Drive circuit, light-emitting substrate and display apparatus

Abstract

A drive circuit (22), a light-emitting substrate (2) and a display apparatus (1). The drive circuit (22) is used for driving a first light-emitting device (241), a second light-emitting device (242) and a third light-emitting device (243). The first light-emitting device (241) and the second light-emitting device (242) are connected to a first node (N1), and the second light-emitting device (242) and the third light-emitting device (243) are connected to a second node (N2). The drive circuit (22) comprises: a first sub-circuit (221), a second sub-circuit (222) and a third sub-circuit (223). The first sub-circuit (221) is connected to the first light-emitting device (241), a first voltage terminal (V1) and the first node (N1), and the first node (N1) is connected to a second voltage terminal (V2). The first sub-circuit (221) is configured to receive a first data signal under the control of a scan signal terminal (S). The second sub-circuit (222) is connected to the first node (N1) and the second node (N2), and the second node (N2) is connected to a third voltage terminal (V3). The second sub-circuit (222) is configured to receive a second data signal under the control of the scan signal terminal (S). The third sub-circuit (223) is connected to the second node (N2) and the third light-emitting device (243), and the third light-emitting device (243) is connected to a fourth voltage terminal (V4). The third sub-circuit (223) is configured to receive a third data signal under the control of the scan signal terminal (S).

Description

Driving circuit, light-emitting substrate and display device Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a driving circuit, a light-emitting substrate, and a display device. Background Technology

[0002] With the development of technologies such as Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR), people are placing higher demands on near-eye display devices. Summary of the Invention

[0003] On one hand, a driving circuit is provided for driving a light-emitting unit, the light-emitting unit including a first light-emitting device, a second light-emitting device, and a third light-emitting device. The second electrode of the first light-emitting device is connected to the first electrode of the second light-emitting device at a first node, and the second electrode of the second light-emitting device is connected to the first electrode of the third light-emitting device at a second node. The driving circuit includes a first sub-circuit, a second sub-circuit, and a third sub-circuit. The first sub-circuit is connected to a scan signal terminal, the first electrode of the first light-emitting device, a first voltage terminal, and the first node, and the first node is connected to the second voltage terminal. The first sub-circuit is configured to receive a first data signal under the control of the scan signal terminal. The second sub-circuit is connected to the scan signal terminal, the first node, and the second node, and the second node is connected to the third voltage terminal. The second sub-circuit is configured to receive a second data signal under the control of the scan signal terminal. The third sub-circuit is connected to the scan signal terminal, the second node, and the second electrode of the third light-emitting device, and the second electrode of the third light-emitting device is connected to a fourth voltage terminal. The third sub-circuit is configured to receive a third data signal under the control of the scan signal terminal.

[0004] In some embodiments, the first sub-circuit includes a first input unit and a switching unit. The first input unit is connected to a scan signal terminal, a first data signal terminal, and the switching unit, and is configured to transmit a first data signal from the first data signal terminal to the switching unit in response to a scan signal from the scan signal terminal. The switching unit is also connected to a first electrode, a first voltage terminal, and a first node of the first light-emitting device, and is configured to control the magnitude of the current flowing through the first light-emitting device according to the first data signal.

[0005] In some embodiments, the first input unit includes a first transistor, and the switching unit includes a second transistor and a first capacitor. The control electrode of the first transistor is connected to the scan signal terminal, the first electrode of the first transistor is connected to the first data signal terminal, and the second electrode of the first transistor is connected to the control electrode of the second transistor. The first electrode of the second transistor is connected to the first voltage terminal, and the second electrode of the second transistor is connected to the first electrode of the first light-emitting device. The first terminal of the first capacitor is connected to the second electrode and the control electrode of the first transistor, and the second terminal of the first capacitor is connected to the first node.

[0006] In some embodiments, the second sub-circuit includes a second input unit and a first shunt unit. The second input unit is connected to a scan signal terminal, a second data signal terminal, and the first shunt unit, and is configured to transmit a second data signal from the second data signal terminal to the first shunt unit in response to a scan signal from the scan signal terminal. The first shunt unit is also connected between the first node and the second node, and is configured to shunt the current flowing into the second light-emitting device according to the second data signal, thereby controlling the magnitude of the current flowing through the second light-emitting device.

[0007] In some embodiments, the second input unit includes a third transistor, and the first shunt unit includes a fourth transistor and a second capacitor. The control electrode of the third transistor is connected to the scan signal terminal, the first electrode of the third transistor is connected to the second data signal terminal, and the second electrode of the third transistor is connected to the control electrode of the fourth transistor. The first electrode of the fourth transistor is connected to the first node, and the second electrode of the fourth transistor is connected to the second node. The first terminal of the second capacitor is connected to the second electrode of the third transistor and the control electrode of the fourth transistor, and the second terminal of the second capacitor is connected to the second node.

[0008] In some embodiments, the third sub-circuit includes a third input unit and a second shunt unit. The third input unit is connected to a scan signal terminal, a third data signal terminal, and the second shunt unit, and is configured to transmit the third data signal from the third data signal terminal to the second shunt unit in response to a scan signal from the scan signal terminal. The second shunt unit is also connected between the second node and the second electrode of the third light-emitting device, and is configured to shunt the current flowing into the third light-emitting device according to the third data signal to control the magnitude of the current flowing through the third light-emitting device.

[0009] In some embodiments, the third input unit includes a fifth transistor, and the second shunt unit includes a sixth transistor and a third capacitor. The control electrode of the fifth transistor is connected to the scan signal terminal, the first electrode of the fifth transistor is connected to the third data signal terminal, and the second electrode of the fifth transistor is connected to the control electrode of the sixth transistor. The first electrode of the sixth transistor is connected to the second node, and the second electrode of the sixth transistor is connected to the second electrode of the third light-emitting device. The first terminal of the third capacitor is connected to the second electrode of the fifth transistor and the control electrode of the sixth transistor, and the second terminal of the third capacitor is connected to the second electrode of the third light-emitting device.

[0010] In some embodiments, the voltage difference between the first voltage signal provided by the first voltage terminal and the second voltage signal provided by the second voltage terminal is greater than or equal to the threshold voltage of the first light-emitting device. The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal is greater than or equal to the threshold voltage of the second light-emitting device. The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal is greater than or equal to the threshold voltage of the third light-emitting device.

[0011] On the other hand, a driving circuit is provided for driving a light-emitting unit, the light-emitting unit including a first light-emitting device, a second light-emitting device, and a third light-emitting device. The second electrode of the first light-emitting device is connected to the first electrode of the second light-emitting device at a first node, and the second electrode of the second light-emitting device is connected to the first electrode of the third light-emitting device at a second node. The driving circuit includes: a first sub-circuit, a second sub-circuit, a third sub-circuit, and a fourth sub-circuit. The first sub-circuit is connected to the first electrode of the first light-emitting device and a first voltage terminal. The first sub-circuit is configured to receive a first data signal and control the voltage of the first electrode of the first light-emitting device. The second sub-circuit is connected to the first node and a second voltage terminal. The second sub-circuit is configured to receive a second data signal and control the voltage of the first node. The third sub-circuit is connected to the second node, the second voltage terminal, and a third voltage terminal. The third sub-circuit is configured to receive a third data signal and control the voltage of the second node. The fourth sub-circuit is connected to the second electrode of the third light-emitting device, the third voltage terminal, and a fourth voltage terminal. The fourth sub-circuit is configured to receive a fourth data signal and control the voltage of the second electrode of the third light-emitting device.

[0012] In some embodiments, the first sub-circuit includes a first input unit and a first driving unit. The first input unit is connected to a scan signal terminal, a first data signal terminal, and the first driving unit, and is configured to transmit a first data signal from the first data signal terminal to the first driving unit in response to a scan signal from the scan signal terminal. The first driving unit is also connected to a first electrode of the first light-emitting device, a first voltage terminal, and a reference voltage terminal, and is configured to transmit a first voltage signal provided by the first voltage terminal to the first electrode of the first light-emitting device according to the first data signal.

[0013] In some embodiments, the first input unit includes a first transistor, and the first driving unit includes a second transistor and a first capacitor. The control electrode of the first transistor is connected to the scan signal terminal, the first electrode of the first transistor is connected to the first data signal terminal, and the second electrode of the first transistor is connected to the control electrode of the second transistor. The first electrode of the second transistor is connected to the first voltage terminal, and the second electrode of the second transistor is connected to the first electrode of the first light-emitting device. The first terminal of the first capacitor is connected to the second electrode and the control electrode of the first transistor, and the second terminal of the first capacitor is connected to the reference voltage terminal.

[0014] In some embodiments, the second sub-circuit includes a second input unit and a second driving unit. The second input unit is connected to a scan signal terminal, a second data signal terminal, and the second driving unit, and is configured to transmit a second data signal from the second data signal terminal to the second driving unit in response to a scan signal from the scan signal terminal. The second driving unit is also connected to the first node, the second voltage terminal, and a reference voltage terminal, and is configured to transmit a second voltage signal provided by the second voltage terminal to the first node based on the second data signal.

[0015] In some embodiments, the second input unit includes a third transistor, and the second driving unit includes a fourth transistor and a second capacitor. The control electrode of the third transistor is connected to the scan signal terminal, the first electrode of the third transistor is connected to the second data signal terminal, and the second electrode of the third transistor is connected to the control electrode of the fourth transistor. The first electrode of the fourth transistor is connected to the second voltage terminal, and the second electrode of the fourth transistor is connected to the first node. The first terminal of the second capacitor is connected to the second electrode of the third transistor and the control electrode of the fourth transistor, and the second terminal of the second capacitor is connected to the reference voltage terminal.

[0016] In some embodiments, the third sub-circuit includes a third input unit and a third driving unit. The third input unit is connected to a scan signal terminal, a third data signal terminal, and the third driving unit, and is configured to transmit a third data signal from the third data signal terminal to the third driving unit in response to a scan signal from the scan signal terminal. The third driving unit is also connected to the second node, the second voltage terminal, the third voltage terminal, and a reference voltage terminal, and is configured to transmit a second voltage signal provided by the second voltage terminal or a third voltage signal provided by the third voltage terminal to the second node based on the third data signal.

[0017] In some embodiments, the third input unit includes a fifth transistor, and the third driving unit includes a sixth transistor, a seventh transistor, and a third capacitor. The sixth transistor and the seventh transistor have opposite switching types. The control electrode of the fifth transistor is connected to the scan signal terminal, the first electrode of the fifth transistor is connected to the third data signal terminal, and the second electrode of the fifth transistor is connected to the control electrodes of the sixth transistor and the seventh transistor. The first electrode of the sixth transistor is connected to the second voltage terminal and the second node. The first electrode of the seventh transistor is connected to the third voltage terminal, and the second electrode of the seventh transistor is connected to the second node. The first terminal of the third capacitor is connected to the second electrode of the fifth transistor, the control electrode of the sixth transistor, and the control electrode of the seventh transistor, and the second terminal of the third capacitor is connected to the reference voltage terminal.

[0018] In some embodiments, the fourth sub-circuit includes a fourth input unit and a fourth driving unit. The fourth input unit is connected to a scan signal terminal, a fourth data signal terminal, and the fourth driving unit, and is configured to transmit a fourth data signal from the fourth data signal terminal to the fourth driving unit in response to a scan signal from the scan signal terminal. The fourth driving unit is also connected to the second electrode of the third light-emitting device, the third voltage terminal, the fourth voltage terminal, and a reference voltage terminal, and is configured to transmit a third voltage signal provided by the third voltage terminal or a fourth voltage signal provided by the fourth voltage terminal to the second electrode of the third light-emitting device according to the fourth data signal.

[0019] In some embodiments, the fourth input unit includes an eighth transistor, and the fourth driving unit includes a ninth transistor, a tenth transistor, and a fourth capacitor. The ninth transistor and the tenth transistor have opposite switching types. The control electrode of the eighth transistor is connected to the scan signal terminal, the first electrode of the eighth transistor is connected to the fourth data signal terminal, and the second electrode of the eighth transistor is connected to the control electrodes of the ninth transistor and the tenth transistor. The first electrode of the ninth transistor is connected to the third voltage terminal, and the second electrode of the ninth transistor is connected to the second electrode of the third light-emitting device. The first electrode of the tenth transistor is connected to the fourth voltage terminal, and the second electrode of the tenth transistor is connected to the second electrode of the third light-emitting device. The first terminal of the fourth capacitor is connected to the second electrode of the eighth transistor, the control electrode of the ninth transistor, and the control electrode of the tenth transistor, and the second terminal of the fourth capacitor is connected to the reference voltage terminal.

[0020] In some embodiments, the first sub-circuit further includes a first control unit. The first driving unit is connected to the first voltage terminal via the first control unit, and the first control unit is also connected to an enable signal terminal. The first control unit is configured to transmit the first voltage signal to the first driving unit under the control of an enable signal from the enable signal terminal, so as to at least control the light emission duration of the first light-emitting device.

[0021] In some embodiments, the third sub-circuit further includes a second control unit. The third driving unit is connected to the second node via the second control unit, which is also connected to an enable signal terminal. The second control unit is configured to, under the control of an enable signal from the enable signal terminal, transmit the second voltage signal or the third voltage signal to the first electrode of the third light-emitting device to control the light-emitting duration of the second light-emitting device and / or the third light-emitting device.

[0022] In some embodiments, the voltage difference between the first voltage signal provided by the first voltage terminal and the second voltage signal provided by the second voltage terminal is greater than or equal to the threshold voltage of the first light-emitting device. The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal is greater than or equal to the threshold voltage of the second light-emitting device. The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal is greater than or equal to the threshold voltage of the third light-emitting device.

[0023] In another aspect, a light-emitting substrate is provided, comprising: a driving substrate, a plurality of light-emitting units, and a plurality of connecting posts. The driving substrate includes a plurality of driving circuits as described in any of the above embodiments. A plurality of light-emitting units are disposed on the driving substrate, and the driving circuits are used to drive one light-emitting unit. Each light-emitting unit includes a plurality of light-emitting devices, the plurality of light-emitting devices including a first light-emitting device, a second light-emitting device, and a third light-emitting device sequentially stacked along a first direction, the first direction being the thickness direction of the driving substrate. A plurality of connecting posts extend along the first direction. The plurality of connecting posts include a first connecting post and a second connecting post, wherein the second electrode of the first light-emitting device and the first electrode of the second light-emitting device are electrically connected through the first connecting post, and the second electrode of the second light-emitting device and the first electrode of the third light-emitting device are electrically connected through the second connecting post.

[0024] In some embodiments, the light-emitting substrate further includes a second dielectric layer and a third dielectric layer, wherein the second dielectric layer surrounds the second light-emitting device, and the third dielectric layer surrounds the third light-emitting device. The first connecting post is located beside the second light-emitting device and penetrates the second dielectric layer. The second connecting post is located beside the third light-emitting device and penetrates the third dielectric layer.

[0025] In some embodiments, the plurality of connecting posts further includes a third connecting post, the third connecting post being used to electrically connect the second electrode of the first light-emitting device and the driving substrate.

[0026] In some embodiments, the orthographic projection of the third connecting post on the driving substrate is located within the orthographic projection range of the first light-emitting device on the driving substrate. Alternatively, the light-emitting substrate further includes a first dielectric layer surrounding the first light-emitting device, with the third connecting post located beside the first light-emitting device and penetrating the first dielectric layer. Along the first direction, the third connecting post is connected to the first connecting post, and the orthographic projection of the third connecting post on the driving substrate at least partially overlaps with the orthographic projection of the first connecting post on the driving substrate.

[0027] In some embodiments, the plurality of connecting posts further include: a first connecting structure, the first connecting structure being used to electrically connect the second electrode of the second light-emitting device and the driving substrate.

[0028] In some embodiments, the first connection structure includes a fourth connecting post and a fifth connecting post, the fourth connecting post penetrating through a first dielectric layer surrounding the first light-emitting device, and the fifth connecting post penetrating through a second dielectric layer surrounding the second light-emitting device. Along the first direction, the fourth connecting post and the fifth connecting post are connected, and the orthographic projection of the fourth connecting post on the driving substrate at least partially overlaps with the orthographic projection of the fifth connecting post on the driving substrate.

[0029] In some embodiments, along the first direction, the second connecting post is connected to the fifth connecting post, and the orthographic projection of the second connecting post on the driving substrate and the orthographic projection of the fifth connecting post on the driving substrate at least partially overlap.

[0030] In some embodiments, the plurality of connecting posts further includes a sixth connecting post, which is used to electrically connect the first electrode of the first light-emitting device and the driving substrate.

[0031] In some embodiments, the orthographic projection of the sixth connecting post on the driving substrate is located within the orthographic projection range of the first light-emitting device on the driving substrate. Alternatively, the sixth connecting post is located beside the first light-emitting device and penetrates the first dielectric layer surrounding the first light-emitting device.

[0032] In some embodiments, the plurality of connecting posts further include a second connecting structure for electrically connecting the second electrode of the third light-emitting device and the driving substrate.

[0033] In some embodiments, the second connection structure includes a seventh connecting post, an eighth connecting post, and a ninth connecting post. The seventh connecting post penetrates a first dielectric layer surrounding the first light-emitting device, the eighth connecting post penetrates a second dielectric layer surrounding the second light-emitting device, and the ninth connecting post penetrates a third dielectric layer surrounding the third light-emitting device. Along the first direction, the seventh connecting post is connected to the eighth connecting post, and the orthographic projection of the seventh connecting post on the driving substrate at least partially overlaps with the orthographic projection of the eighth connecting post on the driving substrate. Along the first direction, the eighth connecting post is connected to the ninth connecting post, and the orthographic projection of the eighth connecting post on the driving substrate at least partially overlaps with the orthographic projection of the ninth connecting post on the driving substrate.

[0034] In some embodiments, one of the first electrode and the second electrode of the light-emitting device is a negative electrode, and the other is a positive electrode.

[0035] In some embodiments, in the same light-emitting device, the positive electrode of the first electrode and the second electrode is disposed closer to the driving substrate.

[0036] In some embodiments, the light-emitting device further includes: a first type semiconductor pattern, a light-emitting layer, and a second type semiconductor pattern, sequentially stacked between the first electrode and the second electrode along the first direction. The orthographic projection of the first type semiconductor pattern on the driving substrate is within the orthographic projection range of the second type semiconductor pattern on the driving substrate. The electrode in contact with the first type semiconductor pattern among the first electrode and the second electrode of the light-emitting device is a first preset electrode. The first preset electrode of at least one of the first light-emitting device, the second light-emitting device, and the third light-emitting device includes: a first sub-part, a second sub-part, and a third sub-part. The first sub-part is in direct contact with the first type semiconductor pattern, the third sub-part is in direct contact with the corresponding connecting post, and the second sub-part is located between the first sub-part and the third sub-part and is electrically connected to the first sub-part and the third sub-part.

[0037] In some embodiments, an insulating layer is provided between the first sub-part and the third sub-part, and a through hole is provided in the insulating layer. The second sub-part is disposed in the through hole and is electrically connected to the first sub-part and the third sub-part, respectively.

[0038] In some embodiments, the third sub-part extends from the side of the first sub-part away from the light-emitting layer, through the sidewall of the light-emitting device, to the surrounding area of ​​the light-emitting device.

[0039] In some embodiments, the first preset electrode of the second light-emitting device and the third light-emitting device includes a first sub-part, a second sub-part, and a third sub-part.

[0040] In some embodiments, the electrode in contact with the second type of semiconductor pattern among the first and second electrodes of the light-emitting device is a second preset electrode. The second preset electrode includes an electrically connected fourth sub-part and a fifth sub-part. The fourth sub-part is in direct contact with the second type of semiconductor pattern, and the fifth sub-part is in direct contact with a corresponding connecting post.

[0041] In some embodiments, the fourth and fifth sub-parts extend in a plane on the side of the second type of semiconductor pattern away from the light-emitting layer. The fifth sub-part extends into the surrounding area of ​​the light-emitting device.

