Organic light emitting display device and near-eye display device

Abstract

The present invention provides an organic light-emitting display device, comprising an array substrate, a plurality of organic light-emitting display units arranged on the array substrate, the organic light-emitting display unit comprising an anode, and a pixel definition layer arranged around the anode; the pixel definition layer comprising a first side away from the anode, the first side comprising a first step portion and a second eaves portion; the projection of the second eaves portion on the array substrate falls within the projection of the first step portion on the array substrate; an organic light-emitting layer arranged on the upper layer of the pixel definition layer, a first portion of the film layer close to the pixel definition layer in the organic light-emitting layer being disconnected between the first step portion and the second eaves portion, and a second portion of the film layer away from the pixel definition layer in the organic light-emitting layer forming a continuous structure between the plurality of organic light-emitting display units; a cathode layer arranged on the upper layer of the organic light-emitting layer, the cathode layer forming a continuous structure between the plurality of organic light-emitting display units. The present invention also provides a near-eye display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an organic light emitting display device and a near-eye display device. Background Art

[0002] Existing micro organic light-emitting display devices, such as silicon-based micro organic light-emitting display devices, use single-crystal silicon chips as substrates, have a pixel size of 1 / 10 of that of traditional display devices, and are much more refined than traditional devices.

[0003] Micro silicon-based OLED display devices, due to their extremely small pixel size, will cause crosstalk problems between adjacent pixel units. Figure 1 As shown, it is a schematic diagram of a micro silicon-based OLED display device in the prior art, including a substrate 10, and the substrate 10 includes a plurality of pixel units. Two pixel units U1 and U2 are shown in the figure, and each pixel unit includes an anode 11 arranged on the substrate 10, and a pixel definition layer 12 arranged on the upper layer of the anode 11 and located between the pixel units U1 and U2. The pixel definition layer 12 forms a gently sloped shape due to the etching process. A hole injection layer 13, a hole transport layer 14, and an electron blocking layer 15 are formed on the pixel definition layer 12. The hole injection layer 13, the hole transport layer 14, and the electron blocking layer 15 are all connected structures between the pixel unit regions. An organic light-emitting layer 19 is arranged in each pixel unit region, a hole blocking layer 16 is arranged on the organic light-emitting layer 19, an electron transport layer 17 is arranged on the hole blocking layer 16, and a cathode 18 is arranged on the electron transport layer 17. The cathode 18 is a connected structure between the pixel unit regions. Figure 1 Under the micro silicon-based OLED display device structure, display crosstalk between pixel units U1 and U2 will occur, that is, when pixel unit U1 has a display signal, part of the display current is transmitted to pixel unit U2, so that pixel unit U2 cannot display the predetermined pixel grayscale, which greatly affects the display effect of the micro silicon-based organic light-emitting display device. Therefore, it is urgent to find out the cause of the crosstalk between pixel units and solve it. Summary of the invention

[0004] The present invention provides an organic light-emitting display device, comprising an array substrate, a plurality of organic light-emitting display units arranged on the array substrate, the organic light-emitting display units comprising an anode, and a pixel definition layer arranged around the anode; the pixel definition layer comprising a first side away from the anode, the first side comprising a first step portion and a second eaves portion; the projection of the second eaves portion on the array substrate falls within the projection of the first step portion on the array substrate; an organic light-emitting layer arranged on the upper layer of the pixel definition layer, a first portion of the film layer of the organic light-emitting layer close to the pixel definition layer is disconnected between the first step portion and the second eaves portion, and a second portion of the film layer of the organic light-emitting layer away from the pixel definition layer forms a continuous structure between the plurality of organic light-emitting display units; a cathode layer arranged on the upper layer of the organic light-emitting layer, the cathode layer forms a continuous structure between the plurality of organic light-emitting display units.

[0005] Optionally, the first step portion has a first top surface and a first bottom surface, the first bottom surface extends in a direction away from one side of the anode, and a first inclined surface is provided between the first top surface and the first bottom surface.

[0006] Optionally, the height difference between the first bottom surface and the first top surface is 20 to 50 nm; the angle between the first inclined surface and the bottom surface is 30° to 60°; the width of the first top surface is 60nm to 160nm, and the width of the first bottom surface is greater than or equal to 200nm.

