CN113178532A - Display panel and preparation method thereof - Google Patents

Display panel and preparation method thereof Download PDF

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Publication number
CN113178532A
CN113178532A CN202110389302.2A CN202110389302A CN113178532A CN 113178532 A CN113178532 A CN 113178532A CN 202110389302 A CN202110389302 A CN 202110389302A CN 113178532 A CN113178532 A CN 113178532A
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layer
light emitting
light
display panel
refractive index
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孙佳佳
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN202110389302.2A priority Critical patent/CN113178532A/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application provides a display panel and a preparation method of the display panel. The light emitting units with different colors have different refractive indexes of the anti-reflection layers in the corresponding areas, and when light rays with different colors penetrate through the corresponding anti-reflection layers with different refractive indexes, the light emitting rate can be higher, so that the light emitting rate of the display panel is effectively improved, and the display effect of the panel is improved.

Description

Display panel and preparation method thereof
Technical Field
The present disclosure relates to the field of display panel manufacturing technologies, and in particular, to a display panel and a manufacturing method of the display panel.
Background
With the continuous improvement of display technology, people have made higher requirements on the performance and quality of display panels and display devices.
Compared with a conventional Liquid Crystal Display (LCD), an organic light-emitting diode (OLED) device has the advantages of light weight, wide viewing angle, fast response time, low temperature resistance, high light-emitting efficiency and the like. Therefore, the OLED display panel is always considered as a next generation of novel display technology in the display industry, and particularly, the OLED display panel can be made into a flexible display screen capable of being bent on a flexible substrate, which is a great advantage of the OLED display panel. However, the light transmittance and light extraction rate of the conventional OLED device are not ideal, and the light extraction efficiency of the device is affected. In order to solve the above technical problems, in the existing OLED device, the purpose of improving the light emitting efficiency is often achieved by arranging a plurality of anti-reflection layers inside the device, a commonly used enhancement film layer includes a lithium fluoride (LiF) layer, the light emitting coupling layer of the display panel is protected by LiF, and the light emitting efficiency of the OLED panel is improved together with the light emitting coupling layer.
In summary, the OLED device prepared in the prior art has a low light-emitting efficiency, and the LiF layer disposed inside the OLED device cannot make the light of different colors reach the optimal light-emitting efficiency, thereby affecting the display effect of the display panel.
Disclosure of Invention
The embodiment of the application provides a display panel and a preparation method of the display panel, so that the problems that an antireflection film layer arranged in the existing display panel is low in light-emitting rate and the display effect of the display panel is not ideal are effectively solved.
In order to solve the above technical problem, the technical method provided in the embodiment of the present application is as follows:
in a first aspect of embodiments of the present application, a display panel is provided, including:
an array substrate;
the light emitting layer is arranged on the array substrate, and a plurality of light emitting units are arranged on the light emitting layer in an array manner; and the number of the first and second groups,
the anti-reflection layer is arranged on the light emitting side of the light emitting layer;
and the refractive indexes of the anti-reflection layers in the areas corresponding to the light-emitting units with different colors are different.
According to an embodiment of the present application, the light emitting unit includes a red light emitting unit, a blue light emitting unit, and a green light emitting unit, the refractive index of the anti-reflection layer corresponding to the red light emitting unit is greater than the refractive index of the anti-reflection layer corresponding to the green light emitting unit, and the refractive index of the anti-reflection layer corresponding to the green light emitting unit is greater than the refractive index of the anti-reflection layer corresponding to the blue light emitting unit.
According to an embodiment of the present disclosure, a refractive index of the anti-reflection layer corresponding to the red light emitting unit is between 1.55 and 1.8, a refractive index of the anti-reflection layer corresponding to the green light emitting unit is between 1.3 and 1.52, and a refractive index of the anti-reflection layer corresponding to the blue light emitting unit is between 1.1 and 1.28.
According to an embodiment of the application, the anti-reflection layer is an inorganic film layer, and the anti-reflection layer is prepared through a chemical vapor deposition process.
