CN108550713B

CN108550713B - Organic light emitting display panel and display device thereof

Info

Publication number: CN108550713B
Application number: CN201810403209.0A
Authority: CN
Inventors: 舒鹏; 王湘成; 安平; 牛晶华; 刘营
Original assignee: Shanghai Tianma AM OLED Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2020-03-13
Anticipated expiration: 2038-04-28
Also published as: CN108550713A

Abstract

The embodiment of the invention provides an organic light-emitting display panel and a display device thereof, relates to the technical field of display, and is used for improving viewing angle color cast under an oblique viewing angle. The organic light-emitting display panel comprises a pixel defining layer, wherein the pixel defining layer is provided with a plurality of opening areas which are arranged in an array manner and a spacing area which is positioned between two adjacent opening areas; a plurality of light emitting elements, at least one of the light emitting elements being located in one of the opening regions of the pixel defining layer; a cathode layer and an anode layer, the light emitting element being located between the cathode layer and the anode layer; wherein the cathode layer includes a first region corresponding to the opening region of the pixel defining layer and a second region corresponding to the spacer region of the pixel defining layer, and a thickness of the second region of the cathode layer is greater than a thickness of the first region in a direction perpendicular to a surface of the organic light emitting display panel. The organic light emitting display panel is suitable for a display device.

Description

Organic light emitting display panel and display device thereof

Technical Field

The invention relates to the technical field of display, in particular to an organic light-emitting display panel and a display device thereof.

Background

The most information-receiving sense organs of human beings are the visual organs (eyes), and people are increasingly required to utilize abundant visual information in production and life, so that display technology plays a very important role in the human society today. Display technology is emerging from the present, the technology development is also very rapid, and with the development of society and the continuous improvement of human demand for living of materials, the current display technology is rapidly advancing towards high contrast, high resolution, full-color display, low power consumption, high reliability, long service life and thinness and lightness.

Among them, the Organic Light-Emitting Diode (OLED) display device has the advantages of self-luminescence, fast response speed, wide viewing angle, high definition, high brightness, strong bending resistance, low power consumption, etc., and is gradually becoming a powerful competitor of the liquid crystal display panel, and is known as the next generation of illusive display technology.

Viewing angle color shift, especially color shift under oblique viewing angles, is a problem which is ubiquitous and needs to be solved urgently in OLED display devices.

Disclosure of Invention

In view of the above, embodiments of the present invention provide an organic light emitting display panel and a display device thereof for improving color shift at an oblique viewing angle.

In a first aspect, the present invention provides an organic light emitting display panel including:

the pixel definition layer is provided with a plurality of opening areas which are arranged in an array mode and a spacing area which is positioned between every two adjacent opening areas;

a plurality of light emitting elements, at least one of the light emitting elements being located in one of the opening regions of the pixel defining layer;

a cathode layer and an anode layer, the light emitting element being located between the cathode layer and the anode layer; wherein the content of the first and second substances,

the cathode layer includes a first region corresponding to the opening region of the pixel defining layer and a second region corresponding to the spacer region of the pixel defining layer, and a thickness of the second region of the cathode layer is greater than a thickness of the first region in a direction perpendicular to a surface of the organic light emitting display panel.

Optionally, in a direction from the anode layer to the cathode layer, both the first region and the second region have a single-layer structure.

Optionally, the first region has a thickness of H1, wherein 7nm < H1<20 nm.

Optionally, in a direction from the anode layer to the cathode layer, a difference between a thickness of the first region and a thickness of the second region is D, where D is greater than or equal to 30nm and less than or equal to 100 nm.

Optionally, the material of the first region is the same as the material of the second region.

Optionally, the material of the first region and the material of the second region are both metal silver or an alloy of metal silver and metal magnesium.

Optionally, in a direction from the anode layer to the cathode layer, the first region and the second region each include a first layer, and the first region further includes a second layer disposed on a side surface of the first layer close to the anode layer.

Optionally, the material of the first layer is the same as the material of the second layer.

Optionally, the first layer is made of magnesium-silver alloy or metallic silver, and the second layer is made of rare earth metal elements.

Optionally, the second layer is made of ytterbium or samarium.

Optionally, in a direction perpendicular to the organic light emitting display panel, a side surface of a region where the second region is connected to the first region is an inclined surface;

wherein an included angle between the inclined plane and the orthographic projection of the inclined plane on the organic light-emitting display panel is α, and 0 degrees < α < 90 degrees.

In a second aspect, the present invention provides a display device including the organic light emitting display panel according to the first aspect.

