WO2026020366A1 - 显示装置 - Google Patents

显示装置

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Publication number
WO2026020366A1
WO2026020366A1 PCT/CN2024/107277 CN2024107277W WO2026020366A1 WO 2026020366 A1 WO2026020366 A1 WO 2026020366A1 CN 2024107277 W CN2024107277 W CN 2024107277W WO 2026020366 A1 WO2026020366 A1 WO 2026020366A1
Authority
WO
WIPO (PCT)
Prior art keywords
pixel
light
sub
emitting unit
emitting
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.)
Pending
Application number
PCT/CN2024/107277
Other languages
English (en)
French (fr)
Other versions
WO2026020366A9 (zh
Inventor
吴操
李育豪
申晓斌
黄寅虎
王欢欢
史晓波
童慧
冯兵明
苏冬冬
马思远
张大成
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
Beijing BOE Technology Development Co Ltd
Yunnan Invensight Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Technology Development Co Ltd
Yunnan Invensight 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.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Technology Development Co Ltd, Yunnan Invensight Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202480001432.6A priority Critical patent/CN121730004A/zh
Priority to PCT/CN2024/107277 priority patent/WO2026020366A1/zh
Publication of WO2026020366A1 publication Critical patent/WO2026020366A1/zh
Publication of WO2026020366A9 publication Critical patent/WO2026020366A9/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H10K59/122—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
    • H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths

Definitions

  • Micro-OLED Micro-Organic Light-Emitting Diode
  • silicon-based OLED is a type of microdisplay that has emerged in recent years, with silicon-based OLED being one example.
  • Silicon-based OLEDs not only enable active pixel addressing but also allow for the fabrication of pixel driving circuits and other structures on silicon substrates, which helps reduce system size and achieve weight reduction.
  • Silicon-based OLEDs are fabricated using mature Complementary Metal Oxide Semiconductor (CMOS) integrated circuit technology, offering advantages such as small size, high resolution (Pixels Per Inch, PPI), and high refresh rate. They are widely used in near-eye displays for Virtual Reality (VR) and Augmented Reality (AR).
  • CMOS Complementary Metal Oxide Semiconductor
  • the slope angle of the side of the pixel definition layer corresponding to at least one sub-pixel in the pixel unit is greater than or equal to 30° and less than or equal to 60°, and the slope angle of the side of the pixel definition layer corresponding to at least one sub-pixel in the pixel unit is greater than 60° and less than or equal to 90°.
  • the first slope angle is greater than or equal to 30° and less than or equal to 60°
  • the second slope angle is greater than 60° and less than or equal to 90°.
  • the first slope angle is greater than or equal to 30° and less than or equal to 60°
  • the second slope angle is greater than 60° and less than or equal to 90°
  • the third slope angle is greater than 60° and less than or equal to 90°.
  • the vertical distance from the lowest point of the first recessed region to the first flat surface is greater than... It is either equal to 4 angstroms or less than or equal to 9 angstroms.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit; the surface of the charge-generating layer away from the substrate forms a first recessed region in the corresponding region of the side of the pixel definition layer, the end of the first recessed region near the middle region of the sub-pixel is connected to a first flat surface, the first flat surface is parallel to the substrate, the end of the first recessed region away from the middle region of the sub-pixel is connected to a first protrusion, and the slope angle of the side of the first recessed region away from the first flat surface is greater than 60° and less than or equal to 90°.
  • the vertical distance from the lowest point of the first recessed region to the first flat surface is greater than 9 angstroms and less than or equal to 14 angstroms.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the first light-emitting unit includes a first light-emitting layer, and the surface of the first light-emitting layer away from the substrate forms a second recessed region in the corresponding region of the side of the pixel definition layer, the end of the second recessed region near the middle region of the sub-pixel is connected to a second flat surface, the second flat surface is parallel to the substrate, the end of the second recessed region away from the middle region of the sub-pixel is connected to a second protrusion, and the slope angle of the side of the second recessed region away from the second flat surface is greater than or equal to 30° and less than or equal to 60°.
  • the vertical distance from the lowest point of the second recessed region to the second flat surface is greater than or equal to 30 angstroms and less than or equal to 80 angstroms.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the first light-emitting unit includes a first light-emitting layer, and the surface of the first light-emitting layer away from the substrate forms a second recessed region in the corresponding region of the side of the pixel definition layer, the end of the second recessed region near the middle region of the sub-pixel is connected to a second flat surface, the second flat surface is parallel to the substrate, the end of the second recessed region away from the middle region of the sub-pixel is connected to a second protrusion, and the slope angle of the side of the second recessed region away from the second flat surface is greater than 60° and less than or equal to 90°.
  • the vertical distance from the lowest point of the second recessed region to the second flat surface is greater than... 80 angstroms is less than or equal to 120 angstroms.
  • the minimum distance from the lowest point of the second recessed region to the edge of the second flat surface is greater than or equal to 100 angstroms and less than or equal to 300 angstroms.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the second light-emitting unit includes a second light-emitting layer, and the surface of the second light-emitting layer away from the substrate forms a third recessed region in the corresponding region of the side of the pixel definition layer, the end of the third recessed region near the middle region of the sub-pixel is connected to a third flat surface, the third flat surface is parallel to the substrate, the end of the third recessed region away from the middle region of the sub-pixel is connected to a third protrusion, and the slope angle of the side of the third recessed region away from the third flat surface is greater than or equal to 30° and less than or equal to 60°.
  • the vertical distance from the lowest point of the third recessed region to the third flat surface is greater than or equal to 60 angstroms and less than or equal to 70 angstroms.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the second light-emitting unit includes a second light-emitting layer, and the surface of the second light-emitting layer away from the substrate forms a third recessed region in the corresponding region of the side of the pixel definition layer, the end of the third recessed region near the middle region of the sub-pixel is connected to a third flat surface, the third flat surface is parallel to the substrate, the end of the third recessed region away from the middle region of the sub-pixel is connected to a third protrusion, and the slope angle of the side of the third recessed region away from the third flat surface is greater than 60° and less than or equal to 90°.
  • the vertical distance from the lowest point of the third recessed region to the third flat surface is greater than 70 angstroms and less than or equal to 80 angstroms.
  • the minimum distance from the lowest point of the third recessed region to the edge of the third flat surface is less than 100 angstroms.
  • the pixel definition layer includes a first definition layer, a second definition layer, and a third definition layer stacked sequentially along a direction away from the substrate.
  • the first definition layer has a first side surface near the pixel opening
  • the second definition layer has a second side surface near the pixel opening
  • the third definition layer has a second side surface near the pixel opening.
  • the third side of the opening, the first side is connected to the first electrode, the first side extends relative to the second side and the third side respectively
  • the side of the pixel definition layer includes the first side, the second side and the third side, the angle formed between the first side and the plane where the substrate is located forms the slope angle of the side of the pixel definition layer.
  • the third side extends relative to the second side, and the third side and the second side form an undercut structure, with at least a portion of the film layer in the light-emitting functional layer being separated at the undercut structure.
  • the first electrode includes a first conductive layer, a second conductive layer, and a third conductive layer stacked sequentially along a direction perpendicular to the substrate.
  • the first electrode further includes an electrode insulating layer disposed between the second conductive layer and the third conductive layer, wherein a via is provided in the electrode insulating layer, and the third conductive layer is connected to the second conductive layer through the via.
  • the pixel unit includes a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light.
  • the vertical distance from the first electrode of the third sub-pixel away from the substrate side surface to the substrate surface is greater than the vertical distance from the first electrode of the first sub-pixel away from the substrate side surface to the substrate surface.
  • the vertical distance from the first electrode of the first sub-pixel away from the substrate side surface to the substrate surface is greater than the vertical distance from the first electrode of the second sub-pixel away from the substrate side surface to the substrate surface.
  • the light-emitting functional layers in the first sub-pixel, the second sub-pixel, and the third sub-pixel each include a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the color of the light emitted by the first light-emitting unit includes the first color and the second color
  • the color of the light emitted by the second light-emitting unit includes the third color
  • the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the first sub-pixel
  • the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the second sub-pixel;
  • the light-emitting functional layers in the first sub-pixel, the second sub-pixel, and the third sub-pixel each include a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit; the color of the light emitted by the first light-emitting unit includes the third color, the color of the light emitted by the second light-emitting unit includes the first color and the second color, and the slope angle of the side of the pixel definition layer corresponding to the first sub-pixel is greater than that of the pixel definition layer corresponding to the third sub-pixel.
  • the slope angle of the side of the pixel definition layer wherein the slope angle of the side of the pixel definition layer corresponding to the second sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel.
  • the thickness of the electrode insulating layer of the first electrode of the third sub-pixel is greater than the thickness of the electrode insulating layer of the first electrode of the first sub-pixel, and the thickness of the electrode insulating layer of the first electrode of the first sub-pixel is greater than the thickness of the electrode insulating layer of the first electrode of the second sub-pixel.
  • the pixel definition layer is provided with a partition slot located between adjacent pixel openings.
  • Figure 1 is a schematic diagram of the structure of a display device
  • Figure 2 is a schematic diagram of the planar structure of a display device
  • Figure 3 is a schematic diagram of the planar structure of the display area in a display device
  • Figure 4 is a schematic cross-sectional view of the display area of a display device
  • Figure 5 is a schematic diagram of the planar structure of the display device according to an embodiment of the present disclosure.
  • Figure 6 is a cross-sectional structural diagram of the edge region of a sub-pixel in a pixel unit of a display device according to an embodiment of the present disclosure
  • Figure 7 is a cross-sectional schematic diagram of the pixel definition layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure
  • Figure 8 is a schematic cross-sectional view of the first light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 9 is a schematic cross-sectional view of the charge generation layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 10 is a schematic cross-sectional view of the second light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 11 is a schematic cross-sectional view of the edge region of another sub-pixel in the pixel unit of the display device according to an embodiment of the present disclosure
  • Figure 12 is a schematic cross-sectional view of the pixel definition layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 13 is a schematic cross-sectional view of the first light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 14 is a schematic cross-sectional view of the charge generation layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 15 is a schematic cross-sectional view of the second light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 16 is a graph showing the slope angle of the side of the pixel definition layer and the thickness of the first light-emitting layer in the display device of the present disclosure embodiment
  • Figure 17 is a graph showing the slope angle of the side of the pixel definition layer and the depth of the first recessed region of the charge generation layer in the display device of the present disclosure embodiment.
  • Figure 18 is a graph showing the slope angle of the side of the pixel definition layer and the width of the third recessed area of the second light-emitting layer in the display device of the present disclosure embodiment
  • Figure 19 is a schematic cross-sectional view of the first electrode in the display device according to an embodiment of the present disclosure.
  • Figure 20 is a cross-sectional structural diagram of the pixel definition layer in the display device according to an embodiment of the present disclosure.
  • connection should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.
  • the first electrode can be the drain electrode and the second electrode can be the source electrode, or vice versa.
  • the functions of the "source electrode” and “drain electrode” may sometimes be interchanged. Therefore, in this specification, the “source electrode” and “drain electrode” can be interchanged, and the “source terminal” and “drain terminal” can be interchanged.
  • film and “layer” may be interchanged.
  • conductive layer may sometimes be replaced with “conductive film.”
  • insulating film may sometimes be replaced with “insulating layer.”
  • triangles, rectangles, trapezoids, pentagons, or hexagons are not strictly defined but can be approximations.
  • Triangles, rectangles, trapezoids, pentagons, or hexagons, etc. may have some minor deformations due to tolerances, and may have chamfered corners, curved edges, and other deformations.
  • Silicon-based OLED displays use integrated circuits to control the OLED light-emitting devices, which significantly increases the resolution of the display (typically reaching over 3000 ppi). However, this also presents a significant challenge to OLED displays: traditional fine metal masks (FMMs) can only achieve a maximum of around 800 ppi. This means that silicon-based OLED displays cannot easily use a side-by-side (SBS) method for depositing the light-emitting layer and other organic layers. Full-area OLED deposition has become almost inevitable in the field of silicon-based OLED displays, requiring the use of other methods to separate OLED pixels.
  • SBS side-by-side
  • silicon-based OLED displays cannot be manufactured with separate RGB monochrome SBS devices like those in mobile phones, they can only use white light devices.
  • Some silicon-based OLED displays use a single-emitting-layer structure to achieve white light emission.
  • the light-emitting device architecture uses a combination of different light-emitting materials to achieve white light, and the module brightness is generally between 80 nits and 600 nits, which is considered a low-to-medium brightness display. If this single-layer structure were used to achieve high brightness (greater than 1000 nits), power consumption and lifespan would be sacrificed, but the production bottleneck for this type of device is relatively low.
  • tandem OLED devices with at least two light-emitting layers have been introduced. By using a so-called charge generation layer (CGL) to connect two light-emitting units in series, the light emission is superimposed on the device, which successfully improves important optoelectronic properties such as current efficiency, output brightness, and operating lifespan.
  • CGL charge generation layer
  • the pixel definition layer is provided with a pixel opening that defines a sub-pixel, and the stacked light-emitting functional layer including at least two light-emitting layers covers the side of the pixel definition layer near the pixel opening.
  • the slope angle of the side of the pixel definition layer will affect the morphology of the two light-emitting layers corresponding to the side of the pixel definition layer, which can easily lead to distortion of the morphology of the light-emitting layers and cause low grayscale light leakage in the display device.
  • This disclosure provides a display device, including: at least one pixel unit disposed on a substrate, the pixel unit including at least two sub-pixels, the at least two sub-pixels including a first electrode, a light-emitting functional layer and a second electrode sequentially stacked along a direction away from the substrate;
  • the display device includes a pixel definition layer disposed on the side of the first electrode away from the substrate.
  • the pixel definition layer has a pixel opening that defines the sub-pixel.
  • the pixel opening exposes at least a portion of the corresponding first electrode.
  • the light-emitting functional layer covers the pixel opening and is connected to the exposed first electrode.
  • the pixel definition layer has a side surface near the pixel opening and connected to the first electrode, the light-emitting function...
  • the energy layer at least partially covers the side surface of the pixel definition layer, and the slope angles of the side surface of the pixel definition layer corresponding to the at least two sub-pixels are different from each other.
  • the display device of this disclosure controls the morphology of the light-emitting functional layer corresponding to the side of the pixel definition layer with different slope angles for different sub-pixels, thereby reducing the distortion of the morphology of the light-emitting layer emitting light of the same color as the sub-pixel, avoiding low grayscale light leakage, and improving the consistency of high and low grayscale of the display device.
  • Figure 1 is a schematic diagram of a display device.
  • the display device may include: a timing controller, a data driver, a scan driver, a light-emitting driver, and a pixel array.
  • the timing controller is connected to the data driver, the scan driver, and the light-emitting driver.
  • the data driver is connected to multiple data signal lines (e.g., D1 to Dn)
  • the scan driver is connected to multiple scan signal lines (e.g., S1 to Sm)
  • the light-emitting driver is connected to multiple light-emitting control lines (e.g., E1 to Eo).
  • n, m, and o can be natural numbers.
  • the pixel array may include at least two sub-pixels Pxij, where i and j can be natural numbers. At least one sub-pixel Pxij may include: a pixel circuit and a light-emitting device connected to the pixel circuit. The pixel circuit may be connected to the scan signal lines, the light-emitting control lines, and the data signal lines, respectively.
  • the timing controller can provide grayscale values and control signals suitable for the specifications of the data driver to the data driver, clock signals, scan start signals, etc. suitable for the specifications of the scan driver to the scan driver, and clock signals, transmit stop signals, etc. suitable for the specifications of the light-emitting driver to the light-emitting driver.
  • the data driver can use the grayscale values and control signals received from the timing controller to generate data voltages to be provided to the data signal lines D1, D2, D3, ..., Dn.
  • the data driver can sample the grayscale values using a clock signal and apply the data voltage corresponding to the grayscale values to the data signal lines D1 to Dn on a pixel-by-pixel basis.
  • the scan driver can generate scan signals to be provided to the scan signal lines S1, S2, S3, ..., Sm by receiving clock signals, scan start signals, etc. from the timing controller.
  • the scan driver can sequentially provide scan signals with on-level pulses to the scan signal lines S1 to Sm.
  • a scan driver can be configured as a shift register and can generate scan signals by sequentially transmitting scan start signals, provided in the form of on-level pulses, to the next stage circuit under the control of a clock signal.
  • An LED driver can generate LED control signals to be provided to LED control lines E1, E2, E3, ..., Eo by receiving clock signals, transmit stop signals, etc., from a timing controller.
