WO2022016749A1

WO2022016749A1 - Display panel, method for manufacturing display panel, and display apparatus

Info

Publication number: WO2022016749A1
Application number: PCT/CN2020/129828
Authority: WO
Inventors: 王杲祯
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2020-07-21
Filing date: 2020-11-18
Publication date: 2022-01-27
Also published as: CN111863902A; CN111863902B

Abstract

A display panel, a method for manufacturing a display panel, and a display apparatus. According to the display panel, blue-light compensation patterns are added around blue sub-pixel regions, and the characteristic of the blue-light compensation patterns absorbing light of which the wavelength is greater than the wavelength of blue light and converting the light into blue light is used to ameliorate the problem of color shift of an OLED display panel due to blue-light attenuation, and also solve the problem of color mixing due to abnormal film plating to the blue sub-pixel regions.

Description

Display panel, display panel manufacturing method and display device

technical field

The present invention relates to the field of display technology, and in particular, to a display panel, a method for manufacturing the display panel and a display device.

Background technique

After more than 30 years of development, the organic light-emitting diode (Organic Light-Emitting Diode, OLED for short) display technology is widely used in lighting, display and other fields. The OLED display panel has the advantages of high brightness, high contrast, low power consumption, fast response speed, wide viewing angle, etc. In addition, because the OLED display panel has the characteristics of self-illumination, no additional backlight is required, so the OLED display panel has the advantages of thin thickness and light weight. The characteristics of the display are in line with the development trend of thin and light displays.

technical problem

At present, in the preparation process of OLED display panels, precision metal masks (Fine Metal Mask, FMM), the small molecule organic light-emitting material is evaporated on the sub-pixel area of the substrate, thereby forming the light-emitting layer of the sub-pixel unit. During the evaporation process, there is usually a certain gap between the substrate and the FMM, so as to avoid the direct contact between the FMM and the substrate, which will negatively affect the light-emitting layer, and there is generally no barrier around the evaporation area to limit the evaporation range. , therefore, according to the characteristics of evaporation along a straight line during the evaporation process, the scope of the evaporation area will continue to expand during the evaporation process, thereby causing the shadow effect of the evaporation area. effect), and then there may be a problem of color mixing, such as: red light-emitting material or green light-emitting material is evaporated to the blue sub-pixel area. In addition, the blue light-emitting material has the defect of short lifespan, which leads to the problem of color shift due to the attenuation of blue light after the OLED display panel is used for a period of time, thereby shortening the service life of the OLED display panel.

technical solutions

In view of the shortcomings of the prior art, the main purpose of the present invention is to provide a display panel, a method for fabricating a display panel and a display device. The problem of color mixing in the blue sub-pixel area is caused. On the other hand, the problem of color shift of the OLED display panel caused by the attenuation of blue light is improved to a certain extent.

In order to achieve the foregoing object of the present invention, in a first aspect, the present invention provides a display panel, comprising:

a substrate, the substrate is divided into a plurality of sub-pixel regions, and the plurality of sub-pixel regions include blue sub-pixel regions;

a first electrode layer, disposed on the substrate, including a plurality of first electrodes distributed in an array, with an opening area between adjacent first electrodes;

a plurality of blue light compensation patterns, respectively disposed in each of the opening regions adjacent to the blue sub-pixel region, and the blue light compensation patterns are used for absorbing light with a wavelength greater than that of blue light and converting it into blue light;

A pixel definition layer, disposed on the substrate, includes a plurality of bank portions distributed in an array to define each of the sub-pixel regions, each of the bank portions respectively covers each of the opening regions, and the adjacent bank portions are separated from each other. The gap area between them is defined as a sub-pixel area, and the bottom of each sub-pixel area is a first electrode;

A plurality of sub-pixel units are respectively arranged in each of the sub-pixel areas, the sub-pixel units in the blue sub-pixel area are blue sub-pixel units, and the blue sub-pixel units are adjacent to each of the blue light compensation pattern connections; and

A second electrode layer is disposed on each of the sub-pixel units.

