CN218918358U - Spliced lamp panel and backlight module - Google Patents

Abstract

The application relates to the technical field of display, concretely relates to concatenation lamp plate and backlight unit, this concatenation lamp plate includes: the light-emitting device comprises at least two light-emitting panels, wherein each light-emitting panel comprises a light-emitting substrate and a plurality of first light-emitting units arranged on the light-emitting substrate, a splicing area is arranged between adjacent light-emitting substrates, and a splicing space is formed at one side provided with the first light-emitting units; the light bar comprises a transparent substrate and a plurality of second light-emitting units arranged on the transparent substrate, wherein the transparent substrate is parallel to the light-emitting substrate, the second light-emitting units comprise second light-emitting devices, and the second light-emitting devices are arranged on the transparent substrate and are located towards one side of the light-emitting substrate. According to the utility model, the light bar is used as an integral splicing transition structure, so that the product quality and the display performance are both considered, the light-emitting difference between the splice joint and the light-emitting panel is reduced, the display performance of the spliced panel is effectively improved, and the mounting stability of the light-emitting device is effectively improved.

Description

Spliced lamp panel and backlight module

Technical Field

The application relates to the technical field of display, in particular to a spliced lamp panel and a backlight module.

Background

Due to the size limitation of production equipment, when a light-emitting panel such as an LED (light-emitting diode) lamp panel is used for constructing large-size screens such as a television large screen, a market screen, a conference large screen and a exhibition hall screen, a splicing scheme is often needed, and in common large-size screens, the edges of the light-emitting panel are spliced in a mechanical structure connection or bonding mode, so that obvious splice joints can appear on the spliced screens, and the display quality after splicing is affected.

In the prior art, in order to eliminate the splice to improve the display performance after splicing, a light emitting device such as an LED is often arranged at a splicing position, and the following defects exist in this way: it is difficult to ensure display performance and splice quality, and the light emitting device easily drops due to vibration or impact, resulting in a failure in both product quality and performance of the spliced panel.

In summary, how to optimize the splicing manner of the light-emitting panel, and seek a splicing manner that combines display performance and splicing quality, is a problem to be solved in the display technology field.

Disclosure of Invention

In view of the above-mentioned difficult assurance concatenation quality among the prior art, light emitting device drops because of vibrations or impact easily, and damage risk is high, repair rate is high, leads to splice panel's product quality and performance unable shortcoming of considering, this application provides a concatenation lamp plate and backlight unit to solve above-mentioned technical problem.

The application provides a concatenation lamp plate, include:

the light-emitting panel comprises at least two light-emitting substrates and a plurality of first light-emitting units arranged on the light-emitting substrates, a splicing area is arranged between adjacent light-emitting substrates, and a splicing space is formed at one side provided with the first light-emitting units;

the light bar comprises a transparent substrate and a plurality of second light-emitting units arranged on the transparent substrate, wherein the second light-emitting units comprise second light-emitting devices, the transparent substrate is parallel to the light-emitting substrate, and the second light-emitting devices are arranged on one side of the transparent substrate, which faces the light-emitting substrate.

The spliced light panel has the advantages that the light bar is used as an integral splicing transition structure, the spliced space formed between the two light-emitting panels is spliced inversely, so that the second light-emitting devices on the light bar can be close to the light-emitting panels, the light-emitting difference between the splice joint and the light-emitting panels is reduced, the display performance of the spliced panels is improved, meanwhile, the installation stability of the light-emitting devices is effectively improved in the mode of splicing the light bar, and the product quality of the spliced panels is further effectively improved.

Further, the first light emitting unit includes a first light emitting device disposed on the light emitting substrate, and a first transparent encapsulant covering the first light emitting device.

Optionally, the second light emitting device has a first side and a second side that are disposed opposite to each other, the first side of the second light emitting device is connected to the transparent substrate, the second side of the second light emitting device is attached to the light emitting substrate, and the first light emitting device and at least part of the second light emitting device are at equal heights along a direction perpendicular to the light emitting substrate.

The structure that the second light-emitting device is close to or attached to the light-emitting substrate is adopted, so that the second light-emitting device on the lamp strip is flush with the first light-emitting device on the light-emitting panel, the light source layer difference is reduced, and the display performance of the spliced product is improved.

Optionally, the second side of the second light emitting device is provided with a reflective layer, which enhances the intensity of reflected light, and is beneficial to further increasing the light output so as to improve the display performance.

Optionally, the plurality of first light emitting units are arranged on the light emitting substrate in an array manner, and a first photoresist is arranged between adjacent first light emitting units, and the first photoresist surrounds at least one first light emitting unit, so that light mixing is reduced.

