CN110767831B - Transparent OLED substrate, display panel, array substrate, display screen and display device - Google Patents

Transparent OLED substrate, display panel, array substrate, display screen and display device Download PDF

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Publication number
CN110767831B
CN110767831B CN201811627657.5A CN201811627657A CN110767831B CN 110767831 B CN110767831 B CN 110767831B CN 201811627657 A CN201811627657 A CN 201811627657A CN 110767831 B CN110767831 B CN 110767831B
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electrode
substrate
oled substrate
light emitting
organic light
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CN110767831A (en
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张露
童晓阳
周志伟
楼均辉
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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    • 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
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H10K50/813—Anodes characterised by their shape
    • 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
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors

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  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
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  • Electroluminescent Light Sources (AREA)

Abstract

The application provides a transparent OLED substrate, a display panel, an array substrate, a display screen and a display device. The transparent OLED substrate comprises a substrate, a first electrode layer formed on the substrate, a light emitting layer formed on the first electrode layer, and a second electrode layer formed on the light emitting layer. Wherein no pixel defining layer is disposed on the first electrode layer. The transparent OLED substrate, the display panel, the array substrate, the display screen and the display device can improve diffraction superposition caused by complex film layer structure when light transmits through the transparent OLED substrate.

Description

Transparent OLED substrate, display panel, array substrate, display screen and display device
Technical Field
The application relates to the technical field of display, in particular to a transparent OLED substrate, a display panel, an array substrate, a display screen and a display device.
Background
With the rapid development of electronic devices, the requirements of users on screen occupation ratios are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more by the industry. Traditional electronic equipment such as cell-phone, panel computer etc. owing to need integrate such as leading camera, earphone and infrared sensing element etc. so the accessible is slotted (Notch) on the display screen, sets up camera, earphone and infrared sensing element etc. in the fluting region, but the fluting region can not be used for the display screen, like the bang screen among the prior art, or adopts the mode of trompil on the screen, to the electronic equipment who realizes the function of making a video recording, external light accessible screen on trompil department get into the photosensitive element who is located the screen below. However, these electronic devices are not all full-screen in the true sense, and cannot display in each area of the whole screen, for example, the camera area cannot display the picture.
Disclosure of Invention
According to a first aspect of embodiments herein, there is provided a transparent OLED substrate comprising:
a substrate;
a first electrode layer formed on the substrate;
a light emitting layer formed on the first electrode layer;
a second electrode layer formed on the light emitting layer;
wherein no pixel defining layer is disposed on the first electrode layer.
In one embodiment, the first electrode layer includes a plurality of first electrodes extending in a first direction;
the second electrode layer is a surface electrode.
In one embodiment, the distance between two adjacent first electrodes is 18 μm to 30 μm. So set up, can avoid when the organic luminescent material of coating by vaporization because the opening of mask plate and the counterpoint deviation of first electrode, and lead to expecting to coat by vaporization organic luminescent material to the first electrode that corresponds on other first electrodes adjacent with this first electrode, and then cause the problem of the colour mixture that transparent OLED base plate appears when showing, improve the display effect of transparent OLED base plate.
In one embodiment, each of the first electrodes comprises an electrode block, and the projection of the first electrode on the substrate is composed of one first graphic unit or is composed of two or more first graphic units which are connected;
preferably, the first graphic unit is circular, oval, dumbbell-shaped, gourd-shaped or rectangular; when the first graphic unit is circular, oval, dumbbell shape and calabash shape, then the width of first electrode in the second direction changes continuously or changes discontinuously to make interval between two adjacent first electrodes change continuously or change discontinuously, then between the different width position of first electrode and the different interval of adjacent first electrode, the position of the diffraction stripe that produces is different, the derivative effect of different positions department offsets each other, thereby can effectively weaken the diffraction effect, and then ensure that the figure that the camera that sets up below the transparent OLED base plate was shot and is obtained has higher definition.
Preferably, in a second direction perpendicular to the first direction, a dimension of the first electrode ranges from 30 μm to (a-X) μm, where a is a dimension of the organic light emitting material correspondingly disposed on the first electrode in the second direction, X is a minimum process dimension, and a is greater than or equal to (30 + X) μm.
In one embodiment, the light emitting layer includes a block of organic light emitting material disposed on the first electrode, the organic light emitting material extending in the same direction as the first electrode, and the organic light emitting material entirely covers the first electrode; with such an arrangement, the effective light-emitting area of the organic light-emitting material can be made larger when the size of the first electrode is constant.
Preferably, the colors of the organic light emitting materials correspondingly arranged on the two adjacent first electrodes are different;
preferably, the plurality of first electrodes with the same color of the organic light emitting materials correspondingly arranged are electrically connected; the plurality of first electrodes corresponding to the organic light-emitting materials with the same color can be connected to the same data signal, so that the organic light-emitting materials with the same color can be controlled to emit light simultaneously;
preferably, the projection of the organic light-emitting material correspondingly arranged on the first electrode on the substrate is composed of one second graphic unit or is composed of two or more second graphic units which are connected, and the first graphic unit is the same as or different from the second graphic unit; when the second image units are different, the diffraction effect generated when light passes through the transparent OLED substrate can be further weakened;
in one embodiment, the light-emitting layer includes a plurality of organic light-emitting materials correspondingly disposed on the first electrode, the plurality of organic light-emitting materials are disposed at intervals along an extending direction of the first electrode, and an insulating layer is disposed between two adjacent organic light-emitting materials; the insulating layer can prevent the first electrode and the second electrode layer from being short-circuited, so that the transparent OLED substrate cannot normally display.
