WO2025025263A1 - Light-emitting substrate, backlight module, and display apparatus - Google Patents

Abstract

A light-emitting substrate (100), a backlight module (1000), and a display apparatus (10000). The light-emitting substrate (100) comprises a driving substrate (10) and a plurality of light-emitting devices (20) arranged on the driving substrate (10). The driving substrate (10) comprises a main body portion (11) and branch portions (12). The light-emitting devices (20) are arranged on a first sub-portion (121) of each branch portion (12), and second sub-portions (122) of the branch portion (12) are arranged corresponding to the light-emitting devices (20). A portion of first signal wires (30) on the driving substrate (10) extend to the second sub-portions (122) from the first sub-portions (121), thereby mitigating the problem of existing lamp panels being prone to damage by ESD.

Description

Light-emitting substrate, backlight module and display device Technical Field

The present application relates to the field of display technology, and in particular to a light-emitting substrate, a backlight module and a display device.

Background Art

The liquid crystal display device includes a liquid crystal box and a backlight module. In order to reduce the cost of the backlight module's light board, the prior art often uses a plug-in light board, which is obtained by making multiple light boards on the same substrate and cutting them, thereby reducing costs. However, due to the limitations of the cutting process, the light board requires a larger cutting gap. If the pitch between the lights is small, the space available for routing is smaller, and the position of the lights has occupied most of the routing space, so the width of the routing and the distance to the edge of the light board can only be reduced, which makes it easy to be damaged by electrostatic discharge (ESD), resulting in dead lights.

SUMMARY OF THE INVENTION

The present application provides a light-emitting substrate, a backlight module and a display device to alleviate the technical problem that the existing light panels are easily damaged by ESD.

To solve the above problems, the technical solutions provided by this application are as follows:

The embodiment of the present application provides a light-emitting substrate, which includes at least one light-emitting sub-panel, each of which includes:

A driving substrate, the driving substrate comprising a main body and a plurality of branch parts protruding from one side of the main body, each of the branch parts comprising a first sub-part connected to the main body and at least one second sub-part protruding from one side of the first sub-part;

a plurality of light emitting devices, at least some of which are arranged on the first sub-section, and the second sub-section is arranged corresponding to the light emitting devices;

Among them, the driving substrate also includes multiple first signal lines, each of which is electrically connected to a corresponding light-emitting device, and each of the first signal lines extends from the first sub-section to the main body, and some of the first signal lines also extend from the first sub-section to the second sub-section.

In the light-emitting substrate provided in the embodiment of the present application, a plurality of the light-emitting devices are arranged on each of the first sub-sections, and a plurality of the first signal lines corresponding to the plurality of the light-emitting devices are located on a side of the light-emitting device close to the second sub-section, and the plurality of the first signal lines converge at a position close to the main body, and a portion of the converged plurality of the first signal lines extends from the first sub-section to the second sub-section.

In the light-emitting substrate provided in the embodiment of the present application, among the plurality of first signal lines that converge, the width of the first signal lines that are far away from the light-emitting device is greater than the width of the first signal lines that are close to the light-emitting device.

In the light-emitting substrate provided in the embodiment of the present application, in the protruding direction of the second sub-portion, the widths of the plurality of first signal wirings that converge gradually increase.

In the light-emitting substrate provided in the embodiment of the present application, each of the light-emitting devices corresponds to one of the second sub-portions, and in the extension direction of the first sub-portion, the protruding heights of the plurality of the second sub-portions gradually decrease.

In the light-emitting substrate provided in the embodiment of the present application, one of the at least one second sub-sections is arranged corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices.

In the light-emitting substrate provided in the embodiment of the present application, the protruding directions of the second sub-portions on two adjacent branch portions are the same.

In the light-emitting substrate provided in the embodiment of the present application, each of the branch portions further includes a third sub-portion protruding from the other side of the first sub-portion, and the third sub-portion is arranged corresponding to the light-emitting device;

The driving substrate also includes a second signal line located on a side of the light-emitting device away from the first signal line, the second signal line is electrically connected to the plurality of light-emitting devices, and the second signal line extends from the first sub-portion to the main body and passes through the third sub-portion.

In the light-emitting substrate provided in the embodiment of the present application, on two adjacent branch portions, the second sub-portion and the third sub-portion are arranged opposite to each other, and there is a gap between the second sub-portion and the corresponding third sub-portion.

In the light-emitting substrate provided in the embodiment of the present application, the number of the light-emitting sub-panels is two, and the two light-emitting sub-panels are symmetrically arranged about the center line of the light-emitting substrate.

The embodiment of the present application further provides a backlight module, which includes the light-emitting substrate of one of the aforementioned embodiments.

An embodiment of the present application further provides a display device, which includes the backlight module of one of the aforementioned embodiments.