Optionally, the second light emitting unit further includes a second transparent sealing compound, the second transparent sealing compound covers a side of the transparent substrate, which is away from the second light emitting device, and the first photoresist compound and at least part of the second transparent sealing compound are at equal height along a direction perpendicular to the light emitting substrate, which is favorable for reducing light emitting difference and further improving display performance.

Optionally, the plurality of second light emitting units are arranged along the length direction of the transparent substrate, and second photoresist is arranged between adjacent second light emitting units, and separates the second light emitting units by the second photoresist, so that light mixing is reduced.

Optionally, between two of the luminous panels that splice each other, transparent substrate the transparent seal of second is glued with the second photoresist is followed in the width direction of lamp strip is glued in first photoresist respectively, makes luminous panel and lamp strip mutually support, is favorable to further improving the concatenation quality.

Optionally, the second light emitting device is adhered to the splicing area of the light emitting substrate, so that falling caused by impact or vibration is avoided, and splicing quality is further improved.

Based on the same inventive concept, the application also provides a backlight module, which comprises the spliced lamp panel and an optical film layer arranged on the light emitting side of the spliced lamp panel

The backlight module is characterized in that the light bar is used as an integral splicing transition structure, the light bar is reversely spliced into the splicing space formed between the two light-emitting panels, the second light-emitting devices on the light bar can be close to the light-emitting panels, the light-emitting difference between the splice joint and the light-emitting panels is reduced, the display performance of the spliced panels is improved, meanwhile, the installation stability of the light-emitting devices is effectively improved in the mode of splicing the light bar, and the product quality of the spliced panels is further effectively improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic diagram of an isometric structure of a spliced lamp panel according to an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram of a splicing manner of spliced light panels according to an exemplary embodiment of the present application;

FIG. 3 is a schematic view of a front cross-section of a tiled light plate according to an exemplary embodiment of the present application;

fig. 4 is a schematic view of an axial side structure of a light emitting panel according to an exemplary embodiment of the present application;

fig. 5 is a side view of a light bar shown in an exemplary embodiment of the present application.

Description of the part reference numerals

1-a light emitting panel; 101-splicing areas; 102-splicing space; 11-a light-emitting substrate; 111-a first photoresist; 12-a first light emitting unit; 121-a first light emitting device; 122-a first transparent sealing adhesive; 2-a light bar; 21-a transparent substrate; 211-a second photoresist; 22-a second light emitting unit; 221-a second light emitting device; 2211—a reflective layer; 222-a second transparent sealing glue.

Detailed Description

In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It should be noted that, the light-emitting panel described in the present application refers to a device, a component, etc. using a semiconductor light-emitting device as a light-emitting device, for example, an LED lamp panel;

in the existing light-emitting panel splicing scheme, in order to improve the display quality after splicing, light-emitting devices such as LEDs are often directly arranged between two light-emitting panels so as to cover an original splice, so that splicing of spliced light-emitting panels is realized on the premise of not damaging the display performance of a product, in actual production, the requirements on the structure and the process size of a splicing position are severe, some small-size light-emitting devices are sleeved with the light-emitting devices in the splicing mode, the splicing quality is difficult to ensure, meanwhile, the light-emitting devices are limited in structural strength and are arranged at the joints and are easy to fall off or damage due to vibration or impact, if an additional connecting and reinforcing structure is arranged, the light-emitting devices at the joints are lifted up, so that the light-emitting difference between the splice and the light-emitting panels is caused, and the splicing mode in the prior art is difficult to consider the splicing quality of the light-emitting panels while pursuing the display performance.

Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.

In an embodiment, referring to fig. 1 to 5, the present application exemplarily illustrates a spliced light panel, where the spliced light panel includes at least two light emitting panels 1 and at least two light bars 2, in one spliced light panel, the light emitting panels 1 include light emitting substrates 11 and first light emitting units 12 disposed on the light emitting substrates 11, a splicing area 101 is disposed between adjacent light emitting substrates 11, and a splicing space 102 is formed between adjacent light emitting substrates 11 on a side where the first light emitting units 12 are disposed, for placing the light bars 2, for example, in the present embodiment, a splicing area 101 is disposed on edges of two adjacent light emitting substrates 11, and the splicing areas 101 of the two light emitting panels 1 are close to each other, and a splicing space 102 is formed on a side where the first light emitting units 12 are disposed;

the light bar 2 includes a transparent substrate 21 and a second light emitting unit 22 disposed on the transparent substrate 21, wherein the transparent substrate 21 includes but is not limited to various transparent plates such as glass, PVC (poly vinyl chloride ) and the like, and the transparent substrate 21 is parallel to the light emitting substrate 11, and the second light emitting unit 22 includes a second light emitting device 221, and the second light emitting device 221 is located on the side facing the light emitting substrate 11 on the transparent substrate 21, and this structure can be understood that the light bar 2 is placed in the splicing space 102 in an inverted manner;

the splicing is to make the light bar 2 and the splicing space 102 form a matching relationship, so that the light bar 2 is embedded between the two light-emitting panels 1 to form a whole, the shock resistance of the second light-emitting unit 22 in the spliced light panel is improved, and the quality of the spliced light panel is improved; in some embodiments, the light bar 2 may be specifically fixed by bonding, clamping or welding the light bar 2 to the light emitting panel 1, and in this embodiment, a manner of inserting the light bar is shown by way of example, which will be described in detail later.

