WO2019000930A1 - 显示面板及其制作方法、维修方法以及显示装置 - Google Patents

显示面板及其制作方法、维修方法以及显示装置 Download PDF

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Publication number
WO2019000930A1
WO2019000930A1 PCT/CN2018/074100 CN2018074100W WO2019000930A1 WO 2019000930 A1 WO2019000930 A1 WO 2019000930A1 CN 2018074100 W CN2018074100 W CN 2018074100W WO 2019000930 A1 WO2019000930 A1 WO 2019000930A1
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Prior art keywords
sub
light
light emitting
display panel
emitting
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PCT/CN2018/074100
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English (en)
French (fr)
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徐攀
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京东方科技集团股份有限公司
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Priority to US16/097,051 priority Critical patent/US11200840B2/en
Publication of WO2019000930A1 publication Critical patent/WO2019000930A1/zh

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    • 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]
    • G09G3/3225—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] using an active matrix
    • G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • 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
    • 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
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • 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
    • H10K59/84—Parallel electrical configurations of multiple OLEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/10—Dealing with defective pixels

Definitions

  • At least one embodiment of the present disclosure is directed to an organic light emitting display panel, a method of fabricating the same, a method of repairing the same, and a display device.
  • OLED Organic Light-Emitting Display
  • flat panel display device which is a kind of self-luminous with all solid-state structure, high brightness, full viewing angle, fast response, flexible display and so on.
  • OLED devices are now the next generation of display technology that is highly competitive and promising.
  • yield is one of the main problems affecting the manufacturing cost, and when some bad points appear, it will directly lead to the failure of the entire display device.
  • the manufacturing process of general OLED devices is carried out in a vacuum environment, and environmental cleanliness is one of the main factors affecting the yield. For example, residual impurities in the preparation process are likely to cause partial short circuit between the anode and the cathode, resulting in dark spots. Defects, resulting in reduced reliability of OLED devices.
  • At least one embodiment of the present disclosure provides an organic light emitting display panel, a method of fabricating the same, a method of repairing the same, and a display device.
  • a dead pixel is generated in any of the sub-pixel units included in the organic light emitting display panel, by disconnecting the sub-output terminal connected to the abnormal light emitting region, the abnormal sub-pixel unit including the abnormal light emitting region can be emitted.
  • the brightness of the image light remains essentially unchanged.
  • At least one embodiment of the present disclosure provides an organic light emitting display panel including a substrate substrate and a plurality of sub-pixel units on the substrate substrate, wherein each of the sub-pixel units includes a driving circuit and at least two light emitting In each sub-pixel unit, at least two sub-outputs are separated from the same output end of the driving circuit, and at least two illuminating regions are respectively connected to different sub-outputs so that different illuminating regions are under the control of the same image display signal Send the same image light.
  • the area of at least two of the light-emitting areas in each sub-pixel unit is equal.
  • At least two of the light emitting regions in each of the sub-pixel units include two light emitting regions.
  • two light-emitting areas in each sub-pixel unit are respectively located on opposite sides of the driving circuit.
  • At least two of the light emitting regions in each of the sub-pixel units include at least three light emitting regions, and at least three light emitting regions are disposed around the driving circuit.
  • each of the light emitting regions includes a first electrode, a light emitting layer, and a second electrode, the first electrodes being coupled to respective sub-outputs.
  • a plurality of sub-pixel units include sub-pixel units of different colors.
  • At least one embodiment of the present disclosure provides a method of fabricating an organic light emitting display panel, the method comprising: providing a substrate; forming a plurality of sub-pixel units on the substrate, forming each of the sub-pixel units including forming a driving circuit and at least two In each sub-pixel unit, at the same output end of the driving circuit, at least two sub-outputs are separated, and at least two illuminating regions are respectively connected with different sub-outputs to enable different illuminating regions to display signals in the same image. The same image light is emitted under control.
  • the area of at least two light-emitting regions formed by each sub-pixel unit is equal.
  • forming the light-emitting region includes forming a first electrode, a light-emitting layer, and a second electrode, the first electrode being coupled to the corresponding sub-output.
  • At least one embodiment of the present disclosure provides a display device including any of the above organic light emitting display panels.
  • At least one embodiment of the present disclosure provides a method of repairing an organic light emitting display panel, comprising disconnecting an abnormal light emitting region and a sub output terminal in an abnormal sub-pixel unit.
  • disconnecting the abnormal light-emitting region from the sub-output terminal in the abnormal sub-pixel unit includes cutting off the connection of the abnormal light-emitting region and the sub-output terminal in the abnormal sub-pixel unit by laser cutting.
  • 1 is a partial schematic view of an organic light emitting display panel
  • 2A is an equivalent circuit diagram of a sub-pixel unit of an organic light emitting display panel according to an example of an embodiment of the present disclosure
  • FIG. 2B is a partial cross-sectional view of the organic light emitting display panel having the equivalent circuit illustrated in FIG. 2A;
  • FIG. 2C is a partial plan schematic view of an organic light emitting display panel having the equivalent circuit illustrated in FIG. 2A;
  • 3A is an equivalent circuit diagram of a sub-pixel unit of an organic light emitting display panel according to another example of an embodiment of the present disclosure
  • 3B is a partial plan schematic view of an organic light emitting display panel having the equivalent circuit illustrated in FIG. 3A;
  • 4A is an equivalent circuit diagram of a sub-pixel unit of an organic light emitting display panel according to another example of an embodiment of the present disclosure
  • FIG. 4B is a partial plan schematic view of an organic light emitting display panel having the equivalent circuit illustrated in FIG. 4A;
  • FIG. 5 is a schematic flowchart of a method for fabricating an organic light emitting display panel according to an embodiment of the present disclosure
  • 6A-6C are schematic diagrams showing a maintenance method of an organic light emitting display panel according to an embodiment of the present disclosure.
  • the organic light emitting display panel includes a substrate substrate 10, a plurality of sub-pixel units 20 on the substrate substrate 10, a plurality of data lines 31, and a plurality of strips. Scan line 32.
  • Each sub-pixel unit 20 includes a driving circuit 22 and a light-emitting area 21, and the data line 31 of the organic light-emitting display panel is connected to the anode of the organic light-emitting unit in the light-emitting area 21 through the driving circuit 22 to transmit the display to the organic light-emitting unit in the light-emitting area 21. signal.
  • the dark spot of the pixel caused by the short circuit of the organic light emitting unit itself is generally repaired by laser cutting off the power line (anode line) of the pixel to ensure that no current flows to the cathode, preventing deterioration of the organic light emitting unit.
  • a short circuit condition 41 (or other dead point condition) occurs in the light-emitting region 21 of the sub-pixel unit 20, and a method of cutting off the connection between the light-emitting region 21 and the driving circuit 22 by using a laser to ensure that no current flows to the cathode, that is,
  • the laser cut position 42 is located between the light emitting region 21 and the drive circuit 22 to ensure that no current flows to the cathode to prevent deterioration.
  • the abnormal sub-pixel unit does not emit light, thereby causing pixel defects.
  • Embodiments of the present disclosure provide an organic light emitting display panel, a manufacturing method thereof, a maintenance method, and a display device.
