side direction of the display panel, the height of the filling layer is less than the height of the anode layer.

[0010] In the display panel provided by the embodiment of the present application, the material of the second blocking layer is different from the material of the first blocking layer, and the etching rate of the material of the second blocking layer is less than the etching rate of the material of the first blocking layer.

[0011] In the display panel provided by the embodiment of the present application, the display panel comprises a hole injection layer, and the hole injection layer is located between the anode layer and the hole transport layer; wherein two blocking structures are arranged between two adjacent anodes, and the hole injection layer comprises a first injection part and a second injection part arranged at intervals, the first injection part is located between the anode and the first transport part, and the second injection part is located between the blocking structure and the second transport part.

[0012] In the display panel provided by the embodiment of the present application, the planes where the end parts of the two blocking structures are located are perpendicular to the substrate layer.

[0013] In the display panel provided by the embodiment of the present application, the display panel comprises an exciton blocking layer, the exciton blocking layer is located on the side of the hole transport layer away from the hole injection layer; wherein three blocking structures are arranged between two adjacent anodes, the exciton blocking layer comprises a fifth blocking part and a sixth blocking part arranged at intervals, the fifth blocking part is located on the side of the first transport part away from the first injection part, and the sixth blocking part is located on the side of the second transport part away from the second injection part.

[0014] The embodiment of the present application also provides a display terminal, comprising a terminal main body and the display panel.

[0015] Beneficial effects: the display panel provided by the embodiment of the present application comprises a substrate layer, an anode layer and a hole transport layer; the anode layer is located on the substrate layer, the anode layer comprises a plurality of anodes arranged in an array; the hole transport layer is located on the anode layer; wherein at least one blocking structure is arranged between two adjacent anodes, the hole transport layer comprises a first transport part and a second transport part arranged at intervals, the first transport part is located on the anode, and the second transport part is located on the blocking structure; by arranging at least one blocking structure between two adjacent anodes, the hole transport layer is broken at the blocking structure to form the first transport part and the second transport part arranged at intervals, the transverse migration of holes between adjacent pixel units can be effectively prevented, crosstalk between adjacent pixel units can be effectively avoided, and the display effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] 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.

[0017] Figure 1 is a basic structure schematic diagram of the display panel provided by the embodiment of the present application.

[0018] Figure 2 is a basic structure schematic diagram of another display panel provided by the embodiment of the present application.

[0019] Figure 3 is a basic structure schematic diagram of still another display panel provided by the embodiment of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. In the drawings, the sizes and thicknesses of the components shown in the drawings are not in proportion for the sake of clarity, understanding and description.

[0021] Due to the small spacing between the two adjacent pixel units in the prior art, when the display panel displays, the carriers not only migrate vertically (in the thickness direction of the display panel) from the cathode / anode to the corresponding organic light-emitting layer, but also migrate horizontally between the adjacent pixel units, that is, horizontal leakage occurs, resulting in crosstalk between the adjacent pixel units. For example, the pixel unit that should not emit light emits light, affecting the display effect. The embodiment of the present application can solve the above defects.

[0022] As shown in Figure 1 The basic structure schematic diagram of the display panel provided by the embodiment of the present application is shown in FIG. 1. The display panel comprises a substrate layer 10, an anode layer 11 and a hole transport layer 13. The anode layer 11 is located on the substrate layer 10, and the anode layer 11 comprises a plurality of anodes 111 arranged in an array. The hole transport layer 13 is located on the anode layer 11. At least one blocking structure 18 is arranged between two adjacent anodes 111. The hole transport layer 13 comprises a first transport part 131 and a second transport part 132 arranged at intervals. The first transport part 131 is located on the anode 111, and the second transport part 132 is located on the blocking structure 18.

[0023] It can be understood that, by arranging at least one blocking structure 18 between two adjacent anodes 111, the hole transport layer 13 is broken at the blocking structure 18, forming the first transport part 131 and the second transport part 132 arranged at intervals. This can effectively prevent the holes from migrating horizontally between the adjacent pixel units, effectively avoid crosstalk between the adjacent pixel units, and improve the display effect.