  • an LED driver can sequentially provide transmit signals with off-level pulses to LED control lines E1 to Eo.
  • an LED driver can be configured as a shift register and can generate LED control signals by sequentially transmitting transmit stop signals, provided in the form of off-level pulses, to the next stage circuit under the control of a clock signal.
  • Figure 2 is a schematic diagram of a planar structure of a display device.
  • the display device may include a display area 100 and a dummy area 300 located outside the display area 100, parallel to the plane of the display device.
  • the display area 100 is the effective area (AA) for image display, and may include at least two sub-pixels forming a pixel array.
  • the sub-pixels may include pixel driving circuitry and display light-emitting devices, and the at least two sub-pixels are configured to display dynamic or still images.
  • the dummy area 300 is located outside the display area 100 and may include multiple dummy light-emitting devices. The multiple dummy light-emitting devices are configured to present the shape of the display light-emitting devices but do not display images.
  • the display device may further include a transition region 200, which may be located between the display region 100 and the dummy region 300, i.e., the transition region 200 is located on the periphery of the display region 100, and the dummy region 300 is located on the periphery of the transition region 200.
  • the transition region 200 may include a plurality of transition light-emitting devices, which are configured to present the shape of the display light-emitting device but do not display an image.
  • the dummy region 300 may include corresponding signal lines configured to transmit the required signals to the display area.
  • the transition region 200 may include corresponding sensors configured to sense parameters such as temperature and brightness, which are not limited herein.
  • Figure 3 is a schematic diagram of the planar structure of a display area in a display device.
  • the display area may include multiple pixel units P arranged in a matrix. At least one of the multiple pixel units P includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light.
  • Each of the first sub-pixel P1, second sub-pixel P2, and third sub-pixel P3 includes a pixel driving circuit and a light-emitting device.
  • the pixel driving circuit in the sub-pixel is connected to a scan signal line and a data signal line, respectively.
  • the pixel driving circuit is configured to receive the data voltage transmitted by the data signal line under the control of the scan signal line and output a corresponding current to the display light-emitting device.
  • the display light-emitting device in the sub-pixel is connected to the pixel driving circuit of its respective sub-pixel.
  • the display light-emitting device is configured to emit light of a corresponding brightness in response to the current output by the pixel driving circuit of its respective sub-pixel.
  • the first sub-pixel P1 can be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 can be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light.
  • the shape of the sub-pixels can be any one or more of triangles, squares, rectangles, rhombuses, trapezoids, parallelograms, pentagons, hexagons, and other polygons, and they can be arranged in horizontal parallel, vertical parallel, X-shaped, cross-shaped, triangular, square, diamond-shaped, or delta-shaped arrangements, etc., without limitation herein.
  • a pixel unit may include four sub-pixels, which is not limited herein.
  • Figure 4 is a schematic cross-sectional view of the display area of a display device, wherein Figure 4 can be a cross-sectional view along the A-A' direction in Figure 3.
  • the display device shown in Figure 4 is a structure that achieves full color using a white light + color filter method.
  • the display device may include: a substrate 101, a driving circuit layer 102 disposed on the substrate 101, a light-emitting structure layer 103 disposed on the side of the driving circuit layer 102 away from the substrate 101, a first encapsulation layer 104 disposed on the side of the light-emitting structure layer 103 away from the substrate 101, a color filter structure layer 105 disposed on the side of the first encapsulation layer 104 away from the substrate 101, a second encapsulation layer 106 disposed on the side of the color filter structure layer 105 away from the substrate 101, and a cover plate layer 107 disposed on the side of the second encapsulation layer 106 away from the substrate 101.
  • the display device may include other film layers, such as touch film layers, etc., which are not limited herein.
  • the substrate 101 can be a bulk substrate or a silicon-on-insulator (SOI) substrate.
  • the driving circuit layer 102 can be fabricated on the substrate 101 using silicon semiconductor processes (e.g., CMOS processes).
  • the driving circuit layer 102 can include multiple circuit units, each of which can include at least a pixel driving circuit.
  • the pixel driving circuit is connected to scan signal lines and data signal lines, respectively.
  • the pixel driving circuit can include multiple transistors and storage capacitors; only one transistor is shown as an example in Figure 4.
  • the transistor can include a control electrode G, a first electrode S, and a second electrode D.
  • the control electrode G, the first electrode S, and the second electrode D can be connected to corresponding connection electrodes via tungsten-filled vias (i.e., tungsten vias, W-vias), and can be connected to other electrical structures (such as traces) via the connection electrodes.
  • tungsten-filled vias i.e., tungsten vias, W-vias
  • other electrical structures such as traces
  • the light-emitting structure layer 103 may include multiple light-emitting devices.
  • Each light-emitting device may include at least a first electrode, a light-emitting functional layer, and a second electrode.
  • the first electrode is connected to the second electrode D of a transistor via a connecting electrode.
  • the light-emitting functional layer is connected to the first electrode, and the second electrode is connected to the light-emitting functional layer and a voltage line.
  • the light-emitting functional layer emits light under the drive of the first and second electrodes.
  • the light-emitting functional layer may include at least one light-emitting unit.
  • the at least one light-emitting unit may include a light-emitting layer (EML) and any one or more of the following: a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL).
  • EML light-emitting layer
  • HIL hole injection layer
  • HTL hole transport layer
  • EBL electron blocking layer
  • HBL hole blocking layer
  • HBL hole blocking layer
  • HBL hole blocking layer
  • ETL electron transport layer
  • EIL electron injection layer
  • EIL electron injection layer
  • the light-emitting device can be a tandem light-emitting device that emits white light.
  • the light-emitting functional layer of the tandem light-emitting device includes at least two light-emitting units stacked and connected in series along the direction perpendicular to the substrate.
  • a charge generation layer is provided between two adjacent light-emitting units. The charge generation layer generates holes and electrons under the voltage of the first electrode and the second electrode.
  • the first encapsulation layer 104 and the second encapsulation layer 106 can be encapsulated using a thin film encapsulation (TFE) method, which can ensure that external moisture cannot enter the light-emitting structure layer.
  • TFE thin film encapsulation
  • the cover layer 107 can be made of glass, or a flexible plastic such as colorless polyimide.
  • the color filter structure layer 105 may include a black matrix (BM) and a color filter (CF).
  • the position of the color filter may correspond to the position of the light-emitting device.
  • the black matrix may be located between adjacent color filters.
  • the color filters are configured to filter the white light emitted by the light-emitting device into red (R) light, green (G) light, and blue (B) light, forming red sub-pixels, green sub-pixels, and blue sub-pixels.
  • Figure 5 is a schematic diagram of the planar structure of the display device according to an embodiment of the present disclosure.
  • the display device according to an embodiment of the present disclosure may include a plurality of pixel units P arranged in a matrix on a substrate. At least one of the plurality of pixel units P includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, a third sub-pixel P3 emitting a third color light, and a non-sub-pixel area 10 located between adjacent sub-pixels.
  • the first sub-pixel P1 may be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 may be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 may be a blue sub-pixel emitting blue (B) light.
  • the first sub-pixel P1, the third sub-pixel P3, and the second sub-pixel P2 are arranged at intervals along a first direction D1.
  • the orthographic projections of the first sub-pixel P1, the third sub-pixel P3, and the second sub-pixel P2 on the substrate are all hexagonal.
  • the shape of the sub-pixels can be any one or more of triangles, squares, rectangles, rhombuses, trapezoids, parallelograms, pentagons and other polygons, and can be arranged in a vertical parallel, X-shaped, cross-shaped, triangular, square, diamond-shaped or delta-shaped manner, etc., which are not limited in this disclosure.
  • the display device of this disclosure further includes a pixel definition layer.
  • the pixel definition layer is provided with at least two pixel openings, each corresponding to at least two sub-pixels. Each pixel opening defines a corresponding sub-pixel, and the area defined by the pixel opening is the area of the corresponding sub-pixel.
  • the pixel definition layer includes a first pixel opening 1-1, a second pixel opening 1-2, and a third pixel opening 1-3.
  • the first pixel opening 1-1 defines a first sub-pixel P1
  • the second pixel opening 1-2 defines a second sub-pixel P2
  • the third pixel opening 1-3 defines a third sub-pixel P3.
  • each sub-pixel in the pixel unit is a stacked device with dual light-emitting layers.
  • the pixel unit includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light.
  • the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 are all stacked devices with a yellow light-emitting layer (Y layer) and a blue light-emitting layer (B layer).
  • the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 each include a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked along a direction away from the substrate.
  • the light-emitting functional layer includes a first electrode, a light-emitting functional layer, and a second electrode stacked sequentially along a direction away from the substrate.
  • a first light-emitting unit and a second light-emitting unit are stacked sequentially in the substrate direction, and a charge-generating layer is disposed between the first light-emitting unit and the second light-emitting unit.
  • the color of the light emitted by the first light-emitting unit of the light-emitting functional layer of each sub-pixel includes a first color light and a second color light, i.e., yellow light, and the color of the light emitted by the second light-emitting unit of the light-emitting functional layer of each sub-pixel includes a third color light, i.e., blue light.
  • the pixel unit includes a first sub-pixel group and a second sub-pixel group.
  • the first sub-pixel group may include a first sub-pixel P1 and a second sub-pixel P2, and the second sub-pixel group may include a third sub-pixel P3.
  • the side surface of the pixel definition layer corresponding to the first sub-pixel P1 and the second sub-pixel P2 of the first sub-pixel group has a first slope angle
  • the side surface of the pixel definition layer corresponding to the third sub-pixel P3 of the second sub-pixel group has a second slope angle, the second slope angle being greater than the first slope angle
  • the difference between the second slope angle and the first slope angle is greater than or equal to 10° and less than or equal to 60°.
  • the first slope angle is greater than or equal to 30° and less than or equal to 60°
  • the second slope angle is greater than 60° and less than or equal to 90°.
  • the pixel unit includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light.
  • the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 are all stacked devices with a blue light-emitting layer (B layer) and a yellow light-emitting layer (Y layer).
  • B layer blue light-emitting layer
  • Y layer yellow light-emitting layer
  • each of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked along a direction away from the substrate.
  • the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit sequentially stacked along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit.
  • the color of the light emitted by the first light-emitting unit of each sub-pixel's light-emitting functional layer includes the third color light, i.e., blue light
  • the color of the light emitted by the second light-emitting unit of each sub-pixel's light-emitting functional layer includes both the first color light and the second color light, i.e., yellow light.
  • the pixel unit includes a first sub-pixel group and a second sub-pixel group.
  • the first sub-pixel group may include a third sub-pixel P3, and the second sub-pixel group may include a first sub-pixel P1 and a second sub-pixel P2.
  • the side of the pixel definition layer corresponding to the third sub-pixel P3 of the first sub-pixel group has a first slope angle
  • the side of the pixel definition layer corresponding to the first sub-pixel P1 and the second sub-pixel P2 of the second sub-pixel group has a second slope angle, which is greater than the first slope angle.
  • the difference between the second slope angle and the first slope angle is greater than or equal to 10° and less than or equal to 60°.
  • the first slope angle is greater than or equal to 30° and less than or equal to 60°
  • the second slope angle is greater than 60° and less than or equal to 90°.
  • each sub-pixel in the pixel unit is a stacked device with three light-emitting layers.
  • each sub-pixel in the pixel unit includes a first electrode, a light-emitting functional layer, and a second electrode that are sequentially stacked along a direction away from the substrate.
  • Each sub-pixel's light-emitting functional layer includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit stacked sequentially along a direction away from the substrate, and a first charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit, and a second charge-generating layer disposed between the second light-emitting unit and the third light-emitting unit;
  • the pixel unit includes a first sub-pixel group, a second sub-pixel group, and a third sub-pixel group, the first sub-pixel group including at least one sub-pixel, the color of the light emitted by the first light-emitting unit including the color of the light emitted by the sub-pixel of the first sub-pixel group, and the side of the pixel
  • the difference between the third slope angle and the first slope angle is greater than or equal to 10° and less than or equal to 60°, and the difference between the second slope angle and the first slope angle is greater than or equal to 10° and less than or equal to 60°.
  • the first slope angle is greater than or equal to 30° and less than or equal to 60°
  • the second slope angle is greater than 60° and less than or equal to 90°
  • the third slope angle is greater than 60° and less than or equal to 90°.
  • Figure 6 is a cross-sectional view of the edge region of a sub-pixel in a pixel unit of a display device according to an embodiment of the present disclosure.
  • the pixel unit of the display device according to an embodiment of the present disclosure includes at least two sub-pixels 20 and a non-sub-pixel region 10 located between adjacent sub-pixels 20.
  • the sub-pixels 20 of the pixel unit are stacked devices with dual light-emitting layers.
  • a sub-pixel 20 in the pixel unit may include a driving circuit layer 102 disposed on a substrate 101, a first insulating layer 14 disposed on the side of the driving circuit layer 102 away from the substrate 101, a second insulating layer 15 disposed on the side of the first insulating layer 14 away from the substrate 101, and a light-emitting structure layer disposed on the side of the second insulating layer 15 away from the substrate 101.
  • the light-emitting structure layer includes a first electrode 11 disposed on the side of the second insulating layer 15 away from the substrate 101, a light-emitting functional layer 12 disposed on the side of the first electrode 11 away from the substrate 101, and a second electrode 13 disposed on the side of the light-emitting functional layer 12 away from the substrate 101.
  • the first insulating layer 14 includes silicon oxide
  • the second insulating layer 15 includes silicon nitride.
  • the pixel density of the display device in this disclosure is greater than or equal to 2000ppi.
  • the display device of this disclosure further includes a pixel definition layer 21, which is located in the non-sub-pixel region 10.
  • the pixel definition layer 21 is disposed on the side of the first electrode 11 away from the substrate 101.
  • the pixel definition layer 21 is provided with a pixel opening 1 that defines a sub-pixel.
  • the pixel opening 1 exposes at least a portion of the first electrode 11.
  • the light-emitting functional layer 12 covers the pixel opening 1 and contacts the first electrode 11 exposed by the pixel opening 1.
  • the light-emitting functional layer 12 may include a first light-emitting unit 12-1 and a second light-emitting unit 12-2 stacked sequentially along a direction away from the substrate 101, and a charge-generating layer 30 disposed between the first light-emitting unit 12-1 and the second light-emitting unit 12-2.
  • the first light-emitting unit 12-1 is located on the side of the second light-emitting unit 12-2 near the substrate, and is connected in series with the second light-emitting unit 12-2 through the charge generation layer 30.
  • the display device in this embodiment achieves the effect of emitting white light by superimposing the light emitted from the first light-emitting unit 12-1 and the light emitted from the second light-emitting unit 12-2.
  • the first light-emitting unit 12-1 may include a first auxiliary layer 41, a first light-emitting layer 31, and a second auxiliary layer 42 stacked sequentially along a direction away from the substrate 101.
  • the first auxiliary layer 41 may include any one or more of the following: a first hole injection layer (HIL) and a first hole transport layer (HTL).
  • the second auxiliary layer 42 may include any one or more of the following: a first electron transport layer (ETL), a first electron injection layer (EIL), and a first hole blocking layer (HBL).
  • the second light-emitting unit 12-2 may include a third auxiliary layer 43, a second light-emitting layer 32, and a fourth auxiliary layer 44 stacked sequentially along a direction away from the substrate 101.
  • the third auxiliary layer 43 may include any one or more of the following: a second hole injection layer (HIL) and a second hole transport layer (HTL).
  • the fourth auxiliary layer 44 may include any one or more of the following: a second electron transport layer (ETL), a second electron injection layer (EIL), and a second hole blocking layer (HBL).
  • the first electrode 11 may include a first conductive layer 11-1, a second conductive layer 11-2, and a third conductive layer 11-3 stacked sequentially along a direction perpendicular to the substrate.
  • the first conductive layer 11-1 is disposed on the side of the second insulating layer 15 away from the substrate 101;
  • the second conductive layer 11-2 is disposed on the side of the first conductive layer 11-1 away from the substrate 101 and is in contact with the first conductive layer 11-1;
  • the third conductive layer 11-3 is disposed on the side of the second conductive layer 11-2 away from the substrate 101 and covers the side surface of the second conductive layer 11-2 and the surface away from the substrate 101, thus encapsulating the side surface of the second conductive layer 11-2 and the surface away from the substrate 101.
