CN110289294B - Display panel and manufacturing method thereof - Google Patents
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- CN110289294B CN110289294B CN201910569023.7A CN201910569023A CN110289294B CN 110289294 B CN110289294 B CN 110289294B CN 201910569023 A CN201910569023 A CN 201910569023A CN 110289294 B CN110289294 B CN 110289294B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000010410 layer Substances 0.000 claims abstract description 129
- 239000012044 organic layer Substances 0.000 claims abstract description 49
- 239000000758 substrate Substances 0.000 claims abstract description 39
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
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- 230000007547 defect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
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- 239000000243 solution Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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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
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Abstract
The invention discloses a display panel and a manufacturing method thereof.A conductive piece is arranged between a pixel definition layer and a first public organic layer, the pixel definition layer comprises a pixel defining wall and a plurality of pixel openings, the conductive piece is respectively contacted with the pixel definition layer and the first public organic layer, and at least overlaps with the pixel defining wall in the direction vertical to the plane of a substrate base plate. The conductive element can be used for reducing pollution of organic molecules in the first public organic layer to the pixel defining layer, when image display is carried out, carrier accumulation caused by organic molecule pollution on the surface of the area of the pixel defining layer covered by the conductive element can be avoided, residual images are reduced or even avoided, the conductive element has an equipotential characteristic, the area of the pixel defining layer covered by the conductive element can be enabled to be equipotential, the problem of carrier accumulation on the surface of the pixel defining layer of the area is completely avoided, and the residual images in the area are completely avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a manufacturing method thereof.
Background
With the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present. The main component of the electronic device that implements the display function is the display panel.
In the prior art, a common display panel includes a first electrode and a second electrode disposed opposite to each other; and a functional layer disposed between the first electrode and the second electrode. The functional layer includes an organic light emitting layer and an organic layer common layer. The light emitting principle of the display panel is that the organic light emitting material forming the organic light emitting layer emits light by injecting and recombining carriers in the organic light emitting layer under the driving of an electric field between two electrodes.
In the display panel, a pixel definition layer is required to be disposed to divide a plurality of pixels, and the pixel definition layer includes a plurality of pixel openings corresponding to the pixels one to one. The organic light emitting layers of different pixels are separated into independent light emitting units, and all the pixels share an organic common layer. In the display panel having the conventional structure, there is a residual image when an image is displayed.
Disclosure of Invention
In view of this, the present invention provides a display panel and a method for manufacturing the same, which can reduce or even avoid the afterimage of the display panel.
In order to achieve the above purpose, the invention provides the following technical scheme:
a display panel, comprising:
a substrate base plate;
the first electrode layer and the pixel definition layer are positioned on the same side of the substrate, the first electrode layer comprises a plurality of first electrodes, the pixel definition layer comprises a pixel defining wall and a plurality of pixel openings, and the first electrodes are positioned at the bottoms of the pixel openings;
the first common organic layer is positioned on one side, away from the substrate, of the pixel defining layer and the first electrode, and covers the pixel defining layer;
and a conductive member located between the pixel defining layer and the first common organic layer, the conductive member being in contact with the pixel defining layer and the first common organic layer, respectively, and overlapping at least the pixel defining wall in a direction perpendicular to a plane of the substrate base plate.
Optionally, in the display panel, the conductive member is electrically connected to a fixed voltage.
Optionally, in the display panel, the fixed voltage is an anode voltage or a cathode voltage of a pixel in the display panel.
Optionally, in the display panel, the conductive component includes an isolation trace located between two adjacent pixel openings.
Optionally, in the display panel, in a direction perpendicular to the plane of the substrate base plate, the isolation trace covers at least a part of the upper surface of the pixel defining wall.
Optionally, in the display panel, the display panel further includes:
the organic light-emitting layer is positioned between the second electrode layer and the first electrode layer;
the second electrode layer comprises a second electrode;
the conductive member is electrically connected to the first electrode or the second electrode.
