Light-emitting substrate and backlight module

Abstract

The application discloses a light-emitting substrate and a backlight module. The light-emitting substrate comprises a substrate, a plurality of light-emitting units arranged on the substrate, one light-emitting unit comprising at least one light-emitting element, a plurality of control chips arranged on the substrate, one control chip being connected to at least two light-emitting units, wherein one control chip and the light-emitting units connected to the control chip form a control group, the light-emitting units connected to the same control chip are arranged in sequence along a first direction, the control groups are arranged in an array along the first direction and a second direction, the first direction and the second direction are perpendicular to each other, the light-emitting substrate further comprises a plurality of signal lines, at least part of the signal lines are arranged into a plurality of signal line groups along the first direction, and each control group arranged in a column along the second direction is connected to a signal line group. The application can control a plurality of light-emitting units by one column of control chips, and the number of signal lines in the light-emitting substrate can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a light-emitting substrate and a backlight module. BACKGROUND

[0002] In a sub-millimeter light-emitting diode (Mini Light-Emitting Diode, Mini LED for short) backlight product, a Mini LED chip or a Mini LED packaging device is used as a light-emitting element, at least one light-emitting element constitutes a light-emitting unit, and an active matrix (Active Matrix, AM for short) driving mode can be used to control the light-emitting unit in the Mini LED backlight individually, so as to realize fine local dimming.

[0003] At present, in the driving circuit of the Mini LED backlight product, one control chip corresponds to one light-emitting unit, a group of signal lines including a plurality of signal lines are connected between the control chip and the light-emitting unit, however, with the pursuit of higher brightness and higher contrast of the display product, the number of partitions of the backlight in the Mini LED product increases, which will make the number of signal lines in the driving circuit large, and further cause the problems of large fan-out area of the display device and high manufacturing cost. SUMMARY

[0004] The present application provides a light-emitting substrate and a backlight module, which has fewer signal lines in the driving circuit.

[0005] In one aspect, the present application provides a light-emitting substrate, comprising: a substrate substrate;

[0006] a plurality of light-emitting units arranged in an array on the substrate substrate; one light-emitting unit includes at least one light-emitting element;

[0007] a plurality of control chips arranged in an array on the substrate substrate; one control chip is connected to at least two light-emitting units;

[0008] Wherein, one control chip and each light-emitting unit connected to the control chip constitute a control group, and each light-emitting unit connected to the same control chip is arranged in a first direction in turn;

[0009] A plurality of control groups are arranged in an array along the first direction and the second direction; the first direction and the second direction intersect;

[0010] The light-emitting substrate further comprises: a plurality of signal lines; at least part of the signal lines is arranged in a plurality of signal line groups along the first direction; each control group arranged in a column along the second direction is connected to a signal line group.

[0011] In some embodiments of the present application, the plurality of signal lines comprises a plurality of fixed potential signal lines; any fixed potential signal line of the plurality of fixed potential signal lines comprises a plurality of first parts extending along the first direction and spaced along the second direction, and a second part extending along the second direction, one end of each of the first parts being connected to the second part; a control group is arranged between any two adjacent first parts in the second direction, and each of the light emitting units in one control group is connected to one first part;

[0012] Each of the light emitting units in the control group comprises a first end and a second end, the first end of each of the light emitting units is connected to the corresponding first part, and the second end of each of the light emitting units is connected to the corresponding control chip.

[0013] In some embodiments of the present application, the control groups arranged in a column along the second direction are a control group column, and one control group column is connected to one fixed potential signal line;

[0014] Each of two adjacent control group columns is a control unit, and the two second parts of the two fixed potential signal lines connected by the control unit are located on the two sides of the control unit, and the first parts of the two fixed potential signal lines are arranged in axial symmetry.

[0015] In some embodiments of the present application, the plurality of signal lines further comprises a plurality of common potential signal lines; the plurality of common potential signal lines extend along the second direction and are arranged along the first direction; one control unit is connected to one common potential signal line;

[0016] In one control unit, the common potential signal line is located between the two fixed potential signal lines; the light emitting units and the control chips in the two control group columns are arranged in axial symmetry with respect to the common potential signal line; and the control chips in the two control group columns are located on the two sides of the common potential signal line and connected to the common potential signal line.

