Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a substrate, a circuit layer and a plurality of light-emitting devices, the circuit layer is arranged on one side of the substrate, and the circuit layer comprises a plurality of pixel circuits; the light-emitting devices are arranged on the side, away from the substrate, of the circuit layer, and each light-emitting device comprises a first electrode, a light-emitting layer arranged on the side, away from the substrate, of the first electrode and a second electrode arranged on the side, away from the substrate, of the light-emitting layer, the at least one light-emitting device comprises at least two stacked light-emitting layers and a charge generation layer arranged between the two adjacent light-emitting layers, and the first electrode of the at least one light-emitting device and the charge generation layer are both connected with the pixel circuit.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to a display panel and display device. Background Technology

[0002] With the continuous development of technology, the application scenarios of display panels are becoming increasingly widespread. Display panels are commonly used in devices such as mobile phones, computers, televisions, and wearable devices. At the same time, the demand for functional diversity of display panels is also increasing, and display panels often need to have multiple display modes to adapt to different display needs. Summary of the Invention

[0003] This application provides a display panel and a display device.

[0004] In a first aspect, embodiments of this application provide a display panel, the display panel comprising: a substrate; a circuit layer disposed on one side of the substrate, the circuit layer including a plurality of pixel circuits; and a plurality of light-emitting devices disposed on the side of the circuit layer away from the substrate, the light-emitting devices including a first electrode, a light-emitting layer disposed on the side of the first electrode away from the substrate, and a second electrode disposed on the side of the light-emitting layer away from the substrate, wherein at least one light-emitting device includes at least two stacked light-emitting layers and a charge-generating layer disposed between two adjacent light-emitting layers, and the first electrode and the charge-generating layer of at least one light-emitting device are both connected to the pixel circuits.

[0005] Secondly, embodiments of this application provide a display device, which includes a display panel as described in the first aspect embodiment above.

[0006] This application provides a display panel including a substrate, a circuit layer, and multiple light-emitting devices. The circuit layer is disposed on one side of the substrate and includes multiple pixel circuits. Multiple light-emitting devices are disposed on the side of the circuit layer opposite to the substrate. The pixel circuits can be used to control and drive the light-emitting devices to emit light. Each light-emitting device includes a first electrode, a light-emitting layer disposed on the side of the first electrode opposite to the substrate, and a second electrode disposed on the side of the light-emitting layer opposite to the substrate. The pixel circuits can drive the light-emitting layer to emit light by controlling the voltage difference between the first electrode and the second electrode, thereby realizing the light emission of the light-emitting device.

[0007] By configuring at least one light-emitting device comprising at least two stacked light-emitting layers and a charge-generating layer disposed between two adjacent light-emitting layers, the light-emitting layers within a single light-emitting device can be connected in series via the charge-generating layer. By configuring both the first electrode and the charge-generating layer of the at least one light-emitting device to be connected to a pixel circuit, the pixel circuit can selectively control the light emission of each light-emitting layer in the light-emitting device with at least two light-emitting layers by controlling the voltage of the first electrode and the charge-generating layer. This allows the pixel circuit to control the light emission brightness and color, among other light emission characteristics, of the light-emitting device with at least two light-emitting layers. Consequently, the light-emitting device with at least two light-emitting layers can have at least two operating states, which facilitates the display panel to have multiple display modes and adapts to different display requirements. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 2 This is a schematic diagram of the arrangement of light-emitting devices provided in an embodiment of this application; Figure 3 This is a partial structural schematic diagram of a light-emitting device provided in an embodiment of this application; Figure 4 This is a partial cross-sectional view of a display panel provided in an embodiment of this application; Figure 5 This is a schematic diagram of the connection of a first type of circuit for a display panel provided in an embodiment of this application; Figure 6 This is a connection diagram of a first type of circuit for a display panel provided in another embodiment of this application; Figure 7 This is a partial cross-sectional view of a display panel provided in another embodiment of this application; Figure 8 This is a partial cross-sectional view of a display panel provided in another embodiment of this application; Figure 9 This is a schematic diagram of the connection of a second type of circuit for a display panel provided in an embodiment of this application; Figure 10 This is a partial cross-sectional view of a display panel provided in another embodiment of this application; Figure 11This is a schematic diagram of the connection of a third type of circuit for a display panel provided in an embodiment of this application; Figure 12 This is a partial cross-sectional view of a display panel provided in another embodiment of this application; Figure 13 This is a partial structural schematic diagram of a light-emitting device and a light extraction layer provided in an embodiment of this application; Figure 14 This is a partial cross-sectional view of a display panel provided in another embodiment of this application.

[0010] Explanation of reference numerals in the attached figures: 10-Display panel; 100 - Substrate; 200 - Circuit layer; 210 - Pixel circuit; 210a - First type of circuit; 210b - Second type of circuit; 210c - Third type of circuit; 211 - Transistor; 211a - Semiconductor; 211b - Gate; 211c - Source and drain; 212 - Storage capacitor; 212a - First electrode plate; 212b - Second electrode plate; 300 - Light-emitting device; 301 - Type I device; 302 - Type II device; 303 - Type III device; 300a - Red device; 300b - Green device; 300c - Blue device; 311 - First electrode; 312 - Light-emitting layer; 312a - First light-emitting layer; 312b - Second light-emitting layer; 312c - Third light-emitting layer; 312d - Fourth light-emitting layer; 3121 - Common layer; 3122 - Light-emitting material; 313 - Charge generation layer; 314 - Second electrode; 315 - Light extraction layer; 400 - Pixel definition layer; 410 - Pixel limiting section; 420 - Pixel opening; 430 - Connecting opening; 500-Separation Structure; 600 - Encapsulation layer; 610 - First inorganic encapsulation layer; 620 - Organic encapsulation layer; 630 - Second inorganic encapsulation layer; IL - Insulating layer; IL1 - First insulating layer; IL2 - Second insulating layer; IL3 - Third insulating layer; IL4 - Planarization layer; MD1 - Driver Module; MD2 - Data Writing Module; MD3 - Light Emitting Control Module; MD31 - First Light Emitting Control Module; MD32 - Second Light Emitting Control Module; MD33 - Third Light Emitting Control Module; MD4 - First Reset Module; MD5 - Second Reset Module; MD6 - Threshold Compensation Module; MD7 - Storage Module; MD8 - Bias Adjustment Module; M1 - Drive transistor; M2 - Data write transistor; M3 - First light-emitting control transistor; M4 - Second light-emitting control transistor; M5 - Third light-emitting control transistor; M6 - First reset transistor; M7 - Second reset transistor; M8 - Threshold compensation transistor; M9 - Bias adjustment transistor; PVDD - First power signal line; PVEE - Second power signal line; DATA - Data signal line; VREF1 - First reset signal line; VREF2 - Second reset signal line; DVH - Bias adjustment signal line; EMIT1 - First light emission control signal line; EMIT2 - Second light emission control signal line; SCAN1 - First scan signal line; SCAN2 - Second scan signal line; SCAN3 - Third scan signal line; AA - Display area; NA - Non-display area. Detailed Implementation

[0011] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples. In the drawings and the following description, at least some well-known structures and technologies are not shown in order to avoid causing unnecessary ambiguity to this application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0012] It should be noted that, unless otherwise stated, "a plurality of" in this document means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0013] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0014] With the continuous development of technology, the application scenarios of display panels are becoming increasingly widespread. Display panels are commonly used in devices such as mobile phones, computers, televisions, and wearable devices. At the same time, the demand for functional diversity of display panels is also increasing, and display panels often need to have multiple display modes to adapt to different display needs.

[0015] In related technologies, in order to enable a display panel to have multiple display modes, it is often necessary to make significant changes to the structure of the original display panel with a single display mode. However, after changing the structure of the original display panel, it is easy to affect the display effect of the display panel.

[0016] For example, in related technologies, a display panel can have a normal mode and an eye-protection mode. Compared with the normal mode, in the eye-protection mode, the blue light energy output by the display panel is reduced, which can effectively reduce eye fatigue when users view the display panel. To enable both normal and eye-protection modes, a light blue light-emitting device is often added to the existing display panel with red, green, and blue light-emitting devices. (The light blue light emitted by the light blue light-emitting device is lighter than that emitted by the blue light-emitting device, thus helping to reduce eye fatigue when users view the display panel.) However, adding a light blue light-emitting device to the display panel can affect the arrangement and size of other light-emitting devices (for example, the arrangement of the light blue light-emitting device can easily compress and reduce the size of the red and green light-emitting devices, making it difficult for individual red and green light-emitting devices to have a large size), thereby potentially reducing the overall display effect of the display panel.

[0017] To address the aforementioned technical problems, this application is provided. To better understand this application, the display panel and display device of embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of a display panel 10 provided in an embodiment of this application. Figure 2 This is a schematic diagram of the arrangement of a light-emitting device 300 provided in an embodiment of this application. Figure 3 This is a partial structural schematic diagram of a light-emitting device 300 provided in an embodiment of this application. Figure 4 This is a partial cross-sectional view of a display panel 10 provided in an embodiment of this application.

[0019] like Figures 1 to 4 As shown, this application embodiment provides a display panel 10, which includes: a substrate 100; a circuit layer 200 disposed on one side of the substrate 100, the circuit layer 200 including a plurality of pixel circuits 210; and a plurality of light-emitting devices 300 disposed on the side of the circuit layer 200 away from the substrate 100. Each light-emitting device 300 includes a first electrode 311, a light-emitting layer 312 disposed on the side of the first electrode 311 away from the substrate 100, and a second electrode 314 disposed on the side of the light-emitting layer 312 away from the substrate 100. At least one light-emitting device 300 includes at least two stacked light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312. The first electrode 311 and the charge-generating layer 313 of at least one light-emitting device 300 are both connected to the pixel circuits 210.

[0020] In some embodiments of this application, the display panel 10 provided in this application can be configured in various ways. For example, the display panel 10 provided in this application can be a display panel 10 that operates based on the display principle of Organic Light Emitting Diode (OLED). Optionally, the display panel 10 can have a display area AA and a non-display area NA surrounding the display area AA. The display panel 10 in the display area AA can be used for light emission display, and the display panel 10 in the non-display area NA can be used for arranging circuits or wiring.

[0021] An embodiment of this application provides a display panel 10 including a substrate 100, a circuit layer 200, and a plurality of light-emitting devices 300.