Optionally, in the display panel, the display panel includes:
a display area and a non-display area surrounding the display area;
in the display area, the conductive piece is electrically connected with the second electrode through the first via hole.
Optionally, in the display panel, the conductive member is an integrated grid structure.
Optionally, in the display panel, the display panel includes:
a display area and a non-display area surrounding the display area;
the non-display area comprises a first voltage signal line, the isolation routing line extends to the non-display area and is electrically connected with the first voltage signal line, and the first voltage signal line is used for providing the fixed voltage.
Optionally, in the display panel, the conductive member includes a plurality of conductive blocks, an insulating gap is formed between adjacent conductive blocks, and the conductive blocks are electrically connected to the first electrode.
Optionally, in the display panel, the conductive block covers the pixel opening, and the insulating gap and the pixel defining wall partially overlap in a direction perpendicular to a plane of the substrate base plate.
Optionally, in the display panel, the conductive blocks correspond to the first electrodes one to one, the conductive blocks are in a closed ring structure, and a central hole of the closed ring structure exposes the corresponding first electrode.
Optionally, in the display panel, the conductive member includes indium tin oxide.
Based on the same inventive concept, the invention further provides a manufacturing method for manufacturing the display panel, which is characterized by comprising the following steps:
providing a substrate base plate;
forming a patterned first electrode layer on one side of the substrate base plate, wherein the first electrode layer comprises a plurality of first electrodes;
forming a patterned pixel defining layer on the same side of the substrate, wherein the pixel defining layer comprises a pixel defining wall and a plurality of pixel openings, and the first electrode is positioned at the bottom of the pixel openings;
forming a patterned conductive member on the surface of the pixel defining layer;
forming a first common organic layer covering the conductive member, the pixel defining layer, and the first electrode;
wherein the conductive member is in contact with the pixel defining layer and the first common organic layer, respectively, and overlaps at least the pixel defining wall in a direction perpendicular to a plane of the substrate base plate.
As can be seen from the above description, in the display panel and the manufacturing method thereof according to the present invention, a conductive member is disposed between a pixel defining layer and a first common organic layer, the pixel defining layer includes a pixel defining wall and a plurality of pixel openings, the conductive member is in contact with the pixel defining layer and the first common organic layer, respectively, and at least overlaps with the pixel defining wall in a direction perpendicular to a plane of the substrate base plate. Therefore, the conductive piece can be used for reducing the pollution of organic molecules in the first public organic layer to the pixel definition layer, when an image is displayed, the phenomenon that the area surface of the pixel definition layer covered by the conductive piece generates carrier accumulation due to the pollution of the organic molecules can be avoided, the occurrence of image sticking is reduced or even avoided, the conductive piece has an equipotential characteristic, the pixel definition layer area covered by the conductive piece can be enabled to be equipotential, the problem of the accumulation of the carriers on the surface of the pixel definition layer of the area is completely avoided, the occurrence of the image sticking in the area is completely avoided, and the image display quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional display panel;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 4 is a top view of a conductive member according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a top view of conductive elements in the display panel shown in FIG. 5;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 8 is a top view of conductive elements in the display panel shown in FIG. 7;
fig. 9 is a schematic view illustrating a disposing manner of a pixel opening according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only one sub-embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional display panel, which includes: the display device comprises a substrate 10, a first electrode layer 11 and a pixel defining layer 12 which are arranged on the same side of the substrate 10, wherein the first electrode layer 11 comprises a plurality of first electrodes 111, the pixel defining layer 12 comprises a pixel defining wall 121 and a plurality of pixel openings K1, and the first electrodes 111 are positioned at the bottom of the pixel openings K1. There is also a first common organic layer 13 on the side of the pixel defining layer 12 and the first electrode 111 facing away from the base substrate 10. The first common organic layer 13 has an organic light emitting layer 14 on the surface thereof, and is divided into a plurality of organic light emitting units 141 corresponding to the first electrodes 111 one to one, and all the organic light emitting units 141 are at least partially located in the corresponding pixel openings K1. A second common organic layer 15 is disposed on the surfaces of the organic light emitting layer 14 and the first common organic layer 13, a second electrode layer 16 is disposed on the surface of the second common organic layer 15, and the second electrode layer 16 includes a second electrode.