The colors of a plurality of organic light-emitting materials correspondingly arranged on the same first electrode are the same or different;
preferably, the plurality of organic light emitting materials correspondingly arranged on the same first electrode have the same color, and the plurality of first electrodes correspondingly arranged on the same first electrode have the same color and are electrically connected; with this arrangement, the plurality of first electrodes 21 corresponding to the organic light emitting materials of the same color can be connected to the same data signal, so that the organic light emitting materials of the same color can be controlled to emit light simultaneously;
preferably, the projection of each organic light emitting material correspondingly arranged on the first electrode on the substrate is composed of a second graphic unit, and the first graphic unit is the same as or different from the second graphic unit; when the second image units are different, the diffraction effect generated when light passes through the transparent OLED substrate can be further weakened by the second image units;
in one embodiment, each of the first electrodes includes a plurality of block electrodes arranged at intervals in the first direction;
the light-emitting layer comprises a block of organic light-emitting material correspondingly arranged on each block electrode, and the colors of the organic light-emitting materials arranged on the plurality of block electrodes of the same first electrode are the same or different;
preferably, in a second direction perpendicular to the first direction, two adjacent block-shaped electrodes of the same first electrode are arranged in a staggered manner, so that a diffraction effect generated when light passes through the transparent OLED substrate can be further reduced.
Preferably, in the second direction, in a plurality of block electrodes of the same first electrode, a distance between central axes of two adjacent block electrodes along the first direction is 0.5 times or 1.5 times of a size of the organic light emitting material in the second direction;
preferably, in the plurality of block electrodes of the same first electrode, a connecting portion is disposed between two adjacent block electrodes, and the two adjacent block electrodes are electrically connected through the connecting portion, so that the organic light-emitting materials disposed on the plurality of block electrodes of the same first electrode can emit light simultaneously;
preferably, the colors of the plurality of organic light emitting materials correspondingly arranged on the same first electrode are the same, and the first electrodes correspondingly arranged with the same color of the organic light emitting materials are electrically connected, so that the plurality of first electrodes corresponding to the organic light emitting materials with the same color can be connected to the same data signal, thereby controlling the organic light emitting materials with the same color to emit light simultaneously;
preferably, the projection of the block electrode on the substrate is composed of a first graphic unit, and the first graphic unit is circular, oval, dumbbell-shaped, gourd-shaped or rectangular; when the first graphic unit is in a circular shape, an oval shape, a dumbbell shape or a gourd shape, the widths of the two adjacent block-shaped electrodes in the second direction are continuously or discontinuously changed, so that the distance between the two adjacent block-shaped electrodes is continuously or discontinuously changed, the positions of the generated diffraction stripes are different between different width positions of the block-shaped electrodes and different distances between the two adjacent block-shaped electrodes, and the derivative effects at different positions are mutually offset, so that the diffraction effect can be effectively weakened, and the pattern obtained by photographing through a camera arranged below the transparent OLED substrate has high definition;
preferably, the projection of the organic light-emitting material correspondingly arranged on the block electrode on the substrate is composed of a second graphic unit, and the first graphic unit is the same as or different from the second graphic unit; (ii) a When the second image units are different, the diffraction effect generated when light passes through the transparent OLED substrate can be further weakened;
preferably, in each first electrode, the distance between two adjacent block electrodes is 18 μm to 30 μm, so as to avoid a problem that when an organic light emitting material is evaporated, due to alignment deviation between an opening of an evaporation mask plate and the block electrode, the organic light emitting material which is expected to be evaporated on the corresponding block electrode is evaporated on other block electrodes adjacent to the block electrode, and further color mixing occurs in display of the transparent OLED substrate, thereby improving the display effect of the transparent OLED substrate.
In one embodiment, the light emitting layer includes an organic light emitting material and a common layer;
the common layer includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, and at least one of the common layers covers the first electrode and a gap between the first electrodes.
In one embodiment, the light emitting layer includes organic light emitting materials correspondingly disposed on the first electrodes, and support pillars are disposed on the first electrode layers and are disposed at positions where no organic light emitting material is disposed on the first electrodes and/or between adjacent first electrodes; the support column can support a mask plate for evaporating an organic light-emitting material, so that the mask plate is prevented from wrinkling, and the evaporation precision is improved;
preferably, the material of the supporting pillar is a transparent organic material or a transparent inorganic material, so as to improve the light transmittance of the transparent OLED substrate 100;
preferably, in a second direction perpendicular to the extending direction of the first electrode, the size of the organic light emitting material correspondingly disposed on the first electrode is greater than or equal to the size of the first electrode, and when the size of the first electrode in the second direction is constant, the effective light emitting area of the organic light emitting material can be maximized.
In one embodiment, the material of the first electrode layer and/or the second electrode layer is a transparent material;
preferably, the light transmittance of the transparent material is greater than or equal to 90%;
preferably, the transparent material comprises indium tin oxide, indium zinc oxide, silver-doped indium tin oxide or silver-doped indium zinc oxide.
According to a second aspect of the embodiments of the present application, a display panel is provided, where the display panel includes the above-mentioned transparent OLED substrate and a first encapsulation layer, and the first encapsulation layer is disposed on a side of the transparent OLED substrate, which is away from the substrate.
According to a third aspect of the embodiments of the present application, there is provided an array substrate, where the array substrate includes a first OLED substrate and a second OLED substrate, the first OLED substrate includes the above-mentioned transparent OLED substrate, and the second OLED substrate is a non-transparent OLED substrate;
the second OLED substrate comprises a substrate, a third electrode layer formed on the substrate, a pixel limiting layer formed on the third electrode layer and provided with a pixel opening, a light emitting layer formed in the pixel opening and a fourth electrode layer formed on the light emitting layer;
the first OLED substrate and the second OLED substrate share the same substrate, and a light emitting layer of the first OLED substrate and a light emitting layer of the second OLED substrate are formed in the same process.