  • the first conductive layer 11-1 and the third conductive layer 11-3 can be a metal compound, such as titanium nitride, and the material of the second conductive layer 11-2 can be a conductive metal, such as aluminum, copper, etc.
  • the material of the second electrode 13 includes a metal oxide, such as indium zinc oxide; or the material of the second electrode 13 includes an alloy, such as a magnesium silver alloy.
  • the pixel definition layer 21 has a side surface near the pixel opening 1, and at least a portion of the film layer in the light-emitting functional layer 12 covers the side surface of the pixel definition layer 21, forming a recessed region in the area corresponding to the side surface of the pixel definition layer 21.
  • the first light-emitting layer 31, the second light-emitting layer 32, and the charge-generating layer 30 in the light-emitting functional layer 12 form a recessed region in the area corresponding to the side surface of the pixel definition layer 21.
  • Figure 7 is a cross-sectional schematic diagram of the pixel definition layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 7 illustrates the structure of the pixel definition layer in the sub-pixel edge region of the display device shown in Figure 6.
  • the pixel definition layer 21 in a direction perpendicular to the display device, includes a first definition layer 21-1, a second definition layer 21-2, and a third definition layer 21-3 stacked sequentially along a direction away from the substrate. At least a portion of the first definition layer 21-1 covers the edge region of the surface of the first electrode 11 away from the substrate, as well as the side surface of the first electrode 11.
  • the first definition layer 21-1 has a first side surface 51 near the pixel opening 1
  • the second definition layer 21-2 has a second side surface 52 near the pixel opening
  • the third definition layer 21-3 has a third side surface 53 near the pixel opening.
  • At least a portion of the film layer of the light-emitting functional layer 12 covers the first side 51 of the first defining layer 21-1.
  • the first light-emitting layer, the charge-generating layer, and the second light-emitting layer of the light-emitting functional layer 12 cover the first side 51 of the first defining layer 21-1.
  • the first side surface 51 is connected to the surface of the first electrode 11 away from the substrate.
  • the first side surface 51 extends relative to the second side surface 52 and the third side surface 53, respectively.
  • the first side surface 51 has a first slope angle ⁇ 1, which is greater than or equal to 30° and less than or equal to 60°.
  • the first slope angle ⁇ 1 is greater than or equal to 45° and less than or equal to 50°.
  • the first slope angle ⁇ 1 is the angle formed between the extension line of the first side surface 51 and the plane containing the substrate.
  • the second side 52 is recessed relative to the first side 51 and the third side 53, respectively, forming a groove recessed along the direction parallel to the base.
  • the third side 53 extends beyond the second side 52, forming an undercut structure.
  • This undercut structure can isolate a portion of the film layer of the light-emitting functional layer 12 above it.
  • the first light-emitting layer 31 and the charge-generating layer 30 in the light-emitting functional layer 21 are isolated at this undercut structure, thereby preventing charge crosstalk between adjacent sub-pixels and avoiding... No pixel color mixing.
  • Figure 8 is a cross-sectional schematic diagram of the first light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 8 illustrates the structure of the first light-emitting layer in the sub-pixel edge region of the display device shown in Figure 6.
  • a second recessed region 31-3 is formed on the surface of the first light-emitting layer 31 away from the substrate in the region corresponding to the first side of the pixel definition layer.
  • a second flat surface 31-1 is connected to one end of the second recessed region 31-3 near the middle region of the sub-pixel.
  • the second flat surface 31-1 is parallel to the substrate.
  • a second protrusion 31-2 is connected to one end of the second recessed region 31-3 away from the middle region of the sub-pixel.
  • the bottom of the second recessed region 31-3 is arc-shaped.
  • the slope angle b1 of the side of the second recessed region 31-3 away from the second flat surface 31-1 is greater than or equal to 30° and less than or equal to 60°.
  • the slope angle b1 of the side of the second recessed region 31-3 away from the second flat surface 31-1 is greater than or equal to 45° and less than or equal to 55°.
  • the vertical distance H1 from the lowest point of the second recessed region 31-3 to the second flat surface 31-1 is greater than or equal to 30 angstroms and less than or equal to 80 angstroms.
  • the vertical distance H1 from the lowest point of the second recessed region 31-3 to the highest point of the second flat surface 31-1 is greater than or equal to 50 angstroms and less than or equal to 70 angstroms.
  • the minimum distance L1 from the lowest point of the second recessed region 31-3 to the edge of the second flat surface 31-1 is greater than or equal to 30 angstroms and less than or equal to 100 angstroms.
  • the minimum distance L1 from the lowest point of the second recessed region 31-3 to the edge of the second flat surface 31-1 is greater than or equal to 50 angstroms and less than or equal to 80 angstroms.
  • the display device of this disclosure controls the first slope angle a1 of the first side of the pixel definition layer to be greater than or equal to 30° and less than or equal to 60°, thereby reducing the distortion of the morphology of the second recessed region 31-3 of the first light-emitting layer, avoiding low grayscale light leakage of the display device, and improving the consistency of high and low grayscale of the display device.
  • Figure 9 is a cross-sectional schematic diagram of the charge generation layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 9 illustrates the structure of the charge generation layer in the sub-pixel edge region of the display device shown in Figure 6.
  • the surface of the charge generation layer 30 away from the substrate forms a first recessed region 30-3 in the region corresponding to the first side of the pixel definition layer.
  • One end of the first recessed region 30-3 near the middle region of the sub-pixel is connected to a first flat surface 30-1, which is parallel to the substrate.
  • One end of the first recessed region 30-3 away from the middle region of the sub-pixel is connected to a first protrusion 30-2.
  • the bottom of the first recessed region 30-3 is arc-shaped, and the slope angle b2 of the side of the first recessed region 30-3 away from the first flat surface 30-1 is greater than or equal to 30° and less than or equal to 60°.
  • the slope angle b2 of the side of the first recessed region 30-3 away from the first flat surface 30-1 is greater than or equal to 45° and less than or equal to 55°.
  • the lowest point of the first recessed region 30-1 is perpendicular to the first flat surface 30-1.
  • the straight distance H2 is greater than or equal to 4 angstroms and less than or equal to 9 angstroms.
  • the display device in this embodiment controls the first slope angle ⁇ 1 of the first side of the pixel definition layer corresponding to the sub-pixel to be greater than or equal to 30° and less than or equal to 60°, thereby preventing the charge generation layer from forming punctures on the side of the pixel definition layer, reducing the accumulation of charge carriers in the charge generation layer, and improving the service life of the display device.
  • the slope angle b3 of the side of the third recessed region 32-3 away from the third flat surface 32-1 is greater than 60° and less than or equal to 90°.
  • the slope angle b3 of the side of the third recessed region 32-3 away from the third flat surface 32-1 is greater than or equal to 75° and less than or equal to 85°.
  • the minimum distance L2 from the lowest point of the third recessed region 32-3 to the edge of the third flat surface 32-1 is less than 100 angstroms.
  • the minimum distance L2 from the lowest point of the third recessed region 32-3 to the edge of the third flat surface 32-1 can be greater than or equal to 30 angstroms and less than or equal to 60 angstroms.
  • the color of the light emitted by the first light-emitting unit 12-1 includes at least the color of the light emitted by the first sub-pixel and the color of the light emitted by the second sub-pixel
  • the color of the light emitted by the second light-emitting unit 12-2 includes at least the color of the light emitted by the third sub-pixel.
  • the first sub-pixel P1 can be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 can be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light
  • the first light-emitting unit 12-1 can emit yellow light
  • the first light-emitting layer 31 of the first light-emitting unit 12-1 can include a stacked green light-emitting layer and a red light-emitting layer, which are stacked on top of each other to achieve the emission of yellow light by the first light-emitting unit 12-1.
  • the second light-emitting unit 12-2 can emit blue light, and the second light-emitting layer 32 of the second light-emitting unit 12-2 can be a blue light-emitting layer to achieve the emission of blue light by the second light-emitting unit 12-2.
  • the first slope angle ⁇ 1 of the first side surface of the pixel definition layer corresponding to the first sub-pixel or the second sub-pixel is controlled to be greater than or equal to 30° and less than or equal to 60°, thereby reducing the first light-emitting layer that emits yellow light.
  • the distortion of the morphology of the second recessed region 31-3 is avoided to prevent light leakage at low gray levels of the first or second sub-pixel, thereby improving the consistency of high and low gray levels in the display device.
  • the color of the light emitted by the first light-emitting unit 12-1 includes at least the color of the light emitted by the third sub-pixel
  • the color of the light emitted by the second light-emitting unit 12-2 includes at least the colors of the light emitted by the first sub-pixel and the second sub-pixel.
  • the first sub-pixel P1 can be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 can be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light
  • the first light-emitting unit 12-1 can emit blue light
  • the first light-emitting layer 31 of the first light-emitting unit 12-1 can be a blue light-emitting layer, thereby realizing the first light-emitting unit 12-1 emitting blue light.
  • the second light-emitting unit 12-2 can emit yellow light
  • the second light-emitting layer 32 of the second light-emitting unit 12-2 can include a stacked green light-emitting layer and a red light-emitting layer, which are stacked on top of each other, thereby realizing the second light-emitting unit 12-2 emitting yellow light.
  • the display device of this disclosure controls the first slope angle a1 of the side of the pixel definition layer corresponding to the third sub-pixel to be greater than or equal to 30° and less than or equal to 60°, thereby reducing the distortion of the morphology of the second recessed region 31-3 of the first light-emitting layer that emits blue light, avoiding low grayscale light leakage of the third sub-pixel, and improving the consistency of high and low grayscale of the display device.
  • Figure 11 is a cross-sectional view of the edge region of another sub-pixel in the pixel unit of the display device according to an embodiment of the present disclosure.
  • the structure of the edge region of another sub-pixel in the pixel unit of the display device according to an embodiment of the present disclosure is generally the same as the structure of the edge region of the sub-pixel shown in Figure 6.
  • the slope angle of the first side of the pixel definition layer 21 corresponding to the sub-pixel is greater than 60° and less than or equal to 90°, and the morphology of the recessed region formed by the film layer in the light-emitting functional layer in the region corresponding to the first side of the pixel definition layer 21 is different from the morphology of the recessed region of the film layer in the light-emitting functional layer shown in Figure 6.
  • Figure 12 is a second schematic cross-sectional view of the pixel definition layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 12 illustrates the structure of the pixel definition layer in the sub-pixel edge region of the display device shown in Figure 11.
  • the pixel definition layer 21 in a direction perpendicular to the display device, includes a first definition layer 21-1, a second definition layer 21-2, and a third definition layer 21-3 stacked sequentially along a direction away from the substrate. At least a portion of the first definition layer 21-1 covers the edge region of the surface of the first electrode 11 away from the substrate, as well as the side surface of the first electrode 11.
  • the first definition layer 21-1 has a first side surface 51' near the pixel opening
  • the second definition layer 21-2 has a second side surface 52' near the pixel opening
  • the third definition layer 21-3 has a third side surface 53' near the pixel opening.
  • At least a portion of the light-emitting functional layer 12 covers the first side 51' of the first defining layer 21-1.
  • the first light-emitting layer, the charge-generating layer, and the second light-emitting layer of the light-emitting functional layer 12 cover the first defining layer.
  • 21-1 First side 51'.
  • the first side surface 51' is connected to the surface of the first electrode 11 away from the substrate at one end near the substrate.
  • the first side surface 51' extends relative to the second side surface 52' and the third side surface 53', respectively.
  • the first side surface 51' of the pixel opening 1 corresponding to the third sub-pixel has a second slope angle ⁇ 2, which is greater than 60° and less than or equal to 90°.
  • the second slope angle ⁇ 2 is greater than or equal to 75° and less than or equal to 85°.
  • the second slope angle ⁇ 2 is the angle formed between the extension line of the first side surface 51' and the plane containing the substrate.
  • the second side 52' is recessed relative to the first side 51' and the third side 53', respectively, forming a groove recessed along the direction parallel to the base.
  • the third side 53' extends relative to the second side 52', forming an undercut structure.
  • This undercut structure can isolate a portion of the film layer of the light-emitting functional layer 12 above it.
  • the first light-emitting layer 31 and the charge-generating layer 30 in the light-emitting functional layer 21 are separated at this undercut structure to prevent charge crosstalk between adjacent sub-pixels and avoid pixel color mixing.
  • Figure 13 is a second cross-sectional schematic diagram of the first light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 13 illustrates the structure of the first light-emitting layer in the sub-pixel edge region of the display device shown in Figure 11.
  • a second recessed region 31-3 is formed on the surface of the first light-emitting layer 31 away from the substrate in the region corresponding to the first side of the pixel definition layer.
  • a second flat surface 31-1 is connected to one end of the second recessed region 31-3 near the middle region of the sub-pixel.
  • the second flat surface 31-1 is parallel to the substrate.
  • a second protrusion 31-2 is connected to one end of the second recessed region 31-3 away from the middle region of the sub-pixel.
  • the bottom of the second recessed region 31-3 is arc-shaped, and the slope angle b1’ of the side of the second recessed region 31-3 away from the second flat surface 31-1 is greater than 60° and less than or equal to 90°.
  • the slope angle b1’ of the side of the second recessed region 31-3 away from the second flat surface 31-1 is greater than or equal to 75° and less than or equal to 85°.
  • the vertical distance H1’ from the lowest point of the second recessed region 31-3 to the second flat surface 31-1 is greater than 80 angstroms and less than or equal to 120 angstroms.
  • the vertical distance H1’ of the second recessed region 31-3 is greater than or equal to 90 angstroms and less than or equal to 110 angstroms.
  • the minimum distance L1’ from the lowest point of the second recessed region 31-3 to the edge of the second flat surface 31-1 is greater than 100 angstroms and less than or equal to 300 angstroms.
  • the minimum distance L1’ from the lowest point of the second recessed region 31-3 to the edge of the second flat surface 31-1 is greater than or equal to 150 angstroms and less than or equal to 250 angstroms.
  • Figure 14 is a schematic cross-sectional view of the charge generation layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure. II.
  • Figure 14 illustrates the structure of the charge generation layer in the sub-pixel edge region of the display device shown in Figure 11.
  • the surface of the charge generation layer 30 away from the substrate forms a first recessed region 30-3 in the region corresponding to the first side of the pixel definition layer.
  • One end of the first recessed region 30-3 near the middle region of the sub-pixel is connected to a first flat surface 30-1, which is parallel to the substrate.
  • One end of the first recessed region 30-3 away from the middle region of the sub-pixel is connected to a first protrusion 30-2.
  • the bottom of the first recessed region 30-3 is angular, and the slope angle b2' of the side of the first recessed region 30-3 away from the first flat surface 30-1 is greater than 60° and less than or equal to 90°.
  • the slope angle b2' of the side of the first recessed region 30-3 away from the first flat surface 30-1 is greater than or equal to 75° and less than or equal to 85°.
  • the vertical distance H2’ between the lowest point of the first recessed region 30-1 and the first flat surface 30-1 is greater than 9 angstroms and less than or equal to 14 angstroms.
  • Figure 15 is a cross-sectional schematic diagram of the second light-emitting layer in the sub-pixel edge region of the display device according to an embodiment of the present disclosure.
  • Figure 15 illustrates the structure of the second light-emitting layer in the sub-pixel edge region of the display device shown in Figure 11.
  • a third recessed region 32-3 is formed on the surface of the second light-emitting layer 32 away from the substrate in the region corresponding to the first side of the pixel definition layer.
  • a third flat surface 32-1 is connected to one end of the third recessed region 32-3 near the middle region of the sub-pixel.
  • the third flat surface 32-1 is parallel to the substrate.
  • a third protrusion 32-2 is connected to one end of the third recessed region 32-3 away from the middle region of the sub-pixel.
  • the slope angle b3’ of the side of the third recessed region 32-3 away from the third flat surface 32-1 is greater than or equal to 30° and less than or equal to 60°.
  • the slope angle b3’ of the side of the third recessed region 32-3 away from the third flat surface 32-1 is greater than or equal to 45° and less than or equal to 55°.
  • the vertical distance H3’ from the lowest point of the third recessed region 32-3 to the third flat surface 32-1 is greater than or equal to 60 angstroms and less than or equal to 70 angstroms.
  • the minimum distance L2’ from the lowest point of the third recessed region 32-3 to the edge of the third flat surface 32-1 is greater than or equal to 100 angstroms and less than or equal to 300 angstroms.
  • the minimum distance L2’ from the lowest point of the third recessed region 32-3 to the edge of the third flat surface 32-1 is greater than or equal to 150 angstroms and less than or equal to 200 angstroms.