The display panel shown in fig. 1 is an OLED (Organic Light-Emitting Diode) display panel, which includes a plurality of OLED pixels, each OLED pixel has a separate first electrode 111 and a separate Organic Light-Emitting unit 141, and the second electrode layer 16 can serve as a common second electrode for all OLED pixels. All OLED pixels share a first common organic layer 13 and a second common organic layer 15. The first common organic layer 13 includes a hole injection layer and/or a hole transport layer, and when the first common organic layer 13 has both the hole injection layer and the hole transport layer, the hole injection layer is located between the hole transport layer and the first electrode layer 11. The second common organic layer 15 comprises an electron transport layer and/or an electron injection layer, which is located between the second electrode layer 16 and the electron transport layer when the second common organic layer 15 has both an electron transport layer and an electron injection layer. Optionally, the first electrode is an anode and the second electrode is a cathode.
In the above display panel, the interface defect 17 is generated at the interface between the pixel defining layer 12 and the first organic common layer 13 due to the diffusion of organic molecules, when the display panel displays, the first electrode 111 and the second electrode 16 apply voltage signals to drive the carriers to emit light compositely in the organic light emitting unit 141, if the two adjacent pixels are in different lighting states, the voltages of the first electrodes 111 are different, and the second electrode layer 16 as the common second electrode has a set voltage, so that the two first electrodes 111 and the second electrode layer 16 of the two pixels can be equivalent to three terminals of a MOS transistor, the second electrode layer 16 is equivalent to a gate, the two first electrodes 111 are equivalent to a source and a drain, respectively, and the equivalent MOS structure can cause the carrier accumulation phenomenon in the interface defect region between the two pixels to generate a voltage drop, thereby causing image sticking.
In order to solve the above problems, an embodiment of the present invention provides a display panel and a manufacturing method thereof, in which a conductive device is disposed between a pixel defining layer and a first common organic layer, so that the conductive device can be used to reduce pollution of organic molecules in the first common organic layer to the pixel defining layer, and when displaying an image, carrier accumulation due to organic molecule pollution on a surface of a region of the pixel defining layer covered by the conductive device can be avoided, thereby reducing or even avoiding occurrence of an afterimage.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where the display panel includes: a base substrate 20; a first electrode layer 21 and a pixel defining layer 22 on the same side of the substrate base plate 20, the first electrode layer 21 including a plurality of first electrodes 211, the pixel defining layer 22 including a pixel defining wall 221 and a plurality of pixel openings K2, the first electrodes 211 being located at the bottom of the pixel openings K2; a first common organic layer 23 located on the pixel defining layer 22 and a side of the first electrode 211 facing away from the substrate 20, the first common organic layer 23 covering the pixel defining layer 22; a conductive member 27 located between the pixel defining layer 22 and the first common organic layer 23, the conductive member 27 being in contact with the pixel defining layer 22 and the first common organic layer 23, respectively, and overlapping at least the pixel defining wall 221 in a direction perpendicular to the plane of the substrate 20. The first common organic layer 23 is implemented in the same manner as shown in fig. 1, and will not be described herein again.
