Light-emitting substrate and display device

Abstract

Provided are a light-emitting substrate and a display device, comprising: a base substrate (01), comprising a plurality of light-emitting units (100) arranged in an array; wherein each light-emitting unit (100) comprises a driving circuit (110) and a light-emitting group coupled to the driving circuit (110), the light-emitting group comprising a plurality of light-emitting elements (120); a first signal wiring (210), located on the base substrate (01) and extending along a first direction (F1); wherein the driving circuits (110) in at least two different light-emitting units (100) along the first direction (F1) are coupled to each other, and the driving circuit (110) comprises a first input terminal (Di), and the first signal wiring (210) is coupled to the first input terminal (Di) of one of the at least two mutually coupled driving circuits (110).

Description

Technical Field

[0001] The present invention relates to the field of light emitting technology, and in particular to a light emitting substrate and a display device. Background Art

[0002] With the development of light-emitting diode technology, backlight sources using submillimeter or even micrometer-level light-emitting diodes have been widely used. As a result, not only can the image contrast of transmissive display products using this backlight source reach the level of organic light-emitting diode (OLED) display products, but the product can also retain the technical advantages of liquid crystal display (LCD), thereby improving the display effect of the picture and providing users with a better visual experience. Summary of the invention

[0003] The light-emitting substrate provided in the embodiment of the present disclosure includes:

[0004] A substrate, comprising a plurality of light-emitting units arranged in an array; wherein each of the light-emitting units comprises a driving circuit and a light-emitting group coupled to the driving circuit, and the light-emitting group comprises a plurality of light-emitting elements;

[0005] A first signal trace, located on the substrate and extending along a first direction;

[0006] Among them, the driving circuits in at least two different light-emitting units along the first direction are coupled to each other, and the driving circuit includes a first input end, and the first signal line is coupled to the first input end of one of the at least two mutually coupled driving circuits.

[0007] In some examples, the driving circuits in the at least two different light-emitting units are coupled via at least one first connecting line.

[0008] In some examples, the driving circuit further includes an output terminal;

[0009] Among the at least two mutually coupled driving circuits, the output end of the driving circuit coupled to the first signal wiring is coupled to the first input end of one of the other driving circuits through the first connecting line.

[0010] In some examples, the plurality of light-emitting units are arranged in N rows and M columns and divided into a plurality of groups, each group of light-emitting units includes N rows and Y columns, a total of N*Y light-emitting units, and one of the first signal traces corresponds to one light-emitting unit group;

[0011] In the same light-emitting unit group, the N×Y light-emitting units are sequentially numbered according to their row and column distribution positions. The first input end of the driving circuit of the light-emitting unit numbered 1 is electrically connected to the first signal trace corresponding to this group of light-emitting units. The output end of the driving circuit of the light-emitting unit numbered P is electrically connected to the first input end of the driving circuit of the light-emitting unit numbered P + 1 through the first connection line;

[0012] N is an integer greater than 0, M is an integer greater than 0, 0 < Y ≤ M and Y is an integer, 0 < P < N×Y and P is an integer.

[0013] In some examples, in the same light-emitting unit group, the light-emitting unit numbered 1 and the light-emitting unit numbered N×Y are adjacently arranged in the second direction. The output end of the driving circuit of the light-emitting unit numbered N×Y / 2 is adjacently arranged in the second direction to the driving circuit of the light-emitting unit numbered N×Y / 2 + 1.

[0014] In some examples, the light-emitting substrate further includes an output trace; the output trace extends along the first direction;

[0015] The output end of the driving circuit of the light-emitting unit numbered N×Y is electrically connected to the output trace.

[0016] In some examples, at least one of the first connection line and the output trace is located on a side of the first signal trace away from the substrate; or,

[0017] At least one of the first connection line and the output trace is on the same layer as the first signal trace.

[0018] In some examples, the driving circuit further includes a second input end; the light-emitting substrate further includes a second signal trace;

[0019] The second signal trace is electrically connected to the second input end of the driving circuit.

[0020] In some examples, the second signal trace extends along the first direction.

[0021] In some examples, the second input ends of all the driving circuits in one light-emitting unit group are electrically connected to the same second signal trace.

[0022] In some examples, one light-emitting unit group includes two columns of light-emitting units;

[0023] In the same light-emitting unit group, the first connection line for coupling the driving circuit is arranged around the second signal trace.

[0024] In some examples, the driving circuit further includes a common voltage terminal; the light-emitting group is electrically connected between the driving voltage terminal and an output terminal of the driving circuit;

[0025] The light-emitting substrate further includes: a common voltage signal line electrically connected to the common voltage terminal, and a driving signal line electrically connected to the driving voltage terminal; wherein the common voltage signal line and the driving signal line both extend along the first direction.

[0026] In some examples, one column of light-emitting units corresponds to one of the common voltage signal lines and one of the driving signal lines.

[0027] In some examples, for the common voltage signal line, the driving signal line, and the second signal line corresponding to a column of light-emitting units, the common voltage signal line is located between the driving signal line and the second signal line.

[0028] In some examples, a light emitting unit group includes two columns of light emitting units;

[0029] The orthographic projections of the two driving signal lines corresponding to the same light-emitting unit group on the base substrate are arranged axially symmetrically with respect to the orthographic projection of the second signal line on the base substrate.

[0030] In some examples, a light emitting unit group includes two columns of light emitting units;

[0031] The orthographic projections of the two common voltage signal wires corresponding to the same light-emitting unit group on the base substrate are arranged axially symmetrically with respect to the orthographic projection of the second signal wire on the base substrate.

[0032] The display device provided by the embodiment of the present disclosure includes the above-mentioned light-emitting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagrams of some light-emitting substrates provided for embodiments of the present disclosure;

[0034] Figure 2 for Figure 1 A schematic diagram of the arrangement of the light-emitting units of the light-emitting substrate shown;

[0035] Figure 3 A waveform diagram of a second input signal in a driving circuit provided in an embodiment of the present disclosure;

[0036] Figure 4 A schematic diagram of the working process of the driving circuit provided in the embodiment of the present disclosure;

[0037] Figure 5 A signal timing diagram of a driving circuit provided by an embodiment of the present disclosure;

[0038] Figure 6 A schematic diagram of the numbering method of the light-emitting units of the light-emitting substrate provided in an embodiment of the present disclosure;

[0039] Figure 7 A schematic diagram of the layout structure of the light-emitting substrate provided in an embodiment of the present disclosure;

[0040] Figure 8a Some partial cross-sectional structural schematic diagrams of the light-emitting substrate provided in the embodiments of the present disclosure;

[0041] Figure 8b Some further partial cross-sectional structural schematic diagrams of the light-emitting substrate provided in the embodiments of the present disclosure;

[0042] Fig. 9 Some simplified structural schematic diagrams of the light-emitting substrate provided in the embodiments of the present disclosure;

[0043] Fig.10 Some further simplified structural schematic diagrams of the light-emitting substrate provided in the embodiments of the present disclosure;

[0044] Fig.11 A schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0046] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0047] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, but are only intended to illustrate the content of the present invention. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0048] Mini Light Emitting Diode (Mini-LED) or Micro Light Emitting Diode (Micro-LED) is small in size and high in brightness. It can be widely used in display devices or their backlight modules. By fine-tuning the backlight, high dynamic range images (High-Dynamic Range, HDR) can be displayed. For example, the typical size (such as length) of Micro-LED is less than 100 microns, such as 10 microns to 80 microns; the typical size (such as length) of Mini-LED is 80 microns to 350 microns, such as 80 microns to 120 microns. Since the light-emitting diode is a current-driven component, the signal line needs to transmit the current signal from the driver chip to the light-emitting diode. If each light-emitting diode in the backlight module is independently controlled, multiple signal lines are required to connect to the corresponding light-emitting diode to provide signals, and due to the limitation of wiring space, signal interference may occur between signal lines.

[0049] At least one embodiment of the present disclosure provides a light-emitting substrate and a display device. The light-emitting substrate can realize independent control of the light-emitting brightness in different regions, has low power consumption, high integration, and a simple control method, and can cooperate with a passive display device such as a liquid crystal panel to realize high-contrast display. In addition, the light-emitting substrate can reduce signal interference and improve display effects.

[0050] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the same reference numerals in different drawings will be used to refer to the same elements that have been described.

[0051] like Figure 1 As shown, at least one embodiment of the present disclosure provides a light-emitting substrate, which includes a substrate substrate 01, and the substrate substrate 01 includes a plurality of light-emitting units 100 arranged in an array. Each light-emitting unit 100 may include a driving circuit 110 and a light-emitting group coupled to the driving circuit 110, and the light-emitting group includes a plurality of light-emitting elements 120. Exemplarily, the driving circuit 110 may include a first input terminal Di, a second input terminal Pwr, and an output terminal OT, and the plurality of light-emitting elements 120 are sequentially connected in series and connected between the driving voltage terminal Vled and the output terminal OT.

