CN110690261B - Array substrate, manufacturing method and display panel - Google Patents
Array substrate, manufacturing method and display panel Download PDFInfo
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- CN110690261B CN110690261B CN201910973243.6A CN201910973243A CN110690261B CN 110690261 B CN110690261 B CN 110690261B CN 201910973243 A CN201910973243 A CN 201910973243A CN 110690261 B CN110690261 B CN 110690261B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
Abstract
The invention discloses an array substrate, a manufacturing method and a display panel, wherein the array substrate comprises a display area and a camera area under a screen, and the display area comprises a plurality of active driving type organic light emitting diode units which are arranged in an array; and the under-screen camera area comprises a plurality of passive driving type organic light emitting diode units which are arranged in an array. The embodiment provided by the invention can reduce the area of the non-display area of the camera area under the screen, effectively improve the user experience and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of display, in particular to an array substrate, a manufacturing method and a display panel.
Background
In recent years, the overall screen technology is rapidly developed, higher screen occupation ratio is pursued, the arrangement of the front camera is a problem to be solved, and in the prior art, a 'Liuhai' special-shaped screen is usually adopted for the front camera, namely, the upper part of the screen is removed and the camera is hidden, such as a 'beauty tip', and the like. However, how to improve the screen ratio becomes a hot issue of current research.
Disclosure of Invention
In order to solve at least one of the above problems, a first aspect of the present invention provides an array substrate, including a display area and an under-screen camera area,
the display area comprises a plurality of active driving type organic light emitting diode units arranged in an array; and
the under-screen camera area comprises a plurality of passive driving type organic light emitting diode units which are arranged in an array mode.
Further, the active driving type organic light emitting diode unit includes:
the driving thin film transistor is used for driving the first organic light emitting diode to emit light, wherein the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode electrode of the first light emitting diode;
the passively driven organic light emitting diode unit includes:
and the anode of the second organic light emitting diode is electrically connected with the data signal line corresponding to the first light emitting diode in the same column.
Furthermore, the array substrate further comprises connecting metals which are arranged on the same layer as the source electrode and the drain electrode of the driving thin film transistor and correspond to the anodes of the second organic light emitting diodes;
The anode of the second organic light emitting diode is connected with corresponding connecting metal through a through hole, and the source electrode or the drain electrode of the driving thin film transistor connected with the anode of the first organic light emitting diode adjacent to the column of the second organic light emitting diode is connected through the connecting metal;
and/or
The anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the anode of the second organic light emitting diode which is adjacent to the column to which the second organic light emitting diode belongs and is connected with the corresponding connecting metal through the via hole is connected through the connecting metal.
Further, the passively driven organic light emitting diode unit further includes:
the isolation column is positioned between the second organic light emitting diodes and used for isolating the cathode;
or
And a defining part for separating the cathodes and located between the second organic light emitting diodes.
Further, the passively driven organic light emitting diode unit further includes a first switching thin film transistor corresponding to each row of the second organic light emitting diodes, wherein
And the grid electrode of the first switching thin film transistor is connected with a grid electrode signal line corresponding to the first organic light emitting diode of the row, one of the source electrode and the drain electrode of the first switching thin film transistor is connected with the cathode electrode of the second organic light emitting diode of the row, and the other of the source electrode and the drain electrode of the first switching thin film transistor is connected with a power supply signal of the cathode electrode of the second organic light emitting diode.
In a further aspect of the present invention,
the area of the under-screen camera is annular, and the passive driving type organic light emitting diode unit comprises a second organic light emitting diode which surrounds the camera in an annular shape;
or alternatively
The camera area is rectangular under the screen, and the passive driving type organic light emitting diode unit comprises second organic light emitting diodes which are arranged in a rectangular array and surround the camera.
Furthermore, the area of the camera under the screen further comprises a wiring area which is located on the side, away from the light-emitting side, of the passive driving type organic light-emitting diode unit, and the wiring area comprises a grid signal line and a data signal line.