In one embodiment, the first OLED substrate is at least partially surrounded by the second OLED substrate;
preferably, the first OLED substrate is a PMOLED-like substrate or a PMOLED substrate, and the second OLED substrate is an AMOLED substrate;
the PMOLED-like substrate is a transparent OLED substrate of which the first electrode comprises an electrode block;
preferably, each of the third electrodes is provided with one organic light emitting material, the first electrode layer of the first OLED substrate includes a plurality of first electrodes extending along a first direction, a distance between two adjacent organic light emitting materials on the same first electrode in the first direction is d1, a distance between two adjacent organic light emitting materials in the second OLED substrate in the first direction is d2, and a ratio of d1 to d2 ranges from 2 to 3.
According to a fourth aspect of the embodiments of the present application, a display screen is provided, where the display screen includes the above array substrate and a second package structure, the second package structure is disposed on the array substrate, and disposed on one side of the array substrate, which deviates from the substrate, and a photosensitive device may be disposed below the first OLED substrate of the array substrate.
According to a fifth aspect of embodiments of the present application, there is provided a display device including:
an apparatus body having a device region;
the display screen covers the equipment body;
the device area is located below the first OLED substrate, and a photosensitive device which penetrates through the first OLED substrate to collect light is arranged in the device area.
In one embodiment, the light sensing device comprises a camera and/or a light sensor.
The embodiment of the application provides a transparent OLED base plate, display panel, array substrate, display screen and display device, because do not set up the pixel on the first electrode layer of transparent OLED base plate and prescribe a limit to the layer, compare with traditional transparent OLED base plate, the rete structure has been simplified, the diffraction stack phenomenon that leads to because of the rete structure is complicated when can effectively improving the light transmission, and then the image quality that the promotion set up the camera shooting in the shady face of transparent OLED base plate, avoid appearing the image distortion defect.
Drawings
FIG. 1 is a cross-sectional view of a transparent OLED substrate provided by an embodiment of the present application;
FIG. 2 is a top view of a transparent OLED substrate provided in the embodiments of the present application;
FIG. 3 is a schematic projection view of a first electrode layer of a transparent OLED substrate provided in an embodiment of the present application on a substrate;
fig. 4 is another schematic projection diagram of the first electrode layer of the transparent OLED substrate provided in the embodiment of the present application on the substrate;
fig. 5 is a schematic projection view of a first electrode layer of a transparent OLED substrate provided in an embodiment of the present application on a substrate;
fig. 6 is a schematic view of another projection of the first electrode layer of the transparent OLED substrate provided in this embodiment of the present application onto the substrate;
FIG. 7 is a schematic view of a projection of a first electrode layer of a transparent OLED substrate onto a substrate according to an embodiment of the present disclosure;
fig. 8 is a schematic view of a further projection of the first electrode layer of the transparent OLED substrate provided in this embodiment of the present application onto the substrate;
fig. 9 is a schematic projection diagram of the light emitting material layer, the insulating layer and the first electrode layer of the transparent OLED substrate provided in the embodiment of the present application on the substrate;
fig. 10 is a schematic projection view of the light-emitting material layer and the first electrode layer of the transparent OLED substrate provided in the embodiment of the present application on the substrate;
fig. 11 is a cross-sectional view of a display panel provided in an embodiment of the present application;
fig. 12 is a schematic structural diagram of an array substrate provided in an embodiment of the present application;
fig. 13 is a side view of a display device provided by an embodiment of the present application;
fig. 14 is a schematic structural diagram of an apparatus body of a display device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.
The display panel and the method for manufacturing the display panel in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented by or combined with each other without conflict.
On intelligent electronic equipment such as a mobile phone and a tablet computer, because a photosensitive device such as a front camera and a light sensor needs to be integrated, full-screen display of the electronic equipment is generally realized by arranging a transparent display screen on the electronic equipment.
However, the quality of light collected by the camera through the transparent display screen is poor, and even in the image collection process, image distortion defects can occur. The inventor finds that the reason for such a problem is that the film layer structure in the transparent display screen of the electronic device is complex, and external light passing through the film layer structure causes complex diffraction intensity distribution, so that diffraction fringes occur, and the normal operation of the photosensitive device is affected. For example, when a camera positioned below the transparent display area works, when external light passes through a pixel limiting layer of the display screen, the boundary of the pixel limiting layer and the boundary of a pixel opening formed in the pixel limiting layer can generate obvious diffraction, so that a picture shot by the camera is distorted.
In order to solve the above problems, embodiments of the present application provide a transparent OLED substrate, which can well solve the above problems. Fig. 1 is a cross-sectional view of a transparent OLED substrate 100 provided in an embodiment of the present application, and fig. 2 is a top view of the transparent OLED substrate 100 provided in the embodiment of the present application. Referring to fig. 1 and 2, the transparent OLED substrate 100 includes a substrate 1, a first electrode layer 2 formed on the substrate 1, a light emitting layer 3 formed on the first electrode layer 2, and a second electrode layer 4 formed on the light emitting layer 3. Wherein, no pixel definition layer is arranged on the first electrode layer 2. Of these, fig. 2 shows only one top view of the transparent OLED substrate 100, and the top view of the transparent OLED substrate 100 may be different from that of fig. 2.
In the embodiment of the present application, for convenience of description, the up-down direction is determined by defining the direction from the substrate 1 to the first electrode layer 2 as up and the direction from the first electrode layer 2 to the substrate 1 as down. It is easy to understand that the different direction definitions do not affect the actual operation of the process and the actual shape of the product.
The conventional transparent OLED substrate includes a substrate, a first electrode layer formed on the substrate, a pixel defining layer formed on the first electrode layer and having a pixel defining opening, a light emitting layer formed in the pixel opening, and a second electrode layer formed on the light emitting layer, wherein each layer is made of a transparent material.
