Organic light emitting display device and manufacturing method thereof

Abstract

The embodiment of the present invention discloses an organic light-emitting display device and a manufacturing method thereof, the device includes a substrate and an organic light-emitting structure, the substrate includes a substrate, a first inorganic film layer and a second inorganic film layer stacked in sequence, and a first conductive layer arranged between the substrate and the second inorganic film layer, the organic light-emitting layer is arranged on a side of the second inorganic film layer away from the first inorganic film layer, the organic light-emitting display device also includes a second conductive layer, the second conductive layer and the first conductive layer are arranged in different layers, and the first conductive layer is electrically connected to the second conductive layer. In the embodiment of the present invention, the first conductive layer is electrically connected to the second conductive layer, so that the first conductive layer has a fixed potential or the movement path of the charge of the first conductive layer is increased, and the electric field of the first conductive layer is weakened, thereby avoiding affecting the display performance of the organic light-emitting display device.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display panels, and in particular to an organic light emitting display device and a manufacturing method thereof. Background Art

[0002] With the continuous development of organic light-emitting diode (OLED) display technology, OLED display devices are widely used due to their advantages such as good viewing angle and color saturation, autonomous light emission, fast response speed, etc. At present, in the substrate manufacturing process of OLED display devices, in order to reduce the probability of water and oxygen transmission and improve the water and oxygen barrier performance, a conductive layer is added between the substrate and the inorganic film layer before the subsequent process is carried out.

[0003] However, when the panel is lit, the electric field between other charged film layers will affect the charge distribution of the conductive layer, which will have an adverse effect on the display performance of the OLED display device. The problem of uneven charge distribution in the conductive layer affecting the display performance of the OLED display device needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide an organic light emitting display device and a manufacturing method thereof, so as to overcome the problem that the display performance of the OLED display device is affected by the uneven charge distribution of the conductive layer.

[0005] In order to achieve the above technical problems, the present invention adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides an organic light emitting display device, comprising:

[0007] Substrate and organic light emitting structure;

[0008] The substrate comprises a substrate, a first inorganic film layer and a second inorganic film layer which are stacked in sequence, and a first conductive layer which is arranged between the substrate and the second inorganic film layer;

[0009] The organic light emitting structure is arranged on a side of the second inorganic film layer away from the first inorganic film layer;

[0010] The organic light emitting display device further includes a second conductive layer, which is disposed in a different layer from the first conductive layer, and the first conductive layer is electrically connected to the second conductive layer.

[0011] Further, the second conductive layer is disposed between the first inorganic film layer and the second inorganic film layer; or,

[0012] The second conductive layer is disposed between the substrate and the first inorganic film layer; or,

[0013] The second conductive layer is disposed on a side of the second inorganic film layer away from the first inorganic film layer.

[0014] Furthermore, the organic light emitting display device further includes:

[0015] A functional layer, which is disposed on a side of the substrate adjacent to the organic light-emitting structure;

[0016] The functional layer includes at least one conductive film layer, and the second conductive layer is any conductive film layer.

[0017] Furthermore, the functional layer is a driving circuit layer.

[0018] Further, the driving circuit layer includes a gate layer, a source-drain layer and a capacitor plate layer;

[0019] The second conductive layer is the gate layer, the source-drain layer or the capacitor plate layer.

[0020] Furthermore, the organic light emitting display device further includes:

[0021] The functional layer is the peripheral display driving circuit.

[0022] Furthermore, the organic light-emitting structure includes an anode and a cathode; and the second conductive layer is the anode or the cathode.

[0023] Further, the first conductive layer includes at least two sub-conductive layers, and the maximum size of the sub-conductive layers along a direction parallel to the substrate is 1 μm-1000 μm.

[0024] Furthermore, along a direction parallel to the substrate, a maximum spacing between adjacent sub-conductive layers is 200 nm-1 mm.

[0025] Furthermore, the sub-conductive layer is circular or polygonal in shape.

[0026] Furthermore, the first conductive layer is disposed between the substrate and the first inorganic film layer, or the first conductive layer is disposed between the first inorganic film layer and the second inorganic film layer.

[0027] In a second aspect, an embodiment of the present invention further provides a method for manufacturing an organic light-emitting display device, the method comprising:

[0028] A substrate is provided; the substrate comprises a substrate, a first inorganic film layer and a second inorganic film layer which are stacked in sequence, and a first conductive layer which is arranged between the substrate and the second inorganic film layer;

[0029] An organic light-emitting structure is arranged on the substrate; the organic light-emitting structure is arranged on a side of the second inorganic film layer away from the first inorganic film layer;

[0030] A second conductive layer is provided; the second conductive layer and the first conductive layer are provided in different layers, and the first conductive layer is electrically connected to the second conductive layer.