Beneficial Effects

In the light-emitting substrate, backlight module and display device provided by the present application, the light-emitting substrate includes a driving substrate and a plurality of light-emitting devices arranged on the driving substrate, the driving substrate includes a main body and a plurality of branch parts protruding from one side of the main body, each of the branch parts includes a first sub-part connected to the main body and at least one second sub-part protruding from one side of the first sub-part, at least part of the light-emitting devices are arranged on the first sub-part, and the second sub-part is arranged corresponding to the light-emitting device, the driving substrate also includes a plurality of first signal traces, each of the first signal traces is electrically connected to a corresponding one of the light-emitting devices, and each of the first signal traces extends from the first sub-part to the main body, and part of the first signal traces also extend from the first sub-part to the second sub-part, so as to increase the wiring space of the first signal trace, so that a first signal trace with a larger width can be set, thereby reducing the risk of the first signal trace being damaged by ESD, and solving the problem that the existing light board is easily damaged by ESD.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of a top view of a light-emitting motherboard in the related art.

FIG. 2 is a schematic diagram of a top view of the structure of a light-emitting substrate provided in an embodiment of the present application.

FIG. 3 is an enlarged schematic diagram of point N in FIG. 2 .

FIG. 4 is a schematic diagram of a top view of the structure of the light-emitting motherboard after cutting provided in an embodiment of the present application.

FIG. 5 is an enlarged schematic diagram of point O in FIG. 4 .

FIG. 6 is another schematic diagram of a top view of the light-emitting substrate provided in an embodiment of the present application.

FIG. 7 is an enlarged schematic diagram of point P in FIG. 6 .

FIG8 is a schematic diagram of another top view structure of the light-emitting substrate provided in an embodiment of the present application.

FIG. 9 is another schematic diagram of a top view of the structure of the light-emitting motherboard provided in an embodiment of the present application.

FIG. 10 is a schematic cross-sectional structure diagram of a backlight module provided in an embodiment of the present application.

FIG. 11 is a schematic diagram of a cross-sectional structure of a display device provided in an embodiment of the present application.

Embodiments of the present invention

The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and regions is exaggerated for clear understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

With regard to the problem in the related art that the lamp board is easily damaged by ESD, the inventor of the present application found in research that it is mainly due to the limited wiring space on the lamp board that the width of the routing and the distance to the edge of the lamp board can only be reduced, which makes it easy to be damaged by ESD, resulting in dead lamps.

Specifically, refer to FIG. 1 , which is a schematic diagram of a top view structure of a light-emitting motherboard in the related art. In order to maximize the use of the light-emitting motherboard for making the light board and reduce the light board cost of the backlight module, the related art often uses a plug-in light board, which is obtained by making multiple light boards on the same light-emitting motherboard and cutting them, thereby reducing costs. As shown in FIG. 1 , two light boards are made on the same light-emitting motherboard, and two left and right light boards 600 are obtained after cutting. The width H of the light strips 601 on the left and right light boards 600 can be the same, for example, the width H of each light strip is 8.47 mm. However, due to the limitation of the cutting process, the lamp board 600 requires a larger cutting gap 700, for example, the cutting gap 700 is 1.53 mm. If the pitch D between the lamps 602 is smaller, for example, the pitch D between two adjacent lamps 602 is 10 mm, the space available for routing is smaller. As shown in M in FIG1 , the position of the lamp 602 has occupied most of the routing space, so that the width of the routing 603 and the distance to the border of the lamp board can only be reduced, thereby being easily damaged by ESD, resulting in dead lamps.

To this end, the present application provides a light-emitting substrate, a backlight module and a display device to solve the problem that the above-mentioned light board is easily damaged by ESD.

Please refer to Figures 2 to 5, Figure 2 is a schematic diagram of a top view of the light-emitting substrate provided in an embodiment of the present application, Figure 3 is an enlarged schematic diagram of N in Figure 2, Figure 4 is a schematic diagram of a top view of the light-emitting motherboard after cutting provided in an embodiment of the present application, and Figure 5 is an enlarged schematic diagram of O in Figure 4. Referring to Figure 2, the light-emitting substrate 100 includes at least one light-emitting sub-board 1, each of the light-emitting sub-boards 1 includes a driving substrate 10 and a plurality of light-emitting devices 20 disposed on the driving substrate 10, and the driving substrate 10 is used to drive the light-emitting devices 20 to emit light. The light-emitting device 20 can be a light-emitting diode (LED), a micro light-emitting diode (Micro-LED) or a sub-millimeter light-emitting diode (Mini Light-Emitting Diode, Mini-LED), etc.

The driving substrate 10 includes a main body 11 and a plurality of branch parts 12 protruding from one side of the main body 11, each of the branch parts 12 includes a first sub-part 121 connected to the main body 11 and at least one second sub-part 122 protruding from one side of the first sub-part 121. At least part of the light emitting device 20 is disposed on the first sub-part 121, and the second sub-part 122 is disposed corresponding to the light emitting device 20.