[0024] In an embodiment, the blocking structure 18 comprises a first blocking layer 181 and a second blocking layer 182. The first blocking layer 181 comprises a first blocking part 1811 and a second blocking part 1812 arranged continuously. The first blocking part 1811 extends in a direction perpendicular to the light-out side of the display panel. The second blocking part 1812 extends in the light-out side direction of the display panel. The second blocking layer 182 is located on the side surface of the first blocking layer 181 away from the substrate layer 10. The second blocking layer 182 comprises a third blocking part 1821 and a fourth blocking part 1822 arranged continuously. The third blocking part 1821 is arranged in parallel with the first blocking part 1811. The fourth blocking part 1822 is arranged in parallel with the second blocking part 1812. In the light-out side direction of the display panel, the width of the fourth blocking part 1822 is greater than or equal to the width of the second blocking part 1812.

[0025] It should be noted that the first blocking part 1811 and the third blocking part 1821 are arranged in parallel with the substrate layer 10, the second blocking part 1812 forms an obtuse angle with the first blocking part 1811, the second blocking part 1812 extends along the light-out side direction of the display panel, and the second blocking part 1812 and the first blocking part 1811 combine to form an inverted trapezoidal structure; the fourth blocking part 1822 forms an obtuse angle with the third blocking part 1821, the fourth blocking part 1822 extends along the light-out side direction of the display panel, and the fourth blocking part 1822 and the third blocking part 1821 combine to form an inverted trapezoidal structure.

[0026] It can be understood that in the light-out side direction of the display panel, the width of the fourth blocking part 1822 is greater than or equal to the width of the second blocking part 1812 in the embodiment, when the hole transport layer 13 is deposited, the fourth blocking part 1822 will block the second blocking part 1812 below, and a part of the deposited material will be deposited at the position below the fourth blocking part 1822 and close to the second blocking part 1812, thereby being disconnected from the deposited material on the blocking structure 18, forming the first transport part 131 and the second transport part 132 arranged in a spaced manner, thereby preventing the holes from migrating horizontally between adjacent pixel units and avoiding crosstalk.

[0027] In an embodiment, the vertical distance from the end of the fourth blocking part 1822 away from the third blocking part 1821 to the substrate layer 10 is greater than the vertical distance from the first transport part 131 to the substrate layer 10.

[0028] It can be understood that by making the distance from the fourth blocking part 1822 to the substrate layer 10 greater than the distance from the first transport part 131 to the substrate layer 10, the fourth blocking part 1822 and the first transport part 131 have a certain vertical height difference, so that the hole transport layer 13 can be better disconnected at this position, thereby preventing the holes from migrating horizontally between adjacent pixel units and avoiding crosstalk.

[0029] In an embodiment, the end of the first transport part 131 close to the second transport part 132 is located on the side of the second blocking layer 182 close to the substrate layer 10.

[0030] It should be noted that theoretically, the first transport part 131 will not be formed below the second blocking layer 182, but in the deposition process, the deposition gas will diffuse around, so the first transport part 131 will also be formed on the side of the second blocking layer 182 close to the substrate layer 10.

[0031] In an embodiment, the display panel comprises a filling layer 19 located between the blocking structure 18 and the substrate layer 10; wherein the height of the filling layer 19 is less than the height of the anode layer 11 in the direction of the light-out side of the display panel.

[0032] It can be understood that, by arranging the filling layer 19 between the two adjacent anodes 111, the embodiment can reduce the difference between the area with the anode 111 and the area without the anode 111, and avoid the fracture of the cathode layer 17 when the cathode layer 17 is deposited on the whole surface. The embodiment makes the thickness of the filling layer 19 less than the thickness of the anode layer 11 to reserve the space for forming the blocking structure 18. The material of the filling layer 19 can be photoresist, silicon oxide, silicon nitride, silicon oxynitride, or other inorganic materials.

[0033] In an embodiment, the material of the second blocking layer 182 is different from the material of the first blocking layer 181, and the etching rate of the material of the second blocking layer 182 is less than the etching rate of the material of the first blocking layer 181.

[0034] It should be noted that the material of the first blocking layer 181 and the second blocking layer 182 can be silicon oxide, silicon nitride, silicon oxynitride, or other inorganic materials. The embodiment forms the inverted trapezoidal structure by making the etching rates of the second blocking layer 182 and the first blocking layer 181 different under the same etching gas or etching liquid. Specifically, the etching rate of the second blocking layer 182 is less than the etching rate of the first blocking layer 181, so that the second blocking layer 182 etches relatively slowly, and the width of the fourth blocking part 1822 is greater than the width of the second blocking part 1812, so that the hole transport layer 13 is disconnected at this position.

