Light-emitting substrate, backlight module, and display apparatus

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

[0001] 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

[0002] Liquid crystal display devices consist of a liquid crystal cell and a backlight module. To reduce the cost of the backlight module's light panels, existing technology often uses plug-in light panels. These panels are fabricated on a single substrate and then cut into multiple panels, thus reducing costs. However, due to limitations in the cutting process, the panels require a larger gap between each other. If the pitch between lamps is small, there is less space available for wiring. Since the lamps already occupy most of the wiring space, the width of the wiring and the distance to the edge of the light panel must be reduced, making them more susceptible to damage from electrostatic discharge (ESD), resulting in lamp failure. SUMMARY OF THE INVENTION

[0003] The present application provides a light-emitting substrate, a backlight module and a display device to alleviate the technical problem that existing light panels are easily damaged by ESD.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] An embodiment of the present application provides a light-emitting substrate, which includes at least one light-emitting sub-panel, each of which includes:

[0006] A drive substrate comprising a main body and a plurality of branch portions protruding from one side of the main body, each branch portion 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;

[0007] a plurality of light-emitting devices, at least some of which are disposed on the first subsection, and the second subsection is disposed corresponding to the light-emitting devices;

[0008] In which, the driving substrate also includes multiple first signal lines, each of the first signal lines 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.

[0009] 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 part of the converged plurality of the first signal lines extends from the first sub-section to the second sub-section.

[0010] In the light-emitting substrate provided in the embodiment of the present application, among the multiple first signal lines that converge, the width of the first signal lines far away from the light-emitting device is greater than the width of the first signal lines close to the light-emitting device.

[0011] 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 traces that converge gradually increase.

[0012] In the light-emitting substrate provided in the embodiment of the present application, each of the light-emitting devices corresponds to one second sub-portion, and in the extension direction of the first sub-portion, the protruding heights of the plurality of second sub-portions gradually decrease.

[0013] 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.

[0014] 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.

[0015] 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;

[0016] 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-section to the main body and passes through the third sub-section.

[0017] 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.

[0018] 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.

[0019] An embodiment of the present application further provides a backlight module, which includes the light-emitting substrate of one of the aforementioned embodiments.

[0020] An embodiment of the present application further provides a display device, which includes the backlight module of one of the aforementioned embodiments. Beneficial effects

[0021] 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 lines, each of the first signal lines is electrically connected to a corresponding one of the light-emitting devices, and each of the first signal lines extends from the first sub-part to the main body, and some of the first signal lines also extend from the first sub-part to the second sub-part, so as to increase the wiring space of the first signal lines, so that a first signal line with a larger width can be set, thereby reducing the risk of the first signal lines being damaged by ESD, solving the problem that the existing light panels are easily damaged by ESD. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0023] FIG1 is a schematic diagram of a top view of a light-emitting motherboard in the related art.

[0024] FIG2 is a schematic diagram of a top view of the light-emitting substrate provided in an embodiment of the present application.

[0025] FIG3 is an enlarged schematic diagram of point N in FIG2 .

[0026] FIG4 is a schematic diagram of a top view of the structure of the light-emitting motherboard after cutting provided by an embodiment of the present application.

[0027] FIG5 is an enlarged schematic diagram of point O in FIG4 .

[0028] FIG6 is another schematic diagram of a top view of the light-emitting substrate provided in an embodiment of the present application.

[0029] FIG7 is an enlarged schematic diagram of point P in FIG6 .

[0030] FIG8 is a schematic diagram of another top view of the light-emitting substrate provided in an embodiment of the present application.

[0031] FIG9 is another schematic top view of the structure of the light-emitting motherboard provided in an embodiment of the present application.

[0032] FIG10 is a schematic diagram of a cross-sectional structure of a backlight module provided in an embodiment of the present application.

[0033] FIG11 is a schematic diagram of a cross-sectional structure of a display device provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0034] 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 this 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 areas is exaggerated for clarity of 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.

[0035] In response to the problem in related technologies that lamp boards are easily damaged by ESD, the inventors of this application found in their research that this is mainly due to the limited wiring space on the lamp board, which results in the width of the traces and the distance to the edge of the lamp board having to be reduced, making them easily damaged by ESD and causing dead lamps.

