OLED display panel, preparation method thereof and OLED display device
阅读说明:本技术 Oled显示面板及其制备方法、oled显示装置 (OLED display panel, preparation method thereof and OLED display device ) 是由 程文锦 卜呈浩 于 2020-06-23 设计创作,主要内容包括:本申请公开了一种OLED显示面板及其制备方法、OLED显示装置。所述OLED显示面板的显示区域包括:至少一个功能附加区以及围绕功能附加区设置的正常显示区;在功能附加区,阳极层划分有多个透光区域、多个像素电极区域、以及围绕透光区域和像素电极区域设置的不透光区域;其中,在像素电极区域设置有图案化的阳极金属,在透光区域未设置阳极金属。通过在功能附加区内,对阳极层的阳极金属图案进行差异性设计,在保证功能附加区的显示功能正常的基础上,增加功能附加区的透光率。(The application discloses an OLED display panel, a preparation method thereof and an OLED display device. The display area of the OLED display panel includes: at least one function addition area and a normal display area disposed around the function addition area; in the function additional area, the anode layer is divided into a plurality of light-transmitting areas, a plurality of pixel electrode areas and a light-tight area which is arranged around the light-transmitting areas and the pixel electrode areas; the pixel electrode area is provided with patterned anode metal, and the light-transmitting area is not provided with the anode metal. By means of differential design of the anode metal patterns of the anode layer in the function additional area, light transmittance of the function additional area is increased on the basis that the display function of the function additional area is normal.)
1. An OLED display panel, comprising an anode layer; the OLED display panel is characterized in that a display area of the OLED display panel comprises: at least one function addition area and a normal display area arranged around the function addition area;
in the function addition area, the anode layer is divided into a plurality of light transmission areas, a plurality of pixel electrode areas and a light-tight area which is arranged around the light transmission areas and the pixel electrode areas, wherein the pixel electrode areas are provided with patterned anode metal, and the light transmission areas are not provided with the anode metal.
2. The OLED display panel of claim 1, wherein said anode layer is an ITO/Ag/ITO stack.
3. The OLED display panel of claim 1, wherein a plurality of the light-transmitting regions are arrayed in the function-added region.
4. The OLED display panel of claim 1, wherein the pattern shape of the light-transmitting area is any one of a circle, a rectangle, and a diamond.
5. The OLED display panel of claim 1, further comprising an array layer; in the function addition area, metal wires of the driving circuit, corresponding to the pixel electrode area, of the array layer are arranged in a concentrated mode, so that the light incoming area of external environment light of the function addition area is increased.
6. The OLED display panel of claim 5, wherein in the functional addition region, a projection of the patterned anode metal on the array layer at least partially overlaps with a metal trace of the driving circuit.
7. A preparation method of an OLED display panel is characterized by comprising the following steps:
providing a substrate base plate, wherein a display area of the substrate base plate is divided into: at least one function addition area and a normal display area arranged around the function addition area;
preparing an array layer on the substrate base plate;
growing ITO/Ag/ITO on the array layer to form an anode layer, and carrying out patterning treatment on the anode layer to form first patterned anode metal in a corresponding normal display area, and forming a plurality of light-transmitting areas, a plurality of pixel electrode areas and a light-tight area surrounding the light-transmitting areas and the pixel electrode areas in a corresponding function additional area, wherein second patterned anode metal is formed in the pixel electrode areas, and all metal of the anode layer in the light-transmitting areas is removed; and
a pixel defining layer and a supporting layer are formed on the anode layer.
8. The method of claim 7, wherein the step of preparing an array layer on the substrate base plate further comprises:
forming at least a patterned active layer, a gate insulating layer, a patterned gate metal layer and an interlayer insulating layer on the substrate;
forming a patterned source drain metal layer on the interlayer insulating layer;
forming an organic flat layer on the source drain metal layer;
the patterned active layer, the patterned gate metal layer and the patterned source drain metal layer of the driving circuit of the array layer are formed in the functional additional region and are arranged in a concentrated mode.