The embodiment of the application provides a transparent OLED base plate 100, because do not set up the pixel on the first electrode layer 2 and prescribe a limit to the layer, compare with traditional transparent OLED base plate, simplified membranous layer structure, because of the diffraction stack phenomenon that the membranous layer structure is complicated and leads to when can effectively improving light transmission, and then promote the image quality that sets up the camera shooting in this transparent OLED base plate's shady face, avoid appearing the image distortion defect.
In one embodiment, the substrate 1 may be a flexible substrate or a rigid substrate. The flexible substrate may be a transparent substrate made of one or more of PEN (polyethylene naphthalate), PET (polyethylene terephthalate), PI (polyimide), PES (polyethersulfone resin), PC (polycarbonate), PEI (polyetherimide). The rigid substrate may be a transparent substrate such as a glass substrate, a quartz substrate, or a plastic substrate.
In one embodiment, the first electrode layer 2 may be an anode layer and the second electrode layer 4 may be a cathode layer.
Referring to fig. 3 to 8, the first electrode layer 2 may include a plurality of first electrodes 21 extending in the first direction. Wherein the first direction may be a row direction or a column direction. When the first electrodes 21 extend in the row direction, the first electrode layer 2 includes a column of a plurality of rows of the first electrodes 21; when the first electrodes 21 extend in the column direction, the first electrode layer 2 includes one row and a plurality of columns of the first electrodes 21. Fig. 3 to 8 only illustrate the first direction as a row direction, and the schematic diagram of the first electrode 21 is not shown when the first direction is a column direction. The second electrode layer 4 may be a surface electrode covering the first electrode 21 and the gap between the first electrodes 21.
In one embodiment, the light emitting layer 3 comprises an organic light emitting material and a common layer. The common layer includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The hole transport layer and the hole injection layer are positioned between the substrate 1 and the organic light-emitting material, the hole transport layer is positioned on the hole injection layer, the electron transport layer is positioned on the organic light-emitting material, and the electron injection layer is positioned on the electron transport layer. At least one of the common layers covers the first electrode 21 and a gap between the first electrodes 21. Optionally, each layer of the common layer covers the first electrode 21 and the gap between the first electrodes 21, that is, each layer of the common layer is of a whole layer structure. With such an arrangement, the process steps for preparing the common layer are relatively simple.
In one embodiment, support posts 4 may be disposed on the first electrode layer 2. Referring to fig. 9, the support pillars 4 are disposed on the first electrodes 21 at positions where no organic light emitting material 31 is disposed and/or between adjacent first electrodes 21. The support column 4 can support a mask plate for evaporating an organic light-emitting material, so that the mask plate is prevented from wrinkling, and the evaporation precision is improved. Preferably, the material of the supporting column is a transparent organic material or a transparent inorganic material. Therefore, the light transmittance of the transparent OLED substrate 100 can be improved, and the intensity of light collected by the photosensitive device arranged below the transparent OLED substrate 100 can be increased.
Since the pixel defining layer is not provided on the first electrode 21, the shape of the organic light emitting material formed on the first electrode 21 is defined by the opening of the mask plate when the organic light emitting material is deposited.
In one embodiment, in a second direction perpendicular to the first direction, the size of the organic light emitting material 31 correspondingly disposed on the first electrode 21 is greater than or equal to the size of the first electrode 21. As shown in fig. 2 to 8, the size of the organic light emitting material 31 correspondingly disposed on the first electrode 21 in the second direction is larger than that of the first electrode 21. When the transparent OLED substrate 100 is in operation, the effective light emitting area of the organic light emitting material 31 disposed on the first electrode 21 is the area of the overlapping portion of the first electrode 21 and the organic light emitting material 31 in the direction perpendicular to the substrate 1. When the width of the first electrode 21 is constant, and the size of the organic light emitting material 31 correspondingly disposed on the first electrode 21 is greater than or equal to the size of the first electrode 21, the size of the effective light emitting area of the organic light emitting material 31 is equal to the size of the first electrode 21. Therefore, when the size of the organic light emitting material 31 correspondingly disposed on the first electrode 21 is greater than or equal to the size of the first electrode 21, the actual light emitting area of the organic light emitting material 31 can be maximized, and the display effect of the transparent OLED substrate can be further improved.
In one embodiment, in the second direction, the distance W1 between two adjacent first electrodes 21 may be 18 μm to 30 μm, for example, 18 μm, 20 μm, 25 μm, 30 μm, and the like. With such an arrangement, it can be avoided that when the organic light emitting material is evaporated, the organic light emitting material 31 which is expected to be evaporated onto the corresponding first electrode 21 is evaporated onto the other first electrodes 21 adjacent to the first electrode 21 due to the alignment deviation between the opening of the mask plate and the first electrode 21, and then the color mixing problem of the transparent OLED substrate occurring during display is caused, and the display effect of the transparent OLED substrate 100 is improved.
In one embodiment, in a second direction perpendicular to the first direction, a dimension W2 of the first electrode 21 ranges from 30 μm to (a-X) μm, where a is a dimension of the organic light emitting material 31 correspondingly disposed on the first electrode 21 in the second direction, X is a minimum process dimension, and a is greater than or equal to (30 + X) μm. Wherein, X can be 4 μm, 3 μm, 2 μm, etc.
