WO2021007720A1 - Panneau d'affichage et procédé de fabrication - Google Patents

Panneau d'affichage et procédé de fabrication Download PDF

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Publication number
WO2021007720A1
WO2021007720A1 PCT/CN2019/095853 CN2019095853W WO2021007720A1 WO 2021007720 A1 WO2021007720 A1 WO 2021007720A1 CN 2019095853 W CN2019095853 W CN 2019095853W WO 2021007720 A1 WO2021007720 A1 WO 2021007720A1
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WIPO (PCT)
Prior art keywords
electrode
light
display panel
substrate
auxiliary electrode
Prior art date
Application number
PCT/CN2019/095853
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English (en)
Chinese (zh)
Inventor
张祖强
邱昌明
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201980090119.3A priority Critical patent/CN113366652A/zh
Priority to PCT/CN2019/095853 priority patent/WO2021007720A1/fr
Publication of WO2021007720A1 publication Critical patent/WO2021007720A1/fr

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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
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • H10K59/80—Constructional details
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations

Definitions

  • This application belongs to the technical field of display panels, and specifically relates to display panels and manufacturing methods.
  • OLED Organic Light-Emitting Diode
  • the organic light-emitting diode display panel is driven by current, so a voltage drop (IR Drop) is generated in the organic light-emitting diode display panel, which causes uneven brightness of the organic light-emitting diode display panel, which seriously affects the visual effect of users. .
  • the present application provides a display panel and a manufacturing method, by adding an auxiliary electrode in the display panel, and electrically connecting the auxiliary electrode and the second electrode, and the auxiliary electrode and the second electrode are connected in parallel , Thereby reducing the resistance of the second electrode, thereby alleviating the voltage drop problem, and improving the visual effect of the user's viewing.
  • the first aspect of the present application provides a display panel.
  • the display panel includes a substrate, a light-emitting unit, and an auxiliary electrode.
  • the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode.
  • the light-emitting layer and the second electrode are arranged adjacent to the substrate, the light-emitting layer is arranged on the side of the first electrode away from the substrate, and the second electrode is arranged on the light-emitting layer away from the substrate.
  • the first electrode On one side of the first electrode, the first electrode is loaded with a first voltage signal, the second electrode is loaded with a second voltage signal, and the first voltage signal and the second voltage signal cooperate with each other to make the light-emitting unit To emit light, the auxiliary electrode is electrically connected with the second electrode and the auxiliary electrode is connected in parallel with the second electrode.
  • an auxiliary electrode is added to the display panel, and the auxiliary electrode is electrically connected to the second electrode and the auxiliary electrode is connected in parallel with the second electrode, thereby reducing the The resistance of the two electrodes.
  • the reduction of the resistance of the second electrode can effectively alleviate the problem of voltage drop, so that the brightness of the organic light emitting diode display panel is uniformly distributed, and the user's viewing visual effect is improved.
  • a second aspect of the present application provides a method for manufacturing a display panel, and the manufacturing method includes:
  • An auxiliary electrode is formed on the side of the light-emitting layer away from the first electrode, and the auxiliary electrode is electrically connected with the second electrode and the auxiliary electrode is connected in parallel with the second electrode.
  • the preparation method provided by the second aspect of the application has a simple preparation process and low cost.
  • the auxiliary electrode is formed on the side of the light-emitting layer away from the first electrode, and the auxiliary electrode is electrically connected to the second electrode And the auxiliary electrode is connected in parallel with the second electrode, thereby reducing the resistance of the second electrode.
  • the reduction of the resistance of the second electrode can effectively alleviate the problem of voltage drop, so that the brightness of the display panel is evenly distributed, and the user's viewing visual effect is improved.
  • FIG. 1 is a schematic diagram of the structure of a display panel in an embodiment of the application.
  • FIG. 2 is a schematic diagram of the structure of a display panel in another embodiment of the application.
  • FIG. 3 is a schematic diagram of the structure of the display panel in the first embodiment of the application.
  • FIG. 4 is a schematic diagram of the structure of the display panel in the second embodiment of this application.
  • FIG. 5 is a schematic diagram of the structure of the display panel in the third embodiment of this application.
  • FIG. 6 is a schematic diagram of the structure of the display panel in the fourth embodiment of this application.
  • FIG. 7 is a schematic diagram of the structure of the display panel in the fifth embodiment of this application.
  • FIG. 8 is a schematic diagram of the structure of the display panel in the sixth embodiment of this application.
  • FIG. 9 is a schematic diagram of the structure of the display panel in the seventh embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a display panel in the eighth embodiment of this application.
