WO2024239275A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2024239275A1
WO2024239275A1 PCT/CN2023/096042 CN2023096042W WO2024239275A1 WO 2024239275 A1 WO2024239275 A1 WO 2024239275A1 CN 2023096042 W CN2023096042 W CN 2023096042W WO 2024239275 A1 WO2024239275 A1 WO 2024239275A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting
display panel
sum
areas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2023/096042
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English (en)
French (fr)
Inventor
李璇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by BOE Technology Group Co Ltd, Chengdu BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to PCT/CN2023/096042 priority Critical patent/WO2024239275A1/zh
Priority to CN202380009199.1A priority patent/CN119586362A/zh
Priority to US18/706,146 priority patent/US20260007026A1/en
Publication of WO2024239275A1 publication Critical patent/WO2024239275A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • 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
    • H10K59/30—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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a display panel and a display device having the display panel.
  • OLED Organic Light Emitting Diode
  • red light emitting devices, green light emitting devices and blue light emitting devices are used to emit light, thereby achieving full-color display of OLED display products.
  • the luminous efficiency of red light emitting devices and green light emitting devices are both higher than that of blue light emitting devices.
  • a display panel includes a display area and a non-display area.
  • the display panel also includes a substrate and a light-emitting unit.
  • the light-emitting unit is located on one side of the substrate.
  • the light-emitting unit includes a plurality of light-emitting devices.
  • the plurality of light-emitting devices include a plurality of red light-emitting devices, a plurality of green light-emitting devices, and a plurality of blue light-emitting devices.
  • the sum of the light-emitting areas of the plurality of blue light-emitting devices accounts for a proportion of the area of the display area of the display panel that is greater than or equal to 4% and less than or equal to 25%.
  • the sum of the light emitting areas of the plurality of blue light emitting devices accounts for a proportion of the area of the display region of the display panel that is greater than or equal to 5% and less than or equal to 18%.
  • the ratio of the sum of the light emitting areas of the plurality of blue light emitting devices to the area of the display area of the display panel satisfies the following formula 1:
  • SB represents the ratio of the sum of the light-emitting areas of the multiple blue light-emitting devices to the area of the display area of the display panel;
  • L represents the maximum value of the working brightness of the blue light-emitting device under the first working condition;
  • J B represents the current density of the blue light-emitting device under the first working condition;
  • RO B represents the ratio of the current efficiency of the blue light-emitting device to decrease when the current density of the blue light-emitting device increases from 5mA/cm 2 to 10mA/cm 2 ;
  • f represents the maximum value of the external quantum efficiency of the blue light-emitting device, which is defined as the maximum value of the ratio of the number of photons radiated externally by the blue light-emitting device to the number of hole-electron pairs recombined in the blue light-emitting device.
  • the first working condition is: the abscissa value of the white light emitted by the display panel in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33, the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34, and the life of the blue light-emitting device is greater than or equal to 300h.
  • a ratio of the sum of the light emitting areas of the plurality of green light emitting devices to the sum of the light emitting areas of the plurality of red light emitting devices is greater than 1 and less than or equal to 4.
  • a ratio of the sum of the light emitting areas of the plurality of green light emitting devices to the sum of the light emitting areas of the plurality of red light emitting devices is greater than 1 and less than or equal to 3.
  • the ratio of the sum of the light emitting areas of the plurality of green light emitting devices to the sum of the light emitting areas of the plurality of red light emitting devices satisfies the following formula 2:
  • SG represents the ratio of the sum of the light-emitting areas of the multiple green light-emitting devices to the area of the display area of the display panel;
  • SR represents the ratio of the sum of the light-emitting areas of the multiple red light-emitting devices to the area of the display area of the display panel;
  • EG represents the current efficiency of the green light-emitting device when the current density is 10mA/ cm2 ;
  • ER represents the current efficiency of the red light-emitting device when the current density is 10mA/ cm2 ;
  • ROG represents the ratio of the current efficiency of the green light-emitting device to decrease when the current density of the green light-emitting device increases from 10mA/ cm2 to 20mA/ cm2 ;
  • ROR represents the ratio of the current efficiency of the red light-emitting device to decrease when the current density of the red light-emitting device increases from 10mA/ cm2 to 20mA/ cm2 ;
  • klim represents the maximum value of the ratio
  • the second operating condition is: the operating brightness of the display panel is greater than or equal to 100 nit and less than or equal to 800 nit, and the abscissa value of the white light emitted by the display panel in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33, and the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34.
  • the blue light emitting device includes at least one blue light emitting layer.
  • the light emitting material of the blue light emitting layer includes a metal complex.
  • the metal complex includes at least one of platinum, palladium, iridium, gold, nickel, silver, copper or cerium metal ligand elements.
  • the display panel further includes a pixel defining layer.
  • the pixel defining layer is located on the base substrate.
  • the pixel defining layer is provided with a plurality of light-emitting openings, the plurality of light-emitting openings include a plurality of first light-emitting openings, a plurality of second light-emitting openings, and a plurality of third light-emitting openings, the red light-emitting device covers the first light-emitting openings, the green light-emitting device covers the second light-emitting openings, and the blue light-emitting device covers the third light-emitting openings.
  • the ratio of the sum of the areas of the plurality of first light-emitting openings to the sum of the areas of the plurality of second light-emitting openings is substantially the same as the ratio of the sum of the light-emitting areas of the plurality of red light-emitting devices to the sum of the light-emitting areas of the plurality of green light-emitting devices.
  • the ratio of the sum of the areas of the multiple first light-emitting openings to the sum of the areas of the multiple third light-emitting openings is approximately the same as the ratio of the sum of the light-emitting areas of the multiple red light-emitting devices to the sum of the light-emitting areas of the multiple blue light-emitting devices.
  • the ratio of the sum of the areas of the multiple second light-emitting openings to the sum of the areas of the multiple third light-emitting openings is approximately the same as the ratio of the sum of the light-emitting areas of the multiple green light-emitting devices to the sum of the light-emitting areas of the multiple blue light-emitting devices.
  • the sum of the light emitting areas of the plurality of green light emitting devices accounts for 10% of the display area of the display panel.
  • the area ratio is greater than the area ratio of the sum of the light emitting areas of the multiple red light emitting devices to the display area of the display panel.
  • the area ratio of the sum of the light emitting areas of the multiple blue light emitting devices to the display area of the display panel is also greater than the area ratio of the sum of the light emitting areas of the multiple red light emitting devices to the display area of the display panel.
  • a ratio of the sum of the light emitting areas of the plurality of red light emitting devices to the sum of the light emitting areas of the plurality of blue light emitting devices is greater than or equal to 0.4 and less than or equal to 0.8.
  • a ratio of the sum of the light emitting areas of the plurality of green light emitting devices to the sum of the light emitting areas of the plurality of blue light emitting devices is greater than or equal to 0.8 and less than or equal to 1.5.
  • the ratio of the sum of the light emitting areas of the multiple blue light emitting devices to the sum of the light emitting areas of the multiple green light emitting devices and the light emitting areas of the multiple red light emitting devices is greater than or equal to 0.4 and less than or equal to 0.8.
  • the display area includes the light-emitting areas of the plurality of light-emitting devices and the non-light-emitting areas other than the light-emitting areas of the plurality of light-emitting devices.
  • the sum of the light-emitting areas of the plurality of blue light-emitting devices and the ratio of the area of the non-light-emitting area are greater than or equal to 4% and less than or equal to 75%.
  • the display panel further comprises a pixel defining layer.
  • the pixel defining layer is located on the base substrate and has a plurality of light-emitting openings.
  • the ratio of the sum of the areas of the plurality of light-emitting openings to the area of the non-light-emitting area is greater than or equal to 0.2 and less than or equal to 2.0.
  • a ratio of a sum of areas of the plurality of light emitting openings to an area of a display region of the display panel is greater than or equal to 0.15 and less than or equal to 0.65.
  • the display panel further comprises an anti-reflection layer.
  • the anti-reflection layer is located on a side of the light emitting unit away from the base substrate and is configured to deflect the light emitted from the light emitting device toward a direction close to perpendicular to the base substrate.
  • the display panel further comprises an optical function layer.
  • the optical function layer is located between the light emitting unit and the anti-reflection layer and is configured to refract the light emitted from the light emitting device into polarized light.
  • the display panel further comprises a light gain layer.
  • the light gain layer is located between the light emitting unit and the optical functional layer, and the light gain layer comprises at least one of a red light gain layer, a green light gain layer and a blue light gain layer sequentially stacked in a direction perpendicular to the substrate.
  • a display panel includes a display area and a non-display area.
  • the display panel also includes a base substrate, a pixel defining layer and a light-emitting unit.
  • the pixel defining layer is located on the base substrate, and the pixel defining layer is provided with a plurality of first light-emitting openings, a plurality of second light-emitting openings and a plurality of third light-emitting openings.
  • the light-emitting unit includes a plurality of light-emitting devices, and the plurality of light-emitting devices include a plurality of first color light-emitting devices, a plurality of second color light-emitting devices and a plurality of third color light-emitting devices.
  • the first color light-emitting device covers the first light-emitting opening
  • the second color light-emitting device covers the second light-emitting opening
  • the third color light-emitting device covers the third light-emitting opening.
  • the sum of the areas of the plurality of third light-emitting openings accounts for a proportion of the area of the display area of the display panel that is greater than Or equal to 4% and less than or equal to 25%.
  • the ratio of the sum of the areas of the plurality of third light emitting openings to the area of the display region of the display panel satisfies the following formula 1:
  • SB represents the ratio of the sum of the areas of the plurality of third light-emitting openings to the area of the display area of the display panel;
  • L represents the maximum value of the working brightness of the third color light-emitting device under the first working condition;
  • J B represents the current density of the third color light-emitting device under the first working condition;
  • RO B represents the ratio of the current efficiency of the third color light-emitting device to decrease when the current density of the third color light-emitting device increases from 5 mA/cm 2 to 10 mA/cm 2 ;
  • f represents the maximum value of the external quantum efficiency of the third color light-emitting device, which is defined as the maximum value of the ratio of the number of photons radiated externally by the third color light-emitting device to the number of hole-electron pairs recombined in the third color light-emitting device.
  • the first working condition is: the abscissa value of the white light emitted by the display panel in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33, the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34, and the life of the third color light-emitting device is greater than or equal to 300 hours.
  • the ratio of the sum of the areas of the plurality of second light emitting openings to the sum of the areas of the plurality of first light emitting openings satisfies the following formula 2:
  • SG represents the ratio of the sum of the areas of the multiple second light-emitting openings to the area of the display area of the display panel;
  • SR represents the ratio of the sum of the areas of the multiple first light-emitting openings to the area of the display area of the display panel;
  • EG represents the current efficiency of the second color light-emitting device when the current density is 10mA/ cm2 ;
  • ER represents the current efficiency of the first color light-emitting device when the current density is 10mA/cm2;
  • ROG represents the ratio of the current efficiency of the second color light-emitting device decreasing when the current density of the second color light-emitting device increases from 10mA/ cm2 to 20mA/ cm2 ;
  • ROR represents the ratio of the current efficiency of the first color light-emitting device decreasing when the current density of the first color light-emitting device increases from 10mA/ cm2 to 20mA/cm2;
  • klim represents the maximum value of the ratio between the operating current
  • the second operating condition is: the operating brightness of the display panel is greater than or equal to 100 nit and less than or equal to 800 nit, and the abscissa value of the white light emitted by the display panel in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33, and the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34.
  • a display device comprising a circuit board and a display panel as described in any one of the above embodiments, wherein the display panel is located on one side of the circuit board and is coupled to the circuit board.
  • FIG1 is a structural diagram of a display device according to some embodiments.
  • FIG. 2 is a perspective view of a display panel according to some embodiments.
  • FIG3 is a cross-sectional view of the display panel along line AA' according to the embodiment shown in FIG2;
  • 4 to 8 are diagrams showing the arrangement structures of sub-pixels in a display panel according to some embodiments.
  • 9A and 9B are cross-sectional views of the display panel along line AA' in FIG. 2 according to some embodiments;
  • FIG10 is a structural diagram of a light emitting device according to some embodiments.
  • 11 and 12 are structural diagrams of display panels according to some embodiments, respectively.
  • first and second are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features.
  • plural means two or more.
  • Coupled When describing some embodiments, the expressions “coupled” and “connected” and their derivatives may be used.
  • the term “connected” should be understood in a broad sense. For example, “connected” can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium.
  • the term “coupled” indicates, for example, that two or more components are in direct physical or electrical contact.
  • the term “coupled” or “communicatively coupled” may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other.
  • the embodiments disclosed herein are described in detail below. The examples are not necessarily limited to the contents herein.
  • At least one of A, B, and C has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • parallel includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°;
  • perpendicular includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°.
  • equal includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.
  • Exemplary embodiments are described herein with reference to cross-sectional views and/or plan views that are idealized exemplary drawings.
  • the thickness of the layers and the area of the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and/or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing.
  • an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.
  • the luminescent materials of blue light-emitting devices in OLED display panels include blue fluorescent materials and blue phosphorescent materials. Since blue phosphorescent materials have poor stability and short lifespan, while blue fluorescent materials have good stability, blue fluorescent materials are more widely used in blue light-emitting devices.
  • the inventors of the present disclosure have found through research that: in blue light-emitting devices, the exciton utilization rate of blue fluorescent light-emitting materials is low, resulting in low luminous efficiency of blue light-emitting devices in the display panel. Compared with blue fluorescent light-emitting materials, blue phosphorescent light-emitting materials greatly improve the exciton utilization rate, which can improve the luminous efficiency of blue light-emitting devices.
  • blue light-emitting devices made of blue phosphorescent light-emitting materials will accelerate the ionization of blue phosphorescent light-emitting materials on the basis of improving the luminous efficiency of blue light-emitting devices, resulting in faster attenuation of the luminous efficiency of blue light-emitting devices and shortened lifespan.
  • the display performance differences between red light-emitting devices, green light-emitting devices and blue light-emitting devices will gradually increase, resulting in a color shift phenomenon in the display device as the use time increases, and the color shift phenomenon of the display device will gradually worsen, reducing the display effect of the display device.
  • the embodiments of the present disclosure provide a display panel and a display device to overcome the above problems, which are described below respectively.
  • FIG. 1 is a structural diagram of a display device according to some embodiments.
  • the display device 1000 can be used to display an image or a picture.
  • the display device 1000 can be a small or medium-sized display device of a tablet computer, a smart phone, a head-mounted display, a car navigation unit, a camera, a vehicle-mounted center information display (CID), a watch-type display device or other wearable device, a personal digital assistant (PDA), a portable multimedia player (PMP) or a game console, as well as a medium or large electronic device such as a television, an external billboard, a monitor, a household appliance including a display screen, a personal computer or a laptop computer.
  • the above electronic devices can represent simple examples of application display devices, so those of ordinary skill in the art can recognize that the display device 1000 can also be other electronic devices without departing from the spirit and scope of the present disclosure.
  • the display device 1000 may include a display panel 100 and a circuit board 200, and the display panel 100 is coupled to the circuit board 200.
  • the circuit board 200 may be located on the backlight side of the display panel 100 (i.e., the side opposite to the display side of the display panel 100).
  • the circuit board 200 may be a flexible printed circuit board (FPC) or a printed circuit board.
  • the circuit board 200 may provide a light emitting data signal, and the display panel 100 emits light based on the light emitting data signal provided by the circuit board 200.
  • the circuit board 200 may include a processor, a memory, and a timer control register (TCON).
  • the processor may provide an image data signal, and the timer control circuit outputs a timer control signal to the display panel 100 based on the image data signal provided by the processor.
  • the processor may be a central processing unit (CPU) or other processing devices with data processing capabilities and/or instruction execution capabilities, such as a microprocessor or a programmable logic controller (PLC).
  • the memory may include an executable code, and the processor runs the executable code to perform circuit detection tasks.
  • Fig. 2 is a perspective view of a display panel according to some embodiments.
  • Fig. 3 is a cross-sectional view of a display panel along line AA' according to the embodiment shown in Fig. 2 .
  • the display panel 100 includes The display area AA (Active Area) includes a display area AA (Active Area) for displaying images and a non-display area SA that does not display images.
  • the display area AA is an effective display area that can realize the display function.
  • the non-display area SA surrounds at least one side of the display area AA (for example, one side; for example, all around, that is, including the upper and lower sides and the left and right sides).
  • the non-display area SA can enclose the display area AA and can be located outside the display area AA in at least one direction.
  • the above-mentioned display panel 100 can have a rectangular shape in a plan view, and can also have a circular, elliptical, diamond-shaped, trapezoidal, square or other shapes according to display needs.
  • the display panel 100 may include a gate driving subcircuit and a data driving subcircuit located in the non-display area SA.
  • the timing control circuit may provide timing control signals to the gate driving subcircuit and the data driving subcircuit, respectively, so that the gate driving subcircuit outputs a scan signal and the data driving subcircuit outputs a data signal.
  • the display panel 100 may include a substrate 10, a light emitting unit 20 and an encapsulation layer 30.
  • the light emitting unit 20 is located on one side of the substrate 10, and the encapsulation layer 30 is located on a side of the light emitting unit 20 away from the substrate 10.
  • the substrate 10 includes a plurality of repeatedly arranged pixel unit areas PU.
  • Each pixel unit area PU may include a first sub-pixel area P1, a second sub-pixel area P2, and a third sub-pixel area P3 that display different colors.
  • the first sub-pixel area P1 may be configured to display red light
  • the second sub-pixel area P2 may be configured to display green light
  • the third sub-pixel area P3 may be configured to display blue light.
  • the pixel unit area PU may further include a non-emission area P4.
  • the non-emission area P4 may be located between the first sub-pixel area P1 and the second sub-pixel area P2, between the second sub-pixel area P2 and the third sub-pixel area P3, and between the third sub-pixel area P3 and the first sub-pixel area P1.
  • 4 to 8 are diagrams showing the arrangement structures of sub-pixels in a display panel according to some embodiments.
  • a pixel unit area PU includes a first sub-pixel area P1, a second sub-pixel area P2, and a third sub-pixel area P3.
  • a first sub-pixel area P1, a second sub-pixel area P2, and a third sub-pixel area P3 can be spaced from each other and repeatedly arranged in the display area AA along a direction perpendicular to the base substrate 10.
  • one pixel unit area PU may include two sub-pixel areas displaying the same color, and the two sub-pixel areas displaying the same color may be arranged adjacent to each other.
  • one pixel unit area PU includes one red sub-pixel area R, two green sub-pixel areas G, and one blue sub-pixel area B, wherein the two green sub-pixel areas G in one pixel unit area PU may be arranged adjacent to each other.
  • a pixel unit area PU includes a first sub-pixel area P1, two second sub-pixel areas P2 and a third sub-pixel area P3.
  • a first sub-pixel area P1, two second sub-pixel areas P2 and a third sub-pixel area P3 can be arranged in a mutually spaced and repetitive manner in the display area AA.
  • the non-luminous area P4 can also be located Between the two second sub-pixel regions P2.
  • the base substrate 10 may be a single-layer structure or a laminated composite structure.
  • the base substrate 10 may be a flexible base substrate or a rigid base substrate.
  • the flexible substrate substrate may be a laminated composite structure.
  • the flexible substrate substrate may include a flexible base layer, a barrier layer, and a buffer layer stacked in sequence.
  • the flexible substrate substrate may include a first flexible base layer, a first barrier layer, a second flexible base layer, a second barrier layer, and a buffer layer stacked in sequence.
  • the size range of the barrier layer, the first barrier layer, and the second barrier layer in the direction perpendicular to the display panel 100 is greater than or equal to 5000 angstroms and less than or equal to 6000 angstroms (for example, 5000 angstroms, 5200 angstroms, 5500 angstroms, 5800 angstroms, or 6000 angstroms).
  • the size range of the buffer layer in the direction perpendicular to the display panel 100 is greater than or equal to 3500 angstroms and less than or equal to 4500 angstroms (for example, 3500 angstroms, 3800 angstroms, 4000 angstroms, 4300 angstroms, or 4500 angstroms).
  • the material of the flexible base layer, the first flexible base layer, and the second flexible base layer may include one or more of polyimide, polyethylene terephthalate, or polycarbonate.
  • the flexible substrate substrate may also be a single-layer structure.
  • the flexible substrate substrate may only include a flexible base layer.
  • the display panel 100 may include a plurality of pixel circuits located on the substrate 10.
  • a first pixel circuit S1, a second pixel circuit S2, and a third pixel circuit S3 may be included.
  • the first pixel circuit S1 is located in the first sub-pixel area P1
  • the second pixel circuit S2 is located in the second sub-pixel area P2
  • the third pixel circuit S3 is located in the third sub-pixel area P3.
  • the thin film transistor of at least one of the first pixel circuit S1, the second pixel circuit S2, and the third pixel circuit S3 may be located in the non-luminous area P4.
  • the structure of the pixel circuit includes various structures, which can be selected and set according to actual needs.
  • the pixel circuit may include: at least two transistors (represented by T) and at least one capacitor (represented by C).
  • the pixel circuit may have a structure such as "2T1C”, “6T1C”, “7T1C”, “6T2C” or "7T2C”.
  • the transistors used in the embodiments of the present disclosure may be thin film transistors or field effect transistors or other switching devices with the same characteristics.
