OLED display panel and OLED display device

Abstract

The present application provides an OLED display panel and an OLED display device; the OLED display panel includes a drainage line, the drainage line is arranged in the area between adjacent light-emitting units, the drainage line is arranged on the side of the hole layer away from the light-emitting layer, and the drainage line is connected to the hole layer. The present application arranges the drainage line, the drainage line is arranged in the area between adjacent light-emitting units, so that the drainage line leads the leakage current between adjacent light-emitting units through the hole layer and the drainage line, thereby preventing the closed light-emitting unit from being lit, and the drainage line is arranged on the side of the hole layer away from the light-emitting layer, thereby preventing the drainage line from contacting the electron layer and affecting the display.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an OLED display panel and an OLED display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to their self-luminescence and flexible display. In OLED display devices, red, blue and green sub-pixels emit light by stimulating different luminescent materials. However, during the display process, for example, when the red sub-pixel is stimulated, part of the current in the red sub-pixel is transmitted through the hole layer to other sub-pixels, such as the blue sub-pixel, causing the blue sub-pixel to also emit light, resulting in display abnormality.

[0003] Therefore, existing OLED display devices have a technical problem in which leakage current causes closed sub-pixels to be lit, thereby causing display abnormalities. Summary of the invention

[0004] The embodiments of the present application provide an OLED display panel and an OLED display device, which are used to alleviate the technical problem that leakage current in existing OLED display devices causes closed sub-pixels to be lit, thereby causing display abnormalities.

[0005] An embodiment of the present application provides an OLED display panel, the OLED display panel comprising:

[0006] substrate;

[0007] A driving circuit layer is arranged on one side of the substrate;

[0008] A pixel electrode layer is arranged on a side of the driving circuit layer away from the substrate;

[0009] A hole layer, arranged on a side of the pixel electrode layer away from the driving circuit layer;

[0010] A light-emitting layer, disposed on a side of the hole layer away from the pixel electrode layer, comprising a plurality of light-emitting units;

[0011] An electron layer, arranged on a side of the light-emitting layer away from the hole layer;

[0012] A common electrode layer is arranged on a side of the electronic layer away from the light-emitting layer;

[0013] The OLED display panel further includes a drainage line, which is arranged in a region between adjacent light-emitting units, and is arranged on a side of the cavity layer away from the light-emitting layer, and is connected to the cavity layer.

[0014] In some embodiments, the OLED display panel further includes a pixel definition layer, the pixel definition layer is disposed on a side of the hole layer away from the electron layer, the pixel definition layer is formed with a first groove, and the drainage wiring is disposed in the first groove.

[0015] In some embodiments, the thickness of the drainage line is greater than or equal to the thickness of the pixel definition layer, and the thickness of the drainage line is less than the sum of the pixel definition layer and the cavity layer.

[0016] In some embodiments, the thickness of the drainage line is smaller than the thickness of the pixel definition layer, and in the area where the drainage line is disposed, the hole layer is disposed in a groove of the pixel definition layer.

[0017] In some embodiments, the width of the drainage line ranges from one-half to two-thirds of the spacing between adjacent light-emitting units.

[0018] In some embodiments, the OLED display panel further includes a pixel definition layer, the driving circuit layer includes a planarization layer, the pixel definition layer is formed with a via, the planarization layer is formed with a second groove, and the drainage line is arranged in the via and the second groove.

[0019] In some embodiments, the driving circuit layer further includes an interlayer insulating layer, the interlayer insulating layer is formed with a third groove, the drainage line is arranged in the third groove, and passes through the second groove and the via hole to connect with the hole layer.

[0020] In some embodiments, the driving circuit layer further includes a source-drain layer, the source-drain layer includes the drainage line, and the drainage line passes through the third groove, the second groove and the via hole to connect with the hole layer.

[0021] In some embodiments, the light-emitting layer includes a plurality of light-emitting units arranged in an array, the drainage lines are arranged between the light-emitting units arranged transversely, and the drainage lines are arranged between the light-emitting units arranged longitudinally.