[0017] In some embodiments of the present application, two adjacent control units share the second part of one fixed potential signal line.

[0018] In some embodiments of the present application, the two control group columns in one control unit share one signal line group, and the control chips in the control unit are connected to each other through the signal line group; the signal line group comprises a power signal line, an addressing signal line and a data signal line.

[0019] In some embodiments of the present application, the signal line group further comprises a feedback signal line;

[0020] One of the control chips at one end of each of the control chips connected to each other in one of the control units is connected to the data signal line, and the control chip at the other end is connected to the feedback signal line.

[0021] In some embodiments of the present application, each of the control groups arranged in a column along the second direction is a control group column, and one control group column is connected to one fixed potential signal line.

[0022] The plurality of signal lines further comprises a plurality of common potential signal lines; the plurality of common potential signal lines extend along the second direction and are arranged along the first direction; one control group column is connected to one common potential signal line.

[0023] In some embodiments of the present application, the second part of the common potential signal line and the fixed potential signal line is arranged at intervals in the first direction, and each first part of the fixed potential signal line is located between the second part and the common potential signal line; each of the control chips in the control group column is arranged adjacent to and connected to the common potential signal line.

[0024] In some embodiments of the present application, one control group column is connected to one signal line group, and each of the control chips in the control group column is connected to each other through the signal line group; the signal line group comprises a power supply signal line, an addressing signal line and a data signal line.

[0025] In some embodiments of the present application, the signal line group further comprises a feedback signal line, and the feedback signal line is arranged adjacent to the common potential signal line; one of the control chips at one end of each of the control chips connected to each other in one control group column is connected to the data signal line, and the control chip at the other end is connected to the feedback signal line.

[0026] In some embodiments of the present application, the power supply signal line comprises a plurality of power supply signal line segments, and each of the control chips corresponding to the power supply signal line is connected in sequence through the power supply signal line segment;

[0027] The addressing signal line comprises a plurality of addressing signal line segments, and each of the control chips corresponding to the addressing signal line is connected in sequence through the addressing signal line segment;

[0028] The data signal line comprises a plurality of data signal line segments, and each of the control chips corresponding to the data signal line is connected in sequence through the data signal line segment.

[0029] In some embodiments of the present application, a binding area is further included, which is located at one side edge of the substrate along the second direction; the binding area comprises a plurality of binding pins.

[0030] The second part of each of the fixed potential signal lines, each of the common potential signal lines, each of the power supply signal lines, each of the addressing signal lines, each of the data signal lines, and each of the feedback signal lines is connected to at least one of the binding pins.

[0031] In some embodiments of the present application, the light emitting element is an inorganic light emitting diode.

[0032] In another aspect of the present application, a backlight module is provided, which comprises a back plate and at least one light emitting substrate as described above on the back plate.

[0033] The present application has the following advantages:

[0034] The present application provides a light emitting substrate and a backlight module. The light emitting substrate comprises: a substrate; a plurality of light emitting units arranged in an array on the substrate; one light emitting unit comprises at least one light emitting element; a plurality of control chips arranged in an array on the substrate; one control chip is connected to at least two light emitting units; wherein one control chip and each light emitting unit connected to the control chip form a control group, and each light emitting unit connected to the same control chip is arranged in sequence along a first direction; a plurality of control groups are arranged in an array along the first direction and a second direction; the first direction and the second direction are perpendicular to each other; the light emitting substrate further comprises: a plurality of signal lines; at least part of the plurality of signal lines are arranged into a plurality of signal line groups along the first direction; each control group arranged in a column along the second direction is connected to a signal line group. Since each light emitting unit connected to the same control chip is arranged along the row direction, a column of control chips can control a plurality of columns of light emitting units, and the number of signal line groups is related to the number of columns of control chips, so that by reducing the number of columns of control chips, the number of signal line groups can be reduced, i.e. the number of signal lines in the light emitting substrate can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings introduced below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0036] Figure 1 FIG. 1 is a structural schematic diagram of a light emitting substrate in the related art;

[0037] Figure 2 FIG. 4 is a structural schematic diagram of a control group provided in an embodiment of the present application;

[0038] Figure 3 FIG. 6 is a partial structural schematic diagram of a light emitting substrate provided in an embodiment of the present application;

[0039] Figure 4 Fig. 2 is a partial structure schematic diagram of a light-emitting substrate according to an embodiment of the present application;