The driving substrate 10 also includes a plurality of first signal lines 30, each of which is electrically connected to a corresponding light-emitting device 20, and each of which extends from the first sub-portion 121 to the main body 11, and some of the first signal lines 30 also extend from the first sub-portion 121 to the second sub-portion 122, so as to increase the wiring space of the first signal lines 30, so that a first signal line 30 with a larger width can be set, thereby reducing the risk of the first signal line 30 being damaged by ESD, thereby solving the problem that the existing light board is easily damaged by ESD.

Specifically, with reference to FIG. 2 and FIG. 3 , the main body 11 extends along a first direction Y, the branch portion 12 starts from one side of the main body 11 and extends as a whole along a second direction X, and a plurality of the branch portions 12 are arranged at intervals along the first direction Y, and there is a gap between two adjacent branch portions 12. The first direction Y is different from the second direction X, for example, the first direction Y is a vertical direction, and the second direction X is a horizontal direction, then the first direction Y is perpendicular to the second direction X, of course, the present application is not limited thereto, and the first direction Y and the second direction X of the present application may also intersect at other angles.

Each of the branch portions 12 includes a first sub-portion 121 extending along the second direction X and at least one second sub-portion 122 protruding from one side of the first sub-portion 121. A plurality of the light-emitting devices 20 are disposed on each of the first sub-portion 121, and the plurality of the light-emitting devices 20 are disposed at intervals. The second sub-portion 122 is disposed corresponding to the light-emitting device 20, and one of the at least one second sub-portion 122 is disposed corresponding to the light-emitting device 20 closest to the main body 11 among the plurality of the light-emitting devices 20 on the first sub-portion 121. This embodiment is described by taking the number of the second sub-portions 122 as an example, and at least some of the second sub-portions 122 among the plurality of the second sub-portions 122 are disposed at a position close to the main body 11. That is, among the plurality of light-emitting devices 20 disposed on the first sub-portion 121, two types of light-emitting devices 20 can be divided according to their positions on the first sub-portion 121. One type of light-emitting devices 20 is located at one end of the first sub-portion 121 close to the main portion 11, and this type of light-emitting devices 20 can be called light-emitting devices 20 close to the main portion 11; the other type of light-emitting devices 20 is located at one end of the first sub-portion 121 away from the main portion 11, and this type of light-emitting devices 20 is called light-emitting devices 20 away from the main portion 11. At least some of the plurality of second sub-portions 122 are disposed corresponding to the light-emitting devices 20 close to the main portion 11, so that at least some of the plurality of second sub-portions 122 are disposed at positions close to the main portion 11. Preferably, one of the plurality of second sub-portions 122 is disposed corresponding to the light-emitting device 20 closest to the main portion 11 among the plurality of light-emitting devices 20 on the first sub-portion 121.

The first sub-portion 121 is connected to the main portion 11. Optionally, the first sub-portion 121 and the main portion 11 are integrally provided. It should be noted that, since the first sub-portion 121 is the main structure of the branch portion 12, the extension direction of the first sub-portion 121 is used in the present application to represent the overall extension direction of the branch portion 12.

The second sub-portion 122 is connected to the first sub-portion 121 . Optionally, the second sub-portion 122 and the first sub-portion 121 are integrally formed, and the second sub-portion 122 is formed by protruding and extending the first sub-portion 121 .

Optionally, each of the light-emitting devices 20 corresponds to one of the second sub-portions 122, that is, the number of the second sub-portions 122 is equal to the number of the light-emitting devices 20, and a plurality of the second sub-portions 122 are arranged at intervals on the same side of the first sub-portion 121. The interval between the center points of two adjacent second sub-portions 122 is equal to the interval between the center points of two adjacent light-emitting devices 20. In the second direction X, the width of each of the second sub-portions 122 is greater than the width of the corresponding light-emitting device 20.

It should be noted that FIG. 2 schematically shows that three branches 12 extend from one main body 11, and each branch 12 is provided with five light-emitting devices 20 and corresponding five second sub-parts 122, but the present application is not limited thereto. FIG. 2 is only for illustrating the relationship between the main body 11, the branch 12, the light-emitting device 20 and the second sub-part 122. The light-emitting sub-board 1 of the present application may include more or fewer branches 12, and each branch 12 may be provided with more or fewer light-emitting devices 20. Moreover, the number of the second sub-parts 122 may also be different from the number of the light-emitting devices 20, for example, the number of the second sub-parts 122 may be 1, 2, 3, etc. When the number of the second sub-parts 122 is 3, the three second sub-parts 122 are provided corresponding to the three light-emitting devices 20 close to the main body 11.