According to an embodiment of the present application, the anti-reflection layer is a lithium fluoride film layer.
According to an embodiment of the present application, the display panel further includes a light-emitting coupling layer, and the light-emitting coupling layer is disposed between the anti-reflection layer and the light-emitting layer.
According to an embodiment of the present application, the refractive index of the light extraction coupling layer is greater than the refractive index of the anti-reflection layer.
According to an embodiment of the present application, the refractive index of the light extraction coupling layer is between 1.9 and 2.1.
According to an embodiment of the present application, the material of the light extraction coupling layer includes SiN, SiON, SiO2Or Al2O3At least one or a combination thereof.
According to a second aspect of the embodiments of the present application, there is also provided a method for manufacturing a display panel, including the steps of:
providing a flexible substrate, and preparing an array substrate on the flexible substrate;
preparing an anode layer and a pixel definition layer on the array substrate, and carrying out patterning treatment on the pixel definition layer;
preparing a light emitting layer on the pixel defining layer, preparing a cathode on the light emitting layer, and preparing a light coupling layer on the cathode, wherein the light emitting layer comprises a plurality of light emitting areas arranged in an array;
and preparing an anti-reflection layer on the light-emitting coupling layer by a chemical vapor deposition process, wherein the anti-reflection layer has different refractive indexes in the light-emitting areas corresponding to different light-emitting colors.
To sum up, the beneficial effect of this application embodiment is:
the embodiment of the application provides a display panel and a preparation method of the display panel. In order to effectively improve the light-emitting rate of the light of the display panel, in the embodiment of the application, the anti-reflection layer is arranged on the light-emitting layer, wherein when the anti-reflection layer is arranged, different refractive indexes are arranged in the light-emitting areas corresponding to different colors of the anti-reflection layer, so that the optimal light-emitting effect can be achieved when different light is arranged on the light-transmitting anti-reflection layer, and the purposes of improving the light-emitting rate and the display effect of the display panel are finally achieved. In addition, in the embodiment of the application, when the anti-reflection layer is arranged, the anti-reflection layer is arranged through a chemical vapor deposition process, so that the performance of the film layer is improved.
Drawings
The technical solutions and other advantages of the present application will become more apparent from the detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic light transmission diagram according to an embodiment of the present disclosure;
FIG. 3 is a graph showing the variation of the refractive index of the film layer and the intensity of light after passing through the color resists of different colors in the embodiment of the present application;
fig. 4 is a schematic diagram of a pixel arrangement of a display panel provided in an embodiment of the present application;
fig. 5 is a schematic diagram of a film structure of a display panel according to an embodiment of the present invention;
fig. 6 is a flowchart of a manufacturing process of a display panel according to an embodiment of the present disclosure;
fig. 7A to 7C are film layer structure diagrams corresponding to a manufacturing process of a display panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. 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 application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
With the development of display panel manufacturing technology, people want to obtain a display panel and a display device with better light emitting performance and display effect. However, the light-emitting efficiency and the display quality of the conventional display panel have certain problems, which are not beneficial to improving the comprehensive performance of the display panel.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application. The display panel includes a substrate 100, an array substrate 101, an anode 102, a pixel defining layer 103, a light emitting layer 106, and a cathode 107.
Specifically, an array substrate 101 is disposed on a substrate 100, an anode 102 is disposed on the array substrate 101, a pixel defining layer 103 is disposed on the array substrate 101, and the pixel defining layer 103 covers the anode 102.
In this case, patterning process is performed on the pixel defining layer 103, and finally the pixel defining layer 103 forms an opening region 11 and a non-opening region 12. The open region 11 and the non-open region 12 are disposed adjacent to each other, and light passes through the open region 11 and is emitted to the outside of the display panel.