  • the transistor of at least one of the first pixel circuit S1, the second pixel circuit S2 and the third pixel circuit S3 may be a thin film transistor including polysilicon or a thin film transistor including an oxide semiconductor.
  • the thin film transistor when it is a thin film transistor including an oxide semiconductor, it may have a top-gate thin film transistor structure.
  • the thin film transistor may be connected to a signal line, and the signal line includes but is not limited to a gate line, a data line and a power line.
  • the gate drive subcircuit may be connected to the pixel circuit through the gate line to provide various scanning signals
  • the data drive subcircuit may be connected to the pixel circuit through the data line to provide a data signal, so that the pixel circuit drives the light-emitting device to emit light.
  • the pixel circuit may further include a compensation subcircuit.
  • the compensation subcircuit may include an internal compensation subcircuit or an external compensation subcircuit.
  • the compensation subcircuit may include a transistor and a capacitor, etc.
  • the pixel circuit may also include a reset circuit, a light emitting control subcircuit, or a detection circuit, etc.
  • the specific material of the pixel circuit may include a conductive material and an insulating material.
  • the conductive material may include gold.
  • the insulating material may be an inorganic insulating material or an organic insulating material.
  • the inorganic insulating material may include silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide or titanium nitride.
  • the organic insulating material may be polyimide, acrylate, epoxy resin or polymethyl methacrylate.
  • the display panel 100 may include an insulating layer INL.
  • the insulating layer INL may be located on the first pixel circuit S1, the second pixel circuit S2, and the third pixel circuit S3.
  • the insulating layer INL may have a planarized surface.
  • the insulating layer INL may be formed of an organic layer.
  • the insulating layer INL may include an acrylic resin, an epoxy resin, an imide resin, an ester resin, or the like.
  • the insulating layer INL may have a through hole to expose the electrodes of the first pixel circuit S1, the second pixel circuit S2, and the third pixel circuit S3 so as to achieve electrical connection.
  • the display panel 100 may include a pixel defining layer PDL located on the base substrate 10.
  • the pixel defining layer PDL may be formed on the insulating layer INL and define a plurality of light emitting openings.
  • the plurality of light emitting openings may include a plurality of first light emitting openings K1, a plurality of second light emitting openings K2, and a plurality of third light emitting openings K3.
  • the plurality of first light emitting openings K1 may be located in the first sub-pixel region P1, and the first sub-pixel region P1 may be a red light emitting region; the plurality of second light emitting openings K2 may be located in the second sub-pixel region P2, and the second sub-pixel region P2 may be a green light emitting region; the plurality of third light emitting openings K3 may be located in the third sub-pixel region P3, and the third sub-pixel region P3 may be a blue light emitting region.
  • 9A and 9B are cross-sectional views of the display panel along line AA′ in FIG. 2 , respectively, according to some embodiments.
  • the light emitting unit 20 may be located on a side of the insulating layer INL away from the base substrate 10, and the light emitting unit 20 may include a plurality of light emitting devices.
  • the plurality of light emitting devices may include a plurality of first color light emitting devices, a plurality of second color light emitting devices, and a plurality of third color light emitting devices.
  • the first color light emitting device may be a red light emitting device 21
  • the second color light emitting device may be a green light emitting device 22
  • the third color light emitting device may be a blue light emitting device 23 .
  • the light emitting device may include a first electrode AE, at least one light emitting layer EML, and a second electrode CE sequentially stacked in a direction perpendicular to the base substrate 10 .
  • the display panel 100 may be a top-emitting display panel 100.
  • the first electrode AE is a reflective electrode that can reflect light, for example, the first electrode AE is an anode made of a material with a high work function.
  • the second electrode CE is a transmissive or semi-transmissive electrode that can transmit light, for example, the second electrode CE is a cathode made of a material with a low work function. In this way, a microcavity structure is formed between the anode and the cathode.
  • the first electrode AE may include a first electrode AE1 located in the first sub-pixel region P1 , a first electrode AE2 located in the second sub-pixel region P2 , and a first electrode AE3 located in the third sub-pixel region P3 .
  • the first electrode AE may include a laminated composite structure of transparent conductive oxide/metal/transparent conductive oxide.
  • the transparent conductive oxide material is, for example, ITO or IZO.
  • the metal material is, for example, Ag, Mg, Cu, Al, Pt, Pd, At least one of Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, In, Sn, Zn or Yb, or oxides thereof.
  • the anode structure is: ITO/Ag/ITO stacked structure.
  • the second electrode CE may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, or a compound or mixture thereof, for example, a mixture of Ag and Mg.
  • the light-emitting device may include one or more light-emitting layers EML.
  • the light-emitting device may be a stacked light-emitting device including two light-emitting layers EML.
  • the light-emitting device may be a stacked light-emitting device including three light-emitting layers EML. This is only an exemplary description of the light-emitting device and is not intended to limit the disclosed solution.
  • FIG. 10 is a structural diagram of a light emitting device according to some embodiments.
  • the light emitting device may include a first transport layer TL1, a light emitting layer EML, and a second transport layer TL2.
  • the first transport layer TL1 may be located between the light emitting layer EML and the first electrode AE, and the first transport layer TL1 is configured to transport holes from the first electrode AE to the light emitting layer EML.
  • the second transport layer TL2 may be located between the light emitting layer EML and the second electrode CE, and the second transport layer TL2 is configured to transport electrons from the second electrode CE to the light emitting layer EML. In this way, holes and electrons may be recombined in the light emitting layer EML, so that the light emitting layer EML emits light.
  • the first transmission layer TL1 and the second transmission layer TL2 can be a whole layer structure, or the first transmission layer TL1 and the second transmission layer TL2 can be a patterned structure covering the light-emitting opening.
  • a high-precision metal mask Fine Metal Mask, FMM
  • FMM Fe Metal Mask
  • a patterned structure of the first transmission layer TL1, a patterned structure of the light-emitting layer EML, a patterned structure of the second transmission layer TL2 and a patterned structure of the first electrode AE, or a patterned structure of the first transmission layer TL1, a patterned structure of the light-emitting layer EML, a patterned structure of the second transmission layer TL2 and a patterned structure of the first electrode AE can be formed by photolithography-isolation column technology. This is only an exemplary description and is not intended to limit the disclosed solution.
  • the first transport layer TL1 may include a hole injection layer HIL and a hole transport layer HTL.
  • the hole injection layer HIL is located between the first electrode AE and the hole transport layer HTL, and the hole injection layer HIL is configured to inject holes of the first electrode AE into the hole transport layer HTL.
  • the hole transport layer HTL is located between the hole injection layer HIL and the light-emitting layer EML, and the hole transport layer HTL is configured to transfer the holes injected by the hole injection layer HIL to the light-emitting layer EML, so that the holes recombine with electrons in the light-emitting layer EML to realize the light emission of the light-emitting layer EML.
  • the material of the hole injection layer HIL may include a P-type dopant and a hole transport material.
  • the P-type dopant may include any one or more of 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene, 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyano-p-benzoquinone (F4TCNQ), and 1,2,3-tris[(cyano)(4-cyano-2,3,5,6-tetrafluorophenyl)methylene]cyclopropane.
  • the material of the hole injection layer HIL may be the same, or the material of the hole injection layer HIL may be different.
  • the hole transport layer HTL material and the hole transport material can include any one or more of aromatic amine hole transport materials, dimethylfluorene hole transport materials, and carbazole hole transport materials. In different light-emitting devices, the hole transport layer HTL material can be the same or different.
  • the hole transport material may include 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB), N,N'-bis[ Any one or more of (3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (TPD), 4-phenyl-4'-(9-phenylfluoren-9-yl)triphenylamine (BAFLP), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (DFLDPBi), 4,4'-di(9-carbazolyl)biphenyl (CBP) and 9-phenyl-3-[4-(10-phenyl-9-anthracenyl)phenyl]-9H-carbazole (PCzPA).
  • PCzPA 4,4'-bis[N-(1-n
  • the first transport layer TL1 may further include a first exciton blocking layer BL1.
  • the first exciton blocking layer BL1 may be located between the hole transport layer HTL and the light emitting layer EML, and the first exciton blocking layer BL1 is configured to block electrons in the light emitting layer EML from moving toward the first electrode AE. Therefore, the first exciton blocking layer BL1 may also be referred to as an electron blocking layer EBL.
  • the material of the electron blocking layer EBL may include any one or more of an aromatic amine electron blocking material, a dimethylfluorene electron blocking material, or a carbazole electron blocking material.
  • the material of the electron blocking layer EBL may include any one or more of 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (TPD), 4-phenyl-4'-(9-phenylfluorene-9-yl)triphenylamine (BAFLP), 4,4'-bis[N-(9,9-dimethylfluorene-2-yl)-N-phenylamino]biphenyl (DFLDPBi), 4,4'-bis(9-carbazolyl)biphenyl (CBP), or 9-pheny
  • the second transport layer TL2 may include an electron injection layer EIL and an electron transport layer ETL.
  • the electron injection layer EIL is located between the electron transport layer ETL and the second electrode CE, and the electron injection layer EIL is configured to inject electrons provided by the second electrode CE into the electron transport layer ETL.
  • the electron transport layer ETL is located between the electron injection layer EIL and the light-emitting layer EML, and the electron transport layer ETL is configured to transfer the electrons injected by the electron injection layer EIL to the light-emitting layer EML, so that the electrons recombine with holes in the light-emitting layer EML to realize the light emission of the light-emitting layer EML.
  • the material of the electron injection layer EIL may include oxides and halides of alkali metals and alkaline earth metals or other materials with strong electron injection capability.
  • the material of the electron injection layer EIL may include Alq3, LiO2, CaO, CsO or CsF2.
  • the material of the electron transport layer ETL may include a triazine material with high electron mobility, or other materials with high electron mobility.
  • the second transport layer TL2 may further include a second exciton blocking layer BL2.
  • the second exciton blocking layer BL2 may be located between the electron transport layer ETL and the light emitting layer EML, and the second exciton blocking layer BL2 is configured to block holes in the light emitting layer EML from moving toward the second electrode CE. Therefore, the second exciton blocking layer BL2 may also be referred to as a hole blocking layer HBL.
  • the material of the hole blocking layer HBL may include an aromatic heterocyclic hole blocking material.
  • the aromatic heterocyclic hole blocking material may include a benzimidazole and its derivative hole blocking material, an imidazopyridine and its derivative hole blocking material, a benzimidazolophenanthridine derivative hole blocking material, a pyrimidine and its derivative hole blocking material, a triazine derivative hole blocking material, a pyridine and its derivative hole blocking material, a pyrazine and its derivative hole blocking material, Any one or more of quinoxaline and its derivatives hole blocking materials, oxadiazole and its derivatives hole blocking materials, quinoline and its derivatives hole blocking materials, isoquinoline derivatives hole blocking materials, phenanthroline derivatives hole blocking materials, diazaphosphotadiene hole blocking materials, phosphine oxide hole blocking materials, aromatic ketone hole blocking materials, lactam or borane hole blocking materials.
  • the material of the hole blocking layer HBL may include any one or more of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD), 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole-2-yl]benzene (OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4-biphenylyl)-1,2,4-triazole (TAZ), 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4-triazole (p-EtTAZ), bathophenanthroline (BPhen), (BCP) or 4,4'-bis(5-methylbenzoxazol-2-yl)stilbene (BzOs).
  • PBD 2-(4-biphenylyl
  • the material of the light-emitting layer EML may include one light-emitting material, or may include two or more light-emitting materials.
  • the material of the light-emitting layer EML may include a host material and a guest material, and the guest material may be doped into the host material to emit light.
  • the material of the light-emitting layer EML may also include a light-emitting material having a thermally activated delayed fluorescence property at room temperature, a light-emitting material having a fluorescence property at room temperature, or a light-emitting material having a phosphorescent property at room temperature.
  • the red light emitting device 21 may include at least one red light emitting layer EML1. It is understandable that the number of the red light emitting layer EML1 may be one or more.
  • the plurality of red light emitting layers EML1 may be stacked in sequence along a direction perpendicular to the base substrate 10.
  • the light emitting material of the red light emitting layer EML1 may include any one or more of a DCM-type red light emitting material and a metal complex-type red light emitting material.
  • the light-emitting material of the red light-emitting layer EML1 may include any one or more of 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminophenylvinyl)-4H-pyran (DCM), 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidine-9-enyl)-4H-pyran (DCJTB), bis(1-phenylisoquinoline) ⁇ iridium(III) acetylacetonate (Ir(piq)2(acac)), octaethylporphyrin platinum(II) (PtOEP) or bis(2-(2'-benzothienyl)pyridine-N,C3') ⁇ iridium(III) acetylacetonate (Ir(btp)2(acac)).
  • DCM 4-(dicyanomethylene)-2-methyl-6-(4
  • the green light emitting device 22 may include at least one green light emitting layer EML2. It is understandable that the number of green light emitting layers EML2 may be one or more. A plurality of green light emitting layers EML2 may be stacked in sequence along a direction perpendicular to the substrate 10.
  • the light emitting material of the green light emitting layer EML2 may include any one or more of coumarin dyes, quinacridone copper derivatives green light emitting materials, polycyclic aromatic hydrocarbon green light emitting materials, diamine anthracene derivatives green light emitting materials, carbazole derivatives green light emitting materials, or metal complex green light emitting materials.
  • the light-emitting material of the green light-emitting layer EML2 may include coumarin 6 (C-6), coumarin 545T (C-525T), quinacridone copper (QA), N,N’-dimethylquinacridone (DMQA), 5,12-diphenylnaphthonaphthone (DPT), N10,N10'-diphenyl-N10,N10'-diphthaloyl-9,9'-dianthracene-10,10'-diamine (abbreviated as: BA-NPB), tris(8-hydroxyquinoline)aluminum(III) (abbreviated as: Alq3), tris(2-phenylpyridine)iridium(III) (Ir(ppy)3) or acetylacetonate ⁇ di(2-phenylpyridine)iridium(III) (Ir(ppy)2(acac)).
  • C-6 coumarin 6
  • C-525T quinacridone copper
  • the blue light emitting device 23 includes at least one blue light emitting layer It can be understood that the number of the blue light emitting layer EML3 can be one or more.
  • the blue light emitting device 23 can be a stacked light emitting device including a plurality of blue light emitting layers EML3, and the plurality of blue light emitting layers EML3 can be stacked in sequence along a direction perpendicular to the base substrate 10.
  • the luminescent material of the blue light-emitting layer EML3 may include any one or more of a pyrene derivative blue luminescent material, an anthracene derivative blue luminescent material, a fluorene derivative blue luminescent material, a perylene derivative blue luminescent material, a styrylamine derivative blue luminescent material, and a metal complex blue luminescent material.
  • the metal complex blue luminescent material may include at least one of platinum, palladium, iridium, gold, nickel, silver, copper, or cerium metal ligand elements.
  • the metal complex blue luminescent material may include a platinum metal ligand element.
  • the metal complex blue luminescent material may include a copper metal ligand element and a cerium metal ligand element.
  • the light-emitting material of the blue light-emitting layer EML3 may include N1,N6-di([1,1'-biphenyl]-2-yl)-N1,N6-di([1,1'-biphenyl]-4-yl)pyrene-1,6-diamine, 9,10-di-(2-naphthyl)anthracene (ADN), 2-methyl-9,10-di-2-naphthylanthracene (MADN), 2,5,8,11-tetra-tert-butylperylene (TBPe), 4,4'-di[4-(diphenylamino)benzene [vinyl] biphenyl (BDAVBi), 4,4'-bis[4-(di-p-tolylamino)phenyl]biphenyl (DPAVBi), bis(4,6-difluorophenylpyridine-C2,N) ⁇ picolinyliridium
  • the light-emitting material of the blue light-emitting layer EML3 can be a metal complex including a platinum metal ligand element, such as 3-methyl-1-(3- ⁇ [9-(pyridin-2-yl)carbazole-2-yl]oxy ⁇ phenyl)-2,3-dihydro-1H-benzo[d]imidazol-2-ylidenecarbene platinum (II).
  • a platinum metal ligand element such as 3-methyl-1-(3- ⁇ [9-(pyridin-2-yl)carbazole-2-yl]oxy ⁇ phenyl)-2,3-dihydro-1H-benzo[d]imidazol-2-ylidenecarbene platinum (II).
  • the energy gap between the lowest occupied orbital (HOMO) and the highest unoccupied orbital (LUMO) of the metal complex blue light-emitting material is narrow, the energy level difference between the singlet state and the triplet state of the lowest excited carrier is small, and the hole transport performance and electron transport performance of the metal complex blue light-emitting material are better, so the use of the metal complex blue light-emitting material can improve the luminous efficiency of the blue light-emitting device 23.
  • a plurality of light-emitting devices respectively cover a plurality of light-emitting openings, and a plurality of light-emitting devices are respectively connected to a plurality of pixel circuits in a one-to-one correspondence.
  • a first color light-emitting device covers a first light-emitting opening
  • a second color light-emitting device covers a second light-emitting opening
  • a third color light-emitting device covers a third light-emitting opening.
  • the plurality of light emitting devices may include a plurality of red light emitting devices 21, a plurality of green light emitting devices 22, and a plurality of blue light emitting devices 23.
  • the red light emitting devices 21 may cover the first light emitting opening K1
  • the green light emitting devices 22 may cover the second light emitting opening K2
  • the blue light emitting devices 23 may cover the third light emitting opening K3.
  • the sum of the areas of the plurality of light emitting openings and the area of the display area AA of the display panel 100 are equal to The ratio is greater than or equal to 0.15 and less than or equal to 0.65 (e.g., 0.15, 0.18, 0.20, 0.22, 0.25, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, or 0.65).
  • the effective light-emitting area of the multiple light-emitting devices in the display panel 100 can be increased, thereby improving the light-emitting efficiency of the multiple light-emitting devices in the display panel 100.
  • the sum of the areas of the plurality of third light-emitting openings K3 accounts for a proportion of the area of the display area AA of the display panel 100 that is greater than or equal to 4% and less than or equal to 25% (for example, 4%, 6%, 8%, 10%, 12%, 15%, 17%, 18%, 20%, 22% or 25%).
  • the effective light-emitting area of the third color light-emitting device corresponding to the third light-emitting opening K3 in the display panel 100 can be increased, thereby improving the light-emitting efficiency and display brightness of the third color light-emitting device. Further, the ratio of the brightness of the third color light-emitting device in the display panel 100 attenuating over time is reduced, thereby improving the color shift phenomenon of the display panel 100 and improving the display effect of the display device 1000.
  • the ratio of the sum of the areas of the plurality of second light emitting openings K2 to the sum of the areas of the plurality of first light emitting openings K1 is greater than 1 and less than or equal to 4 (e.g., 1.1, 1.5, 1.8, 2.0, 2.3, 2.5, 2.8, 3, 3.5, 3.8, or 4).
  • a ratio of the sum of areas of the plurality of first light emitting openings K1 to the sum of areas of the plurality of third light emitting openings K3 is greater than or equal to 0.4 and less than or equal to 0.8 (eg, 0.4, 0.5, 0.6, 0.7, or 0.8).
  • the ratio of the sum of the areas of the second light emitting openings K2 to the sum of the areas of the third light emitting openings K3 is greater than or equal to 0.8 and less than or equal to 1.5 (eg, 0.8, 0.9, 1.0, 1.2, 1.4, or 1.5).
  • the ratio of the sum of the areas of the plurality of third light-emitting openings K3 to the sum of the areas of the plurality of first light-emitting openings K1 and the plurality of second light-emitting openings K2 is greater than or equal to 0.4 and less than or equal to 0.8 (e.g., 0.4, 0.5, 0.6, 0.7 or 0.8).
  • the life of the third color light emitting device is the time LT95 required for the brightness of the third color light emitting device to decay to 95% of the specific initial brightness when the display panel 100 emits white light of a specific initial brightness.
  • the effective light-emitting area of the plurality of third color light-emitting devices in the display panel 100 can be maximized on the basis of ensuring the third color light-emitting device and limiting the decay rate of the light-emitting efficiency of the third color light-emitting device.
  • the light-emitting efficiency and display brightness of the third color light-emitting device are improved.
  • the ratio of the brightness decay of the third color light-emitting device in the display panel 100 over time is reduced, thereby improving the color shift phenomenon of the display panel 100 and improving the display effect of the display device 1000.
  • the ratio of the sum of the areas of the plurality of second light emitting openings K2 to the sum of the areas of the plurality of first light emitting openings K1 satisfies the following formula 2:
  • SG represents the ratio of the sum of the areas of the plurality of second light-emitting openings K2 to the area of the display area AA of the display panel 100;
  • SR represents the ratio of the sum of the areas of the plurality of first light-emitting openings K1 to the area of the display area AA of the display panel 100;
  • EG represents the current efficiency of the second color light-emitting device when the current density is 10 mA/ cm2 , in cd/A;
  • ER represents the current efficiency of the first color light-emitting device when the current density is 10 mA/ cm2 , in cd/A;
  • ROG represents the ratio of the current efficiency of the second color light-emitting device decreasing when the current density of the second color light-emitting device increases from 10 mA/ cm2 to 20 mA/ cm2 ;
  • ROR represents the ratio of the current efficiency of the first color light-emitting device decreasing when the current density of the first color light-emitting device increases
  • the second operating condition is: the operating brightness of the display panel 100 is greater than or equal to 100 nit and less than or equal to 800 nit (for example, 100 nit, 200 nit, 400 nit, 600 nit or 800 nit), and the abscissa value of the white light emitted by the display panel in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33 (for example, 0.30, 0.31, 0.32 or 0.33), and the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34 (for example, 0.31, 0.32, 0.33 or 0.34).
