WO2017198008A1 - 电致发光显示器件、其制作方法及显示装置 - Google Patents

电致发光显示器件、其制作方法及显示装置 Download PDF

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Publication number
WO2017198008A1
WO2017198008A1 PCT/CN2017/080076 CN2017080076W WO2017198008A1 WO 2017198008 A1 WO2017198008 A1 WO 2017198008A1 CN 2017080076 W CN2017080076 W CN 2017080076W WO 2017198008 A1 WO2017198008 A1 WO 2017198008A1
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Prior art keywords
unit
light emitting
sub
pixel
display device
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PCT/CN2017/080076
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English (en)
French (fr)
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吴长晏
闫光
胡月
宋莹莹
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京东方科技集团股份有限公司
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Priority to US15/562,875 priority Critical patent/US10325961B2/en
Publication of WO2017198008A1 publication Critical patent/WO2017198008A1/zh

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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
    • H10K59/30—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
    • 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
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • 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
    • H10K50/813—Anodes characterised by their shape
    • 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
    • H10K50/822—Cathodes characterised by their shape
    • 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
    • H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
    • 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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • 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
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
    • 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
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/19—Tandem OLEDs

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to an electroluminescent display device, a method of fabricating the same, and a display device.
  • OLEDs organic electroluminescent display devices
  • the full color display of an OLED display device is generally realized by a red (R) green (G) blue (B) sub-pixel independent light emitting or a white light OLED combined with a color filter.
  • a high-precision Metal Metal Mask (FMM) technology is mainly used to prepare the light-emitting layer.
  • FMM technology has many difficulties, such as mask production, cleaning, deposition, etc., as well as the alignment and expansion of FMM in the process. This causes the color mixture of the display panel to be severe, the production yield is low, and the manufacturing cost is high.
  • the precision control of the FMM is difficult, which makes high-resolution OLED display panels difficult to implement.
  • the OLED uses a white light OLED in combination with a color filter, the color light is absorbed by the color filter, so that the effective light output is small, and the overall power consumption of the product is large.
  • OLED display devices can be classified into 1-cell OLED devices and stacked OLED devices. Specifically, as shown in FIG. 1, when a stacked OLED device is employed, a plurality of series-connected light-emitting units 03 are provided between the cathode 01 and the anode 02 (three series-connected light-emitting units are shown in FIG. 1). At the same brightness, the stacked OLED device has a higher lifetime than the conventional 1-cell OLED device, but the effective light output is less and the power consumption is still larger. Taking FIG.
  • R pixels about 1/6 of light energy is utilized; G pixels: about 1/6 of light energy is utilized; B pixels: about 2/3 of light energy is utilized; W pixels: about 100 % of the light energy is utilized. From this, it can be seen that the R pixel and the G pixel have higher power consumption with respect to other pixels, and less light is emitted.
  • embodiments of the present disclosure provide an electroluminescence display device, a method of fabricating the same, and a display device to at least reduce power consumption and improve resolution of a display device.
  • inventions provide an electroluminescent display device.
  • the electroluminescent display device includes a substrate substrate and a plurality of pixel units arranged in an array on the substrate substrate.
  • Each pixel unit includes a plurality of sub-pixel units.
  • Each pixel unit includes at least two light emitting layers connected in series.
  • at least one of the light-emitting layers has at least two light-emitting units arranged side by side and having different light-emitting colors.
  • at least one of the light emitting units is configured to be shared by adjacent two sub-pixel units of the corresponding pixel unit.
  • each pixel unit in each pixel unit, at least one luminescent layer has only one illuminating unit. Moreover, the light emitting unit is configured to be shared by each of the sub-pixel units of the corresponding pixel unit.
  • each pixel unit at least two light-emitting layers connected in series are stacked on each other. Further, each of the pixel units further includes: a charge generating layer between two adjacent light emitting layers; a first electrode located between the light emitting layer and the substrate substrate which are adjacent to the substrate; and a farthest from the liner a second electrode above the light emitting layer of the base substrate. Further, the first electrode includes a plurality of first sub-electrodes, each of which corresponds to each sub-pixel unit.
  • each of the pixel units further includes: a filter disposed on a light exiting side of the electroluminescent display device. Further, the filter includes a plurality of sub-filters respectively corresponding to each of the sub-pixel units.
  • each of the pixel units includes a first luminescent layer and a second luminescent layer.
  • the sub-pixel units in each pixel unit are a first sub-pixel unit, a second sub-pixel unit, a third sub-pixel unit, and a fourth sub-pixel unit, respectively.
  • the first light emitting layer includes the first light emitting unit and the second light emitting unit
  • the second light emitting layer includes the third light emitting unit.
  • the first light emitting unit is configured to be the first sub-pixel of the corresponding pixel unit
  • the unit and the second sub-pixel unit are shared.
  • the second light emitting unit is configured to be shared by the third sub-pixel unit and the fourth sub-pixel unit of the corresponding pixel unit.
  • the third light emitting unit is configured to be shared by each of the sub-pixel units of the corresponding pixel unit.
  • the illuminating colors of the first illuminating unit, the second illuminating unit, and the third illuminating unit are yellow, blue, and yellow, respectively.
  • the first light emitting unit and the second light emitting unit are both located under the third light emitting unit.
  • both the first lighting unit and the second lighting unit are located above the third lighting unit.
  • each of the pixel units includes a first luminescent layer, a second luminescent layer, and a third luminescent layer.
  • the sub-pixel units in each pixel unit are a first sub-pixel unit, a second sub-pixel unit, a third sub-pixel unit, and a fourth sub-pixel unit, respectively.
  • the first light emitting layer includes a first light emitting unit and a third light emitting unit;
  • the second light emitting layer includes a second light emitting unit and a fourth light emitting unit;
  • the third light emitting layer includes a fifth light emitting unit .
  • the first light emitting unit and the second light emitting unit are respectively configured to be shared by the first sub-pixel unit and the second sub-pixel unit of the corresponding pixel unit.
  • the third light emitting unit and the fourth light emitting unit are respectively configured to be shared by the third sub-pixel unit and the fourth sub-pixel unit of the corresponding pixel unit.
  • the fifth light emitting unit is configured to be shared by each of the sub-pixel units of the corresponding pixel unit.