[0042] In some embodiments, the light-emitting device further includes a dimming layer disposed on one of the first electrode and the second electrode, relatively close to the driving substrate, on the side closer to the driving substrate. The orthographic projection of the light-emitting layer of the light-emitting device onto the driving substrate lies within the orthographic projection range of the dimming layer onto the driving substrate. The dimming layer is configured to transmit light incident on the dimming layer from the side of the dimming layer close to the driving substrate and reflect light incident on the dimming layer from the side of the dimming layer away from the driving substrate.

[0043] In some embodiments, the dimming layer in the first light-emitting device is a first dimming layer, configured to reflect light emitted by the first, second, and third light-emitting devices. The dimming layer in the second light-emitting device is a second dimming layer, configured to reflect light emitted by the second and third light-emitting devices and transmit light emitted by the first light-emitting device. The dimming layer in the third light-emitting device is a third dimming layer, configured to reflect light emitted by the third light-emitting device and transmit light emitted by the first and second light-emitting devices.

[0044] In some embodiments, the light emitted by the light-emitting layers of multiple light-emitting devices in the same light-emitting unit is of the same color. At least one of the light-emitting devices further includes a color conversion layer disposed on the side of the first electrode and the second electrode that is away from the driving substrate relative to the one away from the driving substrate. The orthographic projection of the light-emitting layer of the light-emitting device onto the driving substrate lies within the orthographic projection range of the color conversion layer onto the driving substrate. The color conversion layer is configured to convert the light emitted by the light-emitting layer into light of a predetermined color.

[0045] In some embodiments, the light emitted by the light-emitting layers of at least two light-emitting devices in the same light-emitting unit is of different colors.

[0046] In some embodiments, the wavelength of the light emitted by the first light-emitting device is greater than the wavelength of the light emitted by the second light-emitting device, and the wavelength of the light emitted by the second light-emitting device is greater than the wavelength of the light emitted by the third light-emitting device.

[0047] In some embodiments, the light-emitting device further includes: a first type semiconductor pattern, a light-emitting layer, and a second type semiconductor pattern, which are sequentially stacked between the first electrode and the second electrode along the first direction. Compared to the second type semiconductor pattern, the first type semiconductor pattern is closer to the light-emitting side of the light-emitting device. The surface roughness of the side of the first type semiconductor pattern away from the light-emitting layer ranges from 0.1 μm to 0.3 μm.

[0048] In another aspect, a display device is provided, comprising: a driving circuit as described in any of the above embodiments, and / or a light-emitting substrate as described in any of the above embodiments. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be considered as schematic diagrams and are not intended to limit the actual dimensions, etc., of the products involved in the embodiments of this disclosure.

[0050] Figure 1 is a structural diagram of a display device according to some embodiments of the present disclosure;

[0051] Figure 2 is a structural diagram of another display device according to some embodiments of the present disclosure;

[0052] Figure 3 is a partial structural diagram of a display device according to some embodiments of the present disclosure;

[0053] Figure 4 is a structural diagram of a light-emitting substrate according to some embodiments of the present disclosure;

[0054] Figure 5 is an equivalent diagram of a driving circuit and a light-emitting unit according to some embodiments of the present disclosure;

[0055] Figure 6 is an equivalent diagram of a first sub-circuit and a first light-emitting device according to some embodiments of the present disclosure;

[0056] Figure 7 is an equivalent diagram of a second sub-circuit and a second light-emitting device according to some embodiments of the present disclosure;

[0057] Figure 8 is an equivalent diagram of a third sub-circuit and a third light-emitting device according to some embodiments of the present disclosure;

[0058] Figure 9 is an equivalent diagram of another driving circuit and light-emitting unit according to some embodiments of the present disclosure;

[0059] Figure 10 is a timing diagram of a driving circuit according to some embodiments of the present disclosure;

[0060] Figure 11 is an equivalent diagram of another driving circuit and light-emitting unit according to some embodiments of the present disclosure;

[0061] Figure 12 is an equivalent diagram of another first sub-circuit and a first light-emitting device according to some embodiments of the present disclosure;

[0062] Figure 13 is an equivalent diagram of yet another first sub-circuit and first light-emitting device according to some embodiments of the present disclosure;

[0063] Figure 14 is an equivalent diagram of a second sub-circuit, a first light-emitting device, and a second light-emitting device according to some embodiments of the present disclosure;

[0064] Figure 15 is an equivalent diagram of a third sub-circuit, a second light-emitting device, and a third light-emitting device according to some embodiments of the present disclosure;

[0065] Figure 16 is an equivalent diagram of another third sub-circuit, second light-emitting device and third light-emitting device according to some embodiments of the present disclosure;

[0066] Figure 17 is an equivalent diagram of a fourth sub-circuit and a third light-emitting device according to some embodiments of the present disclosure;

[0067] Figure 18 is an equivalent diagram of another driving circuit and light-emitting unit according to some embodiments of the present disclosure;

[0068] Figure 19 is a timing diagram of another driving circuit according to some embodiments of the present disclosure;

[0069] Figures 20 to 27 are schematic diagrams of a driving circuit under different driving methods according to some embodiments of the present disclosure;

[0070] Figure 28 is a structural diagram of another light-emitting substrate according to some embodiments of the present disclosure;

[0071] Figure 29 is a structural diagram of yet another light-emitting substrate according to some embodiments of the present disclosure;

[0072] Figure 30 is a structural diagram of another light-emitting substrate according to some embodiments of the present disclosure;

[0073] Figure 31 is a schematic diagram of the planar positional relationship between the light-emitting device and the connecting post in the light-emitting substrate provided in Figure 28;

[0074] Figures 32 to 63 are structural diagrams of the light-emitting substrate in different fabrication processes according to some embodiments of the present disclosure. Detailed Implementation

[0075] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0076] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0077] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0078] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0079] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0080] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0081] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0082] As used herein, "perpendicular" and "equal" include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity could be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality could be, for example, a difference between the two equalities less than or equal to 5% of either one.

[0083] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0084] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0085] In the various circuit structures (e.g., driving circuits) provided in the embodiments of this disclosure, the transistors used can be thin film transistors (TFTs), metal oxidized semiconductor transistors (MOSs), or other switching devices with the same characteristics. In the embodiments of this disclosure, thin film transistors are used as an example for illustration.

[0086] In the circuit structure provided in the embodiments of this disclosure, the first terminal of each transistor is one of the source and the drain, and the second terminal of each transistor is the other of the source and the drain. Since the source and drain of a transistor can be symmetrical in structure, they can be indistinguishable in structure. That is to say, the first and second terminals of the transistors in the embodiments of this disclosure can be indistinguishable in structure.

[0087] For example, when the transistor is a P-type transistor, the first electrode of the transistor is the source and the second electrode is the drain; for example, when the transistor is an N-type transistor, the first electrode of the transistor is the drain and the second electrode is the source.

[0088] In the circuit structure provided by the embodiments of this disclosure, nodes such as the first node and the second node do not represent actual existing components, but rather represent the junction points of related couplings in the circuit diagram. In other words, these nodes are equivalent to the junction points of related couplings in the circuit diagram.

[0089] In this disclosure, the P-type transistor can be turned on under the control of a low-level signal, and the N-type transistor can be turned on under the control of a high-level signal.

[0090] Some embodiments of this disclosure provide a display device. As shown in Figures 1-3, the display device 1 can be any display device 1 that displays either moving (e.g., video) or stationary (e.g., still images) text or images. More specifically, the display device 1 of the described embodiments is contemplated for implementation in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of an item), etc.

[0091] For example, the display device can be a head-mounted display device used in near-eye display fields such as 2D, 3D, VR (Virtual Reality), AR (Augmented Reality), and MR (Mixed Reality), as well as in the lighting field. For instance, the display device 1 can be a head-up display (HUD), a projector (see Figure 1), a near-eye display device such as a head-mounted display device (see Figure 2), or a colored vehicle headlight.

[0092] For example, the above-mentioned display device 1 includes: a frame, a display driver IC (Integrated Circuit), and other electronic components.

[0093] In some examples, the display device 1 further includes a light-emitting substrate 2. The light-emitting substrate 2 can be used directly for image display, and the display device 1 is an active light-emitting display device. Since the light-emitting substrate 2 can emit light itself, there is no need to configure a separate backlight module.

[0094] For example, the light-emitting substrate 2 is connected to the display driver IC and receives display signals from the display driver IC to emit light.

[0095] As exemplarily shown in FIG4, the light-emitting substrate 2 includes a driving substrate 21 and light-emitting units 23 disposed on the driving substrate 21. The driving substrate 21 includes a plurality of driving circuits 22.

[0096] The light-emitting unit 23 includes multiple light-emitting devices 24, which are connected to corresponding driving circuits 22. Each light-emitting device 24 receives electrical signals from the driving circuits 22 and emits light of different colors under the influence of these signals. The different colors of light emitted by the multiple light-emitting devices 24 combine with each other, allowing each light-emitting unit 23 to emit light of different colors and brightness.

[0097] For example, the light-emitting device 24 described above may include an LED (Light Emitting Diode).

[0098] For example, multiple light-emitting devices 24 in the same light-emitting unit 23 include a first light-emitting device 241, a second light-emitting device 242, and a third light-emitting device 243. The first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 emit light of different colors.

[0099] In one possible implementation, each light-emitting device in the same light-emitting unit is connected to a different driving circuit in the driving substrate. One driving circuit controls the light emission of one light-emitting device. The large number of driving circuits results in a large power consumption of the light-emitting unit and the light-emitting substrate.

[0100] Based on this, as shown in FIG5, an embodiment of the present disclosure provides a driving circuit 22, which is applied to the driving substrate 21 in the above embodiment. The driving circuit 22 is used to drive the light-emitting unit 23, which includes a first light-emitting device 241, a second light-emitting device 242, and a third light-emitting device 243.

[0101] As shown in Figures 5 and 9, the second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are connected to the first node N1, and the second electrode 2402 of the second light-emitting device 242 and the first electrode 2401 of the third light-emitting device 243 are connected to the second node N2. Thus, a series connection can be achieved between the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243. Therefore, a single driving circuit 22 can be used to electrically connect the three light-emitting devices 24, and the driving circuit 22 can be used to drive the three light-emitting devices 24 to achieve different light-emitting states.

[0102] The driving circuit 22 includes a first sub-circuit 221, a second sub-circuit 222, and a third sub-circuit 223.

[0103] As shown in Figure 5, the first sub-circuit 221 is connected to the scanning signal terminal S, the first electrode 2401 of the first light-emitting device 241, the first voltage terminal V1, and the first node N1. The first node N1 is connected to the second voltage terminal V2. For example, the first sub-circuit 221 is also connected to the first data signal terminal D11.

[0104] The first sub-circuit 221 is configured to receive a first data signal from the first data signal terminal D11 under the control of the scanning signal terminal S.

[0105] For example, under the action of the first data signal, the first voltage provided by the first voltage terminal V1, and the electrical signal of the first node N1, the first sub-circuit 221 controls the first light-emitting device 241 to emit light of different brightness.

[0106] As shown in Figure 5, the second sub-circuit 222 is connected to the scanning signal terminal S, the first node N1, and the second node N2. The second node N2 is connected to the third voltage terminal V3. For example, the second sub-circuit 222 is also connected to the second data signal terminal D12.

[0107] The second sub-circuit 222 is configured to receive a second data signal from the second data signal terminal D12 under the control of the scanning signal terminal S. For example, under the action of the second data signal, the electrical signal of the first node N1, and the electrical signal of the second node N2, the second sub-circuit 222 controls the second light-emitting device 242 to emit light of different brightness.

[0108] As shown in Figure 5, the third sub-circuit 223 is connected to the scanning signal terminal S, the second node N2, and the second electrode 2402 of the third light-emitting device 243. The second electrode 2402 of the third light-emitting device 24 is connected to the fourth voltage terminal V4. For example, the third sub-circuit 223 is also connected to the third data signal terminal D13.

[0109] The third sub-circuit 223 is configured to receive a third data signal from the third data signal terminal D13 under the control of the scanning signal terminal S. For example, under the action of the third data signal, the electrical signal of the second node N2, and the electrical signal of the second electrode 2402 of the third light-emitting device 243, the third sub-circuit 223 controls the third light-emitting device 243 to emit light of different brightness.

[0110] Thus, the light-emitting unit 23 is connected to the driving circuit 22, and under the action of the electrical signal provided by the driving circuit 22, the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243 emit light of different brightness, so that the same light-emitting unit 23 can emit light of different colors, thereby enabling one driving circuit 22 to control three light-emitting devices 24. The number of driving circuits 22 in the light-emitting substrate 2 is relatively small, which helps to reduce the power consumption of the light-emitting substrate 2 and the display device.

[0111] The driving circuit 22 provided in the embodiments of this disclosure is configured such that a first sub-circuit 221 is connected to the first electrode of the first light-emitting device 241, a second sub-circuit 222 is connected to the first node and the second node, and a third sub-circuit 223 is connected to the second node and the second electrode of the third light-emitting device 243. The second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are connected to the first node N1, and the second electrode 2402 of the second light-emitting device 242 and the first electrode 2401 of the third light-emitting device 243 are connected to the second node N2. Thus, the same driving circuit 22 can be used to drive three light-emitting devices 24 to emit light of different brightness, thereby reducing the number of driving circuits 22 in the driving substrate 21, which is beneficial to reducing the power consumption of the light-emitting substrate 2 and the display device.

[0112] For example, the first light-emitting device 241 can emit red light, the second light-emitting device 242 can emit green light, and the third light-emitting device 243 can emit blue light.

[0113] For example, the first light-emitting device 241 can emit blue light, the second light-emitting device 242 can emit green light, and the third light-emitting device 243 can emit red light.

[0114] It is understood that there are various structures for the first sub-circuit 221, the second sub-circuit 222, and the third sub-circuit 223, which can be configured as needed. The embodiments disclosed herein do not limit this.

[0115] In some embodiments, as shown in FIG6, the first sub-circuit 221 includes a first input unit 2211 and a switching unit 2212.

[0116] The first input unit 2211 is connected to the scan signal terminal S, the first data signal terminal D11 and the switch unit 2212, and is configured to transmit the first data signal from the first data signal terminal D11 to the switch unit 2212 in response to the scan signal from the scan signal terminal S.

[0117] The switching unit 2212 is also connected to the first electrode, the first voltage terminal V1 and the first node N1 of the first light-emitting device 241, and is configured to control the magnitude of the current flowing through the first light-emitting device 241 according to the first data signal.

[0118] The magnitude of the current flowing through the first light-emitting device 241 is related to the brightness of the first light-emitting device 241. Therefore, the brightness of the first light-emitting device 241 can be controlled by the first sub-circuit 221. For example, the brightness of the first light-emitting device 241 can be 0, that is, the first light-emitting device 241 does not emit light.

[0119] In some examples, as shown in Figures 6 and 9, the first input unit 2211 includes a first transistor T1, and the switching unit 2212 includes a second transistor T2 and a first capacitor C11.

[0120] The control electrode of the first transistor T1 is connected to the scan signal terminal S, the first electrode of the first transistor T1 is connected to the first data signal terminal D11, and the second electrode of the first transistor T1 is connected to the control electrode of the second transistor T2. The first transistor T1 is configured to transmit the first data signal to the switching unit 2212, for example, to the control electrode of the second transistor T2 in the switching unit 2212, in response to the scan signal from the scan signal terminal S.

[0121] The first terminal of the second transistor T2 is connected to the first voltage terminal V1, and the second terminal of the second transistor T2 is connected to the first electrode 2401 of the first light-emitting device 241. The second transistor T2 is configured to transmit a first voltage signal from the first voltage terminal V1 to the first electrode 2401 of the first light-emitting device 241 in response to a first data signal.

[0122] The first terminal of the first capacitor C11 is connected to the second terminal and the control terminal of the first transistor T1, and the second terminal of the first capacitor C11 is connected to the first node N1. Thus, during the transmission of the first data signal from the first transistor T1 to the second transistor T2, the first data signal can charge the first capacitor C11. After the first transistor T1 is turned off, the first capacitor C11 can discharge to the control terminal of the second transistor T2, keeping the second transistor T2 in an on state and transmitting the first voltage signal to the first electrode 2401 of the first light-emitting device 241.

[0123] In some embodiments, as shown in FIG7, the second sub-circuit 222 includes a second input unit 2221 and a first shunt unit 2222.

[0124] The second input unit 2221 is connected to the scan signal terminal S, the second data signal terminal D12 and the first splitting unit 2222, and is configured to transmit the second data signal from the second data signal terminal D12 to the first splitting unit 2222 in response to the scan signal from the scan signal terminal S.

[0125] The first shunt unit 2222 is also connected between the first node N1 and the second node N2, and is configured to shunt the current flowing into the second light-emitting device 242 according to the second data signal, so as to control the magnitude of the current flowing through the second light-emitting device 242.

[0126] The magnitude of the current flowing through the second light-emitting device 242 is related to the brightness of the second light-emitting device 242. Therefore, the brightness of the second light-emitting device 242 can be controlled by the second sub-circuit 222. For example, the brightness of the second light-emitting device 242 can be 0, that is, the second light-emitting device 242 does not emit light.

[0127] In some examples, as shown in Figures 7 and 9, the second input unit 2221 includes a third transistor T3, and the first shunt unit 2222 includes a fourth transistor T4 and a second capacitor C12.

[0128] The control electrode of the third transistor T3 is connected to the scan signal terminal S, the first electrode of the third transistor T3 is connected to the second data signal terminal D12, and the second electrode of the third transistor T3 is connected to the control electrode of the fourth transistor T4. The third transistor T3 is configured to transmit the second data signal to the control electrode of the fourth transistor T4 in the switching unit, in response to the scan signal from the scan signal terminal S.

[0129] The first terminal of the fourth transistor T4 is connected to the first node N1, and the second terminal of the fourth transistor T4 is connected to the second node N2. The fourth transistor T4 is configured to transmit an electrical signal from the first node N1 to the second node N2 in response to a second data signal.

[0130] The first terminal of the second capacitor C12 is connected to the second terminal of the third transistor T3 and the control terminal of the fourth transistor T4, and the second terminal of the second capacitor C12 is connected to the second node N2. Thus, during the transmission of the second data signal from the third transistor T3 to the fourth transistor T4, the second data signal can charge the second capacitor C12. After the third transistor T3 is turned off, the second capacitor C12 can discharge to the control terminal of the fourth transistor T4, keeping the fourth transistor T4 in an on state and transmitting the electrical signal from the first node N1 to the second node N2.

[0131] In some embodiments, as shown in FIG8, the third sub-circuit 223 includes a third input unit 2231 and a second shunt unit 2232.

[0132] The third input unit 2231 is connected to the scan signal terminal S, the third data signal terminal D13 and the second splitting unit 2232, and is configured to transmit the third data signal from the third data signal terminal D13 to the second splitting unit 2232 in response to the scan signal from the scan signal terminal S.

[0133] The second shunt unit 2232 is also connected between the second node N2 and the second electrode of the third light-emitting device 243, and is configured to shunt the current flowing into the third light-emitting device 243 according to the third data signal, so as to control the magnitude of the current flowing through the third light-emitting device 243.

[0134] The magnitude of the current flowing through the third light-emitting device 243 is related to the brightness of the third light-emitting device 243. Therefore, the brightness of the third light-emitting device 243 can be controlled by the third sub-circuit 223. For example, the brightness of the third light-emitting device 243 can be 0, that is, the third light-emitting device 243 does not emit light.

[0135] In some embodiments, as shown in FIG8 and FIG9, the third input unit 2231 includes a fifth transistor T5, and the second shunt unit 2232 includes a sixth transistor T6 and a third capacitor C13.

[0136] The control electrode of the fifth transistor T5 is connected to the scan signal terminal S, the first electrode of the fifth transistor T5 is connected to the third data signal terminal D13, and the second electrode of the fifth transistor T5 is connected to the control electrode of the sixth transistor T6. The fifth transistor T5 is configured to transmit the third data signal to the control electrode of the sixth transistor T6 in the switching unit, in response to the scan signal from the scan signal terminal S.

