WO2020258418A1

WO2020258418A1 - Organic light emitting display apparatus

Info

Publication number: WO2020258418A1
Application number: PCT/CN2019/096790
Authority: WO
Inventors: 曾章和
Original assignee: 上海视涯信息科技有限公司
Priority date: 2019-06-26
Filing date: 2019-07-19
Publication date: 2020-12-30
Also published as: CN110299389B; CN110299389A

Abstract

The present invention provides an organic light emitting display apparatus, comprising multiple organic light emitting units. Each organic light emitting unit comprises a lower electrode provided on a substrate, an organic light emitting layer provided on the lower electrode, and an upper electrode provided on the organic light emitting layer. The lower electrode comprises a lower electrode first portion and a lower electrode second portion arranged in a stacked manner. The lower electrode first portion is provided on the substrate. An included angle between a side edge of the lower electrode first portion and the substrate is greater than or equal to 90 degrees. The lower electrode second portion is provided on the lower electrode first portion. An included angle between a side edge of the lower electrode second portion and a top surface of the lower electrode first portion is less than 90 degrees. The apparatus further comprises a pixel definition layer provided between the multiple organic light emitting units and covering a side edge of the lower electrode. The pixel definition layer is formed into a film according to the shape of the side edge of the lower electrode. The organic light emitting layers of the multiple organic light emitting units comprise multiple organic film layers. At least part of the organic film layers are disconnected at the pixel definition layer.

Description

Organic light emitting display device

Technical field

The embodiment of the present invention relates to the field of display technology, and in particular to an organic light emitting display device.

Background technique

Organic light-emitting display devices have the problem of crosstalk between adjacent pixel units. As shown in FIG. 1, it is a schematic diagram of an organic light emitting display device in the prior art, which includes a substrate 10 on which a plurality of pixel units are arranged. The figure shows two pixel units U1 and U2. Each pixel unit includes an anode 11 arranged on the substrate 10, and a pixel defining layer 12 arranged on the upper layer of the anode 11 and located between the pixel units U1 and U2. The pixel defining layer 12 has a gentle slope shape due to the etching process . The hole injection layer 13, the hole transport layer 14, and the electron blocking layer 15 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 located between the pixel unit regions It is a connected connection structure. The organic light-emitting layer 19 disposed in the area of each pixel unit, the hole blocking layer 16 disposed on the organic light-emitting layer 19, the electron transport layer 17 disposed on the hole blocking layer 16, the cathode disposed on the electron transport layer 17 18. The cathode 18 is a connected connection structure between the pixel unit regions. Under the structure of the organic light emitting display device described in FIG. 1, display crosstalk between the pixel units U1 and U2 will occur, that is, when the pixel unit U1 has a display signal, the carrier mobility is high due to the continuous structure of the film layer. Part of the display current is transferred to the pixel unit U2, so that the pixel unit U2 cannot display the predetermined pixel gray scale, which greatly affects the display effect of the organic light emitting display device.

In the prior art, the pixel definition layer is designed to have a multilayer structure or the anode is set to have a chamfered structure, and the film layer with high carrier mobility is disconnected to suppress the above-mentioned crosstalk failure. It is a patent of CN103781215, please refer to FIG. 2, which is a schematic diagram of an organic light emitting display device provided by the publication number CN103781215. As shown in the figure, the pixel definition layer includes a first portion 150 and a second portion 155 disposed on the first portion 150, and a gap 156 is disposed between the first portion 150 and the second portion 155. The organic light emitting layer 120 is arranged to be disconnected at the gap 156 to block crosstalk between pixel units. FIG. 3 is a schematic diagram of an organic light-emitting display device provided by the publication number CN103891408. As shown in the figure, the anode 31 has a chamfer 31A, and the organic light-emitting layer 32A can be disconnected at the anode chamfer 31A to block crosstalk between pixel units.

However, the above structures have obvious disadvantages. The first is to complicate the manufacturing process. The function of the pixel definition layer is to separate the pixel units, which are generally formed with a single-layer structure. The pixel definition layer in the structure shown in Figure 2 requires two or more layers. Each layer structure needs to be formed separately, which increases the process steps. . The second is that light leakage may occur. As shown in FIG. 3, the organic light-emitting layer 32A may not always be disconnected at the anode chamfer 31A, and it is very likely that a very thin continuous film layer is formed. Because the sheet resistance of the organic film layer 32A at the chamfer 31A will be small, a small resistance current path will be formed between the anode 31 and the cathode 33 in the area A in FIG. 3, so that the current is no longer lateral. The transmission is in the area A, from the anode 31 and the organic light-emitting layer 32A to the cathode 122, and light leakage occurs in the area shown in A in the figure.