  • the organic light emitting display panel includes a substrate substrate and a plurality of sub-pixel units on the substrate substrate, wherein each of the sub-pixel units includes a driving circuit and at least two light emitting regions, and in each of the sub pixel units, the same output of the driving circuit At least two sub-outputs are separated, and different illuminating regions are connected to different sub-outputs to cause different illuminating regions to emit the same image light under the control of the same image display signal.
  • the abnormal sub-pixel unit including the abnormal light emitting area may be repaired by disconnecting the abnormal light emitting area from the sub output end. . Since at least two light-emitting areas in the sub-pixel unit are connected in parallel, when an abnormal light-emitting area is disconnected from the driving circuit, a current flowing through the other normal light-emitting areas becomes large, and thus the light-emitting brightness of the other normal light-emitting areas is increased. The increase is such that the brightness of the image light emitted by the abnormal sub-pixel unit including the abnormal light-emitting area can be kept substantially unchanged.
  • the organic light emitting display panel provided by the embodiment of the present disclosure, a manufacturing method thereof, a maintenance method, and a display device will be described below with reference to the accompanying drawings.
  • FIG. 2A is an equivalent circuit diagram of a sub-pixel unit of an organic light emitting display panel according to an example of the present embodiment
  • FIG. 2B is an equivalent diagram of FIG. 2A.
  • FIG. 2C is a partial plan schematic view of the organic light emitting display panel having the equivalent circuit shown in FIG. 2A.
  • the organic light emitting display panel includes a substrate substrate 100, a plurality of sub-pixel units 200 on the substrate substrate 100, a plurality of data lines 310, and a plurality of scan lines 320.
  • Each of the sub-pixel units 200 includes a driving circuit 210 and at least two light emitting regions 220.
  • the same output terminal 2101 of the driving circuit 210 separates at least two sub-output terminals, and different light emitting regions 220 are different from each other.
  • the sub-outputs are connected such that the illumination area 220 emits the same image light under the control of the same image display signal.
  • the circuit structure in the driving circuit 210 in FIG. 2A is only schematic.
  • the driving circuit 210 may be a 2T1C structure, that is, including a first thin film transistor (TFT) and a second thin film transistor.
  • the storage capacitor the embodiment includes but is not limited thereto.
  • the driving circuit 210 may also be a 4T2C or 4T1C structure or the like.
  • the volume of the particles (impurities) which are short-circuited by the organic light-emitting display panel is relatively small. Therefore, when the sub-pixel unit 200 provided in this embodiment includes at least two light-emitting regions 220, when a dead pixel is generated in any of the light-emitting regions 220, the The connection of the abnormal light-emitting region 220 to the corresponding sub-output terminal is broken such that the brightness of the image light emitted by the abnormal sub-pixel unit 200 including the abnormal light-emitting region 220 remains substantially unchanged.
  • the sub-pixel unit 200 in the embodiment includes at least two light-emitting areas 220, since at least two light-emitting areas 220 in the sub-pixel unit 200 are connected in parallel, when When a dead pixel is generated in any of the light-emitting regions 220, after the connection between the abnormal light-emitting region 220 and the sub-output terminal is disconnected, the current density of the other normal light-emitting regions 220 in the abnormal sub-pixel unit 200 where the abnormal light-emitting region 220 is located increases. The increase is such that the luminance density of the entire abnormal sub-pixel unit 200 remains substantially unchanged, and thus the visual brightness of the abnormal sub-pixel unit 200 remains substantially unchanged.
  • “disconnecting the abnormal light-emitting area 220 from the sub-output end” means that there is no electrical connection relationship between the abnormal light-emitting area 220 and the sub-output end, and the connection is not made.
  • the line may be a part of the electrode of the abnormal light-emitting area 220 or a part of the sub-output end, which is not limited in this embodiment.
  • FIGS. 2A-2C schematically illustrate an example in which each sub-pixel unit 200 includes two light emitting regions 220, that is, a first light emitting region 221 and a second light emitting region 222.
  • the organic light emitting display panel provided in this embodiment includes a first light emitting region 221, a second light emitting region 222, and a pixel defining layer 330 between the two light emitting regions.
  • the organic light emitting display panel further includes a driving circuit 210 on the substrate substrate 100 and an insulating layer 400 covering the driving circuit 210.
  • the first light-emitting region 221 includes a first electrode 223, a light-emitting layer 224, and a second electrode 225.
  • the first electrode 223 is connected to the first sub-output 211 of the output terminal 2101 of the driving circuit 210.
  • the second light-emitting region 222 The first electrode 223, the light emitting layer 224 and the second electrode 225 are connected, and the first electrode 223 is connected to the second sub-output 212 of the output terminal 2101 of the driving circuit 210.
  • the black dot between the first sub-output 211 and the second sub-output 212 in FIG. 2C indicates that the first sub-output 211 and the second sub-output 212 are connected to the same output 2101 of the drive circuit 210.
  • the data line (or power line) of the organic light emitting display panel is connected to the first electrode 223 in the light emitting region 220 through the driving circuit 210 to transmit a display signal to the light emitting region 220, the first light emitting region 221 and the second light emitting region 222 are The same image light is emitted under the control of the same image display signal.
  • the first electrode 223 in this embodiment may be an anode, and the anode serves as a connection electrode for the forward voltage of the organic light-emitting display panel, and has good electrical conductivity and a high work function value.
  • This embodiment includes but is not limited thereto. .
  • the second electrode 225 in this embodiment may be a cathode, and the cathode serves as a connection electrode of a negative voltage of the organic light-emitting display panel, and has better conductivity and a lower work function value, and the embodiment includes but is not limited thereto. .
  • the first light-emitting region 221 and the second electrode 225 of the second light-emitting region 222 may be common cathode layers, and the embodiment includes but is not limited thereto.
  • FIG. 2A-2C schematically illustrates that the light-emitting layer 224 is included between the first electrode 223 and the second electrode 225.
  • hole transport is further included between the first electrode 223 and the second electrode 225.
  • first sub-output end 211 and the second sub-output end 212 respectively connected to the first illuminating area 221 and the second illuminating area 222 in this embodiment may be the first electrode 223 outside the illuminating area 220, that is,
  • the portions of the first illuminating region 221 and the second illuminating region 222 that are located outside the illuminating region 220 may be regarded as the first sub-output 211 and the second sub-output 212, respectively, and the embodiment includes but is not limited to this.
  • first sub-output 211 and the second sub-output 212 may also be separately fabricated and used to connect the light-emitting area to the driving circuit.
  • Fig. 2B only schematically shows the connection relationship between the light-emitting area and the driving circuit.
  • the driving circuit 210 in each sub-pixel unit 200 includes a thin film transistor (not shown) connected to the first sub-output terminal 211 and the second sub-output terminal 212, and the first sub-output terminal shown in FIG. 2B Both the 211 and the second sub-output 212 are connected to the drain of the thin film transistor. Therefore, the drain of the thin film transistor can be regarded as the output end of the driving circuit, and the embodiment includes but is not limited thereto.
