CN110767830A - Transparent OLED substrate, array substrate, display screen and display device - Google Patents

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

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Publication number
CN110767830A
CN110767830A CN201811627641.4A CN201811627641A CN110767830A CN 110767830 A CN110767830 A CN 110767830A CN 201811627641 A CN201811627641 A CN 201811627641A CN 110767830 A CN110767830 A CN 110767830A
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electrode
substrate
oled substrate
light emitting
layer
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楼均辉
张露
王云
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology 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
    • 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
    • H10K59/10—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
    • 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
    • H10K59/17—Passive-matrix OLED displays

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

Abstract

The application provides a transparent OLED substrate, an array substrate, a display screen and a display device, wherein the transparent OLED substrate comprises a substrate, a first electrode layer positioned on the substrate, a light emitting structure layer positioned on the first electrode layer, and a second electrode layer positioned on the light emitting structure layer, wherein the first electrode layer comprises a plurality of first electrode groups arranged along a first direction, one first electrode group comprises at least one first electrode, the extending directions of the first electrodes in the same first electrode group are the same, and the first electrode groups extend along a second direction; the light emitting structure layer comprises light emitting structures of n colors, at least one light emitting structure is arranged on each first electrode, the light emitting structures corresponding to the same first electrode are of the same color, the first electrodes of two adjacent first electrode groups are arranged in a staggered mode in the first direction, the distance between the central axes of the two adjacent first electrode groups is d, and the distance between the central axes of the first electrode groups corresponding to the two adjacent light emitting structures of the same color is smaller than n x d in the first direction.

Description

Transparent OLED substrate, array substrate, display screen and display device
Technical Field
The application relates to the field of display, in particular to a transparent OLED substrate, an array substrate, a display screen and a display device.
Background
With the rapid development of display terminals, the requirements of users on screen occupation ratios are higher and higher, so that the comprehensive screen display of the display terminal receives more and more attention in the industry. In a traditional display terminal such as a mobile phone, a tablet personal computer, and the like, as a front camera, a receiver, an infrared sensing element, and the like need to be integrated, full-screen display of the display terminal can be realized by slotting (Notch) on a display screen and arranging a transparent display screen in a slotting area. The display effect of the transparent display screen can be influenced to a certain extent while enough light transmittance is ensured.
Disclosure of Invention
Based on this, this application provides a transparent OLED base plate, array substrate, display screen and display device.
The present application provides a transparent OLED substrate, the transparent OLED substrate includes: the light emitting diode comprises a substrate, a first electrode layer positioned on the substrate, a light emitting structure layer positioned on the first electrode layer, and a second electrode layer positioned on the light emitting structure layer, wherein the first electrode layer comprises a plurality of first electrode groups arranged along a first direction, one first electrode group comprises at least one first electrode, the extending directions of the first electrodes in the same first electrode group are the same, and the first electrode groups extend along a second direction; the light emitting structure layer comprises light emitting structures of n colors, at least one light emitting structure is arranged on each first electrode, the light emitting structures corresponding to the same first electrode are of the same color, the first electrodes of two adjacent first electrode groups are arranged in a staggered mode in the first direction, the distance between the central axes of the two adjacent first electrode groups is d, the distance between the central axes of the first electrode groups corresponding to the light emitting structures of the same color is smaller than n d in the first direction, and the central axes of the first electrode groups are the same as the extending direction of the first electrodes. Due to the fact that the first electrodes of the two adjacent first electrode groups are arranged in a staggered mode, the distance between the adjacent first electrodes and the adjacent light-emitting structures is reduced, the distance between the adjacent first electrodes and the light-emitting structures of the same color is reduced, when the transparent OLED substrate displays a single color, stripes between the adjacent first electrode groups and the light-emitting structures of the same color are reduced or eliminated, and therefore the display effect of the transparent OLED substrate is improved.
Preferably, the first direction is perpendicular to a second direction, the second direction is a length direction of the first electrode, and the first direction is a width direction of the first electrode.
Preferably, the first electrode includes an electrode block, each of the electrode blocks is provided with a plurality of light emitting structures, and the first electrode group includes a first electrode. After one electrode block is electrified, the plurality of light-emitting structures can be excited to emit light.
Preferably, the first electrode includes a plurality of electrode blocks, each of the electrode blocks is provided with a light emitting structure, and the first electrode includes a connecting portion for connecting two adjacent electrode blocks. The plurality of electrode blocks can be driven by the same driving circuit to excite the plurality of light-emitting mechanisms to emit light.