Summary of the invention

In view of this, the present invention provides an organic light emitting display device, the organic light emitting display device includes a plurality of organic light emitting units; each of the organic light emitting units includes a lower electrode arranged on a substrate, and is arranged on the lower electrode The organic light-emitting layer, the upper electrode provided on the organic light-emitting layer;

The lower electrode includes a first portion of a lower electrode and a second portion of the lower electrode that are stacked; the first portion of the lower electrode is disposed on the substrate, and the side of the first portion of the lower electrode is The included angle is greater than or equal to 90 degrees; the second part of the bottom electrode is disposed on the first part of the bottom electrode, and the included angle between the side of the second part of the bottom electrode and the top surface of the first part of the bottom electrode Less than 90 degrees;

It also includes a pixel definition layer disposed between the plurality of organic light emitting units and covering the side of the lower electrode, and the pixel definition layer includes a first part of the pixel definition layer covering the side of the first part of the lower electrode The second part of the pixel definition layer covering the side of the second part of the lower electrode; the angle between the first part of the pixel definition layer and the substrate is greater than or equal to 90 degrees; the second part of the pixel definition layer and the The included angle of the top surface of the first part of the lower electrode is less than 90 degrees;

The organic light-emitting layer of the plurality of organic light-emitting units includes multiple organic film layers, and at least part of the organic film layers are disconnected at the pixel defining layer.

Optionally, the included angle between the side edge of the first part of the bottom electrode and the substrate is greater than 135 degrees and less than or equal to 150 degrees.

Optionally, the included angle between the side of the second portion of the lower electrode and the top surface of the first portion of the lower electrode is greater than or equal to 30 degrees and less than or equal to 60 degrees.

Optionally, the lower electrode further includes a third portion of the lower electrode disposed under the first portion of the lower electrode.

Optionally, the lower electrode further includes a third portion of the lower electrode disposed above the second portion of the lower electrode.

Optionally, the organic light-emitting layer includes a stacked first organic film layer, and a stacked second organic film layer disposed on the first organic film layer; the first organic film layer is on the pixel defining layer处 disconnect.

Optionally, the thickness of the first organic film layer is less than or equal to the thickness of the first portion of the bottom electrode; the sum of the thicknesses of the first organic film layer and the second organic film layer is greater than the first portion of the bottom electrode. The thickness of the section.

Optionally, the upper electrodes of the plurality of organic light emitting units are connected to each other.

Optionally, the first organic film layer includes a hole injection layer and a hole transport layer that are sequentially stacked; the second organic film layer includes an electron blocking layer, an organic light-emitting material layer, and a hole that are stacked sequentially. Barrier layer, electron transport layer.

Optionally, the first organic film layer includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, a first organic light-emitting material layer, a first hole blocking layer, A charge generation layer, a second hole injection layer, a second hole transport layer; the second organic film layer includes a second electron blocking layer, a second organic light-emitting material layer, and a second hole blocking layer that are sequentially stacked , Electron transport layer.

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

The organic light-emitting display device provided by the present invention utilizes a two-layer structure or a multi-layer structure of the lower electrode, which is a common structure in organic light-emitting display devices, and does not need to increase the number of lower electrode film layers and corresponding components on the basis of the prior art. Film process, and the use of a two-layer or multi-layer structure of the bottom electrode, only needs to form a pixel definition layer according to the shape of the bottom electrode, which can cut off some organic film layers and prevent crosstalk between pixel units. For the pixel definition layer formed by multiple film formation and etching, the process is simplified. In addition, at the pixel definition layer, if part of the organic film layer is not completely disconnected, a very thin continuous film layer is formed. However, because the pixel definition layer separates the organic film layer from the lower electrode, A current path with low resistance will not be formed between the upper electrode, so that light leakage will not occur, and the display effect of the organic light emitting display device is improved.

Description of the drawings

FIG. 1 is a schematic diagram of an organic light emitting display device in the prior art;

2 is a schematic diagram of another organic light emitting display device in the prior art;

3 is a schematic diagram of another organic light emitting display device in the prior art;

4 is a schematic diagram of an organic light emitting display device provided by an embodiment of the present invention;

5 and 6 are schematic diagrams of a method for forming a pixel definition layer;

7 to 10 are schematic diagrams of the structure of the lower electrode in several embodiments.