[0137] The first electrode of the sixth transistor T6 is connected to the second node N2, and the second electrode of the sixth transistor T6 is connected to the second electrode 2402 of the third light-emitting device 243. The sixth transistor T6 is configured to transmit an electrical signal from the second node N2 to the second electrode 2402 of the third light-emitting device 243 in response to a third data signal.

[0138] The first terminal of the third capacitor C13 is connected to the second electrode of the fifth transistor T5 and the control electrode of the sixth transistor T6, and the second terminal of the third capacitor C13 is connected to the second electrode 2402 of the third light-emitting device 243. Thus, during the transmission of the third data signal from the fifth transistor T5 to the sixth transistor T6, the third data signal can charge the third capacitor C13. After the fifth transistor T5 is turned off, the third capacitor C13 can discharge to the control electrode of the sixth transistor T6, keeping the sixth transistor T6 in an on state and transmitting the electrical signal of the second node N2 to the second electrode 2402 of the third light-emitting device 243.

[0139] In some embodiments, as shown in FIG9, the voltage difference between the first voltage signal provided by the first voltage terminal V1 and the second voltage signal provided by the second voltage terminal V2 is greater than or equal to the threshold voltage of the first light-emitting device 241. Therefore, when the first electrode 2401 of the first light-emitting device 241 receives the first voltage and the second electrode 2402 receives the second voltage provided by the first node N1, the first light-emitting device 241 can emit light.

[0140] The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal V3 is greater than or equal to the threshold voltage of the second light-emitting device 242. Therefore, when the first electrode 2401 of the second light-emitting device 242 receives the second voltage and the second electrode 2402 receives the third voltage provided by the second node N2, the second light-emitting device 242 can emit light.

[0141] The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal V4 is greater than or equal to the threshold voltage of the third light-emitting device 243. Therefore, when the first electrode 2401 of the third light-emitting device 243 receives the third voltage and the second electrode 2402 receives the fourth voltage, the third light-emitting device 243 can emit light.

[0142] Embodiments of this disclosure also provide a driving method for a light-emitting substrate 2, which can be applied to the driving circuit 22 described in any of the above embodiments. Referring to Figures 9 and 10, the driving method includes:

[0143] Write the first data signal Data11 to the first sub-circuit 221 so that the driving channel formed by the three light-emitting devices 24 connected in series is turned on, and the first light-emitting device 241 emits light based on the voltage difference between the first voltage terminal V1 and the first node N1.

[0144] Write the second data signal Data12 to the second sub-circuit 222 to shunt the current flowing into the second light-emitting device 242 and control the magnitude of the current flowing through the second light-emitting device 242.

[0145] Write the third data signal Data13 to the third sub-circuit 223 to shunt the current flowing into the third light-emitting device 243 and control the magnitude of the current flowing through the third light-emitting device 243.

[0146] For example, a scan signal Gate(n) is written to the first transistor T1 in the first sub-circuit 221. The first transistor T1 turns on under the control of the scan signal Gate(n), transmitting the first data signal Data11 to the control electrode of the second transistor T2. The second transistor T2 turns on under the control of the first data signal Data11, transmitting the first voltage signal to the first electrode 2401 of the first light-emitting device 241. The second electrode 2402 of the first light-emitting device 241 is connected to the first node N1 and receives the second voltage signal.

[0147] Understandably, when the voltage value of the first data signal Data11 is different, the degree to which the second transistor T2 is turned on is different, resulting in unequal equivalent resistances of the second transistor T2. Consequently, the voltage values ​​of the first voltage signal transmitted through the second transistor T2 to the first electrode 2401 of the first light-emitting device 241 are unequal. Therefore, the first light-emitting device 241 can emit light of different brightness under the influence of the voltage difference between the first voltage signal and the electrical signal of the first node N1 (which can be the second voltage signal).

[0148] A scan signal Gate(n) is written to the third transistor T3 in the second sub-circuit 222. Under the control of the scan signal Gate(n), the third transistor T3 turns on, transmitting the second data signal Data12 to the control electrode of the fourth transistor T4. The fourth transistor T4, under the control of the second data signal Data12, turns on, transmitting the second voltage signal to the second node N2 via the fourth transistor T4. The second voltage signal is also transmitted from the first node N1 to the second node N2 via the second light-emitting device 242.

[0149] Understandably, when the voltage value of the second data signal Data12 is different, the degree to which the fourth transistor T4 is turned on is different, resulting in unequal equivalent resistances and unequal current values ​​flowing through the fourth transistor T4. Therefore, the second sub-circuit 222 can shunt the current flowing through the second light-emitting device 242, causing the second light-emitting device 242 to emit light of different brightness.

[0150] A scan signal Gate(n) is written to the fifth transistor T5 in the third sub-circuit 223. Under the control of the scan signal Gate(n), the fifth transistor T5 turns on, transmitting the third data signal Data13 to the control electrode of the sixth transistor T6. The sixth transistor T6, under the control of the third data signal Data13, turns on, transmitting the third voltage signal via the sixth transistor T6 to the second electrode 2402 of the third light-emitting device 243. The third voltage signal is also transmitted from the second node N2 via the third light-emitting device 243 to the second electrode 2402 of the third light-emitting device 243.

[0151] Understandably, when the voltage value of the third data signal Data13 is different, the opening degree of the sixth transistor T6 is different, resulting in unequal equivalent resistances and unequal current values ​​flowing through the sixth transistor T6. Therefore, the third sub-circuit 223 can shunt the current flowing through the third light-emitting device 243, causing the third light-emitting device 243 to emit light of different brightness.

[0152] In some examples, the brightness of the first light-emitting device 241 is positively correlated with the voltage value of the first data signal Data11. For example, the larger the voltage value of the first data signal Data11, the smaller the equivalent resistance of the second transistor T2 in the first sub-circuit 221, the larger the current flowing through the second transistor T2 and the first light-emitting device 241, and the greater the brightness of the first light-emitting device 241.

[0153] The brightness of the second light-emitting device 242 is negatively correlated with the voltage value of the second data signal Data12. For example, the larger the voltage value of the second data signal Data12, the larger the current flowing through the fourth transistor T4 in the second sub-circuit 222, and the smaller the current flowing through the second light-emitting device 242, the smaller the brightness of the second light-emitting device 242.

[0154] The brightness of the third light-emitting device 243 is negatively correlated with the voltage value of the third data signal Data13. For example, the larger the voltage value of the third data signal Data13, the larger the current flowing through the sixth transistor T6 in the third sub-circuit 223, and the smaller the current flowing through the third light-emitting device 243, the smaller the brightness of the third light-emitting device 243.

[0155] Therefore, by controlling the voltage values ​​of the first data signal Data11, the second data signal Data12, and the third data signal Data13 respectively, at least one of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 can emit light, or none of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 can emit light.

[0156] Some embodiments of this disclosure also provide a driving circuit 22, which is applied to the driving substrate 21 in the above embodiments. As shown in FIG11 and FIG18, the driving circuit 22 is used to drive the light-emitting unit 23, which includes a first light-emitting device 241, a second light-emitting device 242 and a third light-emitting device 243.

[0157] As shown in Figure 18, the second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are connected to the first node M1, and the second electrode 2402 of the second light-emitting device 242 and the first electrode 2401 of the third light-emitting device 243 are connected to the second node M2. This allows for a series connection between the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243. A single driving circuit 22 can be used to electrically connect the three light-emitting devices 24, driving them to achieve different light-emitting states. This helps reduce the power consumption of the driving circuit 22 and the driving substrate 21.

[0158] As shown in Figure 11, the driving circuit 22 includes: a first sub-circuit 221, a second sub-circuit 222, a third sub-circuit 223, and a fourth sub-circuit 224.

[0159] As shown in Figures 11 and 18, the first sub-circuit 221 is connected to the first electrode 2401 and the first voltage terminal V1 of the first light-emitting device 241. For example, the first sub-circuit 221 is also connected to the first data signal terminal D21 and the scan signal terminal S. The first sub-circuit 221 is configured to receive a first data signal from the first data signal terminal D21 and control the voltage of the first electrode 2401 of the first light-emitting device 241.

[0160] For example, under the action of the first data signal, the first voltage provided by the first voltage terminal V1, and the electrical signal of the first node M1, the first sub-circuit 221 controls the first light-emitting device 241 to emit light of different brightness.

[0161] The second sub-circuit 222 is connected to the first node M1 and the second voltage terminal V2. For example, the second sub-circuit 222 is also connected to the second data signal terminal D22 and the scan signal terminal S. The second sub-circuit 222 is configured to receive a second data signal from the second data signal terminal D22 and control the voltage of the first node M1. For example, under the action of the second data signal, the electrical signal of the first node M1, and the electrical signal of the second node M2, the second sub-circuit 222 controls the second light-emitting device 242 to emit light of different brightness.

[0162] The third sub-circuit 223 is connected to the second node M2, the second voltage terminal V2, and the third voltage terminal V3. For example, the third sub-circuit 223 is also connected to the third data signal terminal D23 and the scan signal terminal S. The third sub-circuit 223 is configured to receive the third data signal from the third data signal terminal D23 and control the voltage of the second node M2.

[0163] The fourth sub-circuit 224 is connected to the second electrode 2402, the third voltage terminal V3, and the fourth voltage terminal V4 of the third light-emitting device 243. For example, the fourth sub-circuit 224 is also connected to the fourth data signal terminal D24 and the scan signal terminal S. The fourth sub-circuit 224 is configured to receive a fourth data signal from the fourth data signal terminal D24 and control the voltage of the second electrode 2402 of the third light-emitting device 243. For example, under the influence of the third data signal, the fourth data signal, the electrical signal of the second node M2, and the voltage of the second electrode 2402 of the third light-emitting device 243, the third sub-circuit 223 and the fourth sub-circuit 224 control the third light-emitting device 243 to emit light of different brightness.

[0164] Thus, the light-emitting unit 23 is connected to the driving circuit 22, and under the action of the electrical signal of the driving circuit 22, the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243 emit light of different brightness, so that the same light-emitting unit 23 can emit light of different colors, thereby enabling one driving circuit 22 to control the light-emitting devices 24 to emit light. The number of driving circuits 22 in the light-emitting substrate 2 is relatively small, which helps to reduce the power consumption of the light-emitting substrate 2 and the display device.

[0165] For example, the first light-emitting device 241 can emit red light, the second light-emitting device 242 can emit green light, and the third light-emitting device 243 can emit blue light.

[0166] For example, the first light-emitting device 241 can emit blue light, the second light-emitting device 242 can emit green light, and the third light-emitting device 243 can emit red light.

[0167] In some embodiments, as shown in FIG12, the first sub-circuit 221 includes a first input unit 2213 and a first driving unit 2214.

[0168] The first input unit 2213 is connected to the scan signal terminal S, the first data signal terminal D21 and the first drive unit 2214, and is configured to transmit the first data signal from the first data signal terminal D21 to the first drive unit 2214 in response to the scan signal from the scan signal terminal S.

[0169] The first driving unit 2214 is also connected to the first electrode 2401, the first voltage terminal V1 and the reference voltage terminal VS of the first light-emitting device 241, and is configured to transmit the first voltage signal provided by the first voltage terminal V1 to the first electrode 2401 of the first light-emitting device 241 according to the first data signal.

[0170] Therefore, the first light-emitting device 241 can emit light of different brightness under the control of the first voltage signal and the electrical signal of the first node M1.

[0171] In some embodiments, as shown in FIG12 and FIG18, the first input unit 2213 includes a first transistor Q1, and the first driving unit 2214 includes a second transistor Q2 and a first capacitor C21.

[0172] The control electrode of the first transistor Q1 is connected to the scan signal terminal S, the first electrode of the first transistor Q1 is connected to the first data signal terminal D21, and the second electrode of the first transistor Q1 is connected to the control electrode of the second transistor Q2. For example, the first transistor Q1 is configured to transmit the first data signal to the control electrode of the second transistor Q2 under the control of the scan signal.

[0173] The first terminal of the second transistor Q2 is connected to the first voltage terminal V1, and the second terminal of the second transistor Q2 is connected to the first electrode 2401 of the first light-emitting device 241. For example, the second transistor Q2 is configured to transmit a first voltage signal to the first electrode 2401 of the first light-emitting device 241 under the control of the first data signal.

[0174] The first terminal of the first capacitor C21 is connected to the second terminal and the control terminal of the first transistor Q1, and the second terminal of the first capacitor C21 is connected to the reference voltage terminal VS.

[0175] Therefore, during the process of the first transistor Q1 transmitting the first data signal to the second transistor Q2, the first data signal can charge the first capacitor C21. After the first transistor Q1 is turned off, the first capacitor C21 can discharge to the control electrode of the second transistor Q2, so that the second transistor Q2 remains on and transmits the first voltage signal to the first electrode 2401 of the first light-emitting device 241.

[0176] For example, the electrical signal provided by the aforementioned reference voltage terminal VS can be a constant voltage signal. The third voltage terminal V3 can be reused as the reference voltage terminal VS.

[0177] In some embodiments, as shown in FIG13 and FIG18, the first sub-circuit 221 further includes a first control unit 2215.

[0178] The first driving unit 2214 is connected to the first voltage terminal V1 via the first control unit 2215, which is also connected to the enable signal terminal EM. The first control unit 2215 is configured to transmit the first voltage signal to the first driving unit 2214 under the control of the enable signal from the enable signal terminal EM, so as to at least control the light emission duration of the first light-emitting device 241.

[0179] For example, the first control unit 2215 controls the light emission duration of the first light-emitting device 241. Alternatively, the first control unit 2215 controls the light emission duration of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243.

[0180] For example, as shown in FIG18, the first control unit 2215 includes an eleventh transistor Q11. The control terminal of the eleventh transistor Q11 is connected to the enable signal terminal EM, its first terminal is connected to the first voltage terminal V1, and its second terminal is electrically connected to the first terminal of the second transistor Q2.

[0181] In some embodiments, as shown in FIG14, the second sub-circuit 222 includes a second input unit 2223 and a second driving unit 2224.

[0182] The second input unit 2223 is connected to the scan signal terminal S, the second data signal terminal D22 and the second drive unit 2224, and is configured to transmit the second data signal from the second data signal terminal D22 to the second drive unit 2224 in response to the scan signal from the scan signal terminal S.

[0183] The second drive unit 2224 is also connected to the first node M1, the second voltage terminal V2 and the reference voltage terminal VS, and is configured to transmit the second voltage signal provided by the second voltage terminal V2 to the first node M1 according to the second data signal.

[0184] Therefore, the second light-emitting device 242 can emit light of different brightness under the control of the electrical signal of the first node M1 and the electrical signal of the second node M2.

[0185] In some examples, as shown in Figures 14 and 18, the second input unit 2223 includes a third transistor Q3, and the second drive unit 2224 includes a fourth transistor Q4 and a second capacitor C22.

[0186] The control electrode of the third transistor Q3 is connected to the scan signal terminal S, the first electrode of the third transistor Q3 is connected to the second data signal terminal D22, and the second electrode of the third transistor Q3 is connected to the control electrode of the fourth transistor Q4. For example, the third transistor Q3 is configured to transmit the second data signal to the control electrode of the fourth transistor Q4 under the control of the scan signal.

[0187] The first terminal of the fourth transistor Q4 is connected to the second voltage terminal V2, and the second terminal of the fourth transistor Q4 is connected to the first node M1. For example, the fourth transistor Q4 is configured to transmit a second voltage signal to the first node M1 under the control of a second data signal.

[0188] The first terminal of the second capacitor C22 is connected to the second terminal of the third transistor Q3 and the control terminal of the fourth transistor Q4, and the second terminal of the second capacitor C22 is connected to the reference voltage terminal VS.

[0189] Therefore, during the process of the third transistor Q3 transmitting the second data signal to the fourth transistor Q4, the second data signal can charge the second capacitor C22. After the third transistor Q3 is turned off, the second capacitor C22 can discharge to the control electrode of the fourth transistor Q4, so that the fourth transistor Q4 remains on and transmits the second voltage signal to the first node M1.

[0190] In some embodiments, as shown in FIG15, the third sub-circuit 223 includes a third input unit 2233 and a third driving unit 2234.

[0191] The third input unit 2233 is connected to the scan signal terminal S, the third data signal terminal D23 and the third drive unit 2234, and is configured to transmit the third data signal from the third data signal terminal D23 to the third drive unit 2234 in response to the scan signal from the scan signal terminal S.

[0192] The third drive unit 2234 is also connected to the second node M2, the second voltage terminal V2, the third voltage terminal V3 and the reference voltage terminal VS, and is configured to transmit the second voltage signal provided by the second voltage terminal V2 or the third voltage signal provided by the third voltage terminal V3 to the second node M2 ​​according to the third data signal.

[0193] In some examples, as shown in Figures 15 and 18, the third input unit 2233 includes a fifth transistor Q5, and the third drive unit 2234 includes a sixth transistor Q6, a seventh transistor Q7, and a third capacitor C23. The sixth transistor Q6 and the seventh transistor Q7 have opposite switching types.

[0194] For example, the sixth transistor Q6 can be a P-type transistor, which conducts under the control of a low-level signal. The seventh transistor Q7 can be an N-type transistor, which conducts under the control of a high-level signal.

[0195] The control electrode of the fifth transistor Q5 is connected to the scan signal terminal S, the first electrode of the fifth transistor Q5 is connected to the third data signal terminal D23, and the second electrode of the fifth transistor Q5 is connected to the control electrode of the sixth transistor Q6 and the control electrode of the seventh transistor Q7.

[0196] For example, the fifth transistor Q5 is configured to transmit the third data signal to the control electrode of the sixth transistor Q6 and the control electrode of the seventh transistor Q7 under the control of the scan signal.

[0197] The first terminal of the sixth transistor Q6 is connected to the second voltage terminal V2, and the second terminal of the sixth transistor Q6 is connected to the second node M2. For example, the sixth transistor Q6 is configured to transmit a second voltage signal to the second node M2 ​​under the control of a third data signal.

[0198] The first terminal of the seventh transistor Q7 is connected to the third voltage terminal V3, and the second terminal of the seventh transistor Q7 is connected to the second node M2. For example, the seventh transistor Q7 is configured to transmit a third voltage signal to the second node M2 ​​under the control of a third data signal.

[0199] The first terminal of the third capacitor C23 is connected to the second terminal of the fifth transistor Q5, the control terminal of the sixth transistor Q6, and the control terminal of the seventh transistor Q7. The second terminal of the third capacitor C23 is connected to the reference voltage terminal VS.

[0200] Therefore, during the process of the fifth transistor Q5 transmitting the third data signal to the sixth transistor Q6 and the seventh transistor Q7, the third data signal can charge the third capacitor C23. After the fifth transistor Q5 is turned off, the third capacitor C23 can discharge to the control electrode of the sixth transistor Q6, keeping the sixth transistor Q6 in the on state and transmitting the second voltage signal to the second node M2. After the fifth transistor Q5 is turned off, the third capacitor C23 can discharge to the control electrode of the seventh transistor Q7, keeping the seventh transistor Q7 in the on state and transmitting the third voltage signal to the second node M2.

[0201] In some examples, as shown in Figure 16, the third sub-circuit 223 also includes a second control unit 2235.

[0202] The third driving unit 2234 is connected to the second node M2 ​​via the second control unit 2235, which is also connected to the enable signal terminal EM. The second control unit 2235 is configured to transmit a second voltage signal or a third voltage signal to the first electrode 2401 of the third light-emitting device 243, i.e., the second node M2, under the control of the enable signal from the enable signal terminal EM, so as to control the light emission duration of the second light-emitting device 242 and / or the third light-emitting device 243.

[0203] For example, the second control unit 2235 can control the light emission duration of the second light-emitting device 242 or the third light-emitting device 243. Alternatively, the second control unit 2235 can control the light emission duration of both the second light-emitting device 242 and the third light-emitting device 243.

[0204] For example, as shown in FIG18, the second control unit 2235 includes a twelfth transistor Q12. The control terminal of the twelfth transistor Q12 is connected to the enable signal terminal EM, its first terminal is connected to the second terminal of the sixth transistor Q6 and the second terminal of the seventh transistor Q7, and its second terminal is connected to the second node M2.

[0205] In some embodiments, as shown in FIG17, the fourth sub-circuit 224 includes a fourth input unit 2243 and a fourth driving unit 2244.