[0040] Figure 5 Fig. 3 is a partial structure schematic diagram of a light-emitting substrate according to an embodiment of the present application;

[0041] Figure 6 Fig. 4 is a structure schematic diagram of a backlight module according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the above objectives, features and advantages of the present application more apparent, further description will be made to the present application with reference to the accompanying drawings and embodiments. However, the example embodiments can be implemented in various forms, and should not be understood as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided to make the present application more comprehensive and complete, and to fully convey the ideas of the example embodiments to those skilled in the art. The same reference signs in the drawings represent the same or similar structures, and thus repeated description thereof will be omitted. The expressions of position and direction described in the present application are described with reference to the drawings, but can be changed as needed, and the changes made are included in the protection scope of the present application. The drawings of the present application are only used to illustrate the relative positional relationship and do not represent the true proportions.

[0043] Figure 1 Fig. 1 is a structure schematic diagram of a light-emitting substrate according to the related art.

[0044] In the related art, Mini LED backlight products usually adopt AM driving to achieve fine control of backlight partitioning. In the light-emitting substrate, one column of control chips corresponds to control one column of light-emitting units, and one column of control chips corresponds to connect one group of signal lines, as shown in Figure 1 Fig. 1, in the light-emitting substrate, a plurality of light-emitting units 10 and a plurality of control chips 20 are arrayed on a substrate 100. One control chip 20 is connected to at least one light-emitting unit 10, and the plurality of control chips 20 are arranged into a plurality of columns along a second direction Y, and the light-emitting units 10 connected by the control chips 20 are also arranged into a plurality of columns along the second direction Y, that is, one column of control chips corresponds to control one column of light-emitting units. One column of control chips and the corresponding one column of light-emitting units are connected to one signal line group L1. The signal line group L1 can include a plurality of signal lines, and each signal line in the signal line group L1 extends along the second direction Y. The signal line groups L1 are arranged along a first direction X, wherein the first direction X and the second direction Y intersect.

[0045] With the pursuit of higher brightness and contrast in display products, the increase in the number of Mini LED backlight zones, that is, the increase in the number of light-emitting unit columns, will lead to a large number of signal lines required in the driving circuit, which in turn leads to a large fan-out area of ​​the display device and high production costs. In view of this, the present invention provides a light-emitting substrate whose wiring method can significantly reduce the number of signal lines in the driving circuit.

[0046] Figure 2 A schematic diagram of the structure of a control group provided in an embodiment of the present invention.

[0047] In the embodiment of the present invention, the control chip and the light-emitting unit in the light-emitting substrate are divided into multiple control groups, such as Figure 2 As shown, a control chip 20 and the light-emitting units 10 connected to the control chip 20 form a control group 200 , and the light-emitting units 10 connected to the same control chip 20 are arranged in sequence along the first direction X.

[0048] Among them, one control chip 20 is connected to at least two light-emitting units 10. The embodiment of the present invention is illustrated by taking one control chip 20 connected to 8 light-emitting units 10 as an example. In specific implementation, the model of the control chip 20 and the number of light-emitting units 10 connected to each control chip 20 can be adjusted according to usage requirements and are not limited here.

[0049] A light-emitting unit 10 may include at least one light-emitting element. When a light-emitting unit 10 includes multiple light-emitting elements, the light-emitting elements are interconnected to form an electrical circuit, and then connected to the corresponding control chip 20. The light-emitting element can specifically be an inorganic light-emitting diode (LED). The type of inorganic light-emitting diode is not limited here. An LED with a quantum well junction, an LED with a columnar structure, an LED with a double heterojunction, etc. can be used. The LED can be a structure with a size of hundreds of microns. The area of ​​the light-emitting region of the LED is preferably 1mm 2 Below, more preferably 10000 μm 2 Below, more preferably 3000 μm 2 Below, more preferably 700 μm 2 Below, even 200μm 2 The following refers to Mini LED or MicroLED, etc.

[0050] Figure 3 This is one of the partial structural schematic diagrams of the light-emitting substrate provided by an embodiment of the present invention.