The first signal trace 30 is arranged on the branch portion 12 and extends from the branch portion 12 to the main body 11. Each of the first signal traces 30 is connected to one of the light emitting devices 20, and is used to provide a first signal to the corresponding light emitting device 20. A plurality of the first signal traces 30 are located on the same side of the light emitting device 20, and there is a gap between two adjacent first signal traces 30 to avoid short circuits between adjacent first signal traces 30. Optionally, the material of the first signal trace 30 includes conductive materials such as copper, aluminum, and silver.

The multiple first signal lines 30 corresponding to the multiple light-emitting devices 20 are located on one side of the light-emitting device 20 close to the second sub-section 122, and the multiple first signal lines 30 converge at a position close to the main body 11, and part of the converged multiple first signal lines 30 extends from the first sub-section 121 to the second sub-section 122.

Specifically, each of the first signal lines 30 extends from one end of the branch portion 12 away from the main portion 11 to one end close to the main portion 11, and extends from the branch portion 12 to the main portion 11, so that a plurality of the first signal lines 30 converge at a position close to the main portion 11. Moreover, when the first signal lines 30 extend on the branch portion 12, part of the first signal lines 30 also extend from the first sub-portion 121 to the second sub-portion 122, and then extend from the second sub-portion 122 to the first sub-portion 121, that is, when the first signal lines 30 extend on the first sub-portion 121, part of the first signal lines 30 also pass through the second sub-portion 122.

Due to the presence of the second sub-section 122, the space for wiring in the area corresponding to the light-emitting device 20 is increased. In this way, under the premise of ensuring the safety distance between adjacent first signal traces 30, the width of the first signal trace 30 can be increased to reduce the resistance of the first signal trace 30, and then when facing ESD, the heat generated by the first signal trace 30 can be reduced, and the probability of the first signal trace 30 melting can be reduced, thereby reducing the risk of the first signal trace 30 being damaged by ESD, reducing the risk of the light-emitting substrate 100 being damaged by ESD, and solving the problem that the existing light board is easily damaged by ESD. Among them, the safety distance between the first signal traces 30 refers to the distance to avoid short circuits between the first signal traces 30.

Specifically, the area where the light-emitting device 20 is set is defined as the device area, and the area between two adjacent light-emitting devices 20 on the same first sub-section 121 is defined as the non-device area. Since the device area is correspondingly provided with the second sub-section 122, the wiring space of the device area can be increased, thereby increasing the width of the first signal trace 30. However, the light-emitting device 20 is not provided in the non-device area, so that the entire non-device area can be used for wiring, and the first signal trace 30 with a larger width is provided.

Optionally, among the multiple first signal lines 30 that converge, the width of the first signal line 30 that is far away from the light-emitting device 20 is greater than the width of the first signal line 30 that is close to the light-emitting device 20. The first signal line 30 that is far away from the light-emitting device 20 is closer to the boundary of the branch portion 12 and is more susceptible to damage by ESD. By setting the width of the first signal line 30 that is far away from the light-emitting device 20 to be larger, the ESD resistance of the first signal line 30 that is far away from the light-emitting device 20 can be improved, thereby improving the overall ESD resistance of the light-emitting substrate 100.

In one embodiment, each of the light-emitting devices 20 corresponds to a second sub-portion 122. In the extension direction of the first sub-portion 121, the protruding heights of the plurality of second sub-portions 122 gradually decrease to increase the protruding height of the second sub-portion 122 close to the main body 11. The device area close to the main body 11 has the most first signal traces 30. By increasing the protruding height of the second sub-portion 122 in the device area close to the main body 11, the wiring space of the area can be further increased, thereby further increasing the width of the first signal trace 30. The protruding height refers to the height protruding along the protruding direction, for example, the protruding height of the second sub-portion 122 refers to the height of the second sub-portion 122 protruding from the first sub-portion 121 along the protruding direction of the second sub-portion 122. The protruding direction refers to the direction in which the second sub-portion 122 extends away from the first sub-portion 121.

Further, each of the branch portions 12 further includes a third sub-portion 123 protruding from the other side of the first sub-portion 121, and the third sub-portion 123 is arranged corresponding to the light emitting device 20. That is, the third sub-portion 123 and the second sub-portion 122 are located on opposite sides of the first sub-portion 121, the second sub-portion 122 is located on one side of the first sub-portion 121, the third sub-portion 123 is located on the other side of the first sub-portion 121, and the third sub-portion 123 is located on the side of the first sub-portion 121 away from the second sub-portion 122.

The driving substrate 10 also includes a second signal line 40 located on a side of the light-emitting device 20 away from the first signal line 30, the second signal line 40 is electrically connected to the plurality of light-emitting devices 20, and the second signal line 40 extends from the first sub-portion 121 to the main body 11 and passes through the third sub-portion 123 to increase the width of the second signal line 40.