  • the area of the light-emitting area 220 in each sub-pixel unit 200 is equal, for example, the area of the first light-emitting area 221 and the second light-emitting area 222 are equal as shown, and thus, in the sub-pixel unit.
  • the equivalent impedance and current density of each of the light-emitting regions 220 are the same, and the aging is synchronized.
  • each sub-pixel unit 200 includes two light emitting regions 220, that is, each of the sub-pixel units 200 includes a first light emitting region 221 and a second light emitting region 222.
  • the two light-emitting regions 220 in each sub-pixel unit 200 are respectively located on opposite sides of the driving circuit 210, that is, the first light-emitting region 221 and the second light-emitting region 222 are respectively located in the Y direction of the driving circuit 210.
  • the embodiment includes but is not limited thereto.
  • a plurality of sub-pixel units include sub-pixel units 200 of different colors.
  • the sub-pixel units 200 of different colors may include a red sub-pixel unit, a green sub-pixel unit, a blue sub-pixel unit, and a white sub-pixel unit, etc., and the embodiment includes but is not limited thereto.
  • FIG. 3A is an equivalent circuit diagram of one sub-pixel unit of the organic light-emitting display panel provided by another example of the embodiment
  • FIG. 3B is a partial plan view of the organic light-emitting display panel having the equivalent circuit illustrated in FIG. 3A.
  • sexual diagram As shown in FIGS. 3A-3B, each sub-pixel unit 200 includes three light emitting regions 220, that is, a first light emitting region 221, a second light emitting region 222, and a third light emitting region 226.
  • the first light-emitting area 221 is connected to the first sub-output 211 of the driving circuit 210
  • the second light-emitting area 222 is connected to the second sub-output 212 of the driving circuit 210
  • the third light-emitting area 226 and the driving circuit are connected.
  • the third sub-output 213 of 210 is connected. Since the data line (or power line) of the organic light emitting display panel is connected to the light emitting area 220 through the driving circuit 210 to transmit a display signal to the light emitting area 220, the first light emitting area 221, the second light emitting area 222, and the third light emitting area 226 The same image light is emitted under the control of the same image display signal.
  • the driving circuit 210 in each sub-pixel unit 200 includes a thin film transistor (not shown) connected to the first sub-output terminal 211, the second sub-output terminal 212, and the third sub-output terminal 213, the first sub- The output terminal 211, the second sub-output terminal 212, and the third sub-output terminal 213 are both connected to the drain of the thin film transistor. Therefore, the drain of the thin film transistor can be regarded as the output end of the driving circuit, and the embodiment includes but is not limited to this.
  • the areas of the three light-emitting regions 220 in each sub-pixel unit 200 are equal, that is, the areas of the first light-emitting region 221, the second light-emitting region 222, and the third light-emitting region 226 are equal.
  • the light-emitting area 220 in each sub-pixel unit 200 is disposed around the driving circuit 210, and the embodiment includes but is not limited thereto.
  • the light emitting regions 220 are disposed around the driving circuit 210 to make the area of each of the light emitting regions 220 equal, and the embodiment includes but is not limited thereto.
  • FIG. 4A is an equivalent circuit diagram of one sub-pixel unit of the organic light-emitting display panel provided by another example of the embodiment
  • FIG. 4B is a partial plan view of the organic light-emitting display panel having the equivalent circuit illustrated in FIG. 4A.
  • sexual diagram As shown in FIGS. 4A-4B, each sub-pixel unit 200 includes four light emitting regions 220, that is, a first light emitting region 221, a second light emitting region 222, a third light emitting region 226, and a fourth light emitting region 227.
  • the first light-emitting area 221 is connected to the first sub-output 211 of the driving circuit 210
  • the second light-emitting area 222 is connected to the second sub-output 212 of the driving circuit 210
  • the third light-emitting area 226 and the driving circuit are connected.
  • the third sub-output 213 of the branch 210 is connected
  • the fourth sub-region 227 is connected to the fourth sub-output 214 of the drive circuit 210.
  • the data line (or power line) of the organic light emitting display panel is connected to the first electrode 223 in the light emitting area 220 through the driving circuit 210 to transmit a display signal to the light emitting area 220, the first light emitting area 221 and the second light emitting area 222 are The third light-emitting area 226 and the fourth light-emitting area 227 emit the same image light under the control of the same image display signal.
  • the areas of the four light-emitting regions 220 in each sub-pixel unit 200 are equal, that is, the areas of the first light-emitting region 221, the second light-emitting region 222, the third light-emitting region 226, and the fourth light-emitting region 227. equal.
  • the light-emitting regions 220 in each of the sub-pixel units 200 are disposed around the driving circuit 210 to make the area of each of the light-emitting regions 220 equal, and the embodiment includes but is not limited thereto.
  • the number of the light-emitting areas included in each sub-pixel unit in the organic light-emitting display panel provided in this embodiment may also be different, and the embodiment includes but is not limited thereto.
  • Each sub-pixel unit of the organic light emitting diode provided in this embodiment includes at least two light emitting regions.
  • the abnormality is included.
  • the brightness density of the sub-pixel unit of the light-emitting area remains substantially unchanged, but the abnormal sub-pixel unit is aging faster than the normal sub-pixel unit. Therefore, the more the light-emitting area included in one sub-pixel unit, the repaired The aging difference of the sub-pixel unit compared to the normal sub-pixel unit is smaller.
  • the more the light-emitting area included in one sub-pixel unit the smaller the aperture ratio of the sub-pixel unit, and therefore the number of light-emitting areas included in each sub-pixel unit needs to be determined according to the process capability and the capability of the organic light-emitting display panel.
  • each sub-pixel unit including two illuminating regions is a relatively optimized scheme.
  • FIG. 5 is a schematic flowchart of a manufacturing method provided by the embodiment. As shown in FIG. 5, the manufacturing method includes:
  • the material of the base substrate may be made of one or more materials of glass, polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, and the embodiment includes but not Limited to this.
  • each of the sub-pixel units includes forming a driving circuit and at least two light emitting regions, wherein each sub-pixel unit has at least two sub-outputs of the same output end of the driving circuit At the output end, at least two illuminating regions are respectively connected to different sub-outputs.
  • thin film transistors and data lines and scan lines for respectively transmitting data signals and scan signals to the drive circuits are formed on the base substrate.
  • forming the light-emitting region includes forming a first electrode, a light-emitting layer, and a second electrode, the first electrode being coupled to the corresponding sub-output.
  • the sub-output end connected to the light-emitting area in this embodiment may be a first electrode other than the light-emitting area, that is, a portion of the light-emitting area in which the first electrode is located outside the light-emitting area may be regarded as the light-emitting area.
  • the sub-output of the first electrode connection, the embodiment includes but is not limited thereto.
  • the sub-outputs can also be fabricated separately and used to connect the illumination area to the driver circuit.
  • the driving circuit in each sub-pixel unit includes a thin film transistor connected to the sub-output terminal, and at least two sub-outputs are connected to the drain of the thin film transistor. Therefore, the drain of the thin film transistor can be regarded as the output end of the driving circuit.
  • This embodiment includes but is not limited to.