In some embodiments of the present invention, the material of the blue compensation pattern is a host material doped with rare earth ions, and the host material is one of halides, oxides, oxyhalides, sulfur-containing compounds and sulfur oxides At least one of the rare earth ions is at least one of Er ³⁺ , Tm ³⁺ , Dy ³⁺ , Ho ³⁺ , Eu ³⁺ and Tb ³⁺ .

In some embodiments of the present invention, the material of the blue compensation pattern is sodium tetrafluoroyttrium ^{doped with Er 3+ .}

In some embodiments of the present invention, each of the blue light compensation patterns is respectively attached to the edge of the first electrode at the bottom of the adjacent blue sub-pixel unit; or, each of the blue light compensation patterns is respectively adjacent to the edge of the first electrode. The blue sub-pixel unit is turned on.

In some embodiments of the present invention, the display panel further includes: an encapsulation layer disposed on the second electrode layer.

In some embodiments of the present invention, the encapsulation layer includes: a first inorganic layer, an organic layer and a second inorganic layer that are stacked in sequence, and the materials of the first inorganic layer and the second inorganic layer are are respectively at least one of silicon nitride (SiN _x ), silicon oxide (SiO _x ) and aluminum oxide (Al ₂ O ₃ ), and the materials of the organic layer are polymethyl methacrylate and hexamethyl dimethyl dimethyl dimethyl methacrylate At least one of silyl ethers.

In some embodiments of the present invention, the thickness of the first inorganic layer is 0.5 μm˜1.5 μm, the thickness of the second inorganic layer is 0.5 μm˜1.5 μm, and the thickness of the organic layer is 4.0 μm˜12.0 μm microns.

In some embodiments of the present invention, the substrate includes: a base substrate, and the base substrate is a rigid substrate or a flexible substrate.

In some embodiments of the present invention, the substrate further includes: a thin film transistor array layer stacked on the base substrate.

In some embodiments of the present invention, the first electrode layer is an anode layer, and the second electrode layer is a cathode layer.

In some embodiments of the present invention, the display panel further includes a plurality of spacers distributed in an array, and each of the spacers is respectively disposed on each of the embankments.

In some embodiments of the present invention, the width of the spacer is no greater than the width of the bank.

In some embodiments of the present invention, each of the sub-pixel units includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer that are stacked in sequence.

In a second aspect, the present invention provides a method for preparing a display panel, comprising the following steps:

providing a substrate on which a plurality of sub-pixel regions are predefined, the plurality of sub-pixel regions including blue sub-pixel regions;

A patterned first electrode layer is prepared on the substrate, the first electrode layer includes a plurality of first electrodes distributed in an array, and an opening area is formed between adjacent first electrodes;

In each of the opening regions adjacent to the predefined blue sub-pixel regions, a blue light compensation pattern is prepared and formed respectively, and the blue light compensation pattern is used for absorbing light with a wavelength greater than that of the blue light and converting it into blue light;

A patterned pixel definition layer is formed on the substrate, the pixel definition layer includes a plurality of bank portions distributed in an array, each bank portion covers each of the opening regions, and the adjacent bank portions are separated The gap area between them is defined as a sub-pixel area, and the bottom of each sub-pixel area is a first electrode;

A sub-pixel unit is prepared and formed in each of the sub-pixel regions, and the blue sub-pixel unit in the blue sub-pixel region is connected to each of the adjacent blue light compensation patterns; and

A second electrode layer is prepared and formed on each of the sub-pixel units.

In some embodiments of the present invention, the manufacturing method of the display panel further includes the step of: forming an encapsulation layer on the second electrode layer.

In some embodiments of the present invention, the preparing and forming an encapsulation layer on the second electrode layer includes the step of: preparing and forming a first inorganic layer, an organic layer and a first inorganic layer on the second electrode layer in sequence. The second inorganic layer, the materials of the first inorganic layer and the second inorganic layer are respectively at least one _{of silicon nitride (SiN x} ), silicon oxide (SiO _x ) and aluminum oxide (Al ₂ O _{3 ).} , the material of the organic layer is at least one of polymethyl methacrylate and hexamethyldisiloxane.

In some embodiments of the present invention, providing a substrate is to provide a thin film transistor array substrate.