  • the illumination of the first light emitting unit, the second light emitting unit, the third light emitting unit, the fourth light emitting unit, and the fifth light emitting unit The colors are yellow, yellow, blue, blue, and yellow.
  • the first light emitting unit and the third light emitting unit are both located above the fifth light emitting unit.
  • both the second lighting unit and the fourth lighting unit are located below the fifth lighting unit.
  • an embodiment further provides a method of fabricating the above electroluminescent display device.
  • an electroluminescent display device includes a substrate substrate and a plurality of pixel units arranged in an array on the substrate.
  • Each pixel unit includes multiple Sub-pixel units.
  • the manufacturing method includes forming at least two light emitting layers connected in series in each pixel unit.
  • the at least one luminescent layer has at least two illuminating units arranged side by side and having different illuminating colors.
  • at least one of the light emitting units is configured to be shared by adjacent two sub-pixel units of the corresponding pixel unit.
  • each pixel unit in each pixel unit, at least one luminescent layer has only one illuminating unit. Moreover, such a light emitting unit is configured to be shared by each of the sub-pixel units of the corresponding pixel unit.
  • the method for fabricating the above electroluminescent display device further includes: forming a charge generating layer between two adjacent light emitting monolayers disposed in a stack; Forming a first electrode between the light emitting layer adjacent to the base substrate and the base substrate; and forming a second electrode above the light emitting unit structure farthest from the base substrate.
  • the first electrode includes a plurality of first sub-electrodes respectively corresponding to each of the sub-pixel units.
  • an embodiment further provides a display device.
  • a display device includes the electroluminescent display device provided according to any of the above embodiments.
  • An embodiment of the present disclosure provides an electroluminescent display device, a method of fabricating the same, and a display device.
  • Such an electroluminescent display device includes: a substrate substrate, and a plurality of pixel units arranged in an array on the base substrate.
  • Each pixel unit includes a plurality of sub-pixel units.
  • Each pixel unit includes at least two light emitting layers connected in series. Further, in each pixel unit, at least one of the light emitting unit layers has at least two light emitting units arranged side by side and having different light emitting colors.
  • at least one of the light emitting units is configured to be shared by adjacent two sub-pixel units of the corresponding pixel unit.
  • the sub-pixel units it is not necessary for all of the sub-pixel units to emit white light. Conversely, some of the sub-pixel units can emit light of other colors. In this way, the light extraction efficiency can be effectively improved, and the overall power consumption of the product can be reduced. At the same time, under the same FMM accuracy, the resolution of the display device will be greatly improved.
  • FIG. 1 is a schematic structural view of a conventional electroluminescent display device
  • FIG. 2 is a schematic structural view of an electroluminescent display device according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram showing the structure of an electroluminescent display device according to another embodiment of the present disclosure.
  • FIG. 4 is a schematic structural view of an electroluminescent display device according to still another embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an electroluminescent display device according to other embodiments of the present disclosure.
  • 6a to 6e are respectively schematic structural views of an electroluminescent display device obtained after different steps of the method of fabricating the electroluminescent display device shown in Fig. 2.
  • the thickness and shape of the various film layers do not reflect the true proportions of the various components within the electroluminescent display device, the purpose of which is merely to schematically illustrate the present disclosure.
  • an embodiment provides an electroluminescence display device.
  • the electroluminescent display device may specifically include: a substrate substrate, and a plurality of pixel units arranged in an array on the base substrate.
  • Each pixel unit includes a plurality of sub-pixel units.
  • Each pixel unit comprises at least two luminescent layers 1 connected in series.
  • at least one of the light-emitting layers 1 has at least two light-emitting units 11 arranged side by side and having different light-emitting colors.
  • at least one of the light emitting units 11 is configured to be shared by adjacent two sub-pixel units of the corresponding pixel unit.
  • the projection of the at least one light emitting unit 11 on the base substrate covers the projection of two adjacent sub-pixel units on the base substrate.
  • the word “covering” in the above expression “projection of at least one light-emitting unit on a substrate substrate covering a projection of two adjacent sub-pixel units on a base substrate” can be understood as a position-corresponding relationship. That is, at least one of the light emitting units corresponds to the position of two adjacent sub-pixel units.
  • the “overlay” described below can be understood as a relationship corresponding to a position.
  • the "sub-pixel unit” herein is the smallest display unit in the electroluminescent display device. Each of the light emitting units may be slightly smaller than the minimum display unit due to the pixel defining layer.
  • the term “cover” does not mean to cover all, but can also be understood as a cover portion as long as the light-emitting unit corresponds to the position of the corresponding sub-pixel unit.
  • the expression "at least one light-emitting unit 11 configured to be shared by adjacent two sub-pixel units of a corresponding pixel unit” used in the description of the present disclosure may have a similar meaning Explanation.
  • At least one of the light emitting layers has at least two light emitting units arranged side by side and having different light emitting colors, and at least one light emitting layer is on the base substrate
  • the projection covers the projection of two adjacent sub-pixel units on the substrate.
  • each pixel unit is composed of four sub-pixel units, that is, a first sub-pixel unit, a second sub-pixel unit, a third sub-pixel unit, and a fourth sub-pixel unit.
  • each pixel unit includes two light-emitting layers 1 connected in series.
  • the light-emitting layer 1 located above has two light-emitting units 11 arranged side by side and having different light-emitting colors, and the light-emitting colors thereof may be set to yellow and blue, respectively.
  • the two lighting units 11 can also be other colors.
  • the projections of the two light emitting units 11 on the base substrate each cover the projection of two adjacent sub-pixel units on the base substrate. Taking FIG.
  • each pixel unit is composed of four sub-pixel units, that is, a first sub-pixel unit, a second sub-pixel unit, a third sub-pixel unit, and a fourth sub-pixel unit.
  • each pixel unit includes two light-emitting layers 1 connected in series.
  • the underlying luminescent layer 1 has two illuminating units 11 arranged side by side and having different illuminating colors, and the illuminating colors thereof may be set to yellow and blue, respectively. Of course, the two lighting units 11 can also be other colors.
  • the projections of the two light emitting units 11 on the base substrate each cover the projection of two adjacent sub-pixel units on the base substrate. Taking FIG.
  • each pixel unit is composed of four sub-pixel units.
  • Each pixel unit comprises three layers of luminescent layers 1 connected in series.