It can be seen that, in the display panel according to the embodiment of the present invention, a conductive device 27 is disposed between the pixel defining layer 22 and the first common organic layer 23, where the conductive device 27 may be used to reduce the pollution of organic molecules in the first common organic layer 23 to the pixel defining layer 22, and when displaying an image, the conductive device 27 may avoid the accumulation of carriers on the surface of the area of the pixel defining layer 22 covered by the conductive device 27 due to the pollution of organic molecules, so as to reduce or even avoid the occurrence of an afterimage, and the conductive device 27 has an equipotential characteristic, so that the area of the pixel defining layer 22 covered by the conductive device 27 is equipotential, thereby completely avoiding the problem of the accumulation of carriers on the surface of the pixel defining layer 22 in the area, completely avoiding the occurrence of an afterimage in the area, and improving the image display quality.
Optionally, in order to avoid the conductive member 27 generating an induced voltage and affecting the image display quality, the conductive member 27 is configured to input a fixed voltage. The display panel provided by the embodiment of the invention is provided with a plurality of pixels, and the pixels can emit light through anode voltage and cathode voltage so as to display images. Therefore, the fixed voltage can be the anode voltage or the cathode voltage of the display panel, so that the existing voltage signals of the display panel are multiplexed, a voltage signal wire does not need to be arranged independently, the panel structure is simplified, and the manufacturing cost is reduced.
Optionally, as shown in fig. 2, the display panel further includes: an organic light emitting layer 24 and a second electrode layer 26, the organic light emitting layer 24 being located between the second electrode layer 26 and the first electrode layer 21; the second electrode layer 26 comprises a second electrode; the conductive member 27 is electrically connected to the first electrode 211 or the second electrode. The implementation of the second electrode layer 26 is the same as that shown in fig. 1, and is not described herein again. If the conductive member 27 is electrically connected to the first electrode 211, the voltage of the first electrode 211 may be multiplexed as the fixed voltage, and if the conductive member 27 is electrically connected to the second electrode, the voltage of the second electrode may be multiplexed as the fixed voltage, so that the existing voltage signals of the display panel may be multiplexed without separately increasing the voltage signals. Optionally, a second common organic layer 25 is further included between the second electrode layer 26 and the organic light emitting layer 24, and the implementation manner of the second common organic layer 25 is the same as that shown in fig. 1, and is not described herein again.
The display panel of the embodiment of the invention is an OLED display panel and is provided with a plurality of OLED pixels, the first electrode 211 is used as an anode of the OLED pixels, and the second electrode is used as a cathode of the OLED pixels. When displaying an image, an anode voltage is input to the anode and a cathode voltage is input to the cathode, so that the OLED pixel has carrier recombination at the position of the organic light emitting layer 24, and then emits light to display an image.
Optionally, referring to fig. 3, fig. 3 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, where the display panel includes: a display area and a non-display area surrounding the display area. In the display region, the conductive member 27 is electrically connected to the second electrode through the first via hole 28 in the manner shown in fig. 3 based on the manner shown in fig. 2. The display area has a plurality of pixels, and the non-display area has a driving circuit for driving the pixels to emit light to realize image display. Fig. 3 shows only the display region and does not show the non-display region and the driving circuit located in the non-display region. The first via hole 28 is located on the upper surface of the pixel defining wall 221, and the first via hole 28 does not overlap with the pixel opening K2 in a direction perpendicular to the plane of the substrate base plate 20, so that the first via hole 28 does not affect the aperture ratio and the light emitting efficiency. In other embodiments, the conductive member 27 may extend to the non-display region, and be connected to the existing voltage signal line in the non-display region to input the fixed voltage, or the fixed voltage may be provided by an additional voltage signal line.
In this embodiment of the present invention, the structure of the conductive component 27 is as shown in fig. 4, and fig. 4 is a top view of the conductive component according to the embodiment of the present invention, and optionally, in this manner, the conductive component 27 includes an isolation trace L located between two adjacent pixel openings K2. The isolation trace L is located outside the pixel opening K2, and the isolation trace L may be made of a transparent conductive material (such as ITO) or a non-transparent conductive material (such as metal like Al, Cu or Ag).