[0022] Meanwhile, an embodiment of the present application provides an OLED display device, which includes an OLED display panel and an electronic component, wherein the OLED display panel includes:

[0023] substrate;

[0024] A driving circuit layer is arranged on one side of the substrate;

[0025] A pixel electrode layer is arranged on a side of the driving circuit layer away from the substrate;

[0026] A hole layer, arranged on a side of the pixel electrode layer away from the driving circuit layer;

[0027] A light-emitting layer, disposed on a side of the hole layer away from the pixel electrode layer, comprising a plurality of light-emitting units;

[0028] An electron layer, arranged on a side of the light-emitting layer away from the hole layer;

[0029] A common electrode layer is arranged on a side of the electronic layer away from the light-emitting layer;

[0030] The OLED display panel further includes a drainage line, which is arranged in a region between adjacent light-emitting units, and is arranged on a side of the cavity layer away from the light-emitting layer, and is connected to the cavity layer.

[0031] Beneficial effects: The present application provides an OLED display panel and an OLED display device; the OLED display panel includes a substrate, a driving circuit layer, a pixel electrode layer, a hole layer, a light-emitting layer, an electron layer and a common electrode layer, the driving circuit layer is arranged on one side of the substrate, the pixel electrode layer is arranged on a side of the driving circuit layer away from the substrate, the hole layer is arranged on a side of the pixel electrode layer away from the driving circuit layer, the light-emitting layer is arranged on a side of the hole layer away from the pixel electrode layer, including a plurality of light-emitting units, the electron layer is arranged on a side of the light-emitting layer away from the hole layer, and the common electrode layer is arranged on a side of the electron layer away from the light-emitting layer, wherein the OLED display panel also includes a drainage routing, the drainage routing is arranged in a region between adjacent light-emitting units, the drainage routing is arranged on a side of the hole layer away from the light-emitting layer, and the drainage routing is connected to the hole layer. The present application sets a drainage routing, and the drainage routing is set in the area between adjacent light-emitting units, so that the drainage routing leads the leakage current between adjacent light-emitting units through the hole layer and the drainage routing, thereby preventing the closed light-emitting unit from being lit. The drainage routing is set on the side of the hole layer away from the light-emitting layer to avoid the drainage routing from contacting the electron layer and affecting the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0033] Figure 1 This is a first schematic diagram of an OLED display panel provided in an embodiment of the present application.

[0034] Figure 2 A second schematic diagram of an OLED display panel provided in an embodiment of the present application.

[0035] Figure 3 This is a third schematic diagram of the OLED display panel provided in an embodiment of the present application.

[0036] Figure 4 A schematic diagram of an OLED display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] In order to solve the technical problem that closed sub-pixels are lit due to leakage current in existing OLED display devices, thereby causing display abnormalities, the embodiments of the present application provide an OLED display panel and an OLED display device to alleviate the above technical problem.

[0039] like Figure 1 As shown, an embodiment of the present application provides an OLED display panel, the OLED display panel comprising:

[0040] Substrate 11;

[0041] A driving circuit layer 12 is disposed on one side of the substrate 11;

[0042] The pixel electrode layer 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11;

[0043] The hole layer 15 is arranged on a side of the pixel electrode layer 13 away from the driving circuit layer 12;

[0044] The light-emitting layer 16 is disposed on a side of the cavity layer 15 away from the pixel electrode layer 13 and includes a plurality of light-emitting units (for example, a red light-emitting unit 161);

[0045] The electron layer 17 is disposed on a side of the light-emitting layer 16 away from the hole layer 15;

[0046] A common electrode layer 19 is disposed on a side of the electronic layer 17 away from the light-emitting layer 16;

[0047] Among them, the OLED display panel also includes a drainage line 20, which is arranged in the area between adjacent light-emitting units (for example, a red light-emitting unit 161 and a green light-emitting unit 162), and the drainage line 20 is arranged on the side of the hole layer 15 away from the light-emitting layer 16, and the drainage line 20 is connected to the hole layer 15.

[0048] An embodiment of the present application provides an OLED display panel, which has drainage lines arranged in the area between adjacent light-emitting units, so that the drainage lines lead out the leakage current between the adjacent light-emitting units through the hole layer and the drainage lines, thereby preventing the closed light-emitting units from being lit. The drainage lines are arranged on the side of the hole layer away from the light-emitting layer, thereby preventing the drainage lines from contacting the electron layer and affecting the display.