  • FIG. 11 is a process flow diagram of a manufacturing method of a display panel in an embodiment of the application.
  • FIG. 12 is a process flow diagram included in step S120 in FIG. 11.
  • FIG. 13 is a process flow diagram of a manufacturing method of a display panel in another embodiment of the application.
  • FIG. 14 is a schematic diagram of an electronic device in an embodiment of this application.
  • Display panel-1 substrate-10, light-emitting unit-20, first electrode-21, light-emitting layer-22, second electrode-23, thin film transistor-24, pixel defining layer-25, buffer layer-26, via-hole- 27.
  • FIG. 1 is a schematic structural diagram of a display panel in an embodiment of the application.
  • the embodiment of the present application provides a display panel 1, and the display panel 1 includes a substrate 10, a light-emitting unit 20, and an auxiliary electrode 30.
  • the light-emitting unit 20 includes a first electrode 21, a light-emitting layer 22, and a second electrode 23.
  • the first electrode 21 is disposed adjacent to the substrate 10 compared to the light-emitting layer 22 and the second electrode 23.
  • the light-emitting layer 22 is provided on the side of the first electrode 21 away from the substrate 10, and the second electrode 23 is provided on the side of the light-emitting layer 22 away from the first electrode 21.
  • the first electrode 21 is loaded with a first voltage signal
  • the second electrode 23 is loaded with a second voltage signal.
  • the first voltage signal and the second voltage signal cooperate with each other to make the light-emitting unit 20 emit light.
  • the auxiliary electrode 30 is electrically connected with the second electrode 23 and the auxiliary electrode 30 is connected in parallel with the second electrode 23.
  • the display panel 1 mainly plays a display role in the electronic device 100, and is used to convert electrical signals into optical signals and emit light to form images, or text, or videos, etc., for users to watch.
  • the display panel 1 usually has a display area and a non-display area, and the display area is usually an area for displaying text, pictures, videos, etc.
  • the non-display area is usually arranged at the periphery of the display area, and the non-display area is usually opaque to shield the wiring in the display screen.
  • the display panel 1 may not include a non-display area, so as to be configured as a full-screen structure.
  • the display panel 1 of the present application includes an Organic Light-Emitting Diode (OLED) panel.
  • OLED Organic Light-Emitting Diode
  • the display panel 1 can be a passive matrix OLED display panel (Passive Matrix OLED, PMOLED) or an active matrix OLED display panel (Active Matrix OLED, AMOLED).
  • the display panel 1 of the present application is an active matrix OLED display panel (Active Matrix OLED, AMOLED).
  • the substrate 10 is the foundation of the entire display panel 1.
  • the substrate 10 in the display panel 1 mainly functions to fix and support other components in the display panel 1.
  • the substrate 10 can fix and support the light-emitting unit 20 and the auxiliary electrode 30 of the present application.
  • the light emitting unit 20 mainly plays a role of emitting light in the display panel 1.
  • the light emitting unit 20 may include a first electrode 21, a light emitting layer 22, and a second electrode 23.
  • the first electrode 21 is loaded with a first voltage signal
  • the second electrode 23 is loaded with a second voltage signal.
  • the first electrode 21 and the second electrode 23 may be an anode and a cathode, and the first voltage signal and the second voltage signal may be a positive voltage signal and a negative voltage signal.
  • the first electrode 21 When the first electrode 21 is an anode and the second electrode 23 is a cathode, the first voltage signal is a positive voltage signal, and the second voltage signal is a negative voltage signal.
  • the first electrode 21 When the first electrode 21 is a cathode and the second electrode 23 is an anode, the first voltage signal is a negative voltage signal, and the second voltage signal is a positive voltage signal. Therefore, the first electrode 21 and the second electrode 23 can send electrons and holes to the light-emitting layer 22, and when the electrons and holes are combined in the light-emitting layer 22, they then emit photons, thereby emitting light.
  • FIG. 2 is a schematic structural diagram of a display panel in another embodiment of this application. As shown in FIG.
  • the structure of the display panel 1 provided by another embodiment of the present application is substantially the same as the structure of the display panel 1 provided in FIG. 1, except that the light-emitting unit 20 of the present application may further include a thin film transistor 24 (Thin Film Transistor, TFT), and the thin film transistor 24 is located between the substrate 10 and the first electrode 21. Among them, the thin film transistor 24 functions as a "switch" in the display panel 1, and is used to control whether the light emitting unit 20 emits light.
  • the display panel of the present application further includes a thin film encapsulation 70 (Thin Film Encapsulation, TFE). The thin film encapsulation layer 70 is provided on the auxiliary electrode 30 and the side of the second electrode 23 away from the light emitting layer 22.
