Light-emitting substrate and backlight module

Abstract

The invention discloses a light-emitting substrate and a backlight module. The light-emitting substrate comprises a substrate body, a light-emitting layer and a light-emitting layer, the light-emitting units are arranged on the substrate in an array mode; each light-emitting unit comprises at least one light-emitting element; the plurality of control chips are arranged on the substrate in an array manner; one control chip is connected with at least two light-emitting units; wherein one control chip and all the light-emitting units connected with the control chip form a control group, and all the light-emitting units connected with the same control chip are sequentially arranged in the first direction; the plurality of control groups are arranged in an array along the first direction and the second direction; the first direction intersects with the second direction; the light-emitting substrate further comprises a plurality of signal lines; at least part of the signal lines are arranged in the first direction to form a plurality of signal line groups; each control group arranged in a column along the second direction is correspondingly connected with one signal line group. Multiple columns of light-emitting units can be controlled through 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 invention relates to the field of display technology, and in particular to a light-emitting substrate and a backlight module. Background Art

[0002] In submillimeter light-emitting diode (Mini Light-Emitting Diode, Mini LED for short) backlight products, Mini LED chips or Mini LED packaged devices are used as light-emitting elements. A light-emitting unit is composed of at least one light-emitting element. The active matrix (Active Matrix, AM for short) driving method can be used to individually control the light-emitting units in the Mini LED backlight to achieve fine local dimming.

[0003] At present, in the driving circuit of Mini LED backlight products, one column of control chips usually controls one column of light-emitting units, and the control chip and the light-emitting unit are connected by a signal line group containing multiple signal lines. However, with the pursuit of higher brightness and higher contrast of display products, the number of backlight partitions in Mini LED products has increased, which will make the number of signal lines in the driving circuit huge, which will lead to the problem of large fan-out area of ​​​​the display device and high production cost. Summary of the invention

[0004] The present invention provides a light-emitting substrate and a backlight module, wherein the number of signal lines in the driving circuit is relatively small.

[0005] One aspect of the present invention provides a light-emitting substrate, comprising: a base substrate;

[0006] A plurality of light-emitting units are arranged in an array on the substrate; one of the light-emitting units comprises at least one light-emitting element;

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

[0008] 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;

[0009] The plurality of control groups are arranged in an array along a first direction and a second direction; the first direction intersects with the second direction;

[0010] 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; and each of the control groups arranged in a row along the second direction is connected to a corresponding signal line group.

[0011] In some embodiments of the present invention, the plurality of signal lines include a plurality of fixed potential signal lines; any one of the plurality of fixed potential signal lines includes: a plurality of first portions extending along the first direction and spaced apart along the second direction and a second portion extending along the second direction, one end of each of the first portions being connected to the second portion; one control group is provided between any two adjacent first portions in the second direction, and each of the light emitting units in one of the control groups is connected to one of the first portions;

[0012] 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.

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

[0014] Every two adjacent control groups are listed as a control unit; the two second parts of the two fixed potential signal lines connected to the control unit are respectively located on both sides of the control unit, and the first parts of the two fixed potential signal lines are axially symmetrically arranged.

[0015] In some embodiments of the present invention, 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;

[0016] 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 groups are axially symmetrically distributed relative to the common potential signal line; and the control chips in the two control groups are respectively located on both sides of the common potential signal line and connected to the common potential signal line.

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

[0018] In some embodiments of the present invention, two control group columns in a control unit share one signal line group, and the control chips in the control unit are interconnected through the signal line group; the signal line group includes: a power signal line, an addressing signal line and a data signal line.

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

[0020] 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.

[0021] In some embodiments of the present invention, the control groups arranged in a row along the second direction are a control group column, and one control group column is correspondingly connected to one fixed potential signal line;

[0022] 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; and one of the control group columns is correspondingly connected to one of the common potential signal lines.

[0023] In some embodiments of the present invention, 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 is arranged adjacent to the common potential signal line and connected to the common potential signal line.

[0024] In some embodiments of the present invention, one control group column is connected to a corresponding signal line group, and each control chip in the control group column is 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.

[0025] In some embodiments of the present invention, 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 interconnected 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.

[0026] In some embodiments of the present invention, 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;

[0027] The addressing signal line comprises 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;

[0028] 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 through the data signal line segments.

[0029] Some embodiments of the present invention further include a binding area located at a side edge of the substrate along the second direction; the binding area includes a plurality of binding pins;

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

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

[0032] Another aspect of the present invention provides a backlight module, comprising a back plate and at least one of the above-mentioned light-emitting substrates located on the back plate.