In some embodiments of the present invention, forming a sub-pixel unit in each of the sub-pixel regions is to sequentially prepare and form a hole injection layer, a hole transport layer, and a light-emitting layer in each of the sub-pixel regions. layer, an electron transport layer and an electron injection layer.

In a third aspect, the present invention provides a display device, comprising a display panel, the display panel comprising:

A second electrode layer is disposed on each of the sub-pixel units.

beneficial effect

The present invention provides a display panel, a method for manufacturing the display panel, and a display device using the display panel. The difference from the existing OLED display panel is that the improved display panel of the present invention adds a blue light compensation pattern around the blue sub-pixel area, and utilizes the blue light compensation pattern to absorb light with a wavelength greater than that of the blue light and convert it into blue light, that is, : The red light-emitting material and/or green light-emitting material that is abnormally evaporated to the blue sub-pixel area can be absorbed and converted into blue light to improve the color shift problem of the OLED display panel due to the attenuation of blue light, thereby improving the display quality; In addition, at the same time, the problem that the red light-emitting material and/or the green light-emitting material is abnormally evaporated to the blue sub-pixel area, causing color mixing in the blue sub-pixel area, is solved.

The display panel provided by the present invention is applied to a display device, which has the advantages of long service life and high display quality. product or component.

Description of drawings

FIG. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a substrate divided into a plurality of sub-pixel regions according to an embodiment of the present invention.

FIG. 3 is a schematic diagram 1 of the connection between the blue sub-pixel unit and each of the adjacent blue light compensation patterns in an embodiment of the present invention.

FIG. 4 is a second schematic diagram of the connection between the blue sub-pixel unit and each of the adjacent blue light compensation patterns in an embodiment of the present invention.

FIG. 5 is a flowchart of a method for manufacturing a display panel provided in an embodiment of the present invention.

Embodiments of the present invention

In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, preferred embodiments of the present invention are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings. Furthermore, the directional terms mentioned in the present invention, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", "side", etc., Only refer to the directions of the attached drawings. Therefore, the directional terms used are for describing and understanding the present invention, not for limiting the present invention.

Specifically, in the first aspect, an embodiment of the present invention provides a display panel, as shown in FIG. 1 and FIG. 2 , which mainly includes a substrate 1 , a first electrode layer 2 , a plurality of blue light compensation patterns 3 , and a pixel A definition layer 4 , a plurality of sub-pixel units 5 and a second electrode layer 6 are defined.

The substrate 1 is divided into a plurality of sub-pixel regions 10 , and the plurality of sub-pixel regions 10 includes a blue sub-pixel region 101 .

The first electrode layer 2 is disposed on the substrate 1 and includes a plurality of first electrodes 21 distributed in an array, and an opening area 22 is formed between adjacent first electrodes 21 .

The plurality of blue light compensation patterns 3 are respectively disposed in each of the opening regions 22 adjacent to the blue sub-pixel region 101, and the blue light compensation patterns 3 are used for absorbing light with a wavelength greater than that of blue light and converting it into blue light. .

The pixel definition layer 4 is disposed on the substrate 1 , and includes a plurality of bank portions 41 distributed in an array to define each of the sub-pixel regions 10 , and each of the bank portions 41 respectively covers each of the opening regions 22 . A gap area between adjacent banks 41 is defined as the sub-pixel area 10 , and the bottom of each of the sub-pixel areas 10 is the first electrode 21 .

The plurality of sub-pixel units 5 are respectively disposed in each of the sub-pixel areas 10, and the sub-pixel units 5 in the blue sub-pixel area 101 are blue sub-pixel units 51, and the blue sub-pixel units 51 and The adjacent blue light compensation patterns 3 are connected.

The second electrode layer 6 is disposed on each of the sub-pixel units 5 .

Specifically, the substrate 1 includes a substrate substrate 11, which is a rigid substrate or a flexible substrate, wherein the material of the rigid substrate can be transparent glass, transparent plastic, etc., and the material of the flexible substrate Can be polyimide (PI), polyethersulfone (PES), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), many Aryl compounds (PAR), glass fiber reinforced plastics (FRP) and other polymer materials. In the embodiment of the present invention, preferably, the base substrate 11 is made of glass.