Preferably, the projection of the electrode block on the substrate is circular, square, oval or gourd-shaped.
Preferably, in the first direction, the adjacent first electrodes are staggered from each other by a distance of 0.5 times or 1.5 times the width of the first electrode. Therefore, the distance between the light-emitting structures of the same color adjacent to the first electrode group can be further reduced, and the stripes are reduced or eliminated.
Preferably, the first electrode group includes a plurality of first electrodes, and the light emitting structures on the plurality of first electrodes of one first electrode group have the same color. The plurality of light emitting structures on the first electrode can be used for forming the strip-shaped light with the same color.
Preferably, the plurality of first electrodes in the same first electrode group are electrically connected, and the plurality of first electrodes can be driven by one driving circuit. The plurality of first electrodes can be driven by one driving circuit, which is beneficial to reducing the number of the driving circuits.
Preferably, the light emitting structures corresponding to the first electrodes of the two adjacent first electrode groups are arranged in a staggered manner. Therefore, the distance between the light-emitting structures of the same color adjacent to the first electrode group is further reduced, and the stripes are reduced or eliminated.
Preferably, the projection of the light emitting structure on the substrate is circular, elliptical or dumbbell-shaped.
Preferably, two adjacent first electrode sets are spaced from each other and the spacing is always equal or unequal. When the intervals of the two adjacent first electrodes are equal, the patterning process is simplified, and when the intervals are unequal, the diffraction is improved.
Preferably, the transparent OLED substrate includes a pixel defining layer formed on the first electrode layer, the pixel defining layer having a pixel opening, the light emitting structure being formed in the pixel opening, the pixel defining layer being made of a transparent material; or the transparent OLED substrate is not provided with a pixel defining layer. The transparent pixel limiting layer is arranged or not arranged, so that the light transmittance of the transparent OLED substrate is improved.
Preferably, the second electrode layer comprises a second electrode, and the second electrode is a planar electrode. The formation of the surface electrode can omit the patterning process of the second electrode layer.
Preferably, when the thickness of the second electrode layer is greater than 100 angstroms, the second electrode layer is entirely continuous and has a transparency greater than 40%.
Preferably, when the thickness of the second electrode layer is more than 50 angstroms, the second electrode layer is entirely continuous and has a transparency of > 50%.
Preferably, the first electrode and the second electrode are made of a light-transmitting material. The first electrode and the second electrode are made of light-transmitting materials, so that the transparent OLED substrate is ensured to have enough light transmittance.
Preferably, the light transmittance of the first electrode and the second electrode is not less than 90%. The light transmittance is not less than 90%, and the transparent OLED substrate is further ensured to have sufficient light transmittance.
Preferably, the transparent material comprises indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, silver-doped indium zinc oxide or a magnesium silver mixture.
Preferably, the light transmittance of the first electrode and the second electrode is not less than 90%. The light transmittance is not less than 90%, and the transparent OLED substrate is further ensured to have enough light transmittance
Preferably, the transparent material comprises indium tin oxide, indium zinc oxide, silver doped indium tin oxide, silver doped indium zinc oxide, a mixture of magnesium, silver, aluminium or silver doped indium tin oxide.
The application also provides an array substrate, the array substrate includes first OLED base plate and second OLED base plate, first OLED base plate includes as before transparent OLED base plate, the second OLED base plate is non-transparent base plate, first OLED base plate and the sharing substrate of second OLED base plate.
Preferably, the second OLED substrate at least partially surrounds said first OLED substrate.
Preferably, the first OLED substrate is a PMOLED substrate, and the second OLED substrate is an AMOLED substrate.
Preferably, the array substrate comprises a transition area between the first OLED substrate and the second OLED substrate, the transition area is provided with a data line and a driving circuit, and the data line and the driving circuit do not occupy the first OLED substrate, so that the light transmittance of the first OLED substrate is not affected.
Preferably, the driving circuit has a 7T1C structure.
Preferably, the first direction is a row direction or a column direction, and the second direction is a column direction or a row direction.
Preferably, the plurality of first electrodes of the same first electrode group are all connected to the same driving circuit, or the plurality of first electrodes of the same first electrode group are connected to different driving circuits.
Preferably, the transition region is a non-transparent region.
Preferably, the first transition region is located between the second transition region and the first OLED substrate.
Preferably, the second OLED substrate at least partially surrounds the first transition region, which at least partially surrounds the first OLED substrate.
Preferably, the first OLED substrate has a shape of a drop, a rectangle, or a circle.