[0036] Specifically, referring to Figure 1, Figure 1 is a schematic top view of a light-emitting motherboard structure in the related art. To maximize the utilization of the light-emitting motherboard used to make the light board and reduce the light board cost of the backlight module, the related art often uses a plug-in light board. This plug-in light board is obtained by manufacturing multiple light boards on the same light-emitting motherboard and cutting them, thereby reducing costs. As shown in Figure 1, two light boards are manufactured on the same light-emitting motherboard. After cutting, two left and right light boards 600 are obtained. 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 small, for example, the pitch D between two adjacent lamps 602 is 10 mm, the space available for wiring will be smaller. As shown in M ​​in Figure 1, the position of the lamp 602 has occupied most of the wiring space, so that the width of the wiring 603 and the distance to the edge of the lamp board can only be reduced, making it easy to be damaged by ESD, resulting in dead lamps.

[0037] 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.

[0038] Please refer to Figures 2 to 5. Figure 2 is a schematic top view of a light-emitting substrate according to an embodiment of the present application. Figure 3 is an enlarged schematic diagram of point N in Figure 2. Figure 4 is a schematic top view of a cut light-emitting motherboard according to an embodiment of the present application. Figure 5 is an enlarged schematic diagram of point O in Figure 4. Referring to Figure 2, a light-emitting substrate 100 includes at least one light-emitting sub-board 1. Each light-emitting sub-board 1 includes a driver substrate 10 and a plurality of light-emitting devices 20 disposed on the driver substrate 10. The driver substrate 10 is configured to drive the light-emitting devices 20 to emit light. The light-emitting devices 20 may be light-emitting diodes (LEDs), micro-LEDs (micro-LEDs), or sub-millimeter light-emitting diodes (mini-LEDs).

[0039] The drive substrate 10 includes a main body 11 and a plurality of branch portions 12 protruding from one side of the main body 11. Each branch portion 12 includes a first sub-portion 121 connected to the main body 11 and at least one second sub-portion 122 protruding from one side of the first sub-portion 121. At least some of the light-emitting devices 20 are disposed on the first sub-portion 121, and the second sub-portions 122 are disposed corresponding to the light-emitting devices 20.

[0040] 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 the first signal lines 30 extends from the first sub-section 121 to the main body 11, and some of the first signal lines 30 also extend from the first sub-section 121 to the second sub-section 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.

[0041] Specifically, with reference to Figures 2 and 3 , the main body 11 extends along a first direction Y, and the branch portions 12 extend from one side of the main body 11 and extend as a whole along a second direction X. A plurality of the branch portions 12 are arranged at intervals along the first direction Y, with a gap between adjacent branches 12. The first direction Y and the second direction X are different. For example, if 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 to this, and the first direction Y and the second direction X of the present application may also intersect at other angles.

[0042] Each branch portion 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. Multiple light-emitting devices 20 are disposed on each first sub-portion 121, with the multiple light-emitting devices 20 spaced apart. The second sub-portions 122 are disposed corresponding to the light-emitting devices 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 portion 11 among the multiple light-emitting devices 20 on the first sub-portion 121. This embodiment uses a plurality of second sub-portions 122 as an example, and at least some of the multiple second sub-portions 122 are disposed near the main portion 11. That is, the plurality of light-emitting devices 20 disposed on the first sub-section 121 can be divided into two categories based on their position on the first sub-section 121: one category of light-emitting devices 20 is located at an end of the first sub-section 121 close to the main body 11, and this category of light-emitting devices 20 can be referred to as light-emitting devices 20 close to the main body 11; the other category of light-emitting devices 20 is located at an end of the first sub-section 121 away from the main body 11, and this category of light-emitting devices 20 is referred to as light-emitting devices 20 away from the main body 11. At least some of the plurality of second sub-sections 122 are disposed corresponding to the light-emitting devices 20 close to the main body 11, such that at least some of the plurality of second sub-sections 122 are disposed close to the main body 11. Preferably, one of the plurality of second sub-sections 122 is disposed corresponding to the light-emitting device 20 closest to the main body 11 among the plurality of light-emitting devices 20 on the first sub-section 121.