9. The method of claim 7, wherein the method further comprises:
evaporating a luminescent material in a pixel area defined by the pixel definition layer to form a plurality of luminescent units;
wherein the light emitting unit is formed at the anode metal corresponding to the second patterning in the function addition region.
10. An OLED display device, comprising:
an OLED display panel using the OLED display panel of any one of claims 1-6; and
at least one optical sensor, the optical sensor is arranged at the position corresponding to the function additional area of the OLED display panel.
Technical Field
The application relates to the technical field of display, in particular to an OLED display panel based on a CUP technology, a manufacturing method of the OLED display panel and an OLED display device.
Background
Since the concept of full screen of mobile phones, the industry has been working from top to bottom on realizing full screen in the true sense. Nowadays, the design of "full panel" is the mainstream, and full panel is a relatively broad definition of ultra-high-screen display device design in the display industry. The screen is used for displaying the image, and the display area is completely covered by the screen, the surrounding of the display area adopts a frameless design, and the ultrahigh screen ratio close to 100% is pursued.
In order to meet the requirements of the full-screen of the mobile phone, panel developers put more energy into the development of the Organic Light-Emitting Diode (OLED) display panel. The OLED display panel can adopt the flexible substrate as a substrate, the flexibility of the panel is realized, and the non-display area is bent towards the two sides or the back of the panel, so that the screen occupation ratio of the display area is increased as much as possible.
If a real comprehensive screen is to be achieved, functional components such as a receiver, a light sensor, a distance sensor, a front camera and the like need to be hidden. The first three have various solutions at present, and the most difficult problem to be solved is the problem of a front camera. From the date of birth of the concept of the comprehensive screen, the screen occupation ratio and the front camera are a pair of spear shields. The existing mobile phone screen needs to be provided with a certain gap above to arrange the functional components, and the mobile phone with the comprehensive screen declared in the industry cannot be used as a front screen of the mobile phone, which accounts for 100%. That is, the front of the mobile phone needs to have at least a part of the position for the front camera, so that the consumer cannot feel a full screen in the real sense.
Recently, a Camera Under Panel (CUP) technology based on an OLED display Panel is being paid attention by more and more mobile phone and Panel manufacturers. Due to the self-luminous characteristic of the OLED display panel, the structure of the screen is simpler. The thickness of the screen is thinner than that of a traditional Liquid Crystal Display (LCD), and the light transmittance of the screen is better, so that the camera can be hidden under the screen. Functional components such as a front camera, a light sensor and the like are placed below a CUP region corresponding to the OLED display panel; when the camera is not used, the CUP area can normally display pictures; when needs use the camera, external light can penetrate through the CUP region and jet into the formation of image in the camera of being convenient for.
However, the light transmittance of the screen of the OLED display panel is only about 40%, which is far from the level required by the camera. Therefore, how to improve the light transmittance of the screen of the OLED display panel, so that the camera under the screen can better collect light and perform algorithm reduction becomes an important point in the research of the CUP technology.
Disclosure of Invention
The application aims to provide the OLED display panel, the preparation method thereof and the OLED display device, so that the light transmittance of a screen of the OLED display panel can be improved, and a camera under the screen can well collect light and perform an algorithm.
To achieve the above object, the present application provides an OLED display panel including an anode layer; the display area of the OLED display panel includes: at least one function addition area and a normal display area arranged around the function addition area; in the function addition area, the anode layer is divided into a plurality of light transmission areas, a plurality of pixel electrode areas and a light-tight area which is arranged around the light transmission areas and the pixel electrode areas, wherein the pixel electrode areas are provided with patterned anode metal, and the light transmission areas are not provided with the anode metal.