Preferably, the second OLED substrate includes a third electrode layer formed on the substrate, a light emitting layer formed on the third electrode, and a fourth electrode layer formed on the light emitting layer, and a thickness of the fourth electrode layer is smaller than a thickness of the second electrode layer. The thickness of the second electrode layer is smaller, and the light transmittance of the first OLED substrate is guaranteed.
Preferably, the material of the fourth electrode layer includes at least one of magnesium and silver;
preferably, the ratio of the mass of magnesium to the mass of silver is in the range of 1:4 to 1: 20.
Preferably, the light emitting layer of the first OLED substrate and the light emitting layer of the second OLED substrate are formed in the same process step, thereby simplifying the manufacturing process.
The present application provides a display screen comprising a transparent OLED substrate as described above.
The application provides a display screen, which comprises the array substrate.
The display device comprises an equipment body and the display screen, wherein the equipment body is provided with a device area; 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. When the transparent OLED substrate displays a single color, the stripes between the light-emitting structures with the same color corresponding to the adjacent first electrode groups are reduced or eliminated through the staggered arrangement of the first electrodes of the adjacent first electrode groups, the display effect of the first OLED substrate is improved, meanwhile, the enough light transmittance of the first OLED substrate is ensured, the photosensitive device is ensured to receive enough light, and therefore the performance of the photosensitive device is improved.
Drawings
FIG. 1 is a schematic top view of a pixel array layer of a transparent OLED substrate;
FIG. 2 is a schematic cross-sectional view of one embodiment of a transparent OLED substrate according to the present application;
FIG. 3 is a schematic cross-sectional view of one embodiment of a transparent OLED substrate according to the present application;
FIG. 4 is a schematic top view of one embodiment of a first electrode layer and a light emitting structure layer of a transparent OLED substrate according to the present application;
FIG. 5 is a schematic top view of one embodiment of a light emitting structure layer of a transparent OLED substrate according to the present application;
FIG. 6 is a schematic top view of one embodiment of a first electrode layer and a light emitting structure layer of a transparent OLED substrate according to the present application;
FIG. 7 is a schematic top view of one embodiment of a first electrode layer and a light emitting structure layer of a transparent OLED substrate according to the present application;
FIG. 8 is a schematic cross-sectional view of one embodiment of a second OLED substrate of the array substrate of the present application;
FIG. 9 is a schematic top view of an embodiment of an array substrate of the present application;
FIG. 10 is a schematic diagram of an embodiment of a display screen of the present application;
FIG. 11 is a schematic structural diagram of an embodiment of a display screen of the present application;
fig. 12 is a schematic structural diagram of an embodiment of a display device according to 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 apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
As described in the background art, in order to improve the light transmittance, strip-shaped pixels may be disposed in the region corresponding to the photosensitive device, as shown in fig. 1. The pixel array layer includes a plurality of pixel units, each pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are all in a strip shape and are arranged in sequence along a transverse direction, and the first sub-pixel, the second sub-pixel and the third sub-pixel are, for example, R, G, B sub-pixels with three colors. When the display panel displays a single color (e.g., red), due to the larger distance between two adjacent first sub-pixels (two pixels R), a distinct stripe appears on the display panel, thereby affecting the display effect.
To solve the above technical problem, the present embodiment provides a transparent OLED substrate, including: the light emitting diode comprises a substrate, a first electrode layer positioned on the substrate, a light emitting structure layer positioned on the first electrode layer, and a second electrode layer positioned on the light emitting structure layer, wherein the first electrode layer comprises a plurality of first electrode groups arranged along a first direction, one first electrode group comprises at least one first electrode, the extending directions of the first electrodes in the same first electrode group are the same, and the first electrode groups extend along a second direction; the light emitting structure layer comprises light emitting structures of n colors, at least one light emitting structure is arranged on each first electrode, the light emitting structures corresponding to the same first electrode are of the same color, the first electrodes of two adjacent first electrode groups are arranged in a staggered mode in the first direction, the distance between the central axes of the two adjacent first electrode groups is d, the distance between the central axes of the first electrode groups corresponding to the light emitting structures of the same color is smaller than n d in the first direction, and the central axes of the first electrode groups are the same as the extending direction of the first electrodes.
Due to the fact that the first electrodes of the two adjacent first electrode groups are arranged in a staggered mode, the distance between the adjacent first electrodes and the adjacent light-emitting structures is reduced, the distance between the adjacent light-emitting structures of the same color is reduced, when the transparent OLED substrate displays a single color, the stripes between the light-emitting structures of the same color corresponding to the adjacent first electrode groups are reduced or eliminated, and therefore the display effect of the transparent OLED substrate is improved.