  • the light-emitting layer 1 located at the uppermost layer and the light-emitting layer 1 of the lowermost layer each have two light-emitting units 11 arranged side by side and having different light-emitting colors, and the light-emitting colors thereof may be set to yellow and blue, respectively. Of course, they can also be other colors.
  • the projections of the two light emitting units 11 on the base substrate cover the projection of two adjacent sub-pixel units on the base substrate.
  • a schematic structural view of three of the above electroluminescent display devices is briefly enumerated. It should be noted that the electroluminescent display device provided by the embodiments of the present disclosure may also be other structures as long as the above conditions are satisfied, and is not limited to the structure of the electroluminescent display device shown in the drawings of the present disclosure.
  • the above electroluminescent display device provided by the embodiment of the present disclosure, in order to further improve the light extraction efficiency of the display device, as shown in FIG. 2 to FIG. 4, in the same pixel unit, at least one of the light-emitting layers 1 has only one light-emitting unit 11. Moreover, the projection of the light emitting unit 11 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the light-emitting layer 1 located in the next layer has only one light-emitting unit 11.
  • the projection of the light emitting unit 11 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the illuminating color of the illuminating unit 11 may be set to yellow or may be other colors.
  • the light-emitting layer 1 located in the upper layer has only one light-emitting unit 11.
  • the projection of the light emitting unit 11 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the illuminating color of the illuminating unit may be set to yellow or other colors.
  • the light-emitting layer 1 located in the next layer has only one light-emitting unit 11.
  • the projection of the light emitting unit 11 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the illuminating color of the illuminating unit may be set to yellow or other colors.
  • each pixel unit may further include: two adjacent light-emitting layers 1 disposed in a stack.
  • the charge generation layer 2 is located between the first electrode 3 located between the light-emitting layer 1 closest to the substrate and the substrate, and the second electrode 4 located above the light-emitting layer 1 farthest from the substrate.
  • the first electrode 3 includes a plurality of first sub-electrodes corresponding to the respective sub-pixel units.
  • a layer which is a film layer often found in a light-emitting unit structure in an electroluminescent display device.
  • a hole injection layer a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer or an electron injection layer.
  • the light emitting unit referred to herein may be a layer of organic light emitting material.
  • each of the pixel units may further include a filter disposed on a light outgoing side of the electroluminescence display device.
  • the filter includes a plurality of sub-filters respectively corresponding to the respective sub-pixel units.
  • the electroluminescence display device is a bottom emission type electronic light-emitting display device, and its light-emitting side is below. Therefore, the filter CF can be disposed below the first electrode 3, But usually not the first electrode. When the light emitted by the light emitting unit passes through the filter CF, it can exhibit four colors of red, green, blue, and white.
  • R pixels about 1/2 of the light energy is utilized, which is about 3 times lower than that of the prior art
  • G pixels about 1/2 of the light energy is utilized, which is Compared with the power consumption, the technology is reduced by about 3 times
  • B pixel about 2/3 of the light energy is utilized, which is unchanged compared with the prior art
  • W pixel about 100% of the light energy is utilized, which is related to the prior art. Compared to no change. From this, it can be concluded that the power consumption of the R pixel and the G pixel is reduced and the light extraction efficiency is improved as compared with the prior art.
  • each pixel unit may be composed of four sub-pixel units.
  • Each of the pixel units may specifically include: a first light emitting unit, a second light emitting unit, and a third light emitting unit.
  • the projection of the first light emitting unit on the base substrate covers the projection of the first sub-pixel unit and the second sub-pixel unit on the base substrate.
  • the projection of the second light emitting unit on the base substrate covers the projection of the third sub-pixel unit and the fourth sub-pixel unit on the base substrate.
  • the projection of the third light emitting unit on the base substrate covers the projection of each of the sub-pixel units on the base substrate.
  • the first light emitting unit and the second light emitting unit are arranged side by side and the light emitting colors are different.
  • the illuminating colors of the first illuminating unit and the second illuminating unit may be set to yellow and blue, respectively, and the third illuminating unit Can be set to yellow.
  • other colors may also be used, and are not limited herein.
  • the first light emitting unit and the second light emitting unit are both located above the third light emitting unit.
  • both the first lighting unit and the second lighting unit are located below the third lighting unit.
  • each pixel unit may be composed of four sub-pixel units.
  • Each of the pixel units may specifically include: a first light emitting unit, a second light emitting unit, a third light emitting unit, a fourth light emitting unit, and a fifth light emitting unit.
  • the projections of the first light emitting unit and the second light emitting unit on the base substrate respectively cover the first sub-pixel unit and the second sub-pixel unit in the lining Projection on the base substrate.
  • the projections of the third light emitting unit and the fourth light emitting unit on the base substrate respectively cover the projection of the third sub-pixel unit and the fourth sub-pixel unit on the base substrate.
  • the projection of the fifth light emitting unit on the base substrate covers the projection of each of the sub-pixel units on the base substrate.
  • the first light emitting unit and the third light emitting unit are arranged side by side and the light emitting colors are different, and the second light emitting unit and the fourth light emitting unit are arranged side by side and the light emitting colors are different.
  • the illuminating colors of the first illuminating unit and the second illuminating unit may be set to yellow, the third illuminating unit and the fourth illuminating.
  • the illuminating colors of the cells may be set to blue, and the illuminating colors of the fifth illuminating unit may be set to yellow.
  • other colors may also be used, and are not limited herein.
  • the first light emitting unit and the third light emitting unit are both located above the fifth light emitting unit, and the second light emitting unit And the fourth lighting unit are both located below the fifth lighting unit.
  • the specific setting of the light-emitting units in the two light-emitting layers may be selected according to specific conditions, which is not limited herein.
  • an embodiment of the present disclosure also provides a method of fabricating the above electroluminescent display device. Since the principle of solving the problem is similar to the foregoing one of the electroluminescent display devices, the implementation of the method can be referred to the implementation of the electroluminescent display device, and the repeated description is omitted.
  • the electroluminescent display device includes: a substrate substrate, and a plurality of pixel units arranged in an array on the substrate substrate .
  • Each pixel unit includes a plurality of sub-pixel units.
  • the fabrication method includes the steps of forming at least two light-emitting layers connected in series in a region of each pixel unit, wherein at least one of the light-emitting layers has at least two light-emitting units arranged side by side and having different light-emitting colors.