Any one of the above technical solutions has the following beneficial effects:

according to the scheme, the film thickness is in direct proportion to the wavelength of the emergent light color, so that in the direction perpendicular to the organic light-emitting display panel, after the thickness of the second region of the cathode layer is larger than that of the first region, the color wavelength of the emergent light at the oblique viewing angle shifts towards the long wavelength side, namely the wavelength of the emergent light color at the oblique viewing angle is equal to or close to the intrinsic peak of the emergent light color at the normal viewing angle, the emergent light color obtained at the oblique viewing angle is close to the emergent light color at the normal viewing angle, the viewing angle color shift condition at the oblique viewing angle is improved, and the display quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an organic light emitting display panel according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the AA' position of FIG. 3 according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view at the position DD' in FIG. 5 according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the invention;

FIG. 8 is a cross-sectional view at the position BB' in FIG. 7 according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of the embodiment of the present invention at the position CC' in FIG. 9;

fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, etc. may be used herein to describe regions in embodiments of the present invention, these regions should not be limited by these terms. These terms are only used to distinguish one region from another. For example, a first region may also be referred to as a second region, and similarly, a second region may also be referred to as a first region, without departing from the scope of embodiments of the present invention.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.

Before the present embodiment is described in detail, the structure of the organic light emitting display panel will be briefly described:

for an organic light emitting display panel, taking an on-cell (on-cell) manner as an example to implement a touch function, as shown in fig. 1, which is a schematic structural diagram of the organic light emitting display panel provided in an embodiment of the present invention, an organic light emitting display panel 100 includes a first substrate 41, a plurality of light emitting elements 15 disposed on a side surface of the first substrate 41, the organic light emitting display panel 100 includes the first substrate 41 and a thin film encapsulation layer 42 disposed oppositely, and a thin film transistor 5, the light emitting elements 15 and a pixel defining layer 11 are disposed between the first substrate 41 and the thin film encapsulation layer 42. The thin film transistor 5 specifically includes an active layer 51, a gate electrode 52, a source electrode 53, and a drain electrode 54, and the light emitting element 15 specifically includes an anode block 171, a light emitting unit 151, and a first region 131 corresponding to the cathode layer 13. Wherein the light emitting unit 151 of the light emitting element 15 corresponds to the opening region 111 of the pixel defining layer 11. The anode layer 17 includes a plurality of anode blocks 171.

It is understood that the first substrate 41 in this embodiment may be a flexible substrate, and the corresponding organic light emitting display panel 100 may be a flexible organic light emitting display panel, and the flexible organic light emitting display panel has special effects of low power consumption and being bendable, and is suitable for various display devices, especially for wearable display devices. Optionally, the flexible substrate is made of polyester imide or polyethylene terephthalate resin. In addition, the first substrate 41 may also be a rigid substrate, and the corresponding organic light emitting display panel 100 is a rigid organic light emitting display panel. In fact, the material of the organic light emitting display panel is not particularly limited in this embodiment.

In this embodiment, a positive voltage may be applied to the anode layer 17 during electroluminescence. The anode layer 17 in this embodiment may be made of ito. In particular, the anode layer 17 comprises at least a reflective film, which may be located on a surface of the anode layer 17 facing away from the first substrate 41, and the material of the reflective film may be silver. The anode layer 17 may further include a transparent conductive film on a surface of the reflective film facing away from the first substrate 41, and the transparent conductive film may be made of indium tin oxide or indium zinc oxide.

In this embodiment, a negative voltage may be applied to the cathode layer 13 during electroluminescence. The material of the cathode 14 may be a low-function metal material such as Ag, Al, Ca, In, Li, Mg, or a low-work-function composite metal material. The material of the cathode 14 in this example may be one of a silver alloy, a silver-ytterbium alloy, or a silver-rare earth metal alloy.

It is understood that the organic light emitting display panel 100 has m light emitting colors, m is an integer greater than or equal to 3, and the exemplary embodiment may include three light emitting colors, red, green and blue, respectively, and each light emitting element 15 corresponds to one light emitting color.

In order to clearly understand the present embodiment, the following briefly describes the light emitting principle of the organic light emitting display panel of the present embodiment:

as shown in fig. 2, which is a schematic diagram of the organic light emitting display panel according to the embodiment of the present invention, for any one of the light emitting elements 15, a positive voltage is applied to the anode layer 17, a negative voltage is applied to the cathode layer 13, holes generated in the anode layer 17 are injected into the corresponding light emitting unit 151, electrons generated in the cathode layer 13 are injected into the corresponding light emitting unit 151, the electrons and the holes are recombined to generate excitons, and the excitons are generated by the laser radiation transition, so that the organic light emitting display panel emits light.