[0052] like Figure 1 and Figure 2As shown, the light-emitting substrate 10 includes a base substrate 01 and a plurality of light-emitting units 100 arranged in an array on the base substrate 01. For example, the plurality of light-emitting units 100 are arranged in N rows and M columns, where N is an integer greater than 0 and M is an integer greater than 0. For example, the number of light-emitting units 100 can be determined according to actual needs, such as the size of the light-emitting substrate 10 and the required brightness. Figure 1 Only 4 rows and 4 columns of light emitting units 100 are shown, but it should be understood that the number of light emitting units 100 is not limited thereto.

[0053] For example, Figure 1 and Figure 2 As shown, each column of light-emitting units 100 is arranged along the first direction F1, and each row of light-emitting units 100 is arranged along the second direction F2. For example, the light-emitting substrate is rectangular, wherein the first direction F1 is a direction parallel to the long side of the light-emitting substrate 10, and the second direction F2 is a direction parallel to the short side of the light-emitting substrate 10; of course, the first direction F1 can also be a direction parallel to the short side of the light-emitting substrate 10, and the second direction F2 can also be a direction parallel to the long side of the light-emitting substrate 10. Of course, the embodiments of the present disclosure are not limited to this, and the first direction F1 and the second direction F2 can be any direction, as long as the first direction F1 and the second direction F2 intersect. In addition, the multiple light-emitting units 100 are not limited to being arranged along a straight line, and can also be arranged along a fold line, along a ring, or in any manner. This can be determined according to actual needs, and the embodiments of the present disclosure are not limited to this.

[0054] Exemplarily, the material of the substrate 01 may be selected from plastic, polyimide, silicon, ceramic, glass, quartz, etc., which is not limited in the embodiments of the present disclosure.

[0055] In some examples, when implementing, Figure 1 As shown, each light-emitting unit 100 may include a driving circuit 110, a plurality of light-emitting elements 120 and a driving voltage terminal Vled. The driving circuit 110 includes a first input terminal Di, a second input terminal Pwr, an output terminal OT and a common voltage terminal GND. The light-emitting group is electrically connected between the driving voltage terminal Vled and the output terminal OT of the driving circuit 110. For example, the light-emitting elements 120 in the light-emitting group are sequentially connected in series and electrically connected between the driving voltage terminal Vled and the output terminal OT of the driving circuit 110. Of course, the light-emitting elements 120 in each light-emitting group may also be connected in parallel to be electrically connected between the driving voltage terminal Vled and the output terminal OT of the driving circuit 110. Alternatively, the light-emitting elements 120 in each light-emitting group may also be connected in parallel to be electrically connected between the driving voltage terminal Vled and the output terminal OT of the driving circuit 110 after some of the light-emitting elements 120 are connected in series. In practical applications, the design can be determined according to actual needs and is not limited here.

[0056] In some examples, in a specific implementation, the driving circuit 110 can be configured to output a relay signal through the output terminal OT in a first time period according to a first input signal received by the first input terminal Di and a second input signal received by the second input terminal Pwr, and provide a driving signal to a plurality of light-emitting elements 120 connected in series in sequence through the output terminal OT in a second time period. Exemplarily, the first input terminal Di receives a first input signal, which is, for example, an address signal, for gating the driving circuit 110 of the corresponding address. For example, the addresses of different driving circuits 110 can be the same or different. The first input signal can be an 8-bit address signal, and the address to be transmitted can be obtained by parsing the address signal. The second input terminal Pwr receives a second input signal, which is, for example, a power line carrier communication signal. For example, the second input signal not only provides power to the driving circuit 110, but also transmits communication data to the driving circuit 110, which can be used to control the light-emitting duration of the corresponding light-emitting unit 100, and then control its visual light-emitting brightness. The output terminal OT can output different signals in different time periods, for example, respectively outputting a relay signal and a driving signal. For example, the relay signal is an address signal provided to other drive circuits 110, that is, the first input terminal Di of other drive circuits 110 receives the relay signal as the first input signal, thereby obtaining the address signal. For example, the drive signal can be a drive current for driving the light-emitting element 120 to emit light. The common voltage terminal GND receives a common voltage signal, such as a ground signal.

[0057] The driving circuit 110 is configured to output a relay signal through the output terminal OT in a first time period according to a first input signal received by the first input terminal Di and a second input signal received by the second input terminal Pwr, and to provide a driving signal to a plurality of light-emitting elements 120 connected in series in a second time period through the output terminal OT. In the first time period, the output terminal OT outputs a relay signal, and the relay signal is provided to other driving circuits 110 so that the other driving circuits 110 obtain address signals. In the second time period, the output terminal OT outputs a driving signal, and the driving signal is provided to a plurality of light-emitting elements 120 connected in series in a second time period, so that the light-emitting elements 120 emit light in the second time period. For example, the first time period and the second time period are different time periods, and the first time period may be earlier than the second time period, for example. The first time period may be continuously connected to the second time period, and the end time of the first time period is the start time of the second time period; or, there may be other time periods between the first time period and the second time period, and the other time periods may be used to realize other required functions, and the other time periods may also be used only to separate the first time period and the second time period, so as to avoid interference between the signals of the output terminal OT in the first time period and the second time period.

[0058] It should be noted that when the driving signal is a driving current, the driving current can flow from the output terminal OT to the light-emitting element 120, or flow from the light-emitting element 120 into the output terminal OT. The direction of the driving current can be determined according to actual needs, and the embodiments of the present disclosure do not limit this. In this article, "the output terminal OT outputs a driving signal" means that the output terminal OT provides a driving signal, and the direction of the driving signal can flow from the output terminal OT or flow into the output terminal OT.

[0059] For example, Figure 1 As shown, a plurality of light-emitting elements 120 are sequentially connected in series and are connected in series between the driving voltage terminal Vled and the output terminal OT. For example, the light-emitting element 120 may be a micro light-emitting diode (Micro-LED) or a mini light-emitting diode (Mini-LED). For example, each light-emitting element 120 includes a positive electrode (+) and a negative electrode (-) (or, may also be referred to as an anode and a cathode), and the positive electrodes and negative electrodes of the plurality of light-emitting elements 120 are sequentially connected in series, thereby forming a current flow path between the driving voltage terminal Vled and the output terminal OT. In addition, the driving voltage terminal Vled may provide a driving voltage, for example, a high voltage in a period (second period) when the light-emitting element 120 needs to emit light, and a low voltage in other periods. Thus, in the second period, a driving signal (such as a driving current) flows from the driving voltage terminal Vled through the plurality of light-emitting elements 120 in sequence, and then flows into the output terminal OT of the driving circuit 110. The plurality of light-emitting elements 120 emit light when the driving current flows therethrough, and by controlling the duration of the driving current, the light-emitting duration of the light-emitting element 120 may be controlled, thereby controlling the visual light-emitting brightness.

[0060] For example, Figure 1 As shown, in some examples, a light-emitting unit 100 may include 4 light-emitting elements 120, and the 4 light-emitting elements 120 are arranged in 2 rows and 4 columns. For example, when the 4 light-emitting elements 120 are connected in series, the light-emitting element 120 electrically connected to the driving voltage terminal Vled is used as the starting point of the series connection of the 4 light-emitting elements 120, and the light-emitting element 120 electrically connected to the output terminal OT of the driving circuit 110 is used as the end point of the series connection of the 4 light-emitting elements 120. For example, the driving voltage terminal Vled is electrically connected to the positive electrode of the light-emitting element 120, and the output terminal OT of the driving circuit 110 is electrically connected to the negative electrode of the light-emitting element 120. By adopting this distribution method and series connection method, the overlapping of the routing can be effectively avoided, which is convenient for design and preparation. In addition, the length of the signal connection line between any two adjacent light-emitting elements 120 on the series line can be set to be roughly the same, so that the resistance of the signal connection line itself is relatively balanced, which can improve the load balance and improve the stability of the circuit.

[0061] It should be noted that in the embodiments of the present disclosure, the number of light-emitting elements 120 in each light-emitting unit 100 is not limited, and can be any number such as 5, 6, 7, 8, etc., but not limited to 4. The plurality of light-emitting elements 120 can be arranged in any manner, for example, in a desired pattern, and not limited to a matrix arrangement. The location of the drive circuit 110 is not limited, and can be set in any gap between the light-emitting elements 120, which can be determined according to actual needs, and the embodiments of the present disclosure do not limit this.

[0062] In some examples, in specific implementations, combined with Figure 1 and Figure 7 As shown, the light emitting elements 120 in the same light emitting unit 100 are sequentially connected to form a polygon. For example, when the light emitting unit includes four light emitting elements 120, the four light emitting elements 120 can be sequentially connected to form a quadrilateral. Two sides of the quadrilateral can be parallel to the row direction, and the other two sides can be parallel to the column direction. Alternatively, two sides of the quadrilateral can also have an angle with the row direction, and the other two sides can also have an angle with the column direction.