In some embodiments, the substrate 1 further includes a thin film transistor (Thin Film Transistor) Transistor, TFT) array layer 12 , the TFT array layer 12 is stacked on the base substrate 11 .

In some embodiments, the plurality of sub-pixel regions 10 further include a red sub-pixel region 102 and a green sub-pixel region 103. Correspondingly, the sub-pixel unit 5 in the red sub-pixel region 102 is the red sub-pixel unit 52, and the The sub-pixel unit 5 of the green sub-pixel area 103 is the green sub-pixel unit 53 .

In some embodiments, the first electrode layer 2 is an anode layer, the second electrode layer 6 is a cathode layer, the first electrode layer 2 and the second electrode layer 6 respectively include a transparent conductive film, The material of the transparent conductive film can be indium tin oxide (Indium Tin Oxides, ITO) film, aluminum-doped zinc oxide film, carbon nanotube transparent conductive film, tin dioxide transparent conductive film, etc. The transparent conductive film is an ITO film.

In some embodiments, the material of the blue compensation pattern 3 is a host material doped with rare earth ions, and the host material is at least one of halides, oxides, oxyhalides, sulfur-containing compounds and sulfur oxides One, the rare earth ion is at least one ^{of Er 3+} , Tm ³⁺ , Dy ³⁺ , Ho ³⁺ , Eu ³⁺ and Tb ^{3+ .} In the embodiment of the present invention, preferably, the host material is sodium yttrium tetrafluoro (NaYF ₄ ), and the doped rare earth ion is Er ³⁺ .

In some embodiments, as shown in FIG. 3 , each of the blue light compensation patterns 3 is respectively attached to the edge of the first electrode 21 at the bottom of the adjacent blue sub-pixel unit 51 .

In some embodiments, as shown in FIG. 4 , each of the blue light compensation patterns 3 is connected to the adjacent blue sub-pixel units 51 respectively.

In some embodiments, the material of the pixel definition layer 4 is _{at least one of SiN x} and SiO _x , for example, the material of the pixel definition layer is SiN _x . The adjacent sub-pixel regions 10 are separated by the banks 41 .

In some embodiments, the display panel further includes a plurality of spacers 7 distributed in an array, each of the spacers 7 is respectively disposed on each of the embankments 41 , and the width of the spacers 7 is not greater than the The width of the bank portion 41 is such that the spacer 7 avoids the sub-pixel region 10 . The purpose of disposing the spacers 7 is to ensure that there is a certain gap between the substrate 1 and the FMM during the evaporation process, so as to prevent the FMM from damaging the display elements on the substrate 1 .

In some embodiments, each of the sub-pixel units 5 includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer stacked in sequence, and the light-emitting layers of the sub-pixel units of different colors The material is not the same.

In some embodiments, the entire surface of the second electrode layer 6 is disposed on each of the sub-pixel units 5 and each of the spacers 7 .

In some embodiments, the display panel further includes: an encapsulation layer 8 disposed on the second electrode layer 6 . The encapsulation layer 8 has the function of blocking water and oxygen, so as to prevent the components in the display panel from rapidly aging in the water and oxygen environment, thereby affecting the display quality of the display panel.

The encapsulation layer 8 includes a first inorganic layer 81 , an organic layer 82 and a second inorganic layer 83 that are stacked in sequence. The first inorganic layer 81 encapsulates the second electrode layer 6 , each of the sub-pixel units 5 and the pixel definition layer 4 therein. The cross-sectional length of the first inorganic layer 81 and the cross-sectional length of the second inorganic layer 83 are equal, the cross-sectional length of the organic layer 82 is smaller than the cross-sectional length of the first (second) inorganic layer, and the second inorganic layer Layer 83 encapsulates the organic layer 82 .

The materials of the first inorganic layer 81 and the second inorganic layer 83 are respectively _{at least one of SiN x} , SiO _x and Al ₂ O ₃ , and the materials of the organic layer 82 are polymethyl methacrylate and At least one of hexamethyldisilazane. The thicknesses of the first inorganic layer 81 and the second inorganic layer 83 are respectively 0.5 μm˜1.5 μm, and the thicknesses of the organic layer 82 are 4.0 μm˜12.0 μm.