  • a portion of the light-emitting region of each of the sub-pixel units that is outside the light-emitting region may be respectively connected to a drain of the thin film transistor, and the embodiment includes but is not limited thereto.
  • a portion of the light-emitting region of each sub-pixel unit that is outside the light-emitting region may be electrically connected first and then connected to the drain of the thin film transistor.
  • an illuminating layer can be formed by using an Open Mask, which is located on the entire OLED display panel (as shown in FIG. 2B), but only the luminescent layer in the illuminating region is simultaneously connected to the first electrode and The two electrodes, therefore, only the luminescent layer located in the illuminating region can emit light, and the embodiment includes but is not limited thereto.
  • an Open Mask which is located on the entire OLED display panel (as shown in FIG. 2B)
  • IJP Ink-Jet Printing
  • the second electrode of the light emitting region of each sub-pixel unit may be a common electrode layer, and the embodiment includes but is not limited thereto.
  • the first electrode may be an anode, and the anode serves as a connection electrode for the forward voltage of the organic light-emitting display panel, and has better conductivity and a higher work function value, and the embodiment includes but is not limited thereto.
  • the second electrode may be a cathode, and the cathode serves as a connection electrode of a negative voltage of the organic light-emitting display panel, and has better conductivity and a lower work function value, and the embodiment includes but is not limited thereto.
  • forming the light-emitting region further includes forming a functional layer such as at least one of a hole transport layer, an electron transport layer, a hole injection layer, an electron injection layer, a hole blocking layer, and an electron blocking layer, and the embodiment includes but is not limited thereto. .
  • the organic light-emitting display panel produced by the manufacturing method provided by the embodiment has a data line (or a power supply line) connected to the first electrode in the light-emitting area through the driving circuit to transmit a display signal to the light-emitting area, and therefore, each sub-pixel unit All of the illuminating areas emit the same image light under the control of the same image display signal.
  • the abnormal sub-pixel unit in which the abnormal illuminating region is located is The current density of the other normal light-emitting regions increases, and the brightness increases, so that the luminance density of the entire abnormal sub-pixel unit remains substantially unchanged, and therefore, the visual brightness of the abnormal sub-pixel unit remains substantially unchanged.
  • the area of at least two of the light-emitting areas in each sub-pixel unit is equal, and therefore, in the case where the sub-pixel unit is normally illuminated, the equivalent impedance and current density of each of the light-emitting areas are the same, and the aging is synchronized.
  • the light-emitting regions are located on opposite sides of the driving circuit so that the areas of the two light-emitting regions in each sub-pixel unit are equal, and the embodiment includes but is not limited thereto.
  • the embodiment includes but is not limited thereto.
  • a plurality of sub-pixel units include sub-pixel units of different colors.
  • the sub-pixel units of different colors may include a red sub-pixel unit, a green sub-pixel unit, a blue sub-pixel unit, and a white sub-pixel unit, etc., and the embodiment includes but is not limited thereto.
  • the driving circuit may be a 2T1C structure, that is, including a first thin film transistor, a second thin film transistor, and a storage capacitor, and the embodiment includes but is not limited thereto.
  • the driving circuit may also be a 4T2C or 4T1C structure or the like.
  • the number of the light-emitting areas included in each sub-pixel unit in the organic light-emitting display panel provided in this embodiment may also be different, and the embodiment includes but is not limited thereto.
  • Each of the sub-pixel units of the organic light emitting diode provided in this embodiment includes at least two light emitting regions. Since at least two light emitting regions in the sub pixel unit are connected in parallel, when a dead pixel is generated in any of the light emitting regions, the current is turned off. After the connection between the abnormal light-emitting area and the sub-output end, although the brightness density of the sub-pixel unit including the abnormal light-emitting area remains substantially unchanged, the sub-pixel unit is aged faster than the normal sub-pixel unit, and therefore, one sub-pixel The more light-emitting areas a unit includes, the smaller the difference in aging of the repaired sub-pixel unit compared to the normal sub-pixel unit.
  • the more the light-emitting area included in one sub-pixel unit the smaller the aperture ratio of the sub-pixel unit. Therefore, it is necessary to determine the number of light-emitting areas in each sub-pixel unit according to the process capability and the capability of the organic light-emitting display panel.
  • Another embodiment of the present disclosure provides a display device, which includes any of the organic light-emitting display panels provided in the above embodiments, and the display device includes a sub-pixel unit that generates a dead pixel in any of the light-emitting regions. Disconnecting the abnormal light-emitting area from the sub-output terminal can substantially maintain the brightness of the image light emitted by the abnormal sub-pixel unit including the abnormal light-emitting area.
  • the display device may be a display device such as an organic light emitting diode, and any display product or component such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, and the like including the display device. Limited to this.
  • FIGS. 6A-6C are schematic diagrams showing a maintenance method of the organic light emitting display panel according to the embodiment, as shown in FIGS. 6A-6C.
  • a short circuit condition 410 or other dead point condition
  • the abnormal light-emitting area 220 in the abnormal sub-pixel unit 200 is disconnected from the sub-output end, that is, the light is cut off.
  • the connection between the region 220 and the drive circuit 210 ensures that no current flows to the cathode to prevent deterioration.
  • the connection line may be part of the electrode of the abnormal light-emitting area 220, or may be a sub-output.
  • a part of the end is not limited in this embodiment. Since at least two illuminating regions in the sub-pixel unit 200 are connected in parallel, when a dead pixel is generated in any of the illuminating regions 220, after the connection between the abnormal illuminating region 220 and the sub-output terminal is disconnected, the abnormal illuminating region 220 is abnormal.
  • the current density of the other normal light-emitting regions 220 in the sub-pixel unit 200 increases, and the brightness increases, so that the luminance density of the entire abnormal sub-pixel unit 200 remains substantially unchanged, and thus the visual brightness of the abnormal sub-pixel unit 200 remains substantially unchanged. change.
  • each of the light-emitting regions 220 includes a first electrode, a light-emitting layer, and a second electrode, the first electrodes being coupled to respective sub-outputs.
  • the sub-output end connected to the light-emitting area in this embodiment may be a first electrode other than the light-emitting area, that is, a portion of the light-emitting area in which the first electrode is located outside the light-emitting area may be regarded as a sub-output end, respectively.
  • This embodiment includes but is not limited thereto.
  • the connection of the abnormal light-emitting region 220 and the sub-output terminal in the abnormally-off sub-pixel unit 200 includes: disconnecting the sub-output terminal connected to the first electrode of the abnormal light-emitting region 220, for example, The portion of the light-emitting region 220 that is outside the light-emitting region 220 may be disconnected to disconnect the light-emitting region 220 from the driving circuit 210.
  • This embodiment includes but is not limited thereto, as long as the abnormal light-emitting region 220 and the sub-output terminal There is no electrical connection between them.
  • the connection of the abnormal light-emitting region 220 and the sub-output terminal in the abnormal sub-pixel unit 200 includes: cutting off the abnormal light-emitting region 220 and the sub-output terminal in the abnormal sub-pixel unit 200 by using a laser.
  • the connection, ie, the laser cutting position 420, is located between the light emitting region 220 and the drive circuit 210.