In one embodiment, referring to fig. 3 and 4, each of the first electrodes 21 includes an electrode block, and the projection of the first electrode 21 on the substrate 1 is composed of one first pattern unit or is composed of two or more first pattern units connected together. The first graphic unit can be circular, oval, dumbbell-shaped, gourd-shaped or rectangular. The projection of the first electrode 21 onto said substrate 1 shown in fig. 3 is composed of a number of connected first picture elements, which are oval. The projection of the first electrode 21 onto said substrate 1 shown in fig. 4 consists of one first picture element, which is rectangular. Preferably, the first pattern unit is circular, oval, dumbbell-shaped or gourd-shaped, and the width of the first electrode 21 in the second direction changes continuously or discontinuously, so that the distance between two adjacent first electrodes 21 changes continuously or discontinuously, and the positions of the generated diffraction fringes are different between different width positions of the first electrode 21 and different distances between two adjacent first electrodes 21, and the derivative effects at different positions offset each other, so that the diffraction effect can be effectively reduced, and the pattern obtained by photographing with a camera disposed below the transparent OLED substrate 100 has high definition.
In an alternative, referring to fig. 10, when each of the first electrodes 21 includes one electrode block, the organic light emitting material correspondingly disposed on each of the first electrodes 21 is a block of organic light emitting material 31, and the extending direction of the organic light emitting material 31 is the same as the extending direction of the first electrode 21, that is, the organic light emitting material 31 extends along the first direction.
Further, referring to fig. 10 again, the organic light emitting material correspondingly disposed on the first electrode 21 entirely covers the first electrode 21. By such an arrangement, the effective light-emitting area of the organic light-emitting material can be larger.
Further, the colors of the organic light emitting materials 31 correspondingly disposed on two adjacent first electrodes 21 are different. Thus, the color displayed by the transparent OLED substrate 100 can be richer.
Further, the first electrodes 21 with the same color corresponding to the organic light emitting materials 31 are electrically connected, for example, the first electrodes 21 with red color corresponding to the organic light emitting materials are electrically connected, the first electrodes 21 with green color corresponding to the organic light emitting materials are electrically connected, and the first electrodes 21 with blue color corresponding to the organic light emitting materials are electrically connected. With this configuration, the plurality of first electrodes 21 corresponding to the organic light emitting materials of the same color can be connected to the same data signal, so that the organic light emitting materials of the same color can be controlled to emit light simultaneously.
In another alternative, the projection of the organic light emitting material 31 correspondingly disposed on the first electrode 21 on the substrate 1 is composed of one second pattern unit or is composed of two or more second pattern units connected, and the first pattern unit is the same as or different from the second pattern unit. Wherein the second picture element may be, for example, circular, oval, dumbbell, gourd-shaped, rectangular, or the like. Preferably, the first pattern unit is different from the second pattern unit, for example, the first pattern unit is circular and the second pattern unit is rectangular, or the first pattern unit is rectangular and the second pattern unit is elliptical, so that the diffraction effect generated when light passes through the transparent OLED substrate 100 can be further reduced.
Further, as shown in fig. 9, the light emitting layer 3 includes a plurality of organic light emitting materials 31 correspondingly disposed on the first electrode 21, the plurality of organic light emitting materials 31 are disposed at intervals along the extending direction of the first electrode 21, and an insulating layer 5 is disposed between two adjacent organic light emitting materials. The insulating layer 5 may be strip-shaped and extends along the second direction. The insulating layer 5 can insulate the portion of the first electrode 21 between two adjacent organic light emitting materials 31 from the second electrode layer 4, so as to avoid the situation that the transparent OLED substrate 100 cannot work normally due to a short circuit between the first electrode 21 and the second electrode layer 4. Wherein the insulating layer 5 isThe material can be SiO 2 SiNx and Al 2 O 3 Etc. to improve the light transmittance of the insulating layer 5.
Wherein, the colors of the plurality of organic light emitting materials 31 correspondingly disposed on the same first electrode 21 may be the same or different.
Preferably, the colors of the plurality of organic light emitting materials correspondingly disposed on the same first electrode 21 are the same, and the first electrodes 21 correspondingly disposed with the same color of the organic light emitting materials are electrically connected. For example, the first electrodes 21 corresponding to red organic light emitting materials are electrically connected, the first electrodes 21 corresponding to green organic light emitting materials are electrically connected, and the first electrodes 21 corresponding to blue organic light emitting materials are electrically connected. With this configuration, the plurality of first electrodes 21 corresponding to the organic light emitting materials of the same color can be connected to the same data signal, so that the organic light emitting materials of the same color can be controlled to emit light simultaneously.
Further, the projection of each organic light emitting material 31 correspondingly disposed on the first electrode 21 on the substrate 1 is composed of a second graphic unit, and the first graphic unit is the same as or different from the second graphic unit. Wherein the second picture element may be, for example, circular, oval, dumbbell, gourd-shaped, rectangular, or the like. Preferably, the first graphic unit is different from the second graphic unit to further reduce diffraction effect generated when light passes through the transparent OLED substrate 100.
In another embodiment, as shown in fig. 5 to 8, each of the first electrodes 21 includes a plurality of block electrodes 211 spaced along the first direction. The projection of the block-shaped electrode 211 on the substrate 1 is composed of a first graphic unit, and the first graphic unit is circular, oval, dumbbell-shaped, gourd-shaped or rectangular. The projection of the block electrode 211 shown in fig. 5 onto the substrate 1 consists of a first picture element in the shape of a gourd; the projection of the block electrode 211 shown in fig. 6 on the substrate 1 consists of a first picture element of dumbbell shape; the projection of the block electrode 211 on the substrate 1 shown in fig. 7 and 8 consists of a rectangular first picture element.
The widths of the first electrodes 21 in the second direction shown in fig. 5 and 6 are continuously or discontinuously changed, so that the distance between two adjacent first electrodes 21 is continuously or discontinuously changed, positions of the generated diffraction fringes are different between different width positions of the first electrodes 21 and different distances between adjacent first electrodes 21, and derivative effects at different positions are mutually offset, so that the diffraction effect can be effectively reduced, and a figure photographed by a camera arranged below the transparent OLED substrate 100 has high definition.