  • the ratio of the attenuation of the luminous efficiency of the first color light-emitting device and the attenuation of the second color light-emitting device can be accurately defined.
  • the ratio of light efficiency decay and the ratio of the working current of the second color light emitting device to the working current of the first color light emitting device can make the ratio of the brightness decay of the first color light emitting device and the ratio of the brightness decay of the second color light emitting device in the display panel 100 close to each other.
  • the ratio of the brightness decay of the first color light emitting device and the ratio of the brightness decay of the second color light emitting device in the same display panel 100 can be adapted to the ratio of the brightness decay of the third color light emitting device, thereby ensuring that the color gamut of the display panel 100 covers the color gamut standard of the National Television Standards Committee (NTSC for short), and improving the color shift phenomenon of the display panel 100, and improving the stability and display effect of the display performance of the display panel 100.
  • the light emitting area of the light emitting device can be understood as the area of the light emitting opening corresponding to the light emitting device.
  • the sum of the light emitting areas of multiple red light emitting devices 21 can be understood as the sum of the light emitting areas of all red light emitting devices 21 in a display panel 100.
  • the sum of the light emitting areas of the plurality of green light emitting devices 22 can be understood as the sum of the light emitting areas of all green light emitting devices 22 in a display panel 100.
  • the sum of the light emitting areas of the plurality of blue light emitting devices 23 can be understood as the sum of the light emitting areas of all blue light emitting devices 23 in a display panel 100.
  • the ratio of the sum of the areas of the first light emitting openings K1 to the sum of the areas of the second light emitting openings K2 is substantially the same as the ratio of the sum of the light emitting areas of the red light emitting devices 21 to the sum of the light emitting areas of the green light emitting devices 22 .
  • the ratio of the area of the first light-emitting opening K1 to the light-emitting area of the red light-emitting device 21 can be made substantially the same as the ratio of the area of the second light-emitting opening K2 to the light-emitting area of the green light-emitting device 22, thereby making the ratio of the effective light-emitting area of the red light-emitting device 21 defined by the area of the first light-emitting opening K1 to the light-emitting area of the red light-emitting device 21 the same as the ratio of the effective light-emitting area of the green light-emitting device 22 defined by the area of the second light-emitting opening K2 to the light-emitting area of the green light-emitting device 22, thereby reducing the difference between the display performance of the red light-emitting device 21 and the display performance of the green light-emitting device 22 in the same display panel 100, thereby improving the stability of the display performance of the display panel 100.
  • the ratio of the area of the first light-emitting opening K1 to the light-emitting area of the red light-emitting device 21 can be made substantially the same as the ratio of the area of the third light-emitting opening K3 to the light-emitting area of the blue light-emitting device 23, thereby making the ratio of the effective light-emitting area of the red light-emitting device 21 defined by the area of the first light-emitting opening K1 to the light-emitting area of the red light-emitting device 21 the same as the ratio of the effective light-emitting area of the blue light-emitting device 23 defined by the area of the third light-emitting opening K3 to the light-emitting area of the blue light-emitting device 23, thereby reducing the difference between the display performance of the red light-emitting device 21 and the display performance of the blue light-emitting device 23 in the same display panel 100, thereby improving the stability of the display performance of the display panel 100.
  • the ratio of the area of the second light-emitting opening K2 to the light-emitting area of the green light-emitting device 22 can be made substantially the same as the ratio of the area of the third light-emitting opening K3 to the light-emitting area of the blue light-emitting device 23, so that the ratio of the effective light-emitting area of the green light-emitting device 22 defined by the area of the second light-emitting opening K2 to the light-emitting area of the green light-emitting device 22 is the same as the ratio of the effective light-emitting area of the blue light-emitting device 23 defined by the area of the third light-emitting opening K3 to the light-emitting area of the blue light-emitting device 23, which can reduce the difference between the display performance of the green light-emitting device 22 and the display performance of the blue light-emitting device 23 in the same display panel 100, thereby improving the stability of the display performance of the display panel 100.
  • the sum of the light-emitting areas of the plurality of blue light-emitting devices 23 accounts for a ratio of greater than or equal to 4% and less than or equal to 25% (e.g., 4%, 6%, 8%, 10%, 12%, 15%, 17%, 18%, 20%, 22% or 25%) of the area of the display region of the display panel 100.
  • the effective light emitting area of the multiple blue light emitting devices 23 in the display panel 100 can be increased, thereby improving the luminous efficiency of the blue light emitting devices 23 and the display brightness of the blue light in the display panel 100, thereby reducing the ratio of the brightness of the blue light emitting devices 23 in the display panel 100 that decays over time, thereby improving the color rendering shift phenomenon of the display panel 100 and improving the display effect of the display device 1000.
  • the sum of the light-emitting areas of the plurality of blue light-emitting devices 23 accounts for a proportion of the area of the display region of the display panel 100 that is greater than or equal to 5% and less than or equal to 18% (e.g., 5%, 7%, 9%, 11%, 13%, 15%, 16% or 18%).
  • SB represents the ratio of the sum of the light-emitting areas of the plurality of blue light-emitting devices 23 to the area of the display area of the display panel 100;
  • L represents the maximum working brightness of the blue light-emitting device 23 under the first working condition;
  • J B represents the current density of the blue light-emitting device 23 under the first working condition, in A/m 2 ;
  • RO B represents the ratio of the current efficiency of the blue light-emitting device 23 to decrease when the current density of the blue light-emitting device 23 increases from 5 mA/cm 2 to 10 mA/cm 2 ;
  • f represents the maximum external quantum efficiency of the blue light of the display panel 100, which is defined as the ratio of the number of photons radiated externally by the blue light-emitting device to the number of photons emitted by the blue light-emitting device.
  • the wavelength of the blue light is greater than or equal to 440 nm and less than or equal to 480 nm (eg
  • the first operating condition is that the abscissa value of the white light emitted by the display panel 100 in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33 (for example, 0.30, 0.31, 0.32 or 0.33), the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34 (for example, 0.31, 0.32, 0.33 or 0.34), and the life of the blue light emitting device 23 is greater than or equal to 300h (for example, 300h, 320h, 350h, 380h or 400h).
  • the life of the blue light emitting device 23 is the time LT95 required for the brightness of the blue light emitting device 23 to decay to 95% of the specific initial brightness when the display panel 100 emits white light of a specific initial brightness.
  • the method for measuring f comprises: adjusting the display panel 100 to a blue display screen (i.e., only lighting up the multiple blue light-emitting devices 23 in the display panel 100); then, placing the display panel 100 in an integrating sphere tester, and calibrating the set ratio of the luminous intensity of the blue light-emitting device 23 and the number of externally radiated photons of the blue light-emitting device 23 in the integrating sphere tester; obtaining the value of the luminous intensity of the multiple blue light-emitting devices 23 in the display panel 100 when emitting in all directions through the integrating sphere tester; then, obtaining the number of externally radiated photons n1 of the multiple blue light-emitting devices 23 in the display panel 100 by calculating the ratio between the value of the luminous intensity of the multiple blue light-emitting devices 23 when emitting in all directions obtained by the integrating sphere tester and the set ratio between the luminous intensity of the blue light-emitting device 23 and the number of externally radiated photons of
  • the process of determining the relevant parameters L and J B of the blue light emitting device 23 in Formula 1 may include: first, when the initial white light color coordinate value CIE of the display panel 100 is (0.30, 0.31), testing the current density and brightness of the blue light emitting device 23.
  • the abscissa value of the color coordinate of the white light emitted by the display panel 100 is greater than or equal to 0.30 and less than or equal to 0.33 (for example, 0.30, 0.31, 0.32 or 0.33), and the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34 (for example, 0.31, 0.32, 0.33 or 0.34)
  • the time LT95 required for the luminance of the blue light emitting device 23 to decay to 95% of the initial luminance under the white light emitting state of a specific initial luminance (for example, 1000 nit) is tested. If the color coordinate value corresponding to the white light emitted by the display panel 100 is out of range, the specific initial luminance of the white light must be reduced and retested.
  • the maximum value of the working brightness of the blue light emitting device 23 is calculated by the stretched exponential decay (SED) model, that is, the value of L is obtained.
  • SED stretched exponential decay
  • L represents the relative luminous intensity of the blue light-emitting device 23 at a specific time t, and L0 is the luminous intensity at the initial moment;
  • ⁇ represents the characteristic index of the blue light-emitting device 23, and ⁇ is a constant of 0 to 1;
  • t95 is the time required for the luminous brightness of the blue light-emitting device 23 to decay to 95% of the initial brightness, that is, LT95;
  • C represents the set value in the process of testing the light-emitting device;
  • n represents the luminous brightness attenuation factor of the blue light-emitting device 23, and n is related to the structure and material properties of the blue light-emitting device 23.
  • the luminous brightness and LT95 of different blue light-emitting devices 23 can be
  • the value range of L is greater than or equal to 100 nit and less than or equal to 800 nit, for example, L is 100 nit, 200 nit, 400 nit, 600 nit or 800 nit.
  • the working brightness of the blue light emitting device 23 can be 400 nit or 800 nit, then the value of L is 800 nit.
  • the effective light-emitting area of the multiple blue light-emitting devices 23 in the display panel 100 can be maximized on the basis of ensuring the life of the blue light-emitting device 23 and limiting the attenuation rate of the luminous efficiency of the blue light-emitting device 23, thereby improving the luminous efficiency of the blue light-emitting device 23 and the display brightness of the blue light in the display panel 100, reducing the workload of the blue light-emitting device 23, and further reducing the ratio of the brightness of the blue light-emitting device 23 to decay over time, thereby improving the color deviation phenomenon of the display panel 100 and improving the display effect of the display device 1000.
  • the display area AA includes a light-emitting area of a plurality of light-emitting devices and a non-light-emitting area other than the light-emitting area of the plurality of light-emitting devices.
  • the area of the light-emitting area of the light-emitting device can be understood as the area corresponding to the light-emitting opening of the light-emitting device, that is, the light-emitting area of the light-emitting device.
  • the area of the non-luminous area accounts for a proportion of the area of the display area of the display panel 100 that is greater than or equal to 35% and less than or equal to 82% (for example, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 72%, 75%, 78%, 80% or 82%).
  • the ratio of the sum of the areas of the multiple light-emitting openings to the area of the non-light-emitting region is greater than or equal to 0.2 and less than or equal to 2.0 (e.g., 0.2, 0.22, 0.25, 0.30, 0.35, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.2, 1.5, 1.6, 1.8 or 2.0).
  • the effective light-emitting area of the plurality of light-emitting devices in the display panel 100 can be increased, thereby improving the efficiency of the plurality of light-emitting devices in the display panel 100.
  • the luminous efficiency of the device By limiting the ratio of the sum of the areas of the plurality of light-emitting openings to the area of the non-light-emitting region within a suitable range, the effective light-emitting area of the plurality of light-emitting devices in the display panel 100 can be increased, thereby improving the efficiency of the plurality of light-emitting devices in the display panel 100.
  • the luminous efficiency of the device is limiting the ratio of the sum of the areas of the plurality of light-emitting openings to the area of the non-light-emitting region within a suitable range.
  • the ratio of the sum of the light-emitting areas of multiple blue light-emitting devices 23 to the area of the non-luminous area can be greater than or equal to 4% and less than or equal to 75% (for example, 4%, 8%, 10%, 15%, 20%, 22%, 25%, 28%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70% or 75%).
  • the brightness of the blue light emitted by the multiple blue light emitting devices 23 in the display panel 100 can be relatively improved, the phenomenon of weak brightness of the blue light in the display panel 100 can be improved, and the ratio of the brightness of the blue light emitting devices 23 in the display panel 100 that decays over time can be reduced, thereby improving the color rendering shift phenomenon of the display panel 100 and enhancing the display effect of the display device 1000.
  • the ratio of the sum of the light emitting areas of multiple green light emitting devices 22 to the sum of the light emitting areas of multiple red light emitting devices 21 is greater than 1 and less than or equal to 4 (for example, 1.1, 1.5, 1.8, 2.0, 2.3, 2.5, 2.8, 3, 3.5, 3.8 or 4).
  • the luminous efficiency of the red light-emitting device 21 is higher than that of the green light-emitting device 22, limiting the ratio of the sum of the light-emitting areas of the multiple green light-emitting devices 22 to the sum of the light-emitting areas of the multiple red light-emitting devices 21 can relatively reduce the light-emitting areas of the multiple red light-emitting devices 21, and thus can relatively reduce the brightness and luminous efficiency of the red light-emitting device 21, thereby reducing the difference between the ratio of the brightness decay of the red light-emitting device 21 over time and the ratio of the brightness decay of the green light-emitting device 22 over time, thereby improving the color rendering deviation phenomenon of the display panel 100 and improving the stability of the display performance and display effect of the display panel 100.
  • the ratio of the sum of the light emitting areas of multiple green light emitting devices 22 to the sum of the light emitting areas of multiple red light emitting devices 21 is greater than 1 and less than or equal to 3 (e.g., 1.2, 1.4, 1.7, 2.1, 2.4, 2.6, 2.9 or 3).
  • the light emitting areas of the multiple red light emitting devices 21 can be relatively reduced, and the difference between the ratio of the brightness decay of the red light emitting devices 21 over time and the ratio of the brightness decay of the green light emitting devices 22 over time can be further reduced, thereby effectively improving the color shift phenomenon of the display panel 100 and improving the stability of the display performance and display effect of the display panel 100.
  • the ratio of the sum of the light emitting areas of the plurality of green light emitting devices 22 to the sum of the light emitting areas of the plurality of red light emitting devices 21 satisfies the following formula 2:
  • SG represents the ratio of the sum of the light-emitting areas of the plurality of green light-emitting devices 22 to the area of the display area of the display panel 100;
  • SR represents the ratio of the sum of the light-emitting areas of the plurality of red light-emitting devices 21 to the area of the display area of the display panel 100;
  • EG represents the current efficiency of the green light-emitting device 22 when the current density is 10 mA/ cm2 , in cd/A;
  • ER represents the current efficiency of the red light-emitting device 21 when the current density is 10 mA/cm2, in cd/A;
  • RO represents the current efficiency of the green light-emitting device 22 when the current density is 10 mA/ cm2 , in cd/A;
  • ROR represents the proportion of the current efficiency of the
  • the second operating condition is that the operating brightness of the display panel 100 is greater than or equal to 100 nit and less than or equal to 800 nit (for example, 100 nit, 200 nit, 400 nit, 600 nit or 800 nit), and the abscissa value of the white light emitted by the display panel 100 in the color coordinate is greater than or equal to 0.30 and less than or equal to 0.33 (for example, 0.30, 0.31, 0.32 or 0.33), and the ordinate value is greater than or equal to 0.31 and less than or equal to 0.34 (for example, 0.31, 0.32, 0.33 or 0.34).
  • ROR ( ER - ER ')/ ER , wherein ER ' is the current efficiency of the red light emitting device 21 when the current density is 20 mA/ cm2 , and the unit is cd/A.
  • the ratio of the luminous efficiency attenuation of the red light emitting device 21, the ratio of the luminous efficiency attenuation of the green light emitting device 22, and the ratio between the working current of the green light emitting device 22 and the working current of the red light emitting device 21 can be accurately defined, so that the ratio of the brightness attenuation of the red light emitting device 21 and the ratio of the brightness attenuation of the green light emitting device 22 in the display panel 100 over time can be close.
  • the ratio of the brightness attenuation of the red light emitting device 21 and the ratio of the brightness attenuation of the green light emitting device 22 in the same display panel 100 can be adapted to the ratio of the brightness attenuation of the blue light emitting device 23 over time, thereby ensuring that the color gamut of the display panel 100 covers the NTSC color gamut standard 100%, improving the color shift phenomenon of the display panel 100, and improving the stability of the display performance and display effect of the display panel 100.
  • the ratio of the sum of the light emitting areas of multiple red light emitting devices 21 to the sum of the light emitting areas of multiple blue light emitting devices 23 is greater than or equal to 0.4 and less than or equal to 0.8 (for example, 0.4, 0.5, 0.6, 0.7 or 0.8).
  • the luminous efficiency of the red light-emitting device 21 is higher than that of the blue light-emitting device 23 limiting the ratio of the sum of the light-emitting areas of the multiple red light-emitting devices 21 to the sum of the light-emitting areas of the multiple blue light-emitting devices 23 can relatively reduce the light-emitting areas of the multiple red light-emitting devices 21, and thus can relatively reduce the brightness and luminous efficiency of the red light-emitting devices 21, thereby narrowing the difference between the luminous efficiency of the red light-emitting device 21 and the luminous efficiency of the blue light-emitting device 23, so that the ratio of the brightness decay of the red light-emitting device 21 and the ratio of the brightness decay of the blue light-emitting device 23 in the display panel 100 over time are close, thereby improving the color rendering shift phenomenon of the display panel 100 and improving the stability of the display performance and display effect of the display panel 100.
  • the ratio of the sum of the light emitting areas of the plurality of green light emitting devices 22 to the sum of the light emitting areas of the plurality of blue light emitting devices 23 is greater than or equal to 0.8 and less than or equal to 1.5 (e.g., 0.8, 0.9, 1.0, 1.2, 1.4 or 1.5).
  • the ratio of the brightness decay of the green light emitting devices 22 in the display panel 100 over time can be adapted to the ratio of the brightness decay of the blue light emitting devices 23 over time.
  • the color rendering deviation phenomenon of the display panel 100 is improved, and the stability of the display performance and the display effect of the display panel 100 are improved.
  • the ratio of the sum of the light emitting areas of the plurality of green light emitting devices 22 to the area of the display area of the display panel 100 is greater than the ratio of the sum of the light emitting areas of the plurality of red light emitting devices 21 to the area of the display area of the display panel 100.
  • the ratio of the sum of the light emitting areas of the plurality of blue light emitting devices 23 to the area of the display area of the display panel 100 is also greater than the ratio of the sum of the light emitting areas of the plurality of red light emitting devices 21 to the area of the display area of the display panel 100.
  • the luminous efficiency of the red light-emitting device 21 is greater than that of the green light-emitting device 22 and greater than that of the blue light-emitting device 23, by limiting the proportion of the sum of the light-emitting areas of multiple green light-emitting devices 22 in the display area of the display panel 100 to be greater than the sum of the light-emitting areas of multiple red light-emitting devices 21, and limiting the proportion of the sum of the light-emitting areas of multiple blue light-emitting devices 23 to be greater than the sum of the light-emitting areas of multiple red light-emitting devices 21, the proportion of the brightness decay of the red light-emitting device 21, the proportion of the brightness decay of the green light-emitting device 22, and the proportion of the brightness decay of the blue light-emitting device 23 in the same display panel 100 over time can be made close, thereby ensuring that the color gamut of the display panel 100 covers the NTSC color gamut standard 100%, improving the color rendering deviation phenomenon of the display panel 100, and improving the stability
  • the ratio of the sum of the light emitting areas of the plurality of blue light emitting devices 23 to the sum of the light emitting areas of the plurality of green light emitting devices 22 and the light emitting areas of the plurality of red light emitting devices 21 is greater than or equal to 0.4 and less than or equal to 0.8 (e.g., 0.4, 0.5, 0.6, 0.7 or 0.8). It can be understood that the ratio of SB in the above formula 1 to the sum of SG and SR in the above formula 2 is greater than or equal to 0.4 and less than or equal to 0.8.
  • the luminous efficiency of the blue light emitting device 23 can be relatively improved, so that the ratio of the brightness decay of the red light emitting device 21 and the ratio of the brightness decay of the green light emitting device 22 in the same display panel 100 are adapted to the ratio of the brightness decay of the blue light emitting device 23 over time, thereby ensuring that the color gamut of the display panel 100 covers 100% of the NTSC color gamut standard, and improving the color rendering deviation phenomenon of the display panel 100, thereby improving the stability of the display performance and display effect of the display panel 100.
  • the encapsulation layer 30 may be located on a side of the second electrode CE away from the base substrate 10 .
  • the encapsulation layer 30 may be a single-layer structure or a multi-layer composite structure.
  • the encapsulation layer 30 is configured to prevent water and oxygen from entering the light-emitting unit 20 .
  • the encapsulation layer 30 may include a first inorganic layer 31 , an organic layer 32 , and a second inorganic layer 33 sequentially stacked in a direction in which the light emitting unit 20 is away from the base substrate 10 .
  • the size of the first inorganic layer 31 and the second inorganic layer 33 along the direction perpendicular to the base substrate 10 is greater than or equal to 0.5 ⁇ m and less than or equal to 2.0 ⁇ m (e.g., 0.5 ⁇ m, 0.8 ⁇ m, 1.0 ⁇ m, 1.2 ⁇ m, 1.5 ⁇ m, 1.7 ⁇ m or 2.0 ⁇ m).
  • the size of the first inorganic layer 31 along the direction perpendicular to the base substrate 10 may be 1.0 ⁇ m
  • the size of the second inorganic layer 33 along the direction perpendicular to the base substrate 10 may be 0.7 ⁇ m.