  • a portion of the abnormal light-emitting region 220 outside the light-emitting region 220 may be cut off by laser cutting 420 to disconnect the light-emitting region 220 from the driving circuit 210.

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Abstract

一种有机发光显示面板及其制作方法、维修方法以及显示装置。该有机发光显示面板包括衬底基板(100)以及位于衬底基板(100)上的多个子像素单元(200)，其中，每个子像素单元(200)包括驱动电路(210)以及至少两个发光区(220)，在每个子像素单元(200)中，驱动电路(210)的同一个输出端(2101)分出至少两个子输出端(211，212，213，214)，至少两个发光区(220)分别与不同的子输出端(211，212，213，214)连接以使不同发光区(220)在同一图像显示信号的控制下发出相同的图像光。该有机发光显示面板包括的子像素单元中的任一发光区中产生坏点时，通过断开该异常发光区与子输出端的连接，可以使包括该异常发光区的异常子像素单元发出的图像光的亮度基本保持不变。

Description

显示面板及其制作方法、维修方法以及显示装置
相关申请的交叉引用
本申请要求于2017年6月27日递交的中国专利申请第201710501707.4号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开至少一个实施例涉及一种有机发光显示面板及其制作方法、维修方法以及显示装置。
背景技术
有机发光显示(Organic Light-Emitting Display，OLED)器件是一种新型的平板显示器件，是一种具有全固态结构、高亮度、全视角、响应速度快、可柔性显示等一系列优点的自发光器件，因此有机发光二极管器件目前已成为极具竞争力和发展前景的下一代显示技术。
目前，在OLED器件的制备过程中，良率是影响制造成本的主要问题之一，当一些坏点出现时会直接导致整个显示装置的不良。而一般OLED器件的制造过程是在真空环境中进行，环境的洁净度是影响良率的主要原因之一，例如，制备过程中残留的杂质容易造成阳极和阴极之间局部短路而导致出现暗点缺陷，从而造成OLED器件的可靠性下降。
发明内容
本公开的至少一实施例提供一种有机发光显示面板及其制作方法、维修方法以及显示装置。该有机发光显示面板包括的子像素单元中的任一发光区中产生坏点时，通过断开与该异常发光区连接的子输出端，可以使包括该异常发光区的异常子像素单元发出的图像光的亮度基本保持不变。
本公开的至少一实施例提供一种有机发光显示面板，该有机发光显示面板包括衬底基板以及位于衬底基板上的多个子像素单元，其中，每个子像素单元包括驱动电路以及至少两个发光区，在每个子像素单元中，驱动电路的同一个输出端分出至少两个子输出端，至少两个发光区分别与不同的子输出端连接以 使不同发光区在同一图像显示信号的控制下发出相同的图像光。
例如，每个子像素单元中的至少两个发光区的面积相等。
例如，每个子像素单元中的至少两个发光区包括两个发光区。
例如，每个子像素单元中的两个发光区分别位于驱动电路相对的两侧。
例如，每个子像素单元中的至少两个发光区包括至少三个发光区，至少三个发光区围绕驱动电路设置。
例如，每个发光区包括第一电极、发光层和第二电极，第一电极与相应的子输出端连接。
例如，多个子像素单元包括不同颜色的子像素单元。
本公开的至少一实施例提供一种有机发光显示面板的制作方法，该制作方法包括提供衬底基板；在衬底基板上形成多个子像素单元，形成每个子像素单元包括形成驱动电路以及至少两个发光区，在每个子像素单元中，驱动电路的同一个输出端分出至少两个子输出端，至少两个发光区分别与不同的子输出端连接以使不同发光区在同一图像显示信号的控制下发出相同的图像光。
例如，每个子像素单元形成的至少两个发光区的面积相等。
例如，形成发光区包括形成第一电极、发光层和第二电极，第一电极与相应的子输出端连接。
本公开的至少一实施例提供一种显示装置，该显示装置包括上述任一有机发光显示面板。
本公开的至少一实施例提供一种有机发光显示面板的维修方法，包括断开异常的子像素单元中的异常的发光区与子输出端的连接。
例如，断开异常的子像素单元中的异常的发光区与子输出端的连接包括：采用激光切割的方式切断异常的子像素单元中的异常的发光区与子输出端的连接。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为一种有机发光显示面板的局部示意图；
图2A为本公开一实施例的一示例提供的有机发光显示面板的一个子像素 单元的等效电路示意图；
图2B为具有图2A示出的等效电路的有机发光显示面板的局部剖视图；
图2C为具有图2A示出的等效电路的有机发光显示面板的局部平面示意性示图；
图3A为本公开一实施例的另一示例提供的有机发光显示面板的一个子像素单元的等效电路示意图；
图3B为具有图3A示出的等效电路的有机发光显示面板的局部平面示意性示图；
图4A为本公开一实施例的另一示例提供的有机发光显示面板的一个子像素单元的等效电路示意图；
图4B为具有图4A示出的等效电路的有机发光显示面板的局部平面示意性示图；
图5为本公开一实施例提供的有机发光显示面板的制作方法的示意性流程图；
图6A-6C为本公开一实施例提供的有机发光显示面板的维修方法示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“上”、“下”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
图1为一种有机发光显示面板的局部示意图，如图1所示，有机发光显示面板包括衬底基板10，位于衬底基板10上的多个子像素单元20、多条数据线 31以及多条扫描线32。每个子像素单元20包括驱动电路22以及一个发光区21，有机发光显示面板的数据线31通过驱动电路22与发光区21中有机发光单元的阳极相连以向发光区21中的有机发光单元传输显示信号。
在研究中，本申请的发明人发现：在有机发光显示(Organic Light-Emitting Display，OLED)面板的制造过程中，颗粒(杂质)会导致有机发光单元的阳极与阴极发生短路，或者某些其他因素导致有机发光单元的击穿，会导致坏点的产生。坏点数量增加至超过规定数量时，整个屏发生不良，从而造成有机发光单元的可靠性下降。而对于大尺寸有机发光显示装置而言，坏点对良率的影响尤其明显。
有机发光单元本身短路导致的像素暗点一般通过激光切断该像素的电源线(阳极线)来进行维修，以确保没有电流流向阴极，防止有机发光单元出现恶化。如图1所示，子像素单元20的发光区21中出现了短路情况41(或其他坏点情况)，采用激光切断发光区21与驱动电路22的连接的方法以确保没有电流流向阴极，即，激光切割的位置42位于发光区21与驱动电路22之间以确保没有电流流向阴极，防止恶化。当有机发光单元的子像素单元中产生坏点，并切断产生坏点的发光区与驱动电路的连接关系后，该异常的子像素单元不会发光，从而造成像素不良。