  • the display device of this disclosure controls the first slope angle a2 of the side of the pixel definition layer corresponding to the sub-pixel to be greater than 60° and less than or equal to 90°, thereby reducing the distortion of the morphology of the third recessed region 32-3 of the second light-emitting layer, avoiding low grayscale light leakage, and improving the consistency of high and low grayscale of the display device.
  • the color of the light emitted by the first light-emitting unit 12-1 includes at least the color of the light emitted by the third sub-pixel, and the light emitted by the second light-emitting unit 12-2...
  • the color includes at least the color of the light emitted by the first sub-pixel and the color of the light emitted by the second sub-pixel.
  • the first sub-pixel P1 can be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 can be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light
  • the first light-emitting unit 12-1 can emit blue light
  • the first light-emitting layer 31 of the first light-emitting unit 12-1 can be a blue light-emitting layer, so that the first light-emitting unit 12-1 emits blue light.
  • the second light-emitting unit 12-2 can emit yellow light
  • the second light-emitting layer 32 of the second light-emitting unit 12-2 can include a stacked green light-emitting layer and a red light-emitting layer, which are stacked on top of each other, so that the second light-emitting unit 12-2 emits yellow light.
  • the display device of this disclosure controls the second slope angle a2 of the side of the pixel definition layer corresponding to the first sub-pixel or the second sub-pixel to be greater than 60° and less than or equal to 90°, thereby reducing the distortion of the morphology of the third recessed area of the second light-emitting layer that emits yellow light, avoiding low grayscale light leakage of the first sub-pixel or the second sub-pixel, and improving the consistency of high and low grayscale of the display device.
  • the color of the light emitted by the first light-emitting unit 12-1 includes at least the color of the light emitted by the first sub-pixel and the color of the light emitted by the second sub-pixel
  • the color of the light emitted by the second light-emitting unit 12-2 includes at least the color of the light emitted by the third sub-pixel.
  • the first sub-pixel P1 can be a red sub-pixel emitting red (R) light
  • the second sub-pixel P2 can be a green sub-pixel emitting green (G) light
  • the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light
  • the first light-emitting unit 12-1 can emit yellow light
  • the first light-emitting layer 31 of the first light-emitting unit 12-1 can include a stacked green light-emitting layer and a red light-emitting layer, which are stacked on top of each other to achieve the emission of yellow light by the first light-emitting unit 12-1
  • the second light-emitting unit 12-2 can emit blue light
  • the second light-emitting layer 32 of the second light-emitting unit 12-2 can be a blue light-emitting layer to achieve the emission of blue light by the second light-emitting unit 12-2.
  • the display device of this disclosure controls the second slope angle a2 of the side of the pixel definition layer corresponding to the third sub-pixel to be greater than 60° and less than or equal to 90°, thereby reducing the distortion of the morphology of the third recessed area of the second light-emitting layer emitting blue light, avoiding low grayscale light leakage of the third sub-pixel, and improving the consistency of high and low grayscale of the display device.
  • Figure 16 is a graph showing the slope angle of the side of the pixel definition layer and the thickness of the first light-emitting layer in the display device of this embodiment.
  • the slope angle of the side of the pixel definition layer is greater than or equal to 30° and less than or equal to 60°, and the thickness of the first light-emitting layer in the second recessed region is uniform.
  • the slope angle of the side of the pixel definition layer is greater than 60° and less than or equal to 90°, and the thickness of the first light-emitting layer in the second recessed region is uniform.
  • the thickness of the first light-emitting layer is the vertical distance between the surface of the first light-emitting layer away from the substrate and the surface of the first light-emitting layer close to the substrate.
  • Figure 17 is a graph showing the slope angle of the side of the pixel definition layer and the depth of the first recessed region of the charge generation layer in the display device of this embodiment. As shown in Figure 17, a simulation experiment was conducted on the sub-pixels of the display device of this embodiment. The depth of the first recessed region of the charge generation layer increases with the increase of the slope angle of the side of the pixel definition layer. When the slope angle of the side of the pixel definition layer is greater than or equal to 30° and less than or equal to 60°, the depth of the first recessed region of the charge generation layer is greater than or equal to 4 angstroms and less than or equal to 9 angstroms.
  • the depth of the first recessed region of the charge generation layer is greater than 9 angstroms and less than or equal to 14 angstroms.
  • the depth of the first recessed region is the vertical distance from the lowest point of the first recessed region to the first flat surface.
  • Figure 18 is a graph showing the slope angle of the side of the pixel definition layer and the width of the third recessed region of the second light-emitting layer in the display device of this embodiment. As shown in Figure 18, a simulation experiment was conducted on the sub-pixels of the display device of this embodiment. The width of the third recessed region of the second light-emitting layer decreases as the slope angle of the side of the pixel definition layer increases.
  • the width of the third recessed region of the second light-emitting layer is greater than or equal to 100 angstroms and less than or equal to 300 angstroms; when the slope angle of the side of the pixel definition layer is greater than 60° and less than or equal to 90°, the width of the third recessed region of the second light-emitting layer is less than 100 angstroms.
  • the width of the third recessed region is the minimum distance from the lowest point of the third recessed region to the edge of the third flat surface.
  • Figure 19 is a schematic cross-sectional view of the first electrode in the display device according to an embodiment of the present disclosure.
  • the first electrode 11 further includes an electrode insulating layer 11-4 disposed between the second conductive layer 11-2 and the third conductive layer 11-3.
  • the electrode insulating layer 11-4 has a through hole, and the third conductive layer 11-3 is connected to the second conductive layer 11-2 through the through hole.
  • the pixel unit includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light.
  • the vertical distance h3 from the first electrode 11 of the third sub-pixel P3 to the surface of the substrate 101 on the side away from the substrate is greater than the vertical distance h1 from the first electrode 11 of the first sub-pixel P1 to the surface of the substrate 101 on the side away from the substrate 101.
  • the vertical distance h1 from the first electrode 11 of the first sub-pixel P1 to the surface of the substrate 101 on the side away from the substrate 101 is greater than the vertical distance h2 from the first electrode 11 of the second sub-pixel P2 to the surface of the substrate on the side away from the substrate.
  • the light-emitting functional layers in the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 each include a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the color of the light emitted by the first light-emitting unit includes the first color and the second color, for example, yellow light, and the color of the light emitted by the second light-emitting unit...
  • the color of the emitted light includes the third color, for example, blue light.
  • the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the first sub-pixel, and the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the second sub-pixel.
  • the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel is greater than 60° and less than or equal to 90°
  • the slope angle of the side of the pixel definition layer corresponding to the second sub-pixel is greater than or equal to 30° and less than or equal to 60°
  • the slope angle of the side of the pixel definition layer corresponding to the first sub-pixel is greater than or equal to 30° and less than or equal to 60°.
  • the display device of this disclosure emits yellow light through the first light-emitting unit and blue light through the second light-emitting unit, which makes the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel P3 larger, and the vertical distance from the surface of the first electrode 11 of the third sub-pixel P3 away from the substrate to the surface of the substrate 101 larger, thereby reducing the distortion of the light-emitting layer morphology of the second light-emitting unit emitting blue light in the third sub-pixel P3, avoiding low grayscale light leakage of the third sub-pixel P3, and improving the consistency of high and low grayscale of the display device.