Detailed ways

The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show part of the structure related to the present invention, but not all of the structure.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. It should be noted that the “up”, “down”, “left”, “right” and other directional words described in the embodiments of the present invention are described from the angle shown in the drawings, and should not be understood as implementing the present invention. Limitations of examples. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" the other element, but also It is indirectly formed "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes, and do not indicate any order, quantity, or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

Please refer to FIG. 4, which is a schematic diagram of an organic light-emitting display device provided by an implementation of the present invention. As shown in the figure, the organic light-emitting display device 20 includes a plurality of organic light-emitting units 21; each organic light-emitting unit 21 includes a substrate 22 The lower electrode 23, the organic light emitting layer 24 provided on the lower electrode, and the upper electrode 25 provided on the organic light emitting layer 24. Optionally, the lower electrode 23 is an anode, and the upper electrode 25 is a cathode.

The lower electrode 23 includes a lower electrode first part 231 and a lower electrode second part 232 that are stacked. The bottom electrode first portion 231 is disposed on the substrate 22, and the angle α1 between the side of the bottom electrode first portion 231 and the substrate 22 is greater than or equal to 90 degrees. The second portion 232 of the lower electrode is disposed on the first portion 231 of the lower electrode, and the angle α2 between the side of the second portion 232 of the lower electrode and the top surface of the first portion 231 of the lower electrode is less than 90 degrees.

The organic light emitting display device 20 further includes a pixel defining layer 26 arranged between the plurality of organic light emitting units 21, and the pixel defining layer 26 is formed into a film according to the shape of the side of the lower electrode 23 and covers the side of the lower electrode 23. Specifically, the pixel definition layer includes a pixel definition layer first part 261 covering the side of the lower electrode first part 231 and a pixel definition layer second part 262 covering the side of the lower electrode second part 232. According to the shape of the side of the bottom electrode 23, the angle α1 between the first part 261 of the pixel definition layer and the substrate 22 is greater than or equal to 90 degrees, and the angle α2 between the second part 262 of the pixel definition layer and the top surface of the first part 231 of the bottom electrode is less than 90 degrees.

As shown in FIG. 5 and FIG. 6, a schematic diagram of a method for forming a pixel definition layer. The pixel defining layer is formed after the bottom electrode 23 is formed. First, the pixel definition layer is deposited and formed on the upper layer of the lower electrode 23. The pixel definition layer is generally formed by a chemical vapor deposition process. The film forming material is introduced into the reaction chamber in a gaseous state, and then a chemical reaction occurs between the materials to deposit The upper layer of the lower electrode 23 can therefore form a pixel definition layer 260 covering the side of the lower electrode 23 and having the same shape as the side of the lower electrode 23. The pixel definition layer 260 is a whole layer structure. The pixel definition layer 260 includes a pixel definition layer first part 261 covering the side of the lower electrode first part 231, and a pixel definition layer first part 262 covering the side of the lower electrode second part 232. The pixel definition layer 260 also includes a portion covering the top surface of the lower electrode 23 and a portion of the substrate 22 covering the space between two adjacent lower electrodes 23.

Then, a photoresist layer is formed on the entire pixel defining layer 260, and the photoresist layer is exposed and developed to form a patterned photoresist layer 27. The patterned photoresist layer 27 exposes the top surface of the lower electrode 23. And cover other positions. The pixel defining layer 260 is etched using the patterned photoresist layer 27 as a mask, the pixel defining layer 260 on the top surface of the lower electrode 23 is removed, and then the patterned photoresist layer 27 is removed. The etched pixel definition layer 260 includes a first part 261 of a pixel definition layer covering the side of the first part 231 of the lower electrode, a second part 262 of a pixel definition layer covering the side of the second part 232 of the lower electrode, and covering two adjacent ones. The third portion 263 of the pixel definition layer in the space between the lower electrodes 23.

Referring to FIG. 4, an organic light emitting layer 24 is formed on the pixel definition layer after the etching is completed. The organic light emitting layer 24 includes multiple organic film layers, wherein at least part of the organic film layers are disconnected at the pixel definition layer.