[0007] Optionally, the second eaves portion has a second bottom surface, the second bottom surface extends in a direction close to the anode side, and the second eaves portion also includes a second inclined surface between the top surface of the pixel definition layer and the second bottom surface; the second eaves portion also includes a side wall arranged below the second bottom surface.

[0008] Optionally, the height difference between the second bottom surface and the top surface of the pixel definition layer is 30nm to 60nm; the angle between the second inclined surface and the second bottom surface is 30° to 60°; and the height of the side wall is 20 to 50nm.

[0009] Optionally, the first step portion has a first top surface and a first bottom surface, the first bottom surface extends in a direction away from the anode side, a first inclined surface is provided between the first top surface and the first bottom surface, and a first point is formed at the intersection of the first top surface and the first inclined surface; the second eaves portion has a second bottom surface, the second bottom surface extends in a direction close to the anode side, a second inclined surface is provided between the top surface of the pixel definition layer and the second bottom surface, and a second point is formed at the intersection of the second bottom surface and the second inclined surface; the distance between the projections of the first point and the second point on the array substrate is 20 to 60 nm.

[0010] Optionally, the first side surfaces of the pixel definition layers of adjacent organic light emitting display units are arranged opposite to each other, and the first bottom surfaces of adjacent first step portions are connected to each other.

[0011] Optionally, the pixel definition layer further includes a second side surface close to the anode, wherein the second side surface covers an edge of the anode and forms a third inclined surface.

[0012] Optionally, the organic light-emitting layer includes a first light-emitting unit and a second light-emitting unit stacked together, wherein the first light-emitting unit is close to the anode side, and further includes a charge generation layer arranged between the first light-emitting unit and the second light-emitting unit; the first partial film layer includes at least the first light-emitting unit and the charge generation layer.

[0013] Optionally, the first light-emitting unit includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer which are sequentially arranged on the anode; the second light-emitting unit includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer which are sequentially arranged on the charge generation layer.

[0014] Optionally, the cathode layer is a double-layer structure, including a metal silver layer or a silver alloy layer arranged close to the anode side, and also including an indium tin oxide layer or an indium zinc oxide layer away from the anode side; or, the cathode layer is a single-layer structure, which is a metal silver layer or a silver alloy layer.

[0015] Optionally, the organic light emitting display device is a silicon-based micro organic light emitting display device.

[0016] The present invention also provides a near-eye display device, comprising the silicon-based micro-organic light-emitting display device as described above, wherein the near-eye display device is a virtual reality display device or an augmented reality display device.

[0017] The organic light-emitting display device and near-eye display device provided by the embodiments of the present invention disconnect the film layer with high carrier mobility in the organic film layer by arranging a first step portion and a second eaves portion on the first side of the pixel definition layer away from the anode, and also ensure that the organic film layers connected together have better lateral conductivity and have excellent display effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of a silicon-based micro-organic light-emitting display device in the prior art;

[0020] Figure 2 A schematic diagram of an organic light emitting display device provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the pixel definition layer in the middle;

[0022] Figure 4 is a schematic diagram of an organic light emitting display device in the prior art;

[0023] Figure 5 is a schematic diagram of the evaporation process;

[0024] Figure 6 A schematic diagram of another organic light emitting display device provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of a near-eye display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the panel or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of an organic light emitting display device provided by an embodiment of the present invention, Figure 3 for Figure 2 An enlarged schematic diagram of the pixel definition layer is shown in the figure. As shown in the figure, the organic light-emitting display device includes an array substrate 10, a plurality of organic light-emitting display units arranged on the array substrate 10, each organic light-emitting display unit includes an anode 11, and a pixel definition layer 12 is arranged around the anode 11.

[0030] The pixel definition layer 12 includes a first side surface 121 away from the anode 11 , the first side surface 121 includes a first step portion 121a and a second eaves portion 121b , and the projection of the second eaves portion 121b on the array substrate 10 falls within the projection of the first step portion 121a on the array substrate 10 .