In the embodiment of the application, when the light emitting layer 106 is disposed, the light emitting layer 106 is correspondingly disposed in the opening region 11 of the pixel defining layer 103 and electrically connected to the anode 102 in the opening region 11, so that the light emitting layer 106 is controlled by the anode 102. Thus, the light emitting layer 106 forms a plurality of light emitting units 61, such as the first light emitting unit 611, the second light emitting unit 612, and the third light emitting unit 613, arranged in an array on the pixel defining layer 103. The first light emitting unit 611, the second light emitting unit 612 and the third light emitting unit 613 are respectively disposed in different opening regions 11, and when the display panel emits light, the light emitting layers 106 in the plurality of light emitting units 61 emit light to form a plurality of light emitting units such as a plurality of light emitting sub-pixels, and finally, the light emitting display function of the display panel is realized.
The more light emitted from the light emitting layer 106 can be emitted to the outside of the display panel, the higher the display effect of the display panel. However, when light passes through different films, the films absorb and scatter a part of light, and finally only a part of light can penetrate the display screen and be received by a user, so that the display performance of the display panel is reduced.
Wherein the cathode 107 is disposed on the pixel defining layer 103 and covers the light emitting layer 106. So that the anode 102, the light-emitting layer 106 and the cathode 107 form a complete light-emitting structure. Through the anode 102 and the cathode 107 to drive the light emitting function of the light emitting layer 106. In the embodiment of the present application, the cathode 107 may be a planar cathode or a cathode with other structure.
Preferably, in order to improve the light extraction rate of the display panel, an extraction coupling layer 108 and an anti-reflection layer 109 are further disposed in the embodiment of the present application.
Specifically, the light-out coupling layer 108 is disposed on the cathode 107, and when the light-out coupling layer is disposed, the light-out coupling layer 108 may be disposed in a region corresponding to each light-emitting unit. Or the outcoupling layer 108 may be disposed directly on the cathode 107.
The anti-reflection layer 109 is disposed on the light-out coupling layer 108, and preferably, the anti-reflection layer 109 is disposed on the light-out coupling layer 108 in the corresponding region of each light-emitting unit.
The light emitted from the light emitting layer 106 in the opening region 11 sequentially passes through the light-emitting cathode 107, the light-emitting coupling layer 108 and the anti-reflection layer 109, and is combined by the light-emitting coupling layer 108 and the anti-reflection layer 109, so that the light-emitting rate is effectively improved.
In the embodiment of the present application, the first light-emitting unit 611, the second light-emitting unit 612, and the third light-emitting unit 613 are respectively illustrated by taking the red sub-pixel 611, the green sub-pixel 612, and the blue sub-pixel 613 as examples, wherein the light-emitting unit 61 may also be a light-emitting unit of another color, and details thereof are not described herein.
As shown in fig. 2, fig. 2 is a schematic light transmission diagram according to an embodiment of the present disclosure. In the embodiment of the present application, three light emitting units are taken as an example for explanation, and each light emitting unit is correspondingly provided with a red sub-pixel 611, a green sub-pixel 612, and a blue sub-pixel 613. After light passes through the color resistors with different colors, the transmittance of the color resistor layer to the light is different, so the light emergence rate is also different. According to the characteristics, in the embodiment of the application, the refractive indexes of the corresponding film layers in the light emitting units with different colors are respectively improved, so that the optimal light emergence rate can be achieved when light passes through the color resistance film layers with different colors, and the display effect of the display panel is improved.