As shown in fig. 2-4, the isolation trace L covers at least a portion of the upper surface of the pixel defining wall 221 in a direction perpendicular to the plane of the substrate base plate 20. As described above, in the conventional display panel, because two adjacent pixels between two pixels have an equivalent MOS, carrier accumulation occurs in the interface defect region of the interface between the first common organic layer 13 and the pixel defining layer 12 between the two pixels, in the present technical solution, the isolation trace L is disposed to cover at least a portion of the upper surface of the pixel defining wall 221, so that diffusion contamination of organic molecules in the first common organic layer 23 to the surface of the pixel defining wall 221 of the pixel defining layer 22 can be reduced or even completely avoided, and carrier accumulation in the interface defect region of the interface between the first common organic layer 23 and the pixel defining layer 22 between the two pixels can be reduced or even avoided, because the isolation trace L is electrically connected to a fixed voltage, its own voltage is constant, and there is no voltage drop, so the upper surface region of the pixel defining wall 221 covered by the isolation trace L is equipotential, the accumulation of the carriers is completely avoided, so that the afterimage generated by the accumulation of the carriers in the interface defect region can be reduced or eliminated. The isolation trace L may also cover a portion of the sidewall of the pixel defining wall 221, and has an insulation gap with the first electrode 211.
Optionally, as shown in fig. 4, the conductive component 27 is an integrated grid structure, and all the isolation traces L are connected into a whole, so that the conductive component 27 is convenient to input a fixed voltage integrally. The layout manner of the isolation traces L is not limited to the manner shown in fig. 4, and in other manners, the isolation traces L may be disposed only on the upper surfaces of the pixel defining walls 221 in the pixel row gaps, or disposed on the upper surfaces of the pixel defining walls 221 in the pixel column gaps.
The isolation trace L may be electrically connected to the second electrode through the first through hole 28 in the display region as described above, and the voltage of the second electrode is used as the fixed voltage, and in other manners, the isolation trace L may also be extended to the non-display region so as to input the fixed voltage, at this time, the non-display region includes a first voltage signal line, the isolation trace L is extended to the non-display region and electrically connected to the first voltage signal line, and the first voltage signal line is used for providing the fixed voltage. The first voltage signal line may be multiplexed with an existing voltage signal line of the display panel, a voltage signal line of the first electrode, or a voltage signal line of the second electrode, or a voltage signal is separately added to a non-display area of the display panel as the first voltage signal.
Referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 6 is a top view of a conductive member in the display panel shown in fig. 5, which is different from the manner shown in fig. 2 in that a conductive member 27 is disposed at a different position and has a different structure, in the display panel shown in fig. 5, optionally, the conductive member 27 includes a plurality of conductive blocks 271, an insulating gap 31 is formed between adjacent conductive blocks 271, the conductive blocks 271 are electrically connected to the first electrode 211, the voltage of the first electrode 211 is directly multiplexed as the fixed voltage, and a fixed voltage can be input to the conductive blocks 271 without providing a through hole or a voltage signal line.
In the manner shown in fig. 5, the conductive block 271 covers the pixel opening K2, and the insulating gap 31 and the pixel defining wall 221 partially overlap in a direction perpendicular to the plane of the substrate base plate 20 to prevent the different first electrodes 211 from being short-circuited. The conductive block 271 at least covers a portion of the pixel defining wall 221 to reduce the mutual contact area separating the first common organic layer 23 and the pixel defining wall 221, reduce the diffusion contamination of the pixel defining wall 221 by organic molecules in the first common organic layer 23, and reduce the unnecessary carrier accumulation, and in order to reduce the carrier accumulation to the maximum extent, the conductive block 271 is disposed to completely cover the sidewall of the pixel defining wall 221 and cover a portion of the upper surface of the pixel defining wall 221.
In the manner shown in fig. 5, the conductive block 271 is a pixel defining wall 221 upper surface area that completely covers the corresponding pixel opening K2 and its periphery. In this case, it is necessary that the conductive member 27 may be a transparent conductive material, such as ITO (indium tin oxide).