Specifically, the driving substrate 10 further includes a plurality of electrode groups, which are arranged at intervals on each of the branch portions 12, and each of the light-emitting devices 20 corresponds to one of the electrode groups, and is electrically connected to the driving substrate 10 through the electrode groups. Each of the electrode groups includes a first electrode 51 and a second electrode 52, and each of the light-emitting devices 20 includes a first pole and a second pole, the first electrode 51 is electrically connected to the first pole, and the second electrode 52 is electrically connected to the second pole, wherein the first electrode 51 is a cathode, and the second electrode 52 is an anode, but the present application is not limited thereto, and in other embodiments, the first electrode 51 may also be an anode, and correspondingly, the second electrode 52 is a cathode.

The first signal wiring 30 is electrically connected to the first electrode 51, and the second signal wiring 40 is electrically connected to the second electrode 52, so that the first signal wiring 30 and the second signal wiring 40 are electrically connected to the light-emitting device 20. The first signal wiring 30 is used to provide a first signal to the light-emitting device 20, and the second signal wiring 40 is used to provide a second signal to the light-emitting device 20, so that the light-emitting device 20 emits light.

Optionally, on each branch 12 , all the light-emitting devices 20 are connected to the same second signal wiring 40 , that is, the second signal wiring 40 connects all the light-emitting devices 20 on one branch 12 in series to provide a second signal to each light-emitting device 20 .

The second signal wiring 40 extends from the first sub-portion 121 to the main body 11, and extends on the main body 11 together with the first signal wiring 30 along the extension direction of the main body 11. The drive substrate 10 also includes a control device 60, which is arranged on the main body 11, and the width of the main body 11 in the second direction X is greater than the width of the branch portion 12 in the first direction Y. The first signal wiring 30 and the second signal wiring 40 extend on the main body 11 to the area where the control device 60 is located, and are electrically connected to the control device 60. The control device 60 can be a driving chip or a connector, etc., and the control device 60 is used to provide a first signal to the first signal wiring 30 and provide a second signal to the second signal wiring 40.

It should be noted that FIG2 schematically shows that the first signal wire 30 and the second signal wire 40 on one branch portion 12 extend to the main body 11 and are electrically connected to the control device 60. The first signal wire 30 and the second signal wire 40 on other branches 12 also need to be electrically connected to the control device 60.

When the second signal line 40 extends on the first sub-section 121, it also passes through the third sub-section 123. By extending the second signal line 40 into the third sub-section 123, the width of the second signal line 40 can be increased to reduce the resistance of the second signal line 40. Therefore, when facing ESD, the heat generated by the second signal line 40 can be reduced, and the probability of the second signal line 40 melting can be reduced, thereby reducing the risk of the second signal line 40 being damaged by ESD, and further reducing the risk of the light-emitting substrate 100 being damaged by ESD.

Optionally, the number of the third sub-portions 123 is the same as the number of the second sub-portions 122, so that each second sub-portion 122 corresponds to one third sub-portion 123. The protruding directions of the second sub-portions 122 on two adjacent branch portions 12 are the same, so that on two adjacent branch portions 12, the second sub-portion 122 and the third sub-portion 123 are arranged opposite to each other, and there is a gap between the second sub-portion 122 and the corresponding third sub-portion 123.

The protruding height H2 of the third sub-portion 123 ranges from 0.5 mm to 5 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, and 5 mm. The protruding height H1 of the second sub-portion 122 also ranges from 0.5 mm to 5 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, and 5 mm. Optionally, the protruding height H2 of the third sub-portion 123 may be the same as the protruding height H1 of the second sub-portion 122, such as the protruding height H2 of the third sub-portion 123 is 2 mm, and the protruding height H1 of the second sub-portion 122 is also 2 mm, in which case the width H3 of the first sub-portion 121 in the first direction Y may be 6.47 mm. Of course, the present application is not limited thereto, and the protruding height H1 of the second sub-portion 122 of the present application may also be greater than the protruding height H2 of the third sub-portion 123 to further increase the wiring space of the first signal trace 30 .

How to form the light-emitting sub-panel 1 will be described in detail below.

Referring to FIG. 4 and FIG. 5 , two light-emitting sub-panels 1 are formed by cutting the light-emitting motherboard, and the two light-emitting sub-panels 1 are plugged into each other. For the convenience of description, the two light-emitting sub-panels 1 are defined as a first light-emitting sub-panel 1-1 and a second light-emitting sub-panel 1-2. The first light-emitting sub-panel 1-1 and the second light-emitting sub-panel 1-2 plugged into each other can be formed by cutting the light-emitting motherboard along the cutting line on the light-emitting motherboard, as shown in FIG. 4 . There is a cutting gap 70 between the first light-emitting sub-panel 1-1 and the second light-emitting sub-panel 1-2, so that the multiple branches 12 of the first light-emitting sub-panel 1-1 and the multiple branches 12 of the second light-emitting sub-panel 1-2 are alternately arranged at intervals.