[0031] The organic light-emitting display device further includes an organic light-emitting layer 13 disposed on the upper layer of the pixel definition layer 12, a first portion of the film layer 131 close to the pixel definition layer 12 in the organic light-emitting layer 13 is disconnected between the first step portion 121a and the second eaves portion 121b, and a second portion of the film layer 132 away from the pixel definition layer 12 in the organic light-emitting layer 13 forms a continuous structure between the plurality of organic light-emitting display units. The organic light-emitting display device further includes a cathode layer 14 disposed on the upper layer of the organic light-emitting layer 13, and the cathode layer 14 forms a continuous structure between the plurality of organic light-emitting display units.

[0032] The first side surface 121 of the pixel definition layer 12 is configured as the above structure, so that the first partial film layer 131 formed on the pixel definition layer 12 is disconnected between the first step portion 121a and the second eaves portion 121b, and the second partial film layer 132 formed on the first partial film layer 131 forms a continuous structure between multiple organic light-emitting display units. The organic light-emitting layer 13 includes a film layer with high carrier mobility. If the film layer with high carrier mobility forms a continuous structure between multiple organic light-emitting display units, leakage between pixel units is likely to occur, thereby causing display crosstalk of the pixel units. In the present invention, the first step portion 121a and the second eaves portion 121b are provided to disconnect the first partial film layer 131 including the film layer with high carrier mobility between the first step portion 121a and the second eaves portion 121b, thereby avoiding display crosstalk of the pixel unit caused by the film layer with high carrier mobility; and the provision of the first step portion 121a and the second eaves portion 121b can also ensure that the second partial film layer 132 in the organic light-emitting layer 13 away from the pixel definition layer 12 forms a continuous structure between multiple organic light-emitting display units, ensuring that the cathode layer 14 formed on the second partial film layer 132 can also form a continuous structure between multiple organic light-emitting display units, ensuring the transmission of the cathode signal.

[0033] Specifically, the first step portion 121a has a first top surface 21 and a first bottom surface 22, and the first bottom surface 22 extends in a direction away from the anode 11. A first inclined surface 23 is provided between the first top surface 21 and the first bottom surface 22. The second eaves portion 121b has a second bottom surface 32, and the second bottom surface 32 extends in a direction close to the anode 11. A second inclined surface 33 is provided between the top surface 31 of the pixel definition layer 12 and the second bottom surface 32 of the second eaves portion 121b, and the second eaves portion 121b further includes a side wall 34 disposed below the second bottom surface 32.

[0034] Each film layer in the organic light-emitting layer 13 is sequentially formed on the pixel definition layer 12 of the above structure. Because there is a height step difference of the side wall 34 between the first top surface 21 of the first step portion 121a and the second bottom surface 32 of the second eaves portion 121b, the organic light-emitting film layer formed on the pixel definition layer 12 will be disconnected at the step difference, with a portion formed on the top surface 31 of the pixel definition layer 12 and the second inclined surface 33 of the second eaves portion 121b, and a portion formed on the first top surface 21, the second inclined surface 23 and the second bottom surface 22 of the first step portion 121a. As subsequent film layers are formed, the first partial film layer 131 in the organic light-emitting layer 13 is completed. Each film layer in the first partial film layer 131 has a disconnected structure between the first step portion 121a and the second eaves portion 121b. The first partial film layer 131 includes an organic film layer with high carrier mobility. The organic film layer with high carrier mobility is disconnected between the first step portion 121a and the second eaves portion 121b, which will not cause display crosstalk between pixel units.

[0035] Then, each film layer in the second part of the film layer 132 in the organic light-emitting layer 13 is formed successively, and each film layer in the second part of the film layer 132 forms a continuous structure between multiple organic light-emitting display units. As the thickness of the film layers formed in the organic light-emitting layer 13 accumulates, when the thickness of the film layers exceeds the height of the side wall 34, the film layers will be connected together. The structure of the pixel definition layer 12 provided by the present invention can further ensure that the connected film layers have better lateral conductivity.

[0036] Please refer to Figure 4 , Figure 4 The schematic diagram of an organic light-emitting display device in the prior art is shown in the figure. As shown in the figure, the organic light-emitting display device includes a step structure 90 of a pixel definition layer. The step structure 90 is eaves-shaped and has a top surface 91, a bottom surface 92, an inclined surface 93 and a side wall 94. Below the step structure 90 is a plane structure 95, which can be a plane of an anode or a plane of a pixel definition layer. An organic film layer 96 is formed on the upper layer of the above structure, that is, the organic film layer 96 is formed on the above structure having only one step.