[0031] The organic light-emitting display device provided by the embodiment of the present invention is electrically connected to the second conductive layer through the first conductive layer, so that the first conductive layer has a fixed potential or the movement path of the charge in the first conductive layer is increased, thereby reducing the influence of the electric field between other charged film layers on the charge distribution of the first conductive layer during the panel lighting process, weakening or eliminating the electric field of the first conductive layer, thereby reducing the influence of the first conductive layer on the display performance of the organic light-emitting display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of an organic light emitting display device provided by an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0036] Figure 5 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0037] Figure 6 is a plan view of a first conductive layer of an organic light emitting display device provided by an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0039] Figure 8 It is a flow chart of a method for manufacturing an organic light emitting display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] Figure 1 is a schematic diagram of an organic light emitting display device provided by an embodiment of the present invention. Figure 1The organic light-emitting display device provided by the embodiment of the present invention includes a substrate 1 and an organic light-emitting structure 2. The substrate 1 includes a substrate 11, a first inorganic film layer 12 and a second inorganic film layer 13 stacked in sequence, and a first conductive layer 14 arranged between the substrate 11 and the second inorganic film layer 13. The organic light-emitting structure 2 is arranged on a side of the second inorganic film layer 13 away from the first inorganic film layer 12. The organic light-emitting display device also includes a second conductive layer 15. The second conductive layer 15 and the first conductive layer 14 are arranged in different layers, and the first conductive layer 14 is electrically connected to the second conductive layer 15.

[0042] Among them, the second conductive layer 15 can be the original conductive film layer in the organic light-emitting display device or a newly added conductive film layer, which is not specifically limited in this embodiment. The second conductive layer 15 can be arranged inside the substrate 1, such as the first conductive layer 15 can be arranged between the substrate 11 and the first inorganic film layer 12, or between the first inorganic film layer 12 and the second inorganic film layer 13. The second conductive layer 15 can also be arranged outside the substrate 1, such as being arranged on the side of the second inorganic film layer 13 away from the first inorganic film layer 12, as long as the first conductive layer 14 and the second conductive layer 15 are arranged in different layers. In addition, the first conductive layer 14 and the second conductive layer 15 can be connected through vias or other conductive structures, which is not specifically limited in this embodiment.

[0043] Optionally, the first conductive layer 14 may be disposed between the substrate 11 and the first inorganic film layer 12, or the first conductive layer 14 may be disposed between the first inorganic film layer 12 and the second inorganic film layer 13. Exemplarily, the second conductive layer 15 and the first conductive layer 14 are disposed in different layers, the first conductive layer 14 is disposed between the substrate 11 and the first inorganic film layer 12, and the second conductive layer 15 may be disposed between the first inorganic film layer 12 and the second inorganic film layer 13, that is, the substrate 1 includes a substrate 11, a first conductive layer 14, a first inorganic film layer 12, a second conductive layer 15 and a second inorganic film layer 13 stacked in sequence; the first conductive layer 14 is disposed between the first inorganic film layer 12 and the second inorganic film layer 13, and the second conductive layer 15 may be disposed between the substrate 11 and the first inorganic film layer 12, that is, the substrate includes a substrate 11, a second conductive layer 15, a first inorganic film layer 12, a first conductive layer 14 and a second inorganic film layer 13 stacked in sequence. It should be noted that Figure 1 The case where the first conductive layer 14 is disposed between the substrate 11 and the first inorganic film layer 12 , and the second conductive layer 15 is disposed between the first inorganic film layer 12 and the second inorganic film layer 13 is exemplarily shown.