Alternatively, the conductive blocks 271 may correspond to the pixel openings K2 one by one, and in other manners, a part of the conductive blocks K2 may be provided with one conductive block 271 corresponding thereto.
In the manner shown in fig. 5 and 6, even if the conductive bumps 271 are made of a transparent material (such as ITO), they will absorb a certain amount of light, and in order to improve the display brightness, the display panel can be further shown in fig. 7 and 8.
Referring to fig. 7 and 8, fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention, fig. 8 is a top view of conductive pieces in the display panel shown in fig. 7, the manner shown in fig. 7 and 8 is different from the manner shown in fig. 5 and 6 in that the conductive pieces 271 have different structures, optionally, in the manner shown in fig. 7 and 8, the conductive pieces 271 correspond to the first electrodes 211 one by one, the conductive pieces 271 have a closed ring structure, a central hole of the closed ring structure exposes the corresponding first electrode 211, optionally, a central hole of the closed ring structure exposes a central region of the corresponding first electrode 211, so that, on one hand, the ring structure of the conductive pieces 271 can be in contact with a peripheral region outside the central region of the corresponding first electrode 211 to achieve electrical connection therebetween, and on the other hand, the closed ring structure can also reduce absorption of light by the conductive pieces 271, the display brightness is improved.
Alternatively, in the display panel, the material of the conductive member 27 may be selected from a transparent material or an opaque material based on the position where the conductive member is disposed. The substrate 20 is a TFT substrate and has a thin film transistor TFT, in the display panel, the first electrode 211 and the second electrode are electrically connected to a pixel driving circuit composed of thin film transistors in the TFT substrate, and the pixel driving circuit drives the connected pixels to perform light emitting display.
The display panel has a plurality of pixels. The pixels may be arranged in an array or non-array. In the above-described embodiment, as in the manner shown in fig. 4, 6, and 8, the pixel openings K2 are arranged in an array as an example, and in this case, the pixels corresponding to the pixel openings K2 one to one are also arranged in an array. In other manners, as shown in fig. 9, fig. 9 is a schematic diagram of a setting manner of pixel openings according to an embodiment of the present invention, and in the manner shown in fig. 9, the pixel openings K2 may be arranged in a non-array manner, where the pixels corresponding to the pixel openings K2 in a one-to-one manner are also arranged in a non-array manner. In the embodiment of the present invention, the layout manner of the pixel opening K2 and the pixels is not specifically limited, the layout manner of the conductive member 27 may be set based on the layout of the pixel opening K2 and the pixels, and the layout manner of the conductive member 27 is not specifically limited.
As can be seen from the above description, in the display panel according to the embodiment of the present invention, the conductive member 27 is disposed between the first common organic layer 23 and the pixel defining layer 22, so that contamination of the pixel defining layer 22 by organic molecules can be reduced, and when an image is displayed, carrier accumulation at an interface between the first common organic layer 23 and the pixel defining layer 22 between pixels can be reduced, thereby reducing or even avoiding image sticking, and improving display quality.
Based on the foregoing display panel embodiment, another embodiment of the present invention further provides a manufacturing method for manufacturing the display panel according to the foregoing embodiment, where the manufacturing method includes:
step S11: a substrate is provided.
Step S12: and forming a patterned first electrode layer on one side of the substrate, wherein the first electrode layer comprises a plurality of first electrodes.
Step S13: and forming a patterned pixel definition layer on the same side of the substrate, wherein the pixel definition layer comprises a pixel defining wall and a plurality of pixel openings, and the first electrode is positioned at the bottom of the pixel openings.
Step S14: and forming a patterned conductive member on the surface of the pixel defining layer.
Step S15: forming a first common organic layer covering the conductive member, the pixel defining layer, and the first electrode.
Wherein the conductive member is in contact with the pixel defining layer and the first common organic layer, respectively, and overlaps at least the pixel defining wall in a direction perpendicular to a plane of the substrate base plate.