The same organic film layer of the plurality of organic light-emitting units 21 of the organic light-emitting display device 20 is formed in the same evaporation process using an open mask. The open mask only shields the peripheral area of the display device, which reduces the display area. Both the organic light emitting unit area and the spacer area are exposed. In the evaporation process, the organic film layer material is first heated and vaporized, and the vaporized organic film layer material diffuses on the substrate 22 and adheres. Because the vaporized organic film material has low energy and poor film coverage, when it diffuses to the first part 261 of the pixel definition layer and the second part 262 of the pixel definition layer, the second part 262 of the pixel definition layer blocks the pixel definition layer. In the first part 261, the organic film layer material cannot be continuously attached to the first part 261 of the pixel definition layer and the second part 262 of the pixel definition layer, thereby forming a disconnected structure.

In the embodiment of the present invention, the lower electrode 23 is arranged in the shape described above, so that the pixel defining layer 26 is also formed into a film according to the shape of the side surface of the lower electrode 23, and the organic film layer formed on the pixel defining layer 26 will be on the pixel defining layer. , So as to eliminate crosstalk between adjacent organic light emitting units 21.

Optionally, the included angle α1 between the side of the first part 231 of the bottom electrode and the substrate 22 is greater than 135 degrees and less than or equal to 150 degrees. The angle α2 between the side of the second portion 232 of the lower electrode and the top surface of the first portion 231 of the lower electrode is greater than or equal to 30 degrees and less than or equal to 60 degrees. The pixel definition layer is formed into a film according to the shape of the bottom electrode, and the angle α1 between the first portion 261 of the pixel definition layer and the substrate 22 is also greater than 135 degrees and less than or equal to 150 degrees. The angle α2 between the second portion 262 of the pixel definition layer and the top surface of the first portion 231 of the bottom electrode is also greater than or equal to 30 degrees and less than or equal to 60 degrees. The above-mentioned angle range process is easier to control and has good process stability.

In the present invention, the lower electrode has a two-layer structure, and the two-layer structure or the multi-layer structure of the lower electrode is a common structure in organic light emitting display devices.

Optionally, the bottom electrode first portion 231 is a contact electrode layer that enhances the contact strength between the electrode and the substrate 22. It should be noted that the substrate 22 also includes a substrate on which other film layers have been deposited. The bottom electrode first portion 231 can enhance and The other material layers on the substrate 22 are in contact with strong materials. The material of the first part 231 of the lower electrode is at least one metal selected from the group consisting of silver, neodymium, chromium, indium, tin, zinc, cadmium, titanium, aluminum, magnesium, and molybdenum. The second portion 232 of the lower electrode is a conductive metal layer with strong conductivity.

Optionally, the organic light emitting unit 21 is an organic light emitting unit with a microcavity structure, the lower electrode 23 includes a reflective material, and the upper electrode 25 includes a transflective material, and a resonant cavity is formed between the lower electrode 23 and the upper electrode 25. The first part 231 of the bottom electrode is a reflective metal layer, such as silver or an alloy containing silver. The second part 232 of the lower electrode is an optical adjustment layer formed of a transparent conductive metal. For example, the material of the second part 232 of the lower electrode may be indium tin oxide or indium zinc oxide.

Because the two-layer structure or multi-layer structure of the bottom electrode is a common structure in organic light-emitting display devices, there is no need to increase the number of bottom electrode film layers and the corresponding film forming process on the basis of the prior art, and use two or more layers. The bottom electrode of the layer structure only needs to form a pixel definition layer according to the shape of the bottom electrode, which can cut off part of the organic film layer and prevent crosstalk between pixel units. Compared with the pixels formed by multiple film formation and etching For the definition layer, the process is simplified. In addition, as shown in FIG. 4, at the pixel definition layer, if part of the organic film layer 24 is not completely broken, a very thin continuous film layer is formed. However, because of the pixel definition layer, the organic film layer 24 and the lower The electrodes 23 are separated, and a current path with low resistance is not formed between the lower electrode and the upper electrode, so that light leakage does not occur in the area A, and the display effect of the organic light emitting display device is improved.

Optionally, the lower electrode may also have a structure other than that shown in FIG. 4. Please refer to FIGS. 7 to 10, which are schematic diagrams of the structure of the lower electrode in several embodiments.

7 is a schematic diagram of the structure of the bottom electrode in one embodiment. In FIG. 7, the width of the top surface of the first portion 231 of the bottom electrode is smaller than the width of the bottom surface of the second portion 232 of the bottom electrode. The angle of the second electrode part 232 meets the requirements, and the width relationship between the first part 231 of the bottom electrode and the second part 232 of the bottom electrode is not limited.