FIG. 2 is a schematic diagram of a transparent OLED substrate according to one embodiment. Referring to fig. 2, the display panel is a PMOLED display panel, and includes a substrate 1, a first electrode layer 2, a light emitting structure layer 3, a second electrode layer 4, and a pixel defining layer 5. Wherein a first electrode layer 2 is formed on a substrate 1. The pixel defining layer 5 is formed on the first electrode layer 2. The pixel defining layer 5 has a plurality of pixel openings 51, the pixel openings 51 are formed with the light emitting structure layer 3 on the first electrode layer 2, and the second electrode layer 4 is formed on the light emitting structure layer 3. The isolation columns are used for isolating the cathodes (namely the second electrode layer 4) of the sub-pixels in two adjacent rows or two adjacent columns, and limiting the shapes of the cathodes of the sub-pixels in two adjacent rows or two adjacent columns.
The substrate 1 may be a rigid substrate or a flexible substrate, for example, the rigid substrate may be a transparent substrate such as a glass substrate, a quartz substrate, or a plastic substrate, and the flexible substrate may be a flexible PI substrate.
In one embodiment, in order to improve the light transmittance of the display panel, each conductive trace (e.g., the first electrode layer 2 and the second electrode layer 4) of the display panel is made of a transparent material, and the light transmittance of the first electrode and the second electrode is not less than 90%. For example, the first electrode layer 2 and the second electrode layer 4 are both prepared by using transparent conductive metal oxide or magnesium-silver mixture. For example, the first electrode layer 2 and the second electrode layer 4 may be made of ITO (indium tin oxide), indium zinc oxide (IZ), silver-doped indium tin oxide, and silver-doped indium zinc oxide. Further, in order to reduce the resistance of each conductive trace on the basis of ensuring high light transmittance, the first electrode layer 2 and the second electrode layer 4 can be made of materials such as aluminum-doped zinc oxide, silver-doped ITO, or silver-doped IZ. Preferably, the second electrode layer 4 can be made of magnesium, silver, a mixture of Al or ITO doped with Al. Preferably, when the thickness of the second electrode layer 4 is more than 100 angstroms, the second electrode layer 4 is continuous as a whole and has transparency of more than 40%; preferably, when the thickness of the second electrode layer 4 is greater than 50 angstroms, the second electrode layer 4 is entirely continuous and has a transparency of > 50%. It is noted that the pixel defining layer is also made of a transparent material. In other embodiments, the pixel defining layer may not be provided.
The first electrode layer 2 includes a plurality of first electrode groups 20 arranged in the first direction X. The light emitting structure layer 3 includes light emitting structures 31 of n colors, n may be equal to 3, for example, R, G, B (red, green, blue) three-color light emitting structures, and n may also be 4 or more, for example, R, G, B, Y (red, green, blue, yellow) four-color light emitting structures. The second electrode layer 4 comprises a second electrode 41, which may be a planar electrode, and the second electrode layer 4 comprises a second electrode; referring to fig. 3, the second electrode layer 4 may also include a plurality of second electrodes 41A, the plurality of second electrodes 41A may be isolated by isolation pillars (Rib)6, and the embodiment corresponding to fig. 2 is not provided with isolation pillars.
Referring to fig. 4, in an embodiment, each first electrode group 20 includes a first electrode 21, and each first electrode 21 extends along the second direction Y, and of course, the first electrode group 20 also extends along the second direction. Optionally, the first direction X is perpendicular to a second direction Y, the second direction Y is defined as a length direction of the first electrode, and the first direction is defined as a width direction of the first electrode. Each first electrode 21 corresponds to a plurality of light emitting structures 31, and optionally, the color of the light emitting structures on one first electrode is the same (for example, the light emitting structures 31A corresponding to the first electrodes 21A are all red), and the color of the light emitting structures on a plurality of first electrodes 21 of one first electrode group 20 is also the same. For example, the first electrode 21A corresponds to the plurality of red light emitting structures 31A, the first electrode 21B corresponds to the plurality of green light emitting structures 31B, the first electrode 21C corresponds to the plurality of blue light emitting structures 31C, and the first electrode 21D corresponds to the plurality of red light emitting structures 31D.