  • the materials of the first inorganic layer 31 and the second inorganic layer 33 may be selected from at least one of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, or lithium fluoride.
  • the material of the organic layer 32 may be at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, or perylene resin. Those skilled in the art may change the number of layers, materials, and structures of the thin film encapsulation layer 30 as needed, and the present disclosure is not limited thereto.
  • FIG. 11 and 12 are structural diagrams of display panels according to some embodiments.
  • the display panel 100 may further include a light blocker 40.
  • the light blocker 40 may be located on a side of the encapsulation layer 30 away from the base substrate 10, and the light blocker 40 may be located in a non-light emitting region of the display panel 100.
  • the light blocker 40 may be located on a side of the second inorganic layer away from the base substrate 10.
  • the material of the light blocker 40 may be a black matrix.
  • the portion of the display panel 100 located in the light-emitting area and on the same layer as the light-blocking body 40 can be made into a flat surface by filling optically clear adhesive (OCA) to facilitate the manufacture of components in subsequent processes.
  • OCA optically clear adhesive
  • the light blocking body 40 is configured to prevent light of different colors emitted from other light-emitting areas from entering the light-emitting area, so as to ensure the color purity of the light emitted from each light-emitting area and improve the contrast of the color of the light emitted from each light-emitting area, thereby improving the display effect of the display panel 100.
  • the display panel 100 may further include a color filter film 50.
  • the color filter film 50 may be disposed in the same layer as the light blocker 40, and the color filter film 50 is located in the light emitting area of the display panel 100. It can be understood that the light blocker 40 and the color filter film 50 are both made on the surface of the encapsulation layer 30 away from the base substrate 10.
  • the sizes of the light blocker 40 and the color filter film 50 in the direction perpendicular to the base substrate 10 may be different.
  • the light blocker 40 and the color filter film 50 can be made into a flat surface by coating optically transparent adhesive OCA on the surface away from the base substrate 10 to facilitate the manufacture of components in subsequent processes.
  • the color filter film 50 can reduce the reflection of the light emitted by the light emitting device, filter out the noise in the display light, improve the light extraction efficiency of the display panel 100 and the saturation of the display light, and thus improve the display effect of the display device 1000.
  • the color filter film 50 may include at least one of a first filter film segment 51, a second filter film segment 52, or a third filter film segment 53.
  • the color filter film 50 may include a first filter film segment 51, a second filter film segment 52, and a third filter film segment 53.
  • the first filter film segment 51 covers the first sub-pixel region P1
  • the second filter film segment 52 covers the second sub-pixel region P2
  • the third filter film segment 53 covers the third sub-pixel region P3.
  • the first filter film segment 51 can transmit red light.
  • the wavelength of the transmitted light of the first filter film segment 51 is greater than Or equal to 650 nm and less than or equal to 720 nm (for example, 650 nm, 680 nm, 700 nm or 720 nm).
  • the second filter film segment 52 can transmit green light.
  • the wavelength of the light transmitted by the second filter film segment 52 is greater than or equal to 500 nm and less than or equal to 600 nm (eg, 500 nm, 540 nm, 580 nm or 600 nm).
  • the third filter film segment 53 can transmit blue light.
  • the wavelength of the transmitted light of the third filter film segment 53 is greater than or equal to 430 nm and less than or equal to 480 nm (eg, 430 nm, 450 nm, 460 nm or 480 nm).
  • the overlap ratio between the transmission spectrum of the color filter film 50 and the emission spectrum of the corresponding light-emitting device is greater than or equal to 80% (e.g., 80%, 82%, 85%, 90%, or 95%). The greater the overlap ratio between the transmission spectrum of the color filter film 50 and the emission spectrum of the corresponding light-emitting device, the more light emitted by the light-emitting device passes through the color filter film 50.
  • the display panel 100 may further include an optical function layer 60.
  • the optical function layer 60 may be located on a side of the encapsulation layer 30 away from the base substrate 10, and the optical function layer 60 is configured to refract the light emitted from the light emitting device into polarized light.
  • the optical function layer 60 may be a quarter wave plate.
  • the optical function layer 60 can change the propagation direction of the light emitted from the light emitting device, thereby improving the light extraction efficiency of the display panel 100 .
  • the display panel 100 may further include a light gain layer 70.
  • the light gain layer 70 may be located between the light emitting unit 20 and the optical functional layer 60, and may include at least one of a red light gain layer, a green light gain layer, and a blue light gain layer stacked in sequence in a direction perpendicular to the base substrate 10.
  • the light gain layer 70 may improve the brightness and light emission efficiency of the display panel 100, improve the color shift phenomenon of the display panel 100, and enhance the display effect of the display device 1000.
  • the red light gain layer can transmit red light with a wavelength greater than or equal to 650nm and less than or equal to 720nm (e.g., 650nm, 680nm, 700nm, or 720nm).
  • the green light gain layer can transmit green light with a wavelength greater than or equal to 500nm and less than or equal to 600nm (e.g., 500nm, 540nm, 580nm, or 600nm).
  • the blue light gain layer can transmit blue light with a wavelength greater than or equal to 430nm and less than or equal to 480nm (e.g., 430nm, 450nm, 460nm, or 480nm).
  • the dimensions of the red light gain layer, the green light gain layer, and the blue light gain layer along the direction perpendicular to the base substrate 10 are all greater than or equal to 4 ⁇ m and less than or equal to 6 ⁇ m (e.g., 4 ⁇ m, 4.5 ⁇ m, 5 ⁇ m, or 6 ⁇ m).
  • the adjacent red light gain layers, green light gain layers, and blue light gain layers can be bonded by optically transparent adhesive OCA.
  • the light gain layer 70 may be a circularly polarized light gain layer 70.
  • the reflectivity of the light gain layer 70 is greater than or equal to 45% (e.g., 45%, 50%, 60%, 65%, or 70%).
  • the transmittance of light having a wavelength greater than or equal to 400 nm and less than or equal to 800 nm (e.g., 400 nm, 500 nm, 600 nm, 700 nm, or 800 nm) through the circular polarizer is greater than or equal to 95% (e.g., 95%, 96%, 97%, or 98%).
  • the optical gain layer 70 may include green light gain layers sequentially stacked in a direction perpendicular to the substrate 10. gain layer and blue light gain layer.
  • the brightness of the green light-emitting device 22 and the blue light-emitting device 23 in the same display panel 100 can be improved, so that the brightness attenuation ratio of the green light-emitting device 22 and the brightness attenuation ratio of the blue light-emitting device 23 are close to the brightness attenuation ratio of the red light-emitting device 21, thereby improving the color rendering shift phenomenon of the display panel 100 and enhancing the display effect of the display device 1000.
  • the display panel 100 may further include an anti-reflection layer 80 .
  • the anti-reflection layer 80 is located on a side of the light emitting unit 20 away from the substrate 10 and is configured to deflect light emitted from the light emitting device toward a direction close to perpendicular to the substrate 10 .
  • the anti-reflection layer 80 may be located on the surface of the optical function layer 60 away from the encapsulation layer 30.
  • the light emitted from the light emitting device first passes through the optical function layer 60 to become polarized light, and then enters the anti-reflection layer 80, which can deflect the light emitted from the light emitting device toward a direction close to perpendicular to the base substrate 10, reduce the reflection of the light emitted from the light emitting device, and improve the contrast of the display light of the display panel 100, thereby improving the display effect of the display device 1000.
  • the anti-reflection layer 80 may be located on the surface of the optical function layer 60 away from the light gain layer 70.
  • the light emitted from the light emitting device first passes through the light gain layer 70 to increase the brightness, then passes through the optical function layer 60 to become polarized light, and then the polarized light enters the anti-reflection layer 80, which can reduce the reflection of the light emitted from the light emitting device, and can improve the contrast and brightness of the display light of the display panel 100, thereby improving the display effect of the display device 1000.
  • the display panel 100 includes a base substrate 10, a light-emitting unit 20, an encapsulation layer 30, an optical functional layer 60, and an anti-reflection layer 80.
  • the light-emitting unit 20 is located on one side of the base substrate 10
  • the encapsulation layer 30 is located on the surface of the light-emitting unit 20 away from the base substrate 10
  • the optical functional layer 60 is located on the surface of the encapsulation layer 30 away from the light-emitting unit 20
  • the anti-reflection layer 80 is located on the surface of the optical functional layer 60 away from the encapsulation layer 30.
  • Experimental device 1, experimental device 2, and experimental device 3 having a macroscopic structure substantially the same as the display panel 100 shown in FIG12 , as well as comparative device 1, comparative device 2, and comparative device 3 are prepared.
  • the specific performance parameters of experimental device 1, experimental device 2, experimental device 3, comparative device 1, comparative device 2, and comparative device 3 are shown in Table 1 below:
  • experimental device 1, experimental device 2, experimental device 3, comparative device 1, comparative device 2 and comparative device 3 are that the ratio SR of the sum of the light-emitting areas of the multiple red light-emitting devices 21 to the area of the display area of the display panel 100, the ratio SG of the sum of the light-emitting areas of the multiple green light-emitting devices 22 to the area of the display area of the display panel 100, and the ratio SB of the sum of the light-emitting areas of the multiple blue light-emitting devices 23 to the area of the display area of the display panel 100 are different.
  • Des.SR/SG@Formula 2 represents the value range of SR/SG calculated according to Formula 2
  • Des.SB@Formula 1 represents the value range of SB calculated according to Formula 1
  • LR, LG, and LB are the thousandths of the residual brightness of the red light-emitting device 21, the green light-emitting device 22, and the blue light-emitting device 23 in the same display panel 100 after the aging test, that is, the display panel 100 has a white light color coordinate value of (0.31, 0.32) and a brightness of 800 cd/m 2 , after continuously lighting for 200h under the working condition, the remaining brightness of the red light-emitting device 21 is the thousandth ratio LR of the initial brightness, the remaining brightness of the green light-emitting device 22 is the thousandth ratio LG of the initial brightness, and the remaining brightness of the blue light-emitting device 23 is the thousandth ratio LB; LR:LG:LB represents the ratio of the remaining brightness of the red light-emitting device 21 to the initial brightness, the remaining
  • experimental devices 1 to 3 and comparative devices 1 to 3 Based on the data in Table 1 and Table 2, it can be seen that in experimental devices 1 to 3 and comparative devices 1 to 3: the sum of the light-emitting areas of all red light-emitting devices 21, all green light-emitting devices 22 and all blue light-emitting devices 23 has the same proportion to the display area of the display panel 100, and the initial white light color coordinate value is the same.
  • the main difference between experimental devices 1 to 3 and comparative devices 1 to 3 is that experimental devices 1, 2 and 3 meet the value range of SB calculated by formula 1 and SG/SR calculated by formula 2.
  • Comparative device 1 satisfies the value range of SG/SR calculated by formula 2, but does not satisfy the value range of SB calculated by formula 1; Comparative device 2 satisfies the value range of SB calculated by formula 1, but does not satisfy the value range of SG/SR calculated by formula 2; Comparative device 3 neither satisfies the value range of SB calculated by formula 1 nor the value range of SG/SR calculated by formula 2.
  • the ratio of the brightness decay of the red light emitting device 21 over time, the ratio of the brightness decay of the green light emitting device 22 over time, and the ratio of the brightness decay of the blue light emitting device 23 over time in the experimental device 1, the experimental device 2, and the experimental device 3 are close, and no obvious white light color coordinate shift phenomenon occurs in the experimental device 1, the experimental device 2, and the experimental device 3.
  • the ratio of the brightness decay of the blue light emitting device 23 over time in the comparative device 1 is too fast.
  • the ratio of the brightness decay of the red light emitting device 21 over time in the comparative device 2 is too fast.
  • the ratio of the brightness decay of the green light emitting device 22 over time in the comparative device 3 is too fast.
  • the ratio of the brightness decay of the blue light emitting device 23 over time can be reduced by calculating SB by formula 1, and the ratio of the brightness decay of the red light emitting device 21 over time and the ratio of the brightness decay of the green light emitting device 22 over time can be made close by calculating SG/SR by formula 2.
  • the ratio of the brightness decay of the red light-emitting device 21, the ratio of the brightness decay of the green light-emitting device 22, and the ratio of the brightness decay of the blue light-emitting device 23 in the same display panel 100 can be close to each other, thereby improving the color deviation phenomenon of the display panel 100 and improving the stability of the display performance and the display effect of the display panel 100.
  • the display panel 100 includes a base substrate 10, a light emitting unit 20, an encapsulation layer 30, an optical gain layer 70, an optical functional layer 60, and an anti-reflection layer 80.
  • the light emitting unit 20 is located on one side of the base substrate 10
  • the encapsulation layer 30 is located on the surface of the light emitting unit 20 away from the base substrate 10
  • the optical gain layer 70 is located on the surface of the encapsulation layer 30 away from the light emitting unit 20
  • the optical functional layer 60 is located on the surface of the light gain layer 70 away from the encapsulation layer 30, and the anti-reflection layer 80 is located on the surface of the optical functional layer 60 away from the optical gain layer 70.
  • Experimental devices 4, 5, and 6 having a macroscopic structure substantially the same as the display panel 100 shown in FIG9A , as well as comparative devices 4, 5, and 6 are prepared.
  • the specific performance parameters of the experimental devices 4, 5, 6, comparative devices 4, 5, and 6 are shown in Table 3 below:
  • experimental device 4 The main differences between experimental device 4, experimental device 5, experimental device 6, comparative device 4, comparative device 5 and comparative device 6 are that the area ratio SR of the sum of the light-emitting areas of multiple red light-emitting devices 21 to the display area of the display panel 100, the area ratio SG of the sum of the light-emitting areas of multiple green light-emitting devices 22 to the display area of the display panel 100, and the area ratio SB of the sum of the light-emitting areas of multiple blue light-emitting devices 23 to the display area of the display panel 100 are different.
  • experimental devices 4 to experimental devices 6 and comparative devices 4 to comparative devices 6 are: experimental devices 4, experimental devices 5 and experimental devices 6 meet the value range of SB calculated by formula 1 and the value range of SG/SR calculated by formula 2; comparative device 4 meets the value range of SG/SR calculated by formula 2, but does not meet the value range of SB calculated by formula 1; comparative device 5 meets the value range of SB calculated by formula 1, but does not meet the value range of SG/SR calculated by formula 2; comparative device 6 meets the value range of SG/SR calculated by formula 2, but does not meet the value range of SB calculated by formula 1.
  • experimental devices 4 to 6 include a light gain layer 70 and an optical functional layer 60.
  • experimental devices 4 to 6 include a light gain layer 70 and an optical functional layer 60.
  • the proportion of the brightness decay of the red light emitting device 21, the proportion of the brightness decay of the green light emitting device 22, and the proportion of the brightness decay of the blue light emitting device 23 are closer in experimental devices 4 to 6, and the brightness and luminous efficiency of each light emitting device are higher.
  • the light gain layer 70 and the optical functional layer 60 can improve the brightness and luminous efficiency of the display panel 100, improve the color shift phenomenon of the display panel 100, and enhance the display effect of the display device 1000.
  • experimental device 7, experimental device 8, experimental device 9, comparative device 7, comparative device 8 and comparative device 9 are that the ratio SR of the sum of the light-emitting areas of the multiple red light-emitting devices 21 to the area of the display area of the display panel 100, the ratio SG of the sum of the light-emitting areas of the multiple green light-emitting devices 22 to the area of the display panel 100, and the ratio SB of the sum of the light-emitting areas of the multiple blue light-emitting devices 23 to the area of the display area of the display panel 100 are different.
  • experimental devices 7 to experimental devices 9 and comparative devices 7 to comparative devices 9 are: experimental devices 7, experimental devices 8 and experimental devices 9 meet the value range of SB calculated by formula 1 and the value range of SG/SR calculated by formula 2; comparative device 7 meets the value range of SG/SR calculated by formula 2, but does not meet the value range of SB calculated by formula 1; comparative device 8 meets the value range of SB calculated by formula 1, but does not meet the value range of SG/SR calculated by formula 2; comparative device 9 meets the value range of SB calculated by formula 1, but does not meet the value range of SG/SR calculated by formula 2.
  • the ratio of the brightness decay of the red light emitting device 21 over time in Comparative Device 8 is faster than the ratio of the brightness decay of the green light emitting device 22 over time, and the ratio of the brightness decay of the blue light emitting device 23 over time is also faster than the ratio of the brightness decay of the green light emitting device 22 over time.
  • the ratio of the brightness decay of the blue light emitting device 23 over time in Comparative Device 9 is too fast. And obvious white light color coordinate shift phenomenon occurs in both Comparative Devices 7 and 9.
  • the ratio of the brightness decay of the red light-emitting device 21 and the ratio of the brightness decay of the green light-emitting device 22 in the same display panel 100 over time are adapted to the ratio of the brightness decay of the blue light-emitting device 23 over time, which can improve the color rendering shift phenomenon of the display panel 100 and enhance the stability of the display performance and display effect of the display panel 100.