Further, the display device comprises a first organic light emitting diode located in the display area, a driving thin film transistor corresponding to the first organic light emitting diode one by one, and a second organic light emitting diode located in the under-screen camera area, wherein:
the display area includes:
a gate electrode and an active layer formed on the substrate;
a source electrode and a drain electrode electrically connected to the active layer;
a planarization layer covering the source and drain electrodes;
an anode of a first organic light emitting diode formed on the planarization layer, the anode being electrically connected to one of the source and drain electrodes;
An organic light emitting layer of a first organic light emitting diode formed on the anode;
a cathode of a first organic light emitting diode formed on the organic light emitting layer;
the under-screen camera area includes:
the through hole penetrates through the array substrate and is used for arranging a camera under a screen, and the grid signal wire which surrounds the through hole and is arranged on the same layer as the grid;
the data signal line is arranged on the same layer as the source electrode and the drain electrode;
the anode of the second organic light-emitting diode is arranged on the same layer as the anode of the first organic light-emitting diode;
the organic light emitting layer of the second organic light emitting diode is arranged at the same layer as the organic light emitting layer of the first organic light emitting diode;
the cathode of the second organic light-emitting diode is arranged at the same layer as the cathode of the first organic light-emitting diode;
an encapsulation layer covering the cathode of the first organic light emitting diode and the cathode of the second organic light emitting diode;
and the cover plate covers the packaging layer.
Further, the active driving type organic light emitting diode unit includes:
the driving thin film transistor is used for driving the first organic light emitting diode to emit light, wherein the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode electrode of the first light emitting diode;
The passively driven organic light emitting diode unit includes:
and the anode of the second organic light-emitting diode is electrically connected with the grid signal line corresponding to the first light-emitting diode in the same row.
Furthermore, the array substrate further comprises a connecting metal which is arranged on the same layer as the grid electrode of the driving thin film transistor and corresponds to the anode of each second organic light-emitting diode;
the anode of the second organic light emitting diode is connected with corresponding connecting metal through a through hole, and the grid electrode of the driving thin film transistor connected with the anode of the adjacent first organic light emitting diode in the row to which the second organic light emitting diode belongs is connected through the connecting metal;
and/or
The anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the anode of the second organic light emitting diode which is adjacent to the row of the second organic light emitting diode and is connected with the corresponding connecting metal through the via hole is connected through the connecting metal.
Further, the passively driven organic light emitting diode unit further includes:
the isolation column is positioned between the second organic light emitting diodes and used for isolating the cathode;
or
And a defining part for separating the cathodes and located between the second organic light emitting diodes.
Furthermore, each second organic light emitting diode of the passively-driven organic light emitting diode unit is electrically connected with the data signal line corresponding to the first organic light emitting diode in the same column.
A second aspect of the present invention provides a display panel, including the array substrate of the first aspect.
The third aspect of the present invention provides a method for manufacturing an array substrate, including:
forming a grid electrode and an active layer of a driving thin film transistor on a substrate, and forming a grid electrode signal line which is arranged on the same layer as the grid electrode;
forming a source electrode and a drain electrode which are electrically connected with the active layer, and forming a data signal line which is arranged at the same layer as the source electrode and the drain electrode;
forming a planarization layer covering the source electrode, the drain electrode and the data signal line;
forming a via hole penetrating to the source electrode or the drain electrode on the planarization layer;
forming an anode of a first organic light emitting diode and an anode of a second organic light emitting diode around a camera through hole area to be formed on the planarization layer, wherein the anode of the first organic light emitting diode is electrically connected with a corresponding source electrode or drain electrode through the through hole;
forming a cathode covering the light emitting layer of the first organic light emitting diode and the light emitting layer of the second organic light emitting diode;
Forming a camera through hole penetrating to the substrate;
forming a packaging layer covering the cathode and the camera through hole;
and forming a cover plate covering the packaging layer.
The invention has the following beneficial effects:
aiming at the existing problems, the array substrate, the manufacturing method and the display panel are formulated, and the passive driving type organic light emitting diode unit arranged in the under-screen camera area can reduce the non-display area of the under-screen camera area, improve the display effect, effectively improve the user experience and have wide application prospects.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a display panel including an off-screen camera in the prior art;
FIG. 2 is a schematic structural diagram of a through hole of an under-screen camera in the prior art;
fig. 3 is a schematic structural diagram of an array substrate according to an embodiment of the invention;
fig. 4 is a schematic view illustrating a layer structure of the array substrate according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a column common anode of the array substrate according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a row common cathode of the array substrate according to an embodiment of the invention;
FIG. 7 is a schematic diagram illustrating the structure of the under-screen camera area according to one embodiment of the present invention;
FIG. 8 is a schematic view of the structure of an area of an off-screen camera according to another embodiment of the present invention;
fig. 9 is a flowchart illustrating a method for manufacturing an array substrate according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the prior art, a scheme adopted by a hidden screen camera is to dig a hole in a display area to place the camera, as shown in fig. 1, however, when a through hole or a blind hole is formed in the display area, a certain distance is usually reserved between the inner wall of the hole 12 and the boundary of the display area 20, and a component for preventing crack diffusion, routing and the like are arranged in the area 10, especially more routing is arranged around the hole, as shown in fig. 2, the diameter of the hole is increased, the area occupied by the routing 31 and the routing 32 is greatly increased along with the increase of the diameter of the hole, and the area 10 is not displayed, so that the hole looks dazzling in the whole screen, and the attractiveness of the screen is affected.