[0043] The first sub-section 121 is connected to the main body 11. Optionally, the first sub-section 121 and the main body 11 are integrally formed. It should be noted that since the first sub-section 121 is the main structure of the branch portion 12, the extension direction of the first sub-section 121 is used herein to represent the overall extension direction of the branch portion 12.

[0044] 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 a protruding extension of the first sub-portion 121 .

[0045] Optionally, each light-emitting device 20 corresponds to one second sub-section 122, that is, the number of second sub-sections 122 is equal to the number of light-emitting devices 20, and multiple second sub-sections 122 are arranged at intervals on the same side of the first sub-section 121. The interval between the center points of two adjacent second sub-sections 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 second sub-section 122 is greater than the width of the corresponding light-emitting device 20.

[0046] It should be noted that FIG2 schematically shows three branches 12 extending from one main body 11, with each branch 12 being provided with five light-emitting devices 20 and corresponding five second sub-parts 122. However, the present application is not limited thereto. FIG2 merely illustrates the relationship between the main body 11, the branches 12, the light-emitting devices 20, and the second sub-parts 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 one, two, three, etc. When the number of the second sub-parts 122 is three, the three second sub-parts 122 are provided corresponding to the three light-emitting devices 20 near the main body 11.

[0047] The first signal trace 30 is disposed on the branch portion 12 and extends from the branch portion 12 to the main body 11. Each first signal trace 30 is connected to one of the light-emitting devices 20 and is configured to provide a first signal to the corresponding light-emitting device 20. Multiple first signal traces 30 are located on the same side of the light-emitting device 20, with a gap between two adjacent first signal traces 30 to prevent short circuits between adjacent first signal traces 30. Optionally, the first signal trace 30 is made of a conductive material such as copper, aluminum, or silver.

[0048] The multiple first signal lines 30 corresponding to the multiple light-emitting devices 20 are located on the 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.

[0049] Specifically, each first signal trace 30 extends from an end of the branch portion 12 away from the main portion 11 to an end closer to the main portion 11, and extends from the branch portion 12 to the main portion 11, so that multiple first signal traces 30 converge near the main portion 11. Furthermore, when the first signal trace 30 extends on the branch portion 12, some of the first signal traces 30 also extend from the first sub-portion 121 to the second sub-portion 122, and then from the second sub-portion 122 to the first sub-portion 121. In other words, when the first signal trace 30 extends on the first sub-portion 121, some of the first signal traces 30 also pass through the second sub-portion 122.

[0050] Due to the presence of the second sub-section 122, the space available for wiring in the area corresponding to the light-emitting device 20 is increased. In this way, while ensuring a safe 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. In addition, when facing ESD, the heat generated by the first signal trace 30 can be reduced, reducing the probability of the first signal trace 30 melting, 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 of existing light panels being easily damaged by ESD. The safe distance between the first signal traces 30 refers to the distance that prevents short circuits between the first signal traces 30.

[0051] Specifically, the area where the light-emitting devices 20 are located is defined as the device area, and the area between two adjacent light-emitting devices 20 on the same first subsection 121 is defined as the non-device area. Because the second subsection 122 is located in the device area, this increases the wiring space in the device area, thereby increasing the width of the first signal trace 30. However, the non-device area is devoid of the light-emitting devices 20, allowing the entire non-device area to be used for wiring, allowing for the installation of the wider first signal trace 30.

[0052] Optionally, among the multiple first signal lines 30 that converge, the width of the first signal lines 30 that are farther away from the light-emitting device 20 is greater than the width of the first signal lines 30 that are closer to the light-emitting device 20. The first signal lines 30 that are farther away from the light-emitting device 20 are closer to the boundary of the branch portion 12 and are more susceptible to ESD damage. By setting the width of the first signal lines 30 farther away from the light-emitting device 20 to be larger, the ESD damage resistance of the first signal lines 30 farther away from the light-emitting device 20 can be improved, thereby improving the overall ESD resistance of the light-emitting substrate 100.