5 , the device area of the first light-emitting sub-panel 1-1 corresponds to the non-device area of the second light-emitting sub-panel 1-2, and the non-device area of the first light-emitting sub-panel 1-1 corresponds to the device area of the second light-emitting sub-panel 1-2, so that the second sub-portion 122 and the third sub-portion 123 can be set in the device area of the first light-emitting sub-panel 1-1, and the second sub-portion 122 and the third sub-portion 123 can be set in the device area of the second light-emitting sub-panel 1-2. A recessed area is formed between two adjacent second sub-portions 122 on the first light-emitting sub-panel 1-1, and the recessed area corresponds to the non-device area. The third sub-portion 123 on the second light-emitting sub-panel 1-2 is set corresponding to the recessed area and is located in the recessed area. A recessed area is also formed between two adjacent third sub-portions 123 on the second light-emitting sub-panel 1-2, and the recessed area corresponds to the non-device area. The second sub-portion 122 on the first light-emitting sub-panel 1-1 is set corresponding to the recessed area and is located in the recessed area.

In this way, by forming the raised second sub-portion 122 and the third sub-portion 123 in the device area of the light-emitting sub-board 1, and forming a recess in the non-device area, the protrusions and recesses on the first light-emitting sub-board 1-1 and the second light-emitting sub-board 1-2 that are plugged into each other cooperate with each other. Without changing the size of the cutting gap 70 and the overall size of the light-emitting substrate 100, the wiring space in the device area can be increased, thereby increasing the width of the first signal routing 30 and the second signal routing 40.

Optionally, on two adjacent branches 12 on the light-emitting motherboard, i.e., a branch 12 on the first light-emitting sub-board 1-1 and a branch 12 on the second light-emitting sub-board 1-2, the spacing D1 between two adjacent light-emitting devices 20 is 10 mm. The distance S of the cutting gap 70 is 1.53 mm.

In one embodiment, please refer to Figures 2 to 7, Figure 6 is another schematic diagram of a top view of the light-emitting substrate provided in the embodiment of the present application, and Figure 7 is an enlarged schematic diagram of point P in Figure 6. Different from the above embodiment, in the light-emitting substrate 101 of this embodiment, in the protruding direction of the second sub-portion 122, the width of the plurality of first signal traces 30 that converge gradually increases, so as to further improve the overall anti-ESD damage capability of the light-emitting substrate 101.

6 and 7 , among the multiple first signal lines 30 that converge, the first signal line 30 that is farthest from the light-emitting device 20 has the largest width, the first signal line 30 that is closest to the light-emitting device 20 has the smallest width, and the other first signal lines 30 between the first signal line 30 with the largest width and the first signal line 30 with the smallest width have a width that is greater than the width between the first signal lines 30 with the smallest width, and less than the width of the first signal line 30 with the largest width.

By gradually increasing the width of the converged first signal wires 30 in the protruding direction of the second sub-portion 122, the ESD resistance of the first signal wires 30 closest to the boundary of the branch portion 12 is ensured, and the ESD resistance of the first signal wires 30 close to the light emitting device 20 can be improved, thereby further improving the overall ESD resistance of the light emitting substrate 101. For other descriptions, please refer to the above embodiment, which will not be repeated here.

It should be noted that, in another embodiment, the widths of the multiple first signal lines 30 that are converged can also be the same. As long as the second sub-section 122 exists, the wiring space of the first signal lines 30 can be increased, thereby increasing the width of the multiple first signal lines 30 that are converged as a whole.

In one embodiment, please refer to FIG. 2 to FIG. 8, FIG. 8 is another schematic diagram of a top view structure of a light-emitting substrate provided in an embodiment of the present application. Different from the above embodiment, in the light-emitting substrate 102 of the present embodiment, the light-emitting substrate 102 includes two light-emitting sub-panels 1, and the two light-emitting sub-panels 1 are symmetrically arranged about the center line A-A' of the light-emitting substrate 102, as shown in FIG. 8. That is, the light-emitting substrate 102 is formed by splicing two light-emitting sub-panels 1 to achieve a larger size of the light-emitting substrate 102. Of course, the present application is not limited to this, and the light-emitting substrate 102 of the present application may also include more light-emitting sub-panels 1, such as 4, 6, 8, etc. It should be noted that FIG. 8 exemplarily shows the positional relationship of the two light-emitting sub-panels 1, but does not specifically show the detailed structure of each light-emitting sub-panel 1. The detailed structure of the light-emitting sub-panel 1 can refer to the above embodiment. For other descriptions, please refer to the above embodiment, which will not be repeated here.