[0033] The beneficial effects of the present invention are as follows:

[0034] The present invention provides a light-emitting substrate and a backlight module, wherein the light-emitting substrate comprises: a substrate substrate; a plurality of light-emitting units, which are arranged in an array on the substrate substrate; a light-emitting unit comprises at least one light-emitting element; a plurality of control chips, which are arranged in an array on the substrate substrate; a control chip connects at least two light-emitting units; wherein a 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 a first direction; a 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 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 row along the second direction is connected to a corresponding signal line group. Since the light-emitting units connected to the same control chip are arranged in a 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 the control chip, so by reducing the number of columns of the control chip, the number of signal line groups can be reduced, that is, the number of signal lines in the light-emitting substrate can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings introduced below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

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

[0037] Figure 2 A schematic diagram of the structure of a control group provided in an embodiment of the present invention;

[0038] Figure 3 One of the partial structural schematic diagrams of the light-emitting substrate provided in an embodiment of the present invention;

[0039] Figure 4 The second schematic diagram of the partial structure of the light-emitting substrate provided in the embodiment of the present invention;

[0040] Figure 5 The third schematic diagram of the partial structure of the light-emitting substrate provided in the embodiment of the present invention;

[0041] Figure 6 A schematic structural diagram of a backlight module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described below with reference to the accompanying drawings and examples. However, the exemplary embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the exemplary embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained using the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate the relative position relationship and do not represent the true proportions.

[0043] Figure 1 It is a structural schematic diagram of a light-emitting substrate in the related art.

[0044] In the related technology, Mini LED backlight products usually use AM drive to achieve fine control of backlight partitions. In the light-emitting substrate, one column of control chips controls one column of light-emitting units, and one column of control chips connects a group of signal lines. Figure 1 As shown, in the light-emitting substrate, a plurality of light-emitting units 10 and a plurality of control chips 20 are arrayed on the base substrate 100, one control chip 20 is connected to at least one light-emitting unit 10, and a plurality of control chips 20 are arranged in a plurality of columns along the second direction Y, and the light-emitting units 10 connected thereto are also arranged in a plurality of columns along the second direction Y, that is, one column of control chips correspondingly controls one column of light-emitting units. One column of control chips and its corresponding column of light-emitting units are correspondingly connected to one signal line group L1, the signal line group L1 may include a plurality of signal lines, and each signal line in the signal line group L1 extends along the second direction Y, and each signal line group L1 is arranged along the first direction X, wherein the first direction X and the second direction Y intersect.

[0045] With the pursuit of higher brightness and higher contrast of display products, the increase in the number of Mini LED backlight partitions, 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 will lead to the problem of large fan-out area of ​​the display device and high production cost. In view of this, the present invention provides a light-emitting substrate, whose wiring method can greatly 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 a plurality of 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 explained by taking one control chip 20 connected to 8 light-emitting units 10 as an example. In the 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 may be an inorganic light-emitting diode (LED). The type of the 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. may be used. The LED may be a structure with a size miniaturized to the order of hundreds of microns. The area of ​​the light-emitting region of the LED is preferably 1 mm 2 Below, more preferably 10000 μm 2 Below, more preferably 3000 μm 2 Below, more preferably 700 μm 2 Below, even below 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 in an embodiment of the present invention.

[0051] like Figure 3As shown, a plurality of light-emitting units 10 are arranged in an array on a base substrate 100, and a plurality of control chips 20 are arranged in an array on the base substrate 100, wherein the base substrate 100 may be a printed circuit board (PCB) or a glass substrate, etc., and a plurality of control groups 200 composed of a plurality of control chips and a plurality of light-emitting units are arranged in an array along a first direction X and a second direction Y, and the first direction X and the second direction Y intersect. The light-emitting substrate also includes a plurality of signal lines, at least part of the plurality of signal lines are arranged into a plurality of signal line groups L2 along the first direction X, and each control group 200 arranged in a row along the second direction Y is correspondingly connected to a 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 connect multiple columns of light-emitting units. Correspondingly, the number of signal lines required to be set for the same number of light-emitting units is also smaller, which is beneficial 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 plurality of signal lines include a plurality of fixed potential signal lines 31, and the fixed potential signal lines 31 include a plurality of first portions 311 extending along the first direction X and spaced along the 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, and each fixed potential signal line 31 is arranged in a comb shape, which can facilitate the connection of a plurality of light-emitting units 10 arranged in sequence along the first direction X. Specifically, a control group 200 is arranged between any two adjacent first portions 311 in the second direction Y, and 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 a control group column K, and a control group column K is connected to a fixed potential signal line 31. Each light-emitting unit 10 in the control group 200 includes a first end and a second end, and 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 axially symmetrically arranged.

[0055] The light emitting substrate further includes a plurality of common potential signal lines 35, the plurality of common potential signal lines 35 extending along the second direction Y and arranged along the first direction X, such as Figure 3 As shown, when two adjacent fixed potential signal lines are arranged axially symmetrically, one control unit Q can be connected to only one corresponding 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 distributed axially symmetrically 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 can share the same common potential signal line.