[0053] In one embodiment, each light-emitting device 20 corresponds to a second sub-portion 122. The protruding heights of the multiple second sub-portions 122 gradually decrease along the extension direction of the first sub-portion 121, thereby increasing the protruding height of the second sub-portion 122 closer to the main portion 11. The device region near the main portion 11 has the most first signal traces 30. By increasing the protruding height of the second sub-portion 122 in the device region near the main portion 11, the wiring space in this region can be further increased, thereby further increasing the width of the first signal trace 30. The protruding height refers to the height of the second sub-portion 122 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.

[0054] Furthermore, each branch portion 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 disposed 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, and 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.

[0055] 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. 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.

[0056] Specifically, the driving substrate 10 further includes a plurality of electrode groups, which are arranged at intervals on each of the branch portions 12. 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. Each of the light-emitting devices 20 includes a first electrode and a second electrode. The first electrode 51 is electrically connected to the first electrode, and the second electrode 52 is electrically connected to the second electrode. The first electrode 51 is a cathode, and the second electrode 52 is an anode. However, the present application is not limited thereto. In other embodiments, the first electrode 51 may also be an anode, and correspondingly, the second electrode 52 is a cathode.

[0057] The first signal trace 30 is electrically connected to the first electrode 51, and the second signal trace 40 is electrically connected to the second electrode 52, so that the first signal trace 30 and the second signal trace 40 are electrically connected to the light-emitting device 20. The first signal trace 30 is used to provide a first signal to the light-emitting device 20, and the second signal trace 40 is used to provide a second signal to the light-emitting device 20 to enable the light-emitting device 20 to emit light.

[0058] Optionally, on each branch 12 , all the light-emitting devices 20 are connected to the same second signal line 40 , that is, the second signal line 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 .

[0059] The second signal trace 40 extends from the first sub-portion 121 to the main portion 11 and extends on the main portion 11 along the extension direction of the main portion 11 together with the first signal trace 30. The drive substrate 10 also includes a control device 60, which is disposed on the main portion 11. The width of the main portion 11 in the second direction X is greater than the width of the branch portion 12 in the first direction Y. The first signal trace 30 and the second signal trace 40 extend on the main portion 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 driver chip or a connector, etc., and is used to provide a first signal to the first signal trace 30 and a second signal to the second signal trace 40.

[0060] It should be noted that FIG2 schematically shows that the first signal trace 30 and the second signal trace 40 on one branch portion 12 extend to the main portion 11 and are electrically connected to the control device 60. The first signal trace 30 and the second signal trace 40 on the other branches 12 also need to be electrically connected to the control device 60.

[0061] 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 is 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.

[0062] 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 a third sub-portion 123. The second sub-portions 122 on two adjacent branches 12 have the same protruding direction. Thus, on two adjacent branches 12, the second sub-portions 122 and the third sub-portions 123 are arranged opposite each other, and there is a gap between the second sub-portion 122 and the corresponding third sub-portion 123.

[0063] The protruding height H2 of the third sub-portion 123 ranges from 0.5 mm to 5 mm, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, or 5 mm. The protruding height H1 of the second sub-portion 122 also ranges from 0.5 mm to 5 mm, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, or 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. For example, if 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, then 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. 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 .

[0064] How to form the light-emitting sub-panel 1 will be described in detail below.

[0065] Referring to Figures 4 and 5 , the 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 ease 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. Cutting the light-emitting motherboard along the cutting lines on the light-emitting motherboard forms the first light-emitting sub-panel 1-1 and the second light-emitting sub-panel 1-2, which are plugged into each other, as shown in Figure 4 . A cutting gap 70 is defined 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 arranged alternately.

[0066] Referring to Figure 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. Therefore, the second sub-section 122 and the third sub-section 123 can be disposed in the device area of ​​the first light-emitting sub-panel 1-1, and the second sub-section 122 and the third sub-section 123 can be disposed in the device area of ​​the second light-emitting sub-panel 1-2. A recessed area is formed between two adjacent second sub-sections 122 on the first light-emitting sub-panel 1-1. This recessed area corresponds to the non-device area. The third sub-section 123 on the second light-emitting sub-panel 1-2 is disposed corresponding to and located within this recessed area. A recessed area is also formed between two adjacent third sub-sections 123 on the second light-emitting sub-panel 1-2. This recessed area corresponds to the non-device area. The second sub-section 122 on the first light-emitting sub-panel 1-1 is disposed corresponding to and located within this recessed area.