Further, the light emitting layer 3 includes a block of organic light emitting material correspondingly disposed on each of the block electrodes 211, and the organic light emitting materials disposed on the plurality of block electrodes 211 of the same first electrode 21 have the same or different colors.
Further, as shown in fig. 8, two adjacent block electrodes 211 of the first electrode 21 are disposed to be shifted in the second direction. This arrangement further reduces diffraction effects that occur when light passes through the transparent OLED substrate 100.
Preferably, in the second direction, a distance W3 between two adjacent block electrodes 211 on the first electrode 21 along the central axis in the first direction is 0.5 times or 1.5 times a dimension of the block electrode 211 in the second direction. In other embodiments, W3 may also be 1.0 times, 0.8 times, etc. the size of the bulk electrode 211 in the second direction. Further, the central axes of the two block electrodes 211 on the two sides of the same block electrode 211 along the first direction may be located on the same straight line, so that the arrangement of the plurality of block electrodes 211 of the first electrode 21 is more regular.
Further, in the plurality of block electrodes 211 of the first electrode 21, a connection portion 212 is disposed between two adjacent block electrodes 211, and the two adjacent block electrodes 211 are electrically connected through the connection portion 212. So that the organic light emitting materials disposed on the plurality of bulk electrodes 211 of the first electrode 21 can emit light simultaneously.
Preferably, the organic light emitting materials correspondingly disposed on the plurality of block electrodes 211 of the same first electrode 21 have the same color, and the correspondingly disposed first electrodes 21 having the same color of the organic light emitting materials are electrically connected. With this configuration, the plurality of first electrodes 21 corresponding to the organic light emitting materials of the same color can be connected to the same data signal, so that the organic light emitting materials of the same color can be controlled to emit light simultaneously.
Preferably, the projection of the organic light emitting material correspondingly disposed on the bulk electrode 211 on the substrate 1 is composed of a second graphic unit, and the first graphic unit is the same as or different from the second graphic unit. Wherein the second picture element may be, for example, circular, oval, dumbbell, gourd-shaped, rectangular, or the like. Preferably, the first graphic unit is different from the second graphic unit to further reduce diffraction effect generated when light passes through the transparent OLED substrate 100.
Further, when the colors of the organic light emitting materials correspondingly disposed on two adjacent bulk electrodes 211 in the first electrode 21 are different, the distance between two adjacent bulk electrodes 211 may be 18 μm to 30 μm. With such an arrangement, it is avoided that when the organic light emitting material is evaporated, due to the alignment deviation between the opening of the evaporation mask and the block electrode, the organic light emitting material 31 on the corresponding block electrode 211 is expected to be evaporated onto other block electrodes 211 adjacent to the block electrode 211, and then the color mixture of the transparent OLED substrate appearing during display is caused, thereby improving the display effect of the transparent OLED substrate 100.
In order to improve the light transmittance of the transparent OLED substrate 100, transparent materials may be used for each layer of the transparent OLED substrate 100. For example, the material of the first electrode layer 2 and/or the second electrode layer 4 is a transparent material. Preferably, the light transmittance of the transparent material for preparing the first electrode layer 2 and/or the second electrode layer 4 is greater than or equal to 90%. Further, the transparent material for preparing the first electrode layer 2 and/or the second electrode layer 4 comprises indium tin oxide, indium zinc oxide, silver-doped indium tin oxide or silver-doped indium zinc oxide.
The embodiment of the present application further provides a display panel 200, as shown in fig. 11, the display panel includes the transparent OLED substrate 100 and the first encapsulation layer 6 described in the above embodiment, and the first encapsulation layer 6 is disposed on a side of the transparent OLED substrate 100, which is away from the substrate 1.
Because the display panel 200 adopts the transparent OLED substrate 100 according to the above embodiment, the diffraction superposition phenomenon caused by the complex film structure when light transmits through the display panel 200 can be effectively improved, and thus the quality of an image shot by a camera arranged on the backlight surface of the display panel 200 is improved, and the defect of image distortion is avoided.
The first encapsulation layer 6 may be a thin film encapsulation structure, and the thin film encapsulation structure may include a stack of alternately stacked organic material layers and inorganic material layers, where the organic material layers and the inorganic material layers are both transparent materials, and the material of the inorganic material layers may be, for example, siO 2 SiNx and Al 2 O 3 And the material of the organic material layer may be, for example, PI, PET, or the like. The first encapsulation layer 6 may also be a glass cover plate or a glass frit encapsulation structure.
The embodiment of the present application further provides an array substrate 300. As shown in fig. 12, the array substrate 300 includes a first OLED substrate 301 and a second OLED substrate 302, where the first OLED substrate 301 is the transparent OLED substrate 100 according to the above embodiment, and the second OLED substrate 302 is a non-transparent OLED substrate.
Since the first OLED substrate 301 employs the transparent OLED substrate 100 in the above embodiments, the diffraction superposition phenomenon caused by the complex film structure when light transmits through the first OLED substrate 301 can be effectively improved, so as to ensure that the photosensitive device located below the first OLED substrate 301 can work normally. It can be understood that when the photosensitive device does not operate, the first OLED substrate 301 may normally perform dynamic or static image display, and when the photosensitive device operates, the first OLED substrate 301 changes along with the change of the whole display content of the array substrate 300, for example, displaying an external image being photographed, or the first OLED substrate 301 may also be in a non-display state, so as to further ensure that the photosensitive device can normally perform light collection through the array substrate 300.