[0063] In some examples, in specific implementations, combined with Figure 1 and Figure 7 As shown, in the same light-emitting unit group, in the light-emitting units 100 adjacent in the row direction, the relative position relationship of the light-emitting elements 120 in each light-emitting unit 100 is the same, and is periodically and repeatedly arranged along the column direction F1. Further, in different groups of light-emitting units, in the light-emitting units 100 adjacent in the column direction, the relative position relationship of the light-emitting elements 120 in each light-emitting unit 100 is also the same. Exemplarily, in the same light-emitting unit group, in a plurality of light-emitting units 100 arranged sequentially in the column direction, the light-emitting elements 120 located at the same position in each light-emitting unit 100 may be arranged along the column direction F1. For example, in a plurality of light-emitting units 100 arranged in the column direction, the light-emitting elements 120 located at the same position in each light-emitting unit 100 may be arranged approximately on the same straight line along the column direction. Exemplarily, in combination Figure 1 As shown, the straight line L1 extends along the column direction, and the light-emitting elements 120 passed through by the straight line L1 are the light-emitting elements 120 at the same position in the light-emitting units 100 arranged in the column direction, that is, the light-emitting elements 120 at the same position in the light-emitting units 100 arranged in the column direction can be roughly arranged on a straight line L1 along the column direction. The straight line L2 extends along the column direction, and the light-emitting elements 120 passed through by the straight line L2 are the light-emitting elements 120 at other same positions in the light-emitting units 100 arranged in the column direction, that is, the light-emitting elements 120 at other same positions in the light-emitting units 100 arranged in the column direction can be roughly arranged on a straight line L2 along the column direction.

[0064] In some embodiments, in combination Figure 1 As shown, in the light-emitting units 100 adjacent in the row direction, the light-emitting elements 120 located at the same position in each light-emitting unit 100 can be arranged roughly on the same straight line along the row direction F2. For example, the straight line L3 extends along the row direction, and the light-emitting elements 120 passed by the straight line L3 are the light-emitting elements 120 at the same position in the light-emitting units 100 arranged in the row direction, that is, the light-emitting elements 120 at the same position in the light-emitting units 100 arranged in the column direction can be arranged roughly on a straight line L3 along the row direction F2.

[0065] In some examples, in specific implementations, combined with Figure 1 and Figure 7 As shown, in the same light-emitting unit group, the relative positions of the driving circuits in the light-emitting units 100 adjacent in the row direction may be different, and the positions of the driving circuits in the light-emitting units 100 adjacent in the column direction may be the same. Furthermore, the driving circuits in the light-emitting units in two adjacent columns in the same light-emitting unit group may be arranged in a staggered manner.

[0066] For ease of description, the light-emitting units in the light-emitting substrate are labeled according to the arrangement of rows and columns. For example, the coordinates corresponding to the light-emitting units in the bth column and the ath row may be (b, a), 1≤a≤M, 1≤b≤N. For example, in a light-emitting unit group, for example, for the first light-emitting unit group FGZ-1:

[0067] The driving circuit in the light-emitting unit (1, 1), the driving circuit in the light-emitting unit (1, 2) and the driving circuit in the light-emitting unit (2, 1) are respectively located on three vertices of a triangle, for example, they may be on the three vertices of a first equilateral triangle; the driving circuit in the light-emitting unit (2, 1), the driving circuit in the light-emitting unit (1, 2) and the driving circuit in the light-emitting unit (2, 2) may be respectively located on three vertices of a triangle, for example, they may be on the three vertices of a second equilateral triangle; the driving circuit in the light-emitting unit (2, 1), the driving circuit in the light-emitting unit (2, 2) and the driving circuit in the light-emitting unit (3, 1) may be respectively located on three vertices of a triangle, for example, they may be on the three vertices of a third equilateral triangle; the driving circuit in the light-emitting unit (3, 1), the driving circuit in the light-emitting unit (2, 2) and the driving circuit in the light-emitting unit (3, 2) may be respectively located on three vertices of a triangle, for example, they may be on the three vertices of a fourth equilateral triangle.

[0068] The line connecting the center of the first equilateral triangle and the center of the third equilateral triangle is parallel to the column direction F1 ; and the line connecting the center of the second equilateral triangle and the center of the fourth equilateral triangle is also parallel to the column direction F1 .

[0069] The arrangement rules of the driving circuits in other light-emitting units belonging to the same light-emitting unit group are the same as described above, and so on, which will not be repeated here.

[0070] For two adjacent light emitting unit groups, the first light emitting unit group FGZ-1 and the second light emitting unit group FGZ-2:

[0071] The driving circuit in the light-emitting unit (1, 2) belonging to the first light-emitting unit group FGZ-1 and the driving circuit in the light-emitting unit (1, 3) and the driving circuit in the light-emitting unit (2, 3) belonging to the second light-emitting unit group FGZ-2 can be respectively located on the three vertices of a triangle, for example, the three vertices of a fifth equilateral triangle; the driving circuit in the light-emitting unit (2, 3) belonging to the second light-emitting unit group FGZ-2 and the driving circuit in the light-emitting unit (1, 2) and the driving circuit in the light-emitting unit (2, 2) belonging to the first light-emitting unit group FGZ-1 can be respectively located on the three vertices of a triangle, for example, the three vertices of a sixth equilateral triangle; the driving circuit in the light-emitting unit (1, 3) and the driving circuit in the light-emitting unit (1, 4) and the driving circuit in the light-emitting unit (2, 3) belonging to the second light-emitting unit group FGZ-2 can be respectively located on the three vertices of a triangle, for example, the three vertices of a seventh equilateral triangle.

[0072] Among them, the line connecting the centers of the first equilateral triangle, the fifth equilateral triangle, and the seventh equilateral triangle is parallel to the row direction F2; and the line connecting the centers of the second equilateral triangle and the sixth equilateral triangle is parallel to the row direction F2.

[0073] The arrangement of the driving circuits in the plurality of light-emitting units on the light-emitting substrate can be designed according to the above rules, which will not be described in detail here. Figure 1 and Figure 7 As shown, along the row direction, the arrangement of the light-emitting elements and the driving circuit in a light-emitting unit group is used as a repeating unit. The light-emitting substrate 10 may include multiple repeating units, and adjacent repeating units are arranged at intervals and periodically arranged along the row direction. In this way, a light-emitting unit group can be repeatedly arranged as a repeating unit to form the light-emitting substrate 10. In this way, among the light-emitting units 100 arranged in the row direction, the relative positions of the multiple light-emitting elements 120 and the driving circuit 110 in each light-emitting unit 100 can be substantially the same. In some examples, in a specific implementation, the driving circuit 110 may include a demodulation circuit, a physical layer interface circuit, a data processing control circuit, a pulse width modulation circuit, a drive signal generation circuit, a relay signal generation circuit, and a power supply circuit.

[0074] Exemplarily, the demodulation circuit is electrically connected to the second input terminal Pwr and the physical layer interface circuit, and is configured to demodulate the second input signal to obtain communication data, and transmit the communication data to the physical layer interface circuit. For example, the second input signal input by the second input terminal Pwr is a power line carrier communication signal, and the power line carrier communication signal contains information corresponding to the communication data. For example, the communication data is data reflecting the light emission duration, and thus represents the required light emission brightness. Compared with the conventional Serial Peripheral Interface (SPI) protocol, in the embodiments of the present disclosure, by adopting the Power Line Carrier Communication (PLC) protocol, the communication data is superimposed on the power supply signal, thereby effectively reducing the number of signal lines.

[0075] Figure 3 Schematically shows a waveform diagram of the second input signal of the driving circuit 110. As Figure 3 shown, the dashed ellipse indicates an enlarged view of the corresponding waveform. When the second input signal is at a high level, the amplitude of its high level fluctuates near the threshold amplitude Vth. For example, it varies between a first amplitude V1 and a second amplitude V2, where V2 < Vth < V1. By modulating the variation law of the first amplitude V1 and the second amplitude V2, the communication data can be modulated into the second input signal, so that the second input signal transmits information corresponding to the communication data while transmitting electric energy. For example, the demodulation circuit filters out the DC power supply component of the second input signal, thereby obtaining the communication data. For a detailed description of the second input signal, reference can be made to the conventional power line carrier communication signal, which will not be elaborated here. Correspondingly, for a detailed description of the demodulation circuit, reference can also be made to the demodulation circuit of the conventional power line carrier communication signal, which will not be elaborated here.

[0076] Exemplarily, the physical layer interface circuit is also electrically connected to the data processing and control circuit, and is configured to process the communication data to obtain a data frame (such as frame rate data), and transmit the data frame to the data processing and control circuit. The data frame obtained by the physical layer interface circuit contains information that needs to be transmitted to the driving circuit 110, such as information related to the light emission time (such as the specific duration of the light emission time). For example, the physical layer interface circuit can be a conventional port physical layer (PHY), and for a detailed description, reference can be made to the conventional design, which will not be elaborated here.

[0077] Exemplarily, the data processing control circuit is also electrically connected to the first input terminal Di, the pulse width modulation circuit and the relay signal generating circuit. The data processing control circuit is configured to generate a pulse width control signal based on the data frame and transmit the pulse width control signal to the pulse width modulation circuit, and to generate a relay control signal based on the first input signal and transmit the relay control signal to the relay signal generating circuit. For example, the required light-emitting duration of the light-emitting element 120 connected to the drive circuit 110 can be known according to the data frame, so the corresponding pulse width control signal is generated based on the light-emitting duration. For example, the relay control signal is a signal generated after the data processing control circuit processes the first input signal. By processing the first input signal (for example, parsing, latching, decoding, etc.), the address signal corresponding to the drive circuit 110 can be known, and a relay control signal corresponding to a subsequent address can be generated, and the subsequent address corresponds to other drive circuits 110. For example, the data processing control circuit can be implemented as a single-chip microcomputer, a central processing unit (CPU), a digital signal processor, etc.

