Organic light emitting display panel and display device

Abstract

Embodiments of the present application provide an organic light emitting display panel and a display device. The organic light emitting display panel comprises a display area and a non-display area surrounding the display area. The display area comprises a thin film transistor layer, an organic light emitting layer, a microlens array layer and a refractive index matching layer arranged in layers. The microlens array layer comprises a plurality of microlenses. The refractive index of the refractive index matching layer is different from that of the microlens array layer. The first surface of the microlens in contact with the refractive index matching layer is convex towards the one of the microlens array layer and the refractive index matching layer with a lower refractive index. The thin film transistor layer comprises a plurality of inorganic layers. The inorganic layers extend from the display area to the non-display area. The non-display area comprises a filling layer. The filling layer is arranged on the side of the inorganic layer close to the light emitting surface of the organic light emitting display panel. The material of the filling layer is the same as that of at least one of the microlens array layer and the refractive index matching layer. According to the embodiments of the present application, the filling layer is arranged in the non-display area, thereby leveling the thickness difference between the display area and the non-display area and simplifying the process flow.

Description

[0001] This application is a divisional application of application number 202010498769.6, filed on June 4, 2020, entitled "An Organic Light Emitting Display Panel and Display Device". [Technical Field]

[0002] This application relates to the field of display technology, and in particular to an organic light-emitting display panel and display device. [Background Technology]

[0003] Organic light-emitting diode (OLED) displays offer numerous advantages over liquid crystal displays (LCDs), including thinner and lighter designs, higher brightness, lower power consumption, faster response times, higher resolution, greater flexibility, and higher luminous efficiency, gradually becoming the mainstream display technology. The light-emitting principle of OLEDs involves holes generated at the anode and electrons at the cathode moving under the influence of an electric field. These electrons are injected into the hole transport layer and electron transport layer, respectively, and migrate to the organic light-emitting material layer. When these electrons meet in the light-emitting material layer, they generate excitons, which in turn excite the light-emitting molecules in the organic light-emitting material layer to produce visible light.

[0004] However, since the organic light-emitting device (OLED) is only located in the display area, and other film layers are also only located in the display area, there is a thickness difference between the display and non-display areas due to the different film layer configurations. This thickness difference may lead to the risk of breakage or damage to the film structure spanning the display and non-display areas during fabrication. For example, if the photoresist thickness in the non-display area is greater than that in the display area during signal line fabrication, the photoresist in the non-display area may not be completely cured during exposure. This results in the uncured photoresist that needs to be cured being developed away during development, which in turn leads to the etching away of the signal line portion that needs to be preserved during etching.

[0005] [Application Content]

[0006] In view of this, embodiments of this application provide an organic light-emitting display panel and a display device to solve the above problems.

[0007] In a first aspect, embodiments of this application provide an organic light-emitting display panel, including a display area and a non-display area surrounding the display area. The display area includes a thin-film transistor layer, an organic light-emitting layer, a microlens array layer, and a refractive index matching layer. The organic light-emitting layer is located on the side of the thin-film transistor layer closest to the light-emitting surface of the organic light-emitting display panel. The microlens array layer is located on the side of the organic light-emitting layer closest to the light-emitting surface of the organic light-emitting display panel. The refractive index matching layer is located on the side of the microlens array layer closest to the light-emitting surface of the organic light-emitting display panel. The organic light-emitting layer includes multiple light-emitting pixels, and the microlens array layer includes multiple microlenses, which are correspondingly arranged with the light-emitting pixels. The refractive index of the refractive index matching layer is different from that of the microlens array layer. The surface of the microlens that contacts the refractive index matching layer is a first surface, which is curved and protrudes towards the side of the microlens array layer and the refractive index matching layer with the lower refractive index. The thin-film transistor layer includes multiple inorganic layers extending from the display area to the non-display area. The non-display area includes a filling layer, which is located on the side of the inorganic layer closest to the light-emitting surface of the organic light-emitting display panel. The filling layer is made of the same material as at least one of the microlens array layer and the refractive index matching layer.

[0008] Secondly, embodiments of this application also provide an organic light-emitting display device, including the organic light-emitting display panel provided in the first aspect.

[0009] In the organic light-emitting display panel and display device provided in this application, by setting a filling layer in the non-display area, the thickness difference caused by the difference in film layers between the display area and the non-display area at the refractive index matching layer or the microlens array layer is filled, which is beneficial to the subsequent film layer or wiring fabrication and can ensure the fabrication yield. In addition, the filling layer in the non-display area is set in the same layer as at least one of the microlens array layer and / or the refractive index matching layer, so that the filling layer can be set simultaneously with the microlens array layer and / or the refractive index matching layer, simplifying the process flow. [Attached Image Description]

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A schematic diagram of an organic light-emitting display panel provided in an embodiment of this application;

[0012] Figure 2 A cross-sectional view of an organic light-emitting display panel provided in one embodiment of this application;

[0013] Figure 3A cross-sectional view of an organic light-emitting display panel provided for another embodiment of this application;

[0014] Figure 4 A cross-sectional view of an organic light-emitting display panel provided in yet another embodiment of this application;

[0015] Figure 5 A cross-sectional view of an organic light-emitting display panel is also provided in one embodiment of this application;

[0016] Figure 6 for Figures 2-5 A magnified view of a portion of the display area shown;

[0017] Figure 7 for Figure 2 A schematic diagram of the orthographic projection of the intermediate filling layer and the refractive index matching layer;

[0018] Figure 8 for Figure 3 A schematic diagram of the orthographic projection of the filling layer and the microlens array layer;