Specifically, as shown in fig. 3, fig. 3 is a graph illustrating a variation of light intensity and a refractive index of a film layer after light passes through color resists of different colors in the embodiment of the present application. The curve can be obtained through light simulation or experimental verification, and the corresponding data are shown as marked points in the graph. Fig. 3, a, b and c respectively correspond to graphs of the variation of the light intensity after the light passes through the red, green and blue layers and the refractive index of the layers. It can be known that when light passes through the red film layer, the transmittance of light gradually increases with the gradual increase of the refractive index of the red film layer, the light intensity reaching the outside gradually increases, and when the light intensity increases to a maximum value, the transmittance of light decreases, when the refractive index n of the film layer is equal to 1, the transmitted light intensity is 18, and when the refractive index n of the film layer is equal to 1.6, the transmitted light intensity is 22 at most; when light passes through the green film layer, the transmittance of the light gradually increases along with the gradual increase of the refractive index of the green film layer, and then the transmittance of the light decreases along with the gradual increase of the refractive index of the green film layer to a maximum value, when the refractive index n of the green film layer is equal to 1, the maximum light intensity is 160, and when the refractive index n of the green film layer is equal to 1.4, the maximum light intensity is 170; similarly, it is known that when light passes through the blue film, the transmittance of light gradually increases as the refractive index of the blue film gradually increases, and then decreases when the refractive index of the blue film increases to a maximum value, and when the refractive index n of the blue film is equal to 1, the maximum light intensity is 108, and when the refractive index n of the blue film is equal to 1.2, the maximum light intensity is 112.
Therefore, when light propagates through the red film layer, the green film layer and the blue film layer, the optimal refractive index values of the different film layers corresponding to the maximum value of the light emergence rate are obtained according to the relationship of the variation curves, and the refractive index values are respectively and correspondingly arranged on the anti-reflection layers 109 in the different areas.
Specifically, in the embodiment of the present application, the refractive index of the anti-reflection layer in the region corresponding to the red light-emitting unit is greater than the refractive index of the anti-reflection layer in the region corresponding to the green light-emitting unit, and the refractive index of the anti-reflection layer corresponding to the green light-emitting unit is greater than the refractive index of the anti-reflection layer corresponding to the blue light-emitting unit, so that the optimal emission rate can be effectively ensured when light passes through the color resistance film layers with different colors.
Preferably, for the corresponding anti-reflection layer 109 in the red sub-pixel 611 region, the refractive index n of the anti-reflection layer 109 in this region1The refractive index n of the anti-reflection layer 109 arranged between 1.55 and 1.8 is preferably in the region11.6. In this interval, when the red light passes through the anti-reflection layer 109, the light can reach the optimal emission rate.
For the corresponding anti-reflection layer 109 in the green sub-pixel 612 region, the refractive index n of the anti-reflection layer 109 in this region2The refractive index n of the anti-reflection layer 109 arranged between 1.3 and 1.52 is preferably in the region21.4. In this interval, when the green light passes through the anti-reflection layer 109, the light can also reach the optimal emission rate.
For a corresponding anti-reflection layer 109 in the region of blue subpixel 613, the refractive index n of anti-reflection layer 109 in that region3The refractive index n of the anti-reflection layer 109 arranged between 1.1 and 1.28, preferably in the region31.2. In this interval, when the blue light passes through the anti-reflection layer 109, the light can also reach the optimal output rate.
Further, in order to better improve the light emergence rate, when the light-exiting coupling layer 108 is disposed, the refractive index of the light-exiting coupling layer 108 is greater than that of the film layer of the anti-reflection layer 109. Preferably, the refractive index of the coupling layer can be set between 1.9 and 2.1, and when the anti-reflection layer 109 is provided, the coupling layer can be only provided at the corresponding position of the light-emitting region, or the whole surface of the coupling layer can completely cover the light-emitting coupling layer 108.
Therefore, the light-emitting coupling layer 108 and the anti-reflection layer 109 can act together, and the light emitted by the light-emitting units with different colors can reach the optimal light-emitting rate after passing through the film layers, thereby effectively improving the display effect of the display panel.
In the embodiment of the present invention, when the anti-reflection layer 109 is prepared, a chemical vapor deposition process is performed, and parameters in a chemical vapor deposition process are adjusted and a fine mask is used, so that the anti-reflection layer 109 with the optimal refractive index is finally deposited on the red, green, and blue pixels. It is composed ofIn one embodiment, the anti-reflection layer 109 may be an inorganic thin film layer including, but not limited to, SiN, SiONx，SiOx，Al2O3And the like.
Further, the anti-reflection layer 109 provided in the embodiment of the invention may be a LiF film layer, or a transparent film layer made of other materials.