[0078] Exemplarily, the pulse width modulation circuit is also electrically connected to the drive signal generating circuit, and is configured to generate a pulse width modulation signal in response to the pulse width control signal, and transmit the pulse width modulation signal to the drive signal generating circuit. For example, the pulse width modulation signal generated by the pulse width modulation circuit corresponds to the light-emitting duration required by the light-emitting element 120, for example, the effective pulse width duration is equal to the light-emitting duration required by the light-emitting element 120. For example, the detailed description of the pulse width modulation circuit can refer to the conventional pulse width modulation circuit, which will not be described in detail here.

[0079] Exemplarily, the drive signal generating circuit is also electrically connected to the output terminal OT, and is configured to generate a drive signal in response to the pulse width modulation signal, and output the drive signal from the output terminal OT. Here, outputting the drive signal from the output terminal OT may mean that the drive signal (e.g., drive current) flows from the output terminal OT to the light emitting element 120, or may mean that the drive signal (e.g., drive current) flows from the light emitting element 120 to the output terminal OT, and the specific current direction is not limited.

[0080] Exemplarily, in some examples, when the driving signal is a driving current, the driving signal generating circuit may include a current source and a metal oxide semiconductor (MOS) field effect transistor (FET), and the metal oxide semiconductor field effect transistor is referred to as a MOS tube. The control electrode of the MOS tube receives a pulse width modulation signal transmitted by a pulse width modulation circuit, thereby turning on or off under the control of the pulse width modulation signal. The first electrode of the MOS tube is connected to the output terminal OT, the second electrode of the MOS tube is connected to the first electrode of the current source, and the second electrode of the current source is connected to the common voltage terminal GND to receive a common voltage. For example, the current source may be a constant current source.

[0081] When the pulse width modulation signal is at a valid level, the MOS tube is turned on, and the current source provides a driving current through the output terminal OT. When the pulse width modulation signal is at an invalid level, the MOS tube is cut off, and the output terminal OT does not provide a driving current. The duration of the effective level of the pulse width modulation signal is equal to the conduction duration of the MOS tube, and the conduction duration of the MOS tube is equal to the duration of the output terminal OT providing the driving current. Thus, the light-emitting duration of the light-emitting element 120 can be further controlled, thereby controlling the visual luminous brightness. For example, in some examples, when the MOS tube is turned on, the driving current flows from the OT terminal into the driving circuit 110, and flows through the MOS tube and the current source in sequence, and then flows into the ground terminal (for example, the common voltage terminal GND). It should be noted that in the embodiments of the present disclosure, the drive signal generation circuit can also adopt other circuit structure forms, and the embodiments of the present disclosure are not limited to this.

[0082] Exemplarily, the relay signal generating circuit is also electrically connected to the output terminal OT, and is configured to generate a relay signal based on the relay control signal, and output the relay signal from the output terminal OT. For example, the relay control signal corresponds to a subsequent address, and the relay signal generated based on the relay control signal includes a subsequent address, and the subsequent address corresponds to other drive circuits 110. After the relay signal is output from the output terminal OT, it is provided to the first input terminal Di of the separately provided drive circuit 110, and the relay signal is input as a first input signal to the separately provided drive circuit 110, so that the separately provided drive circuit 110 obtains the corresponding address signal. The relay signal generating circuit can be implemented by a latch, a decoder, an encoder, etc., and the embodiments of the present disclosure are not limited to this.

[0083] It should be noted that in the embodiment of the present disclosure, although the drive signal generating circuit and the relay signal generating circuit are both electrically connected to the output terminal OT, the drive signal generating circuit and the relay signal generating circuit respectively output the drive signal and the relay signal in different time periods, and the drive signal and the relay signal are transmitted through the output terminal OT in a time-sharing manner, and therefore will not affect each other.

[0084] Exemplarily, the power supply circuit is electrically connected to the demodulation circuit and the data processing control circuit, respectively, and is configured to receive electric energy and supply power to the data processing control circuit. For example, the second input signal is a power line carrier communication signal. After being demodulated by the demodulation circuit, the DC power component (i.e., electric energy) in the second input signal is transmitted to the power supply circuit, and then provided to the data processing control circuit by the power supply circuit. Of course, the embodiments of the present disclosure are not limited to this, and the power supply circuit can also be electrically connected to other circuits in the drive circuit 110 to provide electric energy. The power supply circuit can be implemented by a switching circuit, a voltage conversion circuit, a voltage stabilizing circuit, etc., and the embodiments of the present disclosure are not limited to this.

[0085] It should be noted that in the embodiments of the present disclosure, the driving circuit 110 may also include more circuits and components, not limited to the above-mentioned demodulation circuit, physical layer interface circuit, data processing control circuit, pulse width modulation circuit, driving signal generating circuit, relay signal generating circuit and power supply circuit. This can be determined according to the functions to be implemented, and the embodiments of the present disclosure do not limit this.

[0086] Figure 4 Schematic diagram of the working process of the driving circuit 110 is shown. Figure 5 Schematic diagram of the signal timing of the driving circuit 110. Figure 4 and Figure 5 As shown, when the driving circuit 110 is working, it is first powered on (i.e., powered on) to complete initialization, and then performs an address writing operation in a period S1, that is, in the period S1, the first input signal Di_1 is input into the driving circuit 110 through the first input terminal Di, thereby writing the address. For example, the first input signal Di_1 is sent through a transmitter provided separately.

[0087] Next, in the period S2, the driving configuration is performed, and the relay signal Di_2 is output through the output terminal OT. For example, the relay signal Di_2 is input as a first input signal to the first input terminal Di of the separately provided driving circuit 110. For example, the aforementioned first period is the period S2.

[0088] Then, in period S3, the driving voltage terminal Vled is powered on. For example, after the plurality of driving circuits 110 have acquired the corresponding addresses, the period S3 is entered after about 10 microseconds. At this time, the driving voltage provided by the driving voltage terminal Vled becomes a high level.

[0089] Then, in the period S4, the driving circuit 110 is in the normal working mode, and the output terminal OT provides a driving signal (e.g., a driving current) according to the required duration, so that the light-emitting element 120 connected to the driving circuit 110 emits light according to the required duration. For example, the aforementioned second period is the period S4. For example, in the case of a backlight unit as a display device, the light-emitting substrate 10 using the driving circuit 110 works in a local backlight adjustment (Local Dimming) mode, which can achieve a high dynamic range effect.

[0090] Finally, in the period S5, the system is turned off, that is, the driving circuit 110 is powered off, and the driving voltage provided by the driving voltage terminal Vled becomes a low level, and the light emitting element 120 stops emitting light.

[0091] It should be noted that the above workflow is only illustrative and not restrictive. The actual workflow of the driving circuit 110 can be determined according to actual needs, and the embodiments of the present disclosure do not limit this. Figure 5 In the figure, VREG, POR, Vreg_1.8, OSC, and Reset_B are all internal signals of the driving circuit 110, and will not be input or output through the first input terminal Di, the second input terminal Pwr, the output terminal OT, and the common voltage terminal GND. Di_1 is the first input signal received by the driving circuit 110, Di_2 is the relay signal output by the driving circuit 110 (that is, the first input signal received by the next connected driving circuit 110), and Di_n is the first input signal received by the nth driving circuit 110 among the multiple driving circuits 110 connected in sequence.

[0092] Exemplarily, in a specific implementation, the control circuit 110 can be configured as a chip, the chip size (e.g., length) can be tens of microns, and the chip area is about hundreds of square microns or even smaller, which is similar to the size of Mini-LED, and has the characteristics of miniaturization, which is convenient for integration into the light-emitting substrate 10 (e.g., bound and connected to the surface of the light-emitting substrate 10), saving the setting space of the printed circuit board, simplifying the structure, and facilitating the realization of lightness and thinness. Each control circuit 110 directly drives a light-emitting unit 100, avoiding the problems of complex operation and easy flickering of the row scanning control method. In addition, the drive circuit 110 has a small number of ports, a small number of required signals, a simple control method, a simple wiring method, and a low cost.

[0093] In some examples, when implementing, Figure 1 and Figure 7As shown, the light-emitting substrate may include a first signal trace 210 located on a substrate 01 and extending along a first direction F1. Among them, the driving circuits 110 in at least two different light-emitting units 100 along the first direction F1 are coupled to each other, and the first signal trace 210 is coupled to a first input terminal Di of one of the driving circuits 110 in at least two mutually coupled driving circuits 110. Exemplarily, the driving circuits 110 in at least two different adjacent light-emitting units 100 in the column direction may be coupled to each other, so that the driving circuits 110 can be cascaded in the column direction. And by coupling the first signal trace 210 to the first input terminal Di of the driving circuit 110, a first input signal can be input to the first input terminal Di of the driving circuit 110 through the first signal trace 210. This can make the cascading direction of the first signal trace 210 and the driving circuit 110 consistent, reduce the signal overlap area, and reduce signal interference.