[0019] Figure 9 for Figure 4 A schematic diagram of the orthographic projection of the filling layer, the microlens array layer, and the refractive index matching layer;

[0020] Figure 10 A cross-sectional view of another organic light-emitting display panel provided in one embodiment of this application;

[0021] Figure 11 A cross-sectional view of yet another organic light-emitting display panel provided in one embodiment of this application;

[0022] Figure 12 A cross-sectional view of yet another organic light-emitting display panel provided for another embodiment of this application;

[0023] Figure 13 A cross-sectional view of yet another organic light-emitting display panel provided in yet another embodiment of this application;

[0024] Figure 14 A cross-sectional view of another organic light-emitting display panel provided in one embodiment of this application;

[0025] Figure 15 A cross-sectional view of yet another organic light-emitting display panel provided in another embodiment of this application;

[0026] Figure 16 A cross-sectional view of yet another embodiment of an organic light-emitting display panel provided in this application;

[0027] Figure 17 An equivalent circuit diagram of a multiplexer provided in an embodiment of this application;

[0028] Figure 18 A cross-sectional view of an organic light-emitting display panel provided for an embodiment of this application;

[0029] Figure 19 This is a schematic diagram of an organic light-emitting display device provided in an embodiment of this application.

Detailed Implementation Methods

[0030] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0032] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the description of this specification, it should be understood that the terms "substantially", "approximately", "about", "about", "generally", "largely" used in the claims and embodiments of this application refer to values ​​that can be generally agreed upon within a reasonable range of process operations or tolerances, rather than a precise value.

[0035] It should be understood that although terms such as "first," "second," etc., may be used to describe some structures in the embodiments of this application, these structures should not be limited to these terms. These terms are only used to distinguish these structures from each other. For example, without departing from the scope of the embodiments of this application, the first filling layer may also be referred to as the second filling layer, and similarly, the second filling layer may also be referred to as the first filling layer.

[0036] Through meticulous and in-depth research, the applicant in this case has provided a solution to the problems existing in the prior art.

[0037] Figure 1 This is a schematic diagram of an organic light-emitting display panel provided in an embodiment of this application. Figure 2 This is a cross-sectional view of an organic light-emitting display panel provided in one embodiment of this application. Figure 3 A cross-sectional view of an organic light-emitting display panel provided in another embodiment of this application. Figure 4 A cross-sectional view of an organic light-emitting display panel provided in another embodiment of this application. Figure 5 This application also provides a cross-sectional view of an organic light-emitting display panel according to an embodiment.

[0038] like Figure 1 As shown, the organic light-emitting display panel provided in this application embodiment includes a display area AA and a non-display area BB surrounding the display area AA, wherein the display area AA is the part that emits light for display, and the non-display area BB is the part that sets up the peripheral circuit.

[0039] like Figures 2-5 As shown, the display area AA includes a substrate 01, a thin-film transistor layer 02, an organic light-emitting layer, a microlens array layer 06, and a refractive index matching layer 07. The thin-film transistor layer 02 is disposed on one side of the substrate 01, the organic light-emitting layer is located on the side of the thin-film transistor layer 02 closest to the light-emitting surface of the organic light-emitting display panel, the microlens array layer 06 is located on the side of the organic light-emitting layer on the light-emitting surface of the organic light-emitting display panel, and the refractive index matching layer 07 is disposed on the side of the microlens array layer 06 closest to the light-emitting surface of the organic light-emitting display panel. That is, in the display area AA, the substrate 01, the thin-film transistor layer 02, the organic light-emitting layer, the microlens array layer 06, and the refractive index matching layer 07 are sequentially stacked along the direction from the substrate 01 to the light-emitting surface of the display panel.

[0040] Please continue to refer to this. Figures 2-5 The organic light-emitting layer includes multiple light-emitting pixels 03. Each light-emitting pixel 03 may include an anode 31, a cathode 32, and an organic light-emitting material layer 33 located between the anode 31 and the cathode 32. In addition, a hole transport layer 34 is also included between the anode 31 and the organic light-emitting material layer 33, and an electron transport layer 35 is also included between the cathode 32 and the organic light-emitting material layer 33.

[0041] Please continue to refer to this. Figures 2-5 The microlens array layer 06 includes multiple microlenses 61 / 62, wherein the microlenses 61 / 62 are correspondingly disposed with respect to the light-emitting pixels 03. For example, the orthographic projection of a microlens 61 corresponding to a light-emitting pixel 03 onto the substrate 01 surrounds the orthographic projection of the light-emitting pixel 03 onto the substrate 01, and / or the orthographic projection of a microlens 62 corresponding to a light-emitting pixel 03 onto the substrate 01 covers the orthographic projection of the light-emitting pixel 03 onto the substrate. Through the effect of the microlenses and the refractive index matching layer, large-angle light can be converted into small-angle light, thereby improving the light extraction efficiency of the light-emitting pixel 03; at the same time, it avoids color mixing problems caused by large-angle incident light onto other light-emitting pixels 03.