[0067] 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 of the device area can be increased, thereby increasing the width of the first signal trace 30 and the second signal trace 40.

[0068] Optionally, on two adjacent branches 12 on the light-emitting motherboard, i.e., one branch 12 on the first light-emitting sub-board 1-1 and one 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.

[0069] In one embodiment, referring to Figures 2 to 7 , Figure 6 is a schematic top view of another light-emitting substrate provided in an embodiment of the present application, and Figure 7 is an enlarged schematic view of point P in Figure 6 . Unlike the above embodiment, in the light-emitting substrate 101 of this embodiment, the width of the plurality of first signal traces 30 converging in the protruding direction of the second sub-portion 122 gradually increases, thereby further improving the overall ESD resistance of the light-emitting substrate 101.

[0070] 6 and 7 , among the multiple first signal lines 30 that converge, the first signal line 30 farthest from the light-emitting device 20 has the largest width, and the first signal line 30 closest to the light-emitting device 20 has the smallest width. The widths of the other first signal lines 30 located between the first signal line 30 with the largest width and the first signal line 30 with the smallest width are greater than the widths between the first signal lines 30 with the smallest widths, and less than the width of the first signal line 30 with the largest width.

[0071] By gradually increasing the width of the converging first signal traces 30 in the protruding direction of the second sub-portion 122, while ensuring the ESD resistance of the first signal traces 30 closest to the boundary of the branch portion 12, the ESD resistance of the first signal traces 30 near the light-emitting device 20 can also be improved, thereby further improving the overall ESD resistance of the light-emitting substrate 101. For other explanations, please refer to the above embodiment and will not be repeated here.

[0072] It should be noted that, in another embodiment, the widths of the multiple first signal lines 30 that converge 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 converge as a whole.

[0073] In one embodiment, please refer to Figures 2 to 8. Figure 8 is another schematic diagram of a top view of the light-emitting substrate provided in an embodiment of the present application. Unlike the above embodiment, in the light-emitting substrate 102 of this 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 Figure 8. That is, the light-emitting substrate 102 is formed by splicing two light-emitting sub-panels 1 together to achieve a larger size of the light-emitting substrate 102. Of course, the present application is not limited to this. The light-emitting substrate 102 of the present application may also include more light-emitting sub-panels 1, for example, the number of light-emitting sub-panels 1 is 4, 6, 8, etc. It should be noted that Figure 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 and will not be repeated here.

[0074] In one embodiment, please refer to Figures 2 to 9. Figure 9 is a schematic top view of another structure of a light-emitting motherboard provided in an embodiment of the present application. Unlike the above-mentioned embodiments, the second sub-section 122 and the third sub-section 123 are trapezoidal in shape, as shown in Figure 9. In the above-mentioned embodiments, the second sub-section 122 and the third sub-section 123 are rectangular in shape, as shown in Figures 2, 6, and 8. By setting the second sub-section 122 to be trapezoidal in shape, as the first signal trace 30 extends from the first sub-section 121 to the second sub-section 122, the trapezoidal shape has a certain slope, which allows the first signal trace 30 to transition smoothly from the first sub-section 121 to the second sub-section 122, thus preventing the first signal trace 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 to these. For example, the second sub-section 122 and the third sub-section 123 can also be circular arcs, triangles, or other regular or irregular polygons. For other explanations, please refer to the above-mentioned embodiments and will not be repeated here.

[0075] Based on the same inventive concept, the present embodiment further provides a backlight module. Referring to Figures 2 to 10 , Figure 10 is a schematic cross-sectional view of the backlight module provided in the present embodiment. Referring to Figure 10 , backlight module 1000 includes a light-emitting substrate according to one of the aforementioned embodiments. This embodiment uses the light-emitting substrate 100 of the aforementioned embodiment as an example.