The display panel in the embodiment of the invention further includes an encapsulation layer 110, where the encapsulation layer 110 is disposed on the anti-reflection layer 109 and seals the anti-reflection layer 109. The packaging layer 110 may be configured as a multi-film structure stacked by inorganic and organic layers, so as to improve the packaging performance and reliability of the display panel.
In the array substrate 101 provided in the embodiment of the present disclosure, a plurality of thin film transistors 3 are disposed in the array substrate 101, each thin film transistor 3 includes a gate 32, a source 31, and a drain 33, and the structures of the thin film transistors 3 are all normal structure type thin film transistors, which are not described in detail. Meanwhile, the anode 102 is electrically connected to the drain 33 of the thin film transistor 3 through a corresponding via hole, so as to drive and control the light emitting layer 106.
As shown in fig. 4, fig. 4 is a schematic diagram of a pixel arrangement of a display panel provided in the embodiment of the present application. The light emitting region of the display panel includes a plurality of pixel units 400, and each pixel unit 400 further includes a plurality of sub-pixels, in the embodiment of the present application, a blue sub-pixel 401, a red sub-pixel 402, and a green sub-pixel 403 are taken as an example for description.
A plurality of pixel units 400 are arranged in an array in a light emitting region of the display panel. The area of the pixel unit corresponding to the blue sub-pixel 401 is larger than that of the pixel unit corresponding to the red sub-pixel 402, and the area of the pixel unit corresponding to the red sub-pixel 402 is larger than that of the pixel unit corresponding to the green sub-pixel 403. Meanwhile, the red sub-pixel 402 and the green sub-pixel 403 are disposed on one side of the blue sub-pixel 401, the red sub-pixel 402 and the green sub-pixel 403 are disposed on the same column, and three sub-pixels of different colors form a rectangular structure.
Correspondingly, the anti-reflection layers with different refractive indexes are arranged in the corresponding areas of the sub-pixels with different colors, so that the light-emitting rate of the display panel is effectively improved, and the light-emitting effect of the display panel is improved.
As shown in fig. 5, fig. 5 is a schematic view of a film structure of a display panel provided in an embodiment of the present invention. The display panel includes an anode 500, a first functional layer 501, a light-emitting layer 502, a second functional layer 503, and a cathode 504, which are sequentially disposed from bottom to top.
The light-emitting layer 502 includes light-emitting regions of different colors, such as red, blue, and green regions. In the embodiment of the present application, in order to improve the light emitting efficiency of different colors of the light emitting layer, an optical coupling layer 505 and an anti-reflection layer 506 are further disposed on the cathode 504, wherein the anti-reflection layer 506 is disposed on the optical coupling layer 505. Preferably, when antireflection layer 506 is provided, the refractive index of antireflection layer 506 is different in different color regions. The refractive index of anti-reflection layer 506 corresponding to the red light emitting region is greater than the refractive index of anti-reflection layer 506 corresponding to the green light emitting region, and the refractive index of anti-reflection layer 506 corresponding to the green light emitting region is greater than the refractive index of anti-reflection layer 506 corresponding to the blue light emitting region. And the refractive index of the light-emitting coupling layer 505 is ensured to be larger than that of the anti-reflection layer 506, so that the emergent light reaches the maximum through the combined action of the light-emitting coupling layer 505 and the anti-reflection layer 506, and the display effect of the display panel is effectively improved.