[0206] The fourth input unit 2243 is connected to the scan signal terminal S, the fourth data signal terminal D24 and the fourth drive unit 2244, and is configured to transmit the fourth data signal Data24 from the fourth data signal terminal D24 to the fourth drive unit 2244 in response to the scan signal from the scan signal terminal S.

[0207] The fourth driving unit 2244 is also connected to the second electrode 2402, the third voltage terminal V3, the fourth voltage terminal V4 and the reference voltage terminal VS of the third light-emitting device 243, and is configured to transmit the third voltage signal provided by the third voltage terminal V3 or the fourth voltage signal provided by the fourth voltage terminal V4 to the second electrode 2402 of the third light-emitting device 243 according to the fourth data signal.

[0208] Thus, the third light-emitting device 243 can emit light of different brightness under the control of the electrical signals of its second electrode 2402 and the second node M2.

[0209] In some examples, as shown in Figure 18, the fourth input unit 2243 includes an eighth transistor Q8, and the fourth drive unit 2244 includes a ninth transistor Q9, a tenth transistor Q10, and a fourth capacitor C24. The ninth transistor Q9 and the tenth transistor Q10 have opposite switching types.

[0210] For example, as shown in Figure 18, the ninth transistor Q9 can be a P-type transistor, which conducts under the control of a low-level signal. The tenth transistor Q10 can be an N-type transistor, which conducts under the control of a high-level signal.

[0211] For example, the ninth transistor Q9 can be an N-type transistor, and the tenth transistor Q10 can be a P-type transistor.

[0212] The control electrode of the eighth transistor Q8 is connected to the scan signal terminal S, the first electrode of the eighth transistor Q8 is connected to the fourth data signal terminal D24, and the second electrode of the eighth transistor Q8 is connected to the control electrodes of the ninth transistor Q9 and the tenth transistor Q10. For example, the eighth transistor Q8 is configured to transmit the fourth data signal to the control electrodes of the ninth transistor Q9 and the tenth transistor Q10 under the control of the scan signal.

[0213] The first terminal of the ninth transistor Q9 is connected to the third voltage terminal V3, and the second terminal of the ninth transistor Q9 is connected to the second electrode 2402 of the third light-emitting device 243. For example, the ninth transistor Q9 is configured to transmit the third voltage signal to the second electrode 2402 of the third light-emitting device 243 under the control of the fourth data signal.

[0214] The first terminal of the tenth transistor Q10 is connected to the fourth voltage terminal V4, and the second terminal of the tenth transistor Q10 is connected to the second electrode 2402 of the third light-emitting device 243. For example, the tenth transistor Q10 is configured to transmit a fourth voltage signal to the second electrode 2402 of the third light-emitting device 243 under the control of a fourth data signal.

[0215] The first terminal of the fourth capacitor C24 is connected to the second terminal of the eighth transistor Q8, the control terminal of the ninth transistor Q9, and the control terminal of the tenth transistor Q10. The second terminal of the fourth capacitor C24 is connected to the reference voltage terminal VS.

[0216] Therefore, during the process of the eighth transistor Q8 transmitting the fourth data signal to the ninth transistor Q9 and the tenth transistor Q10, the fourth data signal can charge the fourth capacitor C24. After the eighth transistor Q8 is turned off, the fourth capacitor C24 can discharge to the control electrode of the ninth transistor Q9, keeping the ninth transistor Q9 in the on state and transmitting the third voltage signal to the second electrode 2402 of the third light-emitting device 243. After the eighth transistor Q8 is turned off, the fourth capacitor C24 can discharge to the control electrode of the tenth transistor Q10, keeping the tenth transistor Q10 in the on state and transmitting the fourth voltage signal to the second electrode 2402 of the third light-emitting device 243.

[0217] In some examples, as shown in Figure 18, the voltage difference between the first voltage signal provided by the first voltage terminal V1 and the second voltage signal provided by the second voltage terminal V2 is greater than or equal to the threshold voltage of the first light-emitting device 241. Therefore, when the first electrode 2401 of the first light-emitting device 241 receives the first voltage and the second electrode 2402 receives the second voltage provided by the first node M1, the first light-emitting device 241 can emit light.

[0218] The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal V3 is greater than or equal to the threshold voltage of the second light-emitting device 242. Therefore, when the first electrode 2401 of the second light-emitting device 242 receives the second voltage from the first node M1 and the second electrode 2402 receives the third voltage provided by the second node M2, the second light-emitting device 242 can emit light.

[0219] The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal V4 is greater than or equal to the threshold voltage of the third light-emitting device 243. Therefore, when the first electrode 2401 of the third light-emitting device 243 receives the third voltage provided by the second node M2 ​​and the second electrode 2402 receives the fourth voltage, the third light-emitting device 243 can emit light.

[0220] Embodiments of this disclosure also provide a driving method for the light-emitting substrate 2, which can be applied to the driving circuit 22 of any of the above embodiments. The driving method includes:

[0221] Referring to Figures 18 and 19, first data signal Data21, second data signal Data22, third data signal Data23, and fourth data signal Data24 are input to the first sub-circuit 221, the second sub-circuit 222, the third sub-circuit 223, and the fourth sub-circuit 224, respectively, to control the voltage of the first electrode 2401, the first node M1, the second node M2, and the second electrode 2402 of the third light-emitting device 243, respectively, so that at least one of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 emits light, or none of them emit light.

[0222] In some examples, as shown in Figures 19 and 20, the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 all emit light, including:

[0223] The first data signal Data21 of the first state is input to the first sub-circuit 221 so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0224] Input the second data signal Data22 of the second state or the third state to the second sub-circuit 222 so that the first node M1 is disconnected from the second voltage terminal V2.

[0225] Input the third data signal Data23 of the second state to the third sub-circuit 223 so that the second node M2 ​​is disconnected from the second voltage terminal V2 and the third voltage terminal V3.

[0226] The fourth data signal Data24 of the first state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the fourth voltage.

[0227] For example, as shown in Figures 19 and 20, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 turns on, transmitting the first data signal Data21 of the first state to the control electrode of the second transistor Q2. Under the control of the enable signal, the eleventh transistor Q11 turns on, transmitting the first voltage signal to the first electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 turns on, transmitting the first voltage signal to the first electrode of the first light-emitting device 241, so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0228] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the second or third state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns off.

[0229] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the second state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 and the seventh transistor Q7 turn off.

[0230] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the first state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns off, and the tenth transistor Q10 turns on, transmitting the fourth voltage signal to the second electrode 2402 of the third light-emitting device 243, so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the fourth voltage.

[0231] Therefore, the path between the first voltage terminal V1, the second transistor Q2, the first light-emitting device 241, the second light-emitting device 242, the third light-emitting device 243, and the fourth voltage terminal V4 is turned on, causing the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 to emit light. Furthermore, the current path for the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 to emit light is the same current path, thereby saving power consumption of the driving circuit 22 and the driving substrate 21.

[0232] In some examples, at least one of the first data signal Data21, the second data signal Data22, the third data signal Data23, and the fourth data signal Data24 has a first state, a second state, and a third state.

[0233] For example, the first data signal Data21, the second data signal Data22, the third data signal Data23, or the fourth data signal Data24 may have a first state, a second state, and a third state. Alternatively, both the third data signal Data23 and the fourth data signal Data24 may have a first state, a second state, and a third state. Alternatively, both the first data signal Data21 and the second data signal Data22 may have a first state, a second state, and a third state. Alternatively, all three data signals may have a first state, a second state, and a third state. Alternatively, all three data signals may have a first state, a second state, and a third state.

[0234] The first state is the first level, the second state is the zero level, and the third state is the second level. The first level is greater than the zero level, and the second level is less than the zero level.

[0235] For example, the second transistor Q2, the fourth transistor Q4, the seventh transistor Q7, and the tenth transistor Q10 in the drive circuit 22 are all N-type transistors, which can be turned on under the data signal in the first state and turned off under the data signal in the second or third state. The sixth transistor Q6 and the ninth transistor Q9 can be P-type transistors, which can be turned on under the data signal in the third state and turned off under the data signal in the second or third state.

[0236] In some examples, as shown in Figures 19 and 21, the first light-emitting device 241 and the second light-emitting device 242 do not emit light, while the third light-emitting device 243 emits light, including:

[0237] Input a first data signal Data21 of the second or third state to the first sub-circuit 221 so that the first electrode 2401 of the first light-emitting device 241 is disconnected from the first voltage terminal V1.

[0238] Input the second data signal Data22 of the second state or the third state to the second sub-circuit 222 so that the first node M1 is disconnected from the second voltage terminal V2.

[0239] Input the third data signal Data23 of the first state to the third sub-circuit 223 so that the voltage of the second node M2 ​​is the third voltage.

[0240] The fourth data signal Data24 of the first state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the fourth voltage.

[0241] For example, as shown in Figures 19 and 21, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 is turned on, transmitting the first data signal Data21 of the second state or the third state to the control electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 is turned off.

[0242] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the second or third state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns off.

[0243] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the first state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 turns off, and the seventh transistor Q7 turns on, transmitting the third voltage signal to the first terminal of the twelfth transistor Q12. Under the control of the enable signal, the twelfth transistor Q12 turns on, transmitting the third voltage signal to the second node M2.

[0244] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the first state to the control electrode of the ninth transistor Q9 and the control electrode of the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns off, and the tenth transistor Q10 turns on, transmitting the fourth voltage signal to the second electrode 2402 of the third light-emitting device 243.

[0245] Therefore, the first electrode 2401 of the first light-emitting device 241 is disconnected from the first sub-circuit 221, the second light-emitting device 242 is disconnected from the first node M1, the first electrode 2401 of the third light-emitting device 243 receives the third voltage signal from the second node M2, the second electrode 2402 of the third light-emitting device 243 receives the fourth voltage signal, and the third light-emitting device 243 emits light under the action of the voltage difference between the third voltage signal and the fourth voltage signal.

[0246] In some examples, as shown in Figures 19 and 22, the first light-emitting device 241 and the third light-emitting device 243 do not emit light, while the second light-emitting device 242 emits light, including:

[0247] Input a first data signal Data21 of the second or third state to the first sub-circuit 221 so that the first electrode 2401 of the first light-emitting device 241 is disconnected from the first voltage terminal V1.

[0248] Input the second data signal Data22 of the first state into the second sub-circuit 222 so that the voltage of the first node M1 is the second voltage.

[0249] Input the third data signal Data23 of the first state to the third sub-circuit 223 so that the voltage of the second node M2 ​​is the third voltage.

[0250] The fourth data signal Data24 of the third state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0251] For example, as shown in Figures 19 and 22, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 is turned on, transmitting the first data signal Data21 of the second state or the third state to the control electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 is turned off.

[0252] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the first state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns on, transmitting the second voltage signal to the first node M1, so that the voltage of the first node M1 is the second voltage.

[0253] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the first state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 turns off, and the seventh transistor Q7 turns on, transmitting the third voltage signal to the first terminal of the twelfth transistor Q12. Under the control of the enable signal, the twelfth transistor Q12 turns on, transmitting the third voltage signal to the second node M2, so that the voltage of the second node M2 ​​is the third voltage.

[0254] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the third state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns on and the tenth transistor Q10 turns off, transmitting the third voltage signal to the second electrode 2402 of the third light-emitting device 243, so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0255] Therefore, the first electrode 2401 of the first light-emitting device 241 is disconnected from the first sub-circuit 221. The first electrode 2401 of the second light-emitting device 242 receives the second voltage transmitted from the first node M1, and the second electrode 2402 of the second light-emitting device 242 receives the third voltage signal from the second node M2. The second light-emitting device 242 emits light under the influence of the voltage difference between the second and third voltage signals. The first electrode 2401 of the third light-emitting device 243 receives the third voltage signal, and its second electrode 2402 also receives the third voltage signal. There is no voltage difference between the first electrode 2401 and the second electrode 2402 of the third light-emitting device 243, and the third light-emitting device 243 does not emit light.

[0256] In some examples, as shown in Figures 19 and 23, the second light-emitting device 242 and the third light-emitting device 243 do not emit light, while the first light-emitting device 241 emits light, including:

[0257] The first data signal Data21 of the first state is input to the first sub-circuit 221 so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0258] Input the second data signal Data22 of the first state into the second sub-circuit 222 so that the voltage of the first node M1 is the second voltage.

[0259] Input the third data signal Data23 of the second state to the third sub-circuit 223 so that the second node M2 ​​is disconnected from the second voltage terminal V2 and the third voltage terminal V3.

[0260] Input the fourth data signal Data24 of the second state to the fourth sub-circuit 224 so that the second electrode 2402 of the third light-emitting device 243 is disconnected from the third voltage terminal V3 and the fourth voltage terminal V4.

[0261] For example, as shown in Figures 19 and 23, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 turns on, transmitting the first data signal Data21 of the first state to the control electrode of the second transistor Q2. Under the control of the enable signal, the eleventh transistor Q11 turns on, transmitting the first voltage signal to the first electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 turns on, transmitting the first voltage signal to the first electrode of the first light-emitting device 241, so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0262] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the first state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns on, transmitting the second voltage signal to the first node M1, so that the voltage of the first node M1 is the second voltage.

[0263] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the second state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 and the seventh transistor Q7 turn off.

[0264] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the second state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns off, and the tenth transistor Q10 turns off.

[0265] Therefore, the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage, and the second electrode 2402 of the first light-emitting device 241 receives the second voltage transmitted by the first node M1. The first light-emitting device 241 emits light under the action of the voltage difference between the first voltage and the second voltage. The second electrode 2402 of the second light-emitting device 242 does not receive an electrical signal, and neither the first electrode 2401 nor the second electrode 2402 of the third light-emitting device 243 receives an electrical signal. Therefore, the second light-emitting device 242 and the third light-emitting device 243 do not emit light.

[0266] In some examples, as shown in Figures 19 and 24, the first light-emitting device 241 does not emit light, while the second light-emitting device 242 and the third light-emitting device 243 both emit light, including:

[0267] Input a first data signal Data21 of the second or third state to the first sub-circuit 221 so that the first electrode 2401 of the first light-emitting device 241 is disconnected from the first voltage terminal V1.

[0268] Input the second data signal Data22 of the first state into the second sub-circuit 222 so that the voltage of the first node M1 is the second voltage.

[0269] Input the third data signal Data23 of the second state to the third sub-circuit 223 so that the second node M2 ​​is disconnected from the second voltage terminal V2 and the third voltage terminal V3.

[0270] The fourth data signal Data24 of the first state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the fourth voltage.

[0271] For example, as shown in Figures 19 and 24, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 is turned on, transmitting the first data signal Data21 of the second state or the third state to the control electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 is turned off.

[0272] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the first state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns on, transmitting the second voltage signal to the first node M1, so that the voltage of the first node M1 is the second voltage.

[0273] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the second state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 and the seventh transistor Q7 turn off.

[0274] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the first state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns off, and the tenth transistor Q10 turns on, transmitting the fourth voltage signal to the second electrode 2402 of the third light-emitting device 243, so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the fourth voltage.

[0275] Therefore, the first electrode 2401 of the first light-emitting device 241 is disconnected from the first sub-circuit 221, causing the first light-emitting device 241 to stop emitting light. The first electrode 2401 of the second light-emitting device 242 receives a second voltage from the first node M1, and the second electrode 2402 of the third light-emitting device 243 receives a fourth voltage. The second light-emitting device 242 and the third light-emitting device 243 are connected in series and form a conductive path under the action of the second and fourth voltages, causing both the second light-emitting device 242 and the third light-emitting device 243 to emit light. Furthermore, the current path for the second light-emitting device 242 and the third light-emitting device 243 to emit light is the same current path, thereby saving power consumption of the driving circuit 22 and the driving substrate 21.

[0276] In some examples, as shown in Figures 19 and 25, the third light-emitting device 243 does not emit light, while the first light-emitting device 241 and the second light-emitting device 242 both emit light, including:

[0277] The first data signal Data21 of the first state is input to the first sub-circuit 221 so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0278] Input the second data signal Data22 of the second state or the third state to the second sub-circuit 222 so that the first node M1 is disconnected from the second voltage terminal V2.

[0279] Input the third data signal Data23 of the first state to the third sub-circuit 223 so that the voltage of the second node M2 ​​is the third voltage.

[0280] The fourth data signal Data24 of the third state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0281] For example, as shown in Figures 19 and 25, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 turns on, transmitting the first data signal Data21 of the first state to the control electrode of the second transistor Q2. Under the control of the enable signal, the eleventh transistor Q11 turns on, transmitting the first voltage signal to the first electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 turns on, transmitting the first voltage signal to the first electrode of the first light-emitting device 241, so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0282] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the second or third state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns off.

[0283] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the first state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 turns off, and the seventh transistor Q7 turns on, transmitting the third voltage signal to the first terminal of the twelfth transistor Q12. Under the control of the enable signal, the twelfth transistor Q12 turns on, transmitting the third voltage signal to the second node M2, so that the voltage of the second node M2 ​​is the third voltage.

[0284] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the third state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns on and the tenth transistor Q10 turns off, transmitting the third voltage signal to the second electrode 2402 of the third light-emitting device 243, so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0285] Therefore, the voltages of the first electrode 2401 and the second electrode 2402 of the third light-emitting device 243 are both the third voltage, and the third light-emitting device 243 does not emit light. The voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage. The second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are connected through the first node M1. The voltage of the second electrode 2402 of the second light-emitting device 242 is the third voltage. The first light-emitting device 241 and the second light-emitting device 242 are connected in series and emit light under the action of the first voltage and the third voltage. Furthermore, the current path for the first light-emitting device 241 and the second light-emitting device 242 to emit light is the same current path, thereby saving power consumption of the driving circuit 22 and the driving substrate 21.

[0286] In some examples, as shown in Figures 19 and 26, the second light-emitting device 242 does not emit light, while the first light-emitting device 241 and the third light-emitting device 243 both emit light, including:

[0287] The first data signal Data21 of the first state is input to the first sub-circuit 221 so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0288] Input the second data signal Data22 of the first state into the second sub-circuit 222 so that the voltage of the first node M1 is the second voltage.

[0289] Input the third data signal Data23 of the third state to the third sub-circuit 223 so that the voltage of the second node M2 ​​is the second voltage.

[0290] The fourth data signal Data24 of the third state is input to the fourth sub-circuit 224 so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0291] For example, as shown in Figures 19 and 26, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 turns on, transmitting the first data signal Data21 of the first state to the control electrode of the second transistor Q2. Under the control of the enable signal, the eleventh transistor Q11 turns on, transmitting the first voltage signal to the first electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 turns on, transmitting the first voltage signal to the first electrode of the first light-emitting device 241, so that the voltage of the first electrode 2401 of the first light-emitting device 241 is the first voltage.

[0292] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the first state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns on, transmitting the second voltage signal to the first node M1, so that the voltage of the first node M1 is the second voltage.

[0293] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the third state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the seventh transistor Q7 turns off, and the sixth transistor Q6 turns on, transmitting the second voltage signal to the first terminal of the twelfth transistor Q12. Under the control of the enable signal, the twelfth transistor Q12 turns on, transmitting the second voltage signal to the second node M2, so that the voltage of the second node M2 ​​is the second voltage.

[0294] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the third state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns on and the tenth transistor Q10 turns off, transmitting the third voltage signal to the second electrode 2402 of the third light-emitting device 243, so that the voltage of the second electrode 2402 of the third light-emitting device 243 is the third voltage.

[0295] Therefore, the first electrode 2401 of the second light-emitting device 242 receives the second voltage of the first node M1, and its second electrode 2402 receives the second voltage of the second node M2. There is no voltage difference between the first electrode 2401 and the second electrode 2402 of the second light-emitting device 242, and the second light-emitting device 242 does not emit light. The first electrode 2401 of the first light-emitting device 241 receives the first voltage, and its second electrode 2402 receives the second voltage of the second node M2. The first light-emitting device 241 emits light under the action of the voltage difference between the first voltage and the second voltage. The first electrode 2401 of the third light-emitting device 243 receives the second voltage of the second node M2, and its second electrode 2402 receives the third voltage. The third light-emitting device 243 emits light under the action of the voltage difference between the second voltage and the third voltage.