[0056] Furthermore, two control group columns K in a control unit Q share a signal line group L2, and a signal line group L2 includes a power signal line 32, an addressing signal line 33, and a data signal line 34. The power signal line 32 includes a plurality of power signal line segments, and the control chips 20 corresponding to the power signal line 32 are sequentially connected through the power 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 sequentially connected 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 sequentially connected through the data signal line segments.

[0057] Based on the above-mentioned signal line arrangement method, only two fixed potential signal lines 31, one power signal line 32, one addressing signal line 33, one data signal line 34 and one common potential signal line 35 are required to drive 16 columns of light-emitting units through two columns of control chips. Compared with the signal line arrangement method in the related art, the number of signal lines is greatly reduced.

[0058] The specific driving method is as follows: before starting work, the addressing 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 DC power signal to power the control chip 20; the data signal line 34 can transmit a driving control signal including multiple address prefixes and a one-to-one corresponding to the address prefix, and the control chip 20 can select a driving control signal matching the address assigned by the addressing signal line 33 for processing, and the driving control signal includes an initial signal for the control chip 20 to control each light-emitting unit 10, and the initial signal is processed by the modulation and demodulation module of the control chip 20 into a duty cycle signal and a current amplitude signal required by each light-emitting unit 10; the fixed potential signal line 31 provides a fixed potential for each 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 each light-emitting unit 10 connected to it and the current flowing through the light-emitting unit 10, thereby controlling the luminous brightness of each light-emitting unit 10.

[0059] Figure 4 The second schematic diagram of the local structure of the light-emitting substrate provided in the embodiment of the present invention.

[0060] like Figure 4 As shown, the light emitting substrate includes a plurality of control groups, and two adjacent control units Q can share a second portion 312 of a fixed potential signal line 31, so that Figure 3 The number of fixed potential signal lines in the light-emitting substrate is further reduced on the basis of the structure shown in the figure. Figure 3 The driving method of the structure shown is the same and will not be repeated here.

[0061] Figure 5 The third structural schematic diagram of the light-emitting substrate provided in an embodiment of the present invention.

[0062] In some embodiments, the arrangement of each signal line is as follows: Figure 5 As shown, each control group 200 arranged in a row along the second direction Y is a control group column K, and one control group column K is correspondingly connected to a fixed potential signal line 31. 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 is correspondingly connected to a common potential signal line 35.

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

[0064] Furthermore, one control group column K is connected to one signal line group L2, and one signal line group L2 includes one power signal line 32, one addressing signal line 33 and one data signal line 34. The power signal line 32 includes a plurality of power signal line segments, and the control chips 20 corresponding to the power signal line 32 are sequentially connected through the power 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 sequentially connected 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 sequentially connected through the data signal line segments.

[0065] Based on the above-mentioned signal line arrangement method, 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 need to be set to control one column of control chips to drive 8 columns of light-emitting units. Compared with the signal line arrangement method in the related art, the number of signal lines can be reduced.

[0066] In a specific implementation, the number of light-emitting units connected to a control chip can be adjusted as needed. According to the inventive concept of the present invention, for the same number of light-emitting units, the more light-emitting units arranged along the first direction connected to the control chip, the fewer signal lines need to be set. The present invention only lists the above three signal line arrangement methods. Based on the same inventive concept, the wiring method in the light-emitting substrate can also be adjusted according to product usage requirements, which is not limited here.

[0067] like Figure 3 , Figure 4 and Figure 5 As shown, the signal line group L2 may also include a feedback signal line 36. Figure 3 and Figure 4 In a control unit Q, one end of each interconnected control chip 20 is connected to the data signal line 34, and the other end of the control chip 20 is connected to the feedback signal line 36. Figure 5 In the wiring manner shown, the control chip 20 at one end of the interconnected control chips 20 in a control group K is connected to the data signal line 34 , and the control chip 20 at the other end is connected to 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 the corresponding signal 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. The control element can perform calculations based on the received feedback signal, and then adjust the potential applied to the fixed potential signal line 31, thereby regulating the light-emitting state of each light-emitting unit and reducing the power consumption of the light-emitting substrate.

[0069] In order to facilitate the control of the signals transmitted by each signal line, the signal line needs to be first wound to the edge of the light-emitting substrate. Therefore, a binding area is also provided in the light-emitting substrate. The binding area is located at a side of the base substrate 100 along the second direction Y. The binding area is bound to a chip on flex (or, chip on film, referred to as COF), and then the control element is connected through the chip on film. 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 the corresponding signal to each signal line.