[0049] In one embodiment, the other end of the drainage line is grounded. By grounding one end of the drainage line, the leakage current can be directly released to the ground, thereby preventing the leakage current from affecting the circuit, and the leakage current cannot be transmitted to adjacent sub-pixels, thereby preventing the closed sub-pixels from being lit.

[0050] The process of setting the drainage routing may affect other conductive layers or circuits. In one embodiment, Figure 1 As shown, the OLED display panel also includes a pixel definition layer 14, and the pixel definition layer 14 is arranged on the side of the hole layer 15 away from the electron layer 17. The pixel definition layer 14 is formed with a first groove, and the drainage wiring 20 is arranged in the first groove. By forming the first groove in the pixel definition layer and arranging the drainage wiring in the first groove, the drainage wiring can be directly in contact with the hole layer, and the leakage current of the hole layer can be guided to the drainage wiring to release the leakage current. And because the pixel definition layer is in direct contact with the hole layer in the non-luminous area, the process flow can be reduced by forming the first groove in the pixel definition layer and arranging the drainage wiring in the first groove.

[0051] It should be noted that in the embodiment of the present application, since the drainage routing or the hole layer is arranged in the first groove, the first groove is not shown in the accompanying drawings. The position of the first groove is determined according to the different film layers arranged in different embodiments. For example, if a drainage routing is arranged in the first groove, the position of the first groove is the setting position of the drainage routing.

[0052] In one embodiment, the thickness of the drainage line is greater than or equal to the thickness of the pixel definition layer, and the thickness of the drainage line is less than the sum of the pixel definition layer and the cavity layer.

[0053] Specifically, Figure 1 As shown, the thickness of the drainage wiring 20 is equal to the thickness of the pixel definition layer 14. Figure 3As shown, the thickness of the drainage line 20 is greater than the thickness of the pixel definition layer 14, and the thickness of the drainage line 20 is less than the sum of the thicknesses of the pixel definition layer 14 and the hole layer 15. By increasing the thickness of the drainage line, the impedance of the drainage line is reduced, so that the drainage line can better derive the leakage current, and in order to prevent the drainage line from affecting the normal operation of the circuit, the thickness of the drainage line is less than the sum of the thicknesses of the pixel definition layer and the hole layer, so as to prevent the drainage line from contacting the electron layer.

[0054] The problem that hole injection and transmission between adjacent sub-pixels causes a closed sub-pixel in an adjacent sub-pixel to be lit is addressed. In one embodiment, Figure 2 As shown, the thickness of the drainage wiring 20 is less than the thickness of the pixel definition layer 14, and in the area where the drainage wiring 20 is set, the hole layer 15 is set in the groove of the pixel definition layer 14. When setting the drainage wiring, by setting the drainage wiring in the groove of the pixel definition layer and making the hole layer fall into the pixel definition layer, when a fault occurs, the hole injection and transmission between sub-pixels can be blocked, further avoiding leakage current from causing the closed sub-pixel to be lit.

[0055] Specifically, Figure 2 , Figure 3 As shown, when the hole layer falls into the pixel definition layer, the corresponding electron layer can also fall downward into the groove formed by the hole layer, so that the thickness of the hole layer and the electron layer in each region remains consistent, so that the luminous effect of the sub-pixel remains unchanged. When the hole layer protrudes, the electron layer protrudes accordingly, so that the thickness of the hole layer and the electron layer in each region remains consistent, so that the luminous effect of the sub-pixel remains unchanged.

[0056] In one embodiment, if Figures 1 to 3 As shown, the OLED display panel also includes a light extraction layer 18. When the hole layer falls into the pixel definition layer, the corresponding light extraction layer can also fall downward into the groove of the electron layer, so that the thickness of the film layer in each area remains consistent, so that the luminous effect of the sub-pixel remains unchanged, and when the hole layer protrudes, the light extraction layer protrudes accordingly, so that the thickness of the hole layer and the electron layer in each area is consistent, so that the luminous effect of the sub-pixel remains unchanged, but considering that the drainage wiring is set in the non-luminous area, the light extraction layer can be kept flat without affecting the display effect.