  • the display device of this disclosure emits yellow light through a first light-emitting unit and blue light through a second light-emitting unit. This results in a smaller slope angle on the side of the pixel definition layer corresponding to the first sub-pixel P1 and the second sub-pixel P2, and a smaller vertical distance from the surface of the first electrode 11 of the first sub-pixel P1 and the second sub-pixel P2 away from the substrate to the surface of the substrate 101.
  • the light-emitting functional layers in the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 each include a first light-emitting unit and a second light-emitting unit stacked sequentially along a direction away from the substrate, and a charge-generating layer disposed between the first light-emitting unit and the second light-emitting unit;
  • the color of the light emitted by the first light-emitting unit includes a third color, such as blue light;
  • the color of the light emitted by the second light-emitting unit includes the first color and the second color, such as yellow light;
  • the slope angle of the side of the pixel definition layer corresponding to the first sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel; and the slope angle of the side of the pixel definition layer corresponding to the second sub-pixel is greater than the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel.
  • the slope angle of the side surface of the pixel definition layer corresponding to the third sub-pixel is greater than or equal to 30° and less than or equal to 60°
  • the slope angle of the side surface of the pixel definition layer corresponding to the second sub-pixel is greater than 60° and less than or equal to 90°
  • the slope angle of the side surface of the pixel definition layer corresponding to the first sub-pixel is... Angles greater than 60° and less than or equal to 90°.
  • the display device of this disclosure emits blue light through the first light-emitting unit and yellow light through the second light-emitting unit, so that the slope angle of the side of the pixel definition layer corresponding to the third sub-pixel P3 is smaller, and the vertical distance from the surface of the first electrode 11 of the third sub-pixel P3 away from the substrate to the surface of the substrate 101 is larger.
  • the display device of this disclosure emits blue light through a first light-emitting unit and yellow light through a second light-emitting unit. This results in a larger slope angle on the side of the pixel definition layer corresponding to the first sub-pixel P1 and the second sub-pixel P2, and a smaller vertical distance from the surface of the first electrode 11 of the first sub-pixel P1 and the second sub-pixel P2 away from the substrate to the surface of the substrate 101.
  • the thickness of the electrode insulating layer 11-4 of the first electrode 11 of the third sub-pixel P3 is greater than the thickness of the electrode insulating layer 11-4 of the first electrode 11 of the first sub-pixel P1
  • the thickness of the electrode insulating layer 11-4 of the first electrode 11 of the first sub-pixel P1 is greater than the thickness of the electrode insulating layer 11-4 of the first electrode 11 of the second sub-pixel P2.
  • Figure 20 is a cross-sectional structural diagram of the pixel definition layer in the display device according to an embodiment of the present disclosure.
  • a partition groove 22 is provided in the pixel definition layer 21.
  • the partition groove 22 is located in the non-sub-pixel area.
  • At least a portion of the film layer of the light-emitting functional layer covers the bottom wall and side wall of the partition groove 22 to form a recessed area, thereby avoiding crosstalk between adjacent sub-pixels.
  • the display device in this embodiment can be any product or component with display function, such as a mobile phone, wearable device, AR or VR display device, vehicle display device, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.
  • This embodiment of the invention is not limited thereto.
  • This disclosure also provides a method for manufacturing a display device, the display device comprising at least one pixel unit, the pixel unit comprising at least two sub-pixels, the method for manufacturing the display device comprising:
  • a first electrode is formed on the substrate
  • the slope angles of the side surfaces of the pixel definition layer corresponding to at least two sub-pixels are different.

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Abstract

一种显示装置，该显示装置包括设置在基底(101)上的至少一个像素单元，所述像素单元包括至少两个子像素，所述至少两个子像素包括沿着远离所述基底(101)方向依次层叠设置的第一电极(11)、发光功能层(12)以及第二电极(13)；所述显示装置包括像素定义层(21)，所述像素定义层(21)设置在所述第一电极(11)远离所述基底(101)一侧，所述像素定义层(21)设置有限定所述子像素的像素开口(1)；所述像素定义层(21)设置有靠近所述像素开口(1)且与所述第一电极(11)连接的侧面，所述发光功能层(12)的至少部分覆盖所述像素定义层(21)的所述侧面，所述至少两个子像素对应的所述像素定义层(21)的所述侧面的坡度角互不相同。

Description

显示装置 技术领域
本文涉及但不限于显示技术领域，具体涉及一种显示装置。
背景技术
微型有机发光二极管(Micro Organic Light-Emitting Diode，简称Micro-OLED)是近年来发展起来的微型显示器，硅基OLED是其中的一种。硅基OLED不仅可以实现像素的有源寻址，并且可以实现在硅基衬底上制备像素驱动电路等结构，有利于减小系统体积，实现轻量化。硅基OLED采用成熟的互补金属氧化物半导体(Complementary Metal Oxide Semiconductor，简称CMOS)集成电路工艺制备，具有体积小、高分辨率(Pixels Per Inch，简称PPI)、高刷新率等优点，广泛应用在虚拟现实(Virtual Reality，简称VR)或增强现实(Augmented Reality，简称AR)近眼显示领域中。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
一方面，本公开提供了一种显示装置，包括：设置在基底上的至少一个像素单元，所述像素单元包括至少两个子像素，所述至少两个子像素包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极；
所述显示装置包括像素定义层，所述像素定义层设置在所述第一电极远离所述基底一侧，所述像素定义层设置有限定所述子像素的像素开口，所述像素开口暴露对应的所述第一电极的至少部分，所述发光功能层覆盖所述像素开口，与暴露的所述第一电极连接；
所述像素定义层设置有靠近所述像素开口且与所述第一电极连接的侧面，所述发光功能层的至少部分覆盖所述像素定义层的所述侧面，所述至少两个子像素对应的所述像素定义层的所述侧面的坡度角互不相同。
在示例性实施方式中，所述发光功能层在所述像素定义层的所述侧面对应区域形成凹陷区域，坡度角互不相同的所述像素定义层的所述侧面对应的所述凹陷区域侧面的坡度角互不相同。
在示例性实施方式中，所述像素单元中至少一个子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述像素单元中至少一个子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述像素单元包括第一子像素组和第二子像素组，所述第一子像素组包括至少一个子像素，所述第一发光单元出射光线的颜色包括所述第一子像素组的子像素的出射光线的颜色，所述第一子像素组的子像素对应的所述像素定义层的所述侧面具有第一坡度角，所述第二子像素组包括至少一个子像素，所述第二发光单元出射光线的颜色包括所述第二子像素组的子像素的出射光线的颜色，所述第二子像素组的子像素对应的所述像素定义层的所述侧面具有第二坡度角，所述第二坡度角大于所述第一坡度角。
在示例性实施方式中，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
在示例性实施方式中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°。
在示例性实施方式中，所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元、第二发光单元和第三发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的第一电荷产生层，设置在所述第二发光单元和所述第三发光单元之间的第二电荷产生层；所述像素单元包括第一子像素组、第二子像素组和第三子像素组，所述第一子像素组包括至少一个子像素，所述第一发光单元出射光线的颜色包括所述第一子像素组的子像素出射光线的颜色，所述第一子像素组的子像素对应的所述像素定义层的所述侧面具有第一坡度角；所述第二子像素组包括至少一个子像素，所述第二发光单元出射光线的颜色包括所述第二子像素组的子像素出射光线的颜色，所述第二子像素组的子像素对应的所述像素定义层的所述侧面具有第二坡度角；所述第三子像素组包括至少一个子像素，所述第三发光单元出射光线的颜色包括所述第三子像素组的子像素出射光线的颜色，所述第三子像素组的子像素对应的所述像素定义层的所述侧面具有第三坡度角，所述第三坡度角大于所述第一坡度角，所述第二坡度角大于所述第一坡度角。
在示例性实施方式中，所述第三坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60 °。
在示例性实施方式中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°，所述第三坡度角大于60°小于或等于90°。
在示例性实施方式中，所述像素单元包括出射第一颜色光线的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第二发光单元出射光线的颜色包括所述第三颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°。
在示例性实施方式中，所述像素单元包括出射第一颜色光线的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第三颜色，所述第二发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述电荷产生层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第一凹陷区域，所述第一凹陷区域靠近所述子像素中间区域的一端连接有第一平坦面，所述第一平坦面平行于所述基底，所述第一凹陷区域远离所述子像素中间区域的一端连接有第一凸起，所述第一凹陷区域远离所述第一平坦面的侧面的坡度角大于或等于30°小于或等于60°。
在示例性实施方式中，所述第一凹陷区域的最低点至所述第一平坦面的垂直距离大于 或等于4埃小于或等于9埃。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述电荷产生层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第一凹陷区域，所述第一凹陷区域靠近所述子像素中间区域的一端连接有第一平坦面，所述第一平坦面平行于所述基底，所述第一凹陷区域远离所述子像素中间区域的一端连接有第一凸起，所述第一凹陷区域远离所述第一平坦面的侧面的坡度角大于60°小于或等于90°。
在示例性实施方式中，所述第一凹陷区域的最低点至所述第一平坦面的垂直距离大于9埃小于或等于14埃。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元包括第一发光层，所述第一发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第二凹陷区域，所述第二凹陷区域靠近所述子像素中间区域的一端连接有第二平坦面，所述第二平坦面平行于所述基底，所述第二凹陷区域远离所述子像素中间区域的一端连接有第二凸起，所述第二凹陷区域远离所述第二平坦面的侧面的坡度角大于或等于30°小于或等于60°。
在示例性实施方式中，所述第二凹陷区域的最低点至所述第二平坦面的垂直距离大于或等于30埃小于或等于80埃。
在示例性实施方式中，所述第二凹陷区域的最低点至所述第二平坦面边缘的最小距离大于等于大于或等于30埃小于或等于100埃。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元包括第一发光层，所述第一发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第二凹陷区域，所述第二凹陷区域靠近所述子像素中间区域的一端连接有第二平坦面，所述第二平坦面平行于所述基底，所述第二凹陷区域远离所述子像素中间区域的一端连接有第二凸起，所述第二凹陷区域远离所述第二平坦面的侧面的坡度角大于60°小于或等于90°。
在示例性实施方式中，所述第二凹陷区域的最低点至所述第二平坦面的垂直距离大于 80埃小于或等于120埃。
在示例性实施方式中，所述第二凹陷区域的最低点至所述第二平坦面边缘的最小距离大于等于100埃小于或等于300埃。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第二发光单元包括第二发光层，所述第二发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第三凹陷区域，所述第三凹陷区域靠近所述子像素中间区域的一端连接有第三平坦面，所述第三平坦面平行于所述基底，所述第三凹陷区域远离所述子像素中间区域的一端连接有第三凸起，所述第三凹陷区域远离所述第三平坦面的侧面的坡度角大于或等于30°小于或等于60°。
在示例性实施方式中，所述第三凹陷区域的最低点至所述第三平坦面的垂直距离大于或等于60埃小于或等于70埃。
在示例性实施方式中，所述第三凹陷区域的最低点至所述第三平坦面边缘的最小距离大于或等于100埃小于或等于300埃。
在示例性实施方式中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第二发光单元包括第二发光层，所述第二发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第三凹陷区域，所述第三凹陷区域靠近所述子像素中间区域的一端连接有第三平坦面，所述第三平坦面平行于所述基底，所述第三凹陷区域远离所述子像素中间区域的一端连接有第三凸起，所述第三凹陷区域远离所述第三平坦面的侧面的坡度角大于60°小于或等于90°。
在示例性实施方式中，所述第三凹陷区域的最低点至所述第三平坦面的垂直距离大于70埃小于或等于80埃。
在示例性实施方式中，所述第三凹陷区域的最低点至所述第三平坦面边缘的最小距离小于100埃。
在示例性实施方式中，所述像素定义层包括沿着远离所述基底方向依次层叠设置的第一定义层、第二定义层和第三定义层，所述第一定义层具有靠近所述像素开口的第一侧面，所述第二定义层具有靠近所述像素开口的第二侧面，所述第三定义层具有靠近所述像素开 口的第三侧面，所述第一侧面与所述第一电极连接，所述第一侧面分别相较于所述第二侧面和所述第三侧面伸出，所述像素定义层的所述侧面包括所述第一侧面、所述第二侧面和所述第三侧面，所述第一侧面与所述基底所在平面之间形成的夹角形成所述像素定义层的所述侧面的坡度角。
在示例性实施方式中，所述第三侧面相较于所述第二侧面伸出，所述第三侧面与所述第二侧面形成底切结构，所述发光功能层中的至少部分膜层在所述底切结构处隔断。
在示例性实施方式中，所述第一电极包括沿着垂直于所述基底方向依次堆叠的第一导电层、第二导电层和第三导电层。
在示例性实施方式中，所述第一电极还包括设置在所述第二导电层与所述第三导电层之间的电极绝缘层，所述电极绝缘层中设置有过孔，所述第三导电层通过所述过孔与所述第二导电层连接。
在示例性实施方式中，所述像素单元包括出射第一颜色光线的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述第三子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，大于所述第一子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，所述第一子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，大于所述第二子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离。