Further, as shown in fig. 6, fig. 6 is a flowchart of a manufacturing process of the display panel according to the embodiment of the present application. The preparation process of the display panel comprises the following steps:
b100: providing a flexible substrate, and preparing an array substrate on the flexible substrate;
b101: preparing an anode layer and a pixel definition layer on the array substrate, and carrying out patterning treatment on the pixel definition layer;
referring to fig. 7A to 7C, fig. 7A to 7C are schematic diagrams of film layers corresponding to a manufacturing process of a display panel according to an embodiment of the present disclosure. As shown in fig. 7A, a substrate 100 is provided, and the substrate 100 may be a flexible substrate, while an array substrate 101 is prepared on the substrate 100. The array substrate 101 in the embodiment of the present application is a thin film transistor array substrate, a plurality of thin film transistors 3 are disposed in the array substrate 101, each thin film transistor 3 includes a source electrode 31, a gate electrode 32, a drain electrode 33, an active layer, and a dielectric layer between layers, and the structure of the thin film transistor 3 is the same as that of the existing thin film transistor, and therefore, the specific structure of each layer is not shown in detail.
After the array substrate 101 is arranged, the array substrate 101 is etched, a via structure is formed in a region corresponding to the drain electrode 33 of the different thin film transistor 3, and the anode 102 is arranged in the via structure. And a pixel defining layer 103 is disposed on the array substrate 101.
After the pixel defining layer 103 is prepared, the pixel defining layer 103 is patterned, and a plurality of opening regions 11 are formed.
B102: preparing a light emitting layer on the pixel defining layer, preparing a cathode on the light emitting layer, and preparing a light coupling layer on the cathode, wherein the light emitting layer comprises a plurality of light emitting areas arranged in an array;
b103: and preparing an anti-reflection layer on the light-emitting coupling layer by a chemical vapor deposition process, wherein the anti-reflection layer has different refractive indexes in the light-emitting areas corresponding to different light-emitting colors.
As shown in fig. 7B in detail, after the pixel defining layer 103 is prepared, the light emitting layers 106 are prepared on the corresponding film layers in the opening region 11, and when the light emitting layers 106 are prepared, the light emitting layers 106 with different colors are disposed in different opening regions 11, so as to achieve the display effect with different colors.
Further, a cathode 107 is provided on the light emitting layer 106, and the cathode 107 may be a plane cathode layer while covering the light emitting layer 106 and the pixel defining layer 103.
After the cathode 107 is disposed, the outcoupling layer 108 is disposed on the cathode 107, and the outcoupling layer 108 may cover the pixel defining layer 103.
After the light-out coupling layer 108 is prepared, the antireflection layer 109 is continuously prepared, wherein the antireflection layer 109 can be correspondingly arranged in the opening regions 11 with different colors, and the refractive indexes of the antireflection layer 109 are different in the opening regions 11 with different colors. Specifically, the refractive index of the anti-reflection layer 109 corresponding to the red light emitting region is between 1.55 and 1.8, the refractive index of the anti-reflection layer 109 corresponding to the green light emitting region is between 1.3 and 1.52, and the refractive index of the anti-reflection layer 109 corresponding to the blue light emitting region is between 1.1 and 1.28.
Therefore, when different light rays pass through the anti-reflection layer 109, the film layer in the present application can effectively improve the light ray emergence rate because the refractive indexes of the anti-reflection layers 109 corresponding to the light rays with different colors are different, and the maximum light ray emergence rate can be achieved when the light rays pass through.
Further, the refractive index of the light out-coupling layer 108 in the present application is greater than the refractive index of the anti-reflection layer 109.
Meanwhile, in the preparation of the antireflection layer 109 in the present application, the preparation is performed by a chemical vapor deposition process. The proportion of reaction gas or the reaction condition in the preparation process is adjusted to avoid the loss of other film layers in the preparation process.
The production cost of the product is effectively reduced through the chemical vapor deposition process, and the preparation process is more stable in the preparation process, thereby being beneficial to the production of mass products.
The anti-reflection layer in the embodiment of the application can be a LiF film layer, or other inorganic films are adopted to replace the LiF layer, so that the emergent rate of light rays is effectively increased.
After the anti-reflection layer 109 is prepared, as shown in fig. 7C, an encapsulation layer 110 is further prepared on the anti-reflection layer 109, and the display panel is sealed.
Further, the embodiment of the application also provides a display device. The display device includes the display panel provided in the present application. The display panel is internally provided with the anti-reflection layers with different refractive indexes in the light emitting areas with different colors, so that different rays can reach the optimal emergence rate when passing through the anti-reflection layers. And finally the purpose of improving the display effect of the display device is achieved.