In the first direction, the first electrodes 21A of the first electrode group 20A and the first electrodes 21B of the first electrode group 20B are arranged in a staggered manner, that is, two first electrodes of adjacent first electrode groups are arranged in a staggered manner. Optionally, the offset distance is 0.5 times the width of the first electrode. In the first direction X, the distances between the first electrode groups (for example, the first electrodes 21A and the first electrodes 21D) corresponding to the two adjacent light-emitting structures of the same color are reduced, and accordingly, the distances between the adjacent light-emitting structures of the same color are reduced. For example, the distance between the red light-emitting structure 31A corresponding to the first electrode 21A and the green light-emitting structure 31B corresponding to the first electrode 21B is reduced, and the distance between the red light-emitting structure 31A corresponding to the first electrode 21A and the red light-emitting structure 31C corresponding to the first electrode 21D is reduced or eliminated when the transparent OLED substrate displays a single color, so that the vertical stripes generated between the light-emitting structures of the same color corresponding to the adjacent first electrode groups are reduced or eliminated, and the display effect is improved.
The distance between the central axis L1 of the first electrode group 20A (in this embodiment, the central axis of the first electrode 21, the same applies hereinafter) and the central axis L2 of the adjacent first electrode group 20B is D, the distance between the central axis L1 of the first electrode group 20A and the central axis L3 of the first electrode group 20D corresponding to the adjacent red light-emitting structure is less than 3D, as can be seen by analogy, the distance between the central axes of the first electrode groups corresponding to the two adjacent light-emitting structures of the same color is less than n × D, and n is the number of colors of the light-emitting structure. Wherein the aforementioned respective central axes L1, L2, L3 each extend in the second direction Y. It is noted that the first electrode may be of an asymmetric configuration and the central axis may represent an approximate bisector of the first electrode group.
In two adjacent first electrode groups, taking the first electrode group 20A and the first electrode group 20B as an example, the first electrode group 20A and the first electrode group 20B (i.e., the first electrode 21A and the first electrode 21B) are spaced from each other, and the distance between the two electrodes is always the same, which is beneficial to simplifying the patterning process of the first electrode layer; in other embodiments, the two may be spaced apart unequally to reduce the effects of diffraction. In this embodiment, since the gap between the first electrode group 20A and the first electrode group 20B is not a straight line, it is advantageous to further reduce diffraction.
Optionally, in this embodiment, each first electrode 21 includes one electrode block 211, and in this embodiment, the first electrode 21 may be understood as a monolithic electrode block. Each electrode block 211 corresponds to a plurality of light emitting structures 31, so that the electrode blocks 211 corresponding to a plurality of light emitting structures can be driven by the same driving circuit, thereby simplifying the structure of the driving circuit and reducing the cost.
In this embodiment, the projection of the electrode block 211 on the substrate is gourd-shaped, and the projection of the light emitting structure on the substrate 1 is circular. The gourd shape can be understood as: the shape of the electrode block 211 that alternately increases and decreases in size in the extending direction (i.e., the extending direction of the first electrode 21, i.e., the second direction Y) is similar to the shape of a gourd, and the gourd shape here corresponds to the shape of one or more gourds connected end to end and connected in series. The projection of the light emitting structure on the substrate 1 may be a circle (as shown in fig. 4), or may be a square (as shown in fig. 5), and in other embodiments, the projection may also be an ellipse or a dumbbell, which is not described in detail.
In another embodiment, referring to fig. 6, each first electrode group includes a first electrode 22, the first electrode 22 includes a plurality of electrode blocks 221 and a connecting portion 222 connecting adjacent electrode blocks, and the connecting portion 222 may be formed on the same layer as the first electrode 22 or may be a connecting line routed through other film layers. Each first electrode block 221 corresponds to one light emitting structure 31, and the projections of the electrode blocks 221 on the substrate 1 are circular. Of course, in other embodiments, the projection of the electrode block 221 on the substrate 1 may also be circular, square, oval, etc. The structure other than the connection portion is substantially the same as that of the embodiment shown in fig. 5, and will not be described in detail.
Referring to fig. 7, in an embodiment, projections of the first electrode layer and the light emitting structure layer on the substrate are shown, the first electrode layer includes a plurality of first electrode groups 23 arranged along a first direction X1, and the first electrode groups 23 extend along a second direction Y1. It should be noted that the first direction X1 and the second direction Y1 are different from the first direction X and the second direction Y in the above embodiments.
In the present embodiment, each first electrode group 23 includes two first electrodes 24, and in other embodiments, the first electrode group 23 may include a plurality of first electrodes 24. The first electrodes 24 extend along the second direction Y1, and the first electrode group 23 also extends along the second direction Y1. Each of the first electrodes 24 includes a plurality of electrode blocks 241 and a connection portion 242 connecting adjacent electrode blocks 241, and the connection portion 242 connects electrode blocks of different first electrodes (e.g., the first electrode 24A and the first electrode 24B). Each first electrode 24 corresponds to a plurality of light emitting structures, each electrode block 241 corresponds to one light emitting structure, the light emitting structures corresponding to the same first electrode 24 are of the same color, and the light emitting structures corresponding to the same first electrode group 23 are of the same color.