  • the projection of the at least one light emitting unit on the base substrate covers the projection of two adjacent sub-pixel units on the base substrate.
  • At least one of the light emitting layers has only one light emitting unit in a region of each pixel unit.
  • the projection of the light emitting unit on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the above electroluminescent display device provided by an embodiment of the present disclosure
  • the manufacturing method further includes the steps of: forming a charge generating layer between two adjacent light emitting unit structures disposed in a stack; forming a first electrode between the light emitting layer closest to the base substrate and the base substrate; A second electrode is formed over the light emitting layer farthest from the base substrate.
  • the first electrode includes a plurality of first sub-electrodes respectively corresponding to the respective sub-pixel units.
  • Step 1 Form a pattern of the first electrode in a region of each of the sub-pixel units on the base substrate.
  • a pattern of the first electrode 100 is formed on the base substrate by a patterning process.
  • the four sub-pixel units are in one-to-one correspondence with the first electrode 100.
  • Step 2 forming a pattern of the first light-emitting layer in a region of each of the pixel units on the base substrate on which the first electrode pattern is formed.
  • the first luminescent layer has only one illuminating unit.
  • the projection of the light emitting unit on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • a pattern of the first light-emitting layer 200 is formed in a region of each pixel unit on the base substrate on which the first electrode 100 pattern is formed by a patterning process.
  • the first luminescent layer has only one first illuminating unit 201.
  • the projection of the first light emitting unit 201 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • a pattern (not shown) of the hole injection layer, the hole transport layer, and/or the electron blocking layer may be formed between the first electrode 100 and the first light emitting unit 201.
  • the surface of the first light emitting unit 201 may form a pattern of a hole blocking layer, an electron transport layer, and/or an electron injection layer (not shown).
  • Step 3 forming a pattern of the charge generating layer on the first layer of the light emitting unit structure formed in the area of each pixel unit.
  • a pattern of the charge generating layer 300 is formed on the first layer light emitting cell structure 200 formed in the region of each pixel unit by a patterning process.
  • the projection of the charge generating layer 300 on the substrate substrate covers the projection of each sub-pixel unit on the substrate substrate;
  • Step 4 forming a pattern of the second luminescent layer on the charge generating layer formed in the region of each pixel unit.
  • the second luminescent layer has two hairs arranged side by side and having different illuminating colors Light unit.
  • the projections of the two illumination units on the substrate substrate both cover the projection of two adjacent sub-pixel units on the substrate.
  • the second light emitting layer 400 is formed on the charge generating layer 300 formed in the region of each pixel unit by a patterning process.
  • the second luminescent layer 400 has two illuminating units arranged side by side and having different illuminating colors, that is, the second illuminating unit 401 and the third illuminating unit 402, respectively.
  • the projection of the second light emitting unit 401 on the base substrate covers the projection of the first sub-pixel unit and the second sub-pixel unit on the base substrate.
  • the projection of the third light emitting unit 402 on the base substrate covers the projection of the third sub-pixel unit and the fourth sub-pixel unit on the base substrate.
  • a pattern of a hole injection layer, a hole transport layer, and/or an electron blocking layer may be formed between the charge generation layer 300 and the second light emitting unit 401 / the third light emitting unit 402.
  • the surface of the second light emitting unit 401 / the third light emitting unit 402 may form a pattern of a hole blocking layer, an electron transport layer, and/or an electron injection layer.
  • Step 5 Form a pattern of the second electrode on the second luminescent layer formed in the region of each pixel unit.
  • a pattern of the second electrode 500 is formed on the second light emitting layer 400 formed in the region of each pixel unit.
  • the projection of the second electrode 500 on the base substrate covers the projection of each sub-pixel unit on the base substrate.
  • the above electroluminescent display device provided by the embodiment of the present disclosure has been fabricated through the above steps 1 to 5 provided by the specific examples.
  • an embodiment of the present disclosure further provides a display device including the electroluminescent display device provided by any of the above embodiments.
  • the display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • Other essential components of the display device are understood by those of ordinary skill in the art. It is not intended to be exhaustive or to limit the invention.
  • Embodiments of the present disclosure provide an electroluminescence display device, a method of fabricating the same, and a display device.
  • the electroluminescent display device includes: a substrate substrate; and a plurality of pixel units arranged in an array on the substrate substrate.
  • Each pixel unit includes a plurality of sub-pixel units.
  • Each pixel unit includes at least two light emitting layers connected in series. In the same pixel unit, at least one of the light-emitting layers has at least two light-emitting units arranged side by side and having different light-emitting colors. Projection of at least one light emitting unit on the base substrate covers two adjacent sub-pixel units on the base substrate Projection on.
  • the above electroluminescent display device does not require all sub-pixel units to emit white light. Conversely, some of the sub-pixel units can emit light of other colors. In this way, the light extraction efficiency can be effectively improved, and the overall power consumption of the product can be reduced. Moreover, under the same FMM accuracy, the resolution of the display device will be greatly improved.