[0022] Optionally, the substrate 100 can be used to support the overlying film layer. Exemplarily, the substrate 100 may include one or more of glass and flexible substrates. The flexible substrate may be formed of any suitable insulating material having flexibility; for example, the flexible substrate may include one or more of polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyaryl compounds, and glass fiber reinforced plastics. The substrate 100 may also include other types, selected by those skilled in the art according to actual needs.

[0023] The circuit layer 200 is disposed on one side of the substrate 100. The circuit layer 200 includes a plurality of pixel circuits 210 and a plurality of light-emitting devices 300 are disposed on the side of the circuit layer 200 away from the substrate 100. The pixel circuits 210 can be used to control and drive the light-emitting devices 300 to emit light.

[0024] For example, both the pixel circuit 210 and the light-emitting device 300 can be located in the display area AA to realize the light-emitting display in the display area AA.

[0025] Optionally, among the multiple light-emitting devices 300, there may be at least two light-emitting devices 300 with different emission colors to facilitate color display of the display panel 10. For example, the light-emitting devices 300 may include a red device 300a for emitting red light, a blue device 300c for emitting blue light, and a green device 300b for emitting green light.

[0026] The light-emitting device 300 includes a first electrode 311, a light-emitting layer 312 disposed on the side of the first electrode 311 away from the substrate 100, and a second electrode 314 disposed on the side of the light-emitting layer 312 away from the substrate 100. The pixel circuit 210 can drive the light-emitting layer 312 to emit light by controlling the voltage difference between the first electrode 311 and the second electrode 314, so as to realize the light emission of the light-emitting device 300.

[0027] Optionally, the light-emitting layer 312 may include at least two stacked common layers 3121 and a light-emitting material 3122 disposed between two adjacent common layers 3121. For example, in the direction away from the substrate 100, the common layer 3121 on the side of the light-emitting material 3122 close to the substrate 100 may include a hole injection layer (HIL) and a hole transport layer (HTL) stacked sequentially; in the direction away from the substrate 100, the common layer 3121 on the side of the light-emitting material 3122 away from the substrate 100 may include an electron transport layer (ETL) and an electron injection layer (EIL) stacked sequentially.

[0028] Optionally, the light-emitting materials 3122 of the light-emitting devices 300 with different light-emitting colors may be different. For example, the light-emitting material 3122 of the red device 300a may include a red light-emitting material for emitting red light, the light-emitting material 3122 of the green device 300b may include a green light-emitting material for emitting green light, and the light-emitting material 3122 of the blue device 300c may include a blue light-emitting material for emitting blue light.

[0029] Optionally, the first electrodes 311 of each light-emitting device 300 can be spaced apart to facilitate relatively independent control of each light-emitting device 300. The second electrodes 314 of each light-emitting device 300 can be electrically connected to each other. For example, the second electrodes 314 of each light-emitting device 300 can be integrally formed, which facilitates the fabrication of the second electrodes 314 and also facilitates signal control of the second electrodes 314 in each light-emitting device 300. The light-emitting materials 3122 of each light-emitting device 300 can be spaced apart. The common layers 3121 of adjacent light-emitting devices 300 can be interconnected (e.g., the common layers 3121 of adjacent light-emitting devices 300 can be integrally formed), or the common layers 3121 of adjacent light-emitting devices 300 can be spaced apart to prevent lateral leakage between the common layers 3121 of adjacent light-emitting devices 300.

[0030] Optionally, the pixel circuit 210 may include a transistor 211, a storage capacitor 212, and connection traces for connecting the various devices. The transistor 211 may include a semiconductor 211a, a gate 211b, and a source / drain 211c. The storage capacitor 212 may include a first electrode 212a and a second electrode 212b.

[0031] Optionally, the pixel circuit 210 can be connected to the first electrode 311 to provide a driving signal to the first electrode 311, thereby controlling the voltage of the first electrode 311 to participate in driving the light emission of the light-emitting layer 312. For example, when the pixel circuit 210 provides a driving signal to the first electrode 311, the first electrode 311 can serve as the anode of the pixel electrode in the display panel 10, and the second electrode 314 can serve as the cathode of the pixel electrode in the display panel 10 to drive the light emission of the light-emitting layer 312.

[0032] Optionally, a single pixel circuit 210 can be configured to correspond to a single light-emitting device 300, that is, a single pixel circuit 210 can control and drive the light emission of a single light-emitting device 300.

[0033] Optionally, the transistor 211 can be configured in various ways. For example, the transistor 211 can be a thin film transistor (TFT). The semiconductor 211a can have a channel region and source / drain regions located on both sides of the channel region. The orthogonal projection of the gate 211b on the substrate 100 can at least partially overlap with the orthogonal projection of the channel region on the substrate 100. The source / drain regions can include a source region and a drain region, which are located on both sides of the channel region. The source / drain electrodes 211c can include a source electrode and a drain electrode, with the source electrode connected to the source region and the drain electrode connected to the drain electrode.

[0034] Optionally, the display panel 10 may also include a multilayer insulating layer IL disposed on the same side of the substrate 100 as the circuit layer 200. The various structures in the pixel circuit 210 can be separated by the respective insulating layers IL to facilitate the arrangement of the circuit layer 200.

[0035] As an example, in the direction away from the substrate 100, the insulating layer IL may include a first insulating layer IL1, a second insulating layer IL2, a third insulating layer IL3 and a planarization layer IL4 stacked sequentially. At least a portion of the semiconductor 211a of the transistor 211 may be disposed between the substrate 100 and the first insulating layer IL1. At least a portion of the gate 211b of the transistor 211 and the first electrode 212a of the storage capacitor 212 may be disposed between the first insulating layer IL1 and the second insulating layer IL2. At least a portion of the second substrate of the storage capacitor 212 may be disposed between the second insulating layer IL2 and the third insulating layer IL3. At least a portion of the source and drain electrodes 211c of the transistor 211 may be disposed between the third insulating layer IL3 and the planarization layer IL4.

[0036] Optionally, the materials of the first insulating layer IL1, the second insulating layer IL2 and the third insulating layer IL3 may include inorganic materials, and the material of the planarization layer IL4 may include organic materials. The planarization layer IL4 can be used to improve the flatness of the display panel 10.

[0037] By providing at least one light-emitting device 300 including at least two stacked light-emitting layers 312 and a charge generation layer (CGL) disposed between two adjacent light-emitting layers 312, the individual light-emitting layers 312 within a single light-emitting device 300 can be connected in series through the charge generation layer 313.

[0038] For example, the series-connected light-emitting layers 312 formed by the charge generation layer 313 can form a series-connected OLED (TandemOLED) structure. When the driving signal provided by the pixel circuit 210 to the first electrode 311 drives the light-emitting device 300 to emit light, the driving signal can sequentially excite each light-emitting layer 312 in the light-emitting device 300. This can significantly improve the overall brightness and light energy of the light-emitting device 300, and can better delay the material aging of the light-emitting layer 312, extend the device life, and at the same time help reduce the power consumption of the display panel 10, thereby improving the overall working performance of the display panel 10.

[0039] Optionally, the number of light-emitting layers 312 in the light-emitting device 300 can be determined based on the number of layers of light-emitting material 3122 in the light-emitting device 300. That is, the number of light-emitting layers 312 in the light-emitting device 300 can be determined by the number of layers of light-emitting material 3122 in the light-emitting device 300. For example, at least one light-emitting device 300 includes at least two stacked light-emitting layers 312, which can refer to at least one light-emitting device 300 including at least two layers of light-emitting material 3122 for emitting light, wherein the number of common layers 3121 located on both sides of the light-emitting material 3122 can be multiple. Therefore, a single light-emitting layer 312 can be composed of a single light-emitting material 3122 and common layers 3121 located on both sides of the single light-emitting material 3122 for participating in driving the light-emitting material 3122 to emit light.

[0040] Optionally, when the light-emitting device 300 includes a charge generation layer 313 and at least two stacked light-emitting layers 312, the charge generation layer 313 can be reused as a hole injection layer in the light-emitting layer 312 located on the side of it facing away from the substrate 100.

[0041] By connecting the first electrode 311 and charge generation layer 313 of at least one light-emitting device 300 to the pixel circuit 210, the pixel circuit 210 can selectively control the light emission of each light-emitting layer 312 in the light-emitting device 300 with at least two light-emitting layers 312 by controlling the voltage of the first electrode 311 and charge generation layer 313. This allows the pixel circuit 210 to control the light emission characteristics of the light-emitting device 300 with at least two light-emitting layers 312, such as brightness and color. As a result, the light-emitting device 300 with at least two light-emitting layers 312 can have at least two working states, which is beneficial for the display panel 10 to have multiple display modes and adapt to different display needs.

[0042] For example, when the pixel circuit 210 mainly provides a driving signal to the first electrode 311, the driving signal can excite all the light-emitting layers 312 located between the first electrode 311 and the second electrode 314 in the light-emitting device 300 to emit light through the first electrode 311 and the charge generation layer 313. In this working state (hereinafter referred to as the first state), the light-emitting device 300 can have a large luminous brightness, the light emitted by the light-emitting device 300 can have a large energy, and the color of the light emitted by the light-emitting device 300 can be the color produced by the superposition of the light emitted by each light-emitting layer 312 in the light-emitting device 300. However, when the pixel circuit 210 mainly provides a driving signal to the charge generation layer 313, the driving signal can drive the light-emitting layer 312 located between the charge generation layer 313 and the second electrode 314 to emit light, while the light-emitting layer 312 located between the first electrode 311 and the charge generation layer 313 cannot emit light normally. When the light-emitting device 300 includes at least three light-emitting layers 312 and at least two charge-generating layers 313, the light-emitting layer 312 located between the first electrode 311 and the charge-generating layer 313 cannot emit light normally. This can refer to the light-emitting layer 312 between the charge-generating layer 313 closest to the substrate 100 and the first electrode 311 in the light-emitting device 300 being unable to emit light normally. The inability of the light-emitting layer 312 to emit light normally can refer to the low brightness of the light-emitting layer 312 or the fact that the light-emitting layer 312 does not emit light. In this working state (hereinafter referred to as the second state), the brightness of the light-emitting device 300 may be relatively weak, the light emitted by the light-emitting device 300 may have low energy, and the color of the light emitted by the light-emitting device 300 may be the color produced by the superposition of the light emitted by the light-emitting layer 312 located between the charge-generating layer 313 and the second electrode 314 in the light-emitting device 300. Based on this, since the light-emitting device 300 can have at least two working states under the control of the pixel circuit 210, the display panel 10 can have at least two display modes, which is beneficial for the display panel 10 to adapt to different display needs.