Referring to fig. 7, in the first direction X1, the first electrodes of two adjacent first electrode groups are staggered, for example, the first electrodes 24B of the first electrode group 23A and the first electrodes 24C of the second electrode group 23B are staggered, and in the first direction X1, the distance between the first electrode groups (for example, the first electrodes 24B and the first electrodes 24E) corresponding to two adjacent light emitting structures of the same color is reduced, and correspondingly, the distance between the adjacent light emitting structures of the same color is also reduced, so that when the transparent OLED substrate displays a single color, the vertical stripes between the light emitting structures of the same color corresponding to the adjacent first electrode groups are reduced or eliminated. Alternatively, in the first direction X1, adjacent first electrodes are staggered from each other, for example, the first electrode 24B and the first electrode 24C, by a distance 1.5 times the width of the first electrode 24B (or 24C). The first electrode 24B and the first electrode 24A are aligned in the first direction in the prior art, and the first electrode 24B and the first electrode 24A are located at the position shown in fig. 7 in this embodiment, so the offset distance is 1.5 times the width of the first electrode.
Due to the staggered arrangement of the first electrodes (e.g., the first electrode 24B and the first electrode 24C) of the two first electrode groups, the distance between the first electrode 24B of the corresponding first electrode group 23A and the first electrode 24E of the first electrode group 23C is correspondingly reduced, the distance between the red pixel 32 corresponding to the first electrode 24B and the red pixel 33 corresponding to the first electrode 24E is also correspondingly reduced, and when the transparent OLED substrate displays a single color, the stripes of the red pixel 32 and the red pixel 33 are reduced or eliminated. In this embodiment, the central axis of the first electrode group is located between the two first electrodes. The distance between the central axis L4 of the first electrode group 23A and the central axis L5 of the first electrode group 23B is d1, the distance between the central axis L4 of the first electrode group 23A and the central axis L6 of the first electrode group 23C is less than 3 × d1, corresponding to the analogy, the distance between the central axes of the first electrode groups corresponding to two adjacent light-emitting structures of the same color is less than n × d1, and n is the number of colors of the light-emitting structures.
In addition, the present application further provides an array substrate, which includes a first OLED substrate a and a second OLED substrate B, wherein the second OLED substrate B at least partially surrounds the first OLED substrate a. The first OLED substrate a includes the transparent OLED substrate as described above, the second OLED substrate B is a non-transparent substrate, the first OLED substrate a is, for example, a PMOLED substrate, and the second OLED substrate B is, for example, an AMOLED substrate. The first OLED substrate A is round, square, drop-shaped and the like, and the second OLED substrate B can be rectangular, rounded rectangle, round and the like.
Referring to fig. 8, the second OLED substrate B includes a substrate, a third electrode layer 7 formed on the substrate, a light emitting layer 8 formed on the third electrode layer, and a fourth electrode layer 9 formed on the light emitting layer 8, and of course, the second OLED substrate B further includes a driving circuit layer, a pixel defining layer, and the like. In this embodiment, the third electrode layer 7 is an anode layer, and the fourth electrode layer 9 is a cathode layer. The first OLED substrate and the second OLED substrate share the substrate 1, and the light emitting structure layer 3 of the first OLED substrate and the light emitting layer 8 of the second OLED substrate are formed in the same process step, namely the light emitting structure layer of the first OLED substrate and the light emitting layer of the second OLED substrate can share one mask, so that the production process is simplified, and the cost is reduced. The thickness of the second electrode layer 4 is smaller than that of the fourth electrode layer 9, so that the light transmittance of the first OLED substrate is improved.
In one embodiment the material of the fourth electrode layer 9 comprises at least one of magnesium, silver. Optionally, the fourth electrode layer 9 is made of magnesium and silver, and a ratio of the mass of the magnesium to the mass of the silver is 1: 4-1: 20.
Referring to fig. 9, in an embodiment, the array substrate further includes a transition region C located between the first OLED substrate a and the second OLED substrate B, where the transition region C is a non-transparent region and is provided with a data line and a driving circuit, and the plurality of first electrodes of the same first electrode group are all connected to the same driving circuit, or the plurality of first electrodes of the same first electrode group are connected to different driving circuits. The plurality of first electrodes are all connected with the same driving circuit, so that the number of the driving circuits is reduced, and the manufacturing cost is reduced. Because the driving circuit of the first electrode is arranged in the transition region, the light transmittance of the first OLED substrate A is not affected.