[0076] Specifically, the backlight module 1000 further includes a back frame 200, a diffuser plate 300, an optical film 400, and the like. The back frame 200 primarily serves as the skeleton of the entire backlight module 1000, supporting the backlight module 1000. The back frame 200 may be box-shaped to accommodate the light-emitting substrate 100, the diffuser plate 300, the optical film 400, and other structural components. Of course, to improve light utilization efficiency of the light-emitting substrate 100, the backlight module 1000 may also include a reflective sheet 500.

[0077] The reflective sheet 500 is located between the light-emitting substrate 100 and the back frame 200. The diffuser 300 is located on the side of the light-emitting substrate 100 away from the reflective sheet 500. The diffuser 300 is primarily used to evenly emit light at all angles to improve light uniformity. The optical film 400 is located on the side of the diffuser 300 away from the light-emitting substrate 100. The optical film 400 may include a lower prism, an upper prism, a brightness enhancement film, etc.

[0078] Based on the same inventive concept, an embodiment of the present application further provides a display device. Please refer to Figures 2 to 11. Figure 11 is a schematic cross-sectional view of a display device provided in an embodiment of the present application. Referring to Figure 11, the display device 10000 includes the backlight module 1000 described in the above embodiment. Specifically, the display device 10000 also includes a liquid crystal cell 2000, which is disposed opposite to the backlight module 1000 and located in the light emitting direction of the backlight module 1000. The liquid crystal cell 2000 includes an array substrate and a color filter substrate facing 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 cell 2000 away from the backlight module 1000, and the lower polarizer is located between the liquid crystal cell 2000 and the backlight module 1000.

[0079] Optionally, the display device 10000 may include display devices such as mobile phones, tablets, televisions, laptops, desktop displays, commercial displays, and wearable electronic products, which are not specifically limited here.

[0080] According to the above embodiments, it can be seen that:

[0081] In the light-emitting substrate, backlight module and display device provided in 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 branches protruding from one side of the main body, each of the branch portions includes 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, at least some of the light-emitting devices are arranged on the first sub-portion, and the second sub-portion is arranged corresponding to the light-emitting device, and one of the at least one second sub-portion 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-portion to the main body, and some of the first signal traces also extend from the first sub-portion to the second sub-portion, so as to increase the wiring space of the first signal traces, thereby allowing the arrangement of first signal traces with a larger width, thereby reducing the risk of the first signal traces being damaged by ESD, and solving the problem that the existing light panels are easily damaged by ESD.

[0082] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] The above is a detailed introduction to the embodiments of the present application. 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 solutions and core ideas 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. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A light-emitting substrate, comprising at least one light-emitting sub-panel, each of which comprises: 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.

2. 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, 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.

3. The light-emitting substrate according to claim 2, wherein: Among the plurality of first signal lines that converge, the width of the first signal lines that are far from the light-emitting device is greater than the width of the first signal lines that are close to the light-emitting device.

4. 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 wirings that converge gradually increase.

5. 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 extending direction of the first sub-portions, the protruding heights of the plurality of second sub-portions gradually decrease.

6. The light emitting substrate according to claim 2, wherein: One of the at least one second sub-section is disposed corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices.

7. 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.

8. 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.

9. 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.

10. 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.

11. A backlight module, comprising a light-emitting substrate, wherein the light-emitting substrate comprises at least one light-emitting sub-panel, and each of the light-emitting sub-panels comprises: 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.

12. The backlight module according to claim 11, wherein: 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.

13. The backlight module according to claim 12, wherein: Among the plurality of first signal lines that converge, the width of the first signal lines that are far from the light-emitting device is greater than the width of the first signal lines that are close to the light-emitting device.

14. 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 wirings that converge gradually increase.

15. 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 extending direction of the first sub-portions, the protruding heights of the plurality of second sub-portions gradually decrease.

16. The backlight module according to claim 12, wherein: One of the at least one second sub-section is disposed corresponding to the light-emitting device closest to the main body among the plurality of light-emitting devices.

17. The backlight module according to claim 11, wherein: The protruding directions of the second sub-portions on two adjacent branch portions are the same.

18. 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.

19. 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.

20. A display device comprising the backlight module according to claim 11.

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