[0044] During the panel lighting process, the electric field between other charged film layers will affect the charge distribution of the first conductive layer 14. For example, the electric field between the cathode and the anode on the organic light-emitting structure 2 will affect the charge distribution on the first conductive layer 14, making the charge on the first conductive layer 14 regularly distributed and forming a new electric field, which will enhance or weaken the electric field strength between the cathode and the anode on the organic light-emitting structure 2, thereby affecting the display performance of the organic light-emitting display device. The second conductive layer 15 is arranged in a different layer from the first conductive layer 14, and the second conductive layer 15 is electrically connected to the first conductive layer 14. For example, when the second conductive layer 15 is an existing conductive film layer in the organic light-emitting display device, the second conductive layer 15 is electrically connected to the first conductive layer 14, and the first conductive layer 14 will have a fixed potential, and the external electric field will not affect it; when the second conductive layer 15 is a newly added conductive film layer, the second conductive layer 15 increases the area of ​​the first conductive layer 14, so that the path of charge movement increases, and a larger external electric field is required to reach the electric field strength formed by the charge movement of the original first conductive layer 14, thereby reducing the influence of the electric field between other charged film layers in the display device on the charge distribution on the first conductive layer 14. Therefore, by setting the first conductive layer 14 to be connected to the second conductive layer 15, the influence of the external electric field on the charge distribution on the first conductive layer 14 can be weakened or eliminated, thereby avoiding the influence of the electric field formed by the first conductive layer 14 on the display performance of the organic light-emitting display device.

[0045] The organic light-emitting display device provided by the embodiment of the present invention is electrically connected to the second conductive layer through the first conductive layer, so that the first conductive layer has a fixed potential or the movement path of the charge in the first conductive layer is increased, thereby reducing the influence of the electric field between other charged film layers on the charge distribution of the first conductive layer during the panel lighting process, weakening or eliminating the electric field of the first conductive layer, thereby reducing the influence of the first conductive layer on the display performance of the organic light-emitting display device, and ensuring the display uniformity of the organic light-emitting display device.

[0046] Optionally, continue to see Figure 1 , the second conductive layer 15 is disposed between the first inorganic film layer 12 and the second inorganic film layer 13. Or, Figure 2 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention. Figure 2 The second conductive layer 15 is disposed between the substrate 11 and the first inorganic film layer 12 .

[0047] Exemplarily, a second conductive layer 15 is provided on the substrate 1, see Figure 1 , the substrate 11, the first conductive layer 14, the first inorganic film layer 12, the second conductive layer 15 and the second inorganic film layer 13 are arranged in sequence, or, see Figure 2, the substrate 11, the second conductive layer 15, the first inorganic film layer 12, the first conductive layer 14 and the second inorganic film layer 13 are arranged in sequence. By adding the second conductive layer 15 on the substrate 1, the second conductive layer 15 is electrically connected to the first conductive layer 14, so that the path of charge movement is increased, and a larger external electric field is required to reach the electric field strength formed by the charge movement of the original first conductive layer 14, thereby reducing the influence of the electric field between other charged film layers in the display device on the charge distribution on the first conductive layer 14, and avoiding the formation of a large electric field on the first conductive layer 14 to affect the display performance of the organic light-emitting display device. Alternatively, the excess charge on the first conductive layer 14 is conducted away by the second conductive layer 15, and the phenomenon that the excess charge on the first conductive layer 14 affects the display performance of the organic light-emitting display device due to the formation of an electric field is reduced, thereby improving the display uniformity of the organic light-emitting display device.

[0048] Optionally, the second conductive layer may also be disposed on a side of the second inorganic film layer away from the first inorganic film layer. The following is an explanation in conjunction with specific drawings:

[0049] Figure 3 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention. Figure 3 The organic light-emitting display device may further include a functional layer 3. The functional layer 3 may be disposed on a side of the substrate 1 adjacent to the organic light-emitting structure 2. The functional layer 3 includes at least one conductive film layer. The second conductive layer is any conductive film layer.

[0050] Specifically, the functional layer 3 can be arranged between the substrate 1 and the organic light-emitting structure 2. The functional layer 3 is a film layer that plays a display driving function in the organic light-emitting display device and can include one or more layers. The first conductive layer 14 and any conductive film layer of the functional layer 3 can be electrically connected through vias, so that the first conductive layer 14 has a fixed potential, and the external electric field will not affect it, thereby reducing the influence of the electric field formed by the charges on the first conductive layer 14 on the display performance.

[0051] Optionally, the functional layer 3 may be a driving circuit layer. Optionally, the driving circuit layer may include a gate layer, a source-drain electrode layer and a capacitor plate layer, and the second conductive layer 15 is a gate layer, a source-drain electrode layer or a capacitor plate layer.

[0052] Specifically, the driving circuit layer is used to provide a driving signal to the organic light emitting structure to drive the organic light emitting structure 2 to emit light. The driving circuit layer may include at least two thin film transistors and at least one capacitor.