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Abstract

一种显示面板及显示装置。显示面板包括显示区和非显示区。显示面板还包括衬底基板和发光单元。发光单元位于衬底基板的一侧。发光单元包括多个发光器件。多个发光器件包括多个红色发光器件、多个绿色发光器件和多个蓝色发光器件。其中，多个蓝色发光器件的出光面积之和，占显示面板的显示区的面积比例大于或者等于4％且小于或者等于25％。

Description

显示面板及显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种显示面板和具有该显示面板的显示装置。
背景技术
有机电致发光器件(Organic Light Emitting Diode，OLED)因具有自发光、亮度高、对比度高、色域高、响应速度快、视角宽、功耗低以及柔性显示等诸多优点，是目前主流应用于智能显示终端的显示产品。
OLED显示产品中，通过红色发光器件、绿色发光器件和蓝色发光器件进行发光，实现OLED显示产品的全彩显示。目前，红色发光器件的发光效率和绿色发光器件的发光效率均高于蓝色发光器件的发光效率。
发明内容
一方面，提供一种显示面板。所述显示面板包括显示区和非显示区。所述显示面板还包括衬底基板和发光单元。所述发光单元位于所述衬底基板的一侧。所述发光单元包括多个发光器件。所述多个发光器件包括多个红色发光器件、多个绿色发光器件和多个蓝色发光器件。其中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例大于或者等于4％且小于或者等于25％。
在一些实施例中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例大于或者等于5％且小于或者等于18％。
在一些实施例中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例满足下列公式1：
所述公式1中，SB表示所述多个蓝色发光器件的出光面积之和占所述显示面板的显示区的面积比例；L表示在第一工况下，所述蓝色发光器件的工作亮度的最大值；JB表示在所述第一工况下，所述蓝色发光器件的电流密度；ROB表示所述蓝色发光器件的电流密度从5mA/cm2增加到10mA/cm2时，所述蓝色发光器件的电流效率下降的比例；f表示所述蓝色发光器件的外量子效率的最大值，定义为所述蓝色发光器件对外辐射光子数与所述蓝色发光器件中复合的空穴电子对数量之比的最大值。所述第一工况为：所述显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34，且所述蓝色发光器件的寿命大于或者等于300h的工况。
在一些实施例中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值大于1且小于或者等于4。
在一些实施例中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值大于1且小于或者等于3。
在一些实施例中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值满足下列公式2：
所述公式2中，SG表示所述多个绿色发光器件的出光面积之和占所述显示面板的显示区的面积比例；SR表示所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例；EG表示所述绿色发光器件的电流密度为10mA/cm2时的电流效率；ER表示所述红色发光器件的电流密度为10mA/cm2时的电流效率；ROG表示所述绿色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述绿色发光器件的电流效率下降的比例；ROR表示所述红色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述红色发光器件的电流效率下降的比例；klim表示在第二工况下所述绿色发光器件的工作电流与所述红色发光器件的工作电流之间的比值的最大值。所述第二工况为：所述显示面板的工作亮度大于或者等于100nit且小于或者等于800nit，且显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34的工况。
在一些实施例中，所述蓝色发光器件包括至少一个蓝色发光层。所述蓝色发光层的发光材料包括金属配合物。所述金属配合物包括铂、钯、铱、金、镍、银、铜或铈金属配体元素中的至少一种。
在一些实施例中，所述的显示面板还包括像素界定层。所述像素界定层位于所述衬底基板之上。所述像素界定层开设有多个发光开口，所述多个发光开口包括多个第一发光开口、多个第二发光开口和多个第三发光开口，所述红色发光器件覆盖所述第一发光开口，所述绿色发光器件覆盖所述第二发光开口，所述蓝色发光器件覆盖所述第三发光开口。所述多个第一发光开口的面积之和与所述多个第二发光开口的面积之和的比值，与所述多个红色发光器件的出光面积之和与所述多个绿色发光器件的出光面积之和的比值大致相同。
在一些实施例中，所述多个第一发光开口的面积之和与所述多个第三发光开口的面积之和的比值，与所述多个红色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大致相同。
在一些实施例中，所述多个第二发光开口的面积之和与所述多个第三发光开口的面积之和的比值，与所述多个绿色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大致相同。
在一些实施例中，所述多个绿色发光器件的出光面积之和占所述显示面板的显示区的 面积比例，大于所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例。所述多个蓝色发光器件的出光面积之和占所述显示面板的显示区的面积比例，也大于所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例。
在一些实施例中，所述多个红色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大于或者等于0.4且小于或者等于0.8。
在一些实施例中，所述多个绿色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大于或者等于0.8且小于或者等于1.5。
在一些实施例中，所述多个蓝色发光器件的出光面积之和，与所述多个绿色发光器件的出光面积和所述多个红色发光器件的出光面积之和的比值大于或者等于0.4且小于或者等于0.8。
在一些实施例中，所述显示区包括所述多个发光器件的发光区、以及除所述多个发光器件的发光区之外的非发光区。所述多个蓝色发光器件的出光面积之和，与所述非发光区的面积的比例大于或者等于4％且小于或者等于75％。
在一些实施例中，所述显示面板还包括像素界定层。所述像素界定层位于所述衬底基板之上，开设有多个发光开口。其中，所述多个发光开口的面积之和，与所述非发光区的面积的比值大于或者等于0.2且小于或者等于2.0。
在一些实施例中，所述多个发光开口的面积之和，与所述显示面板的显示区的面积的比值大于或者等于0.15且小于或者等于0.65。
在一些实施例中，所述的显示面板还包括抗反射层。所述抗反射层位于所述发光单元远离所述衬底基板的一侧，被配置为使从所述发光器件发出的光线向靠近垂直于所述衬底基板的方向偏转。
在一些实施例中，所述的显示面板还包括光学功能层。所述光学功能层位于所述发光单元和所述抗反射层之间，被配置为使从所述发光器件发出的光线折射后成为偏振光线。
在一些实施例中，所述的显示面板还包括光增益层。所述光增益层位于所述发光单元和所述光学功能层之间，所述光增益层包括沿垂直于所述衬底基板的方向依次叠置的红光增益层、绿光增益层和蓝光增益层中的至少一层。
另一方面，提供一种显示面板。所述显示面板包括显示区和非显示区。所述显示面板还包括衬底基板、像素界定层和发光单元。所述像素界定层位于所述衬底基板之上，所述像素界定层开设有多个第一发光开口、多个第二发光开口和多个第三发光开口。所述发光单元包括多个发光器件，所述多个发光器件包括多个第一颜色发光器件、多个第二颜色发光器件和多个第三颜色发光器件。所述第一颜色发光器件覆盖所述第一发光开口，所述第二颜色发光器件覆盖所述第二发光开口，所述第三颜色发光器件覆盖所述第三发光开口。
其中，所述多个第三发光开口的面积之和，占所述显示面板的显示区的面积比例大于 或者等于4％且小于或者等于25％。
在一些实施例中，所述多个第三发光开口的面积之和，占所述显示面板的显示区的面积比例满足下列公式1：
所述公式1中，SB表示所述多个第三发光开口的面积之和占所述显示面板的显示区的面积比例；L表示在第一工况下，所述第三颜色发光器件的工作亮度的最大值；JB表示在所述第一工况下，所述第三颜色发光器件的电流密度；ROB表示所述第三颜色发光器件的电流密度从5mA/cm2增加到10mA/cm2时，所述第三颜色发光器件的电流效率下降的比例；f表示所述第三颜色发光器件的外量子效率的最大值，定义为所述第三颜色发光器件对外辐射光子数与所述第三颜色发光器件中复合的空穴电子对数量之比的最大值。所述第一工况为：所述显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34，且所述第三颜色发光器件的寿命大于或者等于300h的工况。
在一些实施例中，所述多个第二发光开口的面积之和，与所述多个第一发光开口的面积之和的比值满足下列公式2：
所述公式2中，SG表示所述多个第二发光开口的面积之和占所述显示面板的显示区的面积比例；SR表示所述多个第一发光开口的面积之和占所述显示面板的显示区的面积比例；EG表示所述第二颜色发光器件的电流密度为10mA/cm2时的电流效率；ER表示所述第一颜色发光器件的电流密度为10mA/cm2时的电流效率；ROG表示所述第二颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述第二颜色发光器件的电流效率下降的比例；ROR表示所述第一颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述第一颜色发光器件的电流效率下降的比例；klim表示在第二工况下所述第二颜色发光器件的工作电流与所述第一颜色发光器件的工作电流之间的比值的最大值。所述第二工况为：所述显示面板的工作亮度大于或者等于100nit且小于或者等于800nit，且显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34的工况。
又一方面，提供一种显示装置。所述显示装置包括电路板和如上述任一实施例所述的显示面板。所述显示面板位于所述电路板的一侧，且所述显示面板与所述电路板耦接。
附图说明
为了更清楚地说明本公开中的技术方案，下面将对本公开一些实施例中所需要使用的 附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本公开实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
图1为根据一些实施例的显示装置的结构图；
图2为根据一些实施例的显示面板的立体图；
图3为根据图2所示实施例的显示面板沿线A-A'的截面图；
图4～图8分别为根据一些实施例的显示面板中子像素的排列结构图；
图9A和图9B分别为根据一些实施例的显示面板沿图2中线A-A'的截面图；
图10为根据一些实施例的发光器件的结构图；
图11和图12分别为根据一些实施例的显示面板的结构图。
具体实施方式
下面将结合附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“耦接”和“连接”及其衍伸的表达。术语“连接”应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或成一体；可以是直接相连，也可以通过中间媒介间接相连。术语“耦接”例如表明两个或两个以上部件有直接物理接触或电接触。术语“耦接”或“通信耦合(communicatively coupled)”也可能指两个或两个以上部件彼此间并无直接接触，但仍彼此协作或相互作用。这里所公开的实 施例并不必然限制于本文内容。
“A、B和C中的至少一个”与“A、B或C中的至少一个”具有相同含义，均包括以下A、B和C的组合：仅A，仅B，仅C，A和B的组合，A和C的组合，B和C的组合，及A、B和C的组合。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
本文中“适用于”或“被配置为”的使用意味着开放和包容性的语言，其不排除适用于或被配置为执行额外任务或步骤的设备。
另外，“基于”的使用意味着开放和包容性，因为“基于”一个或多个所述条件或值的过程、步骤、计算或其他动作在实践中可以基于额外条件或超出所述的值。
如本文所使用的那样，本文中各处的“多个”并不指示数量相同，仅表示数量至少包括两个。
如本文所使用的那样，“约”、“大致”或“近似”包括所阐述的值以及处于特定值的可接受偏差范围内的平均值，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。
如本文所使用的那样，“平行”、“垂直”、“相等”包括所阐述的情况以及与所阐述的情况相近似的情况，该相近似的情况的范围处于可接受偏差范围内，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。例如，“平行”包括绝对平行和近似平行，其中近似平行的可接受偏差范围例如可以是5°以内偏差；“垂直”包括绝对垂直和近似垂直，其中近似垂直的可接受偏差范围例如也可以是5°以内偏差。“相等”包括绝对相等和近似相等，其中近似相等的可接受偏差范围内例如可以是相等的两者之间的差值小于或等于其中任一者的5％。
应当理解的是，当层或元件被称为在另一层或基板上时，可以是该层或元件直接在另一层或基板上，或者也可以是该层或元件与另一层或基板之间存在中间层。
本文参照作为理想化示例性附图的剖视图和/或平面图描述了示例性实施方式。在附图中，为了清楚，放大了层的厚度和区域的面积。因此，可设想到由于例如制造技术和/或公差引起的相对于附图的形状的变动。因此，示例性实施方式不应解释为局限于本文示出的区域的形状，而是包括因例如制造而引起的形状偏差。例如，示为矩形的蚀刻区域通常将具有弯曲的特征。因此，附图中所示的区域本质上是示意性的，且它们的形状并非旨在示出设备的区域的实际形状，并且并非旨在限制示例性实施方式的范围。
目前，OLED显示面板中，蓝色发光器件的发光材料包括蓝色荧光发光材料和蓝色磷光发光材料。由于蓝色磷光发光材料的稳定性差且寿命较短，而蓝色荧光材料具备良好的稳定性的原因，因此蓝色荧光发光材料在蓝色发光器件中的应用更为广泛。
然而，本公开的发明人经研究发现：在蓝色发光器件中，蓝色荧光发光材料的激子利用率较低，导致显示面板中蓝色发光器件的发光效率较低。蓝色磷光发光材料相较于蓝色荧光发光材料，大幅提升了激子利用率，可以提高蓝色发光器件的发光效率。然而采用蓝色磷光发光材料制作的蓝色发光器件，在蓝色发光器件的发光效率提高的基础上会加速蓝色磷光发光材料的电离，导致蓝色发光器件的发光效率的衰减速度加快、寿命缩减。随着OLED显示面板的使用时间变长，红色发光器件、绿色发光器件和蓝色发光器件之间的显示性能差异会逐渐增大，从而导致显示装置随使用时间延长会出现显色偏移现象，且显示装置的显色偏移现象会逐渐加重，降低显示装置的显示效果。
基于此，本公开的实施例提供一种显示面板及显示装置，以克服上述问题。以下分别进行说明。
图1为根据一些实施例的显示装置的结构图。
参见图1，本公开的一些实施例提供了一种显示装置1000。显示装置1000可以用于显示图像或者画面。例如，显示装置1000可以为平板计算机、智能电话、头戴式显示器、汽车导航单元、照相机、车载中心信息显示器(CID)、手表型显示装置或其他穿戴设备、个人数字助理(PDA)、便携式多媒体播放器(PMP)或者游戏机的中小型显示装置，以及诸如电视、外部广告牌、监控器、包含显示屏幕的家用电器、个人计算机或者膝上型计算机的中大型电子装置。如上的电子装置可以代表应用显示装置的单纯示例，因此本领域普通技术人员可以认识到，在不脱离本公开的精神和范围的情况下，显示装置1000也可以是其他电子装置。
如图1所示，显示装置1000可以包括显示面板100和电路板200，显示面板100与电路板200耦接。电路板200可以位于显示面板100的背光侧(即与显示面板100的显示侧相反的一侧)。例如，电路板200可以是柔性线路板(Flexible Printed Circuit board，FPC)或者印刷电路板。电路板200可以提供发光数据信号，显示面板100基于电路板200提供的发光数据信号进行发光。
在一些示例中，电路板200可以包括处理器、存储器和时序控制电路(Timer Control Register，简称TCON)。处理器可以提供图像数据信号，时序控制电路基于处理器提供的图像数据信号向显示面板100输出时序控制信号。处理器可以是中央处理单元(Central Processing Unit，简称CPU)或者具有数据处理能力和/或指令执行能力的其它形式的处理装置，例如可以包括微处理器或者可编程逻辑控制器(Programmable Logic Controller，简称PLC)等。存储器可以包括可执行代码，处理器运行该可执行代码以执行电路检测任务。
图2为根据一些实施例的显示面板的立体图。图3为根据图2所示实施例的显示面板沿线A-A'的截面图。
如图2和图3所示，本公开的一些实施例提供了一种显示面板100。显示面板100包 括用于显示图像的显示区AA(Active Area)和不显示图像的非显示区SA。显示区AA是能够实现显示功能的有效显示区。非显示区SA围绕在显示区AA的至少一侧(例如，一侧；又如，四周，即包括上下两侧和左右两侧)。在一些示例中，非显示区SA可以封闭包围显示区AA，可以在至少一个方向上位于显示区AA的外侧。上述显示面板100在平面图中可以具有矩形形状，也可以具有圆形、椭圆、菱形、梯形、正方形或其他根据显示需要的形状。
示例性地，显示面板100可以包括位于非显示区SA内的栅极驱动子电路和数据驱动子电路。基于处理器提供的图像数据信号，时序控制电路可以分别向栅极驱动子电路和数据驱动子电路提供时序控制信号，以使栅极驱动子电路输出扫描信号、数据驱动子电路输出数据信号。
在一些实施例中，如图2和图3所示，显示面板100可以包括衬底基板10、发光单元20和封装层30。发光单元20位于衬底基板10的一侧，封装层30位于发光单元20远离衬底基板10的一侧。
以下分别是对显示面板100中衬底基板10、发光单元20和封装层30的详细说明。
如图3所示，衬底基板10包括多个重复排列的像素单元区PU。每个像素单元区PU可以包括显示不同颜色的第一子像素区P1、第二子像素区P2和第三子像素区P3。示例性地，第一子像素区P1可以被配置为显示红色光，第二子像素区P2可以被配置为显示绿色光，第三子像素区P3可以被配置为显示蓝色光。
另外，像素单元区PU还可以包括非发光区P4。非发光区P4可以位于第一子像素区P1与第二子像素区P2之间、第二子像素区P2和第三子像素区P3之间、以及第三子像素区P3和第一子像素区P1之间。
图4～图8分别为根据一些实施例的显示面板中子像素的排列结构图。
在一些示例中，如图4～图6所示，一个像素单元区PU包括一个第一子像素区P1、一个第二子像素区P2和一个第三子像素区P3。一个第一子像素区P1、一个第二子像素区P2和一个第三子像素区P3可以沿垂直于衬底基板10的方向相互间隔且重复性地排布于显示区AA内。
在一些示例中，如图7和图8所示，一个像素单元区PU中可以包括显示相同颜色的两个子像素区，显示相同颜色的两个子像素区可以相邻设置。例如，一个像素单元区PU内包括一个红色子像素区R、两个绿色子像素区G和一个蓝色子像素区B，其中，一个像素单元区PU内的两个绿色子像素区G可以相邻设置。
在一些示例中，一个像素单元区PU包括一个第一子像素区P1、两个第二子像素区P2和一个第三子像素区P3。一个第一子像素区P1、两个第二子像素区P2和一个第三子像素区P3可以相互间隔且重复性地排布于显示区AA内。在此情况下，非发光区P4还可以位 于两个第二子像素区P2之间。
其中，衬底基板10可以是单层结构或者叠层复合结构。衬底基板10可以是柔性衬底基板，也可以是刚性衬底基板。
在一些示例中，柔性衬底基板可以是叠层复合结构。例如，柔性衬底基板可以包括依次叠置的柔性基体层、阻挡层和缓冲层。又例如，柔性衬底基板可以包括依次叠置的第一柔性基体层、第一阻挡层、第二柔性基体层、第二阻挡层和缓冲层。其中，阻挡层、第一阻挡层和第二阻挡层在垂直于显示面板100的方向上的尺寸范围大于或者等于5000埃且小于或者等于6000埃(例如5000埃、5200埃、5500埃、5800埃或者6000埃)。缓冲层在垂直于显示面板100的方向上的尺寸范围大于或者等于3500埃且小于或者等于4500埃(例如3500埃、3800埃、4000埃、4300埃或者4500埃)。
示例性地，柔性基体层、第一柔性基体层和第二柔性基体层的材料可以包括聚酰亚胺、聚对苯二甲酸乙二醇酯或者聚碳酸酯中的一种或多种。
在另一些示例中，柔性衬底基板也可以是单层结构。例如，柔性衬底基板可以仅包括柔性基体层。
如图3所示，显示面板100可以包括位于衬底基板10上的多个像素电路。在一个像素单元区PU中，可以包括第一像素电路S1、第二像素电路S2和第三像素电路S3。例如，第一像素电路S1位于第一子像素区P1内，第二像素电路S2位于第二子像素区P2内，第三像素电路S3位于第三子像素区P3内。又例如，第一像素电路S1、第二像素电路S2和第三像素电路S3中至少一者的薄膜晶体管可以位于非发光区P4内。
像素电路的结构包括多种，可以根据实际需要选择设置。示例性地，像素电路可以包括：至少两个晶体管(用T表示)和至少一个电容器(用C表示)。例如，像素电路可以具有“2T1C”、“6T1C”、“7T1C”、“6T2C”或“7T2C”等结构。
需要说明的是，本公开的实施例中采用的晶体管均可以为薄膜晶体管或者场效应晶体管或者其他特性相同的开关器件。第一像素电路S1、第二像素电路S2和第三像素电路S3中至少一者的晶体管可以是包括多晶硅的薄膜晶体管或包括氧化物半导体的薄膜晶体管。例如，当薄膜晶体管为包括氧化物半导体的薄膜晶体管时，可以具有顶栅的薄膜晶体管结构。薄膜晶体管可以和信号线连接，信号线包括但不限于栅极线、数据线和电源线。其中，栅极驱动子电路可以通过栅极线与像素电路连接以提供各种扫描信号，数据驱动子电路可以通过数据线与像素电路连接以提供数据信号，从而使像素电路驱动发光器件进行发光。
在一些示例中，像素电路还可以包括补偿子电路。补偿子电路可以包括内部补偿子电路或者外部补偿子电路。补偿子电路可以包括晶体管和电容等。
在一些示例中，像素电路还可以包括复位电路、发光控制子电路或检测电路等。
像素电路的具体材质可以包括导电材料和绝缘材料。示例性地，导电材料可以包括金 (Au)、银(Ag)、铜(Cu)、铝(Al)、钼(Mo)、镁(Mg)、钨(W)以及以上金属组合而成的合金材料，或者导电金属氧化物材料。例如，导电金属氧化物材料可以是氧化铟锡(ITO)、氧化铟锌(IZO)、氧化锌(ZnO)或者氧化锌铝(AZO)。示例性地，绝缘材料可以包括无机绝缘材料或者有机绝缘材料。例如，无机绝缘材料可以包括氧化硅、氮化硅、氮氧化硅、氧化铝或者氮化钛。例如，有机绝缘材料可以是聚酰亚胺、丙烯酸酯、环氧树脂或者聚甲基丙烯酸甲酯。
如图3所示，显示面板100可以包括绝缘层INL。绝缘层INL可以位于第一像素电路S1、第二像素电路S2和第三像素电路S3上。绝缘层INL可以具有平坦化的表面。绝缘层INL可以由有机层形成。例如，绝缘层INL可以包括丙烯酸树脂、环氧树脂、酰亚胺树脂或酯树脂等。绝缘层INL可以具有通孔，暴露第一像素电路S1、第二像素电路S2和第三像素电路S3的电极，以便实现电连接。