FIG. 8 is a schematic diagram of the structure of the lower electrode in another embodiment, and FIG. 9 is a schematic diagram of the structure of the lower electrode in the third embodiment. The lower electrode further includes a third portion 233 of the lower electrode under the first portion 231 of the lower electrode. The third portion 233 of the lower electrode is formed of a third conductive film layer different from the first portion 231 of the lower electrode and the second portion 232 of the lower electrode. In FIG. 8, the angle between the side and the bottom surface of the third portion 233 of the lower electrode is less than 90 degrees. In FIG. 9, the angle between the side edge and the bottom surface of the third portion 233 of the lower electrode is greater than 90 degrees. The structure of the third part 233 of the lower electrode can be in various forms, for example, it can also be arranged such that the side edge is perpendicular to the bottom surface. Figures 8 and 9 only schematically list two structures, but the present invention is not limited to these two structures. The third bottom electrode 233 does not affect the structure of the bottom electrode first part 231 and the bottom electrode second part 232. , It can be any structure.

FIG. 10 is a schematic diagram of the structure of the lower electrode in the fourth embodiment. The lower electrode further includes a third portion 233 of the lower electrode located above the second portion 232 of the lower electrode. The third portion 233 of the lower electrode is formed of a third conductive film layer different from the first portion 231 of the lower electrode and the second portion 232 of the lower electrode. Preferably, when the lower electrode third portion 233 is located above the lower electrode second portion 232, the bottom surface width of the lower electrode third portion 233 is less than or equal to the top surface width of the lower electrode second portion 232, and the side surface of the lower electrode third portion 233 The angle with the bottom surface is less than 90 degrees, and the side surface of the third part 233 of the lower electrode is a gentle slope structure, which is beneficial to the formation of a continuous film layer when the upper electrode located on it forms a film.

The organic light-emitting layer 24 is a structure in which a multilayer film layer is laminated, and it is only necessary to disconnect the film layer with high carrier mobility that is prone to lateral leakage in the multilayer film layer between the pixel units. Specifically, as shown in FIG. 4, the organic light-emitting layer 24 may include a first organic film layer 241 and a second organic film layer 242 disposed on the first organic film layer 241. The first organic film layer 241 includes an organic film layer with high carrier mobility and easy lateral conduction. The organic film layer in the second organic film layer 242 has a low carrier mobility and is not prone to lateral conduction. It is only necessary to disconnect the first organic film layer 241 between the pixel units, and ensure that the second organic film layer 242 is a continuous structure between the pixel units, and then the upper electrode 25 formed on the second organic film layer 242 is A continuous structure can also be formed on the continuous structure of the second organic film layer 242 to ensure the transmission of the upper electrode signal between each pixel unit.

Optionally, the thickness of the first organic film layer 241 is set to be less than or equal to the thickness of the first portion 231 of the lower electrode, and the first organic film layer 241 is disconnected at the pixel defining layer 26. The sum of the thicknesses of the first organic film layer 241 and the second organic film layer 242 is set to be greater than the thickness of the first portion 231 of the lower electrode, and at the same time, because the sides of the second portion 232 of the lower electrode and the top surface of the first portion 231 of the lower electrode are sandwiched The angle α2 is less than 90 degrees. The second portion 262 of the pixel definition layer also forms a structure in which the angle α2 with the top surface of the first portion 231 of the lower electrode is less than 90 degrees in accordance with the shape of the side of the second portion 232 of the lower electrode, that is, the pixel The second portion 262 of the definition layer forms a gentle slope, and when each layer of the second organic film layer 242 is formed on the gentle slope, a continuous layer structure is formed.

Optionally, the first organic film layer 241 may include a hole injection layer and a hole transport layer that are sequentially stacked. The hole injection layer and the hole transport layer have high carrier mobility and are prone to lateral leakage between pixel units. Therefore, the hole injection layer and the hole transport layer are set in a disconnected structure. The second organic film layer 242 on the hole injection layer and the hole transport layer includes other film layers, which have low carrier mobility and do not need to be disconnected between pixel units. For example, the second organic film layer 242 includes an electron blocking layer, an organic light-emitting material layer, a hole blocking layer, an electron transport layer, etc., which are sequentially stacked.

Optionally, the organic light-emitting display unit includes two superimposed organic light-emitting units, and each organic light-emitting unit includes a film layer with a larger carrier mobility, and these film layers need to be disconnected between the pixel units. For example, the first organic film layer includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, a first organic light-emitting material layer, a first hole blocking layer, a charge generation layer, and a Two hole injection layer, second hole transport layer. The second organic film layer includes a second electron blocking layer, a second organic light-emitting material layer, a second hole blocking layer, and an electron transport layer that are sequentially stacked.