[0051] like Figure 3As shown, a plurality of light-emitting units 10 are arrayed on a base substrate 100, and a plurality of control chips 20 are arrayed on the base substrate 100. The base substrate 100 can be a printed circuit board (PCB) or a glass substrate. The plurality of control groups 200, consisting of the plurality of control chips and the plurality of light-emitting units, are arranged in an array along a first direction X and a second direction Y, with the first direction X and the second direction Y intersecting. The light-emitting base substrate also includes a plurality of signal lines. At least some of the plurality of signal lines are arranged along the first direction X to form a plurality of signal line groups L2. Each control group 200 arranged in a row along the second direction Y is connected to a corresponding signal line group L2.

[0052] Compared with the signal line arrangement method in the related art, in the embodiment of the present invention, one column of control chips can be connected to multiple columns of light-emitting units. Accordingly, the number of signal lines required to set up the same number of light-emitting units is also smaller, which is conducive to improving the density of light-emitting units in display products and achieving higher brightness and higher contrast display effects.

[0053] like Figure 3 As shown, the multiple signal lines include multiple fixed potential signal lines 31. The fixed potential signal lines 31 include multiple first portions 311 extending along a first direction X and spaced apart along a second direction Y, and a second portion 312 extending along the second direction Y. One end of each first portion 311 is connected to the second portion 312. Arranging each fixed potential signal line 31 in a comb-like shape facilitates connection to multiple light-emitting units 10 arranged sequentially along the first direction X. Specifically, a control group 200 is disposed between any two adjacent first portions 311 in the second direction Y. Each light-emitting unit 10 in a control group 200 is connected to a first portion 311. Each control group 200 arranged in a row along the second direction Y is referred to as a control group column K, and each control group column K is connected to a corresponding fixed potential signal line 31. Each light-emitting unit 10 in the control group 200 includes a first end and a second end. The first end of each light-emitting unit 10 is connected to the corresponding first portion 311, and the second end of each light-emitting unit 10 is connected to the corresponding control chip 20.

[0054] The plurality of fixed potential signal lines 31 may be arranged in different ways according to specific requirements. In some embodiments, two adjacent fixed potential signal lines 31 may be symmetrically arranged, such as Figure 3 As shown, every two adjacent control group columns K constitute a control unit Q. The two second portions 312 of the two fixed potential signal lines 31 connected to the control unit Q are located on both sides of the control unit Q, and the first portions 311 of the two fixed potential signal lines 31 are arranged axially symmetrically.

[0055] The light-emitting substrate further includes a plurality of common potential signal lines 35 extending along the second direction Y and arranged along the first direction X, as shown in Figure 3 As shown in FIG. 1, when the two adjacent fixed potential signal lines are arranged in axial symmetry, one control unit Q can be connected to only one common potential signal line 35. In one control unit Q, the common potential signal line 35 is located between the two fixed potential signal lines 31, and the light-emitting units 10 and the control chips 20 in the two control groups K are arranged in axial symmetry with respect to the common potential signal line 35. The control chips 20 in the two control groups K are respectively located on both sides of the common potential signal line 35 and connected to the common potential signal line 35, that is, the two control groups K can share the same common potential signal line.

[0056] In addition, the two control groups K in one control unit Q share one signal line group L2, and the signal line group L2 includes one power supply signal line 32, one addressing signal line 33, and one data signal line 34. The power supply signal line 32 includes a plurality of power supply signal line segments, and the control chips 20 corresponding to the power supply signal line 32 are connected in sequence through the power supply signal line segments. The addressing signal line 33 includes a plurality of addressing signal line segments, and the control chips 20 corresponding to the addressing signal line 33 are connected in sequence through the addressing signal line segments. The data signal line 34 includes a plurality of data signal line segments, and the control chips 20 corresponding to the data signal line 34 are connected in sequence through the data signal line segments.

[0057] Based on the above signal line arrangement, only two fixed potential signal lines 31, one power supply signal line 32, one addressing signal line 33, one data signal line 34, and one common potential signal line 35 are needed to drive 16 columns of light-emitting units through two control chips 20, which greatly reduces the number of signal lines compared with the signal line arrangement in the related art.