In order to achieve the above object, the present application also provides a method for manufacturing an OLED display panel, including the steps of: providing a substrate base plate, wherein a display area of the substrate base plate is divided into: at least one function addition area and a normal display area arranged around the function addition area; preparing an array layer on the substrate base plate; growing ITO/Ag/ITO on the array layer to form an anode layer, and carrying out patterning treatment on the anode layer to form first patterned anode metal in a corresponding normal display area, and forming a plurality of light-transmitting areas, a plurality of pixel electrode areas and a light-tight area surrounding the light-transmitting areas and the pixel electrode areas in a corresponding function additional area, wherein second patterned anode metal is formed in the pixel electrode areas, and all metal of the anode layer in the light-transmitting areas is removed; and forming a pixel defining layer and a supporting layer on the anode layer.
To achieve the above object, the present application also provides an OLED display device including: the OLED display panel adopts the OLED display panel; and at least one optical sensor, wherein the optical sensor is arranged at the position corresponding to the function additional area of the OLED display panel.
The beneficial effect of this application does: according to the OLED display panel, the anode metal patterns of the anode layer are designed in the function additional area in a difference mode, and the light transmittance of the function additional area is increased on the basis that the display function of the function additional area is normal; through the light-transmitting area of formation array ization in the additional district of function, reduced the diffraction and the scattering of external environment light, and then will be easier when making to set up the optical sensor who adds the district in function and carrying out the algorithm reduction to external environment light. The driving circuits of the array layer are designed in a centralized manner in the function additional area, so that the light incoming area of external environment light is increased; the patterned anode metal corresponding to the light-emitting unit and the metal wiring part of the driving circuit are overlapped in the function addition area, so that the wiring density of the function addition area is reduced, the light transmittance of the OLED display panel in the function addition area is improved to the maximum extent, and a real full-screen is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a display panel for improving a screen ratio;
FIG. 2 is a schematic view of a layered structure of an OLED display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a first embodiment of an OLED display panel according to the present application;
FIG. 4 is a cross-sectional view of a second embodiment of an OLED display panel according to the present application;
FIG. 5 is a cross-sectional view of a third embodiment of an OLED display panel according to the present application;
fig. 6-9 are flow charts illustrating the fabrication of the OLED display panel according to the present invention;
fig. 10 is a schematic diagram of an OLED display device according to the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The terms "first," "second," "third," and the like in the description and in the claims of the present application, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. The directional phrases referred to in this application, for example: up, down, left, right, front, rear, inner, outer, lateral, etc., are simply directions with reference to the drawings.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be understood in a broad sense, e.g. they may be fixedly connected or integrally connected, or they may be electrically connected or may communicate with each other; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Please refer to fig. 1, a schematic structural diagram of a display panel for improving screen ratio.
As shown in part a of fig. 1, in order to make room for the front camera, the existing OLED screen after being manufactured is laser cut, and a U-shaped (or other shaped)
As shown in part b of fig. 1, in order to make room for the front camera, a
As shown in part c of fig. 1, in order to make room for the front camera and to actually hide the front camera below the screen, the scheme adopted by the front camera is as follows: the display panel is divided into an
Researches find that the directions for improving the light transmittance of the screen mainly include: a metal wiring material with better light transmittance is used; using a module material with better light transmittance; and optimally designing a driving circuit of a screen camera area and the like.
Fig. 2-5 are schematic diagrams showing a layered structure of an OLED display panel of the present application, fig. 3 is a cross-sectional view of the OLED display panel of the present application, fig. 4 is a cross-sectional view of a second embodiment of the OLED display panel of the present application, and fig. 5 is a cross-sectional view of a third embodiment of the OLED display panel of the present application.