The transition region C at least partially surrounds the first OLED substrate. If the first OLED substrate a is located at the edge of the entire array substrate, the at least partial enclosure may be understood as partial enclosure; if the first OLED substrate a is located at a non-edge position of the array substrate, the at least partial surrounding may be understood as a complete surrounding.
In one embodiment, the first direction X1 is a column direction, the second direction Y1 is a row direction, the row direction is a scan line direction of the first OLED substrate a, the column direction is a data line direction of the first OLED substrate a, and the scan lines and the data lines are disposed in the first transition region to avoid affecting light transmittance when disposed on the first OLED substrate. Of course, the row direction and the column direction may be interchanged according to the setting requirements of the pixels.
Due to the fact that the first electrodes of the two adjacent first electrode groups are arranged in a staggered mode, the distance between the adjacent first electrodes and the adjacent light-emitting structures is reduced, the distance between the adjacent light-emitting structures of the same color is reduced, when the transparent OLED substrate displays a single color, stripes between the light-emitting structures of the same color corresponding to the adjacent first electrode groups are reduced or eliminated, and therefore the display effect of the array substrate is improved.
The application also provides a display screen, the display screen includes transparent OLED base plate (or first OLED base plate) and carry out the first encapsulation layer 11 of encapsulation to transparent OLED base plate. Photosensitive devices such as cameras and sensors can be arranged below the transparent OLED substrate, external light can be collected through the transparent OLED substrate, and the performance of the photosensitive devices is guaranteed while the display function is achieved.
The present application further provides a display screen, please refer to fig. 11, which includes the array substrate and the package layer for packaging the array substrate as described above, and the package layer 10 includes the first package layer 11. The area corresponding to the first OLED substrate A is a transparent display area, the area corresponding to the second OLED substrate B is a non-transparent display area, optionally, the transparent display area corresponds to a PMOLED screen, and the non-transparent display area is an AMOLED screen. Photosensitive devices such as cameras and sensors can be arranged below the PMOLED screen, external light can be collected through the transparent PMOLED screen, and the performance of the photosensitive devices is guaranteed while the display function is achieved through the display screen.
The application also provides a display device, which comprises an equipment main body D and a display screen covering the equipment main body, such as the display screen shown in fig. 11. The display device can be a mobile phone, a tablet personal computer, a notebook computer and other equipment, and takes the mobile phone as an example, the equipment main body can comprise a shell, a circuit board, a battery, a processor and other elements, the equipment main body is also provided with a device area E, the device area E is positioned below the PMOLED screen (or a first OLED substrate), and a photosensitive device for collecting light through the PMOLED screen (or the first OLED substrate) is arranged in the device area E. When the transparent OLED substrate displays a single color, the stripes between the light-emitting structures with the same color corresponding to the adjacent first electrode groups are reduced or eliminated through the staggered arrangement of the first electrodes of the adjacent first electrode groups, the display effect of the first OLED substrate is improved, meanwhile, the enough light transmittance of the first OLED substrate is ensured, the photosensitive device is ensured to receive enough light, and therefore the performance of the photosensitive device is improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (18)

1. A transparent OLED substrate characterized by: the transparent OLED substrate includes: a substrate, a first electrode layer on the substrate, a light emitting structure layer on the first electrode layer, a second electrode layer on the light emitting structure layer,
the first electrode layer comprises a plurality of first electrode groups arranged along a first direction, one first electrode group comprises at least one first electrode, the extending directions of the first electrodes in the same first electrode group are the same, and the first electrode groups extend along a second direction;
the light emitting structure layer comprises light emitting structures of n colors, at least one light emitting structure is arranged on each first electrode, the light emitting structures corresponding to the same first electrode are of the same color, the first electrodes of two adjacent first electrode groups are arranged in a staggered mode in the first direction, the distance between the central axes of the two adjacent first electrode groups is d, the distance between the central axes of the first electrode groups corresponding to the light emitting structures of the same color is smaller than n d in the first direction, and the central axes of the first electrode groups are the same as the extending direction of the first electrodes.
2. The transparent OLED substrate of claim 1, wherein: the first direction is perpendicular to a second direction, the second direction is a length direction of the first electrode, and the first direction is a width direction of the first electrode.
3. The transparent OLED substrate of claim 1, wherein: the first electrode group comprises one first electrode, the first electrode comprises one electrode block, and a plurality of light-emitting structures are arranged on each electrode block.