Organic electroluminescent diodes (OLEDs) have advantages of low power consumption, light weight, thin thickness, foldability, etc., and may be classified into active driving type organic light emitting diodes (AMOLEDs) and passive driving type organic light emitting diodes (PMOLEDs). The active driving type organic electroluminescent diode AMOLED can realize large-size display by driving through a Thin Film Transistor (TFT), has the characteristics of power saving, high resolution and the like, is complex in preparation process, and particularly has high requirement on the stability of the thin film transistor; the passive driving type organic light emitting diode PMOLED has the characteristics of simple manufacturing process and simple structure, but large-size realization is difficult.
In view of the problems in the prior art that a large number of data signal lines and gate signal lines exist in a non-display area, and a driving thin film transistor for driving an active-driving organic light emitting diode cannot be arranged in the non-display area, the inventor of the present application has developed and tested a large number of novel array substrates to solve the problems according to the characteristics of the active-driving organic light emitting diode and the passive-driving organic light emitting diode.
As shown in fig. 3, an embodiment of the present invention provides an array substrate, including a display area 20 and an off-screen camera area 10, where the display area 20 includes a plurality of active driving organic light emitting diode units arranged in an array; and the under-screen camera area 10 includes a plurality of passively driven organic light emitting diode units arranged in an array.
In a specific example, as shown in fig. 3 and 4, the array substrate includes a display area and a non-display area of the under-screen camera area, and the array substrate includes a plurality of actively-driven organic light emitting diode units arranged in an array in the display area, and includes a plurality of passively-driven organic light emitting diode units arranged in an array in the under-screen camera area. The active-driving type organic light emitting diode unit includes: the light-emitting diode comprises a first organic light-emitting diode and a driving thin film transistor for driving the first organic light-emitting diode to emit light, wherein the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode of the first light-emitting diode. The passively driven organic light emitting diode unit includes: and the anode of the second organic light-emitting diode is electrically connected with the data signal line corresponding to the first light-emitting diode in the same column.
Specifically, the array substrate comprises a first organic light emitting diode 21, a driving thin film transistor 22 corresponding to the first organic light emitting diode 21 one by one, a second organic light emitting diode 11 located in the camera area under the screen, and a wiring area located on the light emitting side far away from the second organic light emitting diode 11, wherein the wiring area comprises a grid signal line and a data signal line.
The method specifically comprises the following steps: a substrate 201; a buffer layer 202 covering the substrate 201; the driving thin film transistor 22 is included in the display region, and includes: an active layer 221 formed on the buffer layer 202, an interlayer dielectric layer 203 covering the active layer 221, a gate electrode 222 formed on the interlayer dielectric layer and a gate insulating layer covering the gate electrode 222, and source and drain electrodes 223 formed on the gate insulating layer, the source and drain electrodes being electrically connected to the active layer through via holes.
The non-display region includes a gate signal line 31 disposed on the same layer as the gate 222 of the driving transistor, and a data signal line 32 disposed on the same layer as the source and drain 223 of the driving transistor.
And a planarization layer 204 covering the source, drain and data signal lines of the driving transistor.
An anode 211 of the first organic light emitting diode 21 of the display region formed on the planarization layer 204 and an anode 111 of the second organic light emitting diode 11 of the non-display region formed on the planarization layer 204 are disposed in the same layer and formed by the same patterning process, the anode 211 of the first organic light emitting diode 21 is electrically connected to one of a source or a drain 223 of the driving thin film transistor 22 through a via hole penetrating the planarization layer 204, and the anode 111 of the second organic light emitting diode 11 is electrically connected to the data signal line 32 through a via hole penetrating the planarization layer 204.
A pixel defining layer 205 is formed on the planarization layer 204, the anode 211 of the first organic light emitting diode 21, and the anode 111 of the second organic light emitting diode 11.
The light emitting layer 212 of the first organic light emitting diode 21 is formed on the anode 211 of the first organic light emitting diode 21 and the region surrounded by the pixel defining layer 205, the light emitting layer 112 of the second organic light emitting diode 11 is formed on the anode 111 of the second organic light emitting diode 11 and the region surrounded by the pixel defining layer 205, and the light emitting layer 212 of the first organic light emitting diode 21 and the light emitting layer 112 of the second organic light emitting diode 11 are arranged in the same layer and are formed by using the same patterning process.