It should be noted that, in the present embodiment, the transparent substrate 21 made of transparent material is parallel to the light-emitting substrate 11, the second light-emitting unit 22 includes the second light-emitting device 221, the second light-emitting device 221 is located on the side facing the light-emitting substrate 11 on the transparent substrate 21, that is, the light bar 2 adopts a substrate-up arrangement mode, the second light-emitting device 221 is arranged below, the light bar 2 is reversely buckled at the seam of the two light-emitting panels 1, and compared with the substrate-down arrangement mode, the arrangement mode does not cause the situation that the second light-emitting device 221 is raised by the transparent substrate 21, so as to be beneficial to controlling the position of the second light-emitting device 221 relative to the first light-emitting device 121; meanwhile, in this structure, since the transparent substrate 21 is made of a transparent material, the light emitted by the second light emitting device 221 can penetrate through the transparent substrate 21, so that the second light emitting device 221 is disposed between the transparent substrate 21 and the light emitting substrate 11, so that the second light emitting device 221 can be disposed close to the light emitting substrate 11, the height difference between the second light emitting device 221 and the first light emitting device 121 relative to the light emitting substrate 11 can be reduced, the level difference of the light source is further eliminated, the uniformity of the light source is improved, the light emitting difference is reduced, and the display performance is further improved on the basis of eliminating the seam.

In the above embodiments, the description of the azimuth relationship such as "upper", "lower", and the like is used for the sake of understanding only with reference to the drawings, and is not limited to the embodiments.

It should be understood that, the first light emitting unit 12 and the second light emitting unit 22 refer to structural units with light emitting functions, and the descriptions "first" and "second" adopted in the present application are names made for convenience in distinguishing and understanding the present technical solution, and mainly represent differences in arrangement positions, arrangement manners and the like, and do not limit the functions thereof; the first light emitting unit 12 and the second light emitting unit 22 should include, as structural units having a light emitting function, light emitting devices having a light emitting function, and in some embodiments, include light emitting devices including, but not limited to, various types of LEDs such as a single color LED, a color changing LED, or a blinking LED, or semiconductor devices having a light emitting function obtained by integration of various types of LEDs, and the like.

The splicing space 102 refers to a space left between the edges and/or the edges of the board surfaces of the two light-emitting substrates 11 when the light-emitting substrates 11 of the two light-emitting panels 1 are close to each other, and the splicing space 102 is at least formed on one side of the light-emitting panel 1 where the first light-emitting unit 12 is arranged, so that the splicing space 102 is placed in the side of the light-emitting panel 1 where the first light-emitting unit 12 is located by using the light bar 2, and when the spliced light panel is used, the first light-emitting unit 12 and the second light-emitting unit 22 emit light at the same time, so that the spliced light panel is not spliced at the spliced position of the two light-emitting panels 1 during display.

It can be seen that, in the spliced light panel provided in this embodiment, by using the light bar 2 as an integral splicing transition structure, the second light emitting device 221 on the light bar 2 is spliced to the splicing space 102 formed between the two light emitting panels 1 in an inverted manner, so that the second light emitting device 221 on the light bar 2 can be close to the light emitting panels 1, thereby reducing the light emitting difference between the splice joint and the light emitting panels 1, being beneficial to improving the display performance of the spliced panels, and meanwhile, the mounting stability of the light emitting device is effectively improved by the splicing mode of the light bar 2, and further the product quality of the spliced panels is effectively improved.

In the present embodiment, the first light emitting unit 12 includes the first light emitting device 121 disposed on the light emitting substrate 11, and the first transparent encapsulant 122 covering the first light emitting device 121, the encapsulant is a sealing structure commonly used for light emitting devices, and the covered encapsulant can perform sealing, protecting and fixing functions on the light emitting devices;

it should be noted that, in the present technology, according to different materials of the sealing compound, the common sealing compound includes an opaque sealing compound and a transparent sealing compound, the transparent sealing compound is mainly used for sealing and fixing, and the colored transparent sealing compound can be used for changing the color of the light passing through the transparent sealing compound, the opaque sealing compound such as a white sealing compound is used as a photoresist, and the photoresist is used for sealing and fixing, and blocking the light, so as to avoid light mixing.

Further, in some embodiments, the uniformity of light emission is improved by setting the first light emitting device 121 and at least part of the second light emitting device 221 to be at equal height