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Abstract

一种电致发光显示器件、其制作方法及显示装置。电致发光显示器件包括：衬底基板、以及在衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。每个像素单元包括至少两个串联的发光层（1）。在每个像素单元中，至少一个发光层（1）具有并排设置且发光颜色不同的至少两个发光单元（11）。另外，在每个像素单元中，至少一个发光单元（11）配置成由对应像素单元的相邻两个子像素单元共用。根据实施例，这样的电致发光显示器件不需要所有子像素单元都发出白光。相反地，部分的子像素单元可以发出其它颜色的光。这样，可以有效提高出光效率，并且降低产品整体功耗。同时，在相同的FMM精度之下，可提高显示器件的分辨率。

Description

电致发光显示器件、其制作方法及显示装置 技术领域
本公开涉及显示技术领域，并且具体地公开了一种电致发光显示器件、其制作方法及显示装置。
背景技术
随着技术的发展，有机电致发光显示器件(Organic Electroluminesecent Display，OLED)凭借其低功耗、高色饱和度、广视角、薄厚度、能实现柔性化等优异性能，已经逐渐成为显示领域的主流。
目前，OLED显示器件的全彩色显示一般通过红(R)绿(G)蓝(B)子像素独立发光或白光OLED结合彩色滤光片等方式来实现。当OLED显示器件的RGB子像素采用并置排列方式时，当前主要采用高精度金属掩膜板(Fine Metal Mask，FMM)技术来制备发光层。FMM技术存在许多难点，如mask的制作、清洗、沉积等，以及制程中FMM的对位、膨胀等问题。这使得显示面板的混色现象严重、生产良率低落、制造成本昂贵。而且，FMM的精度控制比较困难，这就使得高分辨率的OLED显示面板难以实现。当OLED使用白光OLED结合彩色滤光片的方式时，由于彩色滤光片对白光的吸收，使得有效的出光很少，因而产品整体的功耗较大。
根据发光单元数目的不同，OLED显示器件可以分为1单元OLED器件和层叠式OLED器件。具体地，如图1所示，当采用层叠式OLED器件时，在阴极01和阳极02之间设有多个串联的发光单元03(在图1中示出了三个串联的发光单元)。在相同的亮度下，相较于传统1单元OLED器件，层叠式OLED器件的寿命比较高，但是有效的出光较少，功耗仍旧较大。以图1为例，R像素：约1/6的光能得到利用；G像素：约1/6的光能得到利用；B像素：约2/3的光能得到利用；W像素：约100％的光能得到利用。由此，可以看出，R像素和G像素相对于其它像素的功耗较大，出光较少。
因此，如何采用新的结构设计来降低产品功耗，提高分辨率，是本领域技术人员亟待解决的技术问题。
发明内容
有鉴于此，本公开的实施例提供了一种电致发光显示器件、其制作方法及显示装置，以便至少降低功耗，提高显示器件的分辨率。
在本公开的一个方面中，实施例提供了一种电致发光显示器件。该电致发光显示器件包括：衬底基板，以及位于衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。每个像素单元包括至少两个串联的发光层。在每一个像素单元中，至少一个发光层具有至少两个并排设置且发光颜色不同的发光单元。在每个像素单元中，至少一个发光单元配置成由对应像素单元的相邻两个子像素单元共用。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，在每个像素单元中，至少一个发光层仅具有一个发光单元。而且，该发光单元配置成由对应像素单元的每个子像素单元共用。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，在每个像素单元中，至少两个串联的发光层彼此层叠设置。进一步地，每个像素单元还包括：位于两个相邻的发光层之间的电荷产生层；位于最邻近衬底基板的发光层和衬底基板之间的第一电极；以及位于最远离衬底基板的发光层上方的第二电极。进一步地，第一电极包括多个第一子电极，每个第一子电极分别与每个子像素单元对应。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，每个像素单元还包括：设置在电致发光显示器件的出光侧的滤光片。进一步地，该滤光片包括分别与每个子像素单元对应的多个子滤光片。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，每个像素单元包括第一发光层和第二发光层。每个像素单元中的子像素单元分别为第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元。另外，在每个像素单元中，第一发光层包括第一发光单元和第二发光单元，并且第二发光层包括第三发光单元。具体地，第一发光单元配置成由对应像素单元的第一子像素 单元和第二子像素单元共用。第二发光单元配置成由对应像素单元的第三子像素单元和第四子像素单元共用。另外，第三发光单元配置成由对应像素单元的每个子像素单元共用。
在一种可能的实现方式中，在本公开的实施例提供的上述电致发光显示器件中，第一发光单元、第二发光单元和第三发光单元的发光颜色分别为黄色、蓝色和黄色。
在一种可能的实现方式中，在本公开的实施例提供的上述电致发光显示器件中，第一发光单元和第二发光单元均位于第三发光单元之下。可替换地，在另外的实施例中，第一发光单元和第二发光单元均位于第三发光单元之上。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，每个像素单元包括第一发光层、第二发光层和第三发光层。而且，每个像素单元中的子像素单元分别为第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元。进一步地，在每个像素单元中，第一发光层包括第一发光单元和第三发光单元；第二发光层包括第二发光单元和第四发光单元；并且第三发光层包括第五发光单元。具体地，第一发光单元和第二发光单元分别配置成由对应像素单元的第一子像素单元和第二子像素单元共用。第三发光单元和第四发光单元分别配置成由对应像素单元的第三子像素单元和第四子像素单元共用。另外地，第五发光单元配置成由对应像素单元的每个子像素单元共用。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，第一发光单元、第二发光单元、第三发光单元、第四发光单元和第五发光单元的发光颜色分别为黄色、黄色、蓝色、蓝色和黄色。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件，第一发光单元和第三发光单元均位于第五发光单元之上。可替换地，在另外的实施例中，第二发光单元和第四发光单元均位于第五发光单元之下。
根据本公开的另一方面，实施例还提供了一种上述电致发光显示器件的制作方法。具体地，这样的电致发光显示器件包括：衬底基板和位于衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多 个子像素单元。进一步地，该制作方法包括：在每个像素单元内形成至少两个串联的发光层。具体地，至少一个发光层具有至少两个并排设置且发光颜色不同的发光单元。而且，至少一个发光单元配置成由对应像素单元的相邻两个子像素单元共用。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件的制作方法，在每个像素单元中，至少一个发光层仅具有一个发光单元。而且，这样的发光单元配置成由对应像素单元的每个子像素单元共用。