  • the thin film encapsulation layer 70 is used to protect the auxiliary electrode 30 and the light-emitting unit 20, prevent other structures in the display panel 1 from affecting the auxiliary electrode 30 and the light-emitting unit 20, and also prevent external water vapor and impurities from entering the auxiliary electrode 30 and the light-emitting unit 20 .
  • the “one side” mentioned in the present application for example, “the light-emitting layer 22 is provided on the side of the first electrode 21 away from the substrate 10”, it can be understood that the light-emitting layer 22 is directly provided on the first electrode 21.
  • the surface facing away from the substrate 10 can also be understood as the light-emitting layer 22 is provided in the direction of the first electrode 21 away from the substrate 10, and the light-emitting layer 22 and the first electrode 21 are spaced apart, that is, the light-emitting layer 22 and the first electrode 21 There are other structures in the room.
  • the first electrode 21 or the second electrode 23 has resistance due to its own resistance. Therefore, when a current flows through the first electrode 21 or the second electrode 23 to generate holes or electrons, the first electrode 21 Or the second electrode 23 will shunt part of the voltage due to the existence of the resistance, that is, the current will shunt, thereby causing the phenomenon of voltage drop.
  • the generation of the voltage drop will cause the current in the display panel 1 to decrease, and the decrease of the current will cause the brightness of the display panel 1 to decrease and uneven brightness. Therefore, the display effect of the display panel 1 is severely affected, and the visual effect viewed by the user is affected.
  • an auxiliary electrode 30 is added to the display panel 1, and the auxiliary electrode 30 is electrically connected to the second electrode 23 and the auxiliary electrode 30 is connected in parallel with the second electrode 23. Furthermore, the resistance of the second electrode 23 connected in parallel with the auxiliary electrode 30 is reduced. The reduction in the resistance of the second electrode 23 can effectively alleviate the voltage drop problem, thereby improving the brightness of the display panel 1 and uniformly distributing the brightness of the display panel 1 to improve the visual effect of the user's viewing. Regarding whether the second electrode 23 is an anode or a cathode, and the specific structure of the auxiliary electrode 30 in the display panel 1, this application will give a detailed introduction later in this application.
  • FIG. 3 is a schematic diagram of the structure of the display panel in the first embodiment of this application.
  • the structure of the display panel 1 provided by the embodiment of the present application is substantially the same as the structure of the display panel 1 provided in FIG. 1, except that the first electrode 21 of the display panel 1 in the first embodiment of the present application is an anode.
  • the second electrode 23 is a cathode.
  • the light-emitting unit 20 further includes a pixel defining layer 25.
  • the pixel defining layer 25 is provided on the side of the first electrode 21 facing away from the substrate 10, and the pixel defining layer 25 is provided with Hole, the light-emitting layer 22 is provided in the through hole and electrically connected to the first electrode 21, and the second electrode 23 is provided on the pixel defining layer 25 and the light-emitting layer 22 is away from the substrate 10 The second electrode 23 is electrically connected to the light-emitting layer 22, and the auxiliary electrode 30 is provided on the side of the pixel defining layer 25 away from the substrate 10.
  • the pixel defining layer 25 divides the display panel 1 into a plurality of sub-pixel regions, and the self-luminous light-emitting layer 22 is disposed in the sub-pixel regions.
  • the second electrode 23 is a cathode, that is, the auxiliary electrode 30 is connected in parallel with the cathode. At this time, the resistance of the cathode is reduced, thereby alleviating the problem of voltage drop due to the cathode, thereby improving the brightness of the display panel 1 and making the display panel 1. The brightness is evenly distributed to enhance the visual effect of users’ viewing.
  • the second electrode 23 and the auxiliary electrode 30 are both provided on the side of the pixel defining layer 25 away from the substrate 10.
  • the first case is that the second electrode 23 is more expensive than the auxiliary electrode 30. Close to the pixel defining layer 25; in the second case, the auxiliary electrode 30 is closer to the pixel defining layer 25 than the second electrode 23. This application will be introduced in detail below.
  • the second electrode 23 is closer to the pixel defining layer 25 than the auxiliary electrode 30, the second electrode 23 is provided on the pixel defining layer 25 and the light-emitting layer 22, and the auxiliary The electrode 30 is arranged on the second electrode 23.
  • the display panel 1 provided in this embodiment has a simple structure, is easier to prepare, and can be used simply and effectively.
  • the resistance of the second electrode 23 is reduced, which alleviates the problem of voltage drop.
  • the orthographic projection of the auxiliary electrode 30 on the substrate 10 and the orthographic projection of the light-emitting layer 22 on the substrate 10 partially overlap.