[0296] In some examples, as shown in Figures 19 and 27, the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 do not emit light, including:

[0297] Input a first data signal Data21 of the second or third state to the first sub-circuit 221 so that the first electrode 2401 of the first light-emitting device 241 is disconnected from the first voltage terminal V1.

[0298] Input the second data signal Data22 of the second state or the third state to the second sub-circuit 222 so that the first node M1 is disconnected from the second voltage terminal V2.

[0299] Input the third data signal Data23 of the second state to the third sub-circuit 223 so that the second node M2 ​​is disconnected from the second voltage terminal V2 and the third voltage terminal V3.

[0300] Input the fourth data signal Data24 of the second state to the fourth sub-circuit 224 so that the second electrode 2402 of the third light-emitting device 243 is disconnected from the third voltage terminal V3 and the fourth voltage terminal V4.

[0301] For example, under the control of the scan signal Gate(n), the first transistor Q1 in the first sub-circuit 221 is turned on, transmitting the first data signal Data21 of the second state or the third state to the control electrode of the second transistor Q2. Under the control of the first data signal Data21, the second transistor Q2 is turned off.

[0302] Under the control of the scan signal Gate(n), the third transistor Q3 in the second sub-circuit 222 turns on, transmitting the second data signal Data22 of the second or third state to the control electrode of the fourth transistor Q4. Under the control of the second data signal Data22, the fourth transistor Q4 turns off.

[0303] Under the control of the scan signal Gate(n), the fifth transistor Q5 in the third sub-circuit 223 turns on, transmitting the third data signal Data23 of the second state to the control terminals of the sixth transistor Q6 and the seventh transistor Q7. Under the control of the third data signal Data23, the sixth transistor Q6 and the seventh transistor Q7 turn off.

[0304] Under the control of the scan signal Gate(n), the eighth transistor Q8 in the fourth sub-circuit 224 turns on, transmitting the fourth data signal Data24 in the second state to the control terminals of the ninth transistor Q9 and the tenth transistor Q10. Under the control of the fourth data signal Data24, the ninth transistor Q9 turns off, and the tenth transistor Q10 turns off.

[0305] Therefore, the first light-emitting device 241 is disconnected from the first sub-circuit 221, and the first light-emitting device 241 does not emit light. The second light-emitting device 242 is disconnected from the second sub-circuit 222 and the third sub-circuit 223, and the second light-emitting device 242 does not emit light. The third light-emitting device 243 is disconnected from the third sub-circuit 223 and the fourth sub-circuit 224, and the third light-emitting device 243 does not emit light.

[0306] The embodiments of this disclosure also provide a light-emitting substrate 2, which is applied to the display device described in any of the above embodiments.

[0307] Specifically, as shown in Figures 28 to 30, the light-emitting substrate 2 includes: a driving substrate 21, a light-emitting unit 23, and a plurality of connecting posts 25.

[0308] In some examples, the driving substrate 21 includes a plurality of driving circuits 22. At least one driving circuit 22 is the driving circuit 22 described in any of the above embodiments.

[0309] For example, at least one of the plurality of driving circuits 22 includes a first sub-circuit 221, a second sub-circuit 222, and a third sub-circuit 223.

[0310] Multiple light-emitting units 23 are disposed on the driving substrate 21. The driving circuit 22 is used to drive one light-emitting unit 23. The light-emitting unit 23 includes multiple light-emitting devices 24, and the multiple light-emitting devices 24 include a first light-emitting device 241, a second light-emitting device 242 and a third light-emitting device 243 stacked sequentially along a first direction Z, where the first direction Z is the thickness direction of the driving substrate 21.

[0311] As shown in Figures 5 and 9, the first sub-circuit 221 is connected to the scanning signal terminal, the first electrode 2401 of the first light-emitting device 241, the first voltage terminal V1, and the first node N1. The first node N1 is connected to the second voltage terminal V2, the second electrode 2402 of the first light-emitting device 241, and the first electrode 2401 of the second light-emitting device 242. The first sub-circuit 221 is configured to receive a first data signal under the control of the scanning signal terminal. The second sub-circuit 222 is connected to the scanning signal terminal, the first node N1, and the second node N2. The second node N2 is connected to the third voltage terminal V3, the second electrode 2402 of the second light-emitting device 242, and the first electrode 2401 of the third light-emitting device 243. The second sub-circuit 222 is configured to receive a second data signal under the control of the scanning signal terminal. The third sub-circuit 223 is connected to the scanning signal terminal, the second node N2, and the second electrode 2402 of the third light-emitting device 243. The second electrode 2402 of the third light-emitting device 24 is connected to the fourth voltage terminal V4. The third sub-circuit 223 is configured to receive a third data signal under the control of the scanning signal terminal.

[0312] As shown in Figures 28 to 30, a plurality of connecting posts 25 extend along a first direction Z. The plurality of connecting posts 25 include a first connecting post 251 and a second connecting post 252. The second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are electrically connected through the first connecting post 251. The second electrode 2402 of the second light-emitting device 242 and the first electrode 2401 of the third light-emitting device 243 are electrically connected through the second connecting post 252.

[0313] In Figure 29, the second electrode 2402 of the second light-emitting device 242 (the third sub-part 24C in the second electrode 2402 in Figure 29) bypasses the eighth connecting post 258 and is connected to the second connecting post 252.

[0314] Therefore, the driving circuit 22 can drive multiple light-emitting devices 24 to emit light.

[0315] The light-emitting substrate 2 provided in the embodiments of this disclosure is provided with a first connecting post 251 and a second connecting post 252 to realize the series connection between the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243. The first sub-circuit 221, the second sub-circuit 222 and the third sub-circuit 223 in the driving circuit 22 are connected to the light-emitting unit 23, so that the same driving circuit 22 drives the light emission of multiple light-emitting devices 24. This makes the number of driving circuits 22 provided on the driving substrate 21 relatively small, which is beneficial to reduce the power consumption of the driving substrate 21 and the light-emitting substrate 2.

[0316] Furthermore, referring to Figure 28, the connecting post 25 can serve as a heat dissipation channel within the light-emitting unit 23 (dashed arrow in Figure 28), allowing heat within the light-emitting unit 23 to be conducted along the connecting post 25 to the driving substrate 21, etc. For example, heat within the third light-emitting device 243 can be conducted through the second connecting post 252 to the second light-emitting device 242, and then through the first connecting post 251 to the first light-emitting device 241, increasing the number of heat dissipation channels for different light-emitting devices, thus increasing the number of heat dissipation channels, and allowing each heat dissipation channel to be interconnected to form a heat dissipation network, thereby improving the heat dissipation capacity of the light-emitting substrate 2, which is beneficial for improving the light-emitting lifespan of the light-emitting device 24 and the light-emitting substrate 2, etc.

[0317] The embodiments of this disclosure also provide another light-emitting substrate 2, which is applied to the display device described in any of the above embodiments.

[0318] Specifically, as shown in Figures 28 to 30, the light-emitting substrate 2 includes: a driving substrate 21, a light-emitting unit 23, and a plurality of connecting posts 25.

[0319] In some examples, the driving substrate 21 includes a plurality of driving circuits 22. At least one driving circuit 22 is the driving circuit 22 described in any of the above embodiments.

[0320] For example, at least one of the plurality of driving circuits 22 includes a first sub-circuit 221, a second sub-circuit 222, and a third sub-circuit 223.

[0321] Multiple light-emitting units 23 are disposed on the driving substrate 21. The driving circuit 22 is used to drive one light-emitting unit 23. The light-emitting unit 23 includes multiple light-emitting devices 24, and the multiple light-emitting devices 24 include a first light-emitting device 241, a second light-emitting device 242 and a third light-emitting device 243 stacked sequentially along a first direction Z, where the first direction Z is the thickness direction of the driving substrate 21.

[0322] As shown in Figures 11 and 18, the first sub-circuit 221 is connected to the first electrode and the first voltage terminal V1 of the first light-emitting device 241. The first sub-circuit 221 is configured to receive a first data signal and control the voltage of the first electrode of the first light-emitting device 241. The second sub-circuit 222 is connected to the first node M1 and the second voltage terminal V2. The second sub-circuit 222 is configured to receive a second data signal and control the voltage of the first node M1. The third sub-circuit 223 is connected to the second node M2, the second voltage terminal V2, and the third voltage terminal V3. The third sub-circuit 223 is configured to receive a third data signal and control the voltage of the second node M2. The fourth sub-circuit 224 is connected to the second electrode, the third voltage terminal V3, and the fourth voltage terminal V4 of the third light-emitting device 243. The fourth sub-circuit 224 is configured to receive a fourth data signal and control the voltage of the second electrode of the third light-emitting device 243.

[0323] As shown in Figures 28 to 30, a plurality of connecting posts 25 extend along a first direction Z. The plurality of connecting posts 25 include a first connecting post 251 and a second connecting post 252. The second electrode 2402 of the first light-emitting device 241 and the first electrode 2401 of the second light-emitting device 242 are electrically connected through the first connecting post 251. The second electrode 2402 of the second light-emitting device 242 and the first electrode 2401 of the third light-emitting device 243 are electrically connected through the second connecting post 252.

[0324] The light-emitting substrate 2 provided in the embodiments of this disclosure is provided with a first connecting post 251 and a second connecting post 252 to realize the series connection between the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243. Furthermore, the first sub-circuit 221, the second sub-circuit 222 and the third sub-circuit 223 in the driving circuit 22 are connected to the light-emitting unit 23, so that the same driving circuit 22 drives the light emission of multiple light-emitting devices 24. This reduces the number of driving circuits 22 on the driving substrate 21, which helps to save power consumption of the driving substrate 21 and the light-emitting substrate 2. Moreover, the three light-emitting devices 24 emit light through the same current path, which can further save power consumption of the driving substrate 21 and the light-emitting substrate 2.

[0325] In addition, the connecting post 25 can serve as a heat dissipation channel within the light-emitting unit 23, allowing heat within the light-emitting unit 23 to be conducted along the connecting post 25 to the driving substrate 21, etc. For example, heat within the third light-emitting device 243 can be conducted through the second connecting post 252 to the second light-emitting device 242, and then through the first connecting post 251 to the first light-emitting device 241, increasing the number of heat dissipation channels for different light-emitting devices, thus increasing the number of heat dissipation channels, and allowing each heat dissipation channel to be interconnected to form a heat dissipation network, thereby improving the heat dissipation capacity of the light-emitting substrate 2, which is beneficial for improving the light-emitting lifespan of the light-emitting device 24 and the light-emitting substrate 2, etc.

[0326] For example, as shown in Figures 28-30, the orthographic projections of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 on the driving substrate 21 overlap or nearly overlap. This results in a relatively small area occupied by the orthographic projections of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 on the driving substrate 21. Within a unit area on the plane of the driving substrate 21, a larger number of light-emitting units 23 composed of the first light-emitting device 241, the second light-emitting device 242, and the third light-emitting device 243 can be arranged, resulting in a higher arrangement density of the light-emitting units 23, which in turn helps to improve the pixel density of the light-emitting substrate 2.

[0327] In some examples, as shown in Figure 29, the connecting post 25 includes a main body portion 2503 and an auxiliary layer 2504, with the auxiliary layer 2504 covering the main body portion 2503. The connecting post 25 is electrically connected to the first electrode 2401 or the second electrode 2402 of the light-emitting device 24 through the auxiliary layer 2504.

[0328] For example, the connecting post 25 is made of a conductive material, the main body 2503 can be made of metallic copper, and the auxiliary layer 2504 can be a double-layer structure consisting of thallium nitride and thallium materials.

[0329] For example, the thickness of the auxiliary layer 2504 can range from 50 nm to 100 nm.

[0330] Therefore, the auxiliary layer 2504 can be used to protect the main body material, improve the accuracy of the shape of the connecting pillar formed during the preparation process, avoid the diffusion of the main body material (such as copper), and avoid the phenomenon that the shape of the connecting pillar differs greatly from the preset shape due to the diffusion of the main body material, which could lead to short circuits between the connecting pillar and other conductive structures.

[0331] In some embodiments, one of the first electrode 2401 and the second electrode 2402 of the light-emitting device 24 is a negative electrode, and the other is a positive electrode. Specifically, in the same light-emitting device, the positive electrode of the first electrode and the second electrode is positioned closer to the driving substrate.

[0332] In some examples, as shown in Figure 29, the first electrode 2401 of the light-emitting device 24 is the negative electrode, and the second electrode 2402 of the light-emitting device 24 is the positive electrode. In the same light-emitting device 24, the second electrode 2402 is closer to the driving substrate 21 than the first electrode 2401.

[0333] In other examples, as shown in Figures 28 and 30, the first electrode 2401 of the light-emitting device 24 is the positive electrode, and the second electrode 2402 of the light-emitting device 24 is the negative electrode. In the same light-emitting device 24, the first electrode 2401 is closer to the driving substrate 21 than the second electrode 2402.

[0334] In some embodiments, as shown in FIG28, the light-emitting substrate 2 further includes a first dielectric layer 261, a second dielectric layer 262, and a third dielectric layer 263. The first dielectric layer 261 surrounds the first light-emitting device 241, the second dielectric layer 262 surrounds the second light-emitting device 242, and the third dielectric layer 263 surrounds the third light-emitting device 243.

[0335] For example, the dimension of the first dielectric layer 261 along the first direction Z is equal to or approximately equal to the dimension of the first light-emitting device 241 along the first direction Z. The first dielectric layer 261 surrounds the first light-emitting device 241. The dimension of the second dielectric layer 262 along the first direction Z is equal to or approximately equal to the dimension of the second light-emitting device 242 along the first direction Z. The second dielectric layer 262 surrounds the second light-emitting device 242. The dimension of the third dielectric layer 263 along the first direction Z is equal to or approximately equal to the dimension of the third light-emitting device 243 along the first direction Z. The third dielectric layer 263 surrounds the third light-emitting device 243.

[0336] The material of the first dielectric layer 261 can be an insulating material, optionally including at least one of silicon oxide, silicon nitride, and silicon carbonitride. The materials of the first dielectric layer 261, the second dielectric layer 262, and the third dielectric layer 263 can be the same.

[0337] As shown in Figure 28, the first connecting post 251 is located beside the second light-emitting device 242 and penetrates the second dielectric layer 262.

[0338] For example, there is a certain distance between the first connecting post 251 and the second light-emitting device 242.

[0339] As shown in Figure 28, the second connecting post 252 is located beside the third light-emitting device 243 and penetrates the third dielectric layer 263. For example, there is a certain distance between the second connecting post 252 and the third light-emitting device 243.

[0340] For example, the material of the third dielectric layer 263 can be an insulating material. Optionally, the material of the third dielectric layer 263 can be the same as the material of the second dielectric layer 262.

[0341] Therefore, the angle of light emitted by the light-emitting device can be adjusted using the first connecting post 251 and the second connecting post 252. For example, the first connecting post 251 can reflect and scatter the light emitted by the second light-emitting device 242, so that the light emitted by the second light-emitting device 242 and directed towards its surroundings is converted into light surrounding the second light-emitting device 242 after being reflected and scattered by the first connecting post 251 next to the second light-emitting device, and then emitted. This results in the light emitted from the light-emitting surface of the light-emitting unit by the second light-emitting device 242 having a smaller angle of view. Similarly, the second connecting post 252 can reflect and scatter the light emitted by the third light-emitting device 243, so that the light emitted by the third light-emitting device 243 and directed towards its surroundings is converted into light surrounding the third light-emitting device 243 after being reflected and scattered by the second connecting post 252 next to the third light-emitting device, and then emitted. This results in the light emitted from the light-emitting surface of the light-emitting unit by the third light-emitting device 243 having a smaller angle of view, making the light emitted by the light-emitting unit more focused, which is beneficial to improving the display effect of the light-emitting substrate.

[0342] In some examples, as shown in Figures 28 to 30, the plurality of connecting posts 25 further include a third connecting post 253, which is used to electrically connect the second electrode 2402 of the first light-emitting device 241 and the driving substrate 21.

[0343] For example, taking the first electrode 2401 of the light-emitting device 24 as the positive electrode and the second electrode 2402 of the light-emitting device 24 as the negative electrode, the second electrode 2402 of the first light-emitting device 241 is connected to the second voltage terminal in the driving substrate 21.

[0344] There are various relative positional relationships between the third connecting post 253 and the first light-emitting device 241, which can be selected and set according to actual needs. The embodiments disclosed herein do not limit this.

[0345] In some examples, as shown in Figure 29, the first light-emitting device 241 is closer to the driving substrate 21 than the third light-emitting device 243. The orthographic projection of the third connecting post 253 on the driving substrate 21 is within the orthographic projection range of the first light-emitting device 241 on the driving substrate 21.

[0346] Therefore, the area of ​​the overall structure consisting of the first light-emitting device 241 and the third connecting post 253 projected onto the driving substrate 21 is smaller, which allows for a larger number of overall structures consisting of the first light-emitting device 241 and the third connecting post 253 to be set within a unit area on the plane of the driving substrate 21, and a larger number of light-emitting units 23 to be set, resulting in a higher arrangement density of light-emitting units 23, which in turn helps to improve the pixel density of the light-emitting substrate 2.

[0347] In other examples, as shown in FIG28, the light-emitting substrate 2 further includes a first dielectric layer 261 surrounding the first light-emitting device 241, and a third connecting post 253 located beside the first light-emitting device 241 and penetrating the first dielectric layer 261.

[0348] Therefore, the angle of the light emitted by the first light-emitting device 241 can be adjusted by using the third connecting post 253. The third connecting post 253 reflects and scatters the light emitted by the first light-emitting device 241, so that the light emitted by the first light-emitting device 241 and directed towards its surroundings is reflected and scattered by the third connecting post 253 next to the first light-emitting device 241 and then emitted. This makes the light emitted from the light-emitting surface of the first light-emitting device 241 a light with a smaller angle, and makes the light emitted by the light-emitting unit more focused, which is beneficial to improving the display effect of the light-emitting substrate.

[0349] Along the first direction Z, as shown in Figure 28, the third connecting post 253 is connected to the first connecting post 251, and the orthographic projection of the third connecting post 253 on the driving substrate 21 at least partially overlaps with the orthographic projection of the first connecting post 251 on the driving substrate 21. This facilitates the electrical connection between the third connecting post 253 and the first connecting post 251, and makes the area occupied by the orthographic projections of the third connecting post 253 and the first connecting post 251 on the plane of the driving substrate 21 relatively small, which is beneficial for increasing the arrangement density of the light-emitting units 23 and the pixel density of the light-emitting substrate 2.

[0350] In some examples, as shown in FIG28, the plurality of connecting posts 25 further include: a first connecting structure 25A, the first connecting structure 25A being used to electrically connect the second electrode 2402 of the second light-emitting device 242 and the driving substrate 21.

[0351] Taking the first electrode 2401 of the light-emitting device 24 as the positive electrode and the second electrode 2402 of the light-emitting device 24 as the negative electrode as an example, the second electrode 2402 of the second light-emitting device 242 is connected to the third voltage terminal in the driving substrate 21 through the first connection structure.

[0352] The first connecting structure 25A has various structures, which can be selected and set according to actual needs. The embodiments disclosed herein do not limit this.

[0353] For example, as shown in FIG28, the first connection structure 25A includes a fourth connection post 254 and a fifth connection post 255, the fourth connection post 254 passing through the first dielectric layer 261 surrounding the first light-emitting device 241, and the fifth connection post 255 passing through the second dielectric layer 262 surrounding the second light-emitting device 242.

[0354] Along the first direction, the fourth connecting post 254 is connected to the fifth connecting post 255, and the orthographic projection of the fourth connecting post 254 on the driving substrate 21 at least partially overlaps with the orthographic projection of the fifth connecting post 255 on the driving substrate 21. This facilitates the connection between the fourth connecting post 254 and the fifth connecting post 255, and makes the area occupied by the orthographic projection of the first connecting structure on the plane of the driving substrate 21 relatively small, which is beneficial to increasing the arrangement density of the light-emitting units 23 and the pixel density of the light-emitting substrate 2.