And forming a cathode covering the pixel defining layer 205, the light emitting layer 212 of the first organic light emitting diode 21 and the light emitting layer 112 of the second organic light emitting diode 11, wherein the cathode is of an integral structure and comprises a cathode 213 covering the light emitting layer 212 of the first organic light emitting diode 21 and a cathode 113 covering the light emitting layer 112 of the second organic light emitting diode 11, wherein the cathode 213 of the first organic light emitting diode 21 is loaded with a power supply signal, the anode 211 is loaded with a voltage signal of a data signal line under the driving of the driving thin film transistor and emits light, and the second organic light emitting diode 11 is driven to emit light by the power supply signals loaded on the cathode 113 and the anode 111 thereof.
An encapsulation layer 206 covering the cathode 213 of the first organic light emitting diode 21 and the cathode 113 of the second organic light emitting diode 11, and a cap plate 207 formed on the encapsulation layer 206 are formed.
In an alternative embodiment, as shown in fig. 5, the anodes of the second organic light emitting diodes 11 in the same column in the passively driven organic light emitting diode unit are connected to the corresponding data signal lines of the first organic light emitting diodes 21 in the column, that is, the passively driven organic light emitting diode unit is a column common anode.
In this embodiment, the second organic light emitting diode and the first organic light emitting diode display unit in the same column in the area of the under-screen camera are commonly connected to a data signal line, so as to save the number of data signal lines.
In an optional embodiment, the array substrate further includes a connection metal disposed on the same layer as the source and the drain of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes; the anode of the second organic light emitting diode is connected with corresponding connecting metal through a through hole, and the source electrode or the drain electrode of the driving thin film transistor connected with the anode of the first organic light emitting diode display unit adjacent to the column to which the second organic light emitting diode belongs is connected through the connecting metal.
In this embodiment, the second organic light emitting diode is adjacent to the first organic light emitting diode in the same column. The connecting metal and the source electrode and the drain electrode of the driving thin film transistor are arranged on the same layer, the anode of the second organic light emitting diode is electrically connected with the connecting metal through a through hole penetrating through the planarization layer, the anode of the first organic light emitting diode is electrically connected with one of the source electrode or the drain electrode through a through hole penetrating through the planarization layer, and one of the source electrode or the drain electrode is electrically connected with the connecting metal, so that the anodes of the second organic light emitting diodes in the same column are electrically connected with the anodes of the first organic light emitting diodes in the same column.
In another optional embodiment, the array substrate further includes a connection metal disposed on the same layer as the source and drain electrodes of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes; the anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the anode of the second organic light emitting diode which is adjacent to the column to which the second organic light emitting diode belongs and is connected with the corresponding connecting metal through the via hole is connected through the connecting metal.
In this embodiment, the second organic light emitting diode is adjacent to the second organic light emitting diode in the same column. The connecting metal and the source electrode and the drain electrode of the driving thin film transistor are arranged in the same layer, the anodes of the second organic light emitting diodes are electrically connected with the corresponding connecting metal through via holes penetrating through the planarization layer, the anodes of the other second organic light emitting diodes adjacent to the same column are also electrically connected with the corresponding connecting metal through via holes penetrating through the planarization layer, namely the anodes of the two second organic light emitting diodes adjacent to the same column are electrically connected through the corresponding connecting metal, so that the anodes of the two or more second organic light emitting diodes in the same column are electrically connected.
When the passive driving type organic light emitting diode unit is a column common anode, the cathode of each second organic light emitting diode of the passive driving type organic light emitting diode unit can be controlled by a power signal respectively loaded on the cathode, and other control modes can also be adopted.
Considering that the cathodes of the second organic light emitting diodes need to be controlled separately, in an alternative embodiment, the passively-driven organic light emitting diode unit further includes an isolation pillar for isolating the cathodes between the second organic light emitting diodes.
In this embodiment, after the array substrate forms the light emitting layer of the first organic light emitting diode and the light emitting layer of the second organic light emitting diode, an isolation pillar is formed between the second organic light emitting diodes on the pixel defining layer, and the isolation pillar is used for isolating the cathode of each second organic light emitting diode in the passive driving organic light emitting diode unit, so as to implement individual control of each second organic light emitting diode.
Considering that the cathodes of the second organic light emitting diodes need to be controlled individually, in another alternative embodiment, the passively-driven organic light emitting diode unit further includes a defining portion for isolating the cathodes between the second organic light emitting diodes.