[0042] Please continue to refer to this. Figures 2-5 The refractive index matching layer 07 has a different refractive index than the microlens array layer 06. The surface of the microlenses 61 / 62 that contacts the refractive index matching layer 07 is a first surface. This first surface is curved and bulges towards the one with the lower refractive index between the microlens array layer 06 and the refractive index matching layer 07. For example, as... Figures 2-4 As shown, the refractive index of the microlens array layer 06 is less than that of the refractive index matching layer 07. Therefore, the first surface of the microlens 61 / 62 that contacts the refractive index matching layer 07 bulges in the direction of the microlens array layer 06, meaning that the microlenses 61 / 62 included in the microlens array layer 06 are concave lenses; Figure 5 As shown, the refractive index of the refractive index matching layer 07 is less than the refractive index of the microlens array layer 06. Therefore, the first surface of the microlens 61 / 62 that contacts the refractive index matching layer 07 protrudes in the direction of the refractive index matching layer 07. That is, the microlenses 61 / 62 included in the microlens array layer 06 are convex lenses. It should be noted that the technical solutions involved in the following embodiments are applicable to both situations.

[0043] Thin-film transistor layer 02 includes multiple inorganic layers and multiple metal layers, with the inorganic layers extending from the display area AA to the non-display area BB. For example... Figure 2 As shown, the thin-film transistor layer 02 includes multiple thin-film transistors 20. Each thin-film transistor 20 includes an active layer 21, a gate 22, and source / drain electrodes 23. A gate insulating layer 24 may be included between the active layer 21 and the gate 22, and an inter-insulating layer 25 may be included between the gate 22 and the source / drain electrodes 23. That is, the multiple inorganic layers included in the thin-film transistor layer 02 include a gate insulating layer 24 and an inter-insulating layer 25, and both the gate insulating layer 24 and the inter-insulating layer 25 extend from the display area AA to the non-display area BB. The multiple metal layers included in the thin-film transistor layer 02 include a metal layer disposed on the same layer as the gate 22 and a metal layer disposed on the same layer as the source / drain electrodes 23. It should be noted that the multiple inorganic layers included in the thin-film transistor layer 02 may also include other inorganic layers besides the gate insulating layer 24 and the inter-insulating layer 25, and these other inorganic layers may also extend from the display area AA to the non-display area BB.

[0044] Please continue to refer to this. Figures 2-5 The non-display area BB includes a filling layer 10, and the filling layer 10 is disposed on the side of the inorganic layer near the light-emitting surface of the organic light-emitting display panel. The filling layer 10 is made of the same material as at least one of the microlens array layer 06 and the refractive index matching layer 07. Figure 2 and Figure 5 As shown, the filling layer 10 may be made of the same material as the refractive index matching layer 07. It should be noted that... Figure 2 and Figure 5The filling pattern of the filling layer 10 in the middle layer is different from that of the refractive index matching layer 07. This is to distinguish the differences in their positions and structures, not to distinguish the differences in their materials. Figure 3 As shown, the filling layer 10 can also be made of the same material as the microlens array layer 06. It should be noted that... Figure 3 The filling pattern of the filling layer 10 in the microlens array layer 06 is different. This is to distinguish the differences in their positions and structures, not to distinguish the differences in their materials. Figure 4 As shown, the filling layer 10 includes a first filling layer 11 and a second filling layer 12 stacked together. The first filling layer 11 is made of the same material as the microlens array layer 06, and the second filling layer 12 is made of the same material as the refractive index matching layer 07. It should be noted that... Figure 4 The filling pattern of the filling layer 10 is different from that of the refractive index matching layer 07. This is to distinguish the differences in their positions and structures, not to distinguish the differences in their materials. The filling pattern of the filling layer 10 is different from that of the microlens array layer 06. This is to distinguish the differences in their positions and structures, not to distinguish the differences in their materials.

[0045] Since the number of film layers in the non-display area BB is less than that in the display area AA, for example, the non-display area BB does not include an organic light-emitting layer, there is a step difference between the non-display area BB and the display area AA along the thickness direction of the organic light-emitting display panel without the filling layer 10. This could cause the continuous structure simultaneously located in the display area AA and the non-display area BB to be discontinuous due to the step difference. For example, if a signal line needs to climb a slope between the display area AA and the non-display area BB, there is a risk of line breakage; similarly, if a slope is required between the display area AA and the non-display area BB, there is a risk of film breakage. By providing the filling layer 10 in the non-display area BB, the thickness step difference caused by the difference in film layers between the display area AA and the non-display area BB at the refractive index matching layer 07 or the microlens array layer 06 is filled, which is beneficial for the subsequent fabrication of film layers or wiring and can ensure the fabrication yield. Furthermore, if the filling layer 10 in the non-display area BB is disposed in the same layer as at least one of the microlens array layer 06 and / or the refractive index matching layer 07, then the filling layer 10 can be disposed simultaneously with the microlens array layer 06 and / or the refractive index matching layer 07, simplifying the process flow.

[0046] In one embodiment of this application, such as Figure 4As shown, the filling layer 10 includes a first filling layer 11 and a second filling layer 12 stacked together. The first filling layer 11 is made of the same material as the microlens array layer 06, and the second filling layer 12 is made of the same material as the refractive index matching layer 07. Furthermore, the refractive index of the microlens array layer 06 is greater than that of the refractive index matching layer 07, meaning the refractive index of the first filling layer 11 is greater than that of the second filling layer 12. Since the light emitted from the display area AA is not perfectly collimated, some light will be emitted from the display area AA to the non-display area BB. This portion of light has a large angle relative to the thickness direction of the display panel. If this large-angle light incident on the non-display area BB is to be emitted towards the light-emitting surface, it will first pass through the first filling layer 11 and then through the second filling layer 12, i.e., emitted from a denser medium to a less dense medium. Therefore, total internal reflection will occur, preventing light leakage from the non-display area BB.

[0047] Figure 6 for Figures 2-5 A magnified view of a portion of the display area shown.