[0057] When the width of the drainage routing is small, the leakage current will be transferred to the adjacent sub-pixel, resulting in the closed sub-pixel being lit. In one embodiment, the width range of the drainage routing is one-half to two-thirds of the spacing between adjacent light-emitting units. By setting the width range of the drainage routing to one-half to two-thirds of the spacing between adjacent light-emitting units, the width of the drainage routing is increased, so that the overlapping area of ​​the drainage routing and the hole layer in the area between the adjacent light-emitting units is increased, so that the drainage routing has a better drainage effect on the leakage current. In order to avoid the drainage routing affecting the normal operation of the pixel electrode layer, for example, the drainage routing is too wide to connect the adjacent pixel electrodes, which will make it impossible to control a single sub-pixel, so the width range of the drainage routing is set to the above range.

[0058] In one embodiment, the OLED display panel further includes a pixel definition layer, the drive circuit layer includes a planarization layer, the pixel definition layer is formed with a via, the planarization layer is formed with a second groove, and the drainage line is arranged in the via and the second groove. By forming the second groove in the planarization layer, forming a via in the pixel definition layer, arranging the drainage line in the second groove, and making the drainage line pass through the via in the pixel definition layer and connect to the hole layer, the leakage current can be led out through the drainage line to prevent the closed sub-pixel from being lit due to the leakage current.

[0059] In one embodiment, the driving circuit layer further includes an interlayer insulating layer, the interlayer insulating layer is formed with a third groove, the drainage line is arranged in the third groove, and passes through the second groove and the via hole to connect with the hole layer. When the drainage line is arranged, the drainage line can also be arranged in the third groove of the interlayer insulating layer, so that the drainage line is connected to the hole layer through the second groove and the via hole, so that the leakage current of the hole layer can be transferred to the drainage line, so as to avoid the leakage current causing the closed sub-pixel to be lit.

[0060] Regarding the problem that the drainage routing may affect the circuit. In one embodiment, the driving circuit layer also includes a source-drain layer, and the source-drain layer includes the drainage routing, and the drainage routing passes through the third groove, the second groove and the via hole to connect with the hole layer. By setting the drainage routing in the source-drain layer, the setting position of the drainage routing can be determined according to the layout of the source-drain layer, so as to avoid overlapping between other routings or electrodes of the source-drain layer and the drainage routing when setting the drainage routing, causing the drainage routing to affect the normal operation of the circuit. The drainage routing passes through the third groove, the second groove and the via hole to connect with the hole layer, so that the leakage current of the hole layer can be led out, so as to avoid the leakage current causing the closed sub-pixel to be lit.

[0061] Specifically, when forming the drainage routing, the drainage routing can be first formed in the source and drain layer, and then after forming the interlayer insulating layer, the planarizing layer and the pixel definition layer, a third groove, a second groove and a via are formed on the interlayer insulating layer, the planarizing layer and the pixel definition layer respectively, and the third groove, the second groove and the via are filled with conductive material, so that the drainage routing can pass through the third groove, the second groove and the via to connect with the hole layer, thereby conducting the leakage current.

[0062] The above embodiments are described in detail with the drainage lines being respectively arranged in the source and drain layer, the interlayer insulating layer and the pixel definition layer, but the embodiments of the present application are not limited to this. For example, the driving circuit layer also includes an active layer, a gate layer, and a gate insulating layer, and the drainage lines can also be arranged in the gate layer and the gate insulating layer.

[0063] In one embodiment, the light-emitting layer includes a plurality of light-emitting units arranged in an array, and the drainage wiring is arranged between the light-emitting units arranged laterally. A portion of the current of the illuminated sub-pixel will be laterally transmitted to the adjacent sub-pixel through the hole layer, causing the closed sub-pixel to be illuminated. By arranging the drainage wiring between the laterally arranged sub-pixels, the leakage current transmitted laterally is led away by the drainage wiring, thereby preventing the closed sub-pixel from being illuminated.

[0064] In one embodiment, the light-emitting layer includes a plurality of light-emitting units arranged in an array, and the drainage wiring is arranged between the light-emitting units arranged in a longitudinal direction. A portion of the current of the illuminated sub-pixel will be transmitted longitudinally to the adjacent sub-pixel, causing the closed sub-pixel to be illuminated. By setting the drainage wiring between the longitudinally arranged sub-pixels, the leakage current transmitted longitudinally is led away by the drainage wiring, thereby preventing the closed sub-pixel from being illuminated.