在示例性实施方式中，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第二发光单元出射光线的颜色包括所述第三颜色，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第一子像素对应的所述像素定义层的所述侧面的坡度角，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第二子像素对应的所述像素定义层的所述侧面的坡度角；
或者，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第三颜色，所述第二发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所 述像素定义层的所述侧面的坡度角，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所述像素定义层的所述侧面的坡度角。
在示例性实施方式中，所述第三子像素的所述第一电极的所述电极绝缘层的厚度，大于所述第一子像素的所述第一电极的所述电极绝缘层的厚度，所述第一子像素的所述第一电极的所述电极绝缘层的厚度，大于所述第二子像素的所述第一电极的所述电极绝缘层的厚度。
在示例性实施方式中，所述像素定义层设置有位于相邻像素开口之间的隔断槽。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
附图用来提供对本公开技术方案的理解，并且构成说明书的一部分，与本公开的实施例一起用于解释本公开的技术方案，并不构成对本公开技术方案的限制。
图1为一种显示装置的结构示意图；
图2为一种显示装置的平面结构示意图；
图3为一种显示装置中显示区域的平面结构示意图；
图4为一种显示装置的显示区域的剖面结构示意图；
图5为本公开实施例显示装置的平面结构示意图；
图6为本公开实施例显示装置的像素单元中一个子像素边缘区域的剖面结构示意图；
图7为本公开实施例显示装置中子像素边缘区域的像素定义层的剖面结构示意图一；
图8为本公开实施例显示装置中子像素边缘区域的第一发光层的剖面结构示意图一；
图9为本公开实施例显示装置中子像素边缘区域的电荷产生层的剖面结构示意图一；
图10为本公开实施例显示装置中子像素边缘区域的第二发光层的剖面结构示意图一；
图11为本公开实施例显示装置的像素单元中另一个子像素边缘区域的剖面结构示意图；
图12为本公开实施例显示装置中子像素边缘区域的像素定义层的剖面结构示意图二；
图13为本公开实施例显示装置中子像素边缘区域的第一发光层的剖面结构示意图二；
图14为本公开实施例显示装置中子像素边缘区域的电荷产生层的剖面结构示意图二；
图15为本公开实施例显示装置中子像素边缘区域的第二发光层的剖面结构示意图二；
图16为本公开实施例显示装置中像素定义层侧面的坡度角与第一发光层厚度的曲线图；
图17为本公开实施例显示装置中像素定义层侧面的坡度角与电荷产生层的第一凹陷区域深度的曲线图；
图18为本公开实施例显示装置中像素定义层侧面的坡度角与第二发光层的第三凹陷区域宽度的曲线图；
图19为本公开实施例显示装置中第一电极的剖面结构示意图；
图20为本公开实施例显示装置中像素定义层的剖面结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚明白，下文中将结合附图对本公开的实施例进行详细说明。注意，实施方式可以以多个不同形式来实施。所属技术领域的普通技术人员可以很容易地理解一个事实，就是方式和内容可以在不脱离本公开的宗旨及其范围的条件下被变换为各种各样的形式。因此，本公开不应该被解释为仅限定在下面的实施方式所记载的内容中。在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互任意组合。
本公开中的附图比例可以作为实际工艺中的参考，但不限于此。例如：沟道的宽长比、各个膜层的厚度和间距、各个信号线的宽度和间距，可以根据实际需要进行调整。显示装置中像素的个数和每个像素中子像素的个数也不是限定为图中所示的数量，本公开中所描述的附图仅是结构示意图，本公开的一个方式不局限于附图所示的形状或数值等。
本说明书中的“第一”、“第二”、“第三”等序数词是为了避免构成要素的混同而设置，而不是为了在数量方面上进行限定的。
在本说明书中，为了方便起见，使用“中部”、“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示方位或位置关系的词句以参照附图说明构成要素的位置关系，仅是为了便于描述本说明书和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。构成要素的位置关系根据描述各构成要素的方向适当地改变。因此，不局限于在说明书中说明的词句，根据情况可以适当地更换。
在本说明书中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解。例如，可以是固定连接，或可拆卸连接，或一体地连接；可以是机械连接，或电连接；可以是直接相连，或通过中间件间接相连，或两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
在本说明书中，晶体管是指至少包括栅电极、漏电极以及源电极这三个端子的元件。晶体管在漏电极(漏电极端子、漏区域或漏电极)与源电极(源电极端子、源区域或源电极)之间具有沟道区域，并且电流能够流过漏电极、沟道区域以及源电极。注意，在本说明书中，沟道区域是指电流主要流过的区域。
在本说明书中，第一极可以为漏电极、第二极可以为源电极，或者第一极可以为源电极、第二极可以为漏电极。在使用极性相反的晶体管的情况或电路工作中的电流方向变化的情况等下，“源电极”及“漏电极”的功能有时互相调换。因此，在本说明书中，“源电极”和“漏电极”可以互相调换，“源端”和“漏端”可以互相调换。
在本说明书中，“电连接”包括构成要素通过具有某种电作用的元件连接在一起的情况。“具有某种电作用的元件”只要可以进行连接的构成要素间的电信号的授受，就对其没有特别的限制。“具有某种电作用的元件”的例子不仅包括电极和布线，而且还包括晶体管等开关元件、电阻器、电感器、电容器、其它具有各种功能的元件等。
在本说明书中，“平行”是指两条直线形成的角度为-10°以上且10°以下的状态，因此，也包括该角度为-5°以上且5°以下的状态。另外，“垂直”是指两条直线形成的角度为80°以上且100°以下的状态，因此，也包括85°以上且95°以下的角度的状态。
在本说明书中，“膜”和“层”可以相互调换。例如，有时可以将“导电层”换成为“导电膜”。与此同样，有时可以将“绝缘膜”换成为“绝缘层”。
本说明书中三角形、矩形、梯形、五边形或六边形等并非严格意义上的，可以是近似 三角形、矩形、梯形、五边形或六边形等，可以存在公差导致的一些小变形，可以存在导角、弧边以及变形等。
本公开中的“约”，是指不严格限定界限，允许工艺和测量误差范围内的数值。
硅基OLED显示装置采用集成电路对OLED发光器件进行控制，这在很大程度上增加了显示装置的分辨率(通常可以达到3000ppi以上)。而这同样给OLED显示器件带来了巨大的挑战：传统的精细金属掩膜板(Fine metal mask，FMM)最多可以做到800PPI左右，这意味着硅基OLED显示装置很难采用并排单色器件(Side by Side,SBS)的方式进行发光层等有机层的蒸镀，OLED整面蒸镀在硅基OLED显示装置领域几乎成为了必然选择，需要利用其它手段对OLED像素进行分隔。
由于无法像手机等OLED显示装置一样做出SBS单独的RGB单色器件，硅基OLED显示装置只能采用白光器件。一些硅基OLED显示装置采用单一发光层的器件结构实现白光发光，发光器件架构采用多种不同的发光材料组合实现白光，模组亮度一般在80尼特至600尼特，属于中低亮度的显示装置，如果采用该单层结构实现高亮度(大于1000尼特)，会牺牲功耗与寿命，但此类型器件生产瓶颈较低。为了提升硅基OLED显示装置的效能、亮度和寿命，带有至少两个发光层的叠层OLED器件(tandem OLED)被引入，应用所谓的电荷产生层(charge generation layer,CGL)串连两个发光单元，在器件上实现发光叠加的效果，可成功提升电流效率、输出亮度、操作寿命等重要光电性能。
经过本公开发明人的研究发现，像素定义层设置有限定子像素的像素开口，包括至少两个发光层的叠层发光功能层覆盖像素定义层靠近像素开口的侧面，像素定义层侧面的坡度角，会影响像素定义层侧面对应的两个发光层的形貌，容易导致发光层的形貌产生畸变，导致显示装置低灰阶漏光。
本公开实施例提供了一种显示装置，包括：设置在基底上的至少一个像素单元，所述像素单元包括至少两个子像素，所述至少两个子像素包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极；
所述显示装置包括像素定义层，所述像素定义层设置在所述第一电极远离所述基底一侧，所述像素定义层设置有限定所述子像素的像素开口，所述像素开口暴露对应的所述第一电极的至少部分，所述发光功能层覆盖所述像素开口，与暴露的所述第一电极连接；
所述像素定义层设置有靠近所述像素开口且与所述第一电极连接的侧面，所述发光功 能层的至少部分覆盖所述像素定义层的所述侧面，所述至少两个子像素对应的所述像素定义层的所述侧面的坡度角互不相同。
本公开实施例显示装置通过采用不同子像素对应的所述像素定义层的所述侧面的坡度角互不相同，控制坡度角互不相同侧面对应发光功能层的形貌，降低与子像素出射相同颜色光线的发光层形貌的畸变，避免低灰阶漏光，提升显示装置高低灰阶的一致性。
图1为一种显示装置的结构示意图。如图1所示，显示装置可以包括：时序控制器、数据驱动器、扫描驱动器、发光驱动器和像素阵列。时序控制器分别与数据驱动器、扫描驱动器和发光驱动器连接。数据驱动器分别与多个数据信号线(例如，D1到Dn)连接，扫描驱动器分别与多个扫描信号线(例如，S1到Sm)连接，发光驱动器分别与多个发光控制线(例如，E1到Eo)连接。其中，n、m和o可以是自然数。像素阵列可以包括至少两个子像素Pxij，i和j可以是自然数。至少一个子像素Pxij可以包括：像素电路和与像素电路连接的发光器件。像素电路可以分别与扫描信号线、发光控制线和数据信号线连接。
在一些示例性实施例中，时序控制器可以将适合于数据驱动器的规格的灰度值和控制信号提供到数据驱动器，可以将适合于扫描驱动器的规格的时钟信号、扫描起始信号等提供到扫描驱动器，可以将适合于发光驱动器的规格的时钟信号、发射停止信号等提供到发光驱动器。数据驱动器可以利用从时序控制器接收的灰度值和控制信号来产生将提供到数据信号线D1、D2、D3、……和Dn的数据电压。例如，数据驱动器可以利用时钟信号对灰度值进行采样，并且以像素行为单位将与灰度值对应的数据电压施加到数据信号线D1至Dn。扫描驱动器可以通过从时序控制器接收时钟信号、扫描起始信号等来产生将提供到扫描信号线S1、S2、S3、……和Sm的扫描信号。例如，扫描驱动器可以将具有导通电平脉冲的扫描信号顺序地提供到扫描信号线S1至Sm。例如，扫描驱动器可以被构造为移位寄存器的形式，并且可以以在时钟信号的控制下顺序地将以导通电平脉冲形式提供的扫描起始信号传输到下一级电路的方式产生扫描信号。发光驱动器可以通过从时序控制器接收时钟信号、发射停止信号等来产生将提供到发光控制线E1、E2、E3、……和Eo的发光控制信号。例如，发光驱动器可以将具有截止电平脉冲的发射信号顺序地提供到发光控制线E1至Eo。例如，发光驱动器可以被构造为移位寄存器的形式，并且可以以在时钟信号的控制下顺序地将以截止电平脉冲形式提供的发射停止信号传输到下一级电路的方式产生发光控制信号。
图2为一种显示装置的平面结构示意图。如图2所示，在平行于显示装置平面上，显示装置可以包括显示区域100和位于显示区域100外侧的虚设区域300。在示例性实施方式中，显示区域100是进行图像显示的有效区域(AA)，可以包括组成像素阵列的至少两个子像素，子像素可以包括像素驱动电路和显示发光器件，至少两个子像素被配置为显示动态图片或静止图像。在示例性实施方式中，虚设区域300位于显示区域100的外围，可以包括多个虚设发光器件，多个虚设发光器件被配置为呈现显示发光器件的形貌，但不进行图像显示。
在示例性实施方式中，显示装置还可以包括过渡区域200，过渡区域200可以位于显示区域100与虚设区域300之间，即过渡区域200位于显示区域100的外围，虚设区域300位于过渡区域200的外围。在示例性实施方式中，过渡区域200可以包括多个过渡发光器件，多个过渡发光器件被配置为呈现显示发光器件的形貌，但不进行图像显示。
在示例性实施方式中，虚设区域300可以包括相应的信号线，信号线被配置为向显示区域传输所需的信号。过渡区域200可以包括相应的传感器件，传感器件被配置为感测相应温度、亮度等参数，本公开在此不做限定。
图3为一种显示装置中显示区域的平面结构示意图。如图3所示，显示区域可以包括以矩阵方式排布的多个像素单元P，多个像素单元P的至少一个包括出射第一颜色光线的第一子像素P1、出射第二颜色光线的第二子像素P2和出射第三颜色光线的第三子像素P3，第一子像素P1、第二子像素P2和第三子像素P3均包括像素驱动电路和发光器件。子像素中的像素驱动电路分别与扫描信号线和数据信号线连接，像素驱动电路被配置为在扫描信号线的控制下，接收数据信号线传输的数据电压，向显示发光器件输出相应的电流。子像素中的显示发光器件分别与所在子像素的像素驱动电路连接，显示发光器件被配置为响应所在子像素的像素驱动电路输出的电流发出相应亮度的光。
在示例性实施方式中，第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素。在示例性实施方式中，子像素的形状可以是三角形、正方形、矩形、菱形、梯形、平行四边形、五边形、六边形和其它多边形中的任意一种或多种，可以采用水平并列、竖直并列、X形、十字形、品字形、正方形、钻石形或者delta等方式排列，本公开在此不做限定。
在示例性实施方式中，像素单元可以包括四个子像素，本公开在此不做限定。
图4为一种显示装置的显示区域的剖面结构示意图，其中，图4可以为图3中A-A’方向的剖视图。图4示意的显示装置为一种采用白光+彩膜方式实现全彩的结构。如图4所示，在垂直于显示装置的方向上，显示装置可以包括：基底101，设置在基底101上的驱动电路层102，设置在驱动电路层102远离基底101一侧的发光结构层103，设置在发光结构层103远离基底101一侧的第一封装层104，设置在第一封装层104远离基底101一侧的彩膜结构层105，设置在彩膜结构层105远离基底101一侧的第二封装层106，以及设置在第二封装层106远离基底101一侧的盖板层107。在一些可能的实现方式中，显示装置可以包括其它膜层，例如，触控膜层等，本公开在此不做限定。
在示例性实施方式中，基底101可以为体基底或者绝缘层上硅(SOI，Silicon-On-Insulator)基底。驱动电路层102可以通过硅半导体工艺(例如CMOS工艺)制备在基底101上，驱动电路层102可以包括多个电路单元，电路单元可以至少包括像素驱动电路，像素驱动电路分别与扫描信号线和数据信号线连接，像素驱动电路可以包括多个晶体管和存储电容，图4中仅以一个晶体管作为示例。晶体管可以包括控制极G、第一极S和第二极D，控制极G、第一极S和第二极D可以通过钨金属填充的过孔(即钨过孔，W-via)分别与相应的连接电极连接，并可以通过连接电极与其它电学结构(如走线等)进行连接。
在示例性实施方式中，发光结构层103可以包括多个发光器件，发光器件可以至少包括第一电极、发光功能层和第二电极，第一电极可以通过连接电极与晶体管的第二极D连接，发光功能层与第一电极连接，第二电极与发光功能层连接，第二电极与电压线连接，发光功能层在第一电极和第二电极驱动下出射光线。在示例性实施方式中，发光功能层可以包括至少一个发光单元，至少一个发光单元可以包括发光层(简称EML)，以及如下任意一种多种：空穴注入层(HIL)、空穴传输层(HTL)、电子阻挡层(EBL)、空穴阻挡层(HBL)、电子传输层(ETL)和电子注入层(EIL)。在示例性实施方式中，对于出射白光的发光器件，所有子像素的发光功能层中的一些膜层可以是连接在一起的共通层，例如第二电极。
在示例性实施方式中，发光器件可以为叠层(tandem)发光器件，并发射白光，叠层发光器件的发光功能层包括沿着垂直基底方向堆叠且串联的至少两个发光单元，相邻两个发光单元之间设有电荷产生层，电荷产生层在第一电极和第二电极的电压作用下产生空穴和电子。
在示例性实施方式中，第一封装层104和第二封装层106可以采用薄膜封装(Thin Film Encapsulation，简称TFE)方式，可以保证外界水汽无法进入发光结构层，盖板层107可以采用玻璃，或者采用具可挠特性的塑胶类无色聚酰亚胺等。
在示例性实施方式中，彩膜结构层105可以包括黑矩阵(BM)和彩色滤光片(CF)，彩色滤光片的位置可以与发光器件的位置相对应，黑矩阵可以位于相邻的彩色滤光片之间，彩色滤光片被配置为将发光器件出射的白光过滤成红色(R)光、绿色(G)光和蓝色(B)光，形成红色子像素、绿色子像素和蓝色子像素。
图5为本公开实施例显示装置的平面结构示意图。如图5所示，本公开实施例显示装置可以包括设置在基底上以矩阵方式排布的多个像素单元P，多个像素单元P的至少一个包括出射第一颜色光线的第一子像素P1、出射第二颜色光线的第二子像素P2、出射第三颜色光线的第三子像素P3，以及位于相邻子像素之间的非子像素区10。第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素。第一子像素P1、第三子像素P3和第二子像素P2沿着第一方向D1间隔排布。第一子像素P1、第三子像素P3和第二子像素P2在基底上的正投影的形状均为六边形。在一些实施例中，子像素的形状可以是三角形、正方形、矩形、菱形、梯形、平行四边形、五边形和其它多边形中的任意一种或多种，可以采用竖直并列、X形、十字形、品字形、正方形、钻石形或者delta等方式排列，本公开在此不做限定。
在示例性实施方式中，本公开实施例显示装置还包括像素定义层，像素定义层设置有至少两个像素开口，至少两个像素开口与至少两个子像素一一对应设置，每个像素开口限定对应的子像素，像素开口限定的区域为对应子像素的区域。示例的，像素定义层包括第一像素开口1-1、第二像素开口1-2和第三像素开口1-3，第一像素开口1-1限定第一子像素P1，第二像素开口1-2限定第二子像素P2，第三像素开口1-3限定第三子像素P3。
在示例性实施方式中，像素单元中的各子像素均为双发光层的叠层器件。
在示例性实施方式中，像素单元包括出射第一颜色光线的第一子像素P1、出射第二颜色光线的第二子像素P2、出射第三颜色光线的第三子像素P3，第一子像素P1、第二子像素P2和第三子像素P3均为黄发光层(Y层)+蓝发光层(B层)的双发光层的叠层器件。具体地，第一子像素P1、第二子像素P2和第三子像素P3均包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极。所述发光功能层包括沿着远离所述 基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；各子像素的发光功能层的第一发光单元出射光线的颜色包括第一颜色光线和第二颜色光线，即黄色光线，各子像素的发光功能层的第二发光单元出射光线的颜色包括第三颜色光线，即蓝色光线。所述像素单元包括第一子像素组和第二子像素组，所述第一子像素组可以包括第一子像素P1和第二子像素P2，所述第二子像素组可以包括第三子像素P3，所述第一子像素组的第一子像素P1和第二子像素P2对应的所述像素定义层的所述侧面具有第一坡度角，所述第二子像素组的第三子像素P3对应的所述像素定义层的所述侧面具有第二坡度角，所述第二坡度角大于所述第一坡度角。
在示例性实施方式中，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
在示例性实施方式中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°。
在示例性实施方式中，像素单元包括出射第一颜色光线的第一子像素P1、出射第二颜色光线的第二子像素P2、出射第三颜色光线的第三子像素P3，第一子像素P1、第二子像素P2和第三子像素P3均为蓝发光层(B层)+黄发光层(Y层)的双发光层的叠层器件。具体地，第一子像素P1、第二子像素P2和第三子像素P3均包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极。所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；各子像素的发光功能层的第一发光单元出射光线的颜色包括第三颜色光线，即蓝色光线，各子像素的发光功能层的第二发光单元出射光线的颜色包括第一颜色光线和第二颜色光线，即黄色光线。所述像素单元包括第一子像素组和第二子像素组，所述第一子像素组可以包括第三子像素P3，所述第二子像素组可以包括第一子像素P1和第二子像素P2，所述第一子像素组的第三子像素P3对应的所述像素定义层的所述侧面具有第一坡度角，所述第二子像素组的第一子像素P1和第二子像素P2对应的所述像素定义层的所述侧面具有第二坡度角，所述第二坡度角大于所述第一坡度角。
在示例性实施方式中，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
在示例性实施方式中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°。
在示例性实施方式中，像素单元中的各子像素均为三发光层的叠层器件。