In one embodiment, please refer to FIG. 2 to FIG. 9, FIG. 9 is another schematic diagram of a top view structure of a light-emitting motherboard provided in an embodiment of the present application. Different from the above embodiment, the second sub-section 122 and the third sub-section 123 are in the shape of a trapezoid, as shown in FIG. 9; in the above embodiments, the second sub-section 122 and the third sub-section 123 are in the shape of a rectangle, as shown in FIG. 2, FIG. 6, and FIG. 8. By setting the shape of the second sub-section 122 to a trapezoid, when the first signal line 30 extends from the first sub-section 121 to the second sub-section 122, since the trapezoid has a certain slope, the first signal line 30 can be smoothly transitioned from the first sub-section 121 to the second sub-section 122, thereby avoiding the first signal line 30 from being disconnected. Of course, the shapes of the second sub-section 122 and the third sub-section 123 in the present application are not limited thereto, for example, the shapes of the second sub-section 122 and the third sub-section 123 can also be arc-shaped, triangle-shaped, and other regular or irregular polygons. For other descriptions, please refer to the above embodiment, which will not be repeated here.

Based on the same inventive concept, the embodiment of the present application also provides a backlight module, with reference to Figures 2 to 10, Figure 10 is a schematic diagram of a cross-sectional structure of the backlight module provided in the embodiment of the present application. With reference to Figure 10, the backlight module 1000 includes a light-emitting substrate of one of the above embodiments. This embodiment is described by taking the light module including the light-emitting substrate 100 in the above embodiment as an example.

Specifically, the backlight module 1000 further includes a back frame 200, a diffuser plate 300, an optical film 400, etc. The back frame 200 mainly serves as the skeleton of the entire backlight module 1000 and plays a role in supporting the backlight module 1000. The back frame 200 may be a box-shaped member in appearance, so as to accommodate the light-emitting substrate 100, the diffuser plate 300, the optical film 400 and other structural members. Of course, in order to improve the light utilization rate of the light-emitting substrate 100, the backlight module 1000 may also include a reflective sheet 500.

The reflective sheet 500 is located between the light-emitting substrate 100 and the back frame 200, and the diffuser 300 is located on the side of the light-emitting substrate 100 away from the reflective sheet 500. The diffuser 300 is mainly used to emit light uniformly to various angles to improve the uniformity of light output. The optical film 400 is located on the side of the diffuser 300 away from the light-emitting substrate 100, and the optical film 400 may include a lower prism, an upper prism, a brightness enhancement film, etc.

Based on the same inventive concept, the embodiment of the present application also provides a display device, please refer to Figures 2 to 11, Figure 11 is a schematic diagram of a cross-sectional structure of the display device provided in the embodiment of the present application. Referring to Figure 11, the display device 10000 includes the backlight module 1000 in the above embodiment. Specifically, the display device 10000 also includes a liquid crystal box 2000, the liquid crystal box 2000 is arranged opposite to the backlight module 1000, and the liquid crystal box 2000 is located in the light emitting direction of the backlight module 1000. The liquid crystal box 2000 includes an array substrate and a color filter substrate relative to each other and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. Of course, the display device 10000 may also include an upper polarizer and a lower polarizer, the upper polarizer is located on the side of the liquid crystal box 2000 away from the backlight module 1000, and the lower polarizer is located between the liquid crystal box 2000 and the backlight module 1000.

Optionally, the display device 10000 may include display devices such as mobile phones, tablets, televisions, laptop computers, desktop displays, commercial displays, and wearable electronic products, which are not specifically limited here.

According to the above embodiments, it can be seen that:

In the light-emitting substrate, backlight module and display device provided by the present application, the light-emitting substrate includes a driving substrate and a plurality of light-emitting devices arranged on the driving substrate, the driving substrate includes a main body and a plurality of branch parts protruding from one side of the main body, each of the branch parts includes a first sub-part connected to the main body and at least one second sub-part protruding from one side of the first sub-part, at least part of the light-emitting devices are arranged on the first sub-part, and the second sub-part is arranged corresponding to the light-emitting device, and one of the at least one second sub-part is arranged corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices, the driving substrate also includes a plurality of first signal traces, each of the first signal traces is electrically connected to a corresponding light-emitting device, and each of the first signal traces extends from the first sub-part to the main body, and part of the first signal traces also extends from the first sub-part to the second sub-part, so as to increase the wiring space of the first signal trace, so that a first signal trace with a larger width can be arranged, thereby reducing the risk of the first signal trace being damaged by ESD, and solving the problem that the existing light board is easily damaged by ESD.