  • the orthographic projection of the auxiliary electrode 30 on the substrate 10 in the present application overlaps with the orthographic projection of the light-emitting layer 22 on the substrate 10, that is, the orthographic projection of a part of the light-emitting layer 22 on the substrate 10 does not coincide with that of the auxiliary electrode.
  • the orthographic projection of 30 on the substrate 10 coincides.
  • only the second electrode 23 is provided on the part of the light-emitting layer 22, and the auxiliary electrode 30 is not provided. Therefore, the light transmittance in the light-emitting layer 22 can be increased, and the display panel 1 display effect.
  • FIG. 4 is a schematic diagram of the structure of the display panel in the second embodiment of this application.
  • the structure of the display panel 1 provided by the second embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the first embodiment of the present application.
  • the difference is that the auxiliary electrode 30 of the present application is formed on the substrate 10
  • the orthographic projection is located within the orthographic projection range of the pixel defining layer 25 on the substrate 10.
  • the orthographic projection of the auxiliary electrode 30 on the substrate 10 of the present application is within the orthographic projection range of the pixel defining layer 25 on the substrate 10, which means that only the side of the light emitting layer 22 facing away from the substrate 10 is provided.
  • FIG. 5 is a schematic diagram of the structure of the display panel in the third embodiment of this application.
  • the structure of the display panel 1 provided by the third embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the second embodiment of the present application, except that the auxiliary electrode 30 of the present application is provided on the pixel defining layer 25
  • the second electrode 23 is disposed on the auxiliary electrode 30 and the light-emitting layer 22.
  • the auxiliary electrode 30 of the present application is closer to the pixel defining layer 25 than the second electrode 23, so that the second electrode 23 is located at the outermost side of the display panel 1, thereby making the second electrode 23 easier to connect with other circuits.
  • the side of the light-emitting unit 20 away from the substrate 10 is relatively flat, so it is easier to prepare other components on the second electrode 23.
  • the embodiment of the present application illustrates that the orthographic projection of the auxiliary electrode 30 on the substrate 10 is located within the orthographic projection range of the pixel defining layer 25 on the substrate 10.
  • the orthographic projection of the auxiliary electrode 30 on the substrate 10 and the orthographic projection of the light-emitting layer 22 on the substrate 10 partially or completely overlap, which can also solve the technical problem of the present application. It should also belong to the scope of protection of this application.
  • the thickness of the auxiliary electrode 30 is greater than the thickness of the second electrode 23.
  • the thickness mentioned in this application can be understood as the dimension in the direction perpendicular to the surface of the substrate 10 on which the light-emitting unit 20 is provided, that is, the thickness dimension. It can be seen from the above that the introduction of the auxiliary electrode 30 can reduce the resistance of the second electrode 23, thereby alleviating the problem of voltage drop generated by the second electrode 23.
  • the total thickness of the second electrode 23 and the auxiliary electrode 30 is equal, since only the second electrode 23 is provided on the corresponding light-emitting layer 22, the auxiliary electrode 30 is not provided, and the auxiliary electrode 30 will only reduce the thickness of the second electrode 23.
  • the thickness of the second electrode 23 is smaller than the thickness of the auxiliary electrode 30, the thickness of the second electrode 23 that affects the transmittance of the light emitted by the light-emitting layer 22 is reduced, thereby further increasing the transmittance of the light and improving the display panel 1 display effect.
  • FIG. 6 is a schematic diagram of the structure of the display panel in the fourth embodiment of this application.
  • the structure of the display panel 1 provided by the fourth embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the second embodiment of the present application.
  • the difference is that the light-emitting unit 20 of the present application further includes a buffer layer 26.
  • the buffer layer 26 is provided between the second electrode 23 and the auxiliary electrode 30, and the buffer layer 26 is used to prevent impurities from entering the light emitting layer 22.
  • the material of the second electrode 23 of the present application may be the same as the material of the auxiliary electrode 30, or the material of the second electrode 23 may be different from the material of the auxiliary electrode 30.
  • the function of the auxiliary electrode 30 of the present application is mainly to be connected in parallel with and electrically connected to the second electrode 23, thereby reducing the resistance of the second electrode 23.
  • the material of the second electrode 23 generally includes, but is not limited to, magnesium, aluminum, silver and the like. The resistance of magnesium, aluminum, and silver is usually higher. Therefore, the material of the auxiliary electrode 30 can be different from that of the second electrode 23.
  • the auxiliary electrode 30 can be made of a metal or metal oxide with lower resistance, such as magnesium alloy or aluminum. Alloy and so on.
  • a buffer layer 26 is added between the second electrode 23 and the auxiliary electrode 30.