In this embodiment, after the array substrate forms cathodes covering the pixel defining layer 205, the light emitting layer 212 of the first organic light emitting diode 21, and the light emitting layer 112 of the second organic light emitting diode 11, the cathodes are patterned to form via holes between the second organic light emitting diodes, and then when an encapsulation layer 206 covering the cathode 213 of the first organic light emitting diode 21 and the cathode 113 of the second organic light emitting diode 11 is formed, the encapsulation layer forms a defining portion for separating the cathodes at the via holes, thereby implementing individual control of the cathodes of the second organic light emitting diodes.
On the basis of the common anode of the passive driving type organic light emitting diode unit column, the cathode of each second organic light emitting diode in the same row is controlled by the common cathode of the row, in an alternative embodiment, as shown in fig. 6, the passive driving type organic light emitting diode unit further includes a first switching thin film transistor K1 corresponding to the second organic light emitting diode 11 in each row, wherein the gate of the first switching thin film transistor K1 is connected to the gate signal line corresponding to the first organic light emitting diode in the row, one of the source and the drain of the first switching thin film transistor K1 is connected to the cathode of the second organic light emitting diode in the row, and the other of the source and the drain of the first switching thin film transistor K1 is connected to the power signal VSS of the cathode of the second organic light emitting diode.
In this embodiment, the gate driving circuit of the array substrate outputs a gate signal, the passively-driven organic light emitting diode unit is provided with a first switching thin film transistor in each row, a gate of the first switching thin film transistor is connected to the gate signal output by the gate driving circuit, one of a source or a drain is connected to a cathode power source VSS of the second organic light emitting diode, and the other of the source or the drain is connected to a cathode of the second organic light emitting diode in the row. And when the grid drive circuit outputs a grid signal, the first switch thin film transistor is turned on, the cathode power supply VSS of the second organic light emitting diode is loaded to the cathode of the second organic light emitting diode of the row, so that the row common cathode of the passive drive type organic light emitting diode unit is realized, and the switch thin film transistor drives the second organic light emitting diode to emit light by utilizing the grid signal output by the grid drive circuit based on the fact that the anode of the second organic light emitting diode is connected to the data signal line of the column to which the second organic light emitting diode belongs. That is, when the gate signal line of the row is active, the first organic light emitting diode of the row emits light according to the applied cathode power signal and the data signal voltage applied to the anode in response to the turn-on of the driving thin film transistor; the cathode of the second organic light emitting diode of the row emits light in response to the gate signal line-applied cathode power source VSS and the data signal voltage applied to the anode, thereby implementing lighting of the first organic light emitting diode of the display area of the row and the second organic light emitting diode of the under-screen camera area according to the gate signal of the row.
In an alternative embodiment, when the array substrate includes two sets of gate driving circuits in a row symmetry, the gate signal output by each gate driving circuit controls the second organic light emitting diode on the adjacent side of the row.
In this embodiment, the array substrate includes two sets of gate driving circuits, and the second organic light emitting diodes in the same row of the under-screen camera area are driven by the gate signals of the adjacent sides to emit light by the corresponding first switching thin film transistors.
In consideration of different shapes of the under-screen camera area, which is in a circular ring shape in one embodiment as shown in fig. 7, different passive driving organic light emitting diode units are respectively disposed, and the passive driving organic light emitting diode units include a second organic light emitting diode surrounding the camera in a circular ring shape.
In this embodiment, the area of the under-screen camera is circular, and taking a quarter of the passive-driven organic light emitting diode units as shown in fig. 7 as an example, the number of pixels of the second organic light emitting diodes 11 in each row of the passive-driven organic light emitting diode units is 3, 2, 1, respectively, that is, the passive-driven organic light emitting diode units are circular ring patterns surrounding the through holes of the under-screen camera.
In another embodiment, as shown in fig. 8, the area of the under-screen camera is rectangular, and the passive driving organic light emitting diode unit includes second organic light emitting diodes arranged in a rectangular array around the camera.
In this embodiment, the area of the under-screen camera is rectangular, and taking a quarter of the passively driven organic light emitting diode units as shown in fig. 8 as an example, the numbers of pixels of the second organic light emitting diodes 11 in each row of the passively driven organic light emitting diode units are respectively 8, 5, 3, 2, 1, that is, the passively driven organic light emitting diode units are rectangular patterns surrounding the through holes of the under-screen camera.
Corresponding to the array substrate provided in the foregoing embodiments, an embodiment of the present application further provides a manufacturing method of the array substrate, and since the manufacturing method provided in the embodiment of the present application corresponds to the array substrates provided in the foregoing embodiments, the foregoing embodiments are also applicable to the manufacturing method provided in the embodiment, and detailed description is not repeated in this embodiment.