[0043] In some embodiments of this application, in a light-emitting device 300 that includes at least two light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312, there are various ways to arrange the materials of the light-emitting layers 312 in the light-emitting device 300.

[0044] As an example, in a light-emitting device 300 comprising at least two light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312, the light-emitting material 3122 of each light-emitting layer 312 in the light-emitting device 300 may be the same (for example, the light-emitting material 3122 of each light-emitting layer 312 in the first type of device 301 described in the following embodiments may be the same), so that the color of the light emitted when each light-emitting layer 312 in the light-emitting device 300 is lit may be the same. The color of the light emitted by the light-emitting device 300 in the first state may be the same as the color of the light emitted by the light-emitting device 300 in the second state. The light-emitting device 300 in the first state and the light-emitting device 300 in the second state may only differ in luminous brightness and light intensity.

[0045] As another example, in a light-emitting device 300 comprising at least two light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312, the light-emitting materials 3122 of at least two light-emitting layers 312 in the light-emitting device 300 may be different (for example, the light-emitting materials 3122 of at least two light-emitting layers 312 in the first type of device 301 described in the later embodiments may be different), so that the color of the light emitted when at least two light-emitting layers 312 in the light-emitting device 300 are lit may be different, thereby making the color of the light emitted by the light-emitting device 300 in the first state different from the color of the light emitted by the light-emitting device 300 in the second state, and thus making the display panel 10 have different display effects in different display modes. For example, in the two light-emitting layers 312 of the light-emitting device 300 and the charge-generating layer 313 located between the two light-emitting layers 312, the light-emitting material 3122 of the light-emitting layer 312 located on the side of the charge-generating layer 313 close to the substrate 100 may be different from the light-emitting material 3122 of the light-emitting layer 312 located on the side of the charge-generating layer 313 away from the substrate 100, so that the color of the light emitted by the light-emitting device 300 in the first state may be different from the color of the light emitted by the light-emitting device 300 in the second state.

[0046] In the embodiments of this application, by setting at least one light-emitting device 300 with its first electrode 311 and charge generation layer 313 both connected to the pixel circuit 210, the display panel 10 can have multiple display modes, which also helps to improve the display effect of the display panel 10. For example, compared with the related technology of directly adding light-emitting devices 300 with different light emission colors, light emission intensities or light energy to achieve multiple display modes of the display panel 10, this application increases the number of light-emitting layers 312 in a single light-emitting device 300 and uses the pixel circuit 210 to selectively control the light emission of each light-emitting layer 312 in the light-emitting device 300. Therefore, the display panel 10 can have multiple display modes without increasing the types of light-emitting devices 300 in the display panel 10. This can better improve the arrangement size of each light-emitting device 300, which is beneficial to the arrangement of each light-emitting device 300 and also helps to improve the aperture ratio of the display panel 10, so that the display panel 10 can have a better overall display effect.

[0047] In some embodiments, the light-emitting device 300 includes a first type device 301, which includes at least two stacked light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312. The pixel circuit 210 includes a first type circuit 210a, which includes at least two control modules. In the interconnected first type device 301 and first type circuit 210a, the charge-generating layer 313 of the first type device 301 is electrically connected to one of the control modules in the first type circuit 210a, and the first electrode 311 of the first type device 301 is electrically connected to at least one of the control modules in the first type circuit 210a.

[0048] For example, the first type of device 301, under the control of the first type of circuit 210a, may have the aforementioned first state and second state.

[0049] In this embodiment, the first electrode 311 and the charge generation layer 313 in the first type of device 301 can receive drive signals via different control modules, thereby facilitating the control of the operating state of the first type of device 301. When the control module connected to the first electrode 311 in the first type of circuit 210a provides a drive signal to the first electrode 311 in the first type of device 301, the first type of device 301 can be in a first state. When the control module connected to the charge generation layer 313 in the first type of circuit 210a provides a drive signal to the charge generation layer 313 in the first type of device 301, the first type of device 301 can be in a second state.

[0050] Figure 5 This is a schematic diagram of the connection of a first type of circuit 210a of a display panel 10 provided in an embodiment of this application.

[0051] Please see Figure 4 and Figure 5 In some embodiments, the pixel circuit 210 includes a driving module MD1, a data writing module MD2, and a light emission control module MD3. The data writing module MD2 is used to write data voltage to the control terminal of the driving module MD1. The light emission control module MD3 of the first type circuit 210a includes a first light emission control module MD31 and a second light emission control module MD32. In the interconnected first type circuit 210a and first type device 301, the first light emission control module MD31 is connected to the first electrode 311, and the second light emission control module MD32 is connected to the charge generation layer 313. The driving module MD1 is used to provide driving signals to the first light emission control module MD31 and / or the second light emission control module MD32 according to the voltage of the control terminal.

[0052] For example, the driving module MD1 may include a driving transistor M1, and the data writing module MD2 may include a data writing transistor M2. The first light-emitting control module MD31 may include a first light-emitting control transistor M3, and the second light-emitting control module MD32 may include a second light-emitting control transistor M4. The first light-emitting control module MD31 is connected to the first electrode 311, which means that the first light-emitting control transistor M3 can be connected to the first electrode 311. The second light-emitting control module MD32 is connected to the charge generation layer 313, which means that the second light-emitting control transistor M4 can be connected to the charge generation layer 313.

[0053] Optionally, the first light-emitting control transistor M3 can be connected to the driving transistor M1, so that the driving module MD1 can be used to provide a driving signal to the first light-emitting control module MD31. For example, the first terminal of the first light-emitting control transistor M3 can be connected to the second terminal of the driving transistor M1.

[0054] Optionally, the second light-emitting control transistor M4 can be directly connected to the driving transistor M1, or the second light-emitting control transistor M4 can be indirectly connected to the driving transistor M1 through other transistors 211 (for example, in the embodiments described later, the second light-emitting control transistor M4 can be indirectly connected to the driving transistor M1 through the first light-emitting control transistor M3), so that the driving module MD1 can provide a driving signal to the second light-emitting control module MD32 through other transistors 211. For example, the first terminal of the second light-emitting control transistor M4 can be directly connected to the second terminal of the driving transistor M1, or the first terminal of the second light-emitting control transistor M4 can be indirectly connected to the second terminal of the driving transistor M1 through other transistors 211 (for example, in the embodiments described later, the first terminal of the second light-emitting control transistor M4 can be connected to the second terminal of the first light-emitting control transistor M3, so that the second light-emitting control transistor M4 is indirectly connected to the driving transistor M1 through other transistors 211).

[0055] Optionally, the first light-emitting control module MD31 or the second light-emitting control module MD32 may be the control modules described in the foregoing embodiments.

[0056] Optionally, the driving transistor M1, the data writing transistor M2, the first light-emitting control transistor M3, and the second light-emitting control transistor M4 may be the transistor 211 described in the foregoing embodiments.

[0057] In this embodiment, the driving module MD1 can be used to provide driving signals to the first light-emitting control module MD31 and the second light-emitting control module MD32, so that the first electrode 311 and the charge generation layer 313 in the first type of device 301 can receive driving signals through the first light-emitting control module MD31 and the second light-emitting control module MD32 respectively, thereby facilitating the control of the operating state of the first type of device 301. When the first light-emitting control module MD31 provides a driving signal to the first electrode 311 in the first type of device 301, the first type of device 301 can be in a first state. When the second light-emitting control module MD32 provides a driving signal to the charge generation layer 313 in the first type of device 301, the first type of device 301 can be in a second state.

[0058] In some embodiments, the circuit layer 200 further includes a first reset signal line VREF1, and the pixel circuit 210 further includes a first reset module MD4. The first end of the first reset module MD4 is connected to the first reset signal line VREF1. In the interconnected first type of circuit 210a and first type of device 301, the first end of the first light emission control module MD31 is connected to the driving module MD1. The first electrode 311, the second end of the first reset module MD4, the second end of the first light emission control module MD31 and the first end of the second light emission control module MD32 are interconnected. The second end of the second light emission control module MD32 is connected to the charge generation layer 313.

[0059] For example, the first reset module MD4 may include a first reset transistor M6. The first terminal of the first reset module MD4 is connected to the first reset signal line VREF1, meaning the first electrode of the first reset transistor M6 can be connected to the first reset signal line VREF1. The first reset signal line VREF1 can be used to provide a first reset signal to the first reset transistor M6. The first terminal of the first light-emitting control module MD31 is connected to the driving module MD1, meaning the first electrode of the first light-emitting control transistor M3 can be connected to the second electrode of the driving transistor M1. The first electrode 311, the second terminal of the first reset module MD4, the second terminal of the first light-emitting control module MD31, and the first terminal of the second light-emitting control module MD32 are interconnected, meaning the first electrode 311, the second electrode of the first reset transistor M6, the second electrode of the first light-emitting control transistor M3, and the first electrode of the second light-emitting control transistor M4 are interconnected. The second terminal of the second light-emitting control module MD32 is connected to the charge generation layer 313, meaning the second electrode of the second light-emitting control transistor M4 is connected to the charge generation layer 313.

[0060] Optionally, the first reset transistor M6 may be the transistor 211 described in the foregoing embodiments.

[0061] In this embodiment, by interconnecting the first electrode 311, the second terminal of the first reset module MD4, the second terminal of the first light-emitting control module MD31, and the first terminal of the second light-emitting control module MD32, the first reset signal line VREF1 can provide a first reset signal to the first electrode 311 through the first reset module MD4 to reset the first electrode 311. Furthermore, the first reset signal line VREF1 can also provide a first reset signal to the charge generation layer 313 through the first reset module MD4 and the second light-emitting control module MD32 to reset the charge generation layer 313. Since the first reset module MD4 can participate in the reset of the first electrode 311 and the charge generation layer 313, the pixel circuit 210 does not need to add a new module to achieve separate reset of the charge generation layer 313. This significantly reduces the complexity and space occupied by the pixel circuit 210, facilitating the fabrication of the display panel 10 and simplifying the control of the pixel circuit 210.