在示例性实施方式中，像素单元中的各子像素均包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极。各子像素的发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元、第二发光单元和第三发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的第一电荷产生层，设置在所述第二发光单元和所述第三发光单元之间的第二电荷产生层；所述像素单元包括第一子像素组、第二子像素组和第三子像素组，所述第一子像素组包括至少一个子像素，所述第一发光单元出射光线的颜色包括所述第一子像素组的子像素出射光线的颜色，所述第一子像素组的子像素对应的所述像素定义层的所述侧面具有第一坡度角；所述第二子像素组包括至少一个子像素，所述第二发光单元出射光线的颜色包括所述第二子像素组的子像素出射光线的颜色，所述第二子像素组的子像素对应的所述像素定义层的所述侧面具有第二坡度角；所述第三子像素组包括至少一个子像素，所述第三发光单元出射光线的颜色包括所述第三子像素组的子像素出射光线的颜色，所述第三子像素组的子像素对应的所述像素定义层的所述侧面具有第三坡度角，所述第三坡度角大于所述第一坡度角，所述第二坡度角大于所述第一坡度角。
在示例性实施方式中，所述第三坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
在示例性实施方式中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°，所述第三坡度角大于60°小于或等于90°。
图6为本公开实施例显示装置的像素单元中一个子像素边缘区域的剖面结构示意图一。在示例性实施方式中，如图6所示，本公开实施例显示装置的像素单元包括至少两个子像素20以及位于相邻子像素20之间的非子像素区10，像素单元的子像素20为双发光层的叠层器件。在垂直于显示装置的方向上，像素单元中一个子像素20可以包括设置在基底101上的驱动电路层102，设置在驱动电路层102远离基底101一侧的第一绝缘层14，设置在第一绝缘层14远离基底101一侧的第二绝缘层15，设置在第二绝缘层15远离基底101一侧的发光结构层，发光结构层包括设置在第二绝缘层15远离基底101一侧的第一电极11，设置在第一电极11远离基底101一侧的发光功能层12，设置在发光功能层12远离基底101一侧的第二电极13。其中，第一绝缘层14包括氧化硅，第二绝缘层15包括氮化硅。
在示例性实施方式中，本公开实施例显示装置的像素密度大于或等于2000ppi。
在示例性实施方式中，本公开实施例显示装置还包括像素定义层21，像素定义层21位于非子像素区10，像素定义层21设置在第一电极11远离基底101一侧，像素定义层21设置有限定子像素的像素开口1，像素开口1暴露至少部分第一电极11，发光功能层12覆盖像素开口1，与像素开口1暴露的第一电极11接触。
在示例性实施方式中，发光功能层12可以包括沿着远离所述基底101方向依次堆叠的第一发光单元12-1和第二发光单元12-2，以及设置在所述第一发光单元12-1和所述第二发光单元12-2之间的电荷产生层30。
在示例性实施方式中，第一发光单元12-1位于第二发光单元12-2靠近基底一侧，通过电荷产生层30与第二发光单元12-2串联。
本公开实施例显示装置通过将第一发光单元12-1出射的光线与第二发光单元12-2出射的光线叠加，实现出射白光的效果。
在示例性实施方式中，第一发光单元12-1可以包括沿着远离所述基底101方向依次堆叠的第一辅助层41、第一发光层31和第二辅助层42。第一辅助层41可以包括如下任意一种或多种：第一空穴注入层(HIL)和第一空穴传输层(HTL)。第二辅助层42可以包括如下任意一种或多种：第一电子传输层(ETL)、第一电子注入层(EIL)和第一空穴阻挡层(HBL)。
在示例性实施方式中，第二发光单元12-2可以包括沿着远离所述基底101方向依次堆叠的第三辅助层43、第二发光层32和第四辅助层44。第三辅助层43可以包括如下任意一种或多种：第二空穴注入层(HIL)和第二空穴传输层(HTL)。第四辅助层44可以包括如下任意一种或多种：第二电子传输层(ETL)、第二电子注入层(EIL)和第二空穴阻挡层(HBL)。
在示例性实施方式中，第一电极11可以包括沿着垂直于基底方向依次堆叠的第一导电层11-1、第二导电层11-2和第三导电层11-3，第一导电层11-1设置在第二绝缘层15远离基底101一侧；第二导电层11-2设置在第一导电层11-1远离基底101一侧，且与第一导电层11-1接触；第三导电层11-3设置在第二导电层11-2远离基底101一侧，且覆盖第二导电层11-2的侧表面和远离基底101一侧的表面，第三导电层11-3将第二导电层11-2的侧表面和远离基底101一侧的表面包裹。其中，第一导电层11-1和第三导电层11-3的 材料可以为金属化合物，例如氮化钛，第二导电层11-2的材料可以为导电金属，例如，铝、铜等。
在示例性实施方式中，第二电极13的材料包括金属氧化物，例如，氧化铟锌；或者，第二电极13的材料包括合金，例如，镁银合金。
在示例性实施方式中，像素定义层21设置有靠近像素开口1的侧面，发光功能层12中的至少部分膜层覆盖像素定义层21的侧面，并在像素定义层21的侧面对应的区域形成凹陷区域。例如，发光功能层12中的第一发光层31、第二发光层32和电荷产生层30在像素定义层21的侧面对应的区域形成凹陷区域。
图7为本公开实施例显示装置中子像素边缘区域的像素定义层的剖面结构示意图一。其中，图7示意了图6所示显示装置中子像素边缘区域的像素定义层的结构。在示例性实施方式中，如图7所示，在垂直于显示装置的方向上，像素定义层21包括沿着远离所述基底方向依次堆叠的第一定义层21-1、第二定义层21-2和第三定义层21-3。第一定义层21-1的至少部分覆盖第一电极11远离基底一侧表面的边缘区域，以及第一电极11的侧面。第一定义层21-1具有靠近像素开口1的第一侧面51，第二定义层21-2具有靠近像素开口的第二侧面52，第三定义层21-3具有靠近像素开口的第三侧面53。
在示例性实施方式中，发光功能层12的至少部分膜层覆盖第一定义层21-1的第一侧面51，例如，发光功能层12的第一发光层、电荷产生层以及第二发光层覆盖第一定义层21-1的第一侧面51。
在示例性实施方式中，第一侧面51与第一电极11远离基底一侧表面连接，第一侧面51分别相较于第二侧面52和第三侧面53伸出，第一侧面51具有第一坡度角a1，第一坡度角a1大于或等于30°小于或等于60°，示例的，第一坡度角a1大于或等于45°小于或等于50°。其中，第一坡度角a1为第一侧面51的延长线与基底所在平面之间形成的夹角。
在示例性实施方式中，第二侧面52分别相较于第一侧面51和第三侧面53凹入，形成沿着平行于基底方向凹入的槽体。
在示例性实施方式中，第三侧面53相较于第二侧面52伸出，形成底切结构。该底切结构可以将其上方的发光功能层12的部分膜层隔断。示例的，发光功能层21中的第一发光层31和电荷产生层30在该底切结构处隔断，从而防止电荷在相邻子像素之间串扰，避 免像素串色。
图8为本公开实施例显示装置中子像素边缘区域的第一发光层的剖面结构示意图一。其中，图8示意了图6所示显示装置中子像素边缘区域的第一发光层的结构。在示例性实施方式中，如图8所示，第一发光层31远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第二凹陷区域31-3，第二凹陷区域31-3靠近所述子像素中间区域的一端连接有第二平坦面31-1，第二平坦面31-1平行于所述基底，所述第二凹陷区域31-3远离所述子像素中间区域的一端连接有第二凸起31-2，第二凹陷区域31-3的底部呈弧状，第二凹陷区域31-3远离所述第二平坦面31-1的侧面的坡度角b1大于或等于30°小于或等于60°。示例的，第二凹陷区域31-3远离所述第二平坦面31-1的侧面的坡度角b1大于或等于45°小于或等于55°。
在示例性实施方式中，第二凹陷区域31-3的最低点至所述第二平坦面31-1的垂直距离H1大于或等于30埃小于或等于80埃。示例的，第二凹陷区域31-3的最低点至所述第二平坦面31-1的最高点的垂直距离H1大于或等于50埃小于或等于70埃。
在示例性实施方式中，第二凹陷区域31-3的最低点至所述第二平坦面31-1边缘的最小距离L1大于或等于30埃小于或等于100埃。示例的，第二凹陷区域31-3的最低点至所述第二平坦面31-1边缘的最小距离L1大于或等于50埃小于或等于80埃。
本公开实施例显示装置通过控制像素定义层的第一侧面的第一坡度角a1大于或等于30°小于或等于60°，降低第一发光层的第二凹陷区域31-3形貌的畸变，避免显示装置低灰阶漏光，提升显示装置高低灰阶的一致性。
图9为本公开实施例显示装置中子像素边缘区域的电荷产生层的剖面结构示意图一。其中，图9示意了图6所示显示装置中子像素边缘区域的电荷产生层的结构。在示例性实施方式中，如图9所示，电荷产生层30远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第一凹陷区域30-3，所述第一凹陷区域30-3靠近所述子像素中间区域的一端连接有第一平坦面30-1，第一平坦面30-1平行于基底，所述第一凹陷区域30-3远离所述子像素中间区域的一端连接有第一凸起30-2，第一凹陷区域30-3的底部呈弧状，第一凹陷区域30-3远离所述第一平坦面30-1的侧面的坡度角b2大于或等于30°小于或等于60°。示例的，第一凹陷区域30-3远离所述第一平坦面30-1的侧面的坡度角b2大于或等于45°小于或等于55°。
在示例性实施方式中，所述第一凹陷区域30-1的最低点至所述第一平坦面30-1的垂 直距离H2大于或等于4埃小于或等于9埃。
本公开实施例显示装置通过控制子像素对应的像素定义层的第一侧面的第一坡度角a1大于或等于30°小于或等于60°，避免电荷产生层在像素定义层的侧面处形成穿刺，降低电荷产生层的载流子堆积，提升显示装置的使用寿命。
图10为本公开实施例显示装置中子像素边缘区域的第二发光层的剖面结构示意图一。其中，图10示意了图6所示显示装置中子像素边缘区域的第二发光层的结构。在示例性实施方式中，如图10所示，第二发光层32远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第三凹陷区域32-3，所述第三凹陷区域32-3靠近所述子像素中间区域的一端连接有第三平坦面32-1，第三平坦面32-1平行于基底，所述第三凹陷区域32-3远离所述子像素中间区域的一端连接有第三凸起32-2，第三凹陷区域32-3远离所述第三平坦面32-1的侧面的坡度角b3大于60°小于或等于90°。示例的，第三凹陷区域32-3远离所述第三平坦面32-1的侧面的坡度角b3大于或等于75°小于或等于85°。
在示例性实施方式中，第三凹陷区域32-3的最低点至所述第三平坦面32-1的垂直距离H3大于70埃小于或等于80埃。
在示例性实施方式中，第三凹陷区域32-3的最低点至所述第三平坦面32-1边缘的最小距离L2小于100埃。示例的，第三凹陷区域32-3的最低点至所述第三平坦面32-1边缘的最小距离L2可以大于或等于30埃小于或等于60埃。
当本公开实施例图6所示的子像素为第一子像素或第二子像素时，第一发光单元12-1出射光线的颜色至少包括第一子像素出射光线的颜色和第二子像素出射光线的颜色，第二发光单元12-2出射光线的颜色至少包括第三子像素出射光线的颜色。示例的，第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素；第一发光单元12-1可以出射黄色光线，第一发光单元12-1的第一发光层31可以包括层叠设置的绿色发光层和红色发光层，绿色发光层和红色发光层互相堆叠，实现第一发光单元12-1出射黄光。第二发光单元12-2可以出射蓝色光线，第二发光单元12-2的第二发光层32可以为蓝色发光层，实现第二发光单元12-2出射蓝光。
本公开实施例显示装置通过控制第一子像素或第二子像素对应的像素定义层的第一侧面的第一坡度角a1大于或等于30°小于或等于60°，降低出射黄色光线的第一发光层 的第二凹陷区域31-3形貌的畸变，避免第一子像素或第二子像素低灰阶漏光，提升显示装置高低灰阶的一致性。
当本公开实施例图6所示的子像素为第三子像素时，第一发光单元12-1出射光线的颜色至少包括第三子像素出射光线的颜色，第二发光单元12-2出射光线的颜色至少包括第一子像素出射光线的颜色和第二子像素出射光线的颜色。示例的，第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素；第一发光单元12-1可以出射蓝色光线，第一发光单元12-1的第一发光层31可以为蓝色发光层，实现第一发光单元12-1出射蓝光。第二发光单元12-2可以出射黄色光线，第二发光单元12-2的第二发光层32可以包括层叠设置的绿色发光层和红色发光层，绿色发光层和红色发光层互相堆叠，实现第二发光单元12-2出射黄色光线。
本公开实施例显示装置通过控制第三子像素对应的像素定义层的侧面的第一坡度角a1大于或等于30°小于或等于60°，降低出射蓝色光线的第一发光层的第二凹陷区域31-3形貌的畸变，避免第三子像素低灰阶漏光，提升显示装置高低灰阶的一致性。
图11为本公开实施例显示装置的像素单元中另一个子像素边缘区域的剖面结构示意图。在示例性实施方式中，如图11所示，本公开实施例显示装置的像素单元中另一个子像素边缘区域的结构与图6所示的子像素边缘区域的结构大体相同，区别在于，所述子像素对应的所述像素定义层21的所述第一侧面的坡度角大于60°小于或等于90°，发光功能层中的膜层在所述像素定义层21的所述第一侧面对应区域形成的凹陷区域的形貌与图6所示的发光功能层中的膜层的凹陷区域的形貌不同。
图12为本公开实施例显示装置中子像素边缘区域的像素定义层的剖面结构示意图二。其中，图12示意了图11所示显示装置中子像素边缘区域的像素定义层的结构。在示例性实施方式中，如图12所示，在垂直于显示装置的方向上，像素定义层21包括沿着远离所述基底方向依次堆叠的第一定义层21-1、第二定义层21-2和第三定义层21-3。第一定义层21-1的至少部分覆盖第一电极11远离基底一侧表面的边缘区域，以及第一电极11的侧面。第一定义层21-1具有靠近像素开口的第一侧面51’，第二定义层21-2具有靠近像素开口的第二侧面52’，第三定义层21-3具有靠近像素开口的第三侧面53’。
在示例性实施方式中，发光功能层12的至少部分覆盖第一定义层21-1的第一侧面51’，例如，发光功能层12的第一发光层、电荷产生层以及第二发光层覆盖第一定义层 21-1的第一侧面51’。
在示例性实施方式中，第一侧面51’靠近基底一端与第一电极11远离基底一侧表面连接，第一侧面51’分别相较于第二侧面52’和第三侧面53’伸出，第三子像素对应的像素开口1的第一侧面51’具有第二坡度角a2，第二坡度角a2大于60°小于或等于90°。示例的，第二坡度角a2大于或等于75°小于或等于85°。其中，第二坡度角a2为第一侧面51’的延长线与基底所在平面之间形成的夹角。
在示例性实施方式中，第二侧面52’分别相较于第一侧面51’和第三侧面53’凹入，形成沿着平行于基底方向凹入的槽体。
在示例性实施方式中，第三侧面53’相较于第二侧面52’伸出，形成底切结构。该底切结构可以将其上方的发光功能层12的部分膜层隔断。示例的，发光功能层21中的第一发光层31和电荷产生层30在该底切结构处隔断，防止电荷在相邻子像素之间串扰，避免像素串色。
图13为本公开实施例显示装置中子像素边缘区域的第一发光层的剖面结构示意图二。其中，图13示意了图11所示显示装置中子像素边缘区域的第一发光层的结构。在示例性实施方式中，如图13所示，第一发光层31远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第二凹陷区域31-3，第二凹陷区域31-3靠近所述子像素中间区域的一端连接有第二平坦面31-1，第二平坦面31-1平行于所述基底，所述第二凹陷区域31-3远离所述子像素中间区域的一端连接有第二凸起31-2，第二凹陷区域31-3的底部呈弧状，第二凹陷区域31-3远离所述第二平坦面31-1的侧面的坡度角b1’大于60°小于或等于90°。示例的，第二凹陷区域31-3远离所述第二平坦面31-1的侧面的坡度角b1’大于或等于75°小于或等于85°。
在示例性实施方式中，第二凹陷区域31-3的最低点至所述第二平坦面31-1的垂直距离H1’大于80埃小于或等于120埃。示例的，第二凹陷区域31-3的垂直距离H1’大于或等于90埃小于或等于110埃。
在示例性实施方式中，第二凹陷区域31-3的最低点至所述第二平坦面31-1边缘的最小距离L1’大于100埃小于或等于300埃。示例的，第二凹陷区域31-3的最低点至所述第二平坦面31-1边缘的最小距离L1’大于或等于150埃小于或等于250埃。
图14为本公开实施例显示装置中子像素边缘区域的电荷产生层的剖面结构示意图 二。其中，图14示意了图11所示显示装置中子像素边缘区域的电荷产生层的结构。在示例性实施方式中，如图14所示，电荷产生层30远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第一凹陷区域30-3，所述第一凹陷区域30-3靠近所述子像素中间区域的一端连接有第一平坦面30-1，第一平坦面30-1平行于基底，所述第一凹陷区域30-3远离所述子像素中间区域的一端连接有第一凸起30-2，第一凹陷区域30-3的底部呈角状，第一凹陷区域30-3远离所述第一平坦面30-1的侧面的坡度角b2’大于60°小于或等于90°。示例的，第一凹陷区域30-3远离所述第一平坦面30-1的侧面的坡度角b2’大于或等于75°小于或等于85°。
在示例性实施方式中，所述第一凹陷区域30-1的最低点与所述第一平坦面30-1的垂直距离H2’大于9埃小于或等于14埃。
图15为本公开实施例显示装置中子像素边缘区域的第二发光层的剖面结构示意图二。其中，图15示意了图11所示显示装置中子像素边缘区域的第二发光层的结构。在示例性实施方式中，如图15所示，第二发光层32远离所述基底一侧的表面在所述像素定义层的所述第一侧面对应区域形成第三凹陷区域32-3，所述第三凹陷区域32-3靠近所述子像素中间区域的一端连接有第三平坦面32-1，第三平坦面32-1平行于基底，所述第三凹陷区域32-3远离所述子像素中间区域的一端连接有第三凸起32-2，第三凹陷区域32-3远离所述第三平坦面32-1的侧面的坡度角b3’大于或等于30°小于或等于60°。示例的，第三凹陷区域32-3远离所述第三平坦面32-1的侧面的坡度角b3’大于或等于45°小于或等于55°。
在示例性实施方式中，第三凹陷区域32-3的最低点至所述第三平坦面32-1的垂直距离H3’大于或等于60埃小于或等于70埃。
在示例性实施方式中，第三凹陷区域32-3的最低点至所述第三平坦面32-1边缘的最小距离L2’大于或等于100埃小于或等于300埃。示例的，第三凹陷区域32-3的最低点至所述第三平坦面32-1边缘的最小距离L2’大于或等于150埃小于或等于200埃。
本公开实施例显示装置通过控制子像素对应的像素定义层的侧面的第一坡度角a2大于60°小于或等于90°，降低第二发光层的第三凹陷区域32-3形貌的畸变，避免低灰阶漏光，提升显示装置高低灰阶的一致性。
当本公开实施例图11所示的子像素为第一子像素或第二子像素时，第一发光单元12-1出射光线的颜色至少包括第三子像素出射光线的颜色，第二发光单元12-2出射光线 的颜色至少包括第一子像素出射光线的颜色和第二子像素出射光线的颜色。示例的，第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素；第一发光单元12-1可以出射蓝色光线，第一发光单元12-1的第一发光层31可以为蓝色发光层，实现第一发光单元12-1出射蓝光。第二发光单元12-2可以出射黄色光线，第二发光单元12-2的第二发光层32可以包括层叠设置的绿色发光层和红色发光层，绿色发光层和红色发光层互相堆叠，实现第二发光单元12-2出射黄光。
本公开实施例显示装置通过控制第一子像素或第二子像素对应的像素定义层的侧面的第二坡度角a2大于60°小于或等于90°，降低出射黄色光线的第二发光层的第三凹陷区域形貌的畸变，避免第一子像素或第二子像素低灰阶漏光，提升显示装置高低灰阶的一致性。
当本公开实施例图11所示的子像素为第三子像素时，第一发光单元12-1出射光线的颜色至少包括第一子像素出射光线的颜色和第二子像素出射光线的颜色，第二发光单元12-2出射光线的颜色至少包括第三子像素出射光线的颜色。示例的，第一子像素P1可以是出射红色(R)光线的红色子像素、第二子像素P2可以是出射绿色(G)光线的绿色子像素，第三子像素P3可以是出射蓝色(B)光线的蓝色子像素；第一发光单元12-1可以出射黄色光线，第一发光单元12-1的第一发光层31可以包括层叠设置的绿色发光层和红色发光层，绿色发光层和红色发光层互相堆叠，实现第一发光单元12-1出射黄光；第二发光单元12-2可以出射蓝色光线，第二发光单元12-2的第二发光层32可以为蓝色发光层，实现第二发光单元12-2出射蓝光。
本公开实施例显示装置通过控制第三子像素对应的像素定义层的侧面的第二坡度角a2大于60°小于或等于90°，降低出射蓝色光线的第二发光层的第三凹陷区域形貌的畸变，避免第三子像素低灰阶漏光，提升显示装置高低灰阶的一致性。
图16为本公开实施例显示装置中像素定义层侧面的坡度角与第一发光层厚度的曲线图。如图16所示，对本公开实施例显示装置的子像素进行仿真实验，像素定义层侧面的坡度角大于或等于30°小于或等于60°，第二凹陷区域处的第一发光层的厚度均匀。像素定义层侧面的坡度角大于60°小于或等于90°，第二凹陷区域处的第一发光层的厚度均匀。其中，第一发光层的厚度为第一发光层远离基底一侧表面至第一发光层靠近基底一侧表面之间的垂直距离。
图17为本公开实施例显示装置中像素定义层侧面的坡度角与电荷产生层的第一凹陷区域深度的曲线图。如图17所示，对本公开实施例显示装置的子像素进行仿真实验，电荷产生层的第一凹陷区域的深度随着像素定义层侧面的坡度角的增大而增大。像素定义层侧面的坡度角大于或等于30°小于或等于60°，电荷产生层的第一凹陷区域的深度大于或等于4埃小于或等于9埃。像素定义层侧面的坡度角大于60°小于或等于90°，电荷产生层的第一凹陷区域的深度大于9埃小于或等于14埃。其中，第一凹陷区域的深度为第一凹陷区域的最低点至第一平坦面的垂直距离。