  • the buffer layer 26 can effectively prevent the impurity elements in the auxiliary electrode 30 from diffusing into other structures in the display panel 1, so that the display panel 1 The performance is more stable.
  • the arrangement of the buffer layer 26 can also block water vapor and oxygen in the outside, and prevent water vapor and oxygen from entering other structures in the display panel 1.
  • the buffer layer 26 may include multiple sub-buffer layers, and the material of the buffer layer 26 includes, but is not limited to, one or two of inorganic substances or organic substances.
  • the inorganic substance may be silicon oxide or silicon oxynitride
  • the organic substance may be a polymer material such as polyimide resin, epoxy resin, or acrylic resin.
  • the method for forming the buffer layer 26 may be chemical vapor deposition, spin coating, spraying, or the like.
  • the buffer layer 26 is provided with a via 27, and the second electrode 23 and the auxiliary electrode 30 are electrically connected through the via 27. Since the second electrode 23 and the auxiliary electrode 30 need to be electrically connected, in an embodiment of the present application, a via 27 may be provided on the buffer layer 26 to expose part of the second electrode 23, and then the auxiliary electrode 30 is prepared. Therefore, the auxiliary electrode 30 fills the via hole 27, so that the auxiliary electrode 30 is electrically connected to the second electrode 23 through the via hole 27.
  • the number of via holes 27 may be one or multiple. And when the number of vias 27 is multiple, the electrical connection performance between the second electrode 23 and the auxiliary electrode 30 can be further improved, so that the signal transmission can be faster.
  • FIG. 7 is a schematic diagram of the structure of the display panel in the fifth embodiment of this application.
  • the structure of the display panel 1 provided by the fifth embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the fourth embodiment of the present application.
  • the difference is that the buffer layer 26 of the present application is formed on the substrate 10
  • the orthographic projection is located in the orthographic projection of the second electrode 23 on the substrate 10 and the orthographic projection of the auxiliary electrode 30 on the substrate 10.
  • the auxiliary electrode 30 is electrically connected to the second electrode 23 Part of the buffer layer 26 is covered.
  • the orthographic projection of the buffer layer 26 on the substrate 10 is smaller than the orthographic projection of the second electrode 23 on the substrate 10 and the orthographic projection of the auxiliary electrode 30 on the substrate 10 Therefore, the auxiliary electrode 30 can be electrically connected to the second electrode 23 from the portion of the second electrode 23 that is not covered with the buffer layer 26. It can also be understood that the size of the buffer layer 26 in a direction parallel to the surface of the substrate 10 where the light-emitting unit 20 is provided is smaller than the size of the second electrode 23 and the auxiliary electrode 30 in a direction parallel to the surface of the substrate 10 where the light-emitting unit 20 is provided. . At this time, the auxiliary electrode 30 can be electrically connected to the second electrode 23 from one side or opposite sides of the auxiliary electrode 30.
  • FIG. 8 is a schematic diagram of the structure of the display panel in the sixth embodiment of this application.
  • the structure of the display panel 1 provided by the sixth embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the fourth embodiment of the present application. The difference is that the display panel 1 of the present application further includes a first signal transmission line, And a second signal transmission line 40.
  • the first signal transmission line is electrically connected to a plurality of the light-emitting units 20 and is electrically connected to the first electrode 21 in each of the light-emitting units 20, and the second signal transmission line 40 is electrically connected A plurality of the light-emitting units 20 are electrically connected to the second electrodes 23 in each of the light-emitting units 20, and the resistance values of each part of the second signal transmission line 40 are equal.
  • the first signal transmission line transmits the first voltage signal for the first electrode 21, and the second signal transmission line 40 transmits the second voltage signal for the second electrode 23.
  • the first signal transmission line is a VDD line, and the first voltage signal is a positive voltage signal;
  • the second signal transmission line 40 is a VSS line, and the second voltage signal The signal is a negative voltage signal.
  • the resistance value of each part of the second signal transmission line 40 described in this application is equal, and the voltage drop across the second signal transmission line 40 can be made equal.
  • the resistance value of each part of the second signal transmission line 40 is equal, which makes it easier to control the resistance of the second electrode 23 electrically connected to the second signal transmission line 40.
  • the second signal transmission line 40 includes a second input terminal 41, and the second input terminal 41 is used to load the second voltage signal.
  • the second signal transmission line 40 For transmitting the second voltage signal to the second electrode 23, for the light-emitting unit 20 electrically connected to the second signal transmission line 40, the auxiliary electrode is far away from the second input terminal 41
  • the resistance value of 30 is smaller than the resistance value of the auxiliary electrode 30 close to the second input terminal 41.