[0062] For example, when the first reset transistor M6 is turned on, the first light-emitting control transistor M3 and the second light-emitting control transistor M4 can both be turned off, so that the first reset signal line VREF1 can provide the first reset signal to the first electrode 311 relatively independently, so as to better realize the reset of the first electrode 311; when the first reset transistor M6 is turned on, the first light-emitting control transistor M3 can be turned off, and the second light-emitting control transistor M4 can be turned on, so that the first reset signal line VREF1 can provide the first reset signal to the charge generation layer 313, so as to realize the reset of the charge generation layer 313.

[0063] Furthermore, in this embodiment, in the interconnected first type of circuit 210a and first type of device 301, the second light-emitting control module MD32 is indirectly connected to the driving module MD1 through the first light-emitting control module MD31. Therefore, in the first state, in the interconnected first type of circuit 210a and first type of device 301, the driving signal can be transmitted to the first electrode 311 through the first light-emitting control module MD31 to drive the light emission of all light-emitting layers 312 located between the first electrode 311 and the second electrode 314 in the first type of device 301; in the second state, in the interconnected first type of circuit 210a and first type of device 301, the driving signal can be transmitted to the charge generation layer 313 through the first light-emitting control module MD31 and the second light-emitting control module MD32 to drive the light emission of the light-emitting layers 312 located between the charge generation layer 313 and the second electrode 314 in the first type of device 301.

[0064] For example, in the first state, in the interconnected first type of circuit 210a and first type of device 301, the first light-emitting control transistor M3 can be in the on state, and the second light-emitting control transistor M4 can be in the off state, so that the driving signal can be transmitted directly to the first electrode 311 mainly through the first light-emitting control transistor M3 to drive the light emission of all light-emitting layers 312 located between the first electrode 311 and the second electrode 314 in the first type of device 301; in the second state, in the interconnected first type of circuit 210a and first type of device 301, both the first light-emitting control transistor M3 and the second light-emitting control transistor M4 can be in the on state, so that the driving signal can be transmitted to the charge generation layer 313 mainly through the first light-emitting control transistor M3 and the second light-emitting control transistor M4 in sequence to drive the light emission of the light-emitting layers 312 located between the charge generation layer 313 and the second electrode 314 in the first type of device 301.

[0065] In some embodiments, the circuit layer 200 further includes a first scan signal line SCAN1, a first light emission control signal line EMIT1, and a second light emission control signal line EMIT2. The control terminal of the first reset module MD4 is connected to the first scan signal line SCAN1. In the interconnected first type of circuit 210a and first type of device 301, the control terminal of the first light emission control module MD31 is connected to the first light emission control signal line EMIT1, and the control terminal of the second light emission control module MD32 is connected to the second light emission control signal line EMIT2.

[0066] For example, the control terminal of the first reset module MD4 is connected to the first scan signal line SCAN1, which can mean that the gate 211b of the first reset transistor M6 is connected to the first scan signal line SCAN1. The control terminal of the first light-emitting control module MD31 is connected to the first light-emitting control signal line EMIT1, which can mean that the gate 211b of the first light-emitting control transistor M3 is connected to the first light-emitting control signal line EMIT1. The control terminal of the second light-emitting control module MD32 is connected to the second light-emitting control signal line EMIT2, which can mean that the gate 211b of the second light-emitting control transistor M4 is connected to the second light-emitting control signal line EMIT2.

[0067] In this embodiment, the first scan signal line SCAN1 can be used to provide a first scan signal to the first reset module MD4 to control the on / off state of devices (e.g., the first reset transistor M6) within the first reset module MD4, thereby controlling whether the first reset signal can be transmitted via the first reset module MD4. The first light emission control signal line EMIT1 can be used to provide a first light emission control signal to the first light emission control module MD31 to control the on / off state of devices (e.g., the first light emission control transistor M3) within the first light emission control module MD31, thereby controlling whether the drive signal can be transmitted via the first light emission control module MD31. The second light emission control signal line EMIT2 can be used to provide a second light emission control signal to the second light emission control module MD32 to control the on / off state of devices (e.g., the second light emission control transistor M4) within the second light emission control module MD32, thereby controlling whether the drive signal and the first reset signal can be transmitted via the second light emission control module MD32.

[0068] In the embodiments of this application, the pixel circuit 210 can be configured in various ways. The pixel circuit 210 may also include modules other than the aforementioned modules to further improve the control and driving effect of the pixel circuit 210.

[0069] Optionally, the first type of circuit 210a may include a basic circuit and the second light-emitting control module MD32 described in the foregoing embodiments. That is, the first type of circuit 210a provided in this application embodiment may be based on a relatively conventional basic circuit with the addition of the second light-emitting control module MD32 described in the foregoing embodiments. This allows the first type of circuit 210a to satisfy the basic control of the first type of device 301 (i.e., the first type of circuit 210a can satisfy the control of the first type of device 301 in the first state) and also to satisfy the relatively independent control of the potential of the charge generation layer 313 in the first type of device 301 to control the first type of device 301 in the second state.

[0070] For example, the basic circuit can be a 2T1C, 4T1C, 7T1C, 7T2C, 8T1C, 8T2C, or other circuit structures. The basic circuit may include the driving module MD1, data writing module MD2, first light emission control module MD31, and first reset module MD4 described in the foregoing embodiments.

[0071] In some embodiments, the first type of circuit 210a may further include (for example, the basic circuit in the first type of circuit 210a may further include) a third light-emitting control module MD33, a second reset module MD5, a threshold compensation module MD6, and a storage module MD7. For example, the third light-emitting control module MD33 may include a third light-emitting control transistor M5, the second reset module MD5 may include a second reset transistor M7, the threshold compensation module MD6 may include a threshold compensation transistor M8, and the storage module MD7 may include a storage capacitor 212.

[0072] The circuit layer 200 may also include a first power signal line PVDD, a second power signal line PVEE, a data signal line DATA, a second reset signal line VREF2, a second scan signal line SCAN2, and a third scan signal line SCAN3.

[0073] Optionally, based on the aforementioned structure of the first type of circuit 210a, in the interconnected first type of circuit 210a and first type of device 301, the first terminal of the third light-emitting control transistor M5 can be electrically connected to the second plate 212b of the storage capacitor 212, and both the first terminal of the third light-emitting control transistor M5 and the second plate 212b of the storage capacitor 212 can be electrically connected to the first power supply signal line PVDD. The first power supply voltage signal line can be used to provide a positive power supply voltage signal to the third light-emitting control transistor M5 and the storage capacitor 212. The first terminal of the data writing transistor M2 is electrically connected to the data signal line DATA, and the data signal line DATA can provide a data signal to the data writing transistor M2. The second terminals of the data writing transistor M2, the third light-emitting control transistor M5, and the first terminal of the driving transistor M1 can be electrically connected to each other. The second terminal of the driving transistor M1, the first terminal of the threshold compensation transistor M8, and the first terminal of the first light-emitting control transistor M3 are electrically connected to each other. The second terminal of the threshold compensation transistor M8, the gate 211b of the driving transistor M1, the second terminal of the second reset transistor M7, and the first plate 212a of the storage capacitor 212 can be electrically connected to each other. The first terminal of the second reset transistor M7 is electrically connected to the second reset signal line VREF2, which can provide a second reset signal to the second reset transistor M7. The second power supply signal line PVEE can be connected to the second electrode 314 of the first type of device 301, and can be used to provide a negative power supply voltage signal to the first type of device 301.

[0074] The gates 211b of the first light-emitting control transistor M3 and the third light-emitting control transistor M5 are electrically connected to each other, and the gates 211b of both the first light-emitting control transistor M3 and the third light-emitting control transistor M5 can be connected to the first light-emitting control signal line EMIT1. The first light-emitting control signal line EMIT1 can be used to provide a first light-emitting control signal to the first light-emitting control transistor M3 and the third light-emitting control transistor M5 to simultaneously control the conduction and shutdown of the first light-emitting control transistor M3 and the third light-emitting control transistor M5. The second scan signal line SCAN2 can be connected to the gate 211b of the second reset transistor M7. The second scan signal line SCAN2 can be used to provide a second scan signal to the second reset transistor M7 to control the conduction and shutdown of the second reset transistor M7. The third scan signal line SCAN3 can be connected to the gates 211b of the threshold compensation transistor M8 and the data writing transistor M2. The third scan signal line SCAN3 can be used to provide a third scan signal to the threshold compensation transistor M8 and the data writing transistor M2 to control the conduction and shutdown of the threshold compensation transistor M8 and the data writing transistor M2.

[0075] Figure 6 This is a connection diagram of a first type of circuit 210a of a display panel 10 provided in another embodiment of this application.

[0076] like Figure 6 As shown, optionally, the first type of circuit 210a may also include (for example, the basic circuit in the first type of circuit 210a may also include) a bias adjustment module MD8. Exemplarily, the bias adjustment module MD8 may include a bias adjustment transistor M9.

[0077] Circuit layer 200 may also include a bias adjustment signal line DVH.

[0078] Optionally, in the interconnected first type of circuit 210a and first type of device 301, the bias adjustment signal line DVH can be connected to the first terminal of the bias adjustment transistor M9, and the bias adjustment signal line DVH can be used to provide a bias signal to the bias adjustment transistor M9. The second terminal of the bias adjustment transistor M9, the second terminal of the data writing transistor M2, the second terminal of the third light-emitting control transistor M5, and the first terminal of the driving transistor M1 can be electrically connected to each other. The first scan signal line SCAN1 can be connected to the gate 211b of the bias adjustment transistor M9, and the first scan signal line SCAN1 can be used to provide a first scan signal to the bias adjustment transistor M9 to control the conduction and shutdown of the bias adjustment transistor M9.

[0079] Optionally, the semiconductor 211a structure of the transistor 211 described in the foregoing embodiments of this application can be configured in various ways. For example, the semiconductor 211a structure of the driving transistor M1, data writing transistor M2, first light-emitting control transistor M3, second light-emitting control transistor M4, third light-emitting control transistor M5, first reset transistor M6, second reset transistor M7, threshold compensation transistor M8, and bias adjustment transistor M9 described in the foregoing embodiments of this application can be N-type or P-type, and this application does not limit it.