本公开的实施例提供一种有机发光显示面板及其制作方法、维修方法以及显示装置。该有机发光显示面板包括衬底基板以及位于衬底基板上的多个子像素单元，其中，每个子像素单元包括驱动电路以及至少两个发光区，在每个子像素单元中，驱动电路的同一个输出端分出至少两个子输出端，不同的发光区与不同的子输出端连接以使不同发光区在同一图像显示信号的控制下发出相同的图像光。该有机发光显示面板包括的子像素单元中的任一发光区中产生坏点时，可以采用断开该异常发光区与子输出端的连接的方式对包括该异常发光区的异常子像素单元进行维修。由于子像素单元中的至少两个发光区是并联的，当发生异常的发光区与驱动电路断开连接时，流经其他正常的发光区的电流变大，因此其他正常的发光区的发光亮度增加，因而可以使包括该异常发光区的异常子像素单元发出的图像光的亮度基本保持不变。
下面结合附图对本公开实施例提供的有机发光显示面板及其制作方法、维修方法以及显示装置进行描述。
本公开一实施例提供一种有机发光显示面板，图2A为本实施例的一示例 提供的有机发光显示面板的一个子像素单元的等效电路示意图，图2B为具有图2A示出的等效电路的有机发光显示面板的局部剖视图，图2C为具有图2A示出的等效电路的有机发光显示面板的局部平面示意性示图。如图2A-2C所示，该有机发光显示面板包括衬底基板100、位于衬底基板100上的多个子像素单元200、多条数据线310以及多条扫描线320。每个子像素单元200包括驱动电路210以及至少两个发光区220，在每个子像素单元200中，驱动电路210的同一个输出端2101分出至少两个子输出端，不同的发光区220与不同的子输出端连接以使发光区220在同一图像显示信号的控制下发出相同的图像光。
需要说明的是，图2A中的驱动电路210内的电路结构仅是示意性的，例如，驱动电路210可以为2T1C结构，即包括第一薄膜晶体管(Thin Film Translator，TFT)、第二薄膜晶体管以及存储电容，本实施例包括但不限于此。例如，驱动电路210还可以为4T2C或4T1C结构等。
一般造成有机发光显示面板短路的颗粒(杂质)的体积比较小，因此，本实施例提供的子像素单元200包括至少两个发光区220时，任一发光区220中产生坏点时，可以通过断开该异常发光区220与相应的子输出端的连接，以使包括该异常发光区220的异常子像素单元200发出的图像光的亮度基本保持不变。相比于子像素单元仅包括一个发光区的情况，本实施例中的子像素单元200包括至少两个发光区220时，由于子像素单元200中的至少两个发光区220是并联的，当任一发光区220中产生坏点时，断开该异常发光区220与子输出端的连接后，该异常发光区220所在的异常子像素单元200中其他正常的发光区220的电流密度增加，亮度增加，因此整个异常的子像素单元200的亮度密度基本保持不变，因而，该异常的子像素单元200的视觉亮度基本保持不变。需要说明的是，“断开该异常发光区220与子输出端的连接”指通过断开异常发光区220与子输出端之间的连接线等方式使两者之间没有电连接关系，其连接线可以是异常发光区220的电极的一部分，也可以是子输出端的一部分，本实施例对此不作限制。
需要说明的是，图2A-2C示意性的示出了每个子像素单元200包括两个发光区220，即第一发光区221和第二发光区222的示例。
例如，如图2A-2C所示，本实施例提供的有机发光显示面板包括第一发光区221、第二发光区222以及位于两个发光区之间的像素限定层330。
例如，该有机发光显示面板还包括位于衬底基板100上的驱动电路210以及覆盖驱动电路210的绝缘层400。
例如，第一发光区221包括第一电极223、发光层224和第二电极225，第一电极223与驱动电路210的输出端2101分出的第一子输出端211连接；第二发光区222包括第一电极223、发光层224和第二电极225，第一电极223与驱动电路210的输出端2101分出的第二子输出端212连接。图2C中第一子输出端211与第二子输出端212之间的黑色圆点表示第一子输出端211与第二子输出端212连接到驱动电路210的同一个输出端2101。由于有机发光显示面板的数据线(或者电源线)通过驱动电路210与发光区220中的第一电极223相连以向发光区220传输显示信号，因此，第一发光区221和第二发光区222在同一图像显示信号的控制下发出相同的图像光。
例如，本实施例中的第一电极223可以为阳极，阳极作为有机发光显示面板正向电压的连接电极，具有较好的导电性能以及较高的功函数值，本实施例包括但不限于此。
例如，本实施例中的第二电极225可以为阴极，阴极作为有机发光显示面板负向电压的连接电极，具有较好的导电性能和较低的功函数值，本实施例包括但不限于此。
例如，如图2A-2C所示，第一发光区221与第二发光区222的第二电极225可以为公用的阴极层，本实施例包括但不限于此。
需要说明的是，图2A-2C示意性的示出了第一电极223与第二电极225之间包括发光层224，实际上第一电极223与第二电极225之间还包括例如空穴传输层、电子传输层、空穴注入层、电子注入层、空穴阻挡层、电子阻挡层至少之一的功能层。
需要说明的是，本实施例中与第一发光区221和第二发光区222分别连接的第一子输出端211和第二子输出端212可以是发光区220以外的第一电极223，即，第一发光区221与第二发光区222中的第一电极223位于发光区220以外的部分可以分别看作第一子输出端211和第二子输出端212，本实施例包括但不限于此。
例如，第一子输出端211和第二子输出端212也可以是单独制作并用于连接发光区与驱动电路。图2B仅示意性的示出了发光区与驱动电路的连接关系。
例如，每个子像素单元200中的驱动电路210中包括与第一子输出端211 和第二子输出端212连接的薄膜晶体管(图中未示出)，图2B示出的第一子输出端211和第二子输出端212均连接到薄膜晶体管的漏极，因此，该薄膜晶体管的漏极可以看作驱动电路的输出端，本实施例包括但不限于此。
例如，如图2C所示，每个子像素单元200中的发光区220的面积相等，例如，如图所示的第一发光区221与第二发光区222的面积相等，因此，在子像素单元200正常发光的情况下，每个发光区220的等效阻抗以及电流密度相同，并且老化同步。
例如，如图2C所示，每个子像素单元200均包括两个发光区220，即每个子像素单元200均包括第一发光区221和第二发光区222。
例如，如图2C所示，每个子像素单元200中的两个发光区220分别位于驱动电路210相对的两侧，即第一发光区221与第二发光区222分别位于驱动电路210沿Y方向的两侧，本实施例包括但不限于此。
例如，多个子像素单元包括不同颜色的子像素单元200。
例如，不同颜色的子像素单元200可以包括红色子像素单元、绿色子像素单元、蓝色子像素单元以及白色子像素单元等，本实施例包括但不限于此。
例如，图3A为本实施例的另一示例提供的有机发光显示面板的一个子像素单元的等效电路示意图，图3B为具有图3A示出的等效电路的有机发光显示面板的局部平面示意性示图。如图3A-3B所示，每个子像素单元200包括三个发光区220，即第一发光区221、第二发光区222以及第三发光区226。例如，第一发光区221与驱动电路210分出的第一子输出端211连接、第二发光区222与驱动电路210分出的第二子输出端212连接、第三发光区226与驱动电路210分出的第三子输出端213连接。由于有机发光显示面板的数据线(或者电源线)通过驱动电路210与发光区220相连以向发光区220传输显示信号，因此，第一发光区221、第二发光区222以及第三发光区226在同一图像显示信号的控制下发出相同的图像光。