The second OLED substrate 302 may include a substrate, a third electrode layer formed on the substrate, a pixel defining layer formed on the third electrode layer and provided with a pixel opening, a light emitting layer formed in the pixel opening, and a fourth electrode layer formed on the light emitting layer; the first OLED substrate 301 and the second OLED substrate 302 may share the same substrate, and the light emitting layer of the first OLED substrate 301 and the light emitting layer of the second OLED substrate 302 are formed in the same process.
Further, the first OLED substrate 301 is at least partially surrounded by the second OLED substrate 302. In the array substrate 300 shown in fig. 12, the first OLED substrate 301 is partially surrounded by the second OLED substrate 302, and in other embodiments, the first OLED substrate 301 may be completely surrounded by the second OLED substrate 302.
Further, the first OLED substrate 301 may be a PMOLED-like substrate or a PMOLED substrate, and the second OLED substrate 302 is an AMOLED substrate.
When the first OLED substrate 301 is the above-mentioned transparent OLED substrate 100 and the first electrode of the transparent OLED substrate 100 includes one electrode block, the first electrode drives a plurality of organic light emitting materials or one organic light emitting material on the first electrode to emit light, so that the first OLED substrate 301 is a PMOLED-like substrate.
The third electrode layer of the second OLED substrate 302 includes a plurality of third electrodes, the second OLED substrate 302 further includes transistors disposed in one-to-one correspondence with the plurality of third electrodes, drains of the transistors are connected to the corresponding third electrodes, sources of the transistors are connected to data signals, gates of the transistors are connected to switch signals, so that one transistor controls a corresponding one of the third electrodes, and the second OLED substrate 302 is an AMOLED substrate.
Furthermore, each third electrode is provided with a piece of organic light emitting material, in the first direction, the distance between two adjacent organic light emitting materials on the same first electrode of the first OLED substrate is d1, the distance between two adjacent organic light emitting materials in the second OLED substrate is d2, and the ratio of d1 to d2 ranges from 2 to 3.
The embodiment of the application further provides a display screen, the display screen includes foretell array substrate 300 and second packaging structure, and second packaging structure sets up one side that deviates from the substrate of array substrate 300, the first OLED base plate below of array substrate 300 can set up photosensitive device.
The second packaging layer may be a thin film packaging structure, and the thin film packaging structure may include a stack of alternately stacked organic material layers and inorganic material layers, wherein the organic material layers and the inorganic material layers are both transparent materials, and the inorganic material layer may be, for example, siO 2 SiNx and Al 2 O 3 And the material of the organic material layer may be PI, PET, or the like, for example. The second packaging layer can also be a glass cover plate or a glass powder packaging structure.
The embodiment of the present application further provides a display device 400, as shown in fig. 13, the display device 400 includes an apparatus body 401 and the display screen 402. As shown in fig. 14, the apparatus body 401 has a device region 403, and a display screen 402 is overlaid on the apparatus body 401. The device region 403 is located below the first OLED substrate, and a photosensitive device 404 for collecting light through the first OLED substrate is disposed in the device region 403.
Wherein, the light sensing device 404 may include a camera and/or a light sensor. Other devices besides the photosensitive device 404, such as a gyroscope or a receiver, may also be disposed in the device region 403.
The device region 403 may be a slotted region, and the first OLED substrate of the display screen 402 may be attached to the slotted region, so that the light sensing device 404 can collect external light through the first display region. Because the first OLED substrate of the display screen 402 can effectively improve the diffraction phenomenon generated by the transmission of the external light through the first OLED substrate, the quality of the image shot by the camera can be effectively improved, the distortion of the shot image caused by diffraction is avoided, and meanwhile, the accuracy and the sensitivity of the optical sensor for sensing the external light can also be improved.
The electronic device can be a digital device such as a mobile phone, a tablet, a palm computer and an ipod.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (32)

1. A transparent OLED substrate, comprising:
a substrate;
a first electrode layer formed on the substrate; the first electrode layer includes a plurality of first electrodes extending in a first direction; the projection of the first electrode on the substrate is composed of one first graphic unit or is composed of more than two first graphic units which are connected; or the first electrode comprises a plurality of block electrodes arranged at intervals along the first direction, and the projection of the block electrodes on the substrate is composed of a first graphic unit; the first graphic unit is round, oval, dumbbell-shaped or gourd-shaped; the distance between two adjacent first electrodes changes continuously or discontinuously;
a light emitting layer formed on the first electrode layer;
a second electrode layer formed on the light emitting layer;
wherein the transparent OLED substrate is not provided with a pixel defining layer.
2. The transparent OLED substrate of claim 1,
the second electrode layer is a surface electrode.
3. The transparent OLED substrate of claim 2, wherein the distance between two adjacent first electrodes is 18 μm to 30 μm.
4. The transparent OLED substrate according to claim 1, wherein in a second direction perpendicular to the first direction, the first electrode has a dimension ranging from 30 μm to (A-X) μm, where A is a dimension of the organic light emitting material correspondingly disposed on the first electrode in the second direction, X is a minimum process dimension, and A is greater than or equal to (30 + X) μm.
5. The transparent OLED substrate of claim 1, wherein the light emitting layer comprises a block of organic light emitting material disposed on the first electrode, the organic light emitting material extending in the same direction as the first electrode, and the organic light emitting material entirely covers the first electrode.
6. The transparent OLED substrate according to claim 5, wherein the colors of the organic light emitting materials correspondingly disposed on the two adjacent first electrodes are different.
7. The transparent OLED substrate according to claim 5, wherein the first electrodes of the organic light emitting materials with the same color are electrically connected.
8. The transparent OLED substrate according to claim 5, wherein the projection of the organic light emitting material correspondingly disposed on the first electrode on the substrate is composed of one second pattern unit or is composed of more than two second pattern units connected, and the first pattern unit is the same as or different from the second pattern unit.