As shown in fig. 9, an embodiment of the present application further provides a method for manufacturing the array substrate, including: forming a grid electrode and an active layer of a driving thin film transistor on a substrate, and forming a grid electrode signal line which is arranged on the same layer as the grid electrode; forming a source electrode and a drain electrode which are electrically connected with the active layer, and forming a data signal line which is arranged at the same layer as the source electrode and the drain electrode; forming a planarization layer covering the source electrode, the drain electrode and the data signal line; forming a via hole penetrating to the source electrode or the drain electrode on the planarization layer; forming an anode of a first organic light emitting diode and an anode of a second organic light emitting diode around a camera through hole area to be formed on the planarization layer, wherein the anode of the first organic light emitting diode is electrically connected with a corresponding source electrode or drain electrode through the through hole; forming a cathode covering the light emitting layer of the first organic light emitting diode and the light emitting layer of the second organic light emitting diode; forming a camera through hole penetrating to the substrate; forming a packaging layer covering the cathode and the camera through hole; and forming a cover plate covering the packaging layer.
It should be noted that the embodiments provided in the present application are not limited to the column common anode and the row common cathode, and the array substrate may also adopt the row common anode, and in an alternative embodiment, the active-driven organic light emitting diode unit includes: the driving thin film transistor is used for driving the first organic light emitting diode to emit light, wherein the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode electrode of the first light emitting diode; the passively driven organic light emitting diode unit includes: and the anode of the second organic light-emitting diode is electrically connected with the grid signal line corresponding to the first light-emitting diode in the same row.
In this embodiment, the second organic light emitting diode and the first organic light emitting diode located in the same row of the through hole of the under-screen camera are commonly connected to the gate signal line, so as to save the number of the gate signal lines. Based on the common row anode of the passively driven organic light emitting diode unit, the cathode of each second organic light emitting diode can be controlled by the power signal respectively loaded on the cathode, and other control modes can also be adopted. That is, the anode of the second organic light emitting diode in the same row is connected to the gate signal line of the first organic light emitting diode in the row to apply a power voltage to the anode of the second organic light emitting diode in the row, in other words, the anode voltage applied to the anode of the second organic light emitting diode is the gate signal for driving the first organic light emitting diode in the row to emit light.
In an optional embodiment, the array substrate further includes a connection metal disposed on the same layer as the gate of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes; the anodes of the second organic light emitting diodes are connected with corresponding connecting metals through via holes, and the connecting metals are connected with the grids of the driving thin film transistors connected with the anodes of the adjacent first organic light emitting diodes in the row to which the second organic light emitting diodes belong.
In this embodiment, the second organic light emitting diode is adjacent to the first organic light emitting diode in the same row. The connecting metal and the grid electrode of the driving thin film transistor are arranged on the same layer, the anode of the second organic light emitting diode is electrically connected with the connecting metal through a through hole penetrating through the planarization layer and the interlayer insulating layer, and the connecting metal is electrically connected with the grid electrode of the first organic light emitting diode on the same row, so that the anode of the second organic light emitting diode on the same row is electrically connected with the grid electrode of the driving thin film transistor corresponding to the first organic light emitting diode on the same row.
In another optional embodiment, the array substrate further includes a connection metal disposed on the same layer as the gate of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes; the anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the anode of the second organic light emitting diode which is adjacent to the row of the second organic light emitting diode and is connected with the corresponding connecting metal through the via hole is connected through the connecting metal.
In this embodiment, the second organic light emitting diode is adjacent to the second organic light emitting diode in the same row. The connection metal and the gate of the driving thin film transistor are arranged on the same layer, the anodes of the second organic light emitting diodes are electrically connected with the corresponding connection metal through via holes penetrating through the planarization layer and the interlayer insulating layer, the anodes of the other adjacent second organic light emitting diodes in the same row are also electrically connected with the corresponding connection metal through via holes penetrating through the planarization layer and the interlayer insulating layer, namely, the anodes of the two adjacent second organic light emitting diodes in the same row are electrically connected through the corresponding connection metal, so that the anodes of the two or more second organic light emitting diodes in the same row are electrically connected.
When the passive driving type organic light emitting diode unit is a common row anode, the cathode of each second organic light emitting diode of the passive driving type organic light emitting diode unit can be controlled by a power signal respectively loaded on the cathode, and other control modes can also be adopted.