[0053] The first conductive layer 14 is electrically connected to any one of the gate layer, source-drain layer or capacitor plate layer of the driving circuit layer so that the first conductive layer 14 has the same potential as the gate layer, source-drain layer or capacitor plate layer of the driving circuit layer. This can reduce the influence of the electric field generated by the first conductive layer 14 on the display performance during the lighting process without adding an additional film layer, thereby improving the uniformity and brightness of the picture and increasing the service life of the display device.

[0054] Optionally, the organic light emitting display device further includes a functional layer 3 which may be a peripheral display driving circuit.

[0055] Specifically, the peripheral display driving circuit can be electrically connected to the driving circuit layer to input a display driving signal to the driving circuit layer. For example, a power signal, a clock signal, or a scanning signal can be input to the driving circuit layer. The first conductive layer 14 is electrically connected to any conductive film layer of the peripheral display driving circuit, so that the first conductive layer 14 and the conductive film layer have the same potential. Without adding an additional film layer, the influence of the electric field generated by the first conductive layer 14 during the lighting process on the display performance is reduced, the uniformity and brightness of the picture can be improved, and the service life of the display device can be increased.

[0056] Optionally, Figure 4 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention. Figure 4 The organic light emitting structure 2 includes an anode 21 and a cathode 22 , and the second conductive layer 15 can be an anode or a cathode.

[0057] Specifically, the organic light-emitting structure 2 includes an anode 21 and a cathode 22, the second conductive layer 15 can be the anode 21 or the cathode 22, and the first conductive layer 14 is electrically connected to the anode 21 or the cathode 22, so that the first conductive layer 14 and the anode 21 or the cathode 22 have the same potential, and without adding an additional film layer, the influence of the electric field generated by the first conductive layer 14 on the display performance during the lighting process is reduced, the uniformity and brightness of the picture can be improved, and the service life of the display device can be increased. It should be noted that Figure 4 The organic light-emitting structure 2 is exemplarily drawn to include an anode 21 located on a side of the organic light-emitting structure 2 close to the functional layer 3 and a cathode 22 located on a side of the organic light-emitting structure 2 away from the functional layer 3. The above embodiment is not a limitation of the present invention. In other embodiments, the anode may also be located on a side of the organic light-emitting structure 2 away from the functional layer 3, and the cathode may also be located on a side of the organic light-emitting structure 2 close to the functional layer 3, which is not limited here.

[0058] Optionally, Figure 5 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention. Figure 6FIG. 1 is a plan view of a first conductive layer of an organic light emitting display device provided by an embodiment of the present invention. Figure 5 and Figure 6 The first conductive layer 14 includes at least two sub-conductive layers 16 , and the maximum dimension D1 of the sub-conductive layer 16 along a direction parallel to the substrate 11 is 1 μm-1000 μm.

[0059] Specifically, the first conductive layer 14 can be evenly separated into different independent areas through an etching process, that is, divided into multiple sub-conductive layers 16. The charge of each small area forms a closed interval. The electric field formed by each small area is relatively weaker than the electric field formed by the entire first conductive layer 14, and the display performance of the organic display device is relatively less affected, which can effectively improve the display performance. The sub-conductive layer 16 is a sub-unit of the first conductive layer 14. Each sub-conductive layer 16 is independent of each other and is located in the same layer, that is, the film layer where the first conductive layer 14 is located. The maximum size D1 of the sub-conductive layer 16 along the direction parallel to the substrate 11 is 1μm-1000μm. The size of the sub-conductive layer 16 can ensure that each sub-conductive layer 16 is as small as possible to meet the small change of the electric field of each sub-conductive layer under the action of the external electric field, thereby reducing the impact on the display.

[0060] Optionally, along a direction parallel to the substrate 11 , a maximum distance D2 between adjacent sub-conductive layers 16 is 200 nm-1 mm.

[0061] Specifically, the maximum spacing D2 of at least one sub-conductive layer 16 along the direction parallel to the substrate 11 ranges from 1 μm to 1000 μm. This arrangement can both ensure isolation between the sub-conductive layers and minimize the impact on the water and oxygen barrier properties of the first conductive layer.

[0062] Figure 7 is a schematic diagram of another organic light emitting display device provided by an embodiment of the present invention. Figure 7 , along the direction parallel to the substrate 11, the distances between adjacent sub-conductive layers 16 may be equal or different, Figure 7 The edges of adjacent sub-conductive layers 16 are exemplarily drawn as being oblique, and the inclination angle of etching is not limited.