For example, the materials of the first inorganic layer 81 and the second inorganic layer 83 are both SiN _x , the thicknesses of the first inorganic layer 81 and the second inorganic layer 83 are both 0.8 μm; the organic layer The material of 82 is polymethyl methacrylate, and the thickness of the organic layer 82 is 10.0 microns.

It should be noted that the display panel also includes a color filter layer, a touch layer, a polarizer, a protective cover plate and other common structures in existing OLED display panels, which can be set according to actual needs.

For example, the display panel further includes a touch layer, a polarizer and a protective cover, the touch layer is stacked on the encapsulation layer, and the polarizer is stacked on the touch layer, The protective cover plate is stacked on the polarizer, and the protective cover plate and the substrate are disposed opposite to each other.

For example, the display panel further includes a color filter layer, the color filter layer is disposed on the encapsulation layer, the color filter layer includes a plurality of color filter layers corresponding to each of the sub-pixel units, and For the light-shielding layers disposed at the gaps between the adjacent color filter layers, the color filter layers corresponding to their colors are disposed above the sub-pixel units of different colors.

In a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, which is used to prepare the display panel described in the first aspect. As shown in FIG. 5 , the method includes the following steps:

S1. Provide a substrate on which a plurality of sub-pixel regions are predefined, and the plurality of sub-pixel regions include blue sub-pixel regions.

In some embodiments, the substrate includes a base substrate and a TFT array layer stacked in layers, that is, the corresponding display panel is an active matrix OLED (Active Matrix OLED). Matrix OLED, AMOLED) display panel. The TFT array layer is prepared by using a deposited film combined with a photolithography process or an electronic printing process. The deposited film combined with the photolithography process and the electronic printing process are conventional technical means in the art, and will not be repeated here.

S2. Prepare and form a patterned first electrode layer on the substrate, the first electrode layer includes a plurality of first electrodes distributed in an array, and an opening area is formed between adjacent first electrodes.

Specifically, a patterned first electrode layer is formed on the substrate by depositing a thin film combined with a photolithography process or an electronic printing process.

S3. Prepare and form a blue light compensation pattern in each of the opening regions adjacent to the predefined blue sub-pixel region. The blue light compensation pattern is used to absorb light with a wavelength greater than that of blue light and convert it into blue light .

Specifically, a blue light compensation pattern is respectively prepared and formed in each of the opening regions adjacent to the predefined blue sub-pixel regions through an evaporation process using FMM.

S4. Prepare and form a patterned pixel definition layer on the substrate. The pixel definition layer includes a plurality of bank portions distributed in an array. Each bank portion covers each of the opening regions, and each adjacent bank The gap region between the parts is defined as a sub-pixel region, and the bottom of each sub-pixel region is a first electrode.

Specifically, a patterned pixel defining layer is formed on the substrate by depositing a thin film combined with a photolithography process or an electronic printing process.

In some embodiments, a spacer is formed on each of the banks by depositing a thin film combined with a photolithography process or an electronic printing process.

S5. Prepare and form a sub-pixel unit in each of the sub-pixel regions, and connect the blue sub-pixel units in the blue sub-pixel region with each of the adjacent blue light compensation patterns.

In some embodiments, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron layer are sequentially formed by vapor deposition on the first electrodes of each of the sub-pixel regions by means of an FMM evaporation process. injection layer.

In some embodiments, an electronic printing process is used to print a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer sequentially on the first electrode of each of the sub-pixel regions.

In addition, a sub-pixel unit may also be formed in each of the sub-pixel regions by using a solution film-forming method, which is a conventional technical means in the art, and will not be repeated here.

S6, preparing and forming a second electrode layer on each of the sub-pixel units.

Specifically, a second electrode layer is formed on each of the sub-pixel units by an evaporation process or an electronic printing process.

In some embodiments, an entire second electrode layer is formed on each of the sub-pixel units and each of the spacers through an evaporation process using an open mask.

In some embodiments, the preparation method of the display panel further comprises the steps of:

S7, preparing and forming an encapsulation layer on the second electrode layer.