[0094] In some examples, during specific implementation, such as Figure 1 and Figure 7 As shown, the driving circuits 110 in at least two different light-emitting units 100 are coupled through at least one first connection line 310. Exemplarily, the driving circuits 110 in two different light-emitting units 100 may be coupled through a first connection line 310.

[0095] In some examples, during specific implementation, such as Figure 1 and Figure 5 As shown, among at least two mutually coupled driving circuits 110, an output terminal OT of the driving circuit 110 coupled to the first signal trace 210 is coupled to a first input terminal Di of one of the other driving circuits 110 through a first connection line 310.

[0096] Exemplarily, a plurality of light-emitting units 100 in the light-emitting substrate 10 may be arranged in N rows and M columns and divided into multiple groups. Each group of light-emitting units 100 may include N rows and Y columns, a total of N*Y light-emitting units 100, and a first signal trace 210 is correspondingly arranged for one group of light-emitting units. Exemplarily, the light-emitting units 100 may be divided into M / Y groups. Among them, N is an integer greater than 0, M is an integer greater than 0, 0 < Y ≤ M and Y is an integer. For example, Y = 2 may be set, so that adjacent two columns of light-emitting units 100 form a group of light-emitting units. Then adjacent two columns of light-emitting units 100 may correspond to a first signal trace 210. For example, Figure 1As shown, the first column of light-emitting units 100 and the second column of light-emitting units 100 can form a first light-emitting unit group FGZ-1, and the third column of light-emitting units 100 and the fourth column of light-emitting units 100 can form a second light-emitting unit group FGZ-2. Then, the first light-emitting unit group FGZ-1 corresponds to one first signal trace 210, and the second light-emitting unit group FGZ-2 corresponds to another first signal trace 210. In this way, the number of first signal traces 210 in the light-emitting substrate 10 can be M / 2.

[0097] For example, in Figure 1 the example shown, taking N = 4 as an example, each group of light-emitting units 100 can include a total of 8 light-emitting units 100 arranged in 4 rows and 2 columns. Of course, in actual applications, the specific values of M, N, and Y can be designed and determined according to the requirements of actual applications, and are not limited herein.

[0098] Exemplarily, in the same light-emitting unit group, the N*Y light-emitting units 100 are sequentially numbered according to their row and column distribution positions. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 1 is electrically connected to the first signal trace 210 corresponding to this group of light-emitting units 100, and the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered P is electrically connected to the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered P + 1 through a first connection line 310. Wherein, 0 < P < N*Y and P is an integer. For example, the light-emitting units 100 arranged in the column direction can be electrically connected in cascade through the first connection line 310 in sequence.

[0099] For example, in some examples, as Figure 6 shown, the N*Y light-emitting units 100 can be sequentially numbered in an n shape, Figure 6 where each dotted rectangle represents a light-emitting unit 100, and the numbers of each light-emitting unit 100 are marked in each rectangle. Combining Figure 1 with Figure 6 shown, in the same light-emitting unit group, the light-emitting unit 100 numbered 1 and the light-emitting unit 100 numbered N*Y are adjacent in the second direction F2, and are the two light-emitting units closest to the bonding area FB in the light-emitting unit group; the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered N*Y / 2 is adjacent to the driving circuit 110 of the light-emitting unit 100 numbered N*Y / 2 + 1 in the second direction. And, when 1 ≤ P ≤ N*Y / 2 - 1, the output terminal OT of the driving circuit of the light-emitting unit numbered P is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered P + 1 in sequence along the first direction F1. When N*Y / 2 + 1 ≤ P ≤ N*Y - 1, the output terminal OT of the driving circuit of the light-emitting unit numbered P is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered P + 1 in sequence along the first direction F1.

[0100] For example, in the same light-emitting unit group, the light-emitting unit 100 numbered 1 is adjacent to the light-emitting unit 100 numbered 8 in the second direction F2, and the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 4 is adjacent to the driving circuit 110 of the light-emitting unit 100 numbered 5 in the second direction. The output terminal OT of the driving circuit of the light-emitting unit 100 numbered 1 is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered 2. The output terminal OT of the driving circuit of the light-emitting unit 100 numbered 2 is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered 3. The output terminal OT of the driving circuit of the light-emitting unit 100 numbered 3 is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered 4. The output terminal OT of the driving circuit of the light-emitting unit 100 numbered 4 is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered 5. The output terminal OT of the driving circuit of the light-emitting unit 100 numbered 5 is electrically connected to the first input terminal Di of the driving circuit of the light-emitting unit numbered 6. The output terminal OT of the driving circuit of the light emitting unit 100 numbered 6 is electrically connected to the first input terminal Di of the driving circuit of the light emitting unit numbered 7. The output terminal OT of the driving circuit of the light emitting unit 100 numbered 7 is electrically connected to the first input terminal Di of the driving circuit of the light emitting unit numbered 8.

[0101] In some examples, such as Figure 1 and Figure 7 As shown, the light-emitting substrate further includes an output line 220 ; the output line 220 extends along the first direction F1 ; one light-emitting unit group corresponds to one output line 220 , and the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered N*Y is electrically connected to the output line 220 .

[0102] For example, combined with Figure 1 and Figure 6As shown, in the first light-emitting unit group FGZ-1 formed by the first column of light-emitting units 100 and the second column of light-emitting units 100, the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 1 is electrically connected to the first signal wiring 210 corresponding to the first light-emitting unit group FGZ-1, and the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered N*Y is electrically connected to the output wiring 220 corresponding to the first light-emitting unit group FGZ-1. The output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered P is electrically connected to the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered P+1 through a first connecting line 310, that is, the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered P+1 receives the relay signal output by the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered P as the first input signal. In the second light emitting unit group FGZ-2 formed by the third column of light emitting units 100 and the fourth column of light emitting units 100, the first input terminal Di of the driving circuit 110 of the light emitting unit 100 numbered 1 is electrically connected to the first signal wiring 210 corresponding to the second light emitting unit group FGZ-2, and the output terminal OT of the driving circuit 110 of the light emitting unit 100 numbered N*Y is electrically connected to the output wiring 220 corresponding to the second light emitting unit group FGZ-2. The output terminal OT of the driving circuit 110 of the light emitting unit 100 numbered P is electrically connected to the first input terminal Di of the driving circuit 110 of the light emitting unit 100 numbered P+1 through a first connecting line 310, that is, the first input terminal Di of the driving circuit 110 of the light emitting unit 100 numbered P+1 receives the relay signal output by the output terminal OT of the driving circuit 110 of the light emitting unit 100 numbered P as the first input signal.

[0103] For example, combined with Figure 1 , Figures 6 to 8bAs shown, taking the first light-emitting unit group FGZ-1 as an example, in the first light-emitting unit group FGZ-1, the light-emitting unit 100 numbered 1 is located in the first column of the fourth row, the light-emitting unit 100 numbered 2 is located in the first column of the third row, the light-emitting unit 100 numbered 3 is located in the first column of the second row, the light-emitting unit 100 numbered 4 is located in the first column of the first row, the light-emitting unit 100 numbered 5 is located in the second column of the first row, the light-emitting unit 100 numbered 6 is located in the second column of the second row, the light-emitting unit 100 numbered 7 is located in the second column of the third row, and the light-emitting unit 100 numbered 8 is located in the second column of the fourth row. Among them, the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 1 is electrically connected to the first signal wiring 210 corresponding to the first light-emitting unit group FGZ-1. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 2 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 1 through a first connecting line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 3 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 2 through a first connection line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 4 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 3 through a first connection line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 5 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 4 through a first connection line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 6 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 5 through a first connection line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 7 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 6 through a first connecting line 310. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 8 is electrically connected to the output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 7 through a first connecting line 310. The output terminal OT of the driving circuit 110 of the light-emitting unit 100 numbered 8 is electrically connected to the output wiring 220 corresponding to the first light-emitting unit group FGZ-1. The rest is similar, and so on, which will not be repeated here.

[0104] In some examples, when implementing, Figure 1 and Figure 7 As shown, the light-emitting substrate may further include a second signal wire 230 , wherein the second signal wire 230 is electrically connected to the second input terminal Pwr of the driving circuit 110 . In this way, the second input signal may be transmitted to the second input terminal Pwr of the driving circuit 110 through the second signal wire 230 .

[0105] In some examples, when implementing, Figure 1 and Figure 7 As shown, the second signal line 230 can extend along the first direction F1, so that the first signal line 210 and the second signal line 230 can extend along the same direction, which is convenient for wiring design.