[0048] like Figure 6 As shown, the microlens array layer 06 may include microlenses 61 surrounding the region where the light-emitting pixel 03 is located. That is, the orthographic projection of the microlens 61 onto the substrate 01 is outside the orthographic projection of the light-emitting pixel 03 onto the substrate 01, and surrounds the orthographic projection of the light-emitting pixel 03 onto the substrate 01. In addition, the refractive index matching layer 07 also covers the microlens 61, and the curved protrusion direction of the microlens 61 is towards the one with the lower refractive index between the microlens array layer 06 and the refractive index matching layer 07. Thus, the microlens 61 and the refractive index matching layer 07 can convert large-angle light into small-angle light through refraction and reflection.

[0049] The light emitted by the light-emitting pixel 03 is typically not collimated; that is, the light emitted by the light-emitting pixel 03 has a certain divergence angle. The divergence angle of the light emitted by the light-emitting pixel 03 and reaching its upper periphery is relatively large. Large-angle light has a high probability of total internal reflection or multiple refractions and dissipation, which affects the light extraction efficiency of the light-emitting pixel 03. A microlens 61 is disposed above the periphery of the light-emitting pixel 03. This microlens 61 can convert the large-angle light emitted by the light-emitting pixel 03 into small-angle light through reflection and refraction by the microlens 61 and the refractive index matching layer 07, allowing it to be emitted from above the microlens 61. This embodiment increases the light extraction amount around the light-emitting pixel 03 without changing the optical path of the light-emitting pixel 03's frontal viewing angle, thereby improving the light extraction efficiency of the display panel and reducing power consumption and lifespan. Furthermore, the microlens 61 in this embodiment can prevent color mixing caused by large-angle light entering adjacent light-emitting pixels.

[0050] Furthermore, the microlens layer 06 also includes a microlens 62 located above the light-emitting pixel 03, and the orthogonal projection of the microlens 62 onto the substrate 01 can cover the orthogonal projection of the light-emitting pixel 03 onto the substrate 01. Additionally, the refractive index matching layer 07 also covers the microlens 62, and the curved protrusion direction of the microlens 62 is also towards the lower refractive index of the microlens array layer 06 and the refractive index matching layer 07. Thus, the microlens 62 and the refractive index matching layer 07 can convert at least a portion of the large-angle light at the location of the light-emitting pixel 03 into small-angle light, avoiding total internal reflection and thereby improving light extraction efficiency.

[0051] Furthermore, among the microlenses 61 and 62 corresponding to the same light-emitting pixel 03, the surface height of microlens 61 can be greater than that of microlens 62. Therefore, the refraction amplitude of light by microlens 61 is greater than that by microlens 62, meaning the degree of change in the angle of light by microlens 61 is greater than that by microlens 62. Since the probability of large-angle light appearing at the location corresponding to light-emitting pixel 03 is relatively low, and the maximum angle of large-angle light at this location is usually smaller than the maximum angle of large-angle light at other locations, microlens 62, while converting large-angle light into small-angle light, will not significantly change the angle of the small-angle light, thus avoiding light divergence at the viewing angle and affecting the display effect.

[0052] Figure 7 for Figure 2 Orthographic projection diagram of the intermediate filling layer and the refractive index matching layer. Figure 8 for Figure 3 A schematic diagram of the orthographic projection of the filling layer and the microlens array layer. Figure 9 for Figure 4 A schematic diagram of the orthographic projection of the filling layer, microlens array layer, and refractive index matching layer. (See diagram below.) Figures 2-5 , Figures 7-9 As shown, the orthographic projection of at least one of the microlens array layer 06 and the refractive index matching layer 07 onto the light-emitting surface of the display panel is adjacent to the orthographic projection of the filling layer 10 onto the light-emitting surface of the display panel. In the embodiments of this application, the light-emitting surface of the display panel is the surface of the display panel that comes into contact with the external environment. For example, if the display panel includes a glass cover plate located on the uppermost side, then the light-emitting surface of the display panel can be considered as the surface where the glass cover plate is located.

[0053] Please combine Figure 2 and Figure 7 When the filling layer 10 is made of the same material as the refractive index matching layer 07, the orthographic projection of the filling layer 10 onto the light-emitting surface of the display panel is adjacent to the orthographic projection of the refractive index matching layer 07 onto the light-emitting surface of the display panel. This can be understood as the filling layer 10 actually being the portion of the refractive index matching layer 07 extending from the display area AA to the non-display area BB, meaning both are fabricated simultaneously.

[0054] Please combine Figure 3 and Figure 8 When the filling layer 10 is made of the same material as the microlens array layer 06, the orthographic projection of the filling layer 10 onto the light-emitting surface of the display panel is adjacent to the orthographic projection of the microlens array layer 06 onto the light-emitting surface of the display panel. This can be understood as the filling layer 10 actually being the portion of the microlens array layer 06 extending from the display area AA to the non-display area BB, meaning both are fabricated simultaneously.

[0055] Please combine Figure 4 and Figure 9 When the filling layer 10 includes a first filling layer 11 and a second filling layer 12 made of the same material as the microlens array layer 06 and the refractive index matching layer 07, respectively, the orthographic projection of the first filling layer 11 on the light-emitting surface of the display panel is adjacent to the orthographic projection of the microlens array layer 06 on the light-emitting surface of the display panel, and the orthographic projection of the second filling layer 12 on the light-emitting surface of the display panel and the orthographic projection of the refractive index matching layer 07 on the light-emitting surface of the display panel are adjacent. It can be understood that the first filling layer 11 in the filling layer 10 is actually the portion of the microlens array layer 06 extending from the display area AA to the non-display area BB, i.e., both are fabricated simultaneously; the second filling layer 12 in the filling layer 10 is actually the portion of the refractive index matching layer 07 extending from the display area AA to the non-display area BB, i.e., both are fabricated simultaneously.