4. The transparent OLED substrate of claim 1, wherein: the first electrode comprises a plurality of electrode blocks, each electrode block is provided with a light-emitting structure, and the first electrode comprises a connecting part for connecting two adjacent electrode blocks.
5. The transparent OLED substrate of claim 3 or 4, wherein: the projection of the electrode block on the substrate is in a circular shape, a square shape, an oval shape or a gourd shape.
6. The transparent OLED substrate of claim 3 or 4, wherein: in the first direction, the adjacent first electrodes are staggered from each other by a distance which is 0.5 times or 1.5 times the width of the first electrodes.
7. The transparent OLED substrate of claim 1, wherein: the first electrode group comprises a plurality of first electrodes, and the colors of the light emitting structures on the first electrodes of one first electrode group are the same;
preferably, the plurality of first electrodes in the same first electrode group are electrically connected.
8. The transparent OLED substrate of claim 1, wherein: the light emitting structures corresponding to the first electrodes of the two adjacent first electrode groups are arranged in a staggered manner;
preferably, the projection of the light emitting structure on the substrate is circular, elliptical or dumbbell-shaped.
9. The transparent OLED substrate of claim 1, wherein: two adjacent first electrode groups are spaced from each other and the distance is always equal or unequal.
10. The transparent OLED substrate of claim 1, wherein: the transparent OLED substrate comprises a pixel defining layer formed on a first electrode layer, the pixel defining layer is provided with a pixel opening, the light emitting structure is formed in the pixel opening, and the pixel defining layer is made of a transparent material;
or the transparent OLED substrate is not provided with a pixel defining layer.
11. The transparent OLED substrate of claim 1, wherein: the second electrode layer comprises a second electrode which is a face electrode;
preferably, when the thickness of the second electrode layer is more than 100 angstroms, the second electrode layer is entirely continuous, and the transparency is more than 40%;
preferably, when the thickness of the second electrode layer is more than 50 angstroms, the second electrode layer is continuous as a whole, and the transparency is more than 50%;
preferably, the first electrode and the second electrode are made of a transparent material;
preferably, the light transmittance of the first electrode and the second electrode is not less than 90%;
preferably, the transparent material comprises indium tin oxide, indium zinc oxide, silver doped indium tin oxide, silver doped indium zinc oxide, a mixture of magnesium, silver, aluminium or silver doped indium tin oxide.
12. An array substrate, comprising a first OLED substrate and a second OLED substrate, wherein the first OLED substrate comprises the transparent OLED substrate of any one of claims 1-11, the second OLED substrate is a non-transparent substrate, and the first OLED substrate and the second OLED substrate share a substrate;
preferably, the second OLED substrate at least partially surrounds the first OLED substrate;
preferably, the first OLED substrate is a PMOLED substrate, and the second OLED substrate is an AMOLED substrate.
13. The array substrate of claim 12, wherein: the array substrate comprises a transition area positioned between a first OLED substrate and a second OLED substrate, and the transition area is provided with a data line and a driving circuit;
preferably, the driving circuit has a 7T1C structure;
preferably, the first direction is a row direction or a column direction, and the second direction is a column direction or a row direction;
preferably, the plurality of first electrodes of the same first electrode group are all connected to the same driving circuit, or the plurality of first electrodes of the same first electrode group are connected to different driving circuits.
Preferably, the transition region is a non-transparent region;
preferably, the second OLED substrate at least partially surrounds the transition region, which at least partially surrounds the first OLED substrate.
14. The array substrate of claim 12, wherein: the first OLED substrate is in a drop shape, a rectangular shape or a circular shape.
15. The array substrate of claim 12, wherein: the second OLED substrate comprises a third electrode layer formed on the substrate, a light emitting layer formed on the third electrode layer and a fourth electrode layer formed on the light emitting layer, and the thickness of the fourth electrode layer is smaller than that of the second electrode layer;
preferably, the material of the fourth electrode layer includes at least one of magnesium and silver;
preferably, the ratio of the mass of magnesium to the mass of silver is 1:4 to 1: 20.
Preferably, the light emitting layer of the first OLED substrate and the light emitting layer of the second OLED substrate are formed in the same process step.
16. A display screen comprising the transparent OLED substrate of claims 1-11.
17. A display screen comprising the array substrate of claims 12 to 15.
18. A display device, characterized in that the display device comprises:
an apparatus body having a device region;
a display screen as claimed in claim 16 or 17 overlaid on the device 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.
CN201811627641.4A 2018-12-28 2018-12-28 Transparent OLED substrate, array substrate, display screen and display device Pending CN110767830A (en)

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