在一种可能的实现方式中，根据本公开的实施例提供的上述电致发光显示器件的制作方法还包括：在层叠设置的两个相邻的发光单层之间形成电荷产生层；在最邻近衬底基板的发光层和衬底基板之间形成第一电极；以及在最远离衬底基板的发光单元结构的上方形成第二电极。进一步具体地，第一电极包括分别与每个子像素单元对应的多个第一子电极。
根据本公开的另外的方面，实施例还提供了一种显示装置。这样的显示装置包括根据以上任一个实施例所提供的电致发光显示器件。
本公开的实施例提供的一种电致发光显示器件、其制作方法及显示装置。这样的电致发光显示器件包括：衬底基板，以及在衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。每个像素单元包括至少两个串联的发光层。进一步地，在每个像素单元中，至少一个发光单元层具有至少两个并排设置且发光颜色不同的发光单元。另外，在每个像素单元中，至少一个发光单元配置成由对应像素单元的相邻两个子像素单元共用。根据本公开的实施例提供的上述电致发光显示器件，不需要所有子像素单元都发出白光。相反地，部分的子像素单元可以发出其它颜色的光。这样，可以有效提高出光效率，并且降低产品整体功耗。同时，在相同的FMM精度之下，将大幅提高显示器件的分辨率。
附图说明
图1为现有电致发光显示器件的结构示意图；
图2为根据本公开的实施例的电致发光显示器件的结构示意图；
图3为根据本公开的另一实施例的电致发光显示器件的结构示意 图；
图4为根据本公开的又一实施例的电致发光显示器件的结构示意图；
图5为根据本公开的其它实施例的电致发光显示器件的结构示意图；以及
图6a至图6e分别为根据图2所示的电致发光显示器件的制作方法的不同步骤之后所得到的电致发光显示器件的结构示意图。
具体实施方式
下面结合附图，对本公开的实施例提供的电致发光显示器件、其制作方法及显示装置的具体实施方式进行详细说明。
需要指出的是，在附图中，各个膜层的厚度和形状不反映电致发光显示器件内的各个组件的真实比例，其目的只是示意性说明本公开内容。
根据本公开的一个方面，实施例提供了一种电致发光显示器件。如图2至图4所示，该电致发光显示器件具体可以包括：衬底基板，以及在衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。每个像素单元包括至少两个串联的发光层1。具体地，在每个像素单元中，至少一个发光层1具有至少两个并排设置且发光颜色不同的发光单元11。此外，至少一个发光单元11配置成由对应像素单元的相邻两个子像素单元共用。换言之，至少一个发光单元11在衬底基板上的投影覆盖两个相邻的子像素单元在衬底基板上的投影。
需要说明的是，以上表述“至少一个发光单元在衬底基板上的投影覆盖两个相邻的子像素单元在衬底基板上的投影”中的词语“覆盖”可以理解为位置对应的关系。也就是说，至少一个发光单元与两个相邻的子像素单元的位置对应。以下所描述的“覆盖”都可以理解为位置对应的关系。这里的“子像素单元”为电致发光显示器件中的最小显示单元。每个发光单元可能由于像素限定层的原因而比最小显示单元稍小些。因此，“覆盖”一词并不意味着覆盖全部，也可以理解为覆盖部分，只要发光单元与相应的子像素单元位置对应即可。基于同样的原理，在本公开的描述中使用的表述“至少一个发光单元11配置成由对应像素单元的相邻两个子像素单元共用”可以以类似的含义来 解释。
根据本公开的实施例提供的上述电致发光显示器件，在同一像素单元中，至少一个发光层具有至少两个并排设置且发光颜色不同的发光单元，而且至少一个发光层在衬底基板上的投影覆盖两个相邻的子像素单元在衬底基板上的投影。这样，将不需要所有子像素单元都发出白光，而部分的子像素单元可以发出其它颜色的光。由此，可以有效提高出光效率，并且降低产品整体功耗。此外，在相同的FMM精度之下，将大幅提高显示器件的分辨率。
具体地，以图2为例，每个像素单元由四个子像素单元组成，即，第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元。而且，在叠层结构上，每个像素单元包括两个串联的发光层1。进一步地，位于上面的发光层1具有两个并排设置且发光颜色不同的发光单元11，其发光颜色分别可以设置为黄色和蓝色。当然，这两个发光单元11也可以是其它颜色。这两个发光单元11在衬底基板上的投影均覆盖两个相邻的子像素单元在衬底基板上的投影。以图3为例，每个像素单元由四个子像素单元组成，即，第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元。另外，在叠层结构上，各个像素单元包括两个串联的发光层1。具体地，位于下面的发光层1具有两个并排设置且发光颜色不同的发光单元11，其发光颜色分别可以设置为黄色和蓝色。当然，这两个发光单元11也可以是其它颜色。这两个发光单元11在衬底基板上的投影均覆盖两个相邻的子像素单元在衬底基板上的投影。以图4为例，每个像素单元由四个子像素单元组成。各个像素单元包括三层串联的发光层1。具体地，位于最上一层的发光层1和最下一层的发光层1均具有两个并排设置且发光颜色不同的发光单元11，其发光颜色分别可以设置为黄色和蓝色。当然，它们也可以是其它颜色。而且，这两个发光单元11在衬底基板上的投影均覆盖两个相邻的子像素单元在衬底基板上的投影。在此，简单列举了三个上述电致发光显示器件的结构示意图。需要说明的是，只要满足上述条件，本公开的实施例提供的电致发光显示器件还可以是其它结构，并且不限于本公开附图中示出的电致发光显示器件的结构。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，为了进一步提高显示器件的出光效率，如图2至图4所示，在 同一像素单元中，至少一个发光层1仅具有一个发光单元11。而且，发光单元11在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。
具体地，以图2为例，在同一像素单元中，位于下一层的发光层1仅具有一个发光单元11。而且，该发光单元11在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。该发光单元11的发光颜色可以设置为黄色，也可以是其它颜色。以图3为例，在同一像素单元中，位于上一层的发光层1仅具有一个发光单元11。而且，该发光单元11在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。该发光单元的发光颜色可以设置为黄色，也可以是其它颜色。以图4为例，在同一像素单元中，位于下一层的发光层1仅具有一个发光单元11。而且，该发光单元11在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。该发光单元的发光颜色可以设置为黄色，也可以是其它颜色。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，如图2至图4所示，各个像素单元还可以包括：位于层叠设置的两个相邻的发光层1之间的电荷产生层2，位于最邻近衬底基板的发光层1和衬底基板之间的第一电极3，以及位于最远离衬底基板的发光层1上方的第二电极4。进一步地，第一电极3包括与分别各个子像素单元对应的多个第一子电极。