As shown in fig. 2, the OLED display panel of the present application is based on the CUP technology, and the display area of the OLED display panel includes: at least one
As shown in fig. 3, in the
In a further embodiment, the
In a further embodiment, a plurality of the light-transmitting
In this embodiment, the pattern shape of the light-transmitting
By differentially designing the anode metal patterns of the
Referring to fig. 2, in the present embodiment, the
In the present embodiment, all the film layers constituting the driving circuit for driving the light-emitting
In this embodiment, the
Specifically, the light-emitting
In a further embodiment, in the
In a further embodiment, in the
According to the OLED display panel, the anode metal patterns of the anode layer are designed in the function additional area in a difference mode, and the light transmittance of the function additional area is increased on the basis that the display function of the function additional area is normal; through the light-transmitting area of formation array ization in the additional district of function, reduced the diffraction and the scattering of external environment light, and then will be easier when making to set up the optical sensor who adds the district in function and carrying out the algorithm reduction to external environment light. The driving circuits of the array layer are designed in a centralized manner in the function additional area, so that the light incoming area of external environment light is increased; the patterned anode metal corresponding to the light-emitting unit and the metal wiring part of the driving circuit are overlapped in the function addition area, so that the wiring density of the function addition area is reduced, the light transmittance of the OLED display panel in the function addition area is improved to the maximum extent, and a real full-screen is realized.
Based on the same inventive concept, the application also provides a preparation method of the OLED display panel.
Referring to fig. 6 to 9, a flow chart of a method for fabricating an OLED display panel according to the present application is shown. The preparation method of the OLED display panel comprises the following steps: s1, providing a substrate base plate; s2, preparing an array layer on the substrate base plate; s3, growing ITO/Ag/ITO on the array layer to form an anode layer, and patterning the anode layer; and S4, forming a pixel defining layer and a supporting layer on the anode layer.
With regard to the steps: s1, providing a substrate, please refer to fig. 6. As shown in fig. 6, the display area of the
With regard to the steps: s2, preparing an array layer on the substrate, please refer to fig. 7-8.
As shown in fig. 7, a patterned Active layer (Active layer)221 is formed by depositing an Active layer material on the
As shown in fig. 8, forming source/drain contact holes by performing exposure development on the
In the
With regard to the steps: s3, growing ITO/Ag/ITO on the array layer to form an anode layer, please refer to FIG. 9. As shown in fig. 9, an anode contact hole is formed by performing exposure development on the
The
In a further embodiment, in the
In a further embodiment, a plurality of the light-transmitting
With regard to the steps: s4, forming a pixel defining layer and a supporting layer on the anode layer, please refer to fig. 2. As shown in fig. 2, a Pixel Definition Layer (PDL)232 and a support layer (PS)233 are formed by applying an organic resist on the
And finishing the manufacture of the array substrate of the OLED display panel.
In a further embodiment, the method further comprises: performing evaporation of light-emitting materials in the pixel region defined by the
Based on the same inventive concept, the application also provides an OLED display device.
Referring to fig. 10, an architecture of the OLED display device of the present application is schematically illustrated. The OLED display device 100 includes an OLED display panel 1001 and at least one optical sensor 1002. The OLED display panel 1001 is the OLED display panel described above in this application; the optical sensor 1002 is disposed at a position corresponding to the function addition region 1011 of the OLED display panel 1001. The optical sensor 1002 may be one or more of a camera, an optical fingerprint sensor. The OLED display device can comprise a display module, a mobile terminal (such as a smart phone), a fixed terminal (such as a computer) and the like.
For example, the optical sensor 1002 is a camera, and when display is required, the function addition region 1011 and the display region 1012 of the OLED display panel 1001 are displayed in the same manner; when the camera needs to be shot, the function addition area 1011 is not displayed and is only used for lighting and shooting of the camera, and the display area 1012 displays a framing picture in real time.
Because the anode metal patterns of the anode layer are designed in the function additional area in a difference mode, the light transmittance of the function additional area is increased on the basis of ensuring the display function of the function additional area to be normal.
As described above, it will be apparent to those skilled in the art that other various changes and modifications can be made according to the technical solutions and concepts of the present application, and all such changes and modifications shall fall within the scope of the claims of the present application.
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