[0106] In some examples, when implementing, Figure 1 and Figure 7 As shown, the second signal wiring 230 can be set to multiple. In order to reduce the number of second signal wirings 230 as much as possible and reduce the wiring density, the second input terminals Pwr of all driving circuits 110 in one light-emitting unit group can be electrically connected to the same second signal wiring 230. That is, one light-emitting unit group corresponds to one second signal wiring 230. For example, the first light-emitting unit group FGZ-1 corresponds to one second signal wiring 230, and the second input terminals Pwr of all driving circuits 110 in the first light-emitting unit group FGZ-1 are electrically connected to the corresponding second signal wiring 230. The second light-emitting unit group FGZ-2 corresponds to another second signal wiring 230, and the second input terminals Pwr of all driving circuits 110 in the second light-emitting unit group FGZ-2 are electrically connected to the corresponding second signal wiring 230. In this way, the number of second signal lines in the light-emitting substrate 10 can be M / 2.

[0107] In some examples, when implementing, Figure 1 and Figure 7 As shown, one light-emitting unit group includes two columns of light-emitting units 100; and in the same light-emitting unit group, the first connecting wire 310 for coupling the driving circuit 110 is arranged around the second signal wiring 230. In this way, most of the first connecting wires 310 and the second signal wiring 230 can be extended in the same direction, and the wiring space can be reasonably designed to reduce signal interference.

[0108] In some examples, when implementing, Figure 1 and Figure 7 As shown, the light-emitting substrate may further include: a common voltage signal line 250 electrically connected to the common voltage terminal GND, and a drive signal line 240 electrically connected to the drive voltage terminal Vled; wherein the common voltage signal line 250 and the drive signal line 240 both extend along the first direction F1. In this way, the drive voltage can be transmitted to the drive circuit 110 through the drive signal line 240, and the common voltage can be transmitted to the drive circuit 110 through the common voltage signal line 250. In addition, in this way, the extension directions of the common voltage signal line 250, the drive signal line 240, the first signal line 210, the second signal line 230, and most of the first connecting lines 310 can be consistent, and the wiring space can be reasonably designed to reduce signal interference.

[0109] In some examples, when implementing, Figure 1 and Figure 7 As shown, a column of light-emitting units 100 corresponds to a common voltage signal line 250 and a driving signal line 240. That is, the common voltage terminals GND of the driving circuits 110 in a column of light-emitting units 100 are all electrically connected to the same common voltage signal line 250, and the driving voltage terminals Vled in a column of light-emitting units 100 are all electrically connected to the same driving signal line 240.

[0110] In some examples, when implementing, Figure 1 and Figure 7 As shown, for the common voltage signal line 250, the drive signal line 240 and the second signal line corresponding to a column of light-emitting units 100, the common voltage signal line 250 is located between the drive signal line 240 and the second signal line. Exemplarily, the width of the common voltage signal line 250 in the second direction F2 is greater than the width of the drive signal line 240 in the second direction F2. The width of the drive signal line 240 in the second direction F2 is greater than the width of the second signal line in the second direction F2. The width of the second signal line in the second direction F2 is greater than the width of the first signal line in the second direction F2. The width of the first signal line in the second direction F2 is substantially equal to the width of the first connection line in the second direction F2.

[0111] In some examples, when implementing, Figure 1 and Figure 7 As shown, a light-emitting unit group may include two columns of light-emitting units 100; and the orthographic projections of two driving signal lines (e.g., 240 and 240') corresponding to the same light-emitting unit group on the substrate substrate 01 are symmetrically arranged with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01. For example, in the first light-emitting unit group FGZ-1, the orthographic projections of the two driving signal lines (e.g., 240 and 240') on the substrate substrate 01 are symmetrically arranged with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01. In the second light-emitting unit group FGZ-2, the orthographic projections of the two driving signal lines (e.g., 240 and 240') on the substrate substrate 01 are axially symmetrically arranged with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01.

[0112] In some examples, when implementing, Figure 1 and Figure 7As shown, a light-emitting unit group includes two columns of light-emitting units 100; and the orthographic projections of two common voltage signal lines (such as 250 and 250') corresponding to the same light-emitting unit group on the substrate substrate 01 are arranged axially symmetrically with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01. For example, in the first light-emitting unit group FGZ-1, the orthographic projections of the two common voltage signal lines (such as 250 and 250') on the substrate substrate 01 are arranged axially symmetrically with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01. In the second light-emitting unit group FGZ-2, the orthographic projections of the two common voltage signal lines (such as 250 and 250') on the substrate substrate 01 are arranged axially symmetrically with respect to the orthographic projections of the second signal line 230 on the substrate substrate 01. This can facilitate the composition and reduce the difficulty of design.

[0113] In some examples, when implementing, Figure 7 As shown, the first signal wiring 210, the second signal wiring 230, the common voltage signal wiring 250 and the driving signal wiring 240 can be located in the same layer. In this way, the patterns of the first signal wiring 210, the second signal wiring 230, the common voltage signal wiring 250 and the driving signal wiring 240 can be formed by the same patterning process, that is, the patterns of the first signal wiring 210, the second signal wiring 230, the common voltage signal wiring 250 and the driving signal wiring 240 are formed at one time by the patterning process after one film forming process, thereby reducing the process difficulty.

[0114] In some examples, when implementing, Figure 8a As shown, the first connection line 310 and the first signal wiring 210 can be located in the same layer. In this way, the patterns of the first connection line 310 and the first signal wiring 210 can be formed by the same patterning process, that is, the patterns of the first connection line 310 and the first signal wiring 210 are formed at one time by the patterning process after one film forming process, thereby reducing the process difficulty.

[0115] In some examples, when implementing, Figure 8a As shown, the output wiring 220 and the first signal wiring 210 can be located in the same layer. In this way, the patterns of the output wiring 220 and the first signal wiring 210 can be formed at one time through a patterning process after a film forming process, thereby reducing the process difficulty.

[0116] Exemplarily, the material of the layer where the first signal wiring is located may be a metal material, for example, any one of copper, molybdenum, titanium, aluminum, and nickel, or an alloy of at least two of them.

[0117] In some examples, when implementing, Figure 7 and Figure 8aAs shown, the light-emitting substrate further includes a first insulating layer located at a side of the layer where the first signal wiring 210 is located away from the base substrate 01, a plurality of second connecting wires 320 and a plurality of third connecting wires 330 located at a side of the first insulating layer away from the base substrate 01, and a second insulating layer located at a side of the second connecting wire 320 away from the base substrate 01, and a driving circuit 110 and a light-emitting element 120 located at a side of the second insulating layer away from the base substrate 01. Among them, a first input terminal Di of a driving circuit 110 corresponds to a second connecting wire 320, and an output terminal OT of a driving circuit 110 corresponds to a third connecting wire 330. Exemplarily, the first input terminal Di of the driving circuit 110 of the light-emitting unit 100 numbered 1 can be electrically connected to the corresponding second connecting wire 320 through a first input via GKD penetrating the second insulating layer, and the second connecting wire 320 is electrically connected to the corresponding first signal wiring 210 through a first via GK1 penetrating the first insulating layer. The output terminal OT of the driving circuit 110 of the light-emitting unit 100 labeled P can be electrically connected to the corresponding third connection line 330 through the output via GKO penetrating the second insulating layer, and the third connection line 330 is electrically connected to the corresponding first connection line 310 through the third via GK3 penetrating the first insulating layer. The first input terminal Di of the driving circuit 110 of the light-emitting unit 100 labeled P+1 can be electrically connected to the corresponding second connection line 320 through the first input via GKD penetrating the second insulating layer, and the second connection line 320 is electrically connected to the corresponding first connection line 310 through the fifth via GK5 penetrating the first insulating layer. The output terminal OT of the driving circuit 110 of the light-emitting unit 100 labeled N*Y can be electrically connected to the corresponding third connection line 330 through the output via GKO penetrating the second insulating layer, and the third connection line 330 is electrically connected to the corresponding output wiring 220 through the seventh via GK7 penetrating the first insulating layer.

[0118] Exemplarily, the material of the layer where the second connecting line is located may be a metal material, for example, any one of copper, molybdenum, titanium, aluminum, and nickel, or an alloy of at least two of them.

[0119] In some examples, when implementing, Figure 7As shown, the light-emitting substrate further includes a plurality of fourth connection lines 340 and a plurality of fifth connection lines 350 arranged in the same layer as the second connection line 320. Among them, the second input terminal Pwr of a driving circuit 110 corresponds to a fourth connection line 340, and the common voltage terminal GND of a driving circuit 110 corresponds to a fifth connection line 350. The second input terminal Pwr of the driving circuit 110 in each light-emitting unit 100 can be electrically connected to the corresponding fourth connection line 340 through the second input via GKP penetrating the second insulating layer, and the fourth connection line 340 can be electrically connected to the corresponding second signal wiring 230 through the ninth via penetrating the first insulating layer. The common voltage terminal GND of the driving circuit 110 in each light-emitting unit 100 can be electrically connected to the corresponding fifth connection line 350 through the common voltage via GKG penetrating the second insulating layer, and the fifth connection line 350 can be electrically connected to the corresponding common voltage signal wiring 250 through the eleventh via penetrating the first insulating layer.