[0080] Optionally, the transistor 211 described in the foregoing embodiments of this application may be a single-gate 211b structure (i.e., the number of gates 211b in a single transistor 211 may be one) or a dual-gate 211b structure (i.e., the number of gates 211b in a single transistor 211 may be two). As an embodiment, in the first type of circuit 210a, except for the second reset transistor M7 and the threshold compensation transistor M8 which are dual-gate 211b structures, the remaining transistors 211 may be single-gate 211b structures.

[0081] Optionally, in the foregoing embodiments, one of the first and second electrodes of transistor 211 may refer to the source of transistor 211, and the other may refer to the drain of transistor 211.

[0082] In some embodiments of this application, the arrangement of the first type of device 301 can facilitate the display panel 10 to have multiple display modes with different display effects.

[0083] For example, the arrangement of the first type of device 301 can facilitate the display panel 10 to have different brightness display modes. Specifically, when the first type of device 301 is in a first state, the display panel 10 can be in a high-brightness display mode; while when the first type of device 301 is in a second state, the display panel 10 can be in a low-brightness display mode. The light-emitting material 3122 of each light-emitting layer 312 in the first type of device 301 can be the same, so that the first type of device 301 in the first state and the first type of device 301 in the second state can differ only in luminous brightness and light intensity.

[0084] For example, the arrangement of the first type of device 301 can facilitate the realization of display modes with different color effects for the display panel 10. Specifically, the light-emitting materials 3122 of at least two light-emitting layers 312 in the first type of device 301 can be different, so that the light emission color of the first type of device 301 in the first state can be different from the light emission color of the first type of device 301 in the second state. That is, when the first type of device 301 is in the first state, the display panel 10 can be in the first color display mode; and when the first type of device 301 is in the second state, the display panel 10 can be in the second color display mode. The display panel 10 in the first color display mode can have a certain color difference from the display panel 10 in the second color display mode.

[0085] Figure 7 This is a partial cross-sectional view of a display panel 10 provided in another embodiment of this application.

[0086] like Figure 7 As shown, in some embodiments, at least a portion of the common layer 3121 in at least two first-type devices 301 is integrally formed, so that the common layer 3121 in at least two first-type devices 301 can be formed in the same preparation step. Since the integrally formed common layer 3121 can have a larger size, it can help reduce the difficulty of preparing the common layer 3121 in the first-type devices 301.

[0087] For example, the light-emitting layer 312 of the first type of device 301 includes a first light-emitting layer 312a located on the side of the charge-generating layer 313 close to the substrate 100 and a second light-emitting layer 312b located on the side of the charge-generating layer 313 away from the substrate 100, wherein the common layer 3121 of the first light-emitting layers 312a in at least two first type of devices 301 is spaced apart; and / or the common layer 3121 of the second light-emitting layers 312b in at least two first type of devices 301 is integrally formed.

[0088] In a further example, the hole injection layers of the first light-emitting layers 312a in at least two first-type devices 301 are spaced apart, the hole transport layers of the first light-emitting layers 312a in at least two first-type devices 301 are spaced apart, the electron transport layers of the first light-emitting layers 312a in at least two first-type devices 301 are spaced apart, and the electron injection layers of the first light-emitting layers 312a in at least two first-type devices 301 are spaced apart; the hole transport layers of the second light-emitting layers 312b in at least two first-type devices 301 are integrally formed, the electron transport layers of the second light-emitting layers 312b in at least two first-type devices 301 are integrally formed, and the electron injection layers of the second light-emitting layers 312b in at least two first-type devices 301 are integrally formed.

[0089] In the embodiments of this application, by integrally forming the common layer 3121 of the second light-emitting layer 312b in at least two first-type devices 301, the fabrication efficiency of the common layer 3121 in the second light-emitting layer 312b can be improved and the fabrication difficulty of the common layer 3121 in the second light-emitting layer 312b can be reduced. By setting the common layer 3121 of the first light-emitting layer 312a in at least two first-type devices 301 at intervals, the common layer 3121 of the first light-emitting layer 312a on the side of the first-type device 301 closer to the circuit layer 200 is less likely to block the connection between the charge generation layer 313 above the first light-emitting layer 312a and the pixel circuit 210 in the circuit layer 200. This means that the charge generation layer 313 in the first-type device 301 can be connected to the pixel circuit 210 in the circuit layer 200 through the spacing between the common layers 3121 of the first light-emitting layer 312a in adjacent first-type devices 301.

[0090] Figure 8 This is a partial cross-sectional view of a display panel 10 provided in another embodiment of this application.

[0091] like Figure 7 and Figure 8 As shown, in some embodiments, the charge generation layers 313 of at least two first-type devices 301 are integrally formed; and / or, the charge generation layers 313 of at least two first-type devices 301 are spaced apart.

[0092] For example, when the first type of device 301 includes a blue device 300c, the charge generation layers 313 of at least two blue devices 300c are integrally formed; or the charge generation layers 313 of at least two blue devices 300c are spaced apart (not shown in the figure).

[0093] By integrally molding the charge generation layers 313 of at least two first-type devices 301, the charge generation layers 313 in the at least two first-type devices 301 can be fabricated in the same fabrication step. Furthermore, since the integrally molded charge generation layer 313 can have a larger size, it helps to reduce the fabrication difficulty of the charge generation layer 313 in the first-type devices 301. By spacing the charge generation layers 313 of the at least two first-type devices 301, lateral leakage current is less likely to occur between adjacent first-type devices 301 through the charge generation layers 313, thereby significantly improving the operational stability of the display panel 10.

[0094] Optionally, the charge generation layer 313 of the first type of device 301 with the same emission color is integrally formed; and / or, the charge generation layers 313 of the first type of device 301 with different emission colors are spaced apart.

[0095] For example, when the first type of device 301 includes a blue device 300c, a red device 300a, and a green device 300b, the charge generation layers 313 of at least two blue devices 300c are integrally formed, the charge generation layers 313 of at least two red devices 300a are integrally formed, the charge generation layers 313 of at least two green devices 300b are integrally formed, the charge generation layers 313 of adjacent blue devices 300c and red devices 300a are spaced apart, the charge generation layers 313 of adjacent blue devices 300c and green devices 300b are spaced apart, and the charge generation layers 313 of adjacent green devices 300b and red devices 300a are spaced apart.

[0096] By integrally molding the charge generation layer 313 of the first type of devices 301 with the same emitting color, the manufacturing efficiency of the display panel 10 can be improved, and the manufacturing difficulty of the display panel 10 can be reduced. Furthermore, since the first type of devices 301 integrally molded with the charge generation layer 313 have the same color, the impact on the overall display effect of the display panel 10 is minimal when lateral leakage occurs between adjacent first type of devices 301 through the charge generation layer 313. By setting a spacing between the charge generation layers 313 of the first type of devices 301 with different emitting colors, lateral leakage is less likely to occur between adjacent first type of devices 301 with different emitting colors through the charge generation layer 313. This makes it less likely that other first type of devices 301 of different colors located around it will be accidentally lit when one first type of device 301 is lit, thereby significantly improving the overall display effect of the display panel 10.

[0097] In some embodiments of this application, the red device 300a, green device 300b, and blue device 300c can be configured in various ways, so that the display panel 10 can have different display modes and working effects.

[0098] like Figure 8 As shown, in some embodiments, the first type of device 301 may include a blue device 300c, that is, the blue device 300c may include at least two light-emitting layers 312 and a charge-generating layer 313 disposed between the two light-emitting layers 312, and the blue device 300c may have the aforementioned first state and second state.

[0099] By including a blue device 300c in the first type of device 301, the blue device 300c can have both a first state and a second state. When the blue device 300c is in the first state, it emits a higher intensity of blue light, which helps the display panel 10 present a blue image with superior display quality, thus facilitating the display of the display panel 10 in normal mode. Conversely, when the blue device 300c is in the second state, it emits a lower intensity of blue light, which helps reduce eye strain when viewing the display panel 10, thus facilitating the operation of the display panel 10 in eye-care mode. Therefore, by including the blue device 300c in the first type of device 301, the display panel 10 can have both a normal mode and an eye-care mode, allowing it to adapt to different user needs.

[0100] Optionally, in the blue device 300c, the light-emitting materials 3122 of at least two light-emitting layers 312 are different, so that the color of the light emitted by the blue device 300c in the first state and the second state may be different. This is beneficial to further improve the difference between the display effect of the display panel 10 in eye protection mode and the display effect of the display panel 10 in normal mode, and thus further reduce the eye fatigue of users when viewing the display panel 10.

[0101] For example, the light-emitting layer 312 of the first type of device 301 includes a first light-emitting layer 312a located on the side of the charge generation layer 313 close to the substrate 100 and a second light-emitting layer 312b located on the side of the charge generation layer 313 away from the substrate 100. The light-emitting material 3122 of the first light-emitting layer 312a of the blue device 300c includes a dark blue light-emitting material, and the light-emitting material 3122 of the second light-emitting layer 312b of the blue device 300c includes a light blue light-emitting material; and / or, the maximum wavelength of light emitted when the first light-emitting layer 312a of the blue device 300c emits light is greater than the maximum wavelength of light emitted when the second light-emitting layer 312b of the blue device 300c emits light.

[0102] In this example, when the blue device 300c is in the first state, the first light-emitting layer 312a and the second light-emitting layer 312b can emit light together under the action of the first electrode 311 and the second electrode 314. At this time, the light emitted by the blue device 300c can be a deep blue overall, which is beneficial for the display panel 10 to present a blue picture with better display effect. When the blue device 300c is in the second state, the first light-emitting layer 312a in the blue device 300c cannot emit light normally, and the second light-emitting layer 312b can emit light in light blue or blue light with a lower wavelength under the action of the charge generation layer 313 and the second electrode 314, which helps to reduce eye fatigue when users look at the display panel 10.

[0103] like Figure 8 As shown, in some embodiments, the first type of device 301 includes at least one of a red device 300a and a green device 300b, that is, at least one of the red device 300a and the green device 300b may include at least two light-emitting layers 312 and a charge-generating layer 313 disposed between the two light-emitting layers 312, and has the aforementioned first state and second state.

[0104] By configuring the display panel 10 with a large number of light-emitting devices 300 as first-type devices 301, the display panel 10 can exhibit more obvious display differences in different display modes, which helps the display panel 10 adapt to different display needs. For example, when the first-type devices 301 include blue devices 300c, red devices 300a, and green devices 300b, during the operation of the display panel 10, if each of the first-type devices 301 is in a first state during the light-emitting process, the display panel 10 can be displayed in a display mode with higher brightness; if each of the first-type devices 301 is in a second state during the light-emitting process, the display panel 10 can be displayed in a display mode with lower brightness.