图18为本公开实施例显示装置中像素定义层侧面的坡度角与第二发光层的第三凹陷区域宽度的曲线图。如图18所示，对本公开实施例显示装置的子像素进行仿真实验，第二发光层的第三凹陷区域宽度随着像素定义层侧面的坡度角的增大而减小。像素定义层侧面的坡度角大于或等于30°小于或等于60°，第二发光层的第三凹陷区域宽度大于或等于100埃小于或等于300埃；像素定义层侧面的坡度角大于60°小于或等于90°，第二发光层的第三凹陷区域宽度小于100埃。其中，第三凹陷区域宽度为第三凹陷区域的最低点至所述第三平坦面边缘的最小距离。
图19为本公开实施例显示装置中第一电极的剖面结构示意图。在示例性实施方式中，如图19所示，第一电极11还包括设置在所述第二导电层11-2与所述第三导电层11-3之间的电极绝缘层11-4，电极绝缘层11-4中设置有过孔，所述第三导电层11-3通过所述过孔与所述第二导电层11-2连接。
在示例性实施方式中，像素单元包括出射第一颜色光线的第一子像素P1、出射第二颜色光线的第二子像素P2和出射第三颜色光线的第三子像素P3，第三子像素P3的所述第一电极11远离所述基底一侧表面至所述基底101表面的垂直距离h3，大于所述第一子像素P1的所述第一电极11远离所述基底101一侧表面至所述基底101表面的垂直距离h1，所述第一子像素P1的所述第一电极11远离所述基底101一侧表面至所述基底101表面的垂直距离h1，大于所述第二子像素P2的所述第一电极11远离所述基底一侧表面至所述基底表面的垂直距离h2。
在示例性实施方式中，所述第一子像素P1、所述第二子像素P2和所述第三子像素P3中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，例如，黄光，所述第二发光单 元出射光线的颜色包括所述第三颜色，例如，蓝光，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第一子像素对应的所述像素定义层的所述侧面的坡度角，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第二子像素对应的所述像素定义层的所述侧面的坡度角。
在示例性实施方式中，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°。
本公开实施例显示装置通过第一发光单元出射黄光，第二发光单元出射蓝光，使第三子像素P3对应的像素定义层的侧面的坡度角较大，以及第三子像素P3的所述第一电极11远离所述基底一侧表面至所述基底101表面的垂直距离较大，降低第三子像素P3中出射蓝光的第二发光单元的发光层形貌的畸变，避免第三子像素P3低灰阶漏光，提升显示装置高低灰阶的一致性。
本公开实施例显示装置通过第一发光单元出射黄光，第二发光单元出射蓝光，使第一子像素P1和第二子像素P2对应的像素定义层的侧面的坡度角较小，以及第一子像素P1和第二子像素P2的所述第一电极11远离所述基底一侧表面至所述基底101表面的垂直距离较小，降低第一子像素P1和第二子像素P2中出射黄光的第一发光单元的发光层形貌的畸变，避免第一子像素P1和第二子像素P2低灰阶漏光，提升显示装置高低灰阶的一致性。
在示例性实施方式中，所述第一子像素P1、所述第二子像素P2和所述第三子像素P3中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括第三颜色，例如，蓝光，所述第二发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，例如，黄光，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所述像素定义层的所述侧面的坡度角，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所述像素定义层的所述侧面的坡度角。
在示例性实施方式中，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第一子像素对应的所述像素定义层的所述侧面的坡 度角大于60°小于或等于90°。
本公开实施例显示装置通过第一发光单元出射蓝光，第二发光单元出射黄光，使第三子像素P3对应的像素定义层的侧面的坡度角较小，以及第三子像素P3的所述第一电极11远离所述基底一侧表面至所述基底101表面的垂直距离较大，降低第三子像素P3中出射蓝光的第一发光单元的发光层形貌的畸变，避免第三子像素P3低灰阶漏光，提升显示装置高低灰阶的一致性。
本公开实施例显示装置通过第一发光单元出射蓝光，第二发光单元出射黄光，使第一子像素P1和第二子像素P2对应的像素定义层的侧面的坡度角较大，以及第一子像素P1和第二子像素P2的所述第一电极11远离所述基底一侧表面至所述基底101表面的垂直距离较小，降低第一子像素P1和第二子像素P2中出射黄光的第二发光单元的发光层形貌的畸变，避免第一子像素P1和第二子像素P2低灰阶漏光，提升显示装置高低灰阶的一致性。
在示例性实施方式中，所述第三子像素P3的所述第一电极11的所述电极绝缘层11-4的厚度，大于所述第一子像素P1的所述第一电极11的所述电极绝缘层11-4的厚度，所述第一子像素P1的所述第一电极11的所述电极绝缘层11-4的厚度，大于所述第二子像素P2的所述第一电极11的所述电极绝缘层11-4的厚度。
图20为本公开实施例显示装置中像素定义层的剖面结构示意图。在示例性实施方式中，如图20所示，像素定义层21中设置有隔断槽22，隔断槽22位于非子像素区，发光功能层的至少部分膜层覆盖隔断槽22的底壁和侧壁，形成凹陷区域，避免相邻子像素串扰。
本公开实施例显示装置可以为：手机、穿戴设备、AR或VR显示设备、车载显示设备、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件，本发明实施例并不以此为限。
本公开实施例还提供了一种显示装置的制备方法，所述显示装置包括至少一个像素单元，所述像素单元包括至少两个子像素，所述显示装置的制备方法包括：
在基底上形成第一电极；
在所述第一电极远离所述基底一侧形成像素定义层，所述像素定义层设置有限定所述子像素的像素开口，所述像素开口暴露对应的所述第一电极的至少部分，所述像素定义层设置有靠近所述像素开口且与所述第一电极连接的侧面；
在所述像素定义层远离所述基底一侧形成发光功能层，所述发光功能层覆盖所述像素开口，与暴露的所述第一电极连接，所述发光功能层的至少部分覆盖所述像素定义层的所述侧面；
在所述发光功能层远离所述基底一侧形成第二电极；
其中，所述像素单元中至少两个子像素对应的所述像素定义层的所述侧面的坡度角互不相同。
虽然本公开所揭露的实施方式如上，但所述的内容仅为便于理解本公开而采用的实施方式，并非用以限定本发明。任何所属领域内的技术人员，在不脱离本公开所揭露的精神和范围的前提下，可以在实施的形式及细节上进行任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (35)

  1. 一种显示装置，包括：设置在基底上的至少一个像素单元，所述像素单元包括至少两个子像素，所述至少两个子像素包括沿着远离所述基底方向依次层叠设置的第一电极、发光功能层以及第二电极；
    所述显示装置包括像素定义层，所述像素定义层设置在所述第一电极远离所述基底一侧，所述像素定义层设置有限定所述子像素的像素开口，所述像素开口暴露对应的所述第一电极的至少部分，所述发光功能层覆盖所述像素开口，与暴露的所述第一电极连接；
    所述像素定义层设置有靠近所述像素开口且与所述第一电极连接的侧面，所述发光功能层的至少部分覆盖所述像素定义层的所述侧面，所述至少两个子像素对应的所述像素定义层的所述侧面的坡度角互不相同。
  2. 根据权利要求1所述的显示装置，其中，所述发光功能层在所述像素定义层的所述侧面对应区域形成凹陷区域，坡度角互不相同的所述像素定义层的所述侧面对应的所述凹陷区域侧面的坡度角互不相同。
  3. 根据权利要求1所述的显示装置，其中，所述像素单元中至少一个子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述像素单元中至少一个子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°。
  4. 根据权利要求1所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述像素单元包括第一子像素组和第二子像素组，所述第一子像素组包括至少一个子像素，所述第一发光单元出射光线的颜色包括所述第一子像素组的子像素的出射光线的颜色，所述第一子像素组的子像素对应的所述像素定义层的所述侧面具有第一坡度角，所述第二子像素组包括至少一个子像素，所述第二发光单元出射光线的颜色包括所述第二子像素组的子像素的出射光线的颜色，所述第二子像素组的子像素对应的所述像素定义层的所述侧面具有第二坡度角，所述第二坡度角大于所述第一坡度角。
  5. 根据权利要求4所述的显示装置，其中，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
  6. 根据权利要求4所述的显示装置，其中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°。
  7. 根据权利要求1所述的显示装置，其中，所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元、第二发光单元和第三发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的第一电荷产生层，设置在所述第二发光单元和所述第三发光单元之间的第二电荷产生层；所述像素单元包括第一子像素组、第二子像素组和第三子像素组，所述第一子像素组包括至少一个子像素，所述第一发光单元出射光线的颜色包括所述第一子像素组的子像素出射光线的颜色，所述第一子像素组的子像素对应的所述像素定义层的所述侧面具有第一坡度角；所述第二子像素组包括至少一个子像素，所述第二发光单元出射光线的颜色包括所述第二子像素组的子像素出射光线的颜色，所述第二子像素组的子像素对应的所述像素定义层的所述侧面具有第二坡度角；所述第三子像素组包括至少一个子像素，所述第三发光单元出射光线的颜色包括所述第三子像素组的子像素出射光线的颜色，所述第三子像素组的子像素对应的所述像素定义层的所述侧面具有第三坡度角，所述第三坡度角大于所述第一坡度角，所述第二坡度角大于所述第一坡度角。
  8. 根据权利要求7所述的显示装置，其中，所述第三坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°，所述第二坡度角与所述第一坡度角的差值大于或等于10°小于或等于60°。
  9. 根据权利要求7所述的显示装置，其中，所述第一坡度角大于或等于30°小于或等于60°，所述第二坡度角大于60°小于或等于90°，所述第三坡度角大于60°小于或等于90°。
  10. 根据权利要求1所述的显示装置，其中，所述像素单元包括出射第一颜色光线的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第二发光单元出射光线的颜色包括所述第三颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°。
  11. 根据权利要求1所述的显示装置，其中，所述像素单元包括出射第一颜色光线的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述 第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第三颜色，所述第二发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于60°小于或等于90°，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于或等于30°小于或等于60°。
  12. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述电荷产生层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第一凹陷区域，所述第一凹陷区域靠近所述子像素中间区域的一端连接有第一平坦面，所述第一平坦面平行于所述基底，所述第一凹陷区域远离所述子像素中间区域的一端连接有第一凸起，所述第一凹陷区域远离所述第一平坦面的侧面的坡度角大于或等于30°小于或等于60°。
  13. 根据权利要求12所述的显示装置，其中，所述第一凹陷区域的最低点至所述第一平坦面的垂直距离大于或等于4埃小于或等于9埃。
  14. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述电荷产生层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第一凹陷区域，所述第一凹陷区域靠近所述子像素中间区域的一端连接有第一平坦面，所述第一平坦面平行于所述基底，所述第一凹陷区域远离所述子像素中间区域的一端连接有第一凸起，所述第一凹陷区域远离所述第一平坦面的侧面的坡度角大于60°小于或等于90°。
  15. 根据权利要求14所述的显示装置，其中，所述第一凹陷区域的最低点至所述第一平坦面的垂直距离大于9埃小于或等于14埃。
  16. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元包括第一发光层，所述第一发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第二凹陷区域，所 述第二凹陷区域靠近所述子像素中间区域的一端连接有第二平坦面，所述第二平坦面平行于所述基底，所述第二凹陷区域远离所述子像素中间区域的一端连接有第二凸起，所述第二凹陷区域远离所述第二平坦面的侧面的坡度角大于或等于30°小于或等于60°。
  17. 根据权利要求16所述的显示装置，其中，所述第二凹陷区域的最低点至所述第二平坦面的垂直距离大于或等于30埃小于或等于80埃。
  18. 根据权利要求16所述的显示装置，其中，所述第二凹陷区域的最低点至所述第二平坦面边缘的最小距离大于等于大于或等于30埃小于或等于100埃。
  19. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元包括第一发光层，所述第一发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第二凹陷区域，所述第二凹陷区域靠近所述子像素中间区域的一端连接有第二平坦面，所述第二平坦面平行于所述基底，所述第二凹陷区域远离所述子像素中间区域的一端连接有第二凸起，所述第二凹陷区域远离所述第二平坦面的侧面的坡度角大于60°小于或等于90°。
  20. 根据权利要求19所述的显示装置，其中，所述第二凹陷区域的最低点至所述第二平坦面的垂直距离大于80埃小于或等于120埃。
  21. 根据权利要求19所述的显示装置，其中，所述第二凹陷区域的最低点至所述第二平坦面的垂直距离大于100埃小于或等于300埃。
  22. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第二发光单元包括第二发光层，所述第二发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第三凹陷区域，所述第三凹陷区域靠近所述子像素中间区域的一端连接有第三平坦面，所述第三平坦面平行于所述基底，所述第三凹陷区域远离所述子像素中间区域的一端连接有第三凸起，所述第三凹陷区域远离所述第三平坦面的侧面的坡度角大于或等于30°小于或等于60°。
  23. 根据权利要求22所述的显示装置，其中，所述第三凹陷区域的最低点至所述第三平坦面的垂直距离大于或等于60埃小于或等于70埃。
  24. 根据权利要求22所述的显示装置，其中，所述第三凹陷区域的最低点至所述第 三平坦面边缘的最小距离大于等于100埃小于或等于300埃。
  25. 根据权利要求1至6任一所述的显示装置，其中，所述发光功能层包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第二发光单元包括第二发光层，所述第二发光层远离所述基底一侧的表面在所述像素定义层的所述侧面对应区域形成第三凹陷区域，所述第三凹陷区域靠近所述子像素中间区域的一端连接有第三平坦面，所述第三平坦面平行于所述基底，所述第三凹陷区域远离所述子像素中间区域的一端连接有第三凸起，所述第三凹陷区域远离所述第三平坦面的侧面的坡度角大于60°小于或等于90°。
  26. 根据权利要求25所述的显示装置，其中，所述第三凹陷区域的最低点至所述第三平坦面的垂直距离大于70埃小于或等于80埃。
  27. 根据权利要求25所述的显示装置，其中，所述第三凹陷区域的最低点至所述第三平坦面边缘的最小距离小于100埃。
  28. 根据权利要求1至11任一所述的显示装置，其中，所述像素定义层包括沿着远离所述基底方向依次层叠设置的第一定义层、第二定义层和第三定义层，所述第一定义层具有靠近所述像素开口的第一侧面，所述第二定义层具有靠近所述像素开口的第二侧面，所述第三定义层具有靠近所述像素开口的第三侧面，所述第一侧面与所述第一电极连接，所述第一侧面分别相较于所述第二侧面和所述第三侧面伸出，所述像素定义层的所述侧面包括所述第一侧面、所述第二侧面和所述第三侧面，所述第一侧面与所述基底所在平面之间形成的夹角形成所述像素定义层的所述侧面的坡度角。
  29. 根据权利要求28所述的显示装置，其中，所述第三侧面相较于所述第二侧面伸出，所述第三侧面与所述第二侧面形成底切结构，所述发光功能层中的至少部分膜层在所述底切结构处隔断。
  30. 根据权利要求1所述的显示装置，其中，所述第一电极包括沿着垂直于所述基底方向依次堆叠的第一导电层、第二导电层和第三导电层。
  31. 根据权利要求30所述的显示装置，其中，所述第一电极还包括设置在所述第二导电层与所述第三导电层之间的电极绝缘层，所述电极绝缘层中设置有过孔，所述第三导电层通过所述过孔与所述第二导电层连接。
  32. 根据权利要求31所述的显示装置，其中，所述像素单元包括出射第一颜色光线 的第一子像素、出射第二颜色光线的第二子像素和出射第三颜色光线的第三子像素，所述第三子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，大于所述第一子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，所述第一子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离，大于所述第二子像素的所述第一电极远离所述基底一侧表面至所述基底表面的垂直距离。
  33. 根据权利要求32所述的显示装置，其中，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第二发光单元出射光线的颜色包括所述第三颜色，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第一子像素对应的所述像素定义层的所述侧面的坡度角，所述第三子像素对应的所述像素定义层的所述侧面的坡度角大于所述第二子像素对应的所述像素定义层的所述侧面的坡度角；
    或者，所述第一子像素、所述第二子像素和所述第三子像素中的所述发光功能层均包括沿着远离所述基底方向依次堆叠的第一发光单元和第二发光单元，以及设置在所述第一发光单元和所述第二发光单元之间的电荷产生层；所述第一发光单元出射光线的颜色包括所述第三颜色，所述第二发光单元出射光线的颜色包括所述第一颜色和所述第二颜色，所述第一子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所述像素定义层的所述侧面的坡度角，所述第二子像素对应的所述像素定义层的所述侧面的坡度角大于所述第三子像素对应的所述像素定义层的所述侧面的坡度角。
  34. 根据权利要求32所述的显示装置，其中，所述第三子像素的所述第一电极的所述电极绝缘层的厚度，大于所述第一子像素的所述第一电极的所述电极绝缘层的厚度，所述第一子像素的所述第一电极的所述电极绝缘层的厚度，大于所述第二子像素的所述第一电极的所述电极绝缘层的厚度。
  35. 根据权利要求1至6任一所述的显示装置，其中，所述像素定义层设置有位于相邻像素开口之间的隔断槽。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102960066A (zh) * 2010-10-15 2013-03-06 松下电器产业株式会社 有机发光面板及其制造方法以及有机显示装置
CN102960067A (zh) * 2010-10-15 2013-03-06 松下电器产业株式会社 有机发光面板及其制造方法以及有机显示装置
CN116744731A (zh) * 2023-07-31 2023-09-12 京东方科技集团股份有限公司 一种显示面板及其制备方法、显示装置
CN117529156A (zh) * 2023-10-20 2024-02-06 京东方科技集团股份有限公司 一种显示面板、显示面板母板及显示装置
CN117596953A (zh) * 2024-01-03 2024-02-23 京东方科技集团股份有限公司 显示基板及其制备方法、显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102960066A (zh) * 2010-10-15 2013-03-06 松下电器产业株式会社 有机发光面板及其制造方法以及有机显示装置
CN102960067A (zh) * 2010-10-15 2013-03-06 松下电器产业株式会社 有机发光面板及其制造方法以及有机显示装置
CN116744731A (zh) * 2023-07-31 2023-09-12 京东方科技集团股份有限公司 一种显示面板及其制备方法、显示装置
CN117529156A (zh) * 2023-10-20 2024-02-06 京东方科技集团股份有限公司 一种显示面板、显示面板母板及显示装置
CN117596953A (zh) * 2024-01-03 2024-02-23 京东方科技集团股份有限公司 显示基板及其制备方法、显示装置

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