需要说明的是，本公开的附图只是用于示意性地说明。为了有效提高显示器件的发光效率，发光单元11与第一电极3之间，发光单元11与第二电极4之间，以及发光单元11与电荷产生层2之间，一般还存在未标注的膜层，其是电致发光显示器件中的发光单元结构常具有的膜层。作为示例，例如空穴注入层，空穴传输层，电子阻挡层，空穴阻挡层，电子传输层或电子注入层。这些具体膜层可以有多种实现方式，在此不做限定。这里所指的发光单元可以为有机发光材料层。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，各个像素单元还可以包括设置在电致发光显示器件的出光侧的滤光片。进一步地，该滤光片包括分别与各个子像素单元对应的多个子滤光片。以图5为例，电致发光显示器件为底发射型电子发光显示器件，其出光侧在下方。因此，滤光片CF可以设置第一电极3的下方， 但是通常不是紧连着第一电极。当由发光单元发出的光通过滤光片CF时，其可以呈现出红色、绿色、蓝色和白色这四种颜色。在这样的情况下，R像素：约1/2的光能得到利用，这与现有技术相比功耗约降3倍；G像素：约1/2的光能得到利用，这与现有技术相比功耗约降3倍；B像素：约2/3的光能得到利用，这与现有技术相比没有变化；W像素：约100％的光能得到利用，这与现有技术相比没有变化。由此可以得出，相较于现有技术，R像素和G像素的功耗降低，并且出光效率得到提高。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，如图2和图3所示，每个像素单元可以由四个子像素单元组成。各个像素单元具体可以包括：第一发光单元、第二发光单元和第三发光单元。第一发光单元在衬底基板上的投影覆盖第一子像素单元和第二子像素单元在衬底基板上的投影。第二发光单元在衬底基板上的投影覆盖第三子像素单元和第四子像素单元在衬底基板上的投影。而且，第三发光单元在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。具体地，第一发光单元和第二发光单元并排设置且发光颜色不同。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，具体地，第一发光单元和第二发光单元的发光颜色分别可以设置为黄色和蓝色，并且第三发光单元可以设置为黄色。当然，也可以是其它颜色，在此不做限定。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，如图2所示，第一发光单元和第二发光单元均位于第三发光单元之上。可替换地，在另外的实施例中，如图3所示，第一发光单元和第二发光单元均位于第三发光单元之下。需要说明的是，对于两个发光层中的发光单元的具体设置，可以根据实际情况进行选择，在此不做限定。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，如图4所示，每个像素单元可以由四个子像素单元组成。各个像素单元具体可以包括：第一发光单元、第二发光单元、第三发光单元、第四发光单元和第五发光单元。第一发光单元和第二发光单元分别在衬底基板上的投影均覆盖第一子像素单元和第二子像素单元在衬 底基板上的投影。第三发光单元和第四发光单元分别在衬底基板上的投影均覆盖第三子像素单元和第四子像素单元在衬底基板上的投影。而且，第五发光单元在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。具体地，第一发光单元和第三发光单元并排设置且发光颜色不同，并且第二发光单元和第四发光单元并排设置且发光颜色不同。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，具体地，第一发光单元和第二发光单元的发光颜色可以均设置为黄色，第三发光单元和第四发光单元的发光颜色可以均设置为蓝色，而第五发光单元的发光颜色可以均设置为黄色。当然，也可以是其它颜色，在此不做限定。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件中，如图2a所示，第一发光单元和第三发光单元均位于第五发光单元之上，并且第二发光单元和第四发光单元均位于第五发光单元之下。需要说明的是，对于两个发光层中的发光单元的具体设置，可以根据具体情况进行选择，在此不做限定。
基于同一公开构思，本公开的实施例还提供了一种上述电致发光显示器件的制作方法。由于该方法解决问题的原理与前述一种电致发光显示器件相似，因此该方法的实施可以参见电致发光显示器件的实施，重复之处不再赘述。
根据具体实施例，在本公开的实施例提供的电致发光显示器件的制作方法中，该电致发光显示器件包括：衬底基板，以及位于衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。具体地，该制作方法包括以下步骤：在各个像素单元的区域内形成至少两个串联的发光层，其中至少一个发光层具有至少两个并排设置且发光颜色不同的发光单元。而且，至少一个发光单元在衬底基板上的投影覆盖两个相邻的子像素单元在衬底基板上的投影。
根据具体实施例，在本公开的实施例提供的上述电致发光显示器件的制作方法中，在各个像素单元的区域内，至少一个发光层仅具有一个发光单元。而且，发光单元在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。
根据具体实施例，本公开的实施例提供的上述电致发光显示器件 的制作方法，还具体包括以下步骤：在层叠设置的两个相邻的发光单元结构之间形成电荷产生层；在最邻近衬底基板的发光层和衬底基板之间形成第一电极；以及在最远离衬底基板的发光层的上方形成第二电极。进一步地，该第一电极包括分别与各个子像素单元对应的多个第一子电极。
下面以一个具体的实例详细说明本公开实施例提供的电致发光显示器件的制作方法。这样的制作方法具体包括如下步骤。
步骤一、在衬底基板上的各个子像素单元的区域内形成第一电极的图形。
具体地，如图6a所示，通过构图工艺在衬底基板上形成第一电极100的图形。此时，在同一像素单元中，四个子像素单元与第一电极100一一对应。
步骤二、在形成有第一电极图形的衬底基板上的各个像素单元的区域内形成第一发光层的图形。该第一发光层仅具有一个发光单元。而且，该发光单元在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。
具体地，如图6b所示，通过构图工艺在形成有第一电极100图形的衬底基板上的各个像素单元的区域内形成第一发光层200的图形。该第一发光层仅具有一个第一发光单元201。而且，该第一发光单元201在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。第一电极100与第一发光单元201之间可以形成空穴注入层、空穴传输层和/或电子阻挡层的图形(图中未标注)。第一个发光单元201的表面可以形成空穴阻挡层、电子传输层和/或电子注入层的图形(图中未标注)。
步骤三、在各个像素单元的区域内形成的第一层发光单元结构上形成电荷产生层的图形。
具体地，如图6c所示，通过构图工艺在各个像素单元的区域内形成的第一层发光单元结构200上形成电荷产生层300的图形。具体地，电荷产生层300在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影；