[0120] In some examples, when implementing, Figure 7 As shown, the light-emitting substrate further includes a plurality of sixth connection wires 360 disposed in the same layer as the second connection wires 320. Among them, the driving voltage terminal Vled of one light-emitting unit 100 corresponds to one sixth connection wire 360. One end of the sixth connection wire 360 ​​in each light-emitting unit 100 is electrically connected to the corresponding driving signal wiring 240 through a driving via GKV penetrating the first insulating layer, and the other end of the sixth connection wire 360 ​​in each light-emitting unit 100 is electrically connected to the positive electrode or negative electrode of the corresponding light-emitting element 120 through a light-emitting via GKY penetrating the second insulating layer.

[0121] In some examples, when implementing, Figure 7 As shown, the light-emitting substrate may further include a plurality of seventh connection lines 370 disposed in the same layer as the second connection lines 320. One light-emitting group corresponds to a plurality of seventh connection lines 370, and the light elements in the light-emitting group may be sequentially connected in series through the seventh connection lines 370. In addition, the seventh connection line 370 is also electrically connected to the positive electrode or negative electrode of the corresponding light-emitting element 120 through the light-emitting via GKY penetrating the second insulating layer.

[0122] In some examples, when implementing, Figure 7As shown, the light-emitting substrate may further include a plurality of first auxiliary lines 510 disposed in the same layer as the second connecting line 320. The first auxiliary lines 510 extend along the second direction F2 and are arranged along the first direction F1. Moreover, the orthographic projection of the first auxiliary line 510 on the base substrate 01 is located between the orthographic projections of two adjacent rows of light-emitting units 100 on the base substrate 01. Each first auxiliary line 510 is electrically connected to each driving signal wiring 240 through a first auxiliary via 511 penetrating the first insulating layer. In this way, a parallel structure can be formed by the first auxiliary line 510 and the driving signal wiring 240, thereby reducing the resistance of the driving signal wiring 240, reducing the influence of the voltage drop on the light emission, and improving the light emission uniformity.

[0123] In some examples, when implementing, Figure 7 As shown, the light-emitting substrate may further include a plurality of second auxiliary lines 520 disposed in the same layer as the second connecting line 320. The second auxiliary lines 520 extend along the second direction F2 and are arranged along the first direction F1. Moreover, the orthographic projection of the second auxiliary line 520 on the base substrate 01 is located between the orthographic projections of two adjacent rows of light-emitting units 100 on the base substrate 01. Each second auxiliary line 520 is electrically connected to each common voltage signal line 250 through a second auxiliary via 521 penetrating the first insulating layer. In this way, a parallel structure can be formed by the second auxiliary line 520 and the common voltage signal line 250, thereby reducing the resistance of the common voltage signal line 250, reducing the influence of the voltage drop on the light emission, and improving the light emission uniformity.

[0124] In some examples, when implementing, Figure 7 As shown, the first auxiliary line 510 and the second auxiliary line 520 can be arranged alternately along the first direction F1. Exemplarily, the orthographic projection of the first auxiliary line 510 on the substrate substrate 01 is located between the orthographic projections of the light-emitting elements in two adjacent rows of light-emitting units 100 on the substrate substrate 01. The orthographic projection of the second auxiliary line 520 on the substrate substrate 01 is located between the orthographic projections of the light-emitting elements in two adjacent rows of light-emitting units 100 on the substrate substrate 01. Exemplarily, the orthographic projection of the first auxiliary line 510 on the substrate substrate 01 is located between the orthographic projections of the driving circuits in two adjacent rows of light-emitting units 100 on the substrate substrate 01. The orthographic projection of the second auxiliary line 520 on the substrate substrate 01 is located between the orthographic projections of the driving circuits in two adjacent rows of light-emitting units 100 on the substrate substrate 01.

[0125] Or, in some examples, in specific implementations, such as Figure 8b As shown, the first connection line 310 can be located on the side of the first signal line 210 away from the substrate 01. In this way, the first connection line 310 and the first signal line 210 can be arranged in different layers, thereby reducing signal interference caused by dense lines on the same layer.

[0126] Alternatively, in some examples, in specific implementation, the output line 220 can be located on the side of the first signal line 210 away from the substrate 01. In this way, the output line 220 and the first signal line 210 can be arranged on different layers, thereby reducing signal interference caused by dense lines on the same layer.

[0127] It should be noted that Figure 7 The top view of the light-emitting substrate is shown only with a driving circuit 110 but without a light-emitting element. Figure 7 , only the driving circuit 110 bound and connected to the corresponding pad is illustrated in the light-emitting unit at the coordinate (1,1), and the driving circuit is not illustrated in other light-emitting units, but only the pad to be bound to the driving circuit is illustrated. It can be understood that the pad to be bound to the driving circuit is the area exposed by the multiple output vias GKO, GKP, GKD, and GKG that penetrate the second insulating layer.

[0128] That is to say, in the remaining positions where the driving circuit needs to be bound, only the exposed pad areas to be bound to the driving circuit are indicated, and the subsequent driving circuit will be connected to these pads to complete the binding; similarly, only the exposed pad areas to be bound to the light-emitting element are indicated, and the subsequent light-emitting element will be connected to these pads to complete the binding. It can be understood that the pads to be bound to the light-emitting element are the areas exposed by the multiple output vias GKY that penetrate the second insulating layer.

[0129] Exemplarily, during the preparation process, the pads for binding the driving circuit and the pads for binding the light-emitting element need to be exposed, and in order to ensure good electrical connection and transmission, the pads are usually made of metal materials. In order to improve the problem of oxidation of metal materials, an anti-oxidation layer covering the pads can be provided on the pads. Exemplarily, the material of the anti-oxidation layer can be, for example, a copper-nickel alloy, or nickel metal, or indium tin oxide, etc. In this way, by providing an anti-oxidation layer at least in the pad area, the problem of oxidation of the pads can be improved.

[0130] In some examples, when implementing, Figure 1 and Fig. 9 As shown, the light-emitting substrate may further include a bonding area FB; the bonding area FB may include a plurality of signal terminals spaced apart from each other. Exemplarily, the plurality of signal terminals may include: a plurality of first signal terminals. Among them, a first signal line may be electrically connected to at least one first signal terminal. For example, a first signal line 210 may be electrically connected to a first signal terminal 610, or a first signal line 210 may be electrically connected to at least two first signal terminals. Of course, in actual applications, the number of first signal terminals connected by the first signal line may be designed and determined according to the needs of the actual application, and is not limited here.

[0131] In some examples, when implementing, Figure 1 and Fig. 9 As shown, the plurality of signal terminals may include: a plurality of output signal terminals. Among them, one output line is electrically connected to at least one output signal terminal. For example, one output line 220 may be electrically connected to one output signal terminal 620, or one output line may be electrically connected to at least two output signal terminals. Of course, in actual applications, the number of output signal terminals connected to the output line 220 may be designed and determined according to the requirements of the actual application, and is not limited here.

[0132] In some examples, when implementing, Figure 1 and Fig. 9 As shown, the plurality of signal terminals may include: a plurality of second signal terminals. Among them, a second signal line may be electrically connected to at least one second signal terminal. For example, a second signal line 230 may be electrically connected to a second signal terminal 630, or a second signal line 230 may be electrically connected to at least two second signal terminals. Of course, in actual applications, the number of second signal terminals connected to the second signal line 230 may be designed and determined according to the requirements of the actual application, and is not limited here.

[0133] Similarly, in some examples, such as Figure 1 and Fig. 9 As shown, the plurality of signal terminals may include: a plurality of drive signal terminals and a plurality of common voltage signal terminals, wherein a drive signal line 240 is electrically connected to at least one drive signal terminal; and a common voltage signal line 250 is electrically connected to at least one common voltage signal terminal.

[0134] In some examples, when implementing, Figure 1 , Figure 7 as well as Fig. 9As shown, the driving signal terminals, common voltage signal terminals, first signal terminals, second signal terminals and output signal terminals connected to the two driving signal lines 240, two common voltage signal lines 250, first signal line 210, second signal line 230 and output line 220 corresponding to a light-emitting unit group can be regarded as a terminal unit group, that is, one light-emitting unit group corresponds to one terminal unit group. Moreover, in one terminal unit group, the driving signal terminal, common voltage signal terminal, first signal terminal, second signal terminal, output signal terminal, common voltage signal terminal and driving signal terminal can be arranged in sequence according to the arrangement order of the driving signal lines 240, common voltage signal lines 250, first signal lines 210, second signal lines 230, output lines 220, common voltage signal lines 250 and driving signal lines 240 in the corresponding light-emitting unit group in the second direction F2. For example, in the first light-emitting unit group FGZ-1, the drive signal line 240, the common voltage signal line 250, the first signal line 210, the second signal line 230, the output line 220, the common voltage signal line 250, and the drive signal line 240 are arranged in sequence along the second direction F2, then the drive signal terminal, the common voltage signal terminal, the first signal terminal, the second signal terminal, the output signal terminal, the common voltage signal terminal, and the drive signal terminal corresponding to the first light-emitting unit group FGZ-1 are also arranged in sequence along the second direction F2.

[0135] In some examples, when implementing, Figure 1 , Figure 7 as well as Fig. 9 As shown, one light emitting unit group can correspond to one terminal unit group, and when multiple groups of light emitting units are repeatedly and spaced apart along the second direction, the corresponding terminal unit groups can also be repeatedly and spaced apart along the second direction.