[0105] Figure 9 This is a connection diagram of the second type of circuit 210b of a display panel 10 provided in an embodiment of this application. Figure 10 This is a partial cross-sectional view of a display panel 10 provided in another embodiment of this application.

[0106] like Figure 9 and Figure 10 As shown, in some embodiments, the light-emitting device 300 further includes a second type of device 302, which includes only one light-emitting layer 312.

[0107] For example, the second type of device 302 includes only one light-emitting layer 312, which means that the second type of device 302 may include only one layer of light-emitting material 3122. The single layer of light-emitting material 3122 and the common layer 3121 located on both sides of the light-emitting material 3122 for participating in driving the light-emitting material 3122 to emit light can together form a single light-emitting layer 312.

[0108] Optionally, the charge generation layer 313 may not be included in the second type of device 302.

[0109] Optionally, based on the structural differences between the first type of device 301 and the second type of device 302, the first type of device 301 and the second type of device 302 can be controlled and driven by different types of pixel circuits 210. For example, the pixel circuit 210 may also include a second type of circuit 210b, which can be connected to the second type of device 302 to control the light-emitting operation of the second type of device 302.

[0110] Optionally, the second type of circuit 210b may include the basic circuit of the first type of circuit 210a described in any of the foregoing embodiments, that is, the second type of circuit 210b may include all the device structures of the first type of circuit 210a except for the second light-emitting control module MD32.

[0111] For example, the second type of circuit 210b may include the driving transistor M1, data writing transistor M2, first light-emitting control transistor M3, third light-emitting control transistor M5, first reset transistor M6, second reset transistor M7, threshold compensation transistor M8, and bias adjustment transistor M9 described in the foregoing embodiments. The connection method between the transistors 211 in the second type of circuit 210b may be the same as the connection method of the transistors 211 in the foregoing first type of circuit 210a. The connection between the second type of circuit 210b and the second type of device 302 may refer to the second electrode of the first reset transistor M6 and the second electrode of the first light-emitting control transistor M3 in the second type of circuit 210b being connected to the first electrode 311 of the second type of device 302.

[0112] In the embodiments of this application, by setting some of the light-emitting devices 300 as second-type devices 302, the control difficulty of the display panel 10's display operation can be reduced. Furthermore, compared to the first-type circuit 210a connected to the first-type device 301, the structure of the second-type circuit 210b connected to the second-type device 302 is simpler. Therefore, the space occupied by the pixel circuit 210 in the circuit layer 200 can be reduced, which is beneficial for the arrangement of various device structures in the circuit layer 200. Moreover, since the structure of the second-type device 302 is simpler than that of the first-type device 301, the fabrication complexity of the second-type device 302 is lower, which helps to reduce the fabrication difficulty of the display panel 10 and can significantly improve the fabrication efficiency of the display panel 10.

[0113] In some embodiments, a portion of the red device 300a, green device 300b, and blue device 300c may be a first type of device 301, and another portion may be a second type of device 302.

[0114] For example, the first type of device 301 may include a blue device 300c, and the second type of device 302 may include at least one of a red device 300a and a green device 300b. In this example, by including the blue device 300c in the first type of device 301, it is beneficial to enable the display panel 10 to have a normal mode and an eye protection mode. By including the red device 300a and the green device 300b in the second type of device 302, the space occupied by the pixel circuit 210 connected to the red device 300a and the green device 300b can be reduced, and the fabrication of the red device 300a and the green device 300b can be facilitated.

[0115] In some embodiments, when the light-emitting device 300 includes a first type of device 301 and a second type of device 302, the common layer 3121 of the first type of device 301 and the common layer 3121 of the second type of device 302 are at least partially integrally formed; and / or, at least a portion of the common layer 3121 of at least two second type of devices 302 are integrally formed.

[0116] For example, the common layer 3121 of the second light-emitting layer 312b in the first type of device 301 and the common layer 3121 of the second type of device 302 are at least partially integrally formed. Specifically, the hole transport layer of the second light-emitting layer 312b in the first type of device 301 can be integrally formed with the hole transport layer in the second type of device 302, the electron transport layer of the second light-emitting layer 312b in the first type of device 301 can be integrally formed with the electron transport layer in the second type of device 302, and the electron injection layer of the second light-emitting layer 312b in the first type of device 301 can be integrally formed with the electron injection layer in the second type of device 302.

[0117] For example, at least two hole injection layers in the second type of device 302 are integrally formed, at least two hole transport layers in the second type of device 302 are integrally formed, at least two electron transport layers in the second type of device 302 are integrally formed, and at least two electron injection layers in the second type of device 302 are integrally formed.

[0118] In the embodiments of this application, by at least partially integrating the common layer 3121 of the first type of device 301 with the common layer 3121 of the second type of device 302, the fabrication of at least part of the common layer 3121 in the first type of device 301 can be completed simultaneously when fabricating the common layer 3121 of the second type of device 302. This improves the fabrication efficiency of the display panel 10 and reduces the fabrication difficulty of the display panel 10. By integrating at least part of the common layer 3121 in at least two second type of devices 302, the common layer 3121 in different second type of devices 302 can also be fabricated in the same fabrication step, thereby improving the fabrication efficiency of the display panel 10 and reducing the fabrication difficulty of the display panel 10.

[0119] Figure 11 This is a connection diagram of the third type of circuit 210c of a display panel 10 provided in an embodiment of this application. Figure 12 This is a partial cross-sectional view of a display panel 10 provided in another embodiment of this application.

[0120] like Figure 11 and Figure 12 As shown, in some embodiments, the light-emitting device 300 includes a third type of device 303, which includes at least two stacked light-emitting layers 312 and a charge-generating layer 313 disposed between two adjacent light-emitting layers 312. The charge-generating layer 313 of the third type of device 303 is electrically connected to the pixel circuit 210 only through the first electrode 311.

[0121] Optionally, the charge generation layer 313 of the third type device 303 is electrically connected to the pixel circuit 210 only through the first electrode 311. This can mean that the charge generation layer 313 in the third type device 303 is not directly connected to the device structure in the pixel circuit 210. That is, the driving signal transmitted from the pixel circuit 210 to the third type device 303 needs to be transmitted to the charge generation layer 313 through the first electrode 311.

[0122] Optionally, given the difference between the connection methods of the first type of device 301 and the pixel circuit 210 and the connection methods of the third type of device 303 and the pixel circuit 210, the first type of device 301 and the third type of device 303 can be controlled and driven by different types of pixel circuits 210. For example, the pixel circuit 210 may further include a third type of circuit 210c, which can be connected to the third type of device 303 to control the light-emitting operation of the third type of device 303.

[0123] Optionally, the third type of circuit 210c may include the basic circuit in the third type of circuit 210c described in any of the foregoing embodiments, that is, the third type of circuit 210c may include all the device structures in the first type of circuit 210a except for the second light-emitting control module MD32.

[0124] For example, the third type of circuit 210c may include the driving transistor M1, data writing transistor M2, first light-emitting control transistor M3, third light-emitting control transistor M5, first reset transistor M6, second reset transistor M7, threshold compensation transistor M8, and bias adjustment transistor M9 described in the foregoing embodiments. The connection method between the transistors in the third type of circuit 210c can be the same as the connection method of the transistors 211 in the foregoing first type of circuit 210a. The connection between the third type of circuit 210c and the third type of device 303 may refer to the second electrode of the first reset transistor M6 and the second electrode of the first light-emitting control transistor M3 in the third type of circuit 210c being connected to the first electrode 311 of the third type of device 303.

[0125] Optionally, the structure of the third type of circuit 210c can be the same as that of the second type of circuit 210b.

[0126] In the embodiments of this application, by setting some of the light-emitting devices 300 as third-type devices 303, the difficulty of controlling the display operation of the display panel 10 can be reduced. Furthermore, compared to the first-type circuit 210a connected to the first-type device 301, the structure of the third-type circuit 210c connected to the third-type device 303 is simpler. Therefore, the space occupied by the pixel circuit 210 in the circuit layer 200 can be reduced, which is beneficial for the arrangement of various device structures in the circuit layer 200. Moreover, since the third-type device 303 can also form a series OLED structure, it can have better luminous brightness and light energy when emitting light, and has a better device lifespan. It also helps to reduce the power consumption of the display panel 10, thereby improving the overall performance of the display panel 10.

[0127] In some embodiments, a portion of the red device 300a, green device 300b, and blue device 300c may be a first-type device 301, and another portion may be a third-type device 303.

[0128] For example, the first type of device 301 includes a blue device 300c, and the third type of device 303 includes at least one of a red device 300a and a green device 300b. In this example, by setting the first type of device 301 to include a blue device 300c, it is beneficial to enable the display panel 10 to have a normal mode and an eye protection mode. By setting the third type of device 303 to include red devices 300a and 300c and green devices 300b, the red devices 300a and 300b can have better luminous intensity and device lifespan, while also reducing the space occupied by the pixel circuit 210 connected to the red devices 300a and 300b.

[0129] In some embodiments, when the light-emitting device 300 includes a first type of device 301 and a third type of device 303, the common layer 3121 of the first type of device 301 and the common layer 3121 of the third type of device 303 are at least partially integrally formed; and / or, at least a portion of the common layer 3121 of at least two third type of devices 303 are integrally formed.

[0130] For example, the light-emitting layer 312 of the third type device 303 includes a third light-emitting layer 312c located on the side of the charge-generating layer 313 near the substrate 100 and a fourth light-emitting layer 312d located on the side of the charge-generating layer 313 away from the substrate 100, wherein the common layer 3121 of the first light-emitting layer 312a in the first type device 301 and the common layer 3121 of the third light-emitting layer 312c in the third type device 303 are spaced apart; and / or, the common layer 3121 of the second light-emitting layer 312b in the first type device 301 and the common layer 3121 of the fourth light-emitting layer 312d in the third type device 303 are at least partially integrally formed.