[0056] It should be noted that, since the filling layer 10 is to fill the step difference between the non-display area BB and the display area AA, and the filling layer 10 should have a flat surface, the filling layer 10 can be made of a free-flowing organic material, such as OCA adhesive. Correspondingly, one of the microlens array layer 06 and the refractive index matching layer 07 is OCA adhesive.

[0057] Figure 10 This is a cross-sectional view of another organic light-emitting display panel provided in one embodiment of this application. Figure 10 As shown, when the filling layer 10 includes a first filling layer 11 and a second filling layer 12, the contact surface between the first filling layer 11 and the second filling layer 12 is a second surface, and the second surface is uneven. The uneven structure of the second surface can be substantially the same as the shape of the first surface in the display area. Furthermore, the unevenness of the second surface can be determined by the uneven design of the first filling layer 11, so the first filling layer 11 can form an uneven structure when forming microlenses 61 / 62 in the microlens array layer 06.

[0058] By setting the contact surface between the first filling layer 11 and the second filling layer 12 to an uneven structure, the bonding reliability between the first filling layer 11 and the second filling layer 12 can be increased; at the same time, the path for external water and oxygen to enter the display area AA from the non-display area BB can be increased, thereby preventing the devices in the display area AA from being corroded by water and oxygen and ensuring the reliability of the organic light-emitting display panel.

[0059] Figure 11 This is a cross-sectional view of yet another organic light-emitting display panel provided in one embodiment of this application. Figure 12 A cross-sectional view of yet another organic light-emitting display panel provided for another embodiment of this application. Figure 13 This is a cross-sectional view of yet another organic light-emitting display panel provided in another embodiment of this application.

[0060] like Figures 11-13 As shown, the organic light-emitting display panel provided in this embodiment further includes an encapsulation layer 05 located between the organic light-emitting layer and the microlens array layer 06. The encapsulation layer 05 includes at least a first inorganic layer 51, a first organic layer 52, and a second inorganic layer 53 stacked sequentially. The encapsulation layer 05 can prevent external water and oxygen from corroding the organic light-emitting layer.

[0061] Encapsulation layer 05 extends from the display area AA to a portion of the non-display area BB. Please refer to the following documentation. Figure 11-12 The non-display area BB also includes a barrier 20 surrounding the display area AA. The barrier 20 can block the transmission path of external water and oxygen, ensuring the reliability of the organic light-emitting display panel. The first organic layer 52 in the encapsulation layer 05 extends from the display area AA to the area between the barrier 20 and the display area AA. That is, when the encapsulation layer 05 extends from the display area AA to the non-display area BB, the first organic layer 52 stops before reaching the barrier 20.

[0062] like Figure 11-12 As shown in the embodiment of this application, the inorganic layer in the non-display area BB includes a second via 30, and the second via 30 is disposed on the side of the barrier 20 away from the display area AA. Since the inorganic layer is relatively brittle, it is prone to cracking during the cutting process to form the organic light-emitting display panel. By providing the second via 30 in the inorganic layer of the non-display area BB, the via 30 can prevent cracks from extending to the display area AA.

[0063] Please refer to Figure 11 The non-display area BB also includes a third filler structure 40, which is an organic material. Furthermore, the third filler structure 40 is disposed within the second via 30 included in the inorganic layer of the non-display area BB. At least one of the first inorganic layer 51 and the second inorganic layer 53 in the encapsulation layer 05 extends from the display area AA to the non-display area BB and covers the third filler structure 40. By providing an organic filler structure within the second via 30, the risk of cracks extending towards the display area AA can be more effectively prevented.

[0064] Please continue to refer to this. Figure 11The display area AA also includes a planarization layer 001, which is disposed between the organic light-emitting layer and the thin-film transistor layer 02. The planarization layer 001 can provide a flat bearing surface for the organic light-emitting layer. In one embodiment of this application, the third filling structure 40 is made of the same material as the planarization layer 001, so the third filling structure 40 can be fabricated simultaneously with the planarization layer 001.

[0065] like Figure 12 As shown, one of the first inorganic layer 51 or the second inorganic layer 53 extends from the display area AA to the space between the second via 30 and the baffle 20 and terminates between the second via 30 and the baffle 20. A filling layer 10 is provided in the second via 30.

[0066] In one embodiment of this application, such as Figure 12 As shown, when the filling layer 10 and the refractive index matching layer 07 are made of the same material, a portion of the filling layer 10 fills the second via 30. That is, the refractive index matching layer 07 fills the second via 30 while extending from the display area AA to the non-display area BB, simplifying the process. In one embodiment of this application, when the filling layer 10 and the microlens array layer 06 are made of the same material, a portion of the filling layer 10 can still fill the second via 30. That is, the microlens array layer 06 fills the second via 30 while extending from the display area AA to the non-display area BB, further simplifying the process.

[0067] In one embodiment of this application, such as Figure 13 As shown, when the filling layer 10 includes a first filling layer 11 and a second filling layer 12 made of the same material as the microlens array layer 06 and the refractive index matching layer 07, the first filling layer 11 can be disposed in the second via 30, while the second filling layer 12 covers the first filling layer 11.

[0068] Figure 14 This is a cross-sectional view of another organic light-emitting display panel provided in one embodiment of this application. Figure 15 A cross-sectional view of yet another organic light-emitting display panel provided in another embodiment of this application. Figure 16 A cross-sectional view of yet another organic light-emitting display panel provided in another embodiment of this application.