  • the second input terminal 41 of the second signal transmission line 40 can be loaded with the second voltage signal, and then the second voltage signal is transmitted to the electrically connected second electrode 23 through the second signal transmission line 40, because the signal is in the second signal transmission line 40 and the second electrode 23.
  • a voltage drop is generated during the transmission of the two electrodes 23. Therefore, in the related art, the second electrode 23 is far away from the second input terminal 41. Since the length of the second signal transmission line 40 passing through is long, the voltage drop is generated The larger is, the brightness far away from the second input terminal 41 in the display panel 1 is smaller than the brightness near the second input terminal 41, and finally the brightness of the display panel 1 is uneven.
  • the present application makes the resistance value of the auxiliary electrode 30 far away from the second input terminal 41 smaller than the resistance value of the auxiliary electrode 30 close to the second input terminal 41, by changing the resistance value of the auxiliary electrode 30 Change the resistance value of the second electrode 23 so that the voltage drop across the display panel 1 is the same, so that the brightness far away from the second input terminal 41 is equal to the brightness close to the second input terminal 41, and finally the brightness of the display panel 1 is uniform , To further improve the display effect of the display panel 1.
  • the resistance of the auxiliary electrode 30 gradually increases from a direction away from the second input terminal 41 to close to the second input terminal 41.
  • the thickness of the auxiliary electrode 30 gradually decreases from a direction away from the second input end 41 to close to the second input end 41.
  • the thickness of the auxiliary electrode 30 of the present application gradually decreases from the direction away from the second input terminal 41 to the direction close to the second input terminal 41, so that the resistance of the auxiliary electrode 30 can change from being far away from the second input terminal 41 to close to the second input terminal 41.
  • the direction of the second input terminal 41 gradually increases.
  • a direction parallel to the surface of the substrate 10 close to the first electrode 21 is defined as a first direction D1, and the size of the auxiliary electrode 30 in the first direction D1 is from far away from the input end
  • the direction towards the input terminal gradually decreases.
  • the arrow direction in FIG. 4 is the first direction D1.
  • the size of the auxiliary electrode 30 in the first direction D1 of the present application gradually decreases from the direction away from the input terminal to the direction close to the input terminal, so that the resistance of the auxiliary electrode 30 is moved away from the second input terminal 41
  • the direction to approach the second input terminal 41 gradually increases.
  • FIG. 9 is a schematic diagram of the structure of the display panel in the seventh embodiment of this application.
  • the structure of the display panel 1 provided by the seventh embodiment of the present application is substantially the same as the structure of the display panel 1 provided by the first embodiment of the present application.
  • the difference is that the first electrode 21 of the present application is a cathode, and the second The second electrode 23 is an anode.
  • the light-emitting unit 20 further includes a pixel defining layer 25.
  • the pixel defining layer 25 is provided on the side of the first electrode 21 away from the substrate 10, and the pixel defining layer 25 is provided with Hole, the light-emitting layer 22 is provided in the through hole and electrically connected to the first electrode 21, and the second electrode 23 is provided on the pixel defining layer 25 and the light-emitting layer 22 is away from the substrate 10 The second electrode 23 is electrically connected to the light-emitting layer 22, and the auxiliary electrode 30 is provided on the side of the pixel defining layer 25 away from the substrate 10.
  • the auxiliary electrode 30 is electrically connected and connected in parallel with the second electrode 23, that is, the cathode, so as to reduce the resistance of the cathode, thereby alleviating the problem of voltage drop caused by the resistance of the cathode.
  • the second electrode 23 is the anode, so the auxiliary electrode 30 can also be electrically connected to the anode and connected in parallel to reduce the resistance of the anode, thereby alleviating the problem of voltage drop due to the resistance of the anode.
  • the display panel 1 includes a substrate 10, a light emitting unit 20, an auxiliary electrode 30, a barrier layer 50, and a signal electrode 60.
  • the light emitting unit 20 includes a first electrode 21, a light emitting layer 22, and a second electrode.
  • the first electrode 21 is provided adjacent to the substrate 10 compared to the light-emitting layer 22 and the second electrode 23, and the light-emitting layer 22 is provided on the first electrode 21 away from the substrate 10
  • the second electrode 23 is provided on the side of the light-emitting layer 22 away from the first electrode 21, the first electrode 21 is loaded with a first voltage signal, and the second electrode 23 is loaded with a second voltage signal ,
  • the first voltage signal and the second voltage signal cooperate with each other to make the light-emitting unit 20 emit light
  • the blocking layer 50 is provided on the side of the second electrode 23 away from the light-emitting layer 22, and
  • the auxiliary electrode 30 is provided on the side of the barrier layer 50 away from the second electrode 23, the signal electrode 60 is provided on the side of the auxiliary electrode 30 away from the barrier layer 50, and the signal electrode 60 is connected to the
  • the first electrode 21 is electrically connected
  • the auxiliary electrode 30 is electrically connected to the signal electrode 60 and the auxiliary electrode 30 is connected in parallel with the signal electrode 60, so that
  • auxiliary electrodes 30 of the present application are all electrically connected to and in parallel with the second electrode 23, thereby reducing the resistance of the second electrode 23.