[0355] For example, as shown in FIG28, along the first direction, the second connecting post 252 is connected to the fifth connecting post 255, and the orthographic projection of the second connecting post 252 on the driving substrate 21 at least partially overlaps with the orthographic projection of the fifth connecting post 255 on the driving substrate 21. Thus, the first electrode 2401 of the third light-emitting device 243 is connected to the driving substrate 21 via the second connecting post 252 and the first connecting structure. Furthermore, the area occupied by the orthographic projection of the first connecting structure and the second connecting post 252 on the plane of the driving substrate 21 is relatively small, which is beneficial to increasing the arrangement density of the light-emitting units 23 and the pixel density of the light-emitting substrate 2.

[0356] In some examples, as shown in Figures 28 to 30, the plurality of connecting posts 25 further include a sixth connecting post 256, which is used to electrically connect the first electrode 2401 of the first light-emitting device 241 and the driving substrate 21.

[0357] For example, taking the first electrode 2401 of the light-emitting device 24 as the positive electrode and the second electrode 2402 of the light-emitting device 24 as the negative electrode, the first electrode 2401 of the first light-emitting device 241 is connected to the first sub-circuit 221 in the driving substrate 21 via the sixth connecting post 256.

[0358] There are various relative positional relationships between the third connecting post 253 and the first light-emitting device 241, which can be selected and set according to actual needs. The embodiments disclosed herein do not limit this.

[0359] In some examples, as shown in Figure 28, the first light-emitting device 241 is closer to the driving substrate 21 than the third light-emitting device 243. The orthographic projection of the sixth connecting post 256 onto the driving substrate 21 is within the orthographic projection range of the first light-emitting device 241 onto the driving substrate 21.

[0360] Therefore, the area of ​​the orthographic projection of the whole consisting of the first light-emitting device 241 and the sixth connecting post 256 on the driving substrate 21 can be small, so that the number of the whole consisting of the first light-emitting device 241 and the sixth connecting post 256 can be set in a unit area on the plane of the driving substrate 21, resulting in a larger density of light-emitting units 23, which in turn helps to improve the pixel density of the light-emitting substrate 2.

[0361] In other examples, as shown in Figure 29, the sixth connecting post 256 is located beside the first light-emitting device 241 and extends through the first dielectric layer 261 surrounding the first light-emitting device 241.

[0362] Therefore, the angle of the light emitted by the first light-emitting device 241 can be adjusted by using the sixth connecting post 256, so that the light emitted from the light-emitting surface of the first light-emitting device 241 is light with a smaller angle, making the light emitted by the light-emitting unit more focused, which is beneficial to improving the display effect of the light-emitting substrate.

[0363] In some examples, as shown in Figures 28 to 30, the plurality of connecting posts 25 further include a second connecting structure 25B, which is used to electrically connect the second electrode 2402 of the third light-emitting device 243 and the driving substrate 21.

[0364] For example, taking the first electrode 2401 of the light-emitting device 24 as the positive electrode and the second electrode 2402 of the light-emitting device 24 as the negative electrode, the second electrode 2402 of the third light-emitting device 243 is connected to the fourth voltage terminal in the driving substrate 21 through the second connection structure.

[0365] The second connecting structure 25B has various structures, which can be selected and set according to actual needs. The embodiments disclosed herein do not limit this.

[0366] For example, as shown in Figures 28 to 30, the second connection structure 25B includes a seventh connection post 257, an eighth connection post 258, and a ninth connection post 259. The seventh connection post 257 passes through the first dielectric layer 261 surrounding the first light-emitting device 241, the eighth connection post 258 passes through the second dielectric layer 262 surrounding the second light-emitting device 242, and the ninth connection post 259 passes through the third dielectric layer 263 surrounding the third light-emitting device 243.

[0367] As shown in Figures 28-30, along the first direction Z, the seventh connecting post 257 and the eighth connecting post 258 are connected, and the orthographic projection of the seventh connecting post 257 on the driving substrate 21 at least partially overlaps with the orthographic projection of the eighth connecting post 258 on the driving substrate 21. Along the first direction Z, the eighth connecting post 258 and the ninth connecting post 259 are connected, and the orthographic projection of the ninth connecting post 259 on the driving substrate 21 at least partially overlaps with the orthographic projection of the eighth connecting post 258 on the driving substrate 21.

[0368] For example, the seventh connecting post 257 and the eighth connecting post 258 partially overlap in their orthographic projections on the driving substrate 21.

[0369] Therefore, the area of ​​the orthographic projection of the second connection structure 25B on the driving substrate 21 is smaller, and the number of light-emitting units 23 can be set in a unit area on the plane of the driving substrate 21, resulting in a larger arrangement density of light-emitting units 23, which in turn helps to improve the pixel density of the light-emitting substrate 2.

[0370] It is understood that the cross-sectional structural diagrams of the light-emitting substrate provided in the above embodiments of this disclosure (e.g., Figures 28 to 30) are only used to schematically show the relative positional relationship and connection relationship of each structure (which may be a connecting post and a light-emitting device, etc.) in the light-emitting substrate, and do not necessarily constitute the actual cross-sectional structure of the light-emitting substrate along a certain section provided in the embodiments of this disclosure.

[0371] For example, the orthographic projection shape of the light-emitting device 24 on the driving substrate can be varied, and can be selected and set according to the actual situation. Similarly, the orthographic projection shape of the connecting post 25 on the driving substrate can be varied, and can be selected and set according to the actual situation. Figure 31 is a schematic diagram of various planar positional relationships of the light-emitting device 24 (or light-emitting unit 23) and the connecting post 25 connected to the light-emitting device in the light-emitting substrate provided in Figure 28.

[0372] For example, as shown in Figures 31(a) and 31(c), the orthographic projection shape of the light-emitting device 24 on the driving substrate can be circular, and the orthographic projection shape of the connecting post 25 on the driving substrate can also be circular.

[0373] For example, as shown in Figures 31(b) and 31(d), the orthographic projection shape of the light-emitting device 24 on the driving substrate can be rectangular, and the orthographic projection shape of the connecting post 25 on the driving substrate can also be rectangular.

[0374] For example, the orthographic projection shape of the light-emitting device 24 on the driving substrate can be a polygon, and the orthographic projection shape of the connecting post 25 on the driving substrate can also be a circle.

[0375] In Figure 28, the orthographic projection of the sixth connecting post 256 on the driving substrate lies within the orthographic projection range of the light-emitting device 24 on the driving substrate. The orthographic projections of the remaining connecting posts 25 on the driving substrate lie around the orthographic projections of the light-emitting device 24 on the driving substrate.

[0376] For example, referring to Figures 28 and 31, the orthographic projection of the first connecting structure 25A on the driving substrate coincides with or substantially coincides with the orthographic projection of the second connecting post 252 on the driving substrate. The orthographic projection of the third connecting post 253 on the driving substrate coincides with or substantially coincides with the orthographic projection of the first connecting post 251 on the driving substrate.

[0377] In some examples, as shown in Figures 31(b) and 31(d), the orthographic projections of the plurality of connecting posts 25, other than the sixth connecting post 256, onto the driving substrate can be located on opposite sides of the orthographic projection of the light-emitting device 24 onto the driving substrate, for example, on opposite sides along the second direction X, or on opposite sides along the third direction Y. Specifically, the orthographic projections of the second connecting structure 25B and the first connecting post 251 (or the third connecting post 253) onto the driving substrate are located on the same side of the orthographic projection of the light-emitting device 24 onto the driving substrate along the first direction X, and the orthographic projection of the first connecting structure 25A onto the driving substrate is located on the other side of the orthographic projection of the light-emitting device 24 onto the driving substrate along the first direction X.

[0378] In other examples, as shown in Figures 31(a) and 31(c), the orthographic projections of multiple connecting posts 25, excluding the sixth connecting post 256, onto the driving substrate can be uniformly distributed around the orthographic projection of the light-emitting device 24 onto the driving substrate. The distance between the center of the orthographic projection of each connecting post 25 onto the driving substrate and the center of the orthographic projection of the light-emitting device 24 onto the driving substrate is equal or approximately equal. Specifically, the orthographic projections of the second connecting structure 25B, the first connecting structure 25A, and the first connecting post 251 (or the third connecting post 253) onto the driving substrate are located around the orthographic projection of the light-emitting device 24 onto the driving substrate.

[0379] For example, in the second connection structure 25B, the first connection structure 25A, and the first connection post 251 (or the third connection post 253), the spacing between the centers of the orthographic projection patterns of adjacent structures on the driving substrate is equal or approximately equal.

[0380] For example, in FIG31(b), the line connecting the center of the orthographic projection pattern of the second connecting structure 25B and the first connecting post 251 on the driving substrate passes through the center of the orthographic projection pattern of the light-emitting device 24 on the driving substrate, and the line coincides with the diagonal DL of the orthographic projection rectangle of the light-emitting device 24 on the driving substrate.

[0381] For example, in FIG31(a), the line connecting the center of the orthographic projection pattern of the second connection structure 25B and the first connection post 251 on the driving substrate passes through the center of the orthographic projection pattern of the light-emitting device 24 on the driving substrate.

[0382] Therefore, the orthographic projections of multiple connecting posts 25 connected to the same light-emitting device on the driving substrate can be distributed at equal intervals around the orthographic projection of the light-emitting device 24 on the driving substrate. This results in a smaller area occupied by the multiple connecting posts 25 and the light-emitting device 24 connected to them on the plane of the driving substrate, allowing for a larger number of light-emitting units to be set within a unit area of ​​the driving substrate, resulting in a higher arrangement density of the light-emitting units 23, which in turn helps to improve the pixel density of the light-emitting substrate 2.

[0383] It is understood that the embodiments of this disclosure do not limit the relative positional relationship of the orthographic projections of the light-emitting device and the connecting post on the driving substrate. The above embodiments are only used as examples to illustrate the relative positional relationship of the orthographic projections of the light-emitting device and the connecting post on the driving substrate in the structural diagram shown in FIG28, and do not constitute a limitation on the relative positional relationship of the orthographic projections of the light-emitting device and the connecting post on the driving substrate in FIG29 and FIG30.

[0384] For example, in the structural diagram of Figure 29, the orthographic projection shape of the light-emitting device on the driving substrate can be a first circle, and the orthographic projection shape of the multiple connecting posts 25 other than the third connecting post 253 on the driving substrate can be four second circles. The four second circles are distributed at equal intervals around the first circle, and the distance from the center of the four second circles to the center of the first circle is equal or approximately equal, and the distance between the centers of two adjacent second circles is equal.

[0385] For example, in the structural diagram of Figure 30, the orthographic projection shape of the light-emitting device on the driving substrate can be a first rectangle, and the orthographic projection shape of the multiple connecting pillars 25 on the driving substrate can be four second rectangles. The four second rectangles are distributed at equal intervals around the first rectangle, and the distance from the center of the four second rectangles to the center of the first rectangle is equal or approximately equal. The centers of the four second rectangles are located on the extension lines of the two diagonals of the first rectangle.

[0386] In some embodiments, as shown in FIG30, the light-emitting device 24 further includes: a first type semiconductor pattern 2403, a light-emitting layer 2404, and a second type semiconductor pattern 2405, which are sequentially stacked between the first electrode 2401 and the second electrode 2402 along the first direction Z. The orthogonal projection of the first type semiconductor pattern 2403 on the driving substrate 21 is within the orthogonal projection range of the second type semiconductor pattern 2405 on the driving substrate 21.

[0387] The light-emitting layer 2404 can be a multiple quantum well (MQW) layer. For example, the material of the first type semiconductor pattern 2403 can be p-GaN (p-type gallium nitride). The material of the second type semiconductor pattern 2405 can be n-GaN (n-type gallium nitride). Again, for example, the material of the second type semiconductor pattern 2405 can be p-GaN (p-type gallium nitride), and the material of the first type semiconductor pattern 2403 can be n-GaN (n-type gallium nitride).

[0388] The GaN material used here can also be InGaN (indium gallium nitride), AlGAInP (aluminum gallium indium phosphide), AlGaN (aluminum gallium nitride), etc. Using the above materials can result in a higher photoelectric conversion efficiency and a narrower spectrum of emitted light in the formed light-emitting device 24, thereby resulting in higher brightness and purity of the light-emitting unit 23 and higher display quality of the light-emitting substrate 2.

[0389] In some examples, as shown in Figure 30, the first type semiconductor pattern 2403 is closer to the light-emitting side of the light-emitting device 24 compared to the second type semiconductor pattern 2405. The surface roughness of the side of the first type semiconductor pattern 2403 away from the light-emitting layer 2404 ranges from 0.1 μm to 0.3 μm.

[0390] For example, the roughness range of the surface of the first type semiconductor pattern 2403 away from the light-emitting layer 2404 is 0.1μm to 0.15μm, 0.15μm to 0.26μm, 0.21μm to 0.3μm, or 0.15μm to 0.3μm.

[0391] For example, the surface roughness of the side of the first type semiconductor pattern 2403 away from the light-emitting layer 2404 is 0.1 μm, 0.15 μm, 0.21 μm, 0.26 μm or 0.3 μm.

[0392] Therefore, the surface roughness of the side of the first type semiconductor pattern 2403 away from the light-emitting layer 2404 can be larger. During the process of light being emitted from the first type semiconductor pattern 2403 to the light-emitting side, the light loss is less, the light emission efficiency is higher, and the light emission efficiency of the light-emitting unit 23 is higher, which is beneficial to reducing the power consumption of the light-emitting substrate 2.

[0393] For example, the electrode in contact with the first type semiconductor pattern 2403 in the first electrode 2401 and the second electrode 2402 of the light-emitting device 24 is a first preset electrode. For instance, in FIG28, the electrode in contact with the first type semiconductor pattern 2403 is the first electrode 2401, which is the first preset electrode; in FIG29, the electrode in contact with the first type semiconductor pattern 2403 is the second electrode 2402, which is the first preset electrode.

[0394] As shown in FIG29, the first preset electrode of at least one of the first light-emitting device 24, the second light-emitting device 242, and the third light-emitting device 243, includes: a first sub-part 24A, a second sub-part 24B, and a third sub-part 24C.

[0395] The first sub-part 24A is in direct contact with the first type semiconductor pattern 2403, the third sub-part 24C is in direct contact with the corresponding connecting post 25, and the second sub-part 24B is located between the first sub-part 24A and the third sub-part 24C and is electrically connected to the first sub-part 24A and the third sub-part 24C.

[0396] This facilitates the connection between the first preset electrode and the corresponding connecting post 25.

[0397] In some examples, as shown in Figure 29, an insulating layer is provided between the first sub-part 24A and the third sub-part 24C, and a through hole is provided in the insulating layer. The second sub-part 24B is provided in the through hole and is electrically connected to the first sub-part 24A and the third sub-part 24C respectively.

[0398] For example, the materials for the insulating layer include aluminum oxide and silicon oxide.

[0399] For example, as shown in FIG29, the third sub-part 24C extends from the side of the first sub-part 24A away from the light-emitting layer 2404, through the sidewall of the light-emitting device 24, to the surrounding area of ​​the light-emitting device 24.

[0400] For example, the third sub-part 24C extends onto the dielectric layer surrounding the light-emitting device 24.

[0401] This facilitates the connection between the third sub-part 24C and the corresponding connecting post 25, allowing the connecting post 25 to penetrate the corresponding dielectric layer and be located beside the corresponding light-emitting device 24. This allows the connecting post 25 to be used to adjust the angle of the light emitted by the corresponding light-emitting device 24, resulting in a narrower angle of light emitted from the light-emitting surface of the light-emitting unit. This makes the light emitted by the light-emitting unit more focused, which is beneficial for improving the display effect of the light-emitting substrate.

[0402] For example, as shown in FIG29, the first preset electrode of the second light-emitting device 242 and the third light-emitting device 243 in the light-emitting device 24 includes a first sub-part, a second sub-part, and a third sub-part.

[0403] In some examples, the electrode in contact with the second type semiconductor pattern 2405 in the first electrode 2401 and the second electrode 2402 of the light-emitting device 24 is a second preset electrode. For example, in FIG28, the electrode in contact with the second type semiconductor pattern 2405 is the second electrode 2402, which is the second preset electrode; in FIG29, the electrode in contact with the second type semiconductor pattern 2405 is the first electrode 2401, which is the second preset electrode.

[0404] As shown in Figure 29, the second preset electrode includes a fourth sub-part 24D and a fifth sub-part 24E that are electrically connected. The fourth sub-part 24D is in direct contact with the second type semiconductor pattern 2405, and the fifth sub-part 24E is in direct contact with the corresponding connecting post 25.

[0405] For example, the fourth sub-part 24D and the fifth sub-part 24E extend in the plane of the side surface of the second type semiconductor pattern 2405 away from the light-emitting layer 2404.

[0406] Therefore, the second preset electrode can be a flat plate-like structure, or a roughly flat plate-like structure, so that the surface of the second preset electrode away from the driving substrate 21 is relatively flat, which facilitates the subsequent fabrication of other structures (such as the optical lens 27 mentioned below) on the second preset electrode, and helps to simplify the fabrication process of the light-emitting substrate 2.

[0407] The aforementioned fifth sub-section 24E extends to the area surrounding the light-emitting device 24. For example, the fifth sub-section 24E extends onto the dielectric layer surrounding the light-emitting device 24.

[0408] This facilitates the connection between the fifth sub-part 24E and the corresponding connecting post 25, allowing the connecting post 25 to penetrate the corresponding dielectric layer and be located beside the corresponding light-emitting device 24. This allows the connecting post 25 to be used to adjust the angle of the light emitted by the corresponding light-emitting device 24, resulting in a narrower angle of light emitted from the light-emitting surface of the light-emitting unit. This makes the light emitted by the light-emitting unit more focused, which is beneficial for improving the display effect of the light-emitting substrate.

[0409] In some examples, as shown in Figure 29, the light emitted by the light-emitting layers 2404 in multiple light-emitting devices 24 of the same light-emitting unit 23 is of the same color. For example, the light-emitting layers 2404 in each light-emitting device 24 are made of the same material, and each light-emitting layer 2404 emits blue light, or emits white light.

[0410] As shown in FIG29, at least one light-emitting device 24 further includes a color conversion layer 2407 disposed on the side of the first electrode 2401 and the second electrode 2402 that is away from the driving substrate 21.

[0411] The orthographic projection of the light-emitting layer 2404 of the light-emitting device 24 onto the driving substrate 21 is located within the orthographic projection range of the color conversion layer 2407 onto the driving substrate 21.

[0412] The color conversion layer 2407 is configured to convert the light emitted by the light-emitting layer 2404 into light of a set color.

[0413] For example, the color of the light emitted by the light-emitting layer 2404 is different from the set color. The set color can be red or green, etc.

[0414] Therefore, it can be ensured that all light emitted from the light-emitting layer 2404 that is directed towards the light-emitting unit 23 can pass through the color conversion layer before exiting, allowing each light-emitting device 24 to emit light of different colors. The light emitted by each light-emitting device 24 in the light-emitting unit 23 combines with each other, enabling the light-emitting unit 23 to emit colored light, thus allowing the light-emitting substrate 2 to achieve multi-color display. This colored light can be red, green, or blue, or it can be yellow, white, or purple, etc.

[0415] In other examples, as shown in Figures 28 and 30, the light emitted by the light-emitting layers 2404 of at least two light-emitting devices 24 in the same light-emitting unit 23 is of different colors.

[0416] For example, the materials of the light-emitting layers 2404 in at least two light-emitting devices 24 are different, and the two light-emitting layers 2404 emit red light and blue light respectively.

[0417] For example, the materials of the light-emitting layers 2404 of the three light-emitting devices 24 are different, and the three light-emitting layers 2404 emit red light, green light and blue light respectively.

[0418] Therefore, at least two light-emitting devices 24 can emit light of different colors. The light emitted by each light-emitting device 24 in the light-emitting unit 23 combines with each other, thereby enabling the light-emitting unit 23 to emit colored light, and enabling the light-emitting substrate 2 to achieve multi-color display. The colored light can be red, green, or blue, or it can be yellow, white, or purple, etc.