[0070] In order to control the cost of COF, it is necessary to control the area of ​​the binding area as small as possible. Therefore, the signal lines far away from the binding area have to be routed horizontally in the edge area to extend to the binding area. Then, it is necessary to reserve an area with a certain width near the border of the substrate for placing the horizontal signal lines, that is, the fan-out area. As the number of signal lines increases due to the increase in the number of columns of light-emitting units in the light-emitting substrate, the area of ​​the fan-out area will also increase, and it will be difficult to narrow the border of the display product. The greatly reduced number of signal lines of the light-emitting substrate provided in the embodiment of the present invention can also reduce the area of ​​the fan-out area of ​​the light-emitting substrate, which is conducive to realizing the narrow border design of the display product.

[0071] Based on the same inventive concept, an embodiment of the present invention further provides a backlight module, which includes a back plate and a light-emitting substrate located on the back plate. The light-emitting substrate can be any of the light-emitting substrates mentioned above.

[0072] Figure 6 A schematic structural diagram of a backlight module provided by an embodiment of the present invention.

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

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

[0075] The light-emitting substrate 2 is located on the back panel 1, and its shape matches the back panel 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 set as a reflective layer. The reflective layer should include multiple openings for exposing each light-emitting element to avoid blocking light. The reflective layer can be used to reflect incident light to the light-emitting side of the light-emitting element, thereby improving the utilization rate of the light emitted by the light-emitting element.

[0076] Multiple support members 3 are evenly distributed between the light-emitting substrate 2 and the optical film group 4 and fixed on the light-emitting substrate 2. The support members 3 can be used to support the optical film group 4, and can also ensure a certain distance between the light-emitting substrate 2 and the optical film group 4, that is, increase the mixing distance of the light emitted by the light-emitting substrate 2.

[0077] The optical film group 4 is located on the light-emitting side of the light-emitting substrate 2, and its shape can be the same as that of the back plate 1. The optical film group 4 includes multiple film layers for realizing different functions, such as a diffusion layer, a wavelength conversion layer, and an optical film. Specifically, the diffusion layer includes a large number of scattering particles, and the light incident on the diffusion layer can be continuously refracted and reflected therein, so that the light passing through the diffusion layer is more uniform. The diffusion layer can specifically be a diffusion plate or a diffusion sheet. When the light-emitting element in the light-emitting substrate 2 emits monochromatic light, a wavelength conversion layer can be provided in the optical film group 4, and a material for wavelength conversion is provided in the wavelength conversion layer, so that the wavelength conversion layer can emit light of other colors under the excitation of the light emitted by the light-emitting element, and the excitation light and the light emitted by the light-emitting element are mixed into white light to provide backlight for the display product. The wavelength conversion layer can specifically be a quantum dot layer or a fluorescent layer. The optical film can have various forms so that the backlight module can adapt to a variety of practical scenarios. The optical film can specifically include a prism or a reflective polarizer, among which the prism can be used to change the output angle of light, and the reflective polarizer can be used to increase the light output brightness of the backlight module, improve the light utilization rate, and convert the light into polarized light.

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

[0079] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional 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.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations 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, characterized in that: include: substrate substrate; A plurality of light emitting units are arranged in an array on the substrate; One of the light emitting units comprises 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 intersects with the second direction; 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; and each of the control groups arranged in a row along the second direction is connected to a corresponding signal line group.

2. The light-emitting substrate according to claim 1, wherein: The plurality of signal lines include a plurality of fixed potential signal lines; any one of the plurality of fixed potential signal lines includes: a plurality of first portions extending along the first direction and spaced apart along the second direction and a second portion extending along the second direction, one end of each of the first portions being connected to the second portion; one control group is provided between any two adjacent first portions in the second direction, and each of the light emitting units in one of the control groups is connected to one of the first portions; 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, characterized in that: The control groups arranged in a row along the second direction are a control group column, and one control group column is correspondingly connected to one fixed potential signal line; Every two adjacent control groups are listed as a control unit; the two second parts of the two fixed potential signal lines connected to the control unit are respectively located on both sides of the control unit, and the first parts of the two fixed potential signal lines are axially symmetrically arranged.

4. The light-emitting substrate according to claim 3, characterized in that: 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 groups are axially symmetrically distributed relative to the common potential signal line; and the control chips in the two control groups 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, characterized in that: Two adjacent control units share the second portion of the fixed potential signal line.

6. The light-emitting substrate according to claim 4, characterized in that: Two control groups 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 also 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 are 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; and one of the control group columns is correspondingly connected to one of the common potential signal lines.

9. The light-emitting substrate according to claim 8, characterized in that: 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 the control chips interconnected 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, characterized in that: 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 comprises 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 through the data signal line segments.

13. The light-emitting substrate according to claim 7 or 11, characterized in that: 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 of the fixed potential signal lines, each of the common potential signal lines, each of the power signal lines, each of the addressing signal lines, each of the data signal lines and each of the feedback signal lines are respectively connected to at least one of the binding pins.

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

15. A backlight module, characterized in that: The light-emitting device 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