[0065] In one embodiment, the light-emitting layer includes a plurality of light-emitting units arranged in an array, the drainage lines are arranged between the light-emitting units arranged horizontally, and the drainage lines are arranged between the light-emitting units arranged vertically. By arranging drainage lines between the light-emitting units arranged horizontally and the light-emitting units arranged vertically, no matter whether the leakage current flows to the horizontal sub-pixel or the vertical sub-pixel, the leakage current can be led out through the drainage lines, thereby preventing the closed sub-pixel from being lit due to the leakage current.

[0066] Specifically, Figure 1 As shown, the light-emitting layer 16 includes a red light-emitting unit 161, a green light-emitting unit 162 and a blue light-emitting unit 163, and a first drainage wiring 201 is provided between the red sub-pixel corresponding to the red light-emitting unit 161 and the green sub-pixel corresponding to the green light-emitting unit 162, and a second drainage wiring 202 is provided between the green sub-pixel corresponding to the green light-emitting unit 162 and the blue sub-pixel corresponding to the blue light-emitting unit 163.

[0067] Specifically, in the design process of the OLED display panel, when the volume and shape of the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit are consistent, and the spacing between adjacent sub-pixels is consistent, the width and thickness of the first drainage line and the second drainage line can be set to be consistent. When the spacing between the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit is different, the width and thickness of the first drainage line and the second drainage line can be different. When the volume and shape of the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit are different, the width and thickness of the first drainage line and the second drainage line can also be different, so that the first drainage line and the second drainage line can lead out leakage current and avoid the first drainage line and the second drainage line from affecting the normal operation of the circuit.

[0068] In one embodiment, the material of the drainage wiring includes metal. Specifically, the material of the drainage wiring includes silver, copper, gold, aluminum, and molybdenum.

[0069] In one embodiment, the hole layer includes a hole transport layer, and the drainage routing is connected to the hole transport layer. When the hole layer is a hole transport layer, the drainage routing is contacted with or attached to the hole transport layer so that the drainage routing can lead out the leakage current of the hole transport layer, thereby preventing the leakage current from flowing into adjacent sub-pixels and causing the closed sub-pixels to be lit.

[0070] In one embodiment, the hole layer includes a hole injection layer and a hole transport layer, the hole transport layer is arranged on a side of the hole injection layer away from the pixel definition layer, and the drainage wiring is connected to the hole injection layer. By contacting or bonding the drainage wiring with the hole injection layer, the drainage wiring can lead out the leakage current between sub-pixels to prevent the closed sub-pixels from being lit.

[0071] In one embodiment, the electronic layer includes an electron transport layer, or the electronic layer includes an electron transport layer and an electron injection layer, and the electron injection layer is arranged on a side of the electron transport layer away from the light-emitting layer.

[0072] The above embodiment describes in detail how the drain line is connected to the hole layer to extract the leakage current. However, the present application is not limited thereto, and the drain line can also form a capacitor with the common electrode layer to extract the leakage current, thereby preventing the leakage current from affecting the normal opening and closing of the sub-pixel.

[0073] At the same time, if Figure 4 As shown, an embodiment of the present application provides an OLED display device, the OLED display device includes an OLED display panel and an electronic component 41, the OLED display panel includes:

[0074] Substrate 11;

[0075] A driving circuit layer 12 is disposed on one side of the substrate 11;

[0076] The pixel electrode layer 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11;

[0077] The hole layer 15 is arranged on a side of the pixel electrode layer 13 away from the driving circuit layer 12;

[0078] The light-emitting layer 16 is disposed on a side of the cavity layer 15 away from the pixel electrode layer 13 and includes a plurality of light-emitting units (for example, a red light-emitting unit 161);

[0079] The electron layer 17 is disposed on a side of the light-emitting layer 16 away from the hole layer 15;

[0080] A common electrode layer 19 is disposed on a side of the electronic layer 17 away from the light-emitting layer 16;

[0081] Among them, the OLED display panel also includes a drainage line 20, which is arranged in the area between adjacent light-emitting units (for example, a red light-emitting unit 161 and a green light-emitting unit 162), and the drainage line 20 is arranged on the side of the hole layer 15 away from the light-emitting layer 16, and the drainage line 20 is connected to the hole layer 15.