The display panel and the method for manufacturing the display panel provided by the embodiment of the present application are described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understand the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A display panel, comprising:
an array substrate;
the light emitting layer is arranged on the array substrate, and a plurality of light emitting units are arranged on the light emitting layer in an array manner; and the number of the first and second groups,
the anti-reflection layer is arranged on the light emitting side of the light emitting layer;
and the refractive indexes of the anti-reflection layers in the areas corresponding to the light-emitting units with different colors are different.
2. The display panel according to claim 1, wherein the light emitting units comprise a red light emitting unit, a blue light emitting unit and a green light emitting unit, a refractive index of the anti-reflection layer corresponding to the red light emitting unit is greater than a refractive index of the anti-reflection layer corresponding to the green light emitting unit, and a refractive index of the anti-reflection layer corresponding to the green light emitting unit is greater than a refractive index of the anti-reflection layer corresponding to the blue light emitting unit.
3. The display panel according to claim 2, wherein the refractive index of the anti-reflection layer corresponding to the red light emitting unit is 1.55-1.8, the refractive index of the anti-reflection layer corresponding to the green light emitting unit is 1.3-1.52, and the refractive index of the anti-reflection layer corresponding to the blue light emitting unit is 1.1-1.28.
4. The display panel according to claim 1, wherein the anti-reflection layer is an inorganic film layer and is obtained by a chemical vapor deposition process.
5. The display panel according to claim 4, wherein the antireflection layer is a lithium fluoride film layer.
6. The display panel of claim 1, further comprising an out-coupling layer disposed between the anti-reflection layer and the light-emitting layer.
7. The display panel of claim 6, wherein the refractive index of the light out-coupling layer is greater than the refractive index of the anti-reflection layer.
8. The display panel of claim 7, wherein the refractive index of the light extraction coupling layer is between 1.9 and 2.1.
9. The display panel according to claim 7, wherein the material of the light outcoupling layer comprises SiN or SiONx、SiO2Or Al2O3At least one or a combination thereof.
10. A preparation method of a display panel is characterized by comprising the following steps:
providing a flexible substrate, and preparing an array substrate on the flexible substrate;
preparing an anode layer and a pixel definition layer on the array substrate, and carrying out patterning treatment on the pixel definition layer;
preparing a light emitting layer on the pixel defining layer, preparing a cathode on the light emitting layer, and preparing a light coupling layer on the cathode, wherein the light emitting layer comprises a plurality of light emitting areas arranged in an array;
and preparing an anti-reflection layer on the light-emitting coupling layer by a chemical vapor deposition process, wherein the anti-reflection layer has different refractive indexes in the light-emitting areas corresponding to different light-emitting colors.
CN202110389302.2A 2021-04-12 2021-04-12 Display panel and preparation method thereof Pending CN113178532A (en)

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CN107425140A (en) * 2017-09-12 2017-12-01 武汉华星光电半导体显示技术有限公司 A kind of OLED structure
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CN209045557U (en) * 2018-09-29 2019-06-28 云谷（固安）科技有限公司 A kind of display panel and display device
CN110323354A (en) * 2019-04-25 2019-10-11 昆山工研院新型平板显示技术中心有限公司 Display panel and display device
CN112670328A (en) * 2020-12-21 2021-04-16 天马微电子股份有限公司 Display panel and display device

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US20180301656A1 (en) * 2016-01-06 2018-10-18 Boe Technology Group Co., Ltd. Organic light emitting diode display substrate and display device
CN106653806A (en) * 2016-11-30 2017-05-10 上海天马有机发光显示技术有限公司 Organic light-emitting display panel, manufacturing method thereof and electronic device
CN107425140A (en) * 2017-09-12 2017-12-01 武汉华星光电半导体显示技术有限公司 A kind of OLED structure
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Application publication date: 20210727