[0058] The specific driving mode is as follows: before starting work, the address signal line 33 assigns an address to each control chip 20, and the control chip 20 can read the corresponding driving control signal according to the address; the power signal line 32 can transmit a direct current power signal to supply power to the control chip 20; the data signal line 34 can transmit a plurality of address prefixes and driving control signals corresponding to the address prefixes one by one, and the control chip 20 can select the driving control signal matched with the address assigned by the address signal line 33 for processing, the driving control signal includes an initial signal for controlling the light emitting unit 10 by the control chip 20, and the initial signal is processed into a duty cycle signal and a current amplitude signal required by the light emitting unit 10 by a modem module of the control chip 20; the fixed potential signal line 31 provides a fixed potential for the light emitting unit 10, and the common potential signal line 35 transmits a set potential signal for providing a constant potential; according to the signal processed by the control chip 20, the control chip 10 can control the on-off time of the light emitting unit 10 connected thereto and the current flowing through the light emitting unit 10, thereby controlling the luminance of the light emitting unit 10.

[0059] Figure 4 A partial structure diagram of a light emitting substrate provided by the embodiment of the present application.

[0060] As shown in Figure 4 , the light emitting substrate includes a plurality of control groups, and two adjacent control units Q can share a second part 312 of a fixed potential signal line 31, so that the number of fixed potential signal lines in the light emitting substrate can be further reduced on the basis of the structure shown in Figure 3 , and the driving mode thereof is the same as that of the structure shown in Figure 3 , which will not be described herein.

[0061] Figure 5 A structure diagram of a light emitting substrate provided by the embodiment of the present application.

[0062] In some embodiments, the arrangement of each signal line is as shown in Figure 5 , each control group 200 arranged in a column along the second direction Y is a control group column K, one control group column K corresponds to one fixed potential signal line 31, and a plurality of common potential signal lines 35 extend along the second direction Y and are arranged along the first direction X, one control group column K corresponds to one common potential signal line 35.

[0063] The second part 312 of the common potential signal line 35 and the fixed potential signal line 31 is arranged in the first direction X, the first part 311 of the fixed potential signal line 31 is located between the second part 312 and the common potential signal line 35, and each control chip 20 in the control group column K is arranged adjacent to and connected to the common potential signal line 35.

[0064] And one control group column K corresponds to connecting one signal line group L2, one signal line group L2 includes a power signal line 32, an addressing signal line 33 and a data signal line 34. Among them, the power signal line 32 includes a plurality of power signal line segments, and the corresponding control chip 20 of the power signal line 32 is connected in turn through the power signal line segment; the addressing signal line 33 includes a plurality of addressing signal line segments, and the corresponding control chip 20 of the addressing signal line 33 is connected in turn through the addressing signal line segment; the data signal line 34 includes a plurality of data signal line segments, and the corresponding control chip 20 of the data signal line 34 is connected in turn through the data signal line segment.

[0065] Based on the above signal line arrangement, only one fixed potential signal line 31, one power signal line 32, one addressing signal line 33, one data signal line 34 and one common potential signal line 35 are needed to control one column of control chips to drive 8 columns of light emitting units. Compared with the signal line arrangement in the related art, the number of signal lines can be reduced.

[0066] In specific implementation, the number of light emitting units connected to one control chip can be adjusted as needed. According to the inventive concept of the present application, for the same number of light emitting units, the more the number of light emitting units arranged in the first direction connected to the control chip, the fewer the number of signal lines needed to be set. The present application only lists the above three signal line arrangement modes, and based on the same inventive concept, the wiring mode in the light emitting substrate can also be adjusted according to product use requirements, which is not limited here.

[0067] As shown in Figure 3 , Figure 4 and Figure 5 , the signal line group L2 can also include a feedback signal line 36. For the wiring mode of Figure 3 and Figure 4 , in one control unit Q, one end of the control chip 20 in each control chip 20 connected to each other connects the data signal line 34, and the other end of the control chip 20 connects the feedback signal line 36. For the wiring mode as shown in Figure 5 , one end of the control chip 20 in each control chip 20 connected to each other in one control group column K connects the data signal line 34, and the other end of the control chip 20 connects the feedback signal line 36.

[0068] Each signal line in the light emitting substrate needs to be connected to an external control element, and the control element transmits corresponding signals to each signal line. Among them, the signal transmitted in the data signal line 34 can be fed back to the control element through the feedback signal line 36, and the control element can calculate according to the received feedback signal, and then adjust the potential applied to the fixed potential signal line 31, so as to regulate the light emitting state of each light emitting unit and reduce the power consumption of the light emitting substrate.