In some embodiments, a chemical vapor deposition process or an electronic printing process is used to form an encapsulation layer on the second electrode layer, and the electronic printing process is preferably an inkjet printing process.

In some embodiments, the encapsulation layer includes a first inorganic layer, an organic layer and a second inorganic layer that are stacked in sequence, and the materials of the first inorganic layer and the second inorganic layer are SiN _{x respectively} , _{at least one of SiO x} and Al ₂ O ₃ , and the material of the organic layer is at least one of polymethyl methacrylate and hexamethyldisiloxane. Correspondingly, a first inorganic layer, an organic layer and a second inorganic layer are sequentially formed on the second electrode layer by chemical vapor deposition process or electronic printing process.

It should be noted that the display panel may also include a color filter layer, a touch layer, a polarizer, a protective cover plate and other structures commonly found in existing OLED display panels, and the corresponding conventional technical means in the art are used to prepare the color filter layer. , touch layer, polarizer, protective cover, etc.

In a third aspect, an embodiment of the present invention provides a display device including the display panel described in the first aspect.

Specifically, the display device can be a mobile phone, a computer, a digital camera, a digital video camera, a game console, an audio reproduction device, an information terminal, an intelligent wearable device, an intelligent electronic weighing scale, a vehicle-mounted display, a television, etc. The product or component, wherein the smart wearable device can be a smart bracelet, smart watch, smart glasses, etc.

The present invention has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the invention. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are intended to be included within the scope of the invention.

Claims

A display panel, comprising:

a substrate, the substrate is divided into a plurality of sub-pixel regions, and the plurality of sub-pixel regions include blue sub-pixel regions;

a first electrode layer, disposed on the substrate, including a plurality of first electrodes distributed in an array, with an opening area between adjacent first electrodes;

a plurality of blue light compensation patterns, respectively disposed in each of the opening regions adjacent to the blue sub-pixel region, and the blue light compensation patterns are used for absorbing light with a wavelength greater than that of blue light and converting it into blue light;

A pixel definition layer, disposed on the substrate, includes a plurality of bank portions distributed in an array to define each of the sub-pixel regions, each of the bank portions respectively covers each of the opening regions, and the adjacent bank portions are separated from each other. The gap area between them is defined as a sub-pixel area, and the bottom of each sub-pixel area is a first electrode;

A plurality of sub-pixel units are respectively arranged in each of the sub-pixel areas, the sub-pixel units in the blue sub-pixel area are blue sub-pixel units, and the blue sub-pixel units are adjacent to each of the blue light compensation pattern connections; and

A second electrode layer is disposed on each of the sub-pixel units.
The display panel according to claim 1, wherein the material of the blue compensation pattern is a host material doped with rare earth ions, and the host material is halide, oxide, oxyhalide, sulfur-containing compound and sulfur At least one of oxides, and the rare earth ion is at least one of Er 3+ , Tm 3+ , Dy 3+ , Ho 3+ , Eu 3+ and Tb 3+ .
The display panel according to claim 2, wherein the material of the blue compensation pattern is yttrium sodium tetrafluoro doped with Er 3+.
The display panel according to claim 1, wherein each of the blue light compensation patterns is respectively attached to the edge of the first electrode at the bottom of the adjacent blue sub-pixel unit; or, each of the blue light compensation patterns is respectively Conduction with the adjacent blue sub-pixel units.
The display panel according to claim 1, wherein the display panel further comprises: an encapsulation layer disposed on the second electrode layer.
The display panel according to claim 5, wherein the encapsulation layer comprises: a first inorganic layer, an organic layer and a second inorganic layer which are stacked in sequence, the first inorganic layer and the second inorganic layer The materials of the layers are respectively at least one of silicon nitride, silicon oxide and aluminum oxide, and the materials of the organic layers are at least one of polymethyl methacrylate and hexamethyldisilazane.
The display panel according to claim 6, wherein the thickness of the first inorganic layer is 0.5 μm˜1.5 μm, the thickness of the second inorganic layer is 0.5 μm˜1.5 μm, and the thickness of the organic layer is 4.0 μm microns ~ 12.0 microns.
The display panel of claim 1, wherein the substrate comprises: a base substrate, and the base substrate is a rigid substrate or a flexible substrate.
The display panel according to claim 8, wherein the substrate further comprises: a thin film transistor array layer stacked on the base substrate.
The display panel of claim 1, wherein the first electrode layer is an anode layer, and the second electrode layer is a cathode layer.
The display panel according to claim 1, wherein the display panel further comprises a plurality of spacers distributed in an array, and each of the spacers is respectively disposed on each of the embankments.
The display panel of claim 11, wherein a width of the spacer is not greater than a width of the bank.
The display panel according to claim 1, wherein each of the sub-pixel units comprises a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer which are stacked in sequence.
A preparation method of a display panel, comprising the following steps:

providing a substrate on which a plurality of sub-pixel regions are predefined, the plurality of sub-pixel regions including blue sub-pixel regions;

A patterned first electrode layer is prepared on the substrate, the first electrode layer includes a plurality of first electrodes distributed in an array, and an opening area is formed between adjacent first electrodes;

In each of the opening regions adjacent to the predefined blue sub-pixel regions, a blue light compensation pattern is prepared and formed respectively, and the blue light compensation pattern is used for absorbing light with a wavelength greater than that of the blue light and converting it into blue light;

A patterned pixel definition layer is formed on the substrate, the pixel definition layer includes a plurality of bank portions distributed in an array, each bank portion covers each of the opening regions, and the adjacent bank portions are separated The gap area between them is defined as a sub-pixel area, and the bottom of each sub-pixel area is a first electrode;

A sub-pixel unit is prepared and formed in each of the sub-pixel regions, and the blue sub-pixel unit in the blue sub-pixel region is connected to each of the adjacent blue light compensation patterns; and

A second electrode layer is prepared and formed on each of the sub-pixel units.
The method for manufacturing a display panel according to claim 14, further comprising the step of: forming an encapsulation layer on the second electrode layer.
The method for manufacturing a display panel according to claim 15, wherein the forming an encapsulation layer on the second electrode layer comprises the steps of: forming a first inorganic layer on the second electrode layer in sequence, an organic layer and a second inorganic layer, the materials of the first inorganic layer and the second inorganic layer are respectively at least one of silicon nitride, silicon oxide and aluminum oxide, the material of the organic layer is poly At least one of methyl methacrylate and hexamethyldisiloxane.
The manufacturing method of the display panel according to claim 14, wherein the providing a substrate is to provide a thin film transistor array substrate.
The method for manufacturing a display panel according to claim 14, wherein the forming a sub-pixel unit in each of the sub-pixel regions is to sequentially prepare and form a hole injection layer and a hole in each of the sub-pixel regions. transport layer, a light emitting layer, an electron transport layer and an electron injection layer.
A display device, comprising a display panel, the display panel comprising:

a substrate, the substrate is divided into a plurality of sub-pixel regions, and the plurality of sub-pixel regions include blue sub-pixel regions;

a first electrode layer, disposed on the substrate, including a plurality of first electrodes distributed in an array, with an opening area between adjacent first electrodes;

a plurality of blue light compensation patterns, respectively disposed in each of the opening regions adjacent to the blue sub-pixel region, and the blue light compensation patterns are used for absorbing light with a wavelength greater than that of blue light and converting it into blue light;

A pixel definition layer, disposed on the substrate, includes a plurality of bank portions distributed in an array to define each of the sub-pixel regions, each of the bank portions respectively covers each of the opening regions, and the adjacent bank portions are separated from each other. The gap area between them is defined as a sub-pixel area, and the bottom of each sub-pixel area is a first electrode;

A plurality of sub-pixel units are respectively arranged in each of the sub-pixel areas, the sub-pixel units in the blue sub-pixel area are blue sub-pixel units, and the blue sub-pixel units are adjacent to each of the blue light compensation pattern connections; and

A second electrode layer is disposed on each of the sub-pixel units.
The display device according to claim 19, wherein each of the blue light compensation patterns is respectively attached to the edge of the first electrode at the bottom of the adjacent blue sub-pixel unit; or, each of the blue light compensation patterns is respectively Conduction with the adjacent blue sub-pixel units.