[0082] An embodiment of the present application provides an OLED display device, which includes an OLED display panel and an electronic component. The OLED display panel is provided with a drainage line, and the drainage line is provided in a region between adjacent light-emitting units, so that the drainage line leads out the leakage current between adjacent light-emitting units through a hole layer and the drainage line, thereby preventing a closed light-emitting unit from being lit. The drainage line is provided on a side of the hole layer away from the light-emitting layer, thereby preventing the drainage line from contacting the electron layer and affecting the display.

[0083] In one embodiment, the electronic component includes an under-screen camera.

[0084] According to the above embodiments, it can be known that:

[0085] The embodiments of the present application provide an OLED display panel and an OLED display device; the OLED display panel includes a substrate, a driving circuit layer, a pixel electrode layer, a hole layer, a light-emitting layer, an electron layer and a common electrode layer, the driving circuit layer is arranged on one side of the substrate, the pixel electrode layer is arranged on the side of the driving circuit layer away from the substrate, the hole layer is arranged on the side of the pixel electrode layer away from the driving circuit layer, the light-emitting layer is arranged on the side of the hole layer away from the pixel electrode layer, and includes a plurality of light-emitting units, the electron layer is arranged on the side of the light-emitting layer away from the hole layer, and the common electrode layer is arranged on the side of the electron layer away from the light-emitting layer, wherein the OLED display panel also includes a drainage routing, the drainage routing is arranged in the area between adjacent light-emitting units, the drainage routing is arranged on the side of the hole layer away from the light-emitting layer, and the drainage routing is connected to the hole layer. The present application sets a drainage routing, and the drainage routing is set in the area between adjacent light-emitting units, so that the drainage routing leads the leakage current between adjacent light-emitting units through the hole layer and the drainage routing, thereby preventing the closed light-emitting unit from being lit. The drainage routing is set on the side of the hole layer away from the light-emitting layer to avoid the drainage routing from contacting the electron layer and affecting the display.

[0086] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] The above is a detailed introduction to an OLED display panel and an OLED display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An OLED display panel, characterized in that: include: substrate; A driving circuit layer is arranged on one side of the substrate; A pixel electrode layer is arranged on a side of the driving circuit layer away from the substrate; A hole layer, arranged on a side of the pixel electrode layer away from the driving circuit layer; A light-emitting layer, disposed on a side of the hole layer away from the pixel electrode layer, comprising a plurality of light-emitting units; An electron layer, arranged on a side of the light-emitting layer away from the hole layer; A common electrode layer is arranged on a side of the electronic layer away from the light-emitting layer; The OLED display panel further comprises a drainage line, wherein the drainage line is arranged in a region between adjacent light-emitting units, the drainage line is arranged on a side of the cavity layer away from the light-emitting layer, and the drainage line is connected to the cavity layer; The OLED display panel also includes a pixel definition layer, the driving circuit layer includes a planarization layer, an interlayer insulating layer and a source-drain layer, the pixel definition layer is formed with a via, the planarization layer is formed with a second groove, the interlayer insulating layer is formed with a third groove, the source-drain layer includes the drainage line, and the drainage line passes through the third groove, the second groove and the via to be connected to the hole layer.

2. The OLED display panel according to claim 1, wherein: The width of the drainage wiring ranges from one half to two thirds of the spacing between adjacent light emitting units.

3. The OLED display panel according to claim 1, wherein: The light-emitting layer includes a plurality of light-emitting units arranged in an array, the drainage lines are arranged between the light-emitting units arranged in a transverse direction, and the drainage lines are arranged between the light-emitting units arranged in a longitudinal direction.

4. An OLED display device, characterized in that: The method comprises an OLED display panel and an electronic component as claimed in any one of claims 1 to 3, wherein the OLED display panel comprises: substrate; A driving circuit layer is arranged on one side of the substrate; A pixel electrode layer is arranged on a side of the driving circuit layer away from the substrate; A hole layer, arranged on a side of the pixel electrode layer away from the driving circuit layer; A light-emitting layer, disposed on a side of the hole layer away from the pixel electrode layer, comprising a plurality of light-emitting units; An electron layer, arranged on a side of the light-emitting layer away from the hole layer; A common electrode layer is arranged on a side of the electronic layer away from the light-emitting layer; The OLED display panel further includes a drainage line, which is arranged in a region between adjacent light-emitting units, and is arranged on a side of the cavity layer away from the light-emitting layer, and is connected to the cavity layer.

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