[0063] Optionally, refer to Figure 6 The shape of the sub-conductive layer 16 can be circular or polygonal or any other shape that can support the normal display of the organic light emitting display device.

[0064] For example, if the sub-conductive layer 16 is circular, the maximum dimension of the sub-conductive layer 16 is the diameter; if the sub-conductive layer 16 is rectangular, the maximum dimension of the sub-conductive layer 16 is the length of the rectangle; the sub-conductive layer 16 can be other irregular shapes, which are not limited here. The shape of the sub-conductive layer 16 can be set as needed, as long as it can weaken the ability of the movement of excess charges to form a strong electric field.

[0065] The organic light-emitting display device provided by the embodiment of the present invention includes a substrate and an organic light-emitting structure, wherein the substrate includes a substrate, a first inorganic film layer and a second inorganic film layer stacked in sequence, and a first conductive layer disposed between the substrate and the second inorganic film layer, wherein at least one sub-conductive layer is disposed in the first conductive layer, and the charge of the first conductive layer is fixed in the region of the sub-conductive layer, and the charge of the first conductive layer is uniformly distributed as a whole, and the influence of the electric field generated during the lighting process on the entire layer is reduced, thereby reducing the influence of the electric field between other charged film layers on the charge distribution of the first conductive layer during the panel lighting process, weakening or eliminating the electric field of the first conductive layer, and thereby reducing the influence of the first conductive layer on the display performance of the organic light-emitting display device. The uniformity and brightness of the picture are improved, and the life of the display device is extended.

[0066] Figure 8 is a flow chart of a method for manufacturing an organic light emitting display device provided by an embodiment of the present invention. Figure 8 This embodiment also provides a method for manufacturing an organic light emitting display device, including:

[0067] Step 210, providing a substrate; the substrate includes a substrate, a first inorganic film layer and a second inorganic film layer stacked in sequence, and a first conductive layer disposed between the substrate and the second inorganic film layer.

[0068] Step 220 , disposing an organic light-emitting structure on the substrate; the organic light-emitting structure is disposed on a side of the second inorganic film layer away from the first inorganic film layer.

[0069] Step 230, providing a second conductive layer; the second conductive layer and the first conductive layer are provided in different layers, and the first conductive layer is electrically connected to the second conductive layer.

[0070] The method for manufacturing the organic light-emitting display device provided in this embodiment is used to manufacture the organic light-emitting display device provided in any embodiment of the present invention, and belongs to the same inventive concept as the organic light-emitting display device provided in any embodiment of the present invention, and has corresponding beneficial effects. For technical details not elaborated in this embodiment, please refer to the organic light-emitting display device provided in any embodiment of the present invention.

[0071] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An organic light emitting display device, characterized in that: include: Substrate and organic light emitting structure; The substrate comprises a substrate, a first inorganic film layer and a second inorganic film layer which are stacked in sequence, and a first conductive layer which is arranged between the substrate and the second inorganic film layer; The organic light emitting structure is arranged on a side of the second inorganic film layer away from the first inorganic film layer; The organic light emitting display device further includes a second conductive layer, the second conductive layer and the first conductive layer are arranged in a different layer, the first conductive layer and the second conductive layer are electrically connected, and the first conductive layer and the second conductive layer are not arranged adjacent to each other, so that the path for charge movement is increased; The second conductive layer is disposed between the first inorganic film layer and the second inorganic film layer; or, The second conductive layer is disposed between the substrate and the first inorganic film layer.

2. The organic light emitting display device according to claim 1, wherein: The first conductive layer is disposed between the substrate and the first inorganic film layer, or the first conductive layer is disposed between the first inorganic film layer and the second inorganic film layer.

3. A method for manufacturing an organic light-emitting display device, characterized in that: include: A substrate is provided; the substrate comprises a substrate, a first inorganic film layer and a second inorganic film layer which are stacked in sequence, and a first conductive layer which is arranged between the substrate and the second inorganic film layer; An organic light-emitting structure is arranged on the substrate; the organic light-emitting structure is arranged on a side of the second inorganic film layer away from the first inorganic film layer; A second conductive layer is provided; the second conductive layer and the first conductive layer are provided in different layers, the first conductive layer is electrically connected to the second conductive layer, and the first conductive layer and the second conductive layer are not provided adjacent to each other, so that the path for charge movement is increased; The second conductive layer is disposed between the first inorganic film layer and the second inorganic film layer; or, The second conductive layer is disposed between the substrate and the first inorganic film layer.

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