[0419] For example, the wavelength of the light emitted by the first light-emitting device 241 is greater than the wavelength of the light emitted by the second light-emitting device 242, and the wavelength of the light emitted by the second light-emitting device 242 is greater than the wavelength of the light emitted by the third light-emitting device 243.

[0420] Since the first light-emitting device 241 is far from the light-emitting side of the light-emitting unit 23, the light emitted by the first light-emitting device 241 needs to pass through the second light-emitting device 242 and the third light-emitting device 243 before being emitted. The light emitted by the second light-emitting device 242 needs to pass through the third light-emitting device 243 before being emitted. This arrangement can make the amount of light emitted by the first light-emitting device 241 absorbed by the second light-emitting device 242 (for example, the light emitted by the first light-emitting device 241 is absorbed by the light-emitting layer 2404 and / or the color conversion layer 2407 in the second light-emitting device 242) less, and the amount of light emitted by the first light-emitting device 241 absorbed by the third light-emitting device 243 (for example, the light-emitting layer 2404 and / or the color conversion layer 2407 in the third light-emitting device 243) less, so that the light output and light output efficiency of the first light-emitting device 241 are higher. The amount of light emitted by the second light-emitting device 242 that is absorbed by the third light-emitting device 243 (e.g., the light-emitting layer 2404 and / or color conversion layer 2407 in the third light-emitting device 243) is less, which makes the light output and light output efficiency of the second light-emitting device 242 higher, thereby making the light output and light output efficiency of the light-emitting unit 23 higher, which is beneficial to reducing the power consumption of the light-emitting substrate 2.

[0421] For example, the first light-emitting device 241 can emit red light, the second light-emitting device 242 can emit green light, and the third light-emitting device 243 can emit blue light.

[0422] In some embodiments, as shown in Figures 28-30, the light-emitting device 24 further includes a dimming layer 2406 disposed on the side of the first electrode 2401 and the second electrode 2402 that is relatively close to the driving substrate 21. The orthographic projection of the light-emitting layer 2404 of the light-emitting device 24 onto the driving substrate 21 lies within the orthographic projection range of the dimming layer 2406 onto the driving substrate 21. Therefore, all light emitted from the light-emitting layer 2404 that is directed toward the driving substrate 21 must pass through the dimming layer 2406.

[0423] For example, as shown in FIG29, when the light-emitting device 24 includes a first preset electrode, the dimming layer 2406 may be located on the side of the first sub-part close to the driving substrate 21, between the first sub-part 24A and the third sub-part 24C.

[0424] For example, if the light-emitting device 24 includes a first preset electrode, the dimming layer 2406 may be located on the side of the third sub-part closer to the driving substrate 21.

[0425] The dimming layer 2406 is configured to reflect light incident from the side of the dimming layer 2406 away from the driving substrate 21, through light incident on the dimming layer 2406 near the driving substrate 21.

[0426] Therefore, by using the dimming layer 2406 to reduce the loss of light emitted from the light-emitting device 24, the light output and light output efficiency of the light-emitting unit 23 are increased, which helps to reduce the power consumption of the light-emitting substrate 2.

[0427] In some examples, as shown in Figures 28 to 30, the dimming layer 2406 in the first light-emitting device 241 is a first dimming layer 2406A, which is configured to reflect the light emitted by the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243.

[0428] Therefore, among the light emitted by the first light-emitting device 241, the second light-emitting device 242 and the third light-emitting device 243 in the light-emitting unit 23, the light incident on the first dimming layer 2406A can be reflected by the first dimming layer 2406A to the light-emitting side of the light-emitting unit 23, which can reduce the loss of light emitted by the light-emitting device 24, improve the light output and light output efficiency of the light-emitting unit 23, and help reduce the power consumption of the light-emitting substrate 2.

[0429] The dimming layer 2406 in the second light-emitting device 242 is a second dimming layer 2406B. The second dimming layer 2406B is configured to reflect the light emitted by the second light-emitting device 242 and the third light-emitting device 243, and transmit the light emitted by the first light-emitting device 241. Therefore, among the light emitted by the second light-emitting device 242 and the third light-emitting device 243 in the light-emitting unit 23, the light incident on the first dimming layer 2406A can be reflected by the first dimming layer 2406A to the light-emitting side of the light-emitting unit 23; among the light emitted by the first light-emitting device 241, the light incident on the second dimming layer 2406B can be transmitted through the second dimming layer 2406B and emitted to the light-emitting side of the light-emitting unit 23. This reduces the light loss emitted by the light-emitting device 24, increases the light output and light output efficiency of the light-emitting unit 23, and helps to reduce the power consumption of the light-emitting substrate 2.

[0430] The dimming layer 2406 in the third light-emitting device 243 is a third dimming layer 2406C. The third dimming layer 2406C is configured to reflect the light emitted by the third light-emitting device 243 and transmit the light emitted by the first light-emitting device 241 and the second light-emitting device 242. Therefore, among the light emitted by the third light-emitting device 243 in the light-emitting unit 23, the light incident on the first dimming layer 2406A can be reflected by the third dimming layer 2406C to the light-emitting side of the light-emitting unit 23; among the light emitted by the first light-emitting device 241 and the second light-emitting device 242, the light incident on the third dimming layer 2406C can pass through the third dimming layer 2406C and exit to the light-emitting side of the light-emitting unit 23. This reduces the light loss emitted by the light-emitting device 24, increases the light output and light output efficiency of the light-emitting unit 23, and helps to reduce the power consumption of the light-emitting substrate 2.

[0431] In some embodiments, as shown in Figures 28 to 30, the light-emitting substrate 2 further includes an optical lens 27 located on the side of the light-emitting unit 23 away from the driving substrate 21.

[0432] The orthographic projection of the light-emitting layer 2404 of the light-emitting device 24 onto the driving substrate 21 lies within the orthographic projection range of the optical lens 27 onto the driving substrate 21. As a result, more of the light rays emitted from the light-emitting layer 2404 and directed toward the light-emitting side are emitted after passing through the optical lens 27.

[0433] The optical lens 27 can transmit light and can adjust the light emission angle, which is beneficial to improving the light emission efficiency of the light-emitting device 24.

[0434] For example, the material of optical lens 27 can be silicon oxide.

[0435] The cross-sectional shape of the optical lens 27 can be semi-circular or arched, comprising a first arc and a first straight line connected together, wherein the radius of curvature of the first arc ranges from 15μm to 20μm. The maximum distance between a point on the first arc and the first straight line ranges from 6μm to 8μm. This allows the optical lens 27 to better adjust the light emission angle, which is beneficial for improving the light emission efficiency of the light-emitting device 24.

[0436] For example, as shown in FIG30, the light-emitting substrate 2 further includes a protective layer 28. The protective layer 28 includes a plurality of openings, one of which, in its orthographic projection onto the driving substrate, lies within the orthographic projection range of an optical lens 27 onto the driving substrate.

[0437] For example, the material of the protective layer 28 includes an adhesive, which may optionally be a photoresist or a resin.

[0438] The thickness of the protective layer 28 ranges from 6 μm to 8 μm. For example, the thickness of the protective layer 28 can be 6 μm, 7 μm, or 8 μm.

[0439] The protective layer 28 can absorb the light incident on it, thereby absorbing stray light, reducing light crosstalk between light emitted by adjacent light-emitting units, and improving the display contrast of the light-emitting substrate 2.

[0440] Some embodiments of this disclosure also provide a method for preparing a light-emitting substrate 2, used to prepare the light-emitting substrate 2 described in any of the above embodiments.

[0441] First, the first light-emitting device is fabricated.

[0442] Specifically, as shown in Figure 32, an epitaxial structure is formed on a substrate 01. This epitaxial structure includes a buffer layer 02, a second type semiconductor layer 2405L, a light-emitting thin film 2404L, and a first type semiconductor layer 2303L stacked sequentially. A second electrode layer 2402L is formed on the epitaxial structure.

[0443] For example, the epitaxial structure may also include a buffer layer 02, a first type semiconductor layer 2403L, a light-emitting thin film 2404L, and a second type semiconductor layer 2305L stacked sequentially. A first electrode layer may also be formed first in the epitaxial structure. The substrate material can be sapphire, SiC, GaN, etc. The buffer layer 02 includes a first sub-buffer layer and a second sub-buffer layer stacked together, wherein the first sub-buffer layer is located between the second sub-buffer layer and the substrate 01. The material of the first sub-buffer layer can be AlGaN, etc., and the material of the second sub-buffer layer can be GaN, etc. The material of the second electrode layer 2402L can be a conductive material, optionally indium tin oxide (ITO).

[0444] For example, as shown in FIG33, a hard mask layer 031 is formed on the second electrode layer 2402L, and the thickness of the hard mask layer 031 is about 40nm.

[0445] For example, as shown in FIG34, the substrate 01 is thinned so that the thickness of the substrate 01 is about 750μm.

[0446] For example, as shown in FIG35, a photoresist layer is formed on the hard mask layer 031, and the photoresist layer is patterned to form a first photoresist pattern 032.

[0447] For example, as shown in Figures 35 and 36, using the first photoresist pattern 032 as a mask, the second electrode layer 2402L, the first type semiconductor layer 2403L, the light-emitting thin film 2404L, and the second type semiconductor layer 2405L are patterned to obtain the first sub-part 24A of the second electrode 2402, the first type semiconductor pattern 2403, the light-emitting layer 2404, and the second type semiconductor pattern 2405. For example, inductively coupled plasma etching (ICP) is used to pattern the second electrode layer 2402L, the first type semiconductor layer 2403L, the light-emitting thin film 2404L, and the second type semiconductor layer 2405L.

[0448] For example, as shown in Figures 35 to 37, the first photoresist pattern 032 and hard mask layer 031 located on the first sub-part 24A are removed.

[0449] For example, as shown in FIG38, a first insulating layer 041 and a reflective layer 2408L are formed on the sidewall and top wall of the whole consisting of the first sub-part 24A of the second electrode 2402, the first type semiconductor pattern 2403, the light-emitting layer 2404 and the second type semiconductor pattern 2405, and on the buffer layer 02 between two adjacent second type semiconductor patterns 2405.

[0450] For example, the reflective layer 2408L can be formed using a deposition or electroplating process. The material of the reflective layer 2408L can be metallic silver. The thickness of the reflective layer 2408L is approximately 40 nm. The material of the first insulating layer 041 can be silicon oxide.

[0451] For example, as shown in Figures 39 and 40, a second photoresist pattern 033 is formed on the reflective layer 2408L. Using the second photoresist pattern 033 as a mask, the portion of the reflective layer 2408L located on the top wall of the entire structure composed of the first sub-part 24A, the first type semiconductor pattern 2403, the light-emitting layer 2404, and the second type semiconductor pattern 2405, and on the buffer layer 02 between two adjacent second type semiconductor patterns 2405, is removed. The portion of the reflective layer 2408L located on the side wall of the entire structure composed of the first sub-part 24A, the first type semiconductor pattern 2403, the light-emitting layer 2404, and the second type semiconductor pattern 2405 is retained, forming a reflective pattern 2408. Thus, the reflective pattern 2408 can be used to reflect the light emitted by the light-emitting device, which is beneficial to improving the light extraction efficiency of the light-emitting device. For example, an etching process can be used to remove the corresponding portion of the reflective layer 2408L.

[0452] As exemplarily shown in Figure 41, a passivation layer 042 is formed. The passivation layer 042 covers the reflective pattern 2408 and the first insulating layer 041. For example, the passivation layer 042 can be formed using a chemical vapor deposition (CVD) process. The thickness of the passivation layer 042 is approximately 200 nm.

[0453] For example, as shown in FIG42, a third photoresist pattern 034 is formed on the passivation layer 042. Using the third photoresist pattern 034 as a mask, the passivation layer 042 and the first insulating layer 041 are etched to form a first via 051. The first via 051 exposes a portion of the first sub-part 24A.

[0454] For example, as shown in Figures 43 and 44, the third photoresist pattern 034 is removed, a second sub-part 24B of the second electrode is formed within the first via 051, and a third sub-part 24C is formed on the passivation layer 042. The first sub-part 24A, the second sub-part 24B, and the third sub-part 24C are sequentially connected to form the second electrode 2402. There is a gap between the second electrodes 2402 of adjacent light-emitting devices.

[0455] For example, as shown in Figure 45, a dimming film is formed, and the dimming film is etched to form a dimming layer 2406. This completes the fabrication of the first light-emitting device. For example, a deposition process can be used to form the dimming film, and a dry etching process can be used to etch the dimming film. The thickness of the dimming layer is approximately 4 μm.

[0456] The bonding method between the first light-emitting device and the driving substrate is described below.

[0457] For example, as shown in FIG46, a first dielectric layer 261 is formed, which is located between two adjacent first light-emitting devices, and the first dielectric layer 261 also covers the dimming layer 2406. For example, the thickness of the first dielectric layer can be... about.

[0458] As exemplarily shown in FIG47, a plurality of second vias 052 are formed in the first dielectric layer 261. Of the plurality of second vias 052, some expose a portion of the second electrode, and some expose a portion of the passivation layer 042. For example, the diameter of the second vias 052 is approximately 2 μm.

[0459] As exemplarily shown in Figures 48 and 49, a connecting post 25 is formed within the second via 052. For example, an auxiliary layer film 2501 and a main body film 2502 are sequentially formed within the second via 052. The main body film 2502 is chemically mechanically ground and polished to remove the portion of the main body film 2502 located on the first dielectric layer, thus forming the main body. For example, the auxiliary layer film 2501 can be formed using a sputtering process, and the material of the auxiliary layer film may include thallium and thallium nitride. The main body film 2502 is formed using an electroplating process, and the material of the main body film may be copper.

[0460] As exemplarily shown in FIG. 50, a driving substrate 21 is provided, on which a dielectric layer 26 is formed, and a first auxiliary connection portion 2505 is formed penetrating the dielectric layer 26. For example, the structure of the first auxiliary connection portion 2505 is the same as that of the connecting post 25, and the material is the same. The first auxiliary connection portion 2505 is connected to the driving circuit in the driving substrate 21. It is understood that the first light-emitting device in FIG. 50 can have various structures and can be fabricated according to actual needs.

[0461] For example, as shown in FIG51, the driving substrate 21 is bonded to the first light-emitting device 241. For example, the first light-emitting device 241 is flipped upside down and then bonded to the driving substrate 21. The driving substrate 21 and the first light-emitting device 241 are bonded together by hybrid bonding. The first auxiliary connection portion 2505 is connected to the connection post 25, and the dielectric layer 26 is bonded to the first dielectric layer 261.

[0462] For example, as shown in FIG52, the substrate 01 and buffer layer 02 in the first light-emitting device are removed. For example, a stripping process can be used to remove the substrate 01 and buffer layer 02 in the first light-emitting device.

[0463] As exemplarily shown in FIG53, a third via 053 is formed, which exposes the surface of at least one connecting post 25.

[0464] For example, as shown in FIG54, a first electrode 2401 is formed on a second type semiconductor pattern 2405. The first electrode 2401 can be formed, for example, using sputtering and etching processes. The material of the first electrode 2401 can be the same as the material of the second electrode layer 2402, and the thickness of the first electrode 2401 is... about.

[0465] For example, a color conversion layer is formed on the first electrode 2401. This can be achieved, for instance, by coating to form a color conversion thin film followed by etching to form the color conversion layer. The thickness of the color conversion layer can be approximately 2 μm (not shown in the figure).

[0466] For example, as shown in FIG55, an encapsulation layer 043 is formed on the first electrode 2401 or the color conversion layer. For example, the encapsulation layer 043 is used to encapsulate and protect the light-emitting device. The encapsulation layer 043 can be formed using a CVD process. The material of the encapsulation layer 043 can be silicon oxide, and its thickness can be [missing information]. about.

[0467] For example, as shown in FIG56, a fourth via 054 is formed that penetrates at least through the first encapsulation layer 043. For example, a portion of the fourth via 054 penetrates the first encapsulation layer 043, exposing a portion of the first electrode 2401, and a portion of the fourth via 054 penetrates the first encapsulation layer 043 and the passivation layer 042, exposing a portion of the connecting post 25.

[0468] As exemplarily shown in FIG57, a second auxiliary connection portion 2506 is formed within the fourth through hole 054. A portion of the second auxiliary connection portion 2506 is connected to the first electrode 2401, and another portion of the second auxiliary connection portion 2506 is connected to the connecting post 25.

[0469] As exemplarily shown in Figures 57 and 58, the second light-emitting device 242 is bonded to the first light-emitting device 241. For example, the end of the second auxiliary connection portion 2506 away from the first light-emitting device is connected to the connecting post 25 on the side of the second light-emitting device. The first encapsulation layer 043 is bonded to the second dielectric layer 262.

[0470] For example, as shown in FIG59, the substrate 01 and buffer layer 02 in the second light-emitting device are removed. As shown in FIG60, a first electrode 2401, a second encapsulation layer 044, and a third auxiliary connection portion 2507 are sequentially formed on the second type semiconductor pattern 2405 in the second light-emitting device.

[0471] For example, as shown in FIG61, the third light-emitting device 243 is bonded to the second light-emitting device 242. For example, the end of the third auxiliary connection portion 2507 away from the second light-emitting device is connected to the connecting post 25 on the side of the third light-emitting device. The second encapsulation layer 044 is bonded to the third dielectric layer 263.

[0472] For example, as shown in FIG61, the substrate and buffer layer in the third light-emitting device are removed. As shown in FIG62, a first electrode 2401 is formed on the second type semiconductor pattern 2405 in the third light-emitting device.

[0473] As exemplarily shown in Figures 62 and 63, a protective layer 28 and an optical lens 27 are formed on the third light-emitting device.

[0474] For example, a protective layer 28 can be formed using a coating process and a wet etching process. An optical lens 27 can be formed using a photoresist thermal reflow process and a dry etching process.

[0475] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A driving circuit for driving a light-emitting unit, the light-emitting unit comprising a first light-emitting device, a second light-emitting device, and a third light-emitting device; The second electrode of the first light-emitting device is connected to the first electrode of the second light-emitting device at a first node, and the second electrode of the second light-emitting device is connected to the first electrode of the third light-emitting device at a second node; The driving circuit includes: The first sub-circuit is connected to the scanning signal terminal, the first electrode of the first light-emitting device, the first voltage terminal, and the first node, and the first node is connected to the second voltage terminal; the first sub-circuit is configured to receive a first data signal under the control of the scanning signal terminal; The second sub-circuit is connected to the scanning signal terminal, the first node, and the second node, and the second node is connected to the third voltage terminal; the second sub-circuit is configured to receive a second data signal under the control of the scanning signal terminal; The third sub-circuit is connected to the scanning signal terminal, the second node, and the second electrode of the third light-emitting device. The second electrode of the third light-emitting device is connected to the fourth voltage terminal. The third sub-circuit is configured to receive a third data signal under the control of the scanning signal terminal.

2. The driving circuit according to claim 1, wherein, The first sub-circuit includes a first input unit and a switching unit; The first input unit is connected to the scan signal terminal, the first data signal terminal and the switch unit, and is configured to transmit the first data signal from the first data signal terminal to the switch unit in response to the scan signal from the scan signal terminal; The switching unit is also connected to the first electrode, the first voltage terminal, and the first node of the first light-emitting device, and is configured to control the magnitude of the current flowing through the first light-emitting device according to the first data signal.

3. The driving circuit according to claim 2, wherein, The first input unit includes a first transistor, and the switching unit includes a second transistor and a first capacitor; The control electrode of the first transistor is connected to the scan signal terminal, the first electrode of the first transistor is connected to the first data signal terminal, and the second electrode of the first transistor is connected to the control electrode of the second transistor. The first terminal of the second transistor is connected to the first voltage terminal, and the second terminal of the second transistor is connected to the first electrode of the first light-emitting device; The first terminal of the first capacitor is connected to the second terminal and the control terminal of the first transistor, and the second terminal of the first capacitor is connected to the first node.