[0069] like Figure 14-15 As shown, in the organic light-emitting display panel provided in this embodiment, the filling layer 10 further includes a first via 50, and a first filling structure 60 is disposed within the first via 50. Wherein, as Figure 14-15 As shown, the first via 50 can penetrate the fill layer 10 and can surround the display area AA.

[0070] In one embodiment of this application, the first filling structure 60 filling the first via 50 can be an inorganic insulating material. That is, if the filling layer 10 has a first filling structure made of inorganic insulating material that extends through its thickness and surrounds the display area AA, then the filling layer 10 and the first filling structure 60 together effectively block water and oxygen from diffusing from the filling layer 10 to the display area AA.

[0071] In one embodiment of this application, the first filling structure 60 filling the first via 50 can also be a conductive material, so that the first filling structure 60 can electrically conduct the conductive structures above and below the filling layer 10.

[0072] When the first filling structure 60 is a conductive material, the first filling structure 60 can be silver paste. If the filling layer 10 is thicker, the corresponding first via 50 is deeper. Since the silver paste has good fluidity, it can be reliably filled in the first via 50 without the risk of breakage.

[0073] like Figure 15-16 As shown, when the filling layer 10 includes a first filling layer 11 and a second filling layer 12 made of the same materials as the microlens array layer 06 and the refractive index matching layer 07, respectively, the first via 50 may include a first sub-via 51 penetrating the first filling layer 11 and a second sub-via 52 penetrating the second sub-filling layer 12, and the first filling structure 60 may include a first sub-filling structure 61 and a second sub-filling structure 62. The first sub-filling structure 61 is disposed within the first sub-via 51, and the second sub-filling structure 62 is disposed within the second sub-via 52. Furthermore, when the first filling structure 60 is a conductive material, the corresponding first sub-filling structure 61 and second filling structure 62 are also conductive materials.

[0074] Please continue to refer to this. Figure 15 and Figure 16 When both the first sub-filling structure 61 and the second sub-filling structure 62 are conductive materials, a conductive block 70 can also be provided between the first filling layer 11 and the second filling layer 12. One end of the conductive block 70 is electrically connected to the first sub-filling structure 61, and the other end is electrically connected to the second sub-filling structure 62. If the area of ​​the conductive block 70 is larger than the area of ​​the top surface of the first sub-filling structure 61 and the bottom surface of the second sub-filling structure 62, then due to the limitations of the process precision, such as... Figure 15 and Figure 16As shown, there may be misalignment between the first sub-via 51 and the second sub-via 52. Because the conductive block 70 has a large area, the top surface of the first sub-filling structure 61 can still contact the conductive block 70 even with significant process deviations. Similarly, the bottom surface of the second sub-filling structure 62 can also contact the conductive block 70 even with significant process deviations. That is, even if there is a misalignment between the first sub-via 51 and the second sub-via 52, the first sub-filling structure 61 and the second sub-filling structure 62 can still be electrically connected through the conductive block, thus achieving reliable electrical connection between the two.

[0075] Please continue to refer to this. Figure 16 In one embodiment of this application, the organic light-emitting display panel further includes a touch layer 08, which includes touch electrodes 81 and touch traces 82 electrically connected to the touch electrodes 81. The touch electrodes 81 are used to sense touch operations, and the touch traces 82 are used to transmit touch signals to the touch electrodes 81. It should be noted that the touch electrodes 81 can be used for self-capacitive touch or mutual-capacitive touch.

[0076] like Figure 16 As shown, the touch layer 08 is located on the side of the refractive index matching layer 07 near the light-emitting surface of the organic light-emitting display panel. That is, at least the refractive index matching layer 07 and a microlens array layer are disposed between the touch layer 08 and the organic light-emitting layer. Furthermore, an encapsulation layer 05 can also be disposed between the touch layer 08 and the organic light-emitting layer. This increases the distance between the touch electrode 81 in the touch layer 08 and the cathode 32 in the light-emitting pixel 03, reducing the parasitic capacitance between the touch electrode 81 and the cathode 32. In addition, the touch trace 82 extends from the display area AA to the non-display area BB. Since the touch layer 08 is located above the refractive index matching layer 07, the touch trace 82 in the non-display area BB is located above the filling layer 10. Therefore, there is no step difference when the touch trace 82 extends from the display area AA to the non-display area BB, ensuring the continuity of the touch trace 82.

[0077] In addition, the non-display area BB also includes a touch connection line 90 electrically connected to the touch trace 82, wherein the touch trace 82 and the touch connection line 90 are located in different film layers. Figure 16 It can be disposed on the same layer as at least one metal layer in the thin film transistor layer 02. For example, the touch trace 82 can be disposed on the same layer as the metal layer where the gate 22 is located, or it can be disposed on the same layer as the metal layer where the source / drain 23 is located. When the thin film transistor layer 02 also includes other metal layers, the touch trace 82 can also be disposed on the same layer as other metal layers.

[0078] In one embodiment of this application, only a portion of the touch traces 82 can be electrically connected to the touch connection line 90 through the first filling structure 60. This allows the signal lines that provide signals to the touch electrode 81 to be arranged in two layers of traces, which can reduce the number of signal lines in the same layer in the non-display area BB, thereby reducing the width of the non-display area BB.