With continued reference to fig. 1, the organic light emitting display panel 100 in this example may be understood as a top emission organic light emitting display panel, that is, the anode layer 17 may be understood as a total reflection anode, and the cathode layer 13 may be understood as a semi-transparent cathode, the cathode being disposed at a side away from the first substrate 41. When the length of the microcavity and the wavelength of the light wave satisfy a certain relationship, the light with a specific wavelength (the wavelength of a certain monochromatic light) is enhanced, the spectrum is narrowed, and the microcavity effect is generated. The microcavity effect has the functions of selecting, narrowing and enhancing a light source, and is often used to improve the chromaticity of the device, enhance the emission intensity of a specific wavelength, change the light emission color of the device, and the like.

In the prior art, the microcavity effect includes two interference modes, namely wide-angle interference and multi-beam interference, wherein the wide-angle interference affects the viewing angle characteristics of the device, that is, the luminance difference and chromaticity drift are caused by the shift of the light-emitting peak along with the shift of the viewing angle, and particularly under an oblique viewing angle, the microcavity effect has poor optical properties and more serious color cast.

In order to solve the above problems, the inventors have devised the following technical solutions:

fig. 3 is another schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention, as shown in fig. 3 and fig. 4, wherein a pattern representing the cathode layer 13 is made semi-transparent for clearly showing a film relationship between the cathode layer 13 and the light emitting element 15, and fig. 4 is a cross-sectional view of an AA' position in fig. 3 according to an embodiment of the present invention. As shown in fig. 4, the organic light emitting display panel 100 includes a pixel defining layer 11, the pixel defining layer 11 is provided with a plurality of opening regions 111 arranged in an array, and a spacing region 113 located between two adjacent opening regions 111, the pixel defining layer 11 in this embodiment defines an opening area of the light emitting element 15, that is, the maximum opening area of the light emitting element 15 is the same as the area of the opening region 111 of the pixel defining layer 11, and of course, the opening area of the light emitting element 15 may also be smaller than the opening area of the opening region 111 of the pixel defining layer 11, which is not limited in this embodiment, and the relationship between the two may be determined according to specific products.

With continued reference to fig. 3 and 4, the organic light emitting display panel 100 further includes a plurality of light emitting elements 15, wherein at least one light emitting element 15 is located within one of the open regions 111 of the pixel defining layer 11. The organic light emitting display panel 100 further includes a cathode layer 13 and an anode layer 17, and the light emitting element 15 is located between the cathode layer 13 and the anode layer 17.

In the present embodiment, with the orientation shown in fig. 4 as a reference, each light emitting element 15 comprises an anode block 171, a light emitting unit 151 and a corresponding first region 131 disposed on the cathode layer 13, wherein the orthographic projection of the first region 131 in the first substrate 41, the orthographic projection of the light emitting unit 151 in the first substrate 41 and the orthographic projection of the anode block 171 in the first substrate 41 overlap or even overlap. And a plurality of anode blocks 171 constitute the anode layer 17.

As shown in fig. 3 and 4, the cathode layer 13 includes a first region 131 corresponding to the opening region 111 of the pixel defining layer 11 and a second region 133 corresponding to the spacer region 113 of the pixel defining layer 11, the first region 131 of the cathode layer 13 has a thickness of H1 and the second region 133 of the cathode layer 13 has a thickness of H2 in a direction perpendicular to the organic light emitting display panel 100, wherein the thickness of the second region 133 is greater than that of the first region 131, i.e., H2> H1.

In the conventional technique, in the case of increasing the oblique viewing angle, the resonance wavelength shifts to a shorter wavelength side (blue shift) as the viewing angle increases, and thus the color of light emitted from the organic light emitting display panel deviates from the color at the front viewing angle, that is, color shift occurs.

It can be understood that the angle when the eye screen is vertical can be understood as a normal viewing angle, and the angle is set to be 0 degrees, taking the direction of the screen as an example, when the eye looks at the screen, the eye can be considered as being vertical to the screen, and the viewing angle is 0 degrees; squint angle refers to an angle value greater than 0 ° and less than 90 ° and is an absolute value, for example, 45 ° to the right for an oblique angle of 45 °, 45 ° to the left for an oblique angle of 45 °. Since the thickness of the film layer is proportional to the wavelength of the light emission color, in a direction perpendicular to the organic light emitting display panel 100, when the thickness of the second region 133 of the cathode layer 13 is greater than the thickness of the first region 131, the color wavelength of the light emitted at the oblique viewing angle shifts toward the long wavelength side, that is, the wavelength of the light emission color at the oblique viewing angle is equal to or close to the intrinsic peak of the light emission color at the normal viewing angle, so that the light emission color obtained at the oblique viewing angle is close to the light emission color at the normal viewing angle, the viewing angle color shift at the oblique viewing angle is improved, and the display quality is improved.