In view of the fact that the cathodes of the second organic light emitting diodes need to be controlled individually, in an alternative embodiment, the passively driven organic light emitting diode unit further includes an isolation pillar for isolating the cathodes between the second organic light emitting diodes. The specific implementation of this embodiment is similar to the passive driving type organic light emitting diode unit being a column common anode, and is not described herein again.
Similarly, in another alternative embodiment, the passively driven oled unit further includes a defining portion for isolating the cathode between the second oleds. The specific implementation of this embodiment is similar to the passive driving type organic light emitting diode unit being a column common anode, and is not described herein again.
On the basis of the common anode of the rows of the passively driven organic light emitting diode units, the cathodes of the second organic light emitting diodes in the same column are controlled by using the common cathode of the columns.
In this embodiment, the gate driving circuit of the array substrate outputs a gate signal, the anode of each second organic light emitting diode of the row corresponding to the passive driving type organic light emitting diode unit loads the gate signal, and the cathode of each second organic light emitting diode is electrically connected to the data signal line corresponding to the first organic light emitting diode of the same column, so as to drive the second organic light emitting diode of the row to emit light. In other words, the anode of each second organic light emitting diode of the passively driven organic light emitting diode unit with the common anode in the row loads the gate signal corresponding to the first organic light emitting diode in the row, and the cathode of each second organic light emitting diode loads the data signal corresponding to the first organic light emitting diode in the same column, so as to drive each second organic light emitting diode of the passively driven organic light emitting diode unit to emit light.
Based on the array substrate, an embodiment of the present application further provides a display panel, which includes the array substrate. The display panel can be any product or component with a display function, such as a tablet personal computer, a television, a digital photo frame, a mobile phone and the like.
Aiming at the existing problems, the array substrate, the manufacturing method and the display panel are formulated, and the passive driving type organic light emitting diode unit arranged in the under-screen camera area can reduce the non-display area of the under-screen camera area, improve the display effect, effectively improve the user experience and have wide application prospects.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (12)
1. An array substrate comprises a display area and an under-screen camera area,
The display region includes a plurality of actively driven organic light emitting diode units arranged in an array, the actively driven organic light emitting diode units including: a first organic light emitting diode and a driving thin film transistor for driving the first organic light emitting diode to emit light,
wherein the display area further comprises:
a gate electrode and an active layer formed on the substrate;
a source electrode and a drain electrode electrically connected to the active layer;
a planarization layer covering the source and drain electrodes;
an anode of a first organic light emitting diode formed on the planarization layer, the anode being electrically connected to one of the source and drain electrodes;
an organic light emitting layer of a first organic light emitting diode formed on the anode;
a cathode of a first organic light emitting diode formed on the organic light emitting layer;
the under-screen camera area includes: the passive driving type organic light emitting diode device comprises a plurality of passive driving type organic light emitting diode units arranged in an array mode and a wiring area located on the side, far away from the light emitting side, of the passive driving type organic light emitting diode units, wherein the passive driving type organic light emitting diode units comprise second organic light emitting diodes, and the wiring area comprises grid signal lines and data signal lines;
The under-screen camera area further comprises:
a through hole penetrating the array substrate and used for arranging a camera under the screen,
the grid signal line is arranged around the through hole and at the same layer as the grid;
the data signal line is arranged on the same layer as the source electrode and the drain electrode;
the anode of the second organic light-emitting diode is arranged on the same layer as the anode of the first organic light-emitting diode;
the organic light emitting layer of the second organic light emitting diode is arranged at the same layer as the organic light emitting layer of the first organic light emitting diode;
the cathode of the second organic light-emitting diode is arranged at the same layer as the cathode of the first organic light-emitting diode;
an encapsulation layer covering the cathode of the first organic light emitting diode and the cathode of the second organic light emitting diode;
and the cover plate covers the packaging layer.
2. The array substrate of claim 1,
the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode of the first organic light-emitting diode;
And the anode of the second organic light-emitting diode is electrically connected with the data signal line corresponding to the first light-emitting diode in the same column.
3. The array substrate of claim 2, further comprising a connection metal disposed in the same layer as the source and drain of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes;
the anode of the second organic light emitting diode is connected with corresponding connecting metal through a through hole, and the source electrode or the drain electrode of the driving thin film transistor connected with the anode of the first organic light emitting diode adjacent to the column of the second organic light emitting diode is connected through the connecting metal;
and/or
The anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the anode of the second organic light emitting diode which is adjacent to the column to which the second organic light emitting diode belongs and is connected with the corresponding connecting metal through the via hole is connected through the connecting metal.