例如，每个子像素单元200中的驱动电路210中包括与第一子输出端211、第二子输出端212和第三子输出端213连接的薄膜晶体管(图中未示出)，第一子输出端211、第二子输出端212和第三子输出端213均连接到薄膜晶体管的漏极，因此，该薄膜晶体管的漏极可以看作驱动电路的输出端，本实施例包括但不限于此。
例如，如图3B所示，每个子像素单元200中的三个发光区220的面积相 等，即第一发光区221、第二发光区222以及第三发光区226的面积相等。
例如，如图3B所示，每个子像素单元200中发光区220围绕驱动电路210设置，本实施例包括但不限于此。当每个子像素单元200中包括至少三个发光区220时，发光区220围绕驱动电路210设置以使每个发光区220的面积相等，本实施例包括但不限于此。
例如，图4A为本实施例的另一示例提供的有机发光显示面板的一个子像素单元的等效电路示意图，图4B为具有图4A示出的等效电路的有机发光显示面板的局部平面示意性示图。如图4A-4B所示，每个子像素单元200包括四个发光区220，即第一发光区221、第二发光区222、第三发光区226以及第四发光区227。
例如，第一发光区221与驱动电路210分出的第一子输出端211连接、第二发光区222与驱动电路210分出的第二子输出端212连接、第三发光区226与驱动电路210分出的第三子输出端213连接，第四发光区227与驱动电路210分出的第四子输出端214连接。由于有机发光显示面板的数据线(或者电源线)通过驱动电路210与发光区220中的第一电极223相连以向发光区220传输显示信号，因此，第一发光区221、第二发光区222、第三发光区226以及第四发光区227在同一图像显示信号的控制下发出相同的图像光。
例如，如图4B所示，每个子像素单元200中的四个发光区220的面积相等，即第一发光区221、第二发光区222、第三发光区226以及第四发光区227的面积相等。
例如，如图4B所示，每个子像素单元200中发光区220围绕驱动电路210设置以使每个发光区220的面积相等，本实施例包括但不限于此。
例如，本实施例提供的有机发光显示面板中的每个子像素单元中包括的发光区数量还可以不相同，本实施例包括但不限于此。
本实施例提供的有机发光二极管的每个子像素单元中包括至少两个发光区，当任一发光区中产生坏点，并断开与该异常发光区连接的子输出端后，虽然包括该异常发光区的子像素单元的亮度密度基本保持不变，但该异常的子像素单元相对于正常的子像素单元的老化会快一些，因此，一个子像素单元包括的发光区越多，维修后的子像素单元相比于正常的子像素单元的老化差异越小。但一个子像素单元包括的发光区越多，子像素单元的开口率越小，因此需要根据工艺能力和有机发光显示面板的能力确定每个子像素单元中包括的发 光区的数量。
例如，考虑到牺牲开口率最小的情况，每个子像素单元包括两个发光区是比较优化的方案。
本公开另一实施例提供一种有机发光显示面板的制作方法，图5为本实施例提供的制作方法的示意性流程图，如图5所示，该制作方法包括：
S201：提供衬底基板。
例如，衬底基板的材料可以由玻璃、聚酰亚胺、聚碳酸酯、聚丙烯酸酯、聚醚酰亚胺、聚醚砜中的一种或多种材料制成，本实施例包括但不限于此。
S202：在衬底基板上形成多个子像素单元，其中，形成每个子像素单元包括形成驱动电路以及至少两个发光区，在每个子像素单元中，驱动电路的同一个输出端分出至少两个子输出端，至少两个发光区分别与不同的子输出端连接。
例如，在衬底基板上形成薄膜晶体管以及分别用于向驱动电路传输数据信号和扫描信号的数据线和扫描线。
例如，形成发光区包括形成第一电极、发光层和第二电极，第一电极与相应的子输出端连接。
需要说明的是，本实施例中与发光区连接的子输出端可以是发光区以外的第一电极，即，发光区中的第一电极位于该发光区以外的部分可以看作与该发光区的第一电极连接的子输出端，本实施例包括但不限于此。
例如，子输出端也可以是单独制作并用于连接发光区与驱动电路。
例如，每个子像素单元中的驱动电路中包括与子输出端连接的薄膜晶体管，至少两个子输出端连接到薄膜晶体管的漏极，因此，该薄膜晶体管的漏极可以看作驱动电路的输出端，本实施例包括但不限于此。
例如，每个子像素单元的发光区中的第一电极位于发光区以外的部分可以分别与薄膜晶体管的漏极连接，本实施例包括但不限于此。
例如，每个子像素单元的发光区中的第一电极位于发光区以外的部分还可以先电连接，然后再与薄膜晶体管的漏极连接。
例如，可以采用开口掩模板(Open Mask)制作发光层，该发光层位于整个有机发光显示面板上(如图2B所示)，但只有在发光区中的发光层同时连接到第一电极以及第二电极，因此，只有位于发光区中的发光层才能发光，本实施例包括但不限于此。例如，还可以采用精细金属掩模板(Fine Metal Mask， FMM)或者喷墨打印技术(Ink-Jet Printing，IJP)仅在位于发光区的位置制作发光层。
例如，每个子像素单元的发光区的第二电极可以为公用的电极层，本实施例包括但不限于此。
例如，第一电极可以为阳极，阳极作为有机发光显示面板正向电压的连接电极，具有较好的导电性能以及较高的功函数值，本实施例包括但不限于此。
例如，第二电极可以为阴极，阴极作为有机发光显示面板负向电压的连接电极，具有较好的导电性能和较低的功函数值，本实施例包括但不限于此。
例如，形成发光区还包括形成例如空穴传输层、电子传输层、空穴注入层、电子注入层、空穴阻挡层、电子阻挡层至少之一的功能层，本实施例包括但不限于此。
采用本实施例提供的制作方法制作的有机发光显示面板，由于数据线(或者电源线)通过驱动电路与发光区中的第一电极相连以向发光区传输显示信号，因此，每个子像素单元的所有发光区在同一图像显示信号的控制下发出相同的图像光。由于子像素单元中的至少两个发光区是并联的，当任一发光区中产生坏点时，断开该异常发光区与子输出端的连接后，该异常发光区所在的异常子像素单元中其他正常的发光区的电流密度增加，亮度增加，因此整个异常的子像素单元的亮度密度基本保持不变，因此，该异常的子像素单元的视觉亮度基本保持不变。
例如，每个子像素单元中的至少两个发光区的面积相等，因此，在子像素单元正常发光的情况下，每个发光区的等效阻抗以及电流密度相同，并且老化同步。
例如，每个子像素单元中包括两个发光区时，发光区位于驱动电路相对的两侧以使每个子像素单元中的两个发光区的面积相等，本实施例包括但不限于此。
例如，每个子像素单元中包括至少三个发光区时，每个子像素单元中发光区围绕驱动电路设置以使每个子像素单元中的所有发光区的面积相等，本实施例包括但不限于此。
例如，多个子像素单元包括不同颜色的子像素单元。例如，不同颜色的子像素单元可以包括红色子像素单元、绿色子像素单元、蓝色子像素单元以及白色子像素单元等，本实施例包括但不限于此。
例如，驱动电路可以为2T1C结构，即包括第一薄膜晶体管、第二薄膜晶体管以及存储电容，本实施例包括但不限于此。例如，驱动电路还可以为4T2C或4T1C结构等。