It is to be added that, as shown in fig. 3 and 4, the first regions 131 may be disposed in one-to-one correspondence with the light emitting units 151, as an example; as shown in fig. 5 and 6, fig. 5 is another schematic structural diagram of the organic light emitting display panel according to the embodiment of the present invention, for example, to clearly show the film layer relationship, so that the cathode layer 13 is made semi-transparent, fig. 6 is a cross-sectional view of the position DD' in fig. 5 according to the embodiment of the present invention, the first region 131 may correspond to a plurality of light emitting units 151, and as shown in fig. 5 and 6, for example, one first region 131 corresponds to an upper light emitting unit 151. However, in fact, the correspondence relationship between the first region 131 and the light emitting unit 151 may be determined according to a specific product, and is not particularly limited in the present embodiment.

Inevitably, the area of the first region 131 is defined by the opening region 111, and when one first region 131 corresponds to a plurality of light emitting units 151, the opening of the opening region 111 is correspondingly enlarged.

Further, with continued reference to fig. 4 and 6, in the direction from the anode layer 17 to the cathode layer 13 (as indicated by the arrow in the figure), the first region 131 and the second region 133 are both of a single-layer structure. It can also be understood that the first region 131 and the second region 133 have different thicknesses, and the other regions are the same, for example, the two regions have the same material, the same sheet resistance, the same manufacturing process, and the like, so that the process flow is simplified and the cost is saved while the color cast at the oblique angle is improved.

Furthermore, the thickness of the first region 131 in this embodiment is H1, wherein 7nm < H1<20 nm. Taking a top emission microcavity structure as an example, the cathode is a semitransparent structure, and at this time, the thickness of the first region 131 is too large, and the light extraction rate is affected after the thickness exceeds 20 nm; if the thickness of the first region 131 is too small, below 7nm, the microcavity effect is significantly reduced, which is not favorable for emitting light.

In practice, the inventors have found, from trial and error, that the difference in thickness between the first region 131 and the second region 133, i.e. in the direction from the anode layer 17 to the cathode layer 13, the thickness of the first region 131 differs from the thickness of the second region 133 by a thickness D, wherein D is 30nm or less and 100nm or less. When the difference between the thickness of the second region 133 and the thickness of the first region 131 is greater than 100nm, since the second region 133 has a relatively large thickness, the wavelength of light emitted at an oblique viewing angle is shifted to a longer wavelength side by a relatively large amount, and color shift may occur; when the difference between the thicknesses of the first and second regions is less than 30nm, the increased thickness of the second region 133 is not enough to compensate for the color shift caused by the viewing angle, and thus the color shift is not easily eliminated.

In one embodiment, the material of the first region 131 is the same as the material of the second region 133. The two materials are the same, so that the preparation can be carried out simultaneously, the preparation flow is simplified, and the cost is saved.

Further, the material of the first region 131 and the material of the second region 133 may be metallic silver or an alloy of metallic silver and metallic magnesium. In this embodiment, the work function of the metal silver or the alloy of the metal silver and the metal magnesium is low, which is beneficial for the electrons generated by the cathode to jump to the light emitting unit, so that the recombination rate of the electrons and the holes is improved, and the light emitting efficiency is improved. And the conductivity of the two is good, the price is low, and the cost is saved.

In an implementation manner, as shown in fig. 7 and fig. 8, fig. 7 is another schematic structural diagram of an organic light emitting display panel provided in an embodiment of the present invention, fig. 8 is a cross-sectional view of a position BB' in fig. 7 provided in an embodiment of the present invention, in a direction from an anode layer 17 to a cathode layer 13 (as shown by an arrow in fig. 8), a first region 131 and a second region 133 both include a first layer 1301, the first region 131 further includes a second layer 1302, and the second layer 1302 is disposed on a side surface of the first layer 1301 close to the anode layer 17.

As shown in fig. 8, the first region 131 includes a first layer 1301 and a second layer 1302, two different film layers, the second layer 1302 near the light emitting unit 151 side may be prepared as a low work function film layer to facilitate injection of electrons, and the first layer 1301 may be prepared as a film layer having a better conductivity to facilitate transport of electrons.