[0079] like Figure 16 As shown, the touch connection line 90 is disposed on the side of the filling layer 10 away from the light-emitting surface of the organic light-emitting display panel, and the touch trace 82 is disposed on the side of the filling layer 10 close to the light-emitting surface of the organic light-emitting display panel. Specifically, the touch trace 82 and the touch connection line 90 are electrically connected as follows: the touch trace 82 is electrically connected to one end of the first filling structure 60, and the touch connection line 90 is electrically connected to the other end of the first filling structure 60.

[0080] When the filling layer 10 includes a first filling layer 11 and a second filling layer 12, and the first filling structure 60 includes a first sub-filling structure 61 and a second sub-filling structure 62, the touch trace 82 can be electrically connected to the second sub-filling structure 62, and the touch connection line 61 can be electrically connected to the first sub-filling structure 61.

[0081] In one embodiment of this application, the non-display area BB includes multiple multiplexers 80, and the display area AA includes multiple thin-film transistors 20. The multiplexers 80 and the thin-film transistors 20 are disposed on the same layer. Since the touch layer 08 and the thin-film transistor layer 02 include a microlens array layer 06 and a refractive index matching layer 07, a filling layer 10 is disposed between the touch trace 82 and the multiplexers 80. Since the multiplexers 80 can control signals to be input or output from the touch trace 82, the touch trace 82 should be electrically connected to the output terminal of the multiplexers 80. In this embodiment, the touch connection line 90 can be disposed on the same layer as the output terminal of the multiplexers 80 and electrically connected, thereby realizing the electrical connection between the touch trace 82 and the output terminal of the multiplexers 80.

[0082] Figure 17 An equivalent circuit diagram of a multiplexer provided in an embodiment of this application.

[0083] like Figure 17 As shown, the multiplexer 80 includes one input terminal IN and multiple output terminals OUT, and the multiplexer 80 includes multiple control terminals, which control the signal at the input terminal IN to be transmitted to different output terminals in a time-division manner. Figure 17 As shown, control terminal CKV1 can control the transmission of the signal from input terminal IN to the leftmost output terminal OUT; control terminal CKV2 can control the transmission of the signal from input terminal IN to the middle output terminal OUT; and control terminal CKV3 can control the transmission of the signal from input terminal IN to the rightmost output terminal OUT. It should be noted that... Figure 16 The cross-sectional view shown includes the structure corresponding to one input / output channel of the multiplexer 80. Please refer to... Figure 16 and Figure 17 One output terminal OUT is electrically connected to one touch connection line 90, and multiple output terminals OUT can be electrically connected to different touch connection lines 90. By setting the multiplexer switch 80, the number of signal lines transmitting signals to the touch trace 82 can be reduced, that is, the number of signal lines is reduced to the number of signal lines connected to the input terminal IN, which can reduce the width of the non-display area BB.

[0084] Figure 18 A cross-sectional view of another organic light-emitting display panel provided in an embodiment of this application.

[0085] like Figure 18 As shown, the organic light-emitting display panel provided in this embodiment further includes a color resist layer 09, which includes a color resist 91 and a black matrix 92. The color resist layer 09 is located on the side of the refractive index matching layer 07 near the light-emitting surface of the organic light-emitting display panel. By placing the color resist layer 09 on top of the microlens array layer 06 and the refractive index matching layer 07, the risk of film breakage caused by the thickness difference in the film layer extending to the non-display area BB in the color resist layer 09 is avoided.

[0086] The black matrix 92 extends from the display area AA to the non-display area BB. By extending the black matrix 92 from the display area AA to the non-display area BB, the risk of light leakage in the non-display area BB can be avoided.

[0087] Please continue to refer to this. Figure 18 The color resist 91 includes at least three colors, and each color resist 91 is configured in a one-to-one correspondence with a light-emitting pixel 03 of the same color. For example, the red color resist 91 corresponds to a red-emitting pixel 03, the green color resist 91 corresponds to a green-emitting pixel 03, and the blue color resist 91 corresponds to a blue-emitting pixel 03. The orthographic projection of the color resist 91 onto the organic light-emitting layer covers the light-emitting pixels 03, and the orthographic projection of the black matrix 92 onto the organic light-emitting layer is located between two adjacent light-emitting pixels 03. By setting color resists on the organic display panel, color purity can be improved without the need for a polarizer, and the light reflection problem caused by the polarizer is reduced.

[0088] Figure 19 This is a schematic diagram of an organic light-emitting display device provided in an embodiment of this application. The organic light-emitting display device provided in this application includes the organic light-emitting display panel provided in any of the above embodiments. Figure 19 As shown, the display device provided in this application embodiment can be a mobile phone. Alternatively, the display device provided in this application embodiment can also be a computer, television, or other display device. Figure 19As shown, the organic light-emitting display device provided in this application embodiment includes a display area AA corresponding to the organic light-emitting display panel and a non-display area BB corresponding to the organic light-emitting display panel.