[0131] In a further example, the hole injection layer of the first light-emitting layer 312a in the first type of device 301 may be spaced apart from the hole injection layer of the third light-emitting layer 312c in the third type of device 303; the hole transport layer of the first light-emitting layer 312a in the first type of device 301 may be spaced apart from the hole transport layer of the third light-emitting layer 312c in the third type of device 303; the electron transport layer of the first light-emitting layer 312a in the first type of device 301 may be spaced apart from the electron transport layer of the third light-emitting layer 312c in the third type of device 303; and the electron injection layer of the first light-emitting layer 312a in the first type of device 301 may be spaced apart from the electron transport layer of the third light-emitting layer 312c in the third type of device 303. The electron injection layer of the second light-emitting layer 312b in the first type device 301 is spaced apart from the electron injection layer of the third light-emitting layer 312c in the third type device 303; the hole transport layer of the second light-emitting layer 312b in the first type device 301 can be integrally formed with the hole transport layer of the fourth light-emitting layer 312d in the third type device 303, and the electron injection layer of the second light-emitting layer 312b in the first type device 301 can be integrally formed with the electron injection layer of the fourth light-emitting layer 312d in the third type device 303.

[0132] For example, the hole injection layer of the third light-emitting layer 312c in at least two third-type devices 303 is integrally formed, the hole transport layer of the third light-emitting layer 312c in at least two third-type devices 303 is integrally formed, the electron transport layer of the third light-emitting layer 312c in at least two third-type devices 303 is integrally formed, and the electron injection layer of the third light-emitting layer 312c in at least two third-type devices 303 is integrally formed; the hole transport layer of the fourth light-emitting layer 312d in at least two third-type devices 303 is integrally formed, the electron transport layer of the fourth light-emitting layer 312d in at least two third-type devices 303 is integrally formed, and the electron injection layer of the fourth light-emitting layer 312d in at least two third-type devices 303 is integrally formed.

[0133] In the embodiments of this application, by at least partially integrating the common layer 3121 of the first type of device 301 with the common layer 3121 of the third type of device 303, the fabrication of at least part of the common layer 3121 in the first type of device 301 can be completed simultaneously when fabricating the common layer 3121 of the third type of device 303. This improves the fabrication efficiency of the display panel 10 and reduces the fabrication difficulty of the display panel 10. By integrating at least part of the common layer 3121 in at least two third type of devices 303, the common layer 3121 in different third type of devices 303 can also be fabricated in the same fabrication step, thereby improving the fabrication efficiency of the display panel 10 and reducing the fabrication difficulty of the display panel 10.

[0134] By setting a gap between the common layer 3121 of the first light-emitting layer 312a in the first type of device 301 and the common layer 3121 of the third light-emitting layer 312c in the third type of device 303, the common layer 3121 of the third light-emitting layer 312c in the third type of device 303, which is closer to the circuit layer 200, is less likely to block the connection between the charge generation layer 313 located above the first light-emitting layer 312a in the first type of device 301 and the pixel circuit 210 in the circuit layer 200. This allows the charge generation layer 313 in the first type of device 301 to connect with the pixel circuit 210 in the circuit layer 200 through the gap between the common layer 3121 of the first light-emitting layer 312a in the adjacent first type of device 301 and the common layer 3121 of the third light-emitting layer 312c in the third type of device 303.

[0135] In some embodiments, the charge generation layers 313 of at least two third-type devices 303 are integrally formed; and / or, the charge generation layers 313 of the first-type device 301 and the charge generation layers 313 of the third-type device 303 are spaced apart.

[0136] By integrally molding the charge generation layers 313 of at least two third-type devices 303, the charge generation layers 313 in at least two third-type devices 303 can be fabricated in the same step. Since the integrally molded charge generation layer 313 can have a larger size, it helps reduce the fabrication difficulty of the charge generation layer 313 in the third-type devices 303. By spacing the charge generation layers 313 of the first-type device 301 and the third-type device 303, lateral leakage between adjacent first-type devices 301 and third-type devices 303 through the charge generation layers 313 is less likely, thereby improving the operational stability of the display panel 10. For example, when the first-type device 301 is controlled to emit light in a second state, the first-type device 301 in the second state is less likely to affect the operation of the surrounding third-type devices 303 through the charge generation layers 313, allowing each light-emitting layer 312 located between the first electrode 311 and the second electrode 314 in the third-type device 303 to be effectively illuminated.

[0137] In the embodiments of this application, the types of light-emitting devices 300 in the display panel 10 can be arranged in various ways. For example, each light-emitting device 300 in the display panel 10 can be a first type device 301; or, some of the light-emitting devices 300 in the display panel 10 can be first type devices 301, and other light-emitting devices 300 can be second type devices 302; or, some of the light-emitting devices 300 in the display panel 10 can be first type devices 301, and other light-emitting devices 300 can be third type devices 303; or, some of the light-emitting devices 300 in the display panel 10 can be first type devices 301, other light-emitting devices 300 can be second type devices 302, and other light-emitting devices 300 can be third type devices 303.

[0138] In some embodiments, the display panel 10 further includes a pixel definition layer 400 disposed on the side of the first electrode 311 away from the substrate 100. The pixel definition layer 400 includes a pixel defining portion 410, a pixel opening 420 formed by the pixel defining portion 410, and a connecting opening 430 formed by the pixel defining portion 410. The light-emitting layer 312 is at least partially located in the pixel opening 420. A portion of the surface of the first electrode 311 away from the substrate 100 is exposed from the pixel opening 420 and connected to the light-emitting layer 312. The charge generation layer 313 of at least one light-emitting device 300 extends from the pixel opening 420 into the connecting opening 430 and is connected to the pixel circuit 210 through the connecting opening 430.

[0139] In this embodiment, the pixel definition layer 400 can be used to participate in the division of sub-pixels of the display panel 10, that is, the light-emitting layer 312 located within a single pixel opening 420 that can be lit can correspond to one sub-pixel. The first electrode 311 and the pixel circuit 210 can be connected through a via formed in the insulating layer 1L, and the charge generation layer 313 can be connected to the pixel circuit 210 through the connecting opening 430 in the pixel definition layer 400 and the via in the insulating layer 1L.

[0140] Optionally, the charge generation layer 313 of at least one light-emitting device 300 extends from the pixel opening 420 into the connecting opening 430 and is connected to the pixel circuit 210 through the connecting opening 430. This can refer to the charge generation layer 313 of the first type of light-emitting device 301 extending from the pixel opening 420 into the connecting opening 430 and being connected to the pixel circuit 210 through the connecting opening 430. Optionally, the pixel definition layer 400 located below the charge generation layer 313 of the aforementioned third type of device 303 may not have a connecting opening 430.

[0141] Optionally, the light-emitting layer 312 located on the side of the charge generation layer 313 closest to the substrate 100 is spaced apart from the connecting opening 430, so that the light-emitting layer 312 located on the side of the charge generation layer 313 closest to the substrate 100 is less likely to block the connection between the charge generation layer 313 and the pixel circuit 210 through the connecting opening 430. For example, the first light-emitting layer 312a in the first type of device 301 may be spaced apart from the connecting opening 430. In a further example, the orthographic projection of the first light-emitting layer 312a on the substrate 100 may be spaced apart from the orthographic projection of the connecting opening 430 on the substrate 100.

[0142] In some embodiments, the display panel 10 further includes a partition structure 500 disposed on the side of the pixel defining portion 410 away from the substrate 100, a charge generating layer 313 of at least one light-emitting device 300 extending from the pixel opening 420 to the space between the pixel defining portion 410 and the partition structure 500, and a light-emitting layer 312 located on the side of the charge generating layer 313 away from the substrate 100 extending from the pixel opening 420 to the side of the partition structure 500 away from the substrate 100.

[0143] For example, the charge generation layer 313 of the first type device 301 may extend from the pixel opening 420 to the space between the pixel defining portion 410 and the separation structure 500, and the second light-emitting layer 312b of the first type device 301 may extend from the pixel opening 420 to the side of the separation structure 500 away from the substrate 100.

[0144] In this embodiment, the partition structure 500 located above the pixel limiting portion 410 can be used to separate the charge generation layer 313 outside the pixel opening 420 and the light-emitting layer 312 located on the side of the charge generation layer 313 facing away from the substrate 100. This makes it difficult for the light-emitting layer 312 outside the pixel opening 420 to be lit by the charge generation layer 313, so that the position and shape of the area in the light-emitting state in the sub-pixel can be better the same as the position and shape of the pixel opening 420, thereby enabling the display panel 10 to have a better display effect.

[0145] In some examples, the partition structure 500 may be located only at the arrangement position of the first type of device 301 (not shown in the figure), that is, when the display panel 10 includes the second type of device 302 and the third type of device 303, the partition structure 500 may not be located on the side of the second type of device 302 and the third type of device 303 that is close to or toward the substrate 100.

[0146] In other examples, the separator 500 may also be located at the arrangement position of the second type of device 302 and the third type of device 303, which is beneficial to improving the flatness of the display panel 10. For example, at least a portion of the common layer 3121 in the second type of device 302 may extend from the pixel opening 420 to the side of the separator 500 away from the substrate 100, so that the fabrication process of at least a portion of the common layer 3121 in the second type of device 302 may be performed close to or simultaneously with the fabrication process of at least a portion of the common layer 3121 in the second light-emitting layer 312b in the first type of device 301; or, at least a portion of the common layer 3121 in the second type of device 302 may extend from the pixel opening 420 to between the pixel defining portion 410 and the separator 500 (not shown in the figure), so that the fabrication process of at least a portion of the common layer 3121 in the second type of device 302 may be performed close to or simultaneously with the fabrication process of at least a portion of the common layer 3121 in the first light-emitting layer 312a in the first type of device 301. For example, at least a portion of the charge generation layer 313 in the third type device 303 may extend from the pixel opening 420 to the space between the pixel defining portion 410 and the partition structure 500. At least a portion of the common layer 3121 of the at least portion of the charge generation layer 313 and the third light-emitting layer 312c in the third type device 303 may extend from the pixel opening 420 to the space between the pixel defining portion 410 and the partition structure 500, and at least a portion of the common layer 3121 of the fourth light-emitting layer 312d in the third type device 303 may extend from the pixel opening 420 to the side of the partition structure 500 facing away from the substrate 100, so that the overall fabrication process of the third type device 303 can be carried out close to or simultaneously with the overall fabrication process of the first type device 301.

[0147] Figure 13 This is a partial structural diagram of a light-emitting device 300 and a light extraction layer 315 provided in an embodiment of this application.