Of course, as can be seen from the above embodiments, the entire thickness of the first region 131 is smaller than the entire thickness of the second region 132, and when light is emitted from an oblique angle or an oblique angle, since the second region 133 has a convex structure, the thickness of the second region 133 is increased, and the wavelength of the emitted light is shifted toward the long wavelength side, so that the wavelength is closer to the intrinsic peak, and the color shift at the angle of view can be significantly improved.

Further, the material of the first layer 1301 and the material of the second layer 1302 may be the same or different. In one embodiment, the first layer 1301 and the second layer 1302 are made of the same material, and both may be made of metal silver or metal magnesium silver alloy. The work function of the metal silver or the alloy of the metal silver and the metal magnesium is low, and the transition of electrons generated by the cathode to the light-emitting unit is facilitated, so that the recombination rate of the electrons and holes is improved, and the light-emitting efficiency is improved. And the conductivity of the two is good, the price is low, and the cost is saved.

In another embodiment, the material of the first layer 1301 can be magnesium-silver alloy or metallic silver, and the material of the second layer 1302 can be a rare earth metal element. The rare earth metal element has smaller work function and is beneficial to the injection of electrons.

Further, the second layer 1302 is made of ytterbium or samarium. The work function of the ytterbium or samarium is small, so that electron transition to the corresponding light-emitting unit is facilitated, and the injection efficiency is improved.

In an embodiment, as shown in fig. 9 and 10, fig. 9 is another schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention, and fig. 10 is a cross-sectional view taken at a CC' position in fig. 9 according to an embodiment of the present invention, in a direction perpendicular to the organic light emitting display panel 100, a side surface of a region where the second region 133 meets the first region 131 is a slope 135, wherein an included angle between the slope 135 and a forward projection of the slope 135 on the organic light emitting display panel 100 is α, and wherein 0 ° < α < 90 °. in this embodiment, the side surface of the region where the first region 131 meets the second region 133 is set to be a slope, which facilitates preparation of the present film layer, such that thicknesses of the present film layer at various positions are uniform, and facilitates preparation of the film layer deposited on the present film layer in the direction perpendicular to the organic light emitting display panel 100, such that thicknesses of the film layer deposited on the present film layer are uniform.

In this embodiment, a display device is provided, as shown in fig. 11, which is a schematic structural diagram of the display device provided in the embodiment of the present invention, and the display device 500 includes the organic light emitting display panel 100 according to this embodiment. It should be noted that, although fig. 11 uses a mobile phone as an example, the display device is not limited to the mobile phone, and specifically, the display device may include, but is not limited to, any electronic device with a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), an MP4 player, or a television.

In this embodiment, since the display device 500 includes the organic light emitting display panel 100, it includes all technical features of the organic light emitting display panel 100, that is, since the film thickness is in direct proportion to the wavelength of the light emission color, in a direction perpendicular to the organic light emitting display panel 100, when the thickness of the second region 133 of the cathode layer 13 is greater than the thickness of the first region 131, the color wavelength of the light emitted at the oblique viewing angle is shifted toward the long wavelength side, that is, the wavelength of the light emission color at the oblique viewing angle is equal to or close to the intrinsic peak of the light emission color at the normal viewing angle, so that the light emission color obtained at the oblique viewing angle is close to the light emission color at the normal viewing angle, the viewing angle color shift at the oblique viewing angle is improved, and the display quality is provided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An organic light emitting display panel, comprising:

the cathode layer includes a first region corresponding to the opening region of the pixel defining layer and a second region corresponding to the spacer region of the pixel defining layer, and a thickness of the second region of the cathode layer is greater than a thickness of the first region in a direction perpendicular to a surface of the organic light emitting display panel;

the anode layer to on the direction of cathode layer, first region with the second region all includes the first layer, the material of first layer is magnesium silver alloy or metallic silver, first region still includes the second layer, the second layer sets up the first layer is close to a side surface of anode layer, the material of second layer is metal ytterbium.

2. The display panel of claim 1, wherein the first region has a thickness of H1, wherein 7nm < H1<20 nm.

3. The organic light-emitting display panel according to claim 1,

in the direction from the anode layer to the cathode layer, the difference between the thickness of the first region and the thickness of the second region is D, wherein D is more than or equal to 30nm and less than or equal to 100 nm.

4. The organic light-emitting display panel according to claim 1, wherein the second layer is made of samarium.

5. The organic light-emitting display panel according to claim 1,

in the direction vertical to the organic light-emitting display panel, the side surface of the region where the second region is connected with the first region is an inclined plane;

6. A display device characterized by comprising the display panel according to any one of claims 1 to 5.