[0035] In an embodiment, the display panel further comprises an organic light-emitting layer 15, an electron transport layer 16, and a cathode layer 17. The organic light-emitting layer 15 is located on the side of the hole transport layer 13 away from the anode layer 11. The electron transport layer 16 is located on the side of the organic light-emitting layer 15 away from the hole transport layer 13. The cathode layer 17 is located on the side of the electron transport layer 16 away from the organic light-emitting layer 15.

[0036] Next, please refer to Figure 2 The basic structure of another display panel provided by the embodiment of the present application is shown in FIG. 2, which is similar to the basic structure of the display panel shown in FIG. 1. Figure 1The display panel of the embodiment further comprises a hole injection layer 12 between the anode layer 11 and the hole transport layer 13; two of the blocking structures 18 are arranged between two adjacent anodes 111, and the hole injection layer 12 comprises a first injection part 121 and a second injection part 122 arranged at intervals, the first injection part 121 is between the anode 111 and the first transport part 131, and the second injection part 122 is between the blocking structure 18 and the second transport part 132.

[0037] It can be understood that, by arranging two blocking structures 18 stacked, the hole injection layer 12 is also broken at the blocking structure 18, forming the first injection part 121 and the second injection part 122 arranged at intervals, which can effectively prevent the holes from migrating laterally between adjacent pixel units, effectively avoid crosstalk between adjacent pixel units, improve the display effect, and the principle of breaking the hole injection layer 12 is described in the hole transport layer 13 of the embodiment, which will not be repeated here. Figure 1

[0038] In an embodiment, the planes where the ends of the two blocking structures 18 are located are perpendicular to the substrate layer 10. Specifically, the minimum connecting line (such as the dashed line in the figure) between the ends of the two blocking structures 18 is perpendicular to the plane where the substrate layer 10 is located. Figure 2

[0039] It can be understood that, by arranging the ends of the two blocking structures 18 on the same vertical line, when the hole injection layer 12 is evaporated, the evaporation material will only diffuse below the lower blocking structure 18, but not diffuse to the upper blocking structure 18, so that when the hole transport layer 13 is evaporated, the hole transport layer 13 can be broken at the upper blocking structure 18, thereby preventing the holes from migrating laterally between adjacent pixel units and avoiding crosstalk.

[0040] It should be noted that the two blocking structures 18 can be formed in one patterning process, so that the production cost can be saved.

[0041] Next, please refer to Figure 3 , which is a basic structure schematic diagram of another display panel provided by the embodiment of the present application, and Figure 2 ​​The display panel of the embodiment further comprises an exciton blocking layer 14 located on the side of the hole transport layer 13 away from the hole injection layer 12, specifically, the exciton blocking layer 14 is located between the organic light-emitting layer 15 and the hole transport layer 13; wherein three blocking structures 18 are arranged between the two adjacent anodes 111, the exciton blocking layer 14 comprises a fifth blocking part 141 and a sixth blocking part 142 arranged at intervals, the fifth blocking part 141 is located on the side of the first transport part 131 away from the first injection part 121, and the sixth blocking part 142 is located on the side of the second transport part 132 away from the second injection part 122.

[0042] It should be noted that, in order to improve the light-emitting efficiency, the hole-related film layer can be provided as three layers, and in the embodiment, the three blocking structures 18 are formed between the two adjacent anodes 111, so that the exciton blocking layer 14 is also broken at the blocking structure 18, and the fifth blocking part 141 and the sixth blocking part 142 are arranged at intervals, which can effectively prevent the holes from migrating laterally between adjacent pixel units, effectively avoid crosstalk between adjacent pixel units, improve the display effect, and the principle of breaking the exciton blocking layer 14 will be described in the following Figure 1 The principle of breaking the hole transport layer 13, which will not be described here.

[0043] In an embodiment, the planes where the end portions of the three blocking structures 18 are located are perpendicular to the substrate layer 10. Specifically, the minimum connecting line (such as the dashed line in Figure 3 ) between the end portions of the three blocking structures 18 is perpendicular to the plane where the substrate layer 10 is located.

[0044] It can be understood that, in the embodiment, the end portions of the three blocking structures 18 are located on the same vertical line, when the hole injection layer 12 is evaporated, the evaporation material will only diffuse below the lower blocking structure 18, but not diffuse to the middle blocking structure 18 and the upper blocking structure 18, so that when the hole transport layer 13 is evaporated, the hole transport layer 13 can be broken at the middle blocking structure 18, and when the exciton blocking layer 14 is evaporated, the exciton blocking layer 14 can be broken at the upper blocking structure 18, thereby preventing the holes from migrating laterally between adjacent pixel units and avoiding crosstalk.