[0148] like Figure 13 As shown, optionally, the display panel 10 may also include a light extraction layer 315 (Capping Layer, CPL) disposed on the side of the light-emitting device 300 away from the substrate 100. The light extraction layer 315 can help improve the light extraction efficiency of the display panel 10.

[0149] Figure 14 This is a partial cross-sectional view of a display panel 10 provided in another embodiment of this application.

[0150] like Figure 14 As shown, in some embodiments, the display panel 10 may further include an encapsulation layer 600 disposed on the side of the light-emitting device 300 away from the substrate 100. The encapsulation layer 600 can be used to encapsulate the light-emitting device 300 to improve the working stability of the display panel 10.

[0151] Optionally, the encapsulation layer 600 can be configured in various ways. For example, the encapsulation layer 600 can be an encapsulation layer 600 based on thin film encapsulation (TFE) technology.

[0152] Optionally, in the direction away from the substrate 100, the encapsulation layer 600 may include a first inorganic encapsulation layer 610, an organic encapsulation layer 620, and a second inorganic encapsulation layer 630 stacked sequentially. The materials of the first inorganic encapsulation layer 610 and the second inorganic encapsulation layer 630 may include inorganic materials, which can effectively limit the intrusion of moisture into the light-emitting device 300. The material of the organic encapsulation layer 620 may include organic materials, and the organic encapsulation layer 620 can play a good planarization role.

[0153] According to some embodiments of this application, this application also provides a display device, which includes the display panel 10 in any of the foregoing embodiments.

[0154] Since the display device provided in this application includes the display panel 10 in any of the foregoing embodiments, the display device provided in this application has the beneficial effects of the display panel 10 in any of the foregoing embodiments, which will not be repeated here.

[0155] The display devices provided in this application embodiment may include, but are not limited to, in-vehicle displays, mobile phones, televisions, tablets, smartwatches, and other devices with display functions. For example, the display device may be a laptop computer, mobile phone, wireless device, personal digital assistant (PDA), handheld or portable computer, GPS receiver / navigator, camera, MP4 video player, camcorder, game console, watch, clock, calculator, television monitor, flat panel display, computer monitor, automotive display (e.g., odometer display), navigator, cockpit controller and / or display, camera view display (e.g., display of a rearview camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, etc.

[0156] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A circuit layer is disposed on one side of the substrate, and the circuit layer includes a plurality of pixel circuits; Multiple light-emitting devices are disposed on the side of the circuit layer opposite to the substrate. Each light-emitting device includes a first electrode, a light-emitting layer disposed on the side of the first electrode opposite to the substrate, and a second electrode disposed on the side of the light-emitting layer opposite to the substrate. Wherein, at least one of the light-emitting devices includes at least two stacked light-emitting layers and a charge-generating layer disposed between two adjacent light-emitting layers, and the first electrode and the charge-generating layer of at least one of the light-emitting devices are both connected to the pixel circuit.

2. The display panel according to claim 1, characterized in that, The light-emitting device includes a first type of device, which includes at least two stacked light-emitting layers and further includes a charge-generating layer disposed between two adjacent light-emitting layers. The pixel circuit includes a first type of circuit, which includes at least two control modules. In the interconnected first type of device and the first type of circuit, the charge generation layer of the first type of device is electrically connected to one of the control modules in the first type of circuit, and the first electrode of the first type of device is electrically connected to at least one of the control modules in the first type of circuit.

3. The display panel according to claim 2, characterized in that, The pixel circuit includes a driving module, a data writing module, and a light emission control module. The data writing module is used to write data voltage to the control terminal of the driving module. The first type of circuit includes a first light-emitting control module and a second light-emitting control module. In the interconnected first type of circuit and first type of device, the first light-emitting control module is connected to the first electrode, and the second light-emitting control module is connected to the charge generation layer. The driving module is used to provide a driving signal to the first light-emitting control module and / or the second light-emitting control module according to the voltage of the control terminal.

4. The display panel according to claim 3, characterized in that, The circuit layer further includes a first reset signal line, and the pixel circuit further includes a first reset module, the first terminal of which is connected to the first reset signal line. In the interconnected first type of circuit and first type of device, the first end of the first light-emitting control module is connected to the driving module, the first electrode, the second end of the first reset module, the second end of the first light-emitting control module and the first end of the second light-emitting control module are interconnected, and the second end of the second light-emitting control module is connected to the charge generation layer.

5. The display panel according to claim 4, characterized in that, The circuit layer further includes a first scan signal line, a first light emission control signal line, and a second light emission control signal line. The control terminal of the first reset module is connected to the first scan signal line. In the interconnected first type of circuit and first type of device, the control terminal of the first light-emitting control module is connected to the first light-emitting control signal line, and the control terminal of the second light-emitting control module is connected to the second light-emitting control signal line.

6. The display panel according to claim 2, characterized in that, The first type of device includes blue devices.

7. The display panel according to claim 6, characterized in that, The light-emitting layer comprises at least two stacked common layers and a light-emitting material disposed between two adjacent common layers. In the blue device, at least two of the light-emitting layers have different light-emitting materials.

8. The display panel according to claim 7, characterized in that, The light-emitting layer of the first type of device includes a first light-emitting layer located on the side of the charge generation layer closer to the substrate and a second light-emitting layer located on the side of the charge generation layer away from the substrate. The light-emitting material of the first light-emitting layer of the blue device includes a dark blue light-emitting material, and the light-emitting material of the second light-emitting layer of the blue device includes a light blue light-emitting material; And / or, the maximum wavelength of light emitted when the first light-emitting layer of the blue device emits light is greater than the maximum wavelength of light emitted when the second light-emitting layer of the blue device emits light.

9. The display panel according to claim 2, characterized in that, The first type of device includes at least one of red devices and green devices.

10. The display panel according to claim 2, characterized in that, The light-emitting layer includes at least two stacked common layers and a light-emitting material disposed between two adjacent common layers, and at least a portion of the common layers in at least two of the first type of devices are integrally formed.

11. The display panel according to claim 10, characterized in that, The light-emitting layer of the first type of device includes a first light-emitting layer located on the side of the charge generation layer closer to the substrate and a second light-emitting layer located on the side of the charge generation layer away from the substrate. In this embodiment, the common layer of the first light-emitting layer in at least two of the first type of devices is disposed at intervals; And / or, the common layer of the second light-emitting layer in at least two of the first type of devices is integrally formed.

12. The display panel according to claim 2, characterized in that, The charge generation layers of at least two of the first type of devices are integrally formed; And / or, at least two of the charge generation layers of the first type of device are spaced apart.

13. The display panel according to claim 12, characterized in that, The charge generation layer of the first type of device with the same luminescent color is integrally formed; And / or, the charge generation layers of the first type of device with different luminescent colors are spaced apart.

14. The display panel according to claim 2, characterized in that, The light-emitting device also includes a second type of device, which includes only one light-emitting layer.

15. The display panel according to claim 14, characterized in that, The first type of device includes blue devices, and the second type of device includes at least one of red devices and green devices.

16. The display panel according to claim 14, characterized in that, The light-emitting layer comprises at least two stacked common layers and a light-emitting material disposed between two adjacent common layers. Wherein, the common layer of the first type of device and the common layer of the second type of device are at least partially integrally formed; And / or, at least a portion of the common layer in at least two of the second type of devices is integrally formed.

17. The display panel according to claim 16, characterized in that, The light-emitting layer of the first type of device includes a first light-emitting layer located on the side of the charge generation layer closer to the substrate and a second light-emitting layer located on the side of the charge generation layer away from the substrate. In this embodiment, the common layer of the second light-emitting layer in the first type of device is at least partially integrally formed with the common layer of the second type of device.

18. The display panel according to claim 2, characterized in that, The light-emitting device includes a third type of device, which includes at least two stacked light-emitting layers and further includes a charge-generating layer disposed between two adjacent light-emitting layers. In this type of device, the charge generation layer is electrically connected to the pixel circuit only through the first electrode.

19. The display panel according to claim 18, characterized in that, The first type of device includes blue devices, and the third type of device includes at least one of red devices and green devices.

20. The display panel according to claim 19, characterized in that, The light-emitting layer comprises at least two stacked common layers and a light-emitting material disposed between two adjacent common layers. Wherein, the common layer of the first type of device and the common layer of the third type of device are at least partially integrally formed; And / or, at least a portion of the common layer in at least two of the third type of devices is integrally formed.

21. The display panel according to claim 20, characterized in that, The light-emitting layer of the first type of device includes a first light-emitting layer located on the side of the charge generation layer closer to the substrate and a second light-emitting layer located on the side of the charge generation layer away from the substrate. The light-emitting layer of the third type of device includes a third light-emitting layer located on the side of the charge generation layer closer to the substrate and a fourth light-emitting layer located on the side of the charge generation layer away from the substrate. Wherein, the common layer of the first light-emitting layer in the first type of device and the common layer of the third light-emitting layer in the third type of device are spaced apart; And / or, the common layer of the second light-emitting layer in the first type of device and the common layer of the fourth light-emitting layer in the third type of device are at least partially integrally formed.

22. The display panel according to claim 18, characterized in that, The charge generation layers of at least two of the third type of devices are integrally formed; And / or, the charge generation layer of the first type of device is spaced apart from the charge generation layer of the third type of device.

23. The display panel according to any one of claims 1 to 22, characterized in that, The display panel further includes a pixel definition layer disposed on the side of the first electrode facing away from the substrate. The pixel definition layer includes a pixel defining portion, a pixel opening formed by the pixel defining portion, and a communicating opening formed by the pixel defining portion. The light-emitting layer is at least partially located within the pixel opening, and a portion of the surface of the first electrode facing away from the substrate is exposed from the pixel opening and connected to the light-emitting layer. The charge generation layer of at least one of the light-emitting devices extends from the pixel opening into the communication opening and is connected to the pixel circuit through the communication opening.

24. The display panel according to claim 23, characterized in that, The light-emitting layer located on the side of the charge generation layer near the substrate is spaced apart from the communicating opening.

25. The display panel according to claim 23, characterized in that, The display panel further includes a partition structure disposed on the side of the pixel defining portion opposite to the substrate. At least one of the light-emitting devices has a charge-generating layer extending from the pixel opening to between the pixel defining portion and the separating structure, and the light-emitting layer located on the side of the charge-generating layer facing away from the substrate extends from the pixel opening to the side of the separating structure facing away from the substrate.

26. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 25.

Images