4. The driving circuit according to any one of claims 1 to 3, wherein, The second sub-circuit includes a second input unit and a first shunt unit; The second input unit is connected to the scan signal terminal, the second data signal terminal and the first splitting unit, and is configured to transmit the second data signal from the second data signal terminal to the first splitting unit in response to the scan signal from the scan signal terminal; The first shunt unit is also connected between the first node and the second node and is configured to shunt the current flowing into the second light-emitting device according to the second data signal, so as to control the magnitude of the current flowing through the second light-emitting device.

5. The driving circuit according to claim 4, wherein, The second input unit includes a third transistor, and the first shunt unit includes a fourth transistor and a second capacitor; The control electrode of the third transistor is connected to the scan signal terminal, the first electrode of the third transistor is connected to the second data signal terminal, and the second electrode of the third transistor is connected to the control electrode of the fourth transistor. The first terminal of the fourth transistor is connected to the first node, and the second terminal of the fourth transistor is connected to the second node; The first terminal of the second capacitor is connected to the second electrode of the third transistor and the control electrode of the fourth transistor, and the second terminal of the second capacitor is connected to the second node.

6. The driving circuit according to any one of claims 1 to 5, wherein, The third sub-circuit includes a third input unit and a second shunt unit; The third input unit is connected to the scan signal terminal, the third data signal terminal and the second splitting unit, and is configured to transmit the third data signal from the third data signal terminal to the second splitting unit in response to the scan signal from the scan signal terminal. The second shunt unit is also connected between the second node and the second electrode of the third light-emitting device, and is configured to shunt the current flowing into the third light-emitting device according to the third data signal, so as to control the magnitude of the current flowing through the third light-emitting device.

7. The driving circuit according to claim 6, wherein, The third input unit includes a fifth transistor, and the second shunt unit includes a sixth transistor and a third capacitor; The control electrode of the fifth transistor is connected to the scan signal terminal, the first electrode of the fifth transistor is connected to the third data signal terminal, and the second electrode of the fifth transistor is connected to the control electrode of the sixth transistor. The first electrode of the sixth transistor is connected to the second node, and the second electrode of the sixth transistor is connected to the second electrode of the third light-emitting device; The first terminal of the third capacitor is connected to the second electrode of the fifth transistor and the control electrode of the sixth transistor, and the second terminal of the third capacitor is connected to the second electrode of the third light-emitting device.

8. The driving circuit according to any one of claims 1 to 7, wherein, The voltage difference between the first voltage signal provided by the first voltage terminal and the second voltage signal provided by the second voltage terminal is greater than or equal to the threshold voltage of the first light-emitting device. The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal is greater than or equal to the threshold voltage of the second light-emitting device; The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal is greater than or equal to the threshold voltage of the third light-emitting device.

9. A driving circuit for driving a light-emitting unit, the light-emitting unit comprising a first light-emitting device, a second light-emitting device, and a third light-emitting device; The second electrode of the first light-emitting device is connected to the first electrode of the second light-emitting device at a first node, and the second electrode of the second light-emitting device is connected to the first electrode of the third light-emitting device at a second node; The driving circuit includes: A first sub-circuit is connected to the first electrode and the first voltage terminal of the first light-emitting device; the first sub-circuit is configured to receive a first data signal and control the voltage of the first electrode of the first light-emitting device. The second sub-circuit is connected to the first node and the second voltage terminal; the second sub-circuit is configured to receive a second data signal and control the voltage of the first node; The third sub-circuit is connected to the second node, the second voltage terminal, and the third voltage terminal; the third sub-circuit is configured to receive the third data signal and control the voltage of the second node. The fourth sub-circuit is connected to the second electrode of the third light-emitting device, the third voltage terminal, and the fourth voltage terminal; the fourth sub-circuit is configured to receive a fourth data signal and control the voltage of the second electrode of the third light-emitting device.

10. The driving circuit according to claim 9, wherein, The first sub-circuit includes a first input unit and a first driving unit; The first input unit is connected to the scan signal terminal, the first data signal terminal and the first driving unit, and is configured to transmit the first data signal from the first data signal terminal to the first driving unit in response to the scan signal from the scan signal terminal. The first driving unit is also connected to the first electrode, the first voltage terminal and the reference voltage terminal of the first light-emitting device, and is configured to transmit the first voltage signal provided by the first voltage terminal to the first electrode of the first light-emitting device according to the first data signal.

11. The driving circuit according to claim 10, wherein, The first input unit includes a first transistor, and the first driving unit includes a second transistor and a first capacitor; The control electrode of the first transistor is connected to the scan signal terminal, the first electrode of the first transistor is connected to the first data signal terminal, and the second electrode of the first transistor is connected to the control electrode of the second transistor. The first terminal of the second transistor is connected to the first voltage terminal, and the second terminal of the second transistor is connected to the first electrode of the first light-emitting device; The first terminal of the first capacitor is connected to the second terminal and the control terminal of the first transistor, and the second terminal of the first capacitor is connected to the reference voltage terminal.

12. The driving circuit according to any one of claims 9 to 11, wherein, The second sub-circuit includes a second input unit and a second driving unit; The second input unit is connected to the scan signal terminal, the second data signal terminal and the second drive unit, and is configured to transmit the second data signal from the second data signal terminal to the second drive unit in response to the scan signal from the scan signal terminal; The second driving unit is also connected to the first node, the second voltage terminal and the reference voltage terminal, and is configured to transmit the second voltage signal provided by the second voltage terminal to the first node according to the second data signal.

13. The driving circuit according to claim 12, wherein, The second input unit includes a third transistor, and the second driving unit includes a fourth transistor and a second capacitor; The control electrode of the third transistor is connected to the scan signal terminal, the first electrode of the third transistor is connected to the second data signal terminal, and the second electrode of the third transistor is connected to the control electrode of the fourth transistor. The first terminal of the fourth transistor is connected to the second voltage terminal, and the second terminal of the fourth transistor is connected to the first node; The first terminal of the second capacitor is connected to the second electrode of the third transistor and the control electrode of the fourth transistor, and the second terminal of the second capacitor is connected to the reference voltage terminal.

14. The driving circuit according to any one of claims 9 to 13, wherein, The third sub-circuit includes a third input unit and a third driving unit; The third input unit is connected to the scan signal terminal, the third data signal terminal and the third drive unit, and is configured to transmit the third data signal from the third data signal terminal to the third drive unit in response to the scan signal from the scan signal terminal. The third driving unit is also connected to the second node, the second voltage terminal, the third voltage terminal, and the reference voltage terminal, and is configured to transmit the second voltage signal provided by the second voltage terminal or the third voltage signal provided by the third voltage terminal to the second node according to the third data signal.

15. The driving circuit according to claim 14, wherein, The third input unit includes a fifth transistor, and the third driving unit includes a sixth transistor, a seventh transistor, and a third capacitor; the sixth transistor and the seventh transistor have opposite switching types. The control electrode of the fifth transistor is connected to the scan signal terminal, the first electrode of the fifth transistor is connected to the third data signal terminal, and the second electrode of the fifth transistor is connected to the control electrode of the sixth transistor and the control electrode of the seventh transistor. The first terminal of the sixth transistor is connected to the second voltage terminal, and the second terminal of the sixth transistor is connected to the second node; The first terminal of the seventh transistor is connected to the third voltage terminal, and the second terminal of the seventh transistor is connected to the second node; The first terminal of the third capacitor is connected to the second terminal of the fifth transistor, the control terminal of the sixth transistor, and the control terminal of the seventh transistor, and the second terminal of the third capacitor is connected to the reference voltage terminal.

16. The driving circuit according to any one of claims 9 to 15, wherein, The fourth sub-circuit includes a fourth input unit and a fourth driving unit; The fourth input unit is connected to the scan signal terminal, the fourth data signal terminal and the fourth drive unit, and is configured to transmit the fourth data signal from the fourth data signal terminal to the fourth drive unit in response to the scan signal from the scan signal terminal. The fourth driving unit is also connected to the second electrode of the third light-emitting device, the third voltage terminal, the fourth voltage terminal and the reference voltage terminal, and is configured to transmit the third voltage signal provided by the third voltage terminal or the fourth voltage signal provided by the fourth voltage terminal to the second electrode of the third light-emitting device according to the fourth data signal.

17. The driving circuit according to claim 16, wherein, The fourth input unit includes an eighth transistor, and the fourth driving unit includes a ninth transistor, a tenth transistor, and a fourth capacitor; the ninth transistor and the tenth transistor have opposite switching types. The control electrode of the eighth transistor is connected to the scan signal terminal, the first electrode of the eighth transistor is connected to the fourth data signal terminal, and the second electrode of the eighth transistor is connected to the control electrode of the ninth transistor and the control electrode of the tenth transistor. The first electrode of the ninth transistor is connected to the third voltage terminal, and the second electrode of the ninth transistor is connected to the second electrode of the third light-emitting device; The first electrode of the tenth transistor is connected to the fourth voltage terminal, and the second electrode of the tenth transistor is connected to the second electrode of the third light-emitting device; The first terminal of the fourth capacitor is connected to the second terminal of the eighth transistor, the control terminal of the ninth transistor, and the control terminal of the tenth transistor, and the second terminal of the fourth capacitor is connected to the reference voltage terminal.

18. The driving circuit according to any one of claims 10 to 17, wherein, The first sub-circuit also includes: a first control unit; The first driving unit is connected to the first voltage terminal through the first control unit, and the first control unit is also connected to the enable signal terminal; the first control unit is configured to transmit the first voltage signal to the first driving unit under the control of the enable signal from the enable signal terminal, so as to at least control the light emission duration of the first light-emitting device.

19. The driving circuit according to any one of claims 14 to 17, wherein, The third sub-circuit also includes: a second control unit; The third driving unit is connected to the second node through the second control unit, and the second control unit is also connected to the enable signal terminal; the second control unit is configured to transmit the second voltage signal or the third voltage signal to the first electrode of the third light-emitting device under the control of the enable signal from the enable signal terminal, so as to control the light emission duration of the second light-emitting device and / or the third light-emitting device.

20. The driving circuit according to any one of claims 9 to 19, wherein, The voltage difference between the first voltage signal provided by the first voltage terminal and the second voltage signal provided by the second voltage terminal is greater than or equal to the threshold voltage of the first light-emitting device. The voltage difference between the second voltage signal and the third voltage signal provided by the third voltage terminal is greater than or equal to the threshold voltage of the second light-emitting device; The voltage difference between the third voltage signal and the fourth voltage signal provided by the fourth voltage terminal is greater than or equal to the threshold voltage of the third light-emitting device.

21. A light-emitting substrate, comprising: A driving substrate, comprising a plurality of driving circuits as described in any one of claims 1 to 20; Multiple light-emitting units are disposed on the driving substrate, and the driving circuit is used to drive one light-emitting unit; the light-emitting unit includes multiple light-emitting devices, and the multiple light-emitting devices include a first light-emitting device, a second light-emitting device and a third light-emitting device stacked sequentially along a first direction, the first direction being the thickness direction of the driving substrate; Multiple connecting posts extend along the first direction; the multiple connecting posts include a first connecting post and a second connecting post, the second electrode of the first light-emitting device and the first electrode of the second light-emitting device are electrically connected through the first connecting post, and the second electrode of the second light-emitting device and the first electrode of the third light-emitting device are electrically connected through the second connecting post.

22. The light-emitting substrate according to claim 21, wherein, The light-emitting substrate further includes: a second dielectric layer and a third dielectric layer, wherein the second dielectric layer surrounds the second light-emitting device and the third dielectric layer surrounds the third light-emitting device; The first connecting post is located beside the second light-emitting device and penetrates the second dielectric layer; The second connecting post is located beside the third light-emitting device and penetrates the third dielectric layer.

23. The light-emitting substrate according to claim 21 or 22, wherein, The plurality of connecting posts further includes a third connecting post, which is used to electrically connect the second electrode of the first light-emitting device and the driving substrate.

24. The light-emitting substrate according to claim 23, wherein, The orthographic projection of the third connecting post on the driving substrate is located within the orthographic projection range of the first light-emitting device on the driving substrate; or, The light-emitting substrate further includes: a first dielectric layer surrounding the first light-emitting device, the third connecting post being located beside the first light-emitting device and penetrating the first dielectric layer; along the first direction, the third connecting post is connected to the first connecting post, and the orthographic projection of the third connecting post on the driving substrate at least partially overlaps with the orthographic projection of the first connecting post on the driving substrate.

25. The light-emitting substrate according to any one of claims 21 to 24, wherein, The plurality of connecting posts further include: a first connecting structure, the first connecting structure being used to electrically connect the second electrode of the second light-emitting device and the driving substrate.

26. The light-emitting substrate according to claim 25, wherein, The first connection structure includes a fourth connection post and a fifth connection post, wherein the fourth connection post penetrates through a first dielectric layer surrounding the first light-emitting device, and the fifth connection post penetrates through a second dielectric layer surrounding the second light-emitting device; Along the first direction, the fourth connecting post is connected to the fifth connecting post, and the orthographic projection of the fourth connecting post on the driving substrate and the orthographic projection of the fifth connecting post on the driving substrate at least partially overlap.

27. The light-emitting substrate according to claim 26, wherein, Along the first direction, the second connecting post is connected to the fifth connecting post, and the orthographic projection of the second connecting post on the driving substrate and the orthographic projection of the fifth connecting post on the driving substrate at least partially overlap.

28. The light-emitting substrate according to any one of claims 21 to 27, wherein, The plurality of connecting posts further includes a sixth connecting post, which is used to electrically connect the first electrode of the first light-emitting device and the driving substrate.

29. The light-emitting substrate according to claim 28, wherein, The orthographic projection of the sixth connecting post onto the driving substrate lies within the orthographic projection range of the first light-emitting device onto the driving substrate; or... The sixth connecting post is located beside the first light-emitting device and penetrates the first dielectric layer surrounding the first light-emitting device.

30. The light-emitting substrate according to any one of claims 21 to 29, wherein, The plurality of connecting posts further include a second connecting structure, which is used to electrically connect the second electrode of the third light-emitting device and the driving substrate.

31. The light-emitting substrate according to claim 30, wherein, The second connection structure includes a seventh connection post, an eighth connection post, and a ninth connection post. The seventh connection post penetrates through a first dielectric layer surrounding the first light-emitting device, the eighth connection post penetrates through a second dielectric layer surrounding the second light-emitting device, and the ninth connection post penetrates through a third dielectric layer surrounding the third light-emitting device. Along the first direction, the seventh connecting post is connected to the eighth connecting post, and the orthographic projection of the seventh connecting post on the driving substrate and the orthographic projection of the eighth connecting post on the driving substrate at least partially overlap; along the first direction, the eighth connecting post is connected to the ninth connecting post, and the orthographic projection of the eighth connecting post on the driving substrate and the orthographic projection of the ninth connecting post on the driving substrate at least partially overlap.

32. The light-emitting substrate according to any one of claims 21 to 31, wherein, One of the first electrode and the second electrode of the light-emitting device is the negative electrode, and the other is the positive electrode.

33. The light-emitting substrate according to claim 32, wherein, In the same light-emitting device, the positive electrode of the first electrode and the second electrode are disposed closer to the driving substrate.

34. The light-emitting substrate according to any one of claims 21 to 33, wherein, The light-emitting device further includes: a first type semiconductor pattern, a light-emitting layer, and a second type semiconductor pattern, which are sequentially stacked between the first electrode and the second electrode along the first direction; the orthographic projection of the first type semiconductor pattern on the driving substrate is within the orthographic projection range of the second type semiconductor pattern on the driving substrate. The electrode in contact with the first type of semiconductor pattern in the first electrode and the second electrode of the light-emitting device is a first preset electrode; the first preset electrode of at least one of the first light-emitting device, the second light-emitting device and the third light-emitting device includes: a first sub-part, a second sub-part and a third sub-part; The first sub-part is in direct contact with the first type of semiconductor pattern, the third sub-part is in direct contact with the corresponding connecting post, and the second sub-part is located between the first sub-part and the third sub-part, and is electrically connected to the first sub-part and the third sub-part.

35. The light-emitting substrate according to claim 34, wherein, An insulating layer is provided between the first sub-part and the third sub-part, and a through hole is provided in the insulating layer. The second sub-part is disposed in the through hole and is electrically connected to the first sub-part and the third sub-part respectively.

36. The light-emitting substrate according to claim 34 or 35, wherein, The third sub-part extends from the side of the first sub-part away from the light-emitting layer, through the sidewall of the light-emitting device, to the surrounding area of ​​the light-emitting device.

37. The light-emitting substrate according to any one of claims 34 to 36, wherein, The first preset electrode of the second light-emitting device and the third light-emitting device includes a first sub-part, a second sub-part, and a third sub-part.

38. The light-emitting substrate according to any one of claims 34 to 37, wherein, The electrode in contact with the second type of semiconductor pattern in the first and second electrodes of the light-emitting device is the second preset electrode; The second preset electrode includes: a fourth sub-part and a fifth sub-part that are electrically connected; The fourth sub-part is in direct contact with the second type of semiconductor pattern, and the fifth sub-part is in direct contact with the corresponding connecting post.

39. The light-emitting substrate according to claim 38, wherein, The fourth sub-part and the fifth sub-part extend in the plane of the surface of the second type of semiconductor pattern away from the light-emitting layer; The fifth sub-part extends into the area surrounding the light-emitting device.

40. The light-emitting substrate according to any one of claims 21 to 39, wherein, The light-emitting device further includes: a dimming layer disposed on one of the first electrode and the second electrode that is relatively close to the driving substrate, on the side closer to the driving substrate; The orthographic projection of the light-emitting layer of the light-emitting device onto the driving substrate is located within the orthographic projection range of the dimming layer onto the driving substrate; The dimming layer is configured to transmit light incident on the dimming layer from the side of the dimming layer near the driving substrate and reflect light incident on the dimming layer from the side of the dimming layer away from the driving substrate.

41. The light-emitting substrate according to claim 40, wherein, The dimming layer in the first light-emitting device is a first dimming layer, which is configured to reflect the light emitted by the first light-emitting device, the second light-emitting device and the third light-emitting device; The dimming layer in the second light-emitting device is a second dimming layer, which is configured to reflect the light emitted by the second light-emitting device and the third light-emitting device, and transmit the light emitted by the first light-emitting device. The dimming layer in the third light-emitting device is a third dimming layer, which is configured to reflect the light emitted by the third light-emitting device and transmit the light emitted by the first light-emitting device and the second light-emitting device.

42. The light-emitting substrate according to claim 40 or 41, wherein, The light emitted by the light-emitting layers in multiple light-emitting devices of the same light-emitting unit is of the same color; At least one of the light-emitting devices further includes: a color conversion layer disposed on the side of the first electrode and the second electrode that is away from the driving substrate, relative to the one that is away from the driving substrate; The orthographic projection of the light-emitting layer of the light-emitting device onto the driving substrate is located within the orthographic projection range of the color conversion layer onto the driving substrate; The color conversion layer is configured to convert the light emitted by the light-emitting layer into light of a set color.

43. The light-emitting substrate according to claim 40 or 41, wherein, The light emitted by the light-emitting layers of at least two light-emitting devices in the same light-emitting unit is of different colors.

44. The light-emitting substrate according to any one of claims 21 to 43, wherein, The wavelength of the light emitted by the first light-emitting device is greater than the wavelength of the light emitted by the second light-emitting device, and the wavelength of the light emitted by the second light-emitting device is greater than the wavelength of the light emitted by the third light-emitting device.

45. The light-emitting substrate according to any one of claims 21 to 44, wherein, The light-emitting device further includes: a first type of semiconductor pattern, a light-emitting layer, and a second type of semiconductor pattern, which are located between the first electrode and the second electrode and are sequentially stacked along the first direction; Compared to the second type of semiconductor pattern, the first type of semiconductor pattern is closer to the light-emitting side of the light-emitting device; the roughness of the surface of the first type of semiconductor pattern away from the light-emitting layer ranges from 0.1 μm to 0.3 μm.

46. ​​A display device, comprising: The driving circuit as described in any one of claims 1 to 20, and / or the light-emitting substrate as described in any one of claims 21 to 45.

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