In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (20)

A light-emitting substrate comprises at least one light-emitting sub-panel, each of the light-emitting sub-panels comprising: A driving substrate, the driving substrate comprising a main body and a plurality of branch portions protruding from one side of the main body, each of the branch portions comprising a first sub-portion connected to the main body and at least one second sub-portion protruding from one side of the first sub-portion; and a plurality of light emitting devices, at least some of which are arranged on the first sub-section, and the second sub-section is arranged corresponding to the light emitting devices; Among them, the driving substrate also includes multiple first signal lines, each of which is electrically connected to a corresponding light-emitting device, and each of the first signal lines extends from the first sub-section to the main body, and some of the first signal lines also extend from the first sub-section to the second sub-section. The light-emitting substrate according to claim 1, wherein a plurality of the light-emitting devices are arranged on each of the first sub-sections, a plurality of the first signal lines corresponding to the plurality of the light-emitting devices are located on a side of the light-emitting device close to the second sub-section, and the plurality of the first signal lines converge at a position close to the main body, and a portion of the converged plurality of the first signal lines extends from the first sub-section to the second sub-section. The light-emitting substrate according to claim 2, wherein, among the plurality of first signal lines that converge, a width of the first signal line that is far away from the light-emitting device is greater than a width of the first signal line that is close to the light-emitting device. The light-emitting substrate according to claim 3, wherein in the protruding direction of the second sub-portion, the widths of the plurality of first signal traces that converge gradually increase. The light-emitting substrate according to claim 2, wherein each of the light-emitting devices corresponds to one of the second sub-portions, and in the extension direction of the first sub-portion, the protruding heights of the plurality of the second sub-portions gradually decrease. The light-emitting substrate according to claim 2, wherein one of the at least one second sub-sections is arranged corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices. The light-emitting substrate according to claim 1, wherein the protruding directions of the second sub-portions on two adjacent branch portions are the same. The light-emitting substrate according to claim 1, wherein each of the branch portions further comprises a third sub-portion protruding from the other side of the first sub-portion, and the third sub-portion is arranged corresponding to the light-emitting device; The driving substrate also includes a second signal line located on a side of the light-emitting device away from the first signal line, the second signal line is electrically connected to the plurality of light-emitting devices, and the second signal line extends from the first sub-portion to the main body and passes through the third sub-portion. The light-emitting substrate according to claim 8, wherein, on two adjacent branch portions, the second sub-portion and the third sub-portion are arranged opposite to each other, and there is a gap between the second sub-portion and the corresponding third sub-portion. The light-emitting substrate according to claim 1, wherein the number of the light-emitting sub-panels is two, and the two light-emitting sub-panels are symmetrically arranged about the center line of the light-emitting substrate. A backlight module includes a light-emitting substrate, wherein the light-emitting substrate includes at least one light-emitting sub-panel, and each of the light-emitting sub-panels includes: A driving substrate, the driving substrate comprising a main body and a plurality of branch portions protruding from one side of the main body, each of the branch portions comprising a first sub-portion connected to the main body and at least one second sub-portion protruding from one side of the first sub-portion; and a plurality of light emitting devices, at least some of which are arranged on the first sub-section, and the second sub-section is arranged corresponding to the light emitting devices; Among them, the driving substrate also includes multiple first signal lines, each of which is electrically connected to a corresponding light-emitting device, and each of the first signal lines extends from the first sub-section to the main body, and some of the first signal lines also extend from the first sub-section to the second sub-section. According to the backlight module of claim 11, wherein a plurality of the light-emitting devices are arranged on each of the first sub-sections, a plurality of the first signal lines corresponding to the plurality of the light-emitting devices are located on a side of the light-emitting device close to the second sub-section, and a plurality of the first signal lines converge at a position close to the main body, and a portion of the converged plurality of the first signal lines extends from the first sub-section to the second sub-section. The backlight module according to claim 12, wherein, among the plurality of first signal lines that converge, a width of the first signal line that is far away from the light-emitting device is greater than a width of the first signal line that is close to the light-emitting device. The backlight module according to claim 13, wherein in the protruding direction of the second sub-portion, the widths of the plurality of first signal traces that converge gradually increase. The backlight module according to claim 12, wherein each of the light-emitting devices corresponds to one of the second sub-portions, and in the extension direction of the first sub-portion, the protruding heights of the plurality of the second sub-portions gradually decrease. The backlight module according to claim 12, wherein one of the at least one second sub-sections is arranged corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices. The backlight module according to claim 11, wherein the protruding directions of the second sub-portions on two adjacent branch portions are the same. The backlight module according to claim 11, wherein each of the branch portions further comprises a third sub-portion protruding from the other side of the first sub-portion, and the third sub-portion is arranged corresponding to the light emitting device; The driving substrate also includes a second signal line located on a side of the light-emitting device away from the first signal line, the second signal line is electrically connected to the plurality of light-emitting devices, and the second signal line extends from the first sub-portion to the main body and passes through the third sub-portion. The backlight module according to claim 18, wherein, on two adjacent branch portions, the second sub-portion and the third sub-portion are arranged opposite to each other, and there is a gap between the second sub-portion and the corresponding third sub-portion. A display device comprises the backlight module as claimed in claim 11.