Optionally, the organic light emitting display device provided by the embodiment of the present invention is a silicon-based micro organic light emitting display device. The silicon-based miniature organic light-emitting display device is based on a single crystal silicon chip, and the pixel size is 1/10 of that of the traditional display device, and the fineness is much higher than that of the traditional device, and can be used to form a micro display. Silicon-based micro organic light-emitting display devices have a broad market application space, and are particularly suitable for use in helmet-mounted displays, stereoscopic display mirrors, and glasses-type displays. Because of the small pixel size of the silicon-based micro organic light-emitting display device, each film layer of the organic light-emitting layer is easier to display crosstalk. Therefore, the structure provided by the embodiment of the present invention is more suitable for silicon-based micro organic light-emitting display devices, and can improve the silicon-based micro organic light-emitting display. The display effect of the device.

Note that the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made to those skilled in the art without departing from the protection scope 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 can also include more other equivalent embodiments without departing from the concept of the present invention. The scope of is determined by the scope of the appended claims.

Claims

An organic light emitting display device, wherein the organic light emitting display device includes a plurality of organic light emitting units; each of the organic light emitting units includes a lower electrode arranged on a substrate, and an organic light emitting device arranged on the lower electrode. Layer, an upper electrode disposed on the organic light-emitting layer;

The lower electrode includes a first portion of a lower electrode and a second portion of the lower electrode that are stacked; the first portion of the lower electrode is disposed on the substrate, and the side of the first portion of the lower electrode is The included angle is greater than or equal to 90 degrees; the second part of the bottom electrode is disposed on the first part of the bottom electrode, and the included angle between the side of the second part of the bottom electrode and the top surface of the first part of the bottom electrode Less than 90 degrees;

It also includes a pixel definition layer disposed between the plurality of organic light emitting units and covering the side of the lower electrode, and the pixel definition layer includes a first part of the pixel definition layer covering the side of the first part of the lower electrode The second part of the pixel definition layer covering the side of the second part of the lower electrode; the angle between the first part of the pixel definition layer and the substrate is greater than or equal to 90 degrees; the second part of the pixel definition layer and the The included angle of the top surface of the first part of the lower electrode is less than 90 degrees;

The organic light-emitting layer of the plurality of organic light-emitting units includes multiple organic film layers, and at least part of the organic film layers are disconnected at the pixel defining layer.
3. The organic light emitting display device of claim 1, wherein the angle between the side of the first part of the bottom electrode and the substrate is greater than 135 degrees and less than or equal to 150 degrees.
3. The organic light emitting display device of claim 1, wherein the angle between the side of the second portion of the bottom electrode and the top surface of the first portion of the bottom electrode is greater than or equal to 30 degrees and less than or equal to 60 degrees.
8. The organic light emitting display device of claim 1, wherein the bottom electrode further comprises a third part of the bottom electrode disposed under the first part of the bottom electrode.
8. The organic light emitting display device of claim 1, wherein the bottom electrode further comprises a third part of the bottom electrode disposed above the second part of the bottom electrode.
5. The organic light emitting display device of claim 1, wherein the organic light emitting layer comprises a stacked first organic film layer, and a stacked second organic film layer disposed on the first organic film layer; The first organic film layer is disconnected at the pixel definition layer.
7. The organic light emitting display device of claim 6, wherein the thickness of the first organic film layer is less than or equal to the thickness of the first portion of the lower electrode; the first organic film layer and the second organic film layer The sum of the thickness of the film layer is greater than the thickness of the first part of the lower electrode.
8. The organic light emitting display device of claim 7, wherein the upper electrodes of the plurality of organic light emitting units are connected to each other.
8. The organic light emitting display device of claim 7, wherein:

The first organic film layer includes a hole injection layer and a hole transport layer that are stacked in sequence;

The second organic film layer includes an electron blocking layer, an organic light-emitting material layer, a hole blocking layer, and an electron transport layer that are sequentially stacked.
7. The organic light emitting display device of claim 7, wherein the first organic film layer comprises a first hole injection layer, a first hole transport layer, a first electron blocking layer, and a first An organic light-emitting material layer, a first hole blocking layer, a charge generation layer, a second hole injection layer, and a second hole transport layer;

The second organic film layer includes a second electron blocking layer, a second organic light-emitting material layer, a second hole blocking layer, and an electron transport layer that are sequentially stacked.
3. The organic light emitting display device of claim 1, wherein the organic light emitting display device is a silicon-based micro organic light emitting display device.