如图3所示，显示面板100可以包括位于衬底基板10上的像素界定层PDL。像素界定层PDL可以在绝缘层INL上形成并限定出多个发光开口。多个发光开口可以包括多个第一发光开口K1、多个第二发光开口K2和多个第三发光开口K3。其中，多个第一发光开口K1可以位于第一子像素区P1内，第一子像素区P1可以是红色发光区；多个第二发光开口K2可以位于第二子像素区P2内，第二子像素区P2可以是绿色发光区；多个第三发光开口K3可以位于第三子像素区P3，第三子像素区P3可以是蓝色发光区。
图9A和图9B分别为根据一些实施例的显示面板沿图2中线A-A'的截面图。
如图9A和图9B所示，发光单元20可以位于绝缘层INL远离衬底基板10的一侧，发光单元20可以包括多个发光器件。多个发光器件可以包括多个第一颜色发光器件、多个第二颜色发光器件和多个第三颜色发光器件。
示例性地，第一颜色发光器件可以是红色发光器件21，第二颜色发光器件可以是绿色发光器件22，第三颜色发光器件可以是蓝色发光器件23。
发光器件可以包括沿垂直于衬底基板10的方向依次叠置的第一电极AE、至少一个发光层EML和第二电极CE。
在一些示例中，显示面板100可以为顶发射显示面板100。第一电极AE为反射电极，可以反射光线，例如第一电极AE为高功函数的材料制成的阳极。第二电极CE为透射或者半透射电极，可以透出光线，例如第二电极CE为低功函数的材料制成的阴极。这样，在阳极和阴极之间形成了微腔结构。
如图9A所示，第一电极AE可以包括位于第一子像素区P1的第一电极AE1、位于第二子像素区P2的第一电极AE2和位于第三子像素区P3的第一电极AE3。
第一电极AE可以包括透明导电氧化物/金属/透明导电氧化物这样的叠层复合结构。其中，透明导电氧化物材料例如为ITO或IZO。金属材料例如为Ag、Mg、Cu、Al、Pt、Pd、 Au、Ni、Nd、Ir、Cr、Li、Ca、LiF/Ca、LiF/Al、Mo、Ti、In、Sn、Zn或者Yb中的至少一种，或其其氧化物。例如阳极结构为：ITO/Ag/ITO叠层结构。
第二电极CE可以包括Ag、Mg、Cu、Al、Pt、Pd、Au、Ni、Nd、Ir、Cr、Li、Ca、LiF/Ca、LiF/Al、Mo、Ti或其化合物或混合物，例如Ag和Mg的混合物。
其中，发光器件可以包括一个或者多个发光层EML。例如，如图9B所示，发光器件可以是包括两个发光层EML的叠层发光器件。又例如，发光器件可以是包括三个发光层EML的叠层发光器件。此处只是对发光器件的示例性说明，不作为对本公开方案的限定。
图10为根据一些实施例的发光器件的结构图。
在一些实施例中，如图10所示，发光器件可以包括第一传输层TL1、发光层EML和第二传输层TL2。第一传输层TL1可以位于发光层EML和第一电极AE之间，第一传输层TL1被配置为从第一电极AE传输空穴至发光层EML。第二传输层TL2可以位于发光层EML与第二电极CE之间，第二传输层TL2被配置为从第二电极CE传输电子至发光层EML。这样，空穴和电子可以在发光层EML中复合，使得发光层EML发光。
其中，第一传输层TL1和第二传输层TL2既可以是整层结构，第一传输层TL1和第二传输层TL2也可以是覆盖发光开口的图案化结构。示例性地，可以利用高精度金属掩膜版(Fine Metal Mask，FMM)形成图案化结构的第一传输层TL1、图案化结构的发光层EML、图案化结构的第二传输层TL2和图案化结构的第一电极AE，或者通过光刻-隔离柱技术形成图案化结构的第一传输层TL1、图案化结构的发光层EML、图案化结构的第二传输层TL2和图案化结构的第一电极AE。此处只是示例性说明，不作为对本公开方案的限定。
示例性地，如图10所示，第一传输层TL1可以包括空穴注入层HIL和空穴传输层HTL。空穴注入层HIL位于第一电极AE与空穴传输层HTL之间，空穴注入层HIL被配置为将第一电极AE的空穴注入到空穴传输层HTL。空穴传输层HTL位于空穴注入层HIL和发光层EML之间，空穴传输层HTL被配置为将空穴注入层HIL注入的空穴传输至发光层EML，使得空穴在发光层EML内与电子复合，实现发光层EML的发光。
空穴注入层HIL的材料可以包括P型掺杂剂和空穴传输材料。P型掺杂剂可以包括2,3,6,7,10,11-六氰基-1,4,5,8,9,12-六氮杂苯并菲、2,3,5,6-四氟-7,7’,8,8’-四氰基对苯醌(F4TCNQ)、1,2,3-三[(氰基)(4-氰基-2,3,5,6-四氟苯基)亚甲基]环丙烷中的任意一种或多种。不同的发光器件中，空穴注入层HIL的材料可以相同，空穴注入层HIL的材料也可以不同。
空穴传输层HTL的材料和空穴传输材料均可以包括芳胺类空穴传输材料、二甲基芴类空穴传输材料、咔唑类空穴传输材料中的任意一种或多种。不同的发光器件中，空穴传输层HTL的材料可以相同，空穴传输层HTL的材料也可以不同。
例如，空穴传输材料可以包括4,4’-双[N-(1-萘基)-N-苯基氨基]联苯(NPB)、N,N’-双 (3-甲基苯基)-N,N’-二苯基-[1,1’-联苯]-4,4’-二胺(TPD)、4-苯基-4’-(9-苯基芴-9-基)三苯基胺(BAFLP)、4,4’-双[N-(9,9-二甲基芴-2-基)-N-苯基氨基]联苯(DFLDPBi)、4,4’-二(9-咔唑基)联苯(CBP)和9-苯基-3-[4-(10-苯基-9-蒽基)苯基]-9H-咔唑(PCzPA)中的任意一种或多种。
在一些示例中，如图10所示，第一传输层TL1还可以包括第一激子阻挡层BL1。第一激子阻挡层BL1可以位于空穴传输层HTL和发光层EML之间，第一激子阻挡层BL1被配置为阻挡发光层EML中的电子向靠近第一电极AE的方向运动。因此，第一激子阻挡层BL1也可以称为电子阻挡层EBL。
电子阻挡层EBL的材料可以包括芳胺类电子阻挡材料、二甲基芴类电子阻挡材料或者咔唑类电子阻挡材料中的任意一种或多种。例如，电子阻挡层EBL的材料可以包括4,4’-双[N-(1-萘基)-N-苯基氨基]联苯(NPB)、N,N’-双(3-甲基苯基)-N,N’-二苯基-[1,1’-联苯]-4,4’-二胺(TPD)、4-苯基-4’-(9-苯基芴-9-基)三苯基胺(BAFLP)、4,4’-双[N-(9,9-二甲基芴-2-基)-N-苯基氨基]联苯(DFLDPBi)、4,4’-二(9-咔唑基)联苯(CBP)或者9-苯基-3-[4-(10-苯基-9-蒽基)苯基]-9H-咔唑(PCzPA)中的任意一种或多种。不同的发光器件中，电子阻挡层EBL的材料可以相同，电子阻挡层EBL的材料也可以不同。
在一些示例中，如图10所示，第二传输层TL2可以包括电子注入层EIL和电子传输层ETL。电子注入层EIL位于电子传输层ETL与第二电极CE之间，电子注入层EIL被配置为将第二电极CE提供的电子注入到电子传输层ETL。电子传输层ETL位于电子注入层EIL与发光层EML之间，电子传输层ETL被配置为将电子注入层EIL注入的电子传输至发光层EML，使得电子在发光层EML内与空穴复合，实现发光层EML的发光。
电子注入层EIL的材料可以包括碱金属、碱土金属的氧化物以及卤化物或者其他电子注入能力较强的材料。例如，电子注入层EIL的材料可以包括Alq3、LiO2、CaO、CsO或者CsF2。
电子传输层ETL的材料可以包括电子迁移率较高的三嗪类材料、或其他电子迁移率高的材料。
在一些示例中，如图10所示，第二传输层TL2还可以包括第二激子阻挡层BL2。第二激子阻挡层BL2可以位于电子传输层ETL和发光层EML之间，第二激子阻挡层BL2被配置为阻挡发光层EML中的空穴向靠近第二电极CE的方向运动。因此，第二激子阻挡层BL2也可以称为空穴阻挡层HBL。
空穴阻挡层HBL的材料可以包括芳族杂环类空穴阻挡材料。例如，芳族杂环类空穴阻挡材料可以包括苯并咪唑及其衍生物类空穴阻挡材料、咪唑并吡啶及其衍生物类空穴阻挡材料、苯并咪唑并菲啶衍生物类空穴阻挡材料、嘧啶及其衍生物类空穴阻挡材料、三嗪衍生物类空穴阻挡材料、吡啶及其衍生物类空穴阻挡材料、吡嗪及其衍生物类空穴阻挡材料、 喹喔啉及其衍生物类空穴阻挡材料、二唑及其衍生物类空穴阻挡材料、喹啉及其衍生物类空穴阻挡材料、异喹啉衍生物类空穴阻挡材料、菲咯啉衍生物类空穴阻挡材料、二氮磷杂环戊二烯类空穴阻挡材料、氧化膦类空穴阻挡材料、芳族酮类空穴阻挡材料类、内酰胺或者硼烷类空穴阻挡材料中的任意一种或多种。例如，空穴阻挡层HBL的材料可以包括2-(4-联苯基)-5-(4-叔丁基苯基)-1,3,4-恶二唑(PBD)、1,3-双[5-(对叔丁基苯基)-1,3,4-恶二唑-2-基]苯(OXD-7)、3-(4-叔丁基苯基)-4-苯基-5-(4-联苯基)-1,2,4-三唑(TAZ)、3-(4-叔丁基苯基)-4-(4-乙基苯基)-5-(4-联苯基)-1,2,4-三唑(p-EtTAZ)、红菲咯啉(BPhen)、(BCP)或者4,4’-双(5-甲基苯并恶唑-2-基)芪(BzOs)中的任意一种或多种。
发光层EML的材料可以包括一种发光材料，也可以包括两种或者两种以上的发光材料。例如，发光层EML的材料可以包括主体材料和客体材料，客体材料可以掺杂到主体材料中进行发光。发光层EML的材料还可以包括具有室温下热激活延迟荧光特性的发光材料、具有室温下荧光特性的发光材料或者具有室温下磷光特性的发光材料。
在一些示例中，如图9A所示，红色发光器件21可以包括至少一个红色发光层EML1。可以理解地，红色发光层EML1的数量可以是一个或者多个。多个红色发光层EML1可以沿垂直于衬底基板10的方向依次叠置。红色发光层EML1的发光材料可以包括DCM类红色发光材料和金属配合物类红色发光材料中的任意一种或多种。
例如，红色发光层EML1的发光材料可以包括4-(二氰基亚甲基)-2-甲基-6-(4-二甲基氨基苯乙烯基)-4H-吡喃(DCM)、4-(二氰基甲撑)-2-叔丁基-6-(1,1,7,7-四甲基久洛尼啶-9-烯基)-4H-吡喃(DCJTB)、二(1-苯基异喹啉)·乙酰丙酮铱(III)(Ir(piq)2(acac))、八乙基卟啉合铂(Ⅱ)(PtOEP)或者二(2-(2’-苯并噻吩基)吡啶-N,C3’)·乙酰丙酮合铱(Ⅲ)(Ir(btp)2(acac))中的任意一种或多种。
在一些示例中，如图9A和图9B所示，绿色发光器件22可以包括至少一个绿色发光层EML2。可以理解地，绿色发光层EML2的数量可以是一个或者多个。多个绿色发光层EML2可以沿垂直于衬底基板10的方向依次叠置。绿色发光层EML2的发光材料可以包括香豆素染料、喹吖啶铜衍生物类绿色发光材料、多环芳香烃类绿色发光材料、二胺蒽衍生物类绿色发光材料、咔唑衍生物类绿色发光材料或者金属配合物类绿色发光材料中的任意一种或多种。
例如，绿色发光层EML2的发光材料可以包括香豆素6(C-6)、香豆素545T(C-525T)、喹吖啶铜(QA)、N,N’-二甲基喹吖啶酮(DMQA)、5,12-二苯基萘并萘(DPT)、N10,N10'-二苯基-N10,N10’-二苯二甲酰-9,9’-二蒽-10,10’-二胺(简称：BA-NPB)、三(8-羟基喹啉)合铝(III)(简称：Alq3)、三(2-苯基吡啶)合铱(Ⅲ)(Ir(ppy)3)或者乙酰丙酮酸·二(2-苯基吡啶)合铱(Ⅲ)(Ir(ppy)2(acac))中的任意一种或多种。
在一些实施例中，如图9A和图9B所示，蓝色发光器件23包括至少一个蓝色发光层 EML3。可以理解地，蓝色发光层EML3的数量可以是一个或者多个。蓝色发光器件23可以是包括多个蓝色发光层EML3的叠层发光器件，多个蓝色发光层EML3可以沿垂直于衬底基板10的方向依次叠置。
蓝色发光层EML3的发光材料可以包括芘衍生物类蓝色发光材料、蒽衍生物类蓝色发光材料、芴衍生物类蓝色发光材料、苝衍生物类蓝色发光材料、苯乙烯基胺衍生物类蓝色发光材料和金属配合物类蓝色发光材料中的任意一种或多种。金属配合物类蓝色发光材料可以包括铂、钯、铱、金、镍、银、铜或者铈金属配体元素中的至少一种。例如，金属配合物类蓝色发光材料可以包括铂金属配体元素。又例如，金属配合物类蓝色发光材料可以包括铜金属配体元素和铈金属配体元素。
例如，蓝色发光层EML3的发光材料可以包括N1,N6-二([1,1’-联苯]-2-基)-N1,N6-二([1,1’-联苯]-4-基)芘-1,6-二胺、9,10-二-(2-萘基)蒽(ADN)、2-甲基-9,10-二-2-萘基蒽(MADN)、2,5,8,11-四叔丁基苝(TBPe)、4,4’-二[4-(二苯氨基)苯乙烯基]联苯(BDAVBi)、4,4’-二[4-(二对甲苯基氨基)苯乙烯基]联苯(DPAVBi)、二(4,6-二氟苯基吡啶-C2,N)·吡啶甲酰合铱(Ⅲ)(FIrpic)、3-甲基-1-(3-{[9-(吡啶-2-基)咔唑-2-基]氧基}苯基)-2,3-二氢-1H-苯并[d]咪唑-2-亚基卡宾合铂(Ⅱ)、9-(吡啶-2-基)-2-[2-(吡啶-2-基)咔唑-9-基]咔唑合钯(Ⅱ)、二-[2,6-二氟-3-[4-(三甲基甲硅基)吡啶-2-基]吡啶]·2-[5-(三氟甲基)-2H-1,2,4-三氮杂环戊熳-3-基]吡啶合铱(Ⅱ)、2,6-双(2,4-二氟苯基)-4-(二甲基氨基)吡啶·三苯胺合金(Ⅲ)、三-[反-二-苯基乙烯]合镍(0)，2-(5-甲基-1,3,4-噻二唑)-乙基亚砜4-4’-二叔丁基-联吡啶合银(Ⅰ),2,6-二(2,4-二氟苯基)-4-(二甲基氨基)吡啶·苯基咔唑合铜(Ⅱ)或者二-(μ-氧)四-[1-{[双(3,5-二甲基吡唑-1-基)](甲基)-λ4-硼基}-3,5-二甲基吡唑]合二铈(Ⅲ)中的任意一种或多种。
在一些示例中，蓝色发光层EML3的发光材料可以是包括铂金属配体元素的金属配合物，例如3-甲基-1-(3-{[9-(吡啶-2-基)咔唑-2-基]氧基}苯基)-2,3-二氢-1H-苯并[d]咪唑-2-亚基卡宾合铂(Ⅱ)。由于金属配合物类蓝色发光材料的最低占据轨道(HOMO)和最高未占据轨道(LUMO)之间的能隙较窄，最低激发载流子的单线态与三线态之间的能级差较小，金属配合物类蓝色发光材料的空穴传输性能和电子传输性能较佳，因此采用金属配合物类蓝色发光材料，可以提高蓝色发光器件23的发光效率。
在一些实施例中，结合图3、图9A和图9B所示，多个发光器件分别覆盖多个发光开口，且多个发光器件分别和多个像素电路一一对应连接。其中，第一颜色发光器件覆盖第一发光开口，第二颜色发光器件覆盖第二发光开口，第三颜色发光器件覆盖第三发光开口。
多个发光器件可以包括多个红色发光器件21、多个绿色发光器件22和多个蓝色发光器件23。红色发光器件21可以覆盖第一发光开口K1，绿色发光器件22可以覆盖第二发光开口K2，并且蓝色发光器件23可以覆盖第三发光开口K3。
在一些实施例中，多个发光开口的面积之和，与显示面板100的显示区AA的面积的 比值大于或者等于0.15且小于或者等于0.65(例如0.15、0.18、0.20、0.22、0.25、0.35、0.40、0.45、0.50、0.55、0.60或者0.65)。
通过将多个发光开口的面积之和与显示面板100的显示区AA的面积的比值限定在合适的范围内，可以提高显示面板100中多个发光器件的有效发光面积，从而提升显示面板100中多个发光器件的发光效率。
在一些实施例中，多个第三发光开口K3的面积之和，占显示面板100的显示区AA的面积比例大于或者等于4％且小于或者等于25％(例如4％、6％、8％、10％、12％、15％、17％、18％、20％、22％或者25％)。
通过将多个第三发光开口K3的面积之和占显示面板100的显示区AA的面积比例限定在合适的范围内，可以提高显示面板100中对应覆盖第三发光开口K3的第三颜色发光器件的有效发光面积，从而提升第三颜色发光器件的发光效率和显示亮度。进而缩减显示面板100中第三颜色发光器件的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些示例中，多个第二发光开口K2的面积之和与多个第一发光开口K1的面积之和的比值大于1且小于或者等于4(例如1.1、1.5、1.8、2.0、2.3、2.5、2.8、3、3.5、3.8或者4)。
在一些示例中，多个第一发光开口K1的面积之和与多个第三发光开口K3的面积之和的比值大于或者等于0.4且小于或者等于0.8(例如0.4、0.5、0.6、0.7或者0.8)。
在一些示例中，多个第二发光开口K2的面积之和与多个第三发光开口K3的面积之和的比值大于或者等于0.8且小于或者等于1.5(例如0.8、0.9、1.0、1.2、1.4或者1.5)。
在一些示例中，多个第三发光开口K3的面积之和，与多个第一发光开口K1的面积和多个第二发光开口K2的面积之和的比值大于或者等于0.4且小于或者等于0.8(例如0.4、0.5、0.6、0.7或者0.8)。
在一些实施例中，多个第三发光开口K3的面积之和，占显示面板100的显示区AA的面积比例满足下列公式1：
公式1中，SB表示多个第三发光开口K3的面积之和占显示面板100的显示区AA的面积比例；L表示在第一工况下，第三颜色发光器件的工作亮度的最大值；JB表示在第一工况下，第三颜色发光器件的电流密度，单位为A/m2；ROB表示第三颜色发光器件的电流密度从5mA/cm2增加到10mA/cm2时，第三颜色发光器件的电流效率下降的比例；f表示第三颜色发光器件的外量子效率(External Quantum Efficiency，简称EQE)的最大值，定义为第三颜色发光器件对外辐射光子数与第三颜色发光器件中复合的空穴电子对数量之比的最 大值。第一工况为：显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33(例如0.30、0.31、0.32或者0.33)、纵坐标值大于或者等于0.31且小于或者等于0.34(例如0.31、0.32、0.33或者0.34)，且第三颜色发光器件的寿命大于或者等于300h(例如300h、320h、350h、380h或者400h)的工况。
其中，第三颜色发光器件的寿命为，显示面板100发出特定初始亮度的白光状态下，第三颜色发光器件的亮度衰减至该特定初始亮度的95％所需的时长LT95。
ROB的计算方法为ROB＝(E-E’)/E，其中E为第三颜色发光器件的电流密度为5mA/cm2时的电流效率，单位为cd/A；E’为第三颜色发光器件的电流密度为10mA/cm2时的电流效率，单位为cd/A。
这样，通过公式1计算多个第三发光开口K3的面积之和占显示面板100的显示区AA的面积比例SB，可以在保证第三颜色发光器件以及限定第三颜色发光器件的发光效率的衰减速度的基础上，最大化显示面板100中多个第三颜色发光器件的有效发光面积。从而提升第三颜色发光器件的发光效率和显示亮度。进而缩减显示面板100中第三颜色发光器件的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些实施例中，多个第二发光开口K2的面积之和，与多个第一发光开口K1的面积之和的比值满足下列公式2：
公式2中，SG表示多个第二发光开口K2的面积之和占显示面板100的显示区AA的面积比例；SR表示多个第一发光开口K1的面积之和占显示面板100的显示区AA的面积比例；EG表示第二颜色发光器件的电流密度为10mA/cm2时的电流效率,单位为cd/A；ER表示第一颜色发光器件的电流密度为10mA/cm2时的电流效率,单位为cd/A；ROG表示第二颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，第二颜色发光器件的电流效率下降的比例；ROR表示第一颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，第一颜色发光器件的电流效率下降的比例；klim表示在第二工况下第二颜色发光器件的工作电流与第一颜色发光器件的工作电流之间的比值的最大值。
第二工况为：显示面板100的工作亮度大于或者等于100nit且小于或者等于800nit(例如100nit、200nit、400nit、600nit或者800nit)，且显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33(例如0.30、0.31、0.32或者0.33)、纵坐标值大于或者等于0.31且小于或者等于0.34(例如0.31、0.32、0.33或者0.34)的工况。
这样，通过公式2计算多个第二发光开口K2的面积之和与多个第一发光开口K1的面积之和的比值，可以准确限定第一颜色发光器件的发光效率衰减的比例、第二颜色的发 光效率衰减的比例以及第二颜色发光器件的工作电流与第一颜色发光器件的工作电流之间的比值，可以使得显示面板100中第一颜色发光器件的亮度随时间衰减的比例和第二颜色发光器件的亮度随时间衰减的比例相接近。并且可以通过设定显示面板100发出的白色光线的色坐标相同的工况，使得同一显示面板100中第一颜色发光器件的亮度随时间衰减的比例和第二颜色发光器件的亮度随时间衰减的比例，适配第三颜色发光器件的亮度随时间衰减的比例，从而保证显示面板100的色域100％覆盖国家电视标准委员会(National Television Standards Committee，简称NTSC)色域标准，并且改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。发光器件的出光面积，可以理解为对应覆盖发光器件的发光开口的面积。多个红色发光器件21的出光面积之和，可以理解为一个显示面板100中全部红色发光器件21的出光面积之和。多个绿色发光器件22的出光面积之和，可以理解为一个显示面板100中全部绿色发光器件22的出光面积之和。多个蓝色发光器件23的出光面积之和，可以理解为一个显示面板100中全部蓝色发光器件23的出光面积之和。
在一些示例中，多个第一发光开口K1的面积之和与多个第二发光开口K2的面积之和的比值，与多个红色发光器件21的出光面积之和与多个绿色发光器件22的出光面积之和的比值大致相同。
这样，可以使得第一发光开口K1的面积占红色发光器件21的出光面积的比例，与第二发光开口K2的面积占绿色发光器件22的出光面积的比例大致相同，从而使得由第一发光开口K1的面积限定的红色发光器件21的有效发光面积占红色发光器件21的出光面积的比例，与由第二发光开口K2的面积限定的绿色发光器件22的有效发光面积占绿色发光器件22的出光面积的比例相同，可以减小同一显示面板100中红色发光器件21的显示性能和绿色发光器件22的显示性能之间的差异，进而可以提高显示面板100的显示性能的稳定性。
在一些示例中，多个第一发光开口K1的面积之和与多个第三发光开口K3的面积之和的比值，与多个红色发光器件21的出光面积之和与多个蓝色发光器件23的出光面积之和的比值大致相同。
这样，可以使得第一发光开口K1的面积占红色发光器件21的出光面积的比例，与第三发光开口K3的面积占蓝色发光器件23的出光面积的比例大致相同，从而使得由第一发光开口K1的面积限定的红色发光器件21的有效发光面积占红色发光器件21的出光面积的比例，与由第三发光开口K3的面积限定的蓝色发光器件23的有效发光面积占蓝色发光器件23的出光面积的比例相同，可以减小同一显示面板100中红色发光器件21的显示性能和蓝色发光器件23的显示性能之间的差异，进而可以提高显示面板100的显示性能的稳定性。
在一些示例中，多个第二发光开口K2的面积之和与多个第三发光开口K3的面积之和的比值，与多个绿色发光器件22的出光面积之和与多个蓝色发光器件23的出光面积之和的比值大致相同。
这样，可以使得第二发光开口K2的面积占绿色发光器件22的出光面积的比例，与第三发光开口K3的面积占蓝色发光器件23的出光面积的比例大致相同，从而使得由第二发光开口K2的面积限定的绿色发光器件22的有效发光面积占绿色发光器件22的出光面积的比例，与由第三发光开口K3的面积限定的蓝色发光器件23的有效发光面积占蓝色发光器件23的出光面积的比例相同，可以减小同一显示面板100中绿色发光器件22的显示性能和蓝色发光器件23的显示性能之间的差异，进而可以提高显示面板100的显示性能的稳定性。在一些实施例中，多个蓝色发光器件23的出光面积之和，占显示面板100的显示区的面积比例大于或者等于4％且小于或者等于25％(例如4％、6％、8％、10％、12％、15％、17％、18％、20％、22％或者25％)。