[0037] Please refer to Figure 5 , Figure 5The schematic diagram of the evaporation process is shown in FIG. 1 . The organic film layer is generally formed by using a point source evaporation crucible, and the organic material is diffused and deposited on the film-forming surface. As shown in the figure, it includes a deposition chamber 101, in which a substrate holding device 102 is arranged, and the substrate holding device 102 fixes and holds a substrate 103; a point source evaporation crucible 105 is arranged in the deposition chamber 101, and the point source evaporation crucible 105 includes a containing device 1051 and a nozzle 1052 arranged on the containing device 1051. During the evaporation deposition process, the substrate holding device 102 drives the substrate 103 to rotate around its central axis, and the organic film layer material sprayed from the point source evaporation crucible 105 is diffused and deposited on the substrate 103 to form a film. The characteristic of the evaporation film of organic materials can be said to be that the organic film layer material sublimated by the evaporation deposition equipment is not diffused to the substrate 103 from the vertical direction to the substrate 103, but diffused and deposited on the substrate 103 from the side.

[0038] like Figure 4 As shown, due to the obstruction of the eaves-shaped step structure 90, the film layers 961, 962, and 963 that are first formed in the organic film layer 96 are disconnected at the step structure 90 and are divided into the first part 961-1, 962-1, 963-1 and the second part 961-2, 962-2, and 963-2. Due to the characteristics of the organic material vapor deposition film and the obstruction of the step structure 90, when the first part 961-1 of the film layer 961 is formed on the plane structure 95, the film thickness of the first part 961-1 is less than the film thickness of other parts near the eaves-shaped step structure 90, and because of the accumulation of the film thickness, there is less vapor deposition material that can be diffused and deposited near the eaves-shaped step structure 90, that is, the other parts aggravate the obstruction of the part near the eaves-shaped step structure 90, and the difference between the thickness of this part and the thickness of other parts is increased. At the same time, due to the characteristics of organic material vapor deposition film formation and the shielding of the slope 93 by the top surface 91 of the step structure 90, the vapor deposited organic material forms less film on the slope 93, and the thickness of the second part 961-2 of the film layer 961 at the edge near the slope 93 is thinner than the thickness of other parts. As the thickness of the film layer accumulates, the other parts intensify the shielding of the film layer at the edge near the slope 93, and the difference between the thickness there and the thickness of other parts increases.

[0039] Similarly, when the film layer 962 is formed, the first part 962-1 has a film thickness of less than other parts near the eaves-shaped step structure 90 due to the characteristics of the film formed by the evaporation of organic materials, the shielding of the eaves-shaped step structure 90, the shielding of the thicker part of the film layer 961-1, and the shielding effect of the first part 962-1 itself. The second part 962-2 has a thickness of less than other parts near the edge of the slope 93 due to the characteristics of the film formed by the evaporation of organic materials, the shielding of the top surface 91 to the slope 93, the shielding of the thicker part of the film layer 961-2, and the shielding effect of the film layer 962-2 itself. The situation of the film layer 963 is the same.

[0040] The same is true for the film layer 964. The first part 964-1 and the second part 964-2 of the film layer 964 are connected at the edge of the film layer. However, since the film layer thickness is very thin at the edge, although the first part 964-1 and the second part 964-2 of the film layer 964 are connected together, the connected part is very small and is only connected at point A. For the same reason, the film layer 965 formed laterally in the film layer 964 has the first part 965-1 and the second part 965-2 of the film layer 965 connected together, but the connected part is very small and is only connected at point B. Since the film thickness at points A and B is very small, the resistance is very small, and it is easy for conduction between the film layers to occur. For example, the electrical signal of the first part 965-1 of the film layer 965 is not transmitted horizontally to the second part 965-2, but is directly transmitted from point A to point B, and conduction between the film layers occurs, causing poor display.