The manufacturing method of the embodiment of the invention can manufacture the display panel with the conductive piece, can reduce the pollution of organic molecules to the pixel definition layer through the conductive piece, can reduce the accumulation of current carriers at the interface of the first public organic layer and the pixel definition layer between the pixels when displaying images, reduces or even avoids ghost shadow, and improves the display quality.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar components in the embodiments are referred to each other. The manufacturing method disclosed by the embodiment corresponds to the display panel disclosed by the embodiment, so that the description is relatively simple, and relevant parts can be described by referring to the corresponding parts of the display panel.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A display panel, comprising:
a substrate base plate;
the first electrode layer and the pixel definition layer are positioned on the same side of the substrate, the first electrode layer comprises a plurality of first electrodes, the pixel definition layer comprises a pixel defining wall and a plurality of pixel openings, and the first electrodes are positioned at the bottoms of the pixel openings;
the first common organic layer is positioned on one side, away from the substrate, of the pixel defining layer and the first electrode, and covers the pixel defining layer;
a conductive member located between the pixel defining layer and the first common organic layer, the conductive member being in contact with the pixel defining layer and the first common organic layer, respectively, and overlapping at least the pixel defining wall in a direction perpendicular to a plane of the substrate base plate;
the conductive piece is used for inputting fixed voltage;
the fixed voltage is the anode voltage of a pixel in the display panel;
when the fixed voltage is the anode voltage of a pixel in the display panel, the conductive piece comprises a plurality of conductive blocks, an insulation gap is formed between every two adjacent conductive blocks, and the conductive blocks are electrically connected with the first electrode; the conductive block covers the pixel opening, the insulating gap and the pixel defining wall are partially overlapped in the direction perpendicular to the plane of the substrate base plate, and the conductive block covers the upper surface area of the peripheral pixel defining wall.
2. The display panel according to claim 1, further comprising:
the organic light-emitting layer is positioned between the second electrode layer and the first electrode layer;
the second electrode layer comprises a second electrode;
the conductive member is electrically connected to the first electrode.
3. The display panel according to claim 1, wherein the conductive blocks correspond to the first electrodes one to one, the conductive blocks are in a closed ring structure, and a central hole of the closed ring structure exposes the corresponding first electrode.
4. The display panel of claim 1, wherein the conductive member comprises indium tin oxide.
5. A manufacturing method for manufacturing the display panel according to any one of claims 1 to 4, the manufacturing method comprising:
providing a substrate base plate;
forming a patterned first electrode layer on one side of the substrate base plate, wherein the first electrode layer comprises a plurality of first electrodes;
forming a patterned pixel defining layer on the same side of the substrate, wherein the pixel defining layer comprises a pixel defining wall and a plurality of pixel openings, and the first electrode is positioned at the bottom of the pixel openings;
forming a patterned conductive member on the surface of the pixel defining layer;
forming a first common organic layer covering the conductive member, the pixel defining layer, and the first electrode;
wherein the conductive member is in contact with the pixel defining layer and the first common organic layer, respectively, and overlaps at least the pixel defining wall in a direction perpendicular to a plane of the substrate; the conductive piece comprises a plurality of conductive blocks, an insulation gap is formed between every two adjacent conductive blocks, and the conductive blocks are electrically connected with the first electrode; the conductive block covers the pixel opening, and the insulating gap and the pixel defining wall partially overlap in a direction perpendicular to the plane of the substrate base plate.
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| CN112086487B (en) * | 2020-09-03 | 2022-10-04 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN112736122A (en) * | 2020-12-30 | 2021-04-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113345941A (en) * | 2021-05-21 | 2021-09-03 | 深圳市华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
| US20240276771A1 (en) * | 2022-02-21 | 2024-08-15 | Boe Technology Group Co., Ltd. | Array substrate and display apparatus |
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