[0069] In order to facilitate the control of the signals transmitted by the signal lines, the signal lines need to be collected to the edge of the light-emitting substrate, and therefore a binding area is further provided in the light-emitting substrate, the binding area is located at one side of the substrate 100 along the second direction Y, the binding area binds a chip on flex (COF), and the control element is connected through the COF, the binding area includes a plurality of binding pins, the second part 312 of each fixed signal line 31, each common potential signal line 35, each power signal line 32, each addressing signal line 33, each data signal line 34 and each feedback signal line 36 are respectively connected to at least one binding pin, so that the control element can transmit corresponding signals to each signal line.

[0070] In order to control the cost of the COF, the area of the binding area needs to be as small as possible, and therefore the signal lines far away from the binding area need to be routed transversely in the edge area to extend to the binding area, and therefore a certain width of area needs to be left near the frame of the substrate for placing the transverse signal lines, that is, a fan-out area. With the increase in the number of signal lines caused by the increase in the number of light-emitting unit columns in the light-emitting substrate, the area of the fan-out area also increases, and the frame of the display product is difficult to narrow. The light-emitting substrate provided by the embodiments of the present application greatly reduces the number of signal lines and also has the effect of reducing the area of the fan-out area of the light-emitting substrate, which is beneficial to the narrow-frame design of the display product.

[0071] Based on the same inventive concept, the embodiments of the present application also provide a backlight module, which comprises a back plate and a light-emitting substrate located above the back plate, and the light-emitting substrate can be any of the above light-emitting substrates.

[0072] Figure 6 A structural schematic diagram of the backlight module provided by the embodiments of the present application is shown.

[0073] As shown in Figure 6 , the backlight module can include a back plate 1, a light-emitting substrate 2, a support 3 and an optical film group 4.

[0074] The back plate 1 can be plate-shaped and can be made of aluminum, iron, aluminum alloy or iron alloy. The back plate 1 can also be box-shaped and include a bottom plate for supporting the light-emitting substrate 2 and a side plate for supporting the peripheral area of the optical film group 4.

[0075] The light-emitting substrate 2 is located above the back plate 1 and has a shape matching the back plate 1. The light-emitting substrate can be used as a backlight source. White oil can be coated on the light-emitting substrate 2 or a reflective sheet can be provided as a reflective layer. The reflective layer should include a plurality of openings for exposing the light-emitting elements to avoid blocking light. The reflective layer can be used to reflect the incident light to the light-emitting side of the light-emitting elements to improve the utilization rate of the light emitted by the light-emitting elements.

[0076] The plurality of supports 3 are evenly distributed between the light-emitting substrate 2 and the optical film set 4 and are fixed on the light-emitting substrate 2. The supports 3 can be used to support the optical film set 4 and also ensure a certain distance between the light-emitting substrate 2 and the optical film set 4, i.e., increase the light mixing distance of the light emitted by the light-emitting substrate 2.

[0077] The optical film set 4 is located on the light-emitting side of the light-emitting substrate 2 and can have the same shape as the back plate 1. The optical film set 4 includes a plurality of film layers for achieving different functions, such as a diffusion layer, a wavelength conversion layer, and optical films.

[0078] The backlight module provided by the embodiment of the present application is applied to display products and has the advantages of low cost and narrow frame.

[0079] Although the preferred embodiments of the present application have been described, those skilled in the art who understand the basic inventive concept can make additional changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0080] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, the present application also intends to include such modifications and changes within the scope of the present application.

Claims

1. A light-emitting substrate, characterized in that: include: substrate; A plurality of light emitting units are arranged in an array on the base substrate; One of the light-emitting units includes at least one light-emitting element; A plurality of control chips are arranged in an array on the substrate; One of the control chips is connected to at least two of the light-emitting units; Wherein, one control chip and the light-emitting units connected to the control chip form a control group, and the light-emitting units connected to the same control chip are arranged in sequence along the first direction; The plurality of control groups are arranged in an array along a first direction and a second direction; the first direction and the second direction intersect; The light-emitting substrate further comprises: a plurality of signal lines; at least some of the plurality of signal lines are arranged along the first direction to form a plurality of signal line groups; each of the control groups arranged in a row along the second direction is connected to a corresponding signal line group; The multiple signal lines include multiple fixed potential signal lines; the multiple fixed potential signal lines include: multiple first parts extending along the first direction and spaced apart along the second direction and a second part extending along the second direction, one end of each first part is connected to the second part; the control group is arranged between the first parts, and each of the light-emitting units in the control group is connected to the first part.