[0041] The structure of the pixel definition layer 12 provided by the present invention can avoid the above disadvantages and ensure that the film layers connected together have better lateral conductivity. Figure 2 and Figure 3, the first step portion 121a has a first top surface 21 and a first bottom surface 22, the first bottom surface 22 extends in a direction away from the anode 11, and has a first inclined surface 23 between the first top surface 21 and the first bottom surface 22. Due to the existence of the first bottom surface 22 and the first inclined surface 23, when the organic film layer 13 is formed on the above structure, although the shielding effect of the second eaves portion 121b makes the film thickness at the first top surface 21 near the second eaves portion 121b smaller than other parts, because other thicker parts are formed on the first bottom surface 22 and the first inclined surface 23, their height is lower than the height of the film layer near the second eaves portion 121b, and the film layer near the second eaves portion 121b is not blocked, thereby reducing the thickness difference of the film layer. Similarly, the thicker part of the film layer formed previously will not block the film layer near the second eaves portion 121b in the subsequent film layer, further reducing the thickness difference of the film layer. When the film layers in the second part of the film layer 132 in the organic film layer 13 are connected together, the connection area is large, and conduction between the film layers is not likely to occur.

[0042] In the prior art, such as Figure 4 As shown, the angle between the inclined surface 93 and the plane 95 is relatively large. Compared with the prior art, in the present invention, further, since the second eaves portion 121b has the second inclined surface 33 and the first step portion 121a has the first inclined surface 23, the angle between the first inclined surface 23 and the second inclined surface 33 is relatively small, which is beneficial to increase the contact area of ​​the film layer. Preferably, the first inclined surface 23 and the second inclined surface 33 have the same inclination angle, that is, the first inclined surface 23 and the second inclined surface 33 are parallel, and the contact area of ​​the same film layer is increased, which ensures that the film layers connected together have better lateral conductivity.

[0043] Optionally, the height difference h1 between the first bottom surface 22 and the first top surface 21 of the first step portion 121a is 20 to 50 nm. The angle between the first inclined surface 23 and the first bottom surface 22 is 30° to 60°. The width of the first top surface 21 is 60 nm to 160 nm, and the first bottom surface width d2 is greater than or equal to 200 nm.

[0044] Optionally, the height difference h3 between the second bottom surface 32 of the second eaves portion 121b and the top surface 31 of the pixel definition layer is 30nm to 60nm. The angle between the second inclined surface 33 and the second bottom surface 32 is 30° to 60°. The height h2 of the side wall 34 is 20 to 50nm.

[0045] Optionally, the first top surface 21 of the first step portion 121a and the first inclined surface 23 intersect to form a first point C. The second inclined surface 33 and the second bottom surface 32 of the second eaves portion 121b intersect to form a second point D. The distance d1 between the projections of the first point C and the second point D on the array substrate 10 is 20 to 60 nm.

[0046] Optionally, the first side surfaces 121 of the pixel definition layers of adjacent organic light emitting display units are arranged opposite to each other, and the first bottom surfaces 22 of adjacent first step portions 121 a are connected to each other.

[0047] Optionally, the pixel definition layer 12 further includes a second side surface 122 close to the anode 11 , and the second side surface 122 covers an edge of the anode 121 and forms a third inclined surface.

[0048] Optionally, the cathode layer 14 is a double-layer structure, including a metal silver layer or a silver alloy layer disposed near the anode 11, and an indium tin oxide layer or an indium zinc oxide layer disposed away from the anode 11. Optionally, the cathode layer can also be a single-layer structure, a single-layer metal silver layer, or a single-layer silver alloy layer. Figure 4 In the prior art, since the organic film layer is very thin at the connection position, the cathode layer formed on the organic film layer will also form the same morphology, but if the connection point of the cathode layer is very small, the cathode layer resistance will be very large, or leakage between the film layers will occur. In order to ensure good conductivity of the cathode layer, a double-layer cathode layer is generally used in the prior art. The first layer is a metal silver layer or a silver alloy layer on the anode side, and the second layer is an indium tin oxide layer or an indium zinc oxide layer away from the anode side. The second layer of the cathode layer electrically connects the first layer to each other to improve the conductivity of the cathode layer. In this application, please refer to Figure 2 and Figure 3 Because the first side of the pixel definition layer 12 has a first step portion 121a and a second eaves portion 121b, the connection surface of the organic film layer 13 becomes larger, and the connection surface of the cathode layer 14 formed on the organic film layer 13 also becomes larger, thereby ensuring the conductive performance of the cathode layer 14. Therefore, in the present application, optionally, the cathode layer 14 can be a single-layer structure, a single-layer metal silver layer, or a single-layer silver alloy layer, and there is no need to set an indium tin oxide layer or an indium zinc oxide layer located above the layer, which simplifies the process steps and can also improve the transmittance of the organic light-emitting display device. Optionally, in the present application, the cathode layer 14 can also be a double-layer structure, including a metal silver layer or a silver alloy layer disposed on the side close to the anode 11, and also including an indium tin oxide layer or an indium zinc oxide layer away from the anode 11. An indium tin oxide layer or an indium zinc oxide layer is disposed on the metal silver layer or the silver alloy layer to further ensure the conductive performance of the cathode layer.