[0045] It should be noted that the three blocking structures 18 can be formed in one patterning process, so that the production cost can be saved.

[0046] The embodiment of the present application further provides a display terminal comprising a terminal main body and the display panel described above, the terminal main body and the display panel are combined into one body, and the basic structure of the display panel will be described in the following Figures 1 to 3and related descriptions are not repeated here. The display terminal provided by the embodiment of the present application can be a product or component with a display function, such as a mobile phone, a tablet computer, a notebook computer, a television, a digital camera, a navigator, and the like.

[0047] In summary, the display panel provided by the embodiment of the present application comprises a substrate layer, an anode layer, and a hole transport layer. The anode layer is located on the substrate layer, and the anode layer comprises a plurality of anodes arranged in an array. The hole transport layer is located on the anode layer. At least one blocking structure is arranged between two adjacent anodes. The hole transport layer comprises a first transport part and a second transport part arranged at intervals. The first transport part is located on the anode, and the second transport part is located on the blocking structure. At least one blocking structure is arranged between two adjacent anodes, so that the hole transport layer is broken at the blocking structure to form the first transport part and the second transport part arranged at intervals. The horizontal migration of holes between adjacent pixel units can be effectively prevented, the crosstalk between adjacent pixel units can be effectively avoided, the display effect can be improved, and the technical problem that the carriers of the display panel in the prior art horizontally migrate between adjacent pixel units to cause crosstalk between adjacent pixel units is solved.

[0048] The display panel and the display terminal provided by the embodiment of the present application are described in detail above. It should be understood that the exemplary embodiments described herein should only be considered as descriptive, for helping to understand the method of the present application and its core idea, and should not be considered as limiting the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate layer; an anode layer located on the substrate layer, the anode layer comprising a plurality of anodes distributed in an array; a hole transport layer located on the anode layer; wherein at least one barrier structure is arranged between two adjacent anodes, and the hole transport layer comprises a first transport part and a second transport part arranged at intervals, the first transport part being located on the anode, and the second transport part being located on the barrier structure; the barrier structure comprises: a first barrier layer comprising a first barrier part and a second barrier part arranged in series, the first barrier part extending in a direction perpendicular to the light-out side of the display panel, and the second barrier part extending in the direction of the light-out side of the display panel; a second barrier layer located on the side surface of the first barrier layer away from the substrate layer, the second barrier layer comprising a third barrier part and a fourth barrier part arranged in series, the third barrier part being arranged in parallel with the first barrier part, and the fourth barrier part being arranged in parallel with the second barrier part; the material of the second barrier layer is different from that of the first barrier layer, and the etching rate of the material of the second barrier layer is lower than that of the material of the first barrier layer.

2. The display panel of claim 1, wherein: wherein, in the direction of the light-out side of the display panel, the width of the fourth barrier part is greater than or equal to the width of the second barrier part.

3. The display panel of claim 2, wherein, the vertical distance from the end of the fourth barrier part away from the third barrier part to the substrate layer is greater than the vertical distance from the first transport part to the substrate layer.

4. The display panel of claim 3, wherein, the end of the first transport part close to the second transport part is located on the side of the second barrier layer close to the substrate layer.

5. The display panel of claim 3, wherein, The display panel comprises a filling layer located between the barrier structure and the substrate layer; wherein in the direction of the light-out side of the display panel, the height of the filling layer is less than the height of the anode layer.

6. The display panel of claim 1, wherein, The display panel comprises a hole injection layer located between the anode layer and the hole transport layer; wherein two barrier structures are arranged between two adjacent anodes, and the hole injection layer comprises a first injection part and a second injection part arranged at intervals, the first injection part being located between the anode and the first transport part, and the second injection part being located between the barrier structure and the second transport part.

7. The display panel of claim 6, wherein, The planes where the ends of the two barrier structures are located are perpendicular to the substrate layer.

8. The display panel of claim 6, wherein, The display panel comprises an exciton barrier layer located on the side of the hole transport layer away from the hole injection layer; wherein three barrier structures are arranged between two adjacent anodes, and the exciton barrier layer comprises a fifth barrier part and a sixth barrier part arranged at intervals, the fifth barrier part being located on the side of the first transport part away from the first injection part, and the sixth barrier part being located on the side of the second transport part away from the second injection part.

9. A display terminal, characterized by The terminal body and the display panel as claimed in any one of claims 1 to 8 are combined into one.

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