通过将多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例限定在合适的范围内，可以提高显示面板100中多个蓝色发光器件23的有效发光面积，从而提升蓝色发光器件23的发光效率以及显示面板100中蓝光的显示亮度，进而缩减显示面板100中蓝色发光器件23的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些示例中，多个蓝色发光器件23的出光面积之和，占显示面板100的显示区的面积比例大于或者等于5％且小于或者等于18％(例如5％、7％、9％、11％、13％、15％、16％或者18％)。
通过将多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例限定在合适的范围内，可以大幅提升蓝色发光器件23的发光效率以及显示面板100中蓝光的显示亮度，并且保证蓝色发光器件23的使用寿命，缩减蓝色发光器件23的发光效率和寿命随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。在一些实施例中，多个蓝色发光器件23的出光面积之和，占显示面板100的显示区的面积比例满足下列公式1：
公式1中，SB表示多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例；L表示在第一工况下，蓝色发光器件23的工作亮度的最大值；JB表示在第一工况下，蓝色发光器件23的电流密度，单位为A/m2；ROB表示蓝色发光器件23的电流密度从5mA/cm2增加到10mA/cm2时，蓝色发光器件23的电流效率下降的比例；f表示显示面板100的蓝光外量子效率的最大值，定义为蓝色发光器件对外辐射光子数与蓝色发光器件 中复合的空穴电子对数量之比的最大值。其中，蓝色光线的波长大于或者等于440nm且小于或者等于480nm(例如440nm、460nm或者480nm)。
其中，第一工况为：显示面板100发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33(例如0.30、0.31、0.32或者0.33)、纵坐标值大于或者等于0.31且小于或者等于0.34(例如0.31、0.32、0.33或者0.34)，且蓝色发光器件23的寿命大于或者等于300h(例如300h、320h、350h、380h或者400h)的工况。其中，蓝色发光器件23的寿命为，显示面板100发出特定初始亮度的白光状态下，蓝色发光器件23的亮度衰减至该特定初始亮度的95％所需的时长LT95。
ROB的计算方法为ROB＝(E-E’)/E，其中E为蓝色发光器件23的电流密度为5mA/cm2时的电流效率，单位为cd/A；E’为蓝色发光器件23的电流密度为10mA/cm2时的电流效率，单位为cd/A。
f的测定方法包括：将显示面板100调为蓝色显示画面(即仅点亮显示面板100中的多个蓝色发光器件23)；之后，将显示面板100放入积分球测试仪中，并在积分球测试仪中标定蓝色发光器件23的发光强度和蓝色发光器件23的对外辐射光子数的设定比值；通过积分球测试仪获取显示面板100中多个蓝色发光器件23全方位出射时的发光强度的值；之后，通过计算积分球测试仪获取的多个蓝色发光器件23全方位出射时的发光强度的值，与蓝色发光器件23的发光强度和蓝色发光器件23的对外辐射光子数的设定比值之间的比值，得到显示面板100中多个蓝色发光器件23的对外辐射光子数n1；之后，通过显示面板100外加电流功耗转换，得到蓝色发光器件23中复合的空穴电子对数量n2；最后，通过计算n1/n2即可得到f的测定值的最大值。
在一些示例中，公式1中蓝色发光器件23的相关参数L和JB的确定过程可以包括：首先，在显示面板100的初始白光色坐标值CIE为(0.30,0.31)时，测试蓝色发光器件23的电流密度和亮度。
其次，根据蓝色发光器件23的电流密度和亮度的测试数据，绘制横坐标为蓝色发光器件23的电流密度、纵坐标为蓝色发光器件23的亮度的曲线。
之后，在显示面板100发出的白光色坐标的横坐标值大于或者等于0.30且小于或者等于0.33(例如0.30、0.31、0.32或0.33)、纵坐标值大于或者等于0.31且小于或者等于0.34(例如0.31、0.32、0.33或0.34)的条件下，测试在特定初始亮度(例如1000nit)的白光发光状态下，蓝色发光器件23的发光亮度衰减至初始亮度的95％所需的时长LT95。若显示面板100发出的白光对应的色坐标值超出范围则须降低白光的特定初始亮度重新测试。
直至，蓝色发光器件23的LT95满足大于或者等于300h(例如300h、320h、350h、380h或400h)的条件下，得到通过指数衰减(the stretched exponential decay，简称SED)模型计算蓝色发光器件23的工作亮度的最大值，即得到L的数值。其中，SED模型的数学 表达式包括下列公式3和公式4：

C＝L0 nt95            公式4
上述公式3和公式4中，L表示蓝色发光器件23在特定时间t时的相对发光强度，L0为初始时刻的发光强度；α表示特征寿命值，蓝色发光器件23的寿命图像中t＝α时，s(t)＝exp(-1)，此时的横坐标数值为α；β表示蓝色发光器件23的特征指数，β为0～1的常数；t95为蓝色发光器件23的发光亮度衰减至初始亮度的95％所需的时长，即LT95；C表示测试发光器件过程中的设定值；n表示蓝色发光器件23的发光亮度衰减因子，n与蓝色发光器件23的结构及材料性能相关，可以通过多次老化实验测试不同蓝色发光器件23的发光亮度与LT95，并通过公式4计算得到n。
最后，根据横坐标为蓝色发光器件23的电流密度、纵坐标为蓝色发光器件23的亮度的曲线，确定在第一工况下蓝色发光器件23的电流密度JB的数值。
示例性地，L的取值范围大于或者等于100nit且小于或者等于800nit，例如L为100nit、200nit、400nit、600nit或者800nit。又例如，在第一工况下蓝色发光器件23的工作亮度可以为400nit或者800nit，则L的取值为800nit。
这样，通过公式1计算多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例SB，可以在保证蓝色发光器件23的寿命以及限定蓝色发光器件23的发光效率的衰减速度的基础上，最大化显示面板100中多个蓝色发光器件23的有效发光面积，从而提升蓝色发光器件23的发光效率以及显示面板100中蓝光的显示亮度，降低蓝色发光器件23的工作载荷，进而缩减蓝色发光器件23的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些实施例中，显示区AA包括多个发光器件的发光区、以及除多个发光器件的发光区之外的非发光区。发光器件的发光区的面积，可以理解为对应覆盖发光器件的发光开口的面积，即发光器件的出光面积。
其中，非发光区的面积占显示面板100的显示区的面积比例大于或者等于35％且小于或者等于82％(例如35％、40％、45％、50％、55％、60％、65％、70％、72％、75％、78％、80％或者82％)。
在一些实施例中，多个发光开口的面积之和，与非发光区的面积的比值大于或者等于0.2且小于或者等于2.0(例如0.2、0.22、0.25、0.30、0.35、0.4、0.5、0.6、0.7、0.8、0.9、1.2、1.5、1.6、1.8或者2.0)。
通过将多个发光开口的面积之和与非发光区的面积的比值限定在合适的范围内，可以提高显示面板100中多个发光器件的有效发光面积，从而提升显示面板100中多个发光器 件的发光效率。
在一些实施例中，多个蓝色发光器件23的出光面积之和，与非发光区的面积的比例可以大于或者等于4％且小于或者等于75％(例如4％、8％、10％、15％、20％、22％、25％、28％、30％、35％、40％、45％、50％、55％、60％、65％、70％或者75％)。
通过将多个蓝色发光器件23的出光面积之和与非发光区的面积的比例限定在合适的范围内，可以相对提高显示面板100中多个蓝色发光器件23发出的蓝光的亮度，改善显示面板100中蓝光的亮度弱的现象，并且缩减了显示面板100中蓝色发光器件23的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些实施例中，多个绿色发光器件22的出光面积之和，与多个红色发光器件21的出光面积之和的比值大于1且小于或者等于4(例如1.1、1.5、1.8、2.0、2.3、2.5、2.8、3、3.5、3.8或者4)。
由于红色发光器件21的发光效率高于绿色发光器件22的发光效率，限定多个绿色发光器件22的出光面积之和与多个红色发光器件21的出光面积之和的比值，可以相对降低多个红色发光器件21的出光面积，因此可以相对降低红色发光器件21的亮度和发光效率，进而缩小红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例之间的差异，从而改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些示例中，多个绿色发光器件22的出光面积之和，与多个红色发光器件21的出光面积之和的比值大于1且小于或者等于3(例如1.2、1.4、1.7、2.1、2.4、2.6、2.9或者3)。
将多个绿色发光器件22的出光面积之和与多个红色发光器件21的出光面积之和的比值限定在合适的范围内，可以相对降低多个红色发光器件21的出光面积，进一步使得红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例之间的差异较小，从而有效地改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，多个绿色发光器件22的出光面积之和，与多个红色发光器件21的出光面积之和的比值满足下列公式2：
公式2中，SG表示多个绿色发光器件22的出光面积之和占显示面板100的显示区的面积比例；SR表示多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例；EG表示绿色发光器件22的电流密度为10mA/cm2时的电流效率，单位为cd/A；ER表示红色发光器件21的电流密度为10mA/cm2时的电流效率，单位为cd/A；ROG表示绿色 发光器件22的电流密度从10mA/cm2增加到20mA/cm2时，绿色发光器件22的电流效率下降的比例；ROR表示红色发光器件21的电流密度从10mA/cm2增加到20mA/cm2时，红色发光器件21的电流效率下降的比例；klim表示在第二工况下绿色发光器件22的工作电流与红色发光器件21的工作电流之间的比值的最大值。
第二工况为：显示面板100的工作亮度大于或者等于100nit且小于或者等于800nit(例如100nit、200nit、400nit、600nit或者800nit)，且显示面板100发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33(例如0.30、0.31、0.32或者0.33)、纵坐标值大于或者等于0.31且小于或者等于0.34(例如0.31、0.32、0.33或者0.34)的工况。
其中，ROR的计算方法为ROR＝(ER-ER’)/ER，其中ER’为红色发光器件21的电流密度为20mA/cm2时的电流效率，单位为cd/A。
ROG的计算方法为ROG＝(EG-EG’)/EG，其中EG’为绿色发光器件22的电流密度为20mA/cm2时的电流效率，单位为cd/A。
这样，通过公式2计算多个绿色发光器件22的出光面积之和与多个红色发光器件21的出光面积之和的比值，可以准确限定红色发光器件21的发光效率衰减的比例、绿色发光器件22的发光效率衰减的比例以及绿色发光器件22的工作电流与红色发光器件21的工作电流之间的比值，可以使得显示面板100中红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例相接近。并且可以通过设定显示面板100发出的白色光线的色坐标相同的工况，使得同一显示面板100中红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例，适配蓝色发光器件23的亮度随时间衰减的比例，从而保证显示面板100的色域100％覆盖NTSC色域标准，并且改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，多个红色发光器件21的出光面积之和与多个蓝色发光器件23的出光面积之和的比值大于或者等于0.4且小于或者等于0.8(例如0.4、0.5、0.6、0.7或者0.8)。
由于红色发光器件21的发光效率高于蓝色发光器件23的发光效率，限定多个红色发光器件21的出光面积之和与多个蓝色发光器件23的出光面积之和的比值，可以相对降低多个红色发光器件21的出光面积，因此可以相对降低红色发光器件21的亮度和发光效率，进而缩小红色发光器件21的发光效率和蓝色发光器件23的发光效率之间的差异，使得显示面板100中红色发光器件21的亮度随时间衰减的比例和蓝色发光器件23的亮度随时间衰减的比例相接近，从而改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，多个绿色发光器件22的出光面积之和与多个蓝色发光器件23的出光面积之和的比值大于或者等于0.8且小于或者等于1.5(例如0.8、0.9、1.0、1.2、1.4或者 1.5)。
通过限定多个绿色发光器件22的出光面积之和与多个蓝色发光器件23的出光面积之和的比值，可以使得显示面板100中绿色发光器件22的亮度随时间衰减的比例适配蓝色发光器件23的亮度随时间衰减的比例，在保证显示面板100的色域100％覆盖NTSC色域标准的基础上，改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，多个绿色发光器件22的出光面积之和占显示面板100的显示区的面积比例，大于多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例。多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例，也大于多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例。
由于红色发光器件21的发光效率大于绿色发光器件22的发光效率且大于蓝色发光器件23的发光效率，通过限定显示面板100的显示区中多个绿色发光器件22的出光面积之和的占比大于多个红色发光器件21的出光面积之和，以及限定多个蓝色发光器件23的出光面积之和的占比大于多个红色发光器件21的出光面积之和，可以使得同一显示面板100中红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例相接近，从而保证显示面板100的色域100％覆盖NTSC色域标准，并且改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，多个蓝色发光器件23的出光面积之和，与多个绿色发光器件22的出光面积和多个红色发光器件21的出光面积之和的比值大于或者等于0.4且小于或者等于0.8(例如0.4、0.5、0.6、0.7或者0.8)。可以理解为，上述公式1中的SB与上述公式2中的SG和SR之和的比值，大于或者等于0.4且小于或者等于0.8。
通过限定多个蓝色发光器件23的出光面积之和与多个绿色发光器件22的出光面积和多个红色发光器件21的出光面积之和的比值，可以相对提高蓝色发光器件23的发光效率，使得同一显示面板100中红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例，适配蓝色发光器件23的亮度随时间衰减的比例，从而保证显示面板100的色域100％覆盖NTSC色域标准，并且改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
在一些实施例中，如图3和图9A所示，封装层30可以位于第二电极CE远离衬底基板10的一侧。封装层30可以是单层结构，也可以是多层复合结构。封装层30被配置为阻隔水氧浸入发光单元20。
在一些示例中，封装层30可以包括沿发光单元20远离衬底基板10的方向依次叠置的第一无机层31、有机层32和第二无机层33。
示例性地，第一无机层31和第二无机层33沿垂直于衬底基板10的方向的尺寸大于或者等于0.5μm且小于或者等于2.0μm(例如0.5μm、0.8μm、1.0μm、1.2μm、1.5μm、1.7μm或者2.0μm)。又例如，第一无机层31沿垂直于衬底基板10的方向的尺寸可以是1.0μm，第二无机层33沿垂直于衬底基板10的方向的尺寸可以是0.7μm。
示例性地，第一无机层31和第二无机层33的材料可以选自氮化硅、氮化铝、氮化锆、氮化钛、氮化铪、氮化钽、氧化硅、氧化铝、氧化钛、氧化锡、氧化铈、氮氧化硅或氟化锂中的至少一种。有机层32的材料可以为烯酸树脂、甲基丙烯酸树脂、聚异戊二烯，乙烯基树脂、环氧树脂、聚氨酯树脂、纤维素树脂或二萘嵌苯树脂中的至少一种。本领域技术人员可以根据需要改变薄膜封装层30的层数、材料和结构，本公开不限于此。
图11和图12分别为根据一些实施例的显示面板的结构图。
在一些实施例中，如图9A和图11所示，显示面板100还可以包括光阻体40。光阻体40可以位于封装层30远离衬底基板10的一侧，且光阻体40位于显示面板100的非发光区。示例性地，光阻体40可以位于第二无机层远离衬底基板10的一侧。例如，光阻体40的材料可以为黑色矩阵。
其中，如图9A所示，显示面板100中与光阻体40处于同层的位于发光区的部分，可以通过填充光学透明胶(Optically Clear Adhesive，简称OCA)的方式制成平坦表面，以便于制作后续工艺中的部件。
光阻体40被配置为防止其他发光区射出的不同颜色的光线进入发光区，以保证每个发光区射出的光线的颜色纯度，提高各个发光区射出的光线颜色的对比度，从而提高显示面板100的显示效果。
在一些实施例中，如图11所示，显示面板100还可以包括彩色滤光膜50。彩色滤光膜50可以与光阻体40同层设置，且彩色滤光膜50位于显示面板100的发光区。可以理解为，光阻体40和彩色滤光膜50均制作于封装层30远离衬底基板10的表面上。
其中，光阻体40和彩色滤光膜50在沿垂直于衬底基板10的方向上的尺寸可以不同，可以通过在光阻体40和彩色滤光膜50远离衬底基板10的表面上涂覆光学透明胶OCA的方式将其制成平坦表面，以便于制作后续工艺中的部件。
通过彩色滤光膜50可以减少发光器件发出的光线的反射，滤除显示光线中的杂色，提高显示面板100的出光效率和显示光线的饱和度，从而提高显示装置1000的显示效果。
在一些示例中，如图11所示，彩色滤光膜50可以包括第一滤光膜段51、第二滤光膜段52或者第三滤光膜段53中的至少一段。例如，彩色滤光膜50可以包括第一滤光膜段51、第二滤光膜段52和第三滤光膜段53。第一滤光膜段51覆盖第一子像素区P1，第二滤光膜段52覆盖第二子像素区P2，第三滤光膜段53覆盖第三子像素区P3。
其中，第一滤光膜段51可以透射红色光线。第一滤光膜段51的透射光线的波长大于 或者等于650nm且小于或者等于720nm(例如650nm、680nm、700nm或者720nm)。
第二滤光膜段52可以透射绿色光线。第二滤光膜段52的透射光线的波长大于或者等于500nm且小于或者等于600nm(例如500nm、540nm、580nm或者600nm)。
第三滤光膜段53可以透射蓝色光线。第三滤光膜段53的透射光线的波长大于或者等于430nm且小于或者等于480nm(例如430nm、450nm、460nm或者480nm)。
在一些示例中，彩色滤光膜50的透射光谱与对应发光器件的发射光谱之间的重叠比例大于或者等于80％(例如80％、82％、85％、90％或者95％)。彩色滤光膜50的透射光谱与对应发光器件的发射光谱之间的重叠比例越大，发光器件发出的光线透过彩色滤光膜50的光量越多。
在一些实施例中，如图9A和图12所示，显示面板100还可以包括光学功能层60。光学功能层60可以位于封装层30远离衬底基板10的一侧，光学功能层60被配置为使从发光器件发出的光线折射后成为偏振光线。例如，光学功能层60可以是四分之一波片。
光学功能层60可以改变从发光器件发出的光线的传播方向，提高显示面板100的出光效率。
在一些实施例中，如图9A所示，显示面板100还可以包括光增益层70。光增益层70可以位于发光单元20和光学功能层60之间，包括沿垂直于衬底基板10的方向依次叠置的红光增益层、绿光增益层和蓝光增益层中的至少一层。光增益层70可以提高显示面板100的亮度和发光效率，并且改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
其中，红光增益层可以透射光线波长大于或者等于650nm且小于或者等于720nm(例如650nm、680nm、700nm或者720nm)的红色光线。绿光增益层可以透射光线的波长大于或者等于500nm且小于或者等于600nm(例如500nm、540nm、580nm或者600nm)的绿色光线。蓝光增益层可以透射光线的波长大于或者等于430nm且小于或者等于480nm(例如430nm、450nm、460nm或者480nm)的蓝色光线。
示例性地，红光增益层、绿光增益层和蓝光增益层沿垂直于衬底基板10方向的尺寸均大于或者等于4μm且小于或者等于6μm(例如4μm、4.5μm、5μm或者6μm)。相邻的红光增益层、绿光增益层和蓝光增益层之间分别可以通过光学透明胶OCA进行粘合。
示例性地，光增益层70可以是圆偏振光增益层70。光增益层70的反射率大于或者等于45％(例如45％、50％、60％、65％或者70％)。除红色光线、绿色光线和蓝色光线之外，波长大于或者等于400nm且小于或者等于800nm(例如400nm、500nm、600nm、700nm或者800nm)的光线透过圆偏振片的透过率大于或者等于95％(例如95％、96％、97％或者98％)。
在一些示例中，光增益层70可以包括沿垂直于衬底基板10的方向依次叠置的绿光增 益层和蓝光增益层。
通过绿光增益层和蓝光增益层，可以提高同一显示面板100中绿色发光器件22和蓝色发光器件23的亮度，从而使得绿色发光器件22的亮度衰减的比例和蓝色发光器件23的亮度衰减的比例，接近于红色发光器件21的亮度衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
在一些实施例中，如图9A和图12所示，显示面板100还可以包括抗反射层80。抗反射层80位于发光单元20远离衬底基板10的一侧，被配置为使从发光器件发出的光线向靠近垂直于衬底基板10的方向偏转。
在一些示例中，如图12所示，抗反射层80可以位于光学功能层60远离封装层30的表面。从发光器件发出的光线先经过光学功能层60成为偏振光线，偏振光线再进入抗反射层80，可以使得从发光器件发出的光线向靠近垂直于衬底基板10的方向偏转，减少从发光器件发出的光线的反射，可以提高显示面板100的显示光线的对比度，从而提高显示装置1000的显示效果。
在一些示例中，如图9A所示，抗反射层80可以位于光学功能层60远离光增益层70的表面。从发光器件发出的光线先经过光增益层70提高亮度，然后经过光学功能层60成为偏振光线，偏振光线再进入抗反射层80，可以减少从发光器件发出的光线的反射，可以提高显示面板100的显示光线的对比度和亮度，从而提高显示装置1000的显示效果。