[0049] Optionally, the organic light-emitting display device is a silicon-based micro organic light-emitting display device. Silicon-based micro organic light-emitting display devices use single-crystal silicon chips as substrates, and the pixel unit size is 1 / 10 of that of traditional display devices. The fineness is much higher than that of traditional devices. Silicon-based micro organic light-emitting display devices have a broad market application space and are particularly suitable for helmet displays, stereoscopic display mirrors, and glasses-type displays. If connected with mobile communication networks, satellite positioning and other systems, accurate image information can be obtained anywhere and at any time, which has very important military value in military applications such as national defense, aviation, aerospace, and even single-soldier combat. Silicon-based micro organic light-emitting display devices can provide high-quality video displays for mobile information products such as portable computers, wireless Internet browsers, portable DVDs, game platforms, and wearable computers. It can be said that silicon-based micro organic light-emitting display devices provide an excellent solution for near-eye applications (such as helmet displays) for both civilian consumer fields and industrial applications and even military uses.

[0050] The organic light-emitting display device provided by the embodiment of the present invention disconnects the film layer with high carrier mobility in the organic film layer by arranging a first step portion and a second eaves portion on the first side of the pixel definition layer away from the anode, and ensures that the film layers connected together have better lateral conductivity.

[0051] Please refer to Figure 6 , Figure 6 A schematic diagram of another organic light-emitting display device provided in an embodiment of the present invention. The organic light-emitting display device includes an array substrate 40, a plurality of organic light-emitting display units disposed on the array substrate 40, each organic light-emitting display unit includes an anode 41, and a pixel definition layer 42 is disposed around the anode 41. The pixel definition layer 42 includes a first side surface 421 away from the anode 41, the first side surface 421 includes a first step portion 421a and a second eaves portion 421b, and the projection of the second eaves portion 421b on the array substrate 40 falls within the projection of the first step portion 421a on the array substrate 40.

[0052] The organic light-emitting display device also includes an organic light-emitting layer 43 disposed on the upper layer of the pixel definition layer 42, and the organic light-emitting layer includes a first light-emitting unit 431 and a second light-emitting unit 432 stacked, the first light-emitting unit 431 is close to the side of the anode 41, and also includes a charge generation layer 433 disposed between the first light-emitting unit 431 and the second light-emitting unit 432. At least the first light-emitting unit 431 and the charge generation layer 433 are disconnected between the first step portion 421a and the second eaves portion 421b of the second side surface 421 of the pixel definition layer 42. At least the film layer of the second light-emitting unit 432 away from the pixel definition layer 12 forms a continuous structure between multiple organic light-emitting display units. The organic light-emitting display device also includes a cathode layer 44 disposed on the upper layer of the organic light-emitting layer 43, and the cathode layer 44 forms a continuous structure between multiple organic light-emitting display units.

[0053] Please refer to Figure 3 , another structure of a pixel definition layer of an organic light emitting display device provided by an embodiment of the present invention and Figure 3 The structure shown is consistent, the first step portion 121a has a first top surface 21 and a first bottom surface 22, and the first bottom surface 22 extends in a direction away from the anode 11. A first inclined surface 23 is provided between the first top surface 21 and the first bottom surface 22. The second eaves portion 121b has a second bottom surface 32, and the second bottom surface 32 extends toward the side close to the anode 11. A second inclined surface 33 is provided between the top surface 31 and the second bottom surface 32 of the pixel definition layer, and the second eaves portion 121b also includes a side wall 34 disposed below the second bottom surface 32.