2. The light-emitting substrate according to claim 1, wherein Each of the light-emitting units in the control group includes a first end and a second end. The first end of each of the light-emitting units is connected to the corresponding first part, and the second end of each of the light-emitting units is connected to the corresponding control chip.

3. The light-emitting substrate according to claim 2, wherein The control groups arranged in a row along the second direction constitute a control group column, and one control group column is correspondingly connected to one fixed potential signal line; Every two adjacent control groups are arranged as a control unit; the two second portions of the two fixed potential signal lines connected to the control unit are located on both sides of the control unit, and the first portions of the two fixed potential signal lines are arranged axially symmetrically.

4. The light-emitting substrate according to claim 3, wherein The plurality of signal lines further include a plurality of common potential signal lines; the plurality of common potential signal lines extend along the second direction and are arranged along the first direction; one of the control units is correspondingly connected to one of the common potential signal lines; In one of the control units, the common potential signal line is located between the two fixed potential signal lines; the light-emitting units and the control chips in the two control group columns are axially symmetrically distributed relative to the common potential signal line; and the control chips in the two control group columns are respectively located on both sides of the common potential signal line and connected to the common potential signal line.

5. The light-emitting substrate according to claim 4, wherein Two adjacent control units share the second portion of the fixed potential signal line.

6. The light-emitting substrate according to claim 4, wherein The two control group columns in one control unit share one signal line group, and the control chips in the control unit are connected to each other through the signal line group; the signal line group includes: a power signal line, an addressing signal line and a data signal line.

7. The light-emitting substrate according to claim 6, wherein The signal line group further includes a feedback signal line; In one of the control units, the control chip at one end of the interconnected control chips is connected to the data signal line, and the control chip at the other end is connected to the feedback signal line.

8. The light-emitting substrate according to claim 2, wherein The control groups arranged in a row along the second direction constitute a control group column, and one control group column is correspondingly connected to one fixed potential signal line; The plurality of signal lines further include a plurality of common potential signal lines; the plurality of common potential signal lines extend along the second direction and are arranged along the first direction; one control group column is correspondingly connected to one common potential signal line.

9. The light-emitting substrate according to claim 8, wherein The common potential signal line and the second portion of the fixed potential signal line are spaced apart in the first direction, and each first portion of the fixed potential signal line is located between the second portion and the common potential signal line; each control chip in the control group column is adjacent to the common potential signal line and connected to the common potential signal line.

10. The light-emitting substrate according to claim 9, wherein One control group column is connected to a corresponding signal line group, and the control chips in the control group column are connected to each other through the signal line group; the signal line group includes: a power signal line, an addressing signal line and a data signal line.

11. The light-emitting substrate according to claim 10, wherein The signal line group also includes a feedback signal line, which is arranged adjacent to the common potential signal line; the control chip at one end of each of the control chips connected to each other in a control group column is connected to the data signal line, and the control chip at the other end is connected to the feedback signal line.

12. The light-emitting substrate according to claim 6 or 10, wherein: The power signal line includes a plurality of power signal line segments, and the control chips corresponding to the power signal line are sequentially connected through the power signal line segments; The addressing signal line includes a plurality of addressing signal line segments, and the control chips corresponding to the addressing signal line are sequentially connected via the addressing signal line segments; The data signal line includes a plurality of data signal line segments, and the control chips corresponding to the data signal line are sequentially connected via the data signal line segments.

13. The light-emitting substrate according to claim 7 or 11, wherein: It also includes a binding area located at a side edge of the substrate along the second direction; the binding area includes a plurality of binding pins; The second portion of each fixed potential signal line, each common potential signal line, each power signal line, each addressing signal line, each data signal line, and each feedback signal line are respectively connected to at least one binding pin.

14. The light-emitting substrate according to any one of claims 1 to 11, wherein: The light emitting element is an inorganic light emitting diode.

15. A backlight module, characterized in that: The light-emitting substrate comprises a back plate and at least one light-emitting substrate according to any one of claims 1 to 14 located on the back plate.

Images