如图12所示，显示面板100包括衬底基板10、发光单元20、封装层30、光学功能层60和抗反射层80。发光单元20位于衬底基板10的一侧，封装层30位于发光单元20远离衬底基板10的表面，光学功能层60位于封装层30远离发光单元20的表面，抗反射层80位于光学功能层60远离封装层30的表面。制备宏观结构与图12所示的显示面板100大致相同的实验器件1、实验器件2和实验器件3，以及对比器件1、对比器件2和对比器件3。实验器件1、实验器件2、实验器件3、对比器件1、对比器件2和对比器件3的具体性能参数如下表1所示：
表1
实验器件1、实验器件2、实验器件3、对比器件1、对比器件2和对比器件3的主要区别在于：多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例SR、多个绿色发光器件22的出光面积之和占显示面板100的显示区的面积比例SG以及多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例SB不同。
基于表1的数据，以及如图12所示的显示面板100中的f取值为0.43，通过前述公式1和前述公式2的计算可得，实验器件1、实验器件2、实验器件3、对比器件1、对比器件2和对比器件3各自的参数SR、SG、SB如下表2所示：
表2
表2中，Des.SR/SG@公式2表示根据公式2计算所得的SR/SG的取值范围；Des.SB@公式1表示根据公式1计算所得的SB的取值范围；LR、LG、LB分别为同一显示面板100中红色发光器件21、绿色发光器件22和蓝色发光器件23老化实验后的剩余亮度与初始亮度的千分比，即显示面板100在白光色坐标值CIE为(0.31，0.32)、亮度为800cd/m2的工况下持续点亮200h后，红色发光器件21的剩余亮度与初始亮度的千分比LR、绿色发光器件22的剩余亮度与初始亮度的千分比LG和蓝色发光器件23的剩余亮度与初始亮度的千分比LB；LR：LG：LB表示红色发光器件21的剩余亮度与初始亮度的千分比、绿色发光器件22的剩余亮度与初始亮度的千分比和蓝色发光器件23的剩余亮度与初始亮度的千分比之比。
基于表1的数据和表2的数据可知，实验器件1～实验器件3与对比器件1～对比器件3中：所有红色发光器件21的出光面积、所有绿色发光器件22的出光面积和所有蓝色发光器件23的出光面积之和占显示面板100的显示区的比例相同、初始白光色坐标值相同。实验器件1～实验器件3与对比器件1～对比器件3之间的主要区别在于：实验器件1、实验器件2和实验器件3满足公式1计算所得的SB的取值范围以及公式2计算所得的SG/SR 的取值范围；对比器件1满足公式2计算所得的SG/SR的取值范围，但不满足公式1计算所得的SB的取值范围；对比器件2满足公式1计算所得的SB的取值范围，但不满足公式2计算所得的SG/SR的取值范围；对比器件3既不满足公式1计算所得的SB的取值范围，也不满足公式2计算所得的SG/SR的取值范围。
参照对比表2中的参数LR:LG:LB可见：实验器件1、实验器件2和实验器件3中红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例相接近，实验器件1、实验器件2和实验器件3中未出现明显的白光色坐标偏移现象。对比器件1中蓝色发光器件23的亮度随时间衰减的比例过快。对比器件2中红色发光器件21的亮度随时间衰减的比例过快。对比器件3中绿色发光器件22的亮度随时间衰减的比例过快。并且对比器件1、对比器件2和对比器件3中均出现了明显的白光色坐标偏移现象。可以理解地，通过公式1计算SB可以缩减蓝色发光器件23的亮度随时间衰减的比例，通过公式2计算SG/SR可以使得红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例相接近。同时可以通过设定显示面板100发出的白色光线的色坐标相同的工况，使得同一显示面板100中红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例相接近，从而改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
如图9A所示，显示面板100包括衬底基板10、发光单元20、封装层30、光增益层70、光学功能层60和抗反射层80。发光单元20位于衬底基板10的一侧，封装层30位于发光单元20远离衬底基板10的表面，光增益层70位于封装层30远离发光单元20的表面，光学功能层60位于光增益层70远离封装层30的表面，抗反射层80位于光学功能层60远离光增益层70的表面。制备宏观结构与图9A所示的显示面板100大致相同的实验器件4、实验器件5和实验器件6，以及对比器件4、对比器件5和对比器件6。实验器件4、实验器件5、实验器件6、对比器件4、对比器件5和对比器件6的具体性能参数如下表3所示：
表3

表3续
实验器件4、实验器件5、实验器件6、对比器件4、对比器件5和对比器件6的主要区别在于：多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例SR、多个绿色发光器件22的出光面积之和占显示面板100的显示区的面积比例SG以及多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例SB不同。
基于表3的数据，以及如图9A所示的显示面板100中f取值为0.7，通过前述公式1和前述公式2的计算可得，实验器件4、实验器件5、实验器件6、对比器件4、对比器件5和对比器件6各自的参数SR、SG、SB如下表4所示：
表4
基于表3的数据和表4的数据可知，实验器件4～实验器件6与对比器件4～对比器件6中：所有红色发光器件21的出光面积、所有绿色发光器件22的出光面积和所有蓝色发光器件23的出光面积之和占显示面板100的显示区的比例相同、初始白光色坐标值相同。实验器件4～实验器件6与对比器件4～对比器件6之间的主要区别在于：实验器件4、实验器件5和实验器件6满足公式1计算所得的SB的取值范围以及公式2计算所得的SG/SR的取值范围；对比器件4满足公式2计算所得的SG/SR的取值范围，但不满足公式1计算所得的SB的取值范围；对比器件5满足公式1计算所得的SB的取值范围，但不满足公式2计算所得的SG/SR的取值范围；对比器件6满足公式2计算所得的SG/SR的取值范围，但不满足公式1计算所得的SB的取值范围。
参照对比表4中的参数LR:LG:LB可见：实验器件4、实验器件5和实验器件6中红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例相接近，实验器件4、实验器件5和实验器件6 中未出现明显的白光色坐标偏移现象。对比器件4、对比器件5和对比器件6中蓝色发光器件23的亮度随时间衰减的比例明显快于红色发光器件21的亮度随时间衰减的比例，蓝色发光器件23的亮度随时间衰减的比例也明显快于绿色发光器件22的亮度随时间衰减的比例，并且对比器件4、对比器件5和对比器件6中均出现了明显的白光色坐标偏移现象。
实验器件4～实验器件6与实验器件1～实验器件3的主要区别在于：实验器件4～实验器件6包括光增益层70和光学功能层60。参照对比表2中的参数LR:LG:LB和对比表4中的参数LR:LG:LB可见：实验器件4～实验器件6相较于实验器件1～实验器件3，红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例更加接近，且各个发光器件的亮度和发光效率更高。可以理解为，光增益层70和光学功能层60可以提高显示面板100的亮度和发光效率，并且改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
如图11所示，显示面板100可以包括衬底基板10、发光单元20、封装层30、光阻体40和彩色滤光膜50。发光单元20位于衬底基板10的一侧，封装层30位于发光单元20远离衬底基板10的表面，光阻体40和彩色滤光膜50同层设置于封装层30远离发光单元20的表面。制备宏观结构与图11所示的显示面板100大致相同的实验器件7、实验器件8和实验器件9，以及对比器件7、对比器件8和对比器件9。实验器件7、实验器件8、实验器件9、对比器件7、对比器件8和对比器件9的具体性能参数如下表5所示：
表5
实验器件7、实验器件8、实验器件9、对比器件7、对比器件8和对比器件9的主要区别在于：多个红色发光器件21的出光面积之和占显示面板100的显示区的面积比例SR、多个绿色发光器件22的出光面积之和占显示面板100的显示区的面积比例SG以及多个蓝色发光器件23的出光面积之和占显示面板100的显示区的面积比例SB不同。
基于表5的数据，以及如图11所示的显示面板100中f取值为0.8，通过前述公式1和前述公式2的计算可得，实验器件7、实验器件8、实验器件9、对比器件7、对比器件8和对比器件9各自的参数SR、SG、SB如下表6所示：
表6
基于表5的数据和表6的数据可知，实验器件7～实验器件9与对比器件7～对比器件9中：所有红色发光器件21的出光面积、所有绿色发光器件22的出光面积和所有蓝色发光器件23的出光面积之和占显示面板100的显示区的比例相同、初始白光色坐标值相同。实验器件7～实验器件9与对比器件7～对比器件9之间的主要区别在于：实验器件7、实验器件8和实验器件9满足公式1计算所得的SB的取值范围以及公式2计算所得的SG/SR的取值范围；对比器件7满足公式2计算所得的SG/SR的取值范围，但不满足公式1计算所得的SB的取值范围；对比器件8满足公式1计算所得的SB的取值范围，但不满足公式2计算所得的SG/SR的取值范围；对比器件9满足公式1计算所得的SB的取值范围，但不满足公式2计算所得的SG/SR的取值范围。
参照对比表6中的参数LR:LG:LB可见：实验器件7、实验器件8和实验器件9中红色发光器件21的亮度随时间衰减的比例、绿色发光器件22的亮度随时间衰减的比例以及蓝色发光器件23的亮度随时间衰减的比例相接近，实验器件7、实验器件8和实验器件9中未出现明显的白光色坐标偏移现象。对比器件7中蓝色发光器件23的亮度随时间衰减的比例过快。对比器件8中红色发光器件21的亮度随时间衰减的比例快于绿色发光器件22的亮度随时间衰减的比例，蓝色发光器件23的亮度随时间衰减的比例也快于绿色发光器件22的亮度随时间衰减的比例。对比器件9中蓝色发光器件23的亮度随时间衰减的比例过快。并且对比器件7和对比器件9中均出现了明显的白光色坐标偏移现象。可以理解地，同一显示面板100中红色发光器件21的亮度随时间衰减的比例和绿色发光器件22的亮度随时间衰减的比例，适配蓝色发光器件23的亮度随时间衰减的比例，可以改善显示面板100的显色偏移现象，提高显示面板100的显示性能的稳定性和显示效果。
综上所述，本公开实施例提供的显示面板100和显示装置1000中，通过将多个蓝色 发光器件23的出光面积之和占显示面板100的显示区的面积比例限定在合适的范围内，可以提高显示面板100中多个蓝色发光器件23的有效发光面积，从而提升蓝色发光器件23的发光效率以及显示面板100中蓝光的显示亮度，进而缩减显示面板100中蓝色发光器件23的亮度随时间衰减的比例，从而改善显示面板100的显色偏移现象，提升显示装置1000的显示效果。
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，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 (20)

  1. 一种显示面板，包括显示区和非显示区，所述显示面板还包括：
    衬底基板；
    发光单元，位于所述衬底基板的一侧；所述发光单元包括多个发光器件；所述多个发光器件包括多个红色发光器件、多个绿色发光器件和多个蓝色发光器件；
    其中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例大于或者等于4％且小于或者等于25％。
  2. 根据权利要求1所述的显示面板，其中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例大于或者等于5％且小于或者等于18％。
  3. 根据权利要求1或2所述的显示面板，其中，所述多个蓝色发光器件的出光面积之和，占所述显示面板的显示区的面积比例满足下列公式1：
    所述公式1中，SB表示所述多个蓝色发光器件的出光面积之和占所述显示面板的显示区的面积比例；L表示在第一工况下，所述蓝色发光器件的工作亮度的最大值；JB表示在所述第一工况下，所述蓝色发光器件的电流密度；ROB表示所述蓝色发光器件的电流密度从5mA/cm2增加到10mA/cm2时，所述蓝色发光器件的电流效率下降的比例；f表示所述蓝色发光器件的外量子效率的最大值，定义为所述蓝色发光器件对外辐射光子数与所述蓝色发光器件中复合的空穴电子对数量之比的最大值；
    所述第一工况为：所述显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34，且所述蓝色发光器件的寿命大于或者等于300h的工况。
  4. 根据权利要求1～3中任一项所述的显示面板，其中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值大于1且小于或者等于4。
  5. 根据权利要求1～4中任一项所述的显示面板，其中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值大于1且小于或者等于3。
  6. 根据权利要求1～5中任一项所述的显示面板，其中，所述多个绿色发光器件的出光面积之和，与所述多个红色发光器件的出光面积之和的比值满足下列公式2：
    所述公式2中，SG表示所述多个绿色发光器件的出光面积之和占所述显示面板的显示区的面积比例；SR表示所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例；EG表示所述绿色发光器件的电流密度为10mA/cm2时的电流效率；ER表示所述红色发光器件的电流密度为10mA/cm2时的电流效率；ROG表示所述绿色发光器件的电流 密度从10mA/cm2增加到20mA/cm2时，所述绿色发光器件的电流效率下降的比例；ROR表示所述红色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述红色发光器件的电流效率下降的比例；klim表示在第二工况下所述绿色发光器件的工作电流与所述红色发光器件的工作电流之间的比值的最大值；
    所述第二工况为：所述显示面板的工作亮度大于或者等于100nit且小于或者等于800nit，且显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34的工况。
  7. 根据权利要求1～6中任一项所述的显示面板，其中，所述蓝色发光器件包括至少一个蓝色发光层；所述蓝色发光层的发光材料包括金属配合物；
    所述金属配合物包括铂、钯、铱、金、镍、银、铜或铈金属配体元素中的至少一种。
  8. 根据权利要求1～7中任一项所述的显示面板，还包括：
    像素界定层，位于所述衬底基板之上，开设有多个发光开口；所述多个发光开口包括多个第一发光开口、多个第二发光开口和多个第三发光开口，所述红色发光器件覆盖所述第一发光开口，所述绿色发光器件覆盖所述第二发光开口，所述蓝色发光器件覆盖所述第三发光开口；
    所述多个第一发光开口的面积之和与所述多个第二发光开口的面积之和的比值，与所述多个红色发光器件的出光面积之和与所述多个绿色发光器件的出光面积之和的比值大致相同；和/或，
    所述多个第一发光开口的面积之和与所述多个第三发光开口的面积之和的比值，与所述多个红色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大致相同；和/或，
    所述多个第二发光开口的面积之和与所述多个第三发光开口的面积之和的比值，与所述多个绿色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大致相同。
  9. 根据权利要求1～8中任一项所述的显示面板，其中，所述多个绿色发光器件的出光面积之和占所述显示面板的显示区的面积比例，大于所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例；
    所述多个蓝色发光器件的出光面积之和占所述显示面板的显示区的面积比例，也大于所述多个红色发光器件的出光面积之和占所述显示面板的显示区的面积比例。
  10. 根据权利要求1～9中任一项所述的显示面板，其中，所述多个红色发光器件的出光面积之和与所述多个蓝色发光器件的出光面积之和的比值大于或者等于0.4且小于或者等于0.8。
  11. 根据权利要求1～10中任一项所述的显示面板，其中，所述多个绿色发光器件的出 光面积之和与所述多个蓝色发光器件的出光面积之和的比值大于或者等于0.8且小于或者等于1.5。
  12. 根据权利要求1～11中任一项所述的显示面板，其中，所述多个蓝色发光器件的出光面积之和，与所述多个绿色发光器件的出光面积和所述多个红色发光器件的出光面积之和的比值大于或者等于0.4且小于或者等于0.8。
  13. 根据权利要求1～12中任一项所述的显示面板，其中，所述显示区包括所述多个发光器件的发光区、以及除所述多个发光器件的发光区之外的非发光区；
    所述多个蓝色发光器件的出光面积之和，与所述非发光区的面积的比例大于或者等于4％且小于或者等于75％。
  14. 根据权利要求13所述的显示面板，还包括：
    像素界定层，位于所述衬底基板之上，开设有多个发光开口；
    其中，所述多个发光开口的面积之和，与所述非发光区的面积的比值大于或者等于0.2且小于或者等于2.0；和/或，
    所述多个发光开口的面积之和，与所述显示面板的显示区的面积的比值大于或者等于0.15且小于或者等于0.65。
  15. 根据权利要求1～14中任一项所述的显示面板，还包括：
    抗反射层，位于所述发光单元远离所述衬底基板的一侧，被配置为使从所述发光器件发出的光线向靠近垂直于所述衬底基板的方向偏转。
  16. 根据权利要求15所述的显示面板，还包括：
    光学功能层，位于所述发光单元和所述抗反射层之间，被配置为使从所述发光器件发出的光线折射后成为偏振光线。
  17. 根据权利要求16所述的显示面板，还包括：
    光增益层，位于所述发光单元和所述光学功能层之间，包括沿垂直于所述衬底基板的方向依次叠置的红光增益层、绿光增益层和蓝光增益层中的至少一层。
  18. 一种显示面板，包括显示区和非显示区，所述显示面板还包括：
    衬底基板；
    像素界定层，位于所述衬底基板之上，开设有多个第一发光开口、多个第二发光开口和多个第三发光开口；
    发光单元，包括多个发光器件；所述多个发光器件包括多个第一颜色发光器件、多个第二颜色发光器件和多个第三颜色发光器件；所述第一颜色发光器件覆盖所述第一发光开口，所述第二颜色发光器件覆盖所述第二发光开口，所述第三颜色发光器件覆盖所述第三发光开口；
    其中，所述多个第三发光开口的面积之和，占所述显示面板的显示区的面积比例大于 或者等于4％且小于或者等于25％；和/或，
    所述多个第三发光开口的面积之和，占所述显示面板的显示区的面积比例满足下列公式1：
    所述公式1中，SB表示所述多个第三发光开口的面积之和占所述显示面板的显示区的面积比例；L表示在第一工况下，所述第三颜色发光器件的工作亮度的最大值；JB表示在所述第一工况下，所述第三颜色发光器件的电流密度；ROB表示所述第三颜色发光器件的电流密度从5mA/cm2增加到10mA/cm2时，所述第三颜色发光器件的电流效率下降的比例；f表示所述第三颜色发光器件的外量子效率的最大值，定义为所述第三颜色发光器件对外辐射光子数与所述第三颜色发光器件中复合的空穴电子对数量之比的最大值；
    所述第一工况为：所述显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34，且所述第三颜色发光器件的寿命大于或者等于300h的工况。
  19. 根据权利要求18所述的显示面板，其中，所述多个第二发光开口的面积之和，与所述多个第一发光开口的面积之和的比值满足下列公式2：
    所述公式2中，SG表示所述多个第二发光开口的面积之和占所述显示面板的显示区的面积比例；SR表示所述多个第一发光开口的面积之和占所述显示面板的显示区的面积比例；EG表示所述第二颜色发光器件的电流密度为10mA/cm2时的电流效率；ER表示所述第一颜色发光器件的电流密度为10mA/cm2时的电流效率；ROG表示所述第二颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述第二颜色发光器件的电流效率下降的比例；ROR表示所述第一颜色发光器件的电流密度从10mA/cm2增加到20mA/cm2时，所述第一颜色发光器件的电流效率下降的比例；klim表示在第二工况下所述第二颜色发光器件的工作电流与所述第一颜色发光器件的工作电流之间的比值的最大值；
    所述第二工况为：所述显示面板的工作亮度大于或者等于100nit且小于或者等于800nit，且显示面板发出的白色光线在色坐标内的横坐标值大于或者等于0.30且小于或者等于0.33、纵坐标值大于或者等于0.31且小于或者等于0.34的工况。
  20. 一种显示装置，包括：
    电路板；
    如权利要求1～19中任一项所述的显示面板，所述显示面板位于所述电路板的一侧，且所述显示面板与所述电路板耦接。
PCT/CN2023/096042 2023-05-24 2023-05-24 显示面板及显示装置 Ceased WO2024239275A1 (zh)

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Citations (4)

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US20150249115A1 (en) * 2013-03-29 2015-09-03 Boe Technology Group Co., Ltd. Organic electroluminescence array substrate, manufacturing method thereof and display device
CN110854165A (zh) * 2019-10-28 2020-02-28 深圳市华星光电技术有限公司 一种oled显示面板及oled显示装置
CN113659093A (zh) * 2021-08-20 2021-11-16 京东方科技集团股份有限公司 一种显示面板及其制作方法
CN114093924A (zh) * 2021-11-25 2022-02-25 京东方科技集团股份有限公司 显示基板及其制作方法、显示装置

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US20150249115A1 (en) * 2013-03-29 2015-09-03 Boe Technology Group Co., Ltd. Organic electroluminescence array substrate, manufacturing method thereof and display device
CN110854165A (zh) * 2019-10-28 2020-02-28 深圳市华星光电技术有限公司 一种oled显示面板及oled显示装置
CN113659093A (zh) * 2021-08-20 2021-11-16 京东方科技集团股份有限公司 一种显示面板及其制作方法
CN114093924A (zh) * 2021-11-25 2022-02-25 京东方科技集团股份有限公司 显示基板及其制作方法、显示装置

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