[0054] The thickness of the first light-emitting unit 431 and the charge generation layer 433 in the organic light-emitting layer 43 is set to be less than the height h2 of the side wall 34 of the second eaves portion 121b, and the first light-emitting unit 431 and the charge generation layer 433 will be disconnected at the first step portion 121a and the second eaves portion 121b during film formation. The charge generation layer 433 has a high carrier mobility, and the charge generation layer 433 is disconnected at the first step portion 121a and the second eaves portion 121b, so that display crosstalk between pixel units will not be caused.

[0055] The thickness of the first light-emitting unit 431, the charge generation layer 433 and the second light-emitting unit 432 is set to be greater than the height h2 of the side wall 34 of the second eaves portion 121b, and at least the film layer on the side of the second light-emitting unit 432 away from the pixel definition layer 12 forms a continuous structure between multiple organic light-emitting display units.

[0056] At the same time, due to the morphology of the first bottom surface 22 and the first inclined surface 23 of the first step portion 121a, when the organic film layer 43 is formed on the above structure, although the shielding effect of the second eaves portion 121b makes the film thickness of the first top surface 21 near the second eaves portion 121b less than other parts, because other thicker parts are formed on the first bottom surface 22 and the first inclined surface 23, their height is lower than the height of the film layer near the second eaves portion 121b, and the film layer near the second eaves portion 121b is not blocked, which reduces the thickness difference of the film layer. In addition, the thicker part of the film layer formed previously will not block the film layer near the second eaves portion 121b in the subsequent film layer, which further reduces the thickness difference of the film layer. When the film layer on the side away from the pixel definition layer 12 in at least the second light-emitting unit 432 in the organic film layer 43 is connected together, the connection area is large, and conduction between the film layers is not easy to occur. Furthermore, since the first inclined surface 23 and the second inclined surface 33 have a small angle difference, it is beneficial to increase the contact area of ​​the film layer. Preferably, the first inclined surface 23 and the second inclined surface 33 have the same inclination angle, that is, the first inclined surface 23 and the second inclined surface 33 are parallel, which further increases the contact area of ​​the same film layer and ensures that the connected film layers have better lateral conductivity.

[0057] A cathode layer 44 is formed on the second light-emitting unit 432 of which at least a part of the film layer is a continuous structure. The cathode layer 44 forms a continuous structure between a plurality of organic light-emitting display units, thereby ensuring normal transmission of cathode signals between various pixel units.

[0058] Optionally, the first light-emitting unit 431 includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer sequentially disposed on the anode 42. The second light-emitting unit 422 includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer sequentially disposed on the charge generation layer 433.

[0059] Optionally, the first side surfaces 121 of the pixel definition layers of adjacent organic light emitting display units are arranged opposite to each other, and the first bottom surfaces 22 of adjacent first step portions 121 a are connected to each other.

[0060] Optionally, the pixel definition layer 121 further includes a second side surface 122 close to the anode 11 , and the second side surface 122 covers an edge of the anode 121 and forms a third inclined surface.

[0061] Optionally, the organic light emitting display device is a silicon-based micro organic light emitting display device.

[0062] The organic light-emitting display device provided by an embodiment of the present invention disconnects the film layer with high carrier mobility in the organic film layer by arranging a first step portion and a second eave portion on the first side of the pixel definition layer away from the anode, and also ensures that the film layers connected together have better lateral conductivity.

[0063] Please refer to Figure 7 , Figure 7 Schematic diagram of a near-eye display device provided in an embodiment of the present invention. The near-eye display device 1 includes a frame 2 and a silicon-based micro-organic light-emitting display device 3 disposed in the frame 2. The silicon-based micro-organic light-emitting display device 3 is the silicon-based micro-organic light-emitting display device described above. The near-eye display device 1 can be a virtual reality display device, or an augmented reality display device.