[0089] By setting a filler layer 10 in the non-display area BB, the thickness difference caused by the inconsistency between the display area AA and the non-display area BB in the refractive index matching layer 07 or the microlens array layer 06 is filled, which is beneficial for the subsequent fabrication of film layers or wiring and can ensure the fabrication yield. In addition, if the filler layer 10 in the non-display area BB is set in the same layer as at least one of the microlens array layer 06 and / or the refractive index matching layer 07, the filler layer 10 can be set simultaneously with the microlens array layer 06 and / or the refractive index matching layer 07, simplifying the process flow.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An organic light emitting display panel, characterized in that, a display area and a non-display area; a thin film transistor layer, an organic light emitting layer, a microlens array layer and a refractive index matching layer, the organic light emitting layer is located on the side of the thin film transistor layer close to the light emitting surface of the organic light emitting display panel, the microlens array layer is located on the side of the organic light emitting layer close to the light emitting surface of the organic light emitting display panel, and the refractive index matching layer is located on the side of the microlens array layer close to the light emitting surface of the organic light emitting display panel; the organic light emitting layer comprises a plurality of light emitting pixels, the microlens array layer comprises a plurality of microlenses, and the refractive index of the refractive index matching layer is different from the refractive index of the microlens array layer; the thin film transistor layer comprises a plurality of inorganic layers, the inorganic layers extend from the display area to the non-display area; the non-display area comprises a filling layer, the filling layer is arranged on the side of the inorganic layer close to the light emitting surface of the organic light emitting display panel; the material of the filling layer is the same as that of at least one of the microlens array layer and the refractive index matching layer; the filling layer comprises a first filling layer and a second filling layer arranged in layers, the first filling layer is the same as the material of the microlens array layer, and the second filling layer is the same as the material of the refractive index matching layer. 2.The organic light emitting display panel of claim 1, wherein, The projection of at least one of the microlens array layer and the refractive index matching layer on the light emitting surface is adjacent to the projection of the filling layer on the light emitting surface.

3. The organic light emitting display panel of claim 1, characterized in that, the first filling layer comprises at least one first groove, and the first groove fills the refractive index matching layer.

4. The organic light emitting display panel of claim 1, characterized in that, the organic light emitting display panel further comprises an encapsulation layer and a barrier wall; the encapsulation layer is located between the organic light emitting layer and the microlens array layer, and at least comprises a first inorganic layer, a first organic layer and a second inorganic layer arranged in layers, the encapsulation layer extends from the display area to at least part of the non-display area; the barrier wall is located in the non-display area, and the first organic layer in the encapsulation layer extends from the display area to the area between the barrier wall and the display area.

5. The organic light emitting display panel of claim 4, characterized in that, at least one of the first inorganic layer and the second inorganic layer extends to a first position of the non-display area, and the filling layer extends to a second position of the non-display area, and the distance from the first position to the display area is less than the distance from the second position to the display area.

6. The organic light emitting display panel of claim 5, characterized in that, in the non-display area, the inorganic layer comprises a second groove located on the side of the barrier wall away from the display area; and at least one of the first inorganic layer and the second inorganic layer extends from the display area to between the second groove and the barrier wall.

7. The organic light emitting display panel of claim 5, characterized in that, In the non-display area, the inorganic layer comprises at least one second groove, the second groove is located on the side of the barrier wall away from the display area; at least one of the first inorganic layer and the second inorganic layer extends to the area where the second groove is located, and the at least one of the first inorganic layer and the second inorganic layer overlaps the second groove.

8. The OLED panel of claim 7, wherein, The distance from the second groove to the display area is less than the distance from the second position to the display area.

9. The OLED panel of claim 8, wherein, The filling layer comprises OCA glue, and part of the OCA glue fills the second groove.

10. The OLED panel of claim 5, wherein, In the non-display area, the inorganic layer comprises at least one second groove, the second groove is located on the side of the barrier wall away from the display area, and the first filling layer fills the second groove.

11. The OLED panel of claim 5, wherein, In the non-display area, the inorganic layer comprises at least one second groove, the second groove is located on the side of the barrier wall away from the display area; The non-display area further comprises a third filling structure, the second groove is provided with the third filling structure, and the third filling structure is an organic material.

12. The OLED panel of claim 11, wherein, The contact surface between the first filling layer and the second filling layer is a second surface, and the second surface is uneven.

13. The OLED panel of claim 1, wherein, The filling layer comprises a first via, the first via is filled with a first filling structure, and the first filling structure is a conductive material.

14. The OLED panel of claim 13, wherein, The first via comprises a first sub-via and a second sub-via, the first sub-via penetrates the first filling layer, and the second sub-via penetrates the second filling layer; The first filling structure comprises a first sub-filling structure and a second sub-filling structure, the first sub-filling structure is arranged in the first sub-via, and the second sub-filling structure is arranged in the second sub-via; A conductive block is arranged between the first filling layer and the second filling layer, and the conductive block electrically connects the first sub-filling structure and the second sub-filling structure.

15. The OLED panel of claim 14, wherein, The OLED panel further comprises a touch layer, the touch layer comprises a touch electrode and a touch trace electrically connected to the touch electrode, the touch layer is located on the side of the refractive index matching layer close to the light-out surface of the OLED panel, and the touch trace extends from the display area to the non-display area; The non-display area comprises a touch connection line, the touch connection line is arranged on the side of the filling layer away from the light-out surface of the OLED panel, the touch connection line is connected to the first sub-filling structure, and the touch trace is connected to the second sub-filling structure. 16.The organic light emitting display panel of claim 15, wherein, In the display area, the thin film transistor layer further comprises a plurality of metal layers, and the touch connection line is in the same layer as at least one of the metal layers of the thin film transistor layer. 17.The organic light emitting display panel of claim 15, wherein, The non-display area comprises a plurality of multiplexing switches, and the display area comprises a plurality of thin film transistors, the multiplexing switches are arranged in the same layer as the thin film transistors, the multiplexing switches comprise an input end and a plurality of output ends, and the plurality of output ends are respectively electrically connected to different touch connection lines. 18.The organic light emitting display panel of claim 1, wherein, The microlens surrounds the light emitting pixel, and the refractive index of the refractive index matching layer is greater than that of the microlens array layer.

19. A display device comprising: An organic light emitting display panel as claimed in any one of claims 1-18.

Images