例如，本实施例提供的有机发光显示面板中的每个子像素单元中包括的发光区数量还可以不相同，本实施例包括但不限于此。
本实施例提供的有机发光二极管的每个子像素单元中包括至少两个发光区，由于子像素单元中的至少两个发光区是并联的，当任一发光区中产生坏点时，断开该异常发光区与子输出端的连接后，虽然包括该异常发光区的子像素单元的亮度密度基本保持不变，但该子像素单元相对于正常子像素单元的老化会快一些，因此，一个子像素单元包括的发光区越多，维修后的子像素单元相比于正常的子像素单元的老化差异越小。但一个子像素单元包括的发光区越多，子像素单元的开口率越小，因此，需要根据工艺能力和有机发光显示面板的能力确定每个子像素单元中发光区的数量。
本公开另一实施例提供一种显示装置，该显示装置包括上述实施例提供的任一种有机发光显示面板，该显示装置包括的子像素单元中的任一发光区中产生坏点时，通过断开该异常发光区与子输出端的连接，可以使包括该异常发光区的异常子像素单元发出的图像光的亮度基本保持不变。
例如，该显示装置可以为有机发光二极管等显示器件以及包括该显示装置的电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任何具有显示功能的产品或者部件，本实施例不限于此。
本公开另一实施例提供一种用于维修上述实施例提供的有机发光显示面板的维修方法，图6A-6C为本实施例提供的有机发光显示面板的维修方法示意图，如图6A-6C所示，当子像素单元200的发光区220中出现了短路情况410(或其他坏点情况)时，断开异常的子像素单元200中异常的发光区220与子输出端的连接，即，切断发光区220与驱动电路210之间的连接以确保没有电流流向阴极，防止恶化。
例如，通过断开异常发光区220与子输出端之间的连接线等方式以使两者之间没有电连接关系，其连接线可以是异常发光区220的电极的一部分，也可以是子输出端的一部分，本实施例对此不作限制。由于子像素单元200中的至少两个发光区是并联的，当任一发光区220中产生坏点时，断开该异常发光区220与子输出端的连接后，该异常发光区220所在的异常子像素单元200中其 他正常的发光区220的电流密度增加，亮度增加，因此整个异常的子像素单元200的亮度密度基本保持不变，因而，该异常的子像素单元200的视觉亮度基本保持不变。
例如，每个发光区220包括第一电极、发光层和第二电极，第一电极与相应的子输出端连接。需要说明的是，本实施例中与发光区连接的子输出端可以是发光区以外的第一电极，即，发光区中的第一电极位于发光区以外的部分可以分别看作子输出端，本实施例包括但不限于此。
例如，如图6A-6C所示，断开异常的子像素单元200中异常的发光区220与子输出端的连接包括：断开与异常的发光区220的第一电极连接的子输出端，例如，可以断开发光区220中的第一电极位于发光区220以外的部分以断开发光区220与驱动电路210的连接，本实施例包括但不限于此，只要异常发光区220与子输出端之间没有电连接关系即可。
例如，如图6A-6C所示，断开异常的子像素单元200中异常的发光区220与子输出端的连接包括：采用激光切断异常的子像素单元200中异常的发光区220与子输出端的连接，即激光切割位置420位于发光区220与驱动电路210之间。
例如，可以采用激光切割420的方式切断异常的发光区220中的第一电极位于该发光区220以外的部分以断开该发光区220与驱动电路210的连接。
当任一发光区中产生坏点时，断开该异常发光区与子输出端的连接后，该异常发光区所在的异常子像素单元中正常的发光区的电流密度增加，亮度增加，因此整个异常的子像素单元的亮度密度基本保持不变，因而，该异常的子像素单元的视觉亮度基本保持不变。
有以下几点需要说明：
(1)除非另作定义，本公开实施例以及附图中，同一标号代表同一含义。
(2)本公开实施例附图中，只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(3)为了清晰起见，在用于描述本公开的实施例的附图中，层或区域被放大。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于 此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (13)

  1. 一种有机发光显示面板，包括：
    衬底基板；
    多个子像素单元，位于所述衬底基板上；
    其中，每个所述子像素单元包括驱动电路以及至少两个发光区，在每个所述子像素单元中，所述驱动电路的同一个输出端分出至少两个子输出端，所述至少两个发光区分别与不同的子输出端连接以使不同发光区在同一图像显示信号的控制下发出相同的图像光。
  2. 根据权利要求1所述的有机发光显示面板，其中，每个所述子像素单元中的所述至少两个发光区的面积相等。
  3. 根据权利要求1或2所述的有机发光显示面板，其中，每个所述子像素单元中的所述至少两个发光区包括两个发光区。
  4. 根据权利要求3所述的有机发光显示面板，其中，每个所述子像素单元中的所述两个发光区分别位于所述驱动电路相对的两侧。
  5. 根据权利要求1或2所述的有机发光显示面板，其中，每个所述子像素单元中的所述至少两个发光区包括至少三个发光区，所述至少三个发光区围绕所述驱动电路设置。
  6. 根据权利要求1-5任一项所述的有机发光显示面板，其中，每个所述发光区包括第一电极、发光层和第二电极，所述第一电极与相应的所述子输出端连接。
  7. 根据权利要求1-6任一项所述的有机发光显示面板，其中，所述多个子像素单元包括不同颜色的子像素单元。
  8. 一种有机发光显示面板的制作方法，包括：
    提供衬底基板；
    在所述衬底基板上形成多个子像素单元，
    其中，形成每个所述子像素单元包括形成驱动电路以及至少两个发光区，在每个所述子像素单元中，所述驱动电路的同一个输出端分出至少两个子输出端，所述至少两个发光区分别与不同的子输出端连接以使不同发光区在同一图像显示信号的控制下发出相同的图像光。
  9. 根据权利要求8所述的有机发光显示面板的制作方法，其中，每个所 述子像素单元形成的所述至少两个发光区的面积相等。
  10. 根据权利要求8或9所述的有机发光显示面板的制作方法，其中，形成所述发光区包括形成第一电极、发光层和第二电极，所述第一电极与相应的所述子输出端连接。
  11. 一种显示装置，包括权利要求1-7任一项所述的有机发光显示面板。
  12. 一种如权利要求1-7任一项所述的有机发光显示面板的维修方法，包括：
    断开异常的所述子像素单元中的异常的所述发光区与所述子输出端的连接。
  13. 根据权利要求12所述的维修方法，其中，断开异常的所述子像素单元中的异常的所述发光区与所述子输出端的连接包括：采用激光切割的方式切断异常的所述子像素单元中的异常的所述发光区与所述子输出端的连接。
PCT/CN2018/074100 2017-06-27 2018-01-25 显示面板及其制作方法、维修方法以及显示装置 WO2019000930A1 (zh)

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