[0064] 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: It comprises an array substrate, and a plurality of organic light emitting display units arranged on the array substrate, wherein the organic light emitting display units comprise an anode, and a pixel definition layer is arranged around the anode; The pixel definition layer includes a first side surface away from the anode, the first side surface includes a first step portion and a second eave portion; the projection of the second eave portion on the array substrate falls within the projection of the first step portion on the array substrate; An organic light-emitting layer is disposed on the pixel definition layer, wherein a first portion of the film layer of the organic light-emitting layer close to the pixel definition layer is disconnected between the first step portion and the second eaves portion, and a second portion of the film layer of the organic light-emitting layer away from the pixel definition layer forms a continuous structure between the plurality of organic light-emitting display units; A cathode layer disposed on the upper layer of the organic light-emitting layer, wherein the cathode layer forms a continuous structure between the plurality of organic light-emitting display units; The second eaves portion has a second bottom surface, the second bottom surface extends in a direction close to the anode side, and the second eaves portion also includes a second inclined surface between the top surface of the pixel definition layer and the second bottom surface; the second eaves portion also includes a side wall arranged below the second bottom surface.

2. The organic light emitting display device according to claim 1, wherein: The first step portion has a first top surface and a first bottom surface, the first bottom surface extends in a direction away from one side of the anode, and a first inclined surface is defined between the first top surface and the first bottom surface.

3. The organic light emitting display device according to claim 2, wherein: The height difference between the first bottom surface and the first top surface is 20 to 50 nm; the angle between the first inclined surface and the first bottom surface is 30° to 60°; the width of the first top surface is 60 nm to 160 nm, and the width of the first bottom surface is greater than or equal to 200 nm.

4. The organic light emitting display device according to claim 1, wherein: The height difference between the second bottom surface and the top surface of the pixel definition layer is 30nm to 60nm; the angle between the second inclined surface and the second bottom surface is 30° to 60°; and the height of the side wall is 20 to 50nm.

5. The organic light emitting display device according to claim 1, wherein: The first step portion has a first top surface and a first bottom surface, the first bottom surface extends in a direction away from one side of the anode, a first inclined surface is provided between the first top surface and the first bottom surface, and a first point is formed at the intersection of the first top surface and the first inclined surface; The second eaves portion has a second bottom surface, the second bottom surface extends in a direction close to the anode side, a second inclined surface is provided between the top surface of the pixel definition layer and the second bottom surface, and a second point is formed at the intersection of the second bottom surface and the second inclined surface; The distance between the projections of the first point and the second point on the array substrate is 20 to 60 nm.

6. The organic light emitting display device according to claim 1, wherein: The first side surfaces of the pixel definition layers of adjacent organic light emitting display units are arranged opposite to each other, and the first bottom surfaces of adjacent first step portions are connected to each other.

7. The organic light emitting display device according to claim 1, wherein: The pixel definition layer further includes a second side surface close to the anode, wherein the second side surface covers an edge of the anode and forms a third inclined surface.

8. The organic light emitting display device according to claim 1, wherein: The organic light-emitting layer includes a first light-emitting unit and a second light-emitting unit stacked together, wherein the first light-emitting unit is close to the anode side, and also includes a charge generation layer arranged between the first light-emitting unit and the second light-emitting unit; the first partial film layer includes at least the first light-emitting unit and the charge generation layer.

9. The organic light emitting display device according to claim 8, wherein: The first light-emitting unit includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer which are sequentially arranged on the anode; the second light-emitting unit includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first light-emitting material layer which are sequentially arranged on the charge generation layer.

10. The organic light emitting display device according to claim 1, wherein: The cathode layer is a double-layer structure, including a metal silver layer or a silver alloy layer arranged close to the anode side, and also including an indium tin oxide layer or an indium zinc oxide layer away from the anode side; or, the cathode layer is a single-layer structure, which is a metal silver layer or a silver alloy layer.

11. The organic light emitting display device according to any one of claims 1 to 10, characterized in that: The organic light emitting display device is a silicon-based micro organic light emitting display device.

12. A near-eye display device, characterized in that: It includes the silicon-based micro organic light-emitting display device as described in claim 11, wherein the near-eye display device is a virtual reality display device or an augmented reality display device.

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