9. The transparent OLED substrate according to claim 1, wherein the light-emitting layer comprises a plurality of organic light-emitting materials correspondingly disposed on the first electrode, the plurality of organic light-emitting materials are disposed at intervals along an extending direction of the first electrode, and an insulating layer is disposed between two adjacent organic light-emitting materials;
the colors of a plurality of organic light-emitting materials correspondingly arranged on the same first electrode are the same or different.
10. The transparent OLED substrate of claim 9, wherein the organic light emitting materials disposed on the same first electrode have the same color, and the organic light emitting materials disposed on the same first electrode have the same color and are electrically connected to each other.
11. The transparent OLED substrate according to claim 9, wherein the projection of each organic light emitting material correspondingly disposed on the first electrode onto the substrate is composed of a second pattern unit, and the first pattern unit is the same as or different from the second pattern unit.
12. The transparent OLED substrate of claim 2, wherein each of the first electrodes comprises a plurality of bulk electrodes spaced along the first direction;
the light-emitting layer comprises a block of organic light-emitting material correspondingly arranged on each block electrode, and the colors of the organic light-emitting materials arranged on the plurality of block electrodes of the same first electrode are the same or different.
13. The transparent OLED substrate of claim 12, wherein two adjacent bulk electrodes of the same first electrode are offset in a second direction perpendicular to the first direction.
14. The transparent OLED substrate according to claim 13, wherein in the second direction, the distance between the central axes of two adjacent block electrodes along the first direction is 0.5 times or 1.5 times the dimension of the organic light emitting material in the second direction in the plurality of block electrodes of the same first electrode.
15. The transparent OLED substrate according to claim 12, wherein a connecting portion is disposed between two adjacent block electrodes among the plurality of block electrodes of the same first electrode, and the two adjacent block electrodes are electrically connected through the connecting portion.
16. The transparent OLED substrate of claim 15, wherein the organic light emitting materials disposed on the same first electrode have the same color, and the first electrodes having the same color are electrically connected.
17. The transparent OLED substrate according to claim 12, wherein the projection of the organic light emitting material correspondingly disposed on the bulk electrode onto the substrate is composed of a second pattern unit, and the first pattern unit is the same as or different from the second pattern unit.
18. The transparent OLED substrate according to claim 12, wherein the distance between two adjacent block electrodes in each first electrode is 18 μm to 30 μm.
19. The transparent OLED substrate of claim 2, wherein the light-emitting layer includes an organic light-emitting material and a common layer;
the common layer includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, and at least one of the common layers covers the first electrode and a gap between the first electrodes.
20. The transparent OLED substrate of claim 2, wherein the light emitting layer comprises organic light emitting materials correspondingly disposed on the first electrodes, and support pillars are disposed on the first electrode layer at positions where no organic light emitting material is disposed on the first electrodes and/or between adjacent first electrodes.
21. The transparent OLED substrate according to claim 20, wherein the material of the supporting posts is a transparent organic material or a transparent inorganic material.
22. The transparent OLED substrate according to claim 20, wherein the size of the organic light emitting material correspondingly disposed on the first electrode is greater than or equal to the size of the first electrode in a direction perpendicular to the extending direction of the first electrode.
23. The transparent OLED substrate of claim 1, wherein the material of the first electrode layer and/or the second electrode layer is a transparent material.
24. The transparent OLED substrate of claim 23, wherein the transparent material has a light transmittance of greater than or equal to 90%.
25. The transparent OLED substrate of claim 23, wherein the transparent material includes indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, or silver-doped indium zinc oxide.
26. A display panel comprising the transparent OLED substrate of any one of claims 1-25 and a first encapsulating layer disposed on a side of the transparent OLED substrate facing away from the substrate.
27. An array substrate comprising a first OLED substrate comprising the transparent OLED substrate of any one of claims 1-25 and a second OLED substrate that is a non-transparent OLED substrate;
the second OLED substrate comprises a substrate, a third electrode layer formed on the substrate, a pixel limiting layer formed on the third electrode layer and provided with a pixel opening, a light emitting layer formed in the pixel opening and a fourth electrode layer formed on the light emitting layer;
the first OLED substrate and the second OLED substrate share the same substrate, and a light emitting layer of the first OLED substrate and a light emitting layer of the second OLED substrate are formed in the same process.
28. The array substrate of claim 27, wherein the first OLED substrate is at least partially surrounded by the second OLED substrate.
29. The array substrate of claim 28, wherein the first OLED substrate is a PMOLED-like substrate or a PMOLED substrate, and the second OLED substrate is an AMOLED substrate;
the PMOLED-like substrate is the transparent OLED substrate of any one of claims 7-20.
30. The array substrate of claim 28, wherein the third electrode layer comprises a plurality of third electrodes, each of the third electrodes is provided with a block of organic light emitting material, when the first electrode layer of the first OLED substrate comprises a plurality of first electrodes extending along a first direction, a distance between two adjacent organic light emitting materials on the same first electrode in the first direction is d1, a distance between two adjacent organic light emitting materials in the second OLED substrate in the first direction is d2, and a ratio of d1 to d2 ranges from 2 to 3.
31. A display screen, comprising the array substrate of any one of claims 27 to 30 and a second package structure, wherein the second package structure is disposed on the array substrate and on a side of the array substrate facing away from the substrate, and a photosensitive device is disposed below the first OLED substrate of the array substrate.
32. A display device, characterized in that the display device comprises:
an apparatus body having a device region;
the display screen of claim 31 overlaid on the device body;
the device area is located below the first OLED substrate, and a photosensitive device for collecting light through the first OLED substrate is arranged in the device area;
the photosensitive device comprises a camera and/or a light sensor.
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