  • the auxiliary electrode 30 is electrically connected to the first electrode 21 in parallel.
  • the auxiliary electrode 30 is not directly electrically connected to the first electrode 21 and in parallel.
  • the auxiliary electrode 30, the barrier layer 50, and the signal electrode 60 are stacked on the second electrode 23 in order, and the signal electrode 60 is An electrode 21 is electrically connected.
  • the auxiliary electrode 30 is electrically connected to the signal electrode 60, and the signal electrode 60 is electrically connected to the first electrode 21. Therefore, the auxiliary electrode 30 can be electrically connected to the first electrode 21 indirectly and in parallel.
  • the arrangement of the barrier layer 50 can isolate the auxiliary electrode 30 and the signal electrode 60 from each other.
  • a signal electrode 60 is added to the auxiliary electrode 30 so that the signal electrode 60 is in the outermost layer of the display panel 1. Therefore, the signal electrode 60 can be electrically connected to the circuit easily and conveniently, so that the circuit is electrically connected to the first electrode 21 located on the bottom layer, and the circuit connection becomes more concise.
  • the first electrode 21 is an anode
  • the second electrode 23 is a cathode.
  • the auxiliary electrode 30 is electrically connected to and in parallel with the anode, thereby reducing the resistance of the anode.
  • the first electrode 21 is a cathode
  • the second electrode 23 is an anode.
  • the auxiliary electrode 30 is electrically connected to the cathode and in parallel, so as to reduce the resistance of the cathode.
  • a manufacturing method of the display panel 1 is also provided. This method can be used to prepare the display panel 1 of the above scheme.
  • the display panel 1 can also be prepared using other preparation methods, which is not limited in this application.
  • the display panel 1 and the manufacturing method of the display panel 1 provided in the embodiments of the present application can be used in conjunction or independently, which does not affect the essence of the present application.
  • FIG. 11 is a process flow diagram of a method for manufacturing a display panel in an embodiment of this application.
  • An embodiment of the present application provides a manufacturing method of the display panel 1, and the manufacturing method includes S100, S110, S120, S130, and S140. Among them, S100, S110, S120, S130, S140 are described in detail as follows.
  • An auxiliary electrode 30 is formed on the side of the light-emitting layer 22 away from the first electrode 21, and the auxiliary electrode 30 is electrically connected to the second electrode 23, and the auxiliary electrode 30 is electrically connected to the second electrode.
  • the electrodes 23 are connected in parallel.
  • the preparation method provided by the embodiment of the present application has a simple preparation process and low cost.
  • the auxiliary electrode 30 is formed on the side of the light-emitting layer 22 away from the first electrode 21, and the auxiliary electrode 30 is connected to the second electrode 21.
  • the electrode 23 is electrically connected and the auxiliary electrode 30 is connected in parallel with the second electrode 23 so as to reduce the resistance of the second electrode 23.
  • the reduction of the resistance of the second electrode 23 can effectively alleviate the problem of voltage drop, so that the brightness of the organic light emitting diode display panel 1 is uniformly distributed, and the visual effect of the user's viewing is improved.
  • FIG. 12 is a process flow diagram included in step S120 in FIG. 11.
  • S120 "form the light emitting layer 22 on the side of the first electrode 21 away from the substrate 10" includes S121, S122, and S123.
  • S121, S122, and S123 are described in detail as follows.
  • the pixel defining layer 25 is formed on the side of the first electrode 21 away from the substrate 10, and the pixel defining layer 25 is opened to form a sub-pixel area, and then the light emitting layer 22 is formed in the through hole.
  • the preparation method provided in this embodiment has a simple process, and can effectively prepare the light-emitting layer 22 arranged at intervals and insulated.
  • FIG. 13 is a process flow diagram of a manufacturing method of a display panel in another embodiment of this application.
  • a manufacturing method of a display panel 1 characterized in that the manufacturing method includes S200, S210, S220, S230, S240, S250, S260.
  • S200, S210, S220, S230, S240, S250, S260 are described in detail as follows.