[0136] In some examples, when implementing, Figure 1 , Figure 7 as well as Fig.10 As shown, the plurality of signal terminals further include a dummy signal terminal; wherein, for the first signal terminal and the common voltage signal terminal corresponding to the same light-emitting unit group, a dummy signal terminal is provided between the first signal terminal and the common voltage signal terminal. By providing the dummy signal terminal, not only can the signal terminals provided in the fan-out area be uniformly distributed, but also the risk of signal interference between the first signal terminal and the common voltage signal terminal can be reduced.

[0137] In some examples, when implementing, Figure 1 , Figure 7 as well as Fig.10As shown, for the output signal terminal and the common voltage signal terminal corresponding to the same light-emitting unit group, a dummy signal terminal is provided between the output signal terminal and the common voltage signal terminal.

[0138] In some examples, during implementation, the orthographic projection of the second signal line 230 in the first direction F1 overlaps with the orthographic projections of the two signal terminals in the first direction F1. For example, for the two signal terminals that overlap with the orthographic projection of the second signal line 230 in the first direction F1, both signal terminals are second signal terminals. Figure 1 , Figure 7 as well as Fig.10 As shown, one second signal line 230 can be electrically connected to two second signal terminals. Thus, the second input signal is input to one second signal line 230 through the two second signal terminals, thereby ensuring that one second signal line 230 can provide the second input signal to two adjacent columns of light-emitting units 100.

[0139] In some examples, during implementation, for two signal terminals overlapping with the orthographic projection of the second signal trace 230 in the first direction F1, one of the two signal terminals may be the second signal terminal and the other may be a dummy signal terminal.

[0140] In some examples, in a specific implementation, the light-emitting substrate may further include a flexible printed circuit board (FPC). The flexible printed circuit board may be electrically connected to the above-mentioned first signal terminal, output signal terminal, second signal terminal, drive signal terminal and common voltage signal terminal by bonding. In addition, the flexible printed circuit board is also used to bind with other components, such as a light-emitting control circuit. The light-emitting control circuit may provide a plurality of first input signals and a plurality of second input signals, which are transmitted to each first signal line 210 and second signal line 230 through the flexible printed circuit board, and further transmitted to each group of light-emitting units 100 to control the light-emitting substrate 10 to emit light. In addition, the light-emitting control circuit may also provide a driving voltage and a common voltage, which may be transmitted to the driving signal line 240 and the common voltage signal line 250 through the driving signal terminal and the common voltage signal terminal, respectively.

[0141] In some examples, a mass transfer method and processes such as reflow soldering can be used to electrically connect the light-emitting element to the light-emitting substrate.

[0142] In some examples, a mass transfer method and processes such as reflow soldering may also be used to electrically connect the driving circuit to the light-emitting substrate.

[0143] At least one embodiment of the present disclosure further provides a display device, which includes a display panel and a light-emitting substrate provided by any embodiment of the present disclosure. The display device can realize independent control of light-emitting brightness in different regions, has low power consumption, high integration, simple control method, and can cooperate with a liquid crystal display device to realize high-contrast display.

[0144] In some examples, when implementing, Fig.11 As shown, in some embodiments, the display device 20 includes a display panel 210 and a light-emitting substrate 220. For example, the light-emitting substrate 220 can be a light-emitting substrate provided by any embodiment of the present disclosure, such as the light-emitting substrate 10 described above.

[0145] For example, the display panel 210 has a display side P1 and a non-display side P2 opposite to the display side P1, and the light-emitting substrate 220 is disposed on the non-display side P2 of the display panel 210 to serve as a backlight unit. For example, the light-emitting substrate 220 can serve as a surface light source to provide backlight to the display panel 210. For example, the display panel 210 can be an LCD panel, an electronic paper display panel, etc., which is not limited in the embodiments of the present disclosure.

[0146] For example, the display device 20 may be an LCD device, an electronic paper display device, or other devices with display functions, and the embodiments of the present disclosure do not limit this. For example, the display device 20 may be any product or component with display functions, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, an electronic book, and the like, and the embodiments of the present disclosure do not limit this.

[0147] It should be noted that the light-emitting substrate 10 provided in the embodiment of the present disclosure can be applied as a backlight unit in the above-mentioned display device 20, or can be used alone as a substrate with display function or light-emitting function, and the embodiment of the present disclosure does not limit this.

[0148] The detailed description and technical effects of the display device 20 can refer to the above description of the light-emitting substrate 10, which will not be repeated here. The display device 20 can also include more components and structures, which can be determined according to actual needs, and the embodiments of the present disclosure are not limited to this.

[0149] At least one embodiment of the present disclosure provides a light-emitting substrate and a display device. The light-emitting substrate can realize the independent control of the light-emitting brightness in different regions, has low power consumption, high integration, simple control method, and can cooperate with a liquid crystal display device to realize high-contrast display. In addition, the light-emitting substrate can reduce signal interference and improve display effect.

[0150] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0151] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A light-emitting substrate, wherein: Comprising: A substrate, including a plurality of light-emitting units arranged in an array; wherein, each of the light-emitting units includes a driving circuit and a light-emitting group coupled to the driving circuit, and the light-emitting group includes a plurality of light-emitting elements; A first signal trace, located on the substrate and extending in a first direction; Wherein, the driving circuits in at least two different light-emitting units along the first direction are coupled to each other, and the driving circuit includes a first input terminal, and the first signal trace is coupled to the first input terminal of one of the at least two coupled driving circuits; The plurality of light-emitting units are arranged in N rows and M columns and divided into multiple groups, each group of light-emitting units includes N rows and Y columns, a total of N*Y light-emitting units, and one first signal trace corresponds to one group of light-emitting units; In the same group of light-emitting units, the N*Y light-emitting units are sequentially numbered according to their row and column distribution positions. The first input terminal of the driving circuit of the light-emitting unit numbered 1 is electrically connected to the first signal trace corresponding to this group of light-emitting units. The output terminal of the driving circuit of the light-emitting unit numbered P is electrically connected to the first input terminal of the driving circuit of the light-emitting unit numbered P+1 through the first connection line; The light-emitting substrate further includes an output trace; the output trace extends along the first direction, and the output terminal of the driving circuit of the light-emitting unit numbered N*Y is electrically connected to the output trace; N is an integer greater than 0, M is an integer greater than 0, 0 < Y ≤ M and Y is an integer, 0 < P < N*Y and P is an integer.

2. The light-emitting substrate according to claim 1, wherein: In the same group of light-emitting units, the light-emitting unit numbered 1 and the light-emitting unit numbered N*Y are adjacent to each other in a second direction, and the output terminal of the driving circuit of the light-emitting unit numbered N*Y / 2 and the driving circuit of the light-emitting unit numbered N*Y / 2+1 are adjacent to each other in the second direction.

3. The light-emitting substrate according to claim 1, wherein: At least one of the first connection line and the output trace is located on a side of the first signal trace away from the substrate; or, At least one of the first connection line and the output trace is on the same layer as the first signal trace.

4. The light-emitting substrate according to any one of claims 1 to 3, wherein: The driving circuit further includes a second input terminal; the light-emitting substrate further includes a second signal trace; The second signal trace is electrically connected to the second input terminal of the driving circuit.

5. The light-emitting substrate according to claim 4, wherein: The second signal trace extends along the first direction.

6. The light-emitting substrate according to claim 5, wherein: The second input terminals of all the driving circuits in one group of light-emitting units are electrically connected to the same second signal trace.

7. The light-emitting substrate according to claim 6, wherein: One group of light-emitting units includes two columns of light-emitting units; In the same group of light-emitting units, the first connection line for coupling the driving circuits is arranged around the second signal trace.

8. The light-emitting substrate according to any one of claims 1 to 3, wherein: The driving circuit further includes a common voltage terminal; the light-emitting group is electrically connected between the driving voltage terminal and the output terminal of the driving circuit; The light-emitting substrate further includes: a common voltage signal trace electrically connected to the common voltage terminal, and a driving signal trace electrically connected to the driving voltage terminal; wherein, both the common voltage signal trace and the driving signal trace extend along the first direction.

9. The light-emitting substrate according to claim 8, wherein: One column of light-emitting units corresponds to one common voltage signal trace and one driving signal trace.

10. The light emitting substrate according to claim 9, wherein: For the common voltage signal wiring, the driving signal wiring and the second signal wiring corresponding to a column of light-emitting units, the common voltage signal wiring is located between the driving signal wiring and the second signal wiring.

11. The light emitting substrate according to claim 10, wherein: A light emitting unit group includes two columns of light emitting units; The orthographic projections of the two driving signal lines corresponding to the same light-emitting unit group on the base substrate are arranged axially symmetrically with respect to the orthographic projection of the second signal line on the base substrate.

12. The light emitting substrate according to claim 10, wherein: A light emitting unit group includes two columns of light emitting units; The orthographic projections of the two common voltage signal wires corresponding to the same light-emitting unit group on the base substrate are arranged axially symmetrically with respect to the orthographic projection of the second signal wire on the base substrate.

13. A display device, wherein: It comprises the light-emitting substrate as described in any one of claims 1 to 12.

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