4. The array substrate of claim 2 or 3, wherein the passively driven OLED unit further comprises:
the isolation column is positioned between the second organic light emitting diodes and used for isolating the cathode;
or
And a defining part for separating the cathodes and located between the second organic light emitting diodes.
5. The array substrate of claim 4, wherein the passively-driven OLED units further comprise a first switching thin film transistor corresponding to each row of the second OLEDs, wherein
And the grid electrode of the first switching thin film transistor is connected with a grid electrode signal line corresponding to the first organic light emitting diode of the row, one of the source electrode and the drain electrode of the first switching thin film transistor is connected with the cathode electrode of the second organic light emitting diode of the row, and the other of the source electrode and the drain electrode of the first switching thin film transistor is connected with a power supply signal of the cathode electrode of the second organic light emitting diode.
6. The array substrate of claim 5,
the area of the under-screen camera is annular, and the passive driving type organic light emitting diode unit comprises a second organic light emitting diode which surrounds the camera in an annular shape;
or
The camera area is rectangular under the screen, and the passive driving type organic light emitting diode unit comprises second organic light emitting diodes which are arranged in a rectangular array and surround the camera.
7. The array substrate of claim 1,
The active-driving type organic light emitting diode unit includes:
the driving thin film transistor is used for driving the first organic light emitting diode to emit light, wherein the grid electrode of the driving thin film transistor is electrically connected with a corresponding grid electrode signal line, one of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with a corresponding data signal line, and the other of the source electrode and the drain electrode of the driving thin film transistor is electrically connected with the anode electrode of the first organic light emitting diode;
the passively driven organic light emitting diode unit includes:
and the anode of the second organic light-emitting diode is electrically connected with the grid signal line corresponding to the first light-emitting diode in the same row.
8. The array substrate of claim 7, further comprising a connection metal disposed on the same layer as the gate of the driving thin film transistor and corresponding to the anode of each of the second organic light emitting diodes;
the anode of the second organic light emitting diode is connected with corresponding connecting metal through a through hole, and the grid electrode of the driving thin film transistor connected with the anode of the adjacent first organic light emitting diode in the row to which the second organic light emitting diode belongs is connected through the connecting metal;
And/or
The anode of the second organic light emitting diode is connected with the corresponding connecting metal through the via hole, and the adjacent anode of the second organic light emitting diode in the row to which the second organic light emitting diode belongs is connected with the corresponding connecting metal through the connecting metal and the via hole.
9. The array substrate according to claim 7 or 8, wherein the passively-driven OLED unit further comprises:
the isolation columns are positioned among the second organic light-emitting diodes and used for isolating the cathodes;
or alternatively
And a defining part for separating the cathodes and located between the second organic light emitting diodes.
10. The array substrate of claim 9, wherein each second OLED of the passively-driven OLED unit is electrically connected to the corresponding data signal line of the first OLED in the same column.
11. A display panel comprising the array substrate according to any one of claims 1 to 10.
12. A manufacturing method of an array substrate is characterized by comprising the following steps:
forming a grid electrode and an active layer of a driving thin film transistor on a substrate, and forming a grid electrode signal line which is arranged on the same layer as the grid electrode;
Forming a source electrode and a drain electrode which are electrically connected with the active layer, and forming a data signal line which is arranged at the same layer as the source electrode and the drain electrode;
forming a planarization layer covering the source electrode, the drain electrode and the data signal line;
forming a via hole penetrating to the source electrode or the drain electrode on the planarization layer;
forming an anode of a first organic light emitting diode and an anode of a second organic light emitting diode around a camera through hole area to be formed on the planarization layer, wherein the anode of the first organic light emitting diode is electrically connected with a corresponding source electrode or drain electrode through the through hole;
forming a cathode covering the light emitting layer of the first organic light emitting diode and the light emitting layer of the second organic light emitting diode;
forming a camera through hole penetrating to the substrate;
forming a packaging layer covering the cathode and the camera through hole;
and forming a cover plate covering the packaging layer.
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| CN115136316A (en) | 2020-02-18 | 2022-09-30 | 谷歌有限责任公司 | Reducing aperture bezel area in a display |
| CN111405090A (en) * | 2020-03-18 | 2020-07-10 | Oppo广东移动通信有限公司 | Camera calling method of mobile equipment and mobile equipment |
| CN111584591B (en) * | 2020-05-22 | 2023-03-28 | 京东方科技集团股份有限公司 | Display panel, driving method and display device |
| CN111900186B (en) * | 2020-06-17 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| US20220310727A1 (en) * | 2020-09-24 | 2022-09-29 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel, display device and manufacturing method thereof |
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