  • a signal electrode 60 is formed on the side of the auxiliary electrode 30 away from the barrier layer 50, and the signal electrode 60 is electrically connected to the first electrode 21 and the auxiliary electrode 30, and the auxiliary electrode By electrically connecting the signal electrode 60, the auxiliary electrode 30 is electrically connected to the first electrode 21 and the auxiliary electrode 30 is connected in parallel with the first electrode 21.
  • Another embodiment of the present application provides a preparation method for electrically connecting the auxiliary electrode 30 and the first electrode 21.
  • the preparation method provided by the present application has simple process and low cost, and can not only prepare the auxiliary electrode 30 and the first electrode 21 for electrical connection
  • the display panels 1 are connected in parallel to reduce the resistance of the first electrode 21, thereby alleviating the problem of voltage drop due to the first electrode 21. It is also possible to electrically connect the line to the signal electrode 60, thereby making the wiring simpler.
  • FIG. 14 is a schematic diagram of an electronic device in an embodiment of this application.
  • the embodiment of the present application provides an electronic device 100.
  • the electronic device 100 includes a housing 200, and a motherboard 300 and a display device 400 arranged in the housing 200.
  • the motherboard 300 is electrically connected to the display device 400.
  • the display device 400 includes the display panel 1 provided in the embodiment of the present application.
  • the electronic equipment 100 includes, but is not limited to, mobile phones, tablet computers, notebook computers, handheld computers, personal computers (PCs), personal digital assistants (PDAs), portable media players (Portable Media Players). , PMP), navigation devices, wearable devices, smart bracelets, pedometers and other mobile terminals, and fixed terminals such as digital TVs and desktop computers.
  • the electronic device 100 provided in the embodiment of the present application can effectively improve the display brightness of the electronic device 100 by using the display panel 1 provided in the embodiment of the present application, and make the brightness of all parts equal, greatly improving the display of the electronic device 100 The effect is of great practicality.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un panneau d'affichage (1), comprenant un substrat (10), une unité électroluminescente (20) et une électrode auxiliaire (30). L'unité électroluminescente (20) comprend une première électrode (21), une couche électroluminescente (22), et une seconde électrode (23) ; la première électrode (21) étant disposée de manière adjacente au substrat (10) par rapport à la couche électroluminescente (22) et la seconde électrode (23) ; la couche électroluminescente (22) est disposée sur le côté de la première électrode (21) opposée au substrat (10) ; la seconde électrode (23) est disposée sur le côté de la couche électroluminescente (22) opposée à la première électrode (21) ; l'électrode auxiliaire (30) est électriquement connectée à la deuxième électrode (23), et l'électrode auxiliaire (30) est connectée en parallèle à la deuxième électrode (23). En ajoutant l'électrode auxiliaire (30) dans le panneau d'affichage (1), la résistance de la seconde électrode (23) est réduite, de telle sorte que le problème de chute de tension est atténué et l'effet visuel pendant la visualisation des utilisateurs est amélioré. La présente invention concerne en outre un procédé de fabrication du panneau d'affichage (1).
PCT/CN2019/095853 2019-07-12 2019-07-12 Panneau d'affichage et procédé de fabrication WO2021007720A1 (fr)

Priority Applications (2)

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CN201980090119.3A CN113366652A (zh) 2019-07-12 2019-07-12 显示面板及制备方法
PCT/CN2019/095853 WO2021007720A1 (fr) 2019-07-12 2019-07-12 Panneau d'affichage et procédé de fabrication

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Citations (3)

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CN104091818A (zh) * 2014-06-23 2014-10-08 上海天马有机发光显示技术有限公司 一种有机发光显示面板、装置及其制造方法
CN108666343A (zh) * 2017-03-31 2018-10-16 京东方科技集团股份有限公司 显示基板和显示面板
US20180358573A1 (en) * 2017-06-09 2018-12-13 Joled Inc. Organic el display panel and manufacturing method of organic el display panel

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Publication number Priority date Publication date Assignee Title
CN104157675A (zh) * 2014-08-05 2014-11-19 京东方科技集团股份有限公司 一种oled显示器件及其制作方法、显示装置
CN104752439B (zh) * 2015-01-05 2017-12-26 上海天马有机发光显示技术有限公司 一种阵列基板、显示装置及阵列基板制造方法

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Publication number Priority date Publication date Assignee Title
CN104091818A (zh) * 2014-06-23 2014-10-08 上海天马有机发光显示技术有限公司 一种有机发光显示面板、装置及其制造方法
CN108666343A (zh) * 2017-03-31 2018-10-16 京东方科技集团股份有限公司 显示基板和显示面板
US20180358573A1 (en) * 2017-06-09 2018-12-13 Joled Inc. Organic el display panel and manufacturing method of organic el display panel

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