步骤四、在各个像素单元的区域内形成的电荷产生层上形成第二发光层的图形。该第二发光层具有两个并排设置且发光颜色不同的发 光单元。这两个发光单元在衬底基板上的投影均覆盖两个相邻的子像素单元在衬底基板上的投影。
具体地，如图6d所示，通过构图工艺在各个像素单元的区域内形成的电荷产生层300上形成第二发光层400。该第二发光层400具有两个并排设置且发光颜色不同的发光单元，即，分别为第二发光单元401和第三发光单元402。第二发光单元401在衬底基板上的投影覆盖第一子像素单元和第二子像素单元在衬底基板上的投影。第三发光单元402在衬底基板上的投影覆盖第三子像素单元和第四子像素单元在衬底基板上的投影。电荷产生层300与第二发光单元401/第三发光单元402之间可以形成空穴注入层、空穴传输层和/或电子阻挡层的图形。第二发光单元401/第三发光单元402的表面可以形成空穴阻挡层、电子传输层和/或电子注入层的图形。
步骤五、在各个像素单元的区域内形成的第二发光层上形成第二电极的图形。
具体地，如图6e所示，在各个像素单元的区域内形成的第二发光层400上形成第二电极500的图形。具体地，第二电极500在衬底基板上的投影覆盖每个子像素单元在衬底基板上的投影。
至此，经过具体实例提供的上述步骤一至步骤五，已经制作了本公开实施例提供的上述电致发光显示器件。
基于同一公开构思，本公开的实施例还提供了一种显示装置，包括上述任一实施例提供的电致发光显示器件。该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的。在此不做赘述，也不应作为对本公开的限制。该显示装置的实施可以参见上述电致发光显示器件的实施例，重复之处不再赘述。
本公开实施例提供了一种电致发光显示器件、其制作方法及显示装置。该电致发光显示装置包括：衬底基板，以及位于衬底基板上呈阵列排布的多个像素单元。每个像素单元包括多个子像素单元。各个像素单元包括至少两个串联的发光层。在同一像素单元中，至少一个发光层具有至少两个并排设置且发光颜色不同的发光单元。至少一个发光单元在衬底基板上的投影覆盖两个相邻的子像素单元在衬底基板 上的投影。本公开的实施例提供的上述电致发光显示器件不需所有子像素单元都发出白光。相反地，部分的子像素单元可以发出其它颜色的光。这样，可以有效提高出光效率，并且降低产品整体功耗。而且，在相同的FMM精度之下，将大幅提高显示器件的分辨率。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (15)

  1. 一种电致发光显示器件，包括：
    衬底基板，以及
    在所述衬底基板上呈阵列排布的多个像素单元，其中，
    每个像素单元包括至少两个串联的发光层，
    在每个像素单元中，至少一个发光层具有并排设置且发光颜色不同的至少两个发光单元，并且
    在每个像素单元中，至少一个发光单元配置成由对应像素单元的相邻两个子像素单元共用。
  2. 如权利要求1所述的电致发光显示器件，其中，在每个像素单元中，
    所述至少一个发光层仅具有一个发光单元，并且
    所述发光单元配置成由对应像素单元的每个子像素单元共用。
  3. 如权利要求1所述的电致发光显示器件，其中，
    在每个像素单元中，所述至少两个串联的发光层彼此层叠设置。
  4. 如权利要求3所述的电致发光显示器件，其中，每个像素单元还包括：
    位于两个相邻的发光层之间的电荷产生层，
    位于最邻近衬底基板的发光层和所述衬底基板之间的第一电极，以及
    位于最远离衬底基板的发光层上方的第二电极，
    其中，所述第一电极包括分别与每个子像素单元对应的多个第一子电极。
  5. 如权利要求1所述的电致发光显示器件，其中，每个像素单元还包括：设置在所述电致发光显示器件的出光侧的滤光片，所述滤光片包括分别与每个子像素单元对应的多个子滤光片。
  6. 如权利要求1-5中任一项所述的电致发光显示器件，其中，
    每个像素单元包括第一发光层和第二发光层；
    每个像素单元中的子像素单元分别为第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元；以及
    在每个像素单元中，第一发光层包括第一发光单元和第二发光单 元，并且第二发光层包括第三发光单元，所述第一发光单元配置成由对应像素单元的第一子像素单元和第二子像素单元共用，所述第二发光单元配置成由对应像素单元的第三子像素单元和第四子像素单元共用，以及所述第三发光单元配置成由对应像素单元的每个子像素单元共用。
  7. 如权利要求6所述的电致发光显示器件，其中，所述第一发光单元、所述第二发光单元和所述第三发光单元的发光颜色分别为黄色、蓝色和黄色。
  8. 如权利要求6所述的电致发光显示器件，其中，所述第一发光单元和第二发光单元均位于所述第三发光单元之下或者均位于所述第三发光单元之上。
  9. 如权利要求1-5中任一项所述的电致发光显示器件，其中，
    每个像素单元包括第一发光层、第二发光层和第三发光层；
    每个像素单元中的子像素单元分别为第一子像素单元、第二子像素单元、第三子像素单元和第四子像素单元；以及
    在每个像素单元中，第一发光层包括第一发光单元和第三发光单元，第二发光层包括第二发光单元和第四发光单元，并且第三发光层包括第五发光单元，所述第一发光单元和第二发光单元分别配置成由对应像素单元的第一子像素单元和第二子像素单元共用，所述第三发光单元和第四发光单元分别配置成由对应像素单元的第三子像素单元和第四子像素单元共用，并且所述第五发光单元配置成由对应像素单元的每个子像素单元共用。
  10. 如权利要求9所述的电致发光显示器件，其中，所述第一发光单元、所述第二发光单元、所述第三发光单元、所述第四发光单元和所述第五发光单元的发光颜色分别为黄色、黄色、蓝色、蓝色和黄色。
  11. 如权利要求9所述的电致发光显示器件，其中，
    所述第一发光单元和第三发光单元均位于所述第五发光单元之上，并且
    所述第二发光单元和第四发光单元均位于所述第五发光单元之下。
  12. 一种如权利要求1-11中任一项所述电致发光显示器件的制作方法，其中，所述电致发光显示器件包括：衬底基板和在所述衬底基 板上呈阵列排布的多个像素单元；
    该制作方法包括：
    在每个像素单元内形成至少两个串联的发光层，其中，
    至少一个发光层具有并排设置且发光颜色不同的至少两个发光单元；并且，
    至少一个发光单元配置成由对应像素单元的相邻两个子像素单元共用。
  13. 如权利要求12所述的制作方法，其中，在每个像素单元中，
    至少一个发光层仅具有一个发光单元，并且，
    所述发光单元配置成由对应像素单元的每个子像素单元共用。
  14. 如权利要求12所述的制作方法，还包括：
    在层叠设置的两个相邻的发光层之间形成电荷产生层；
    在最邻近衬底基板的发光层和所述衬底基板之间形成第一电极；以及
    在最远离衬底基板的发光层的上方形成第二电极，
    其中，所述第一电极包括分别与每个子像素单元对应的多个第一子电极。
  15. 一种显示装置，包括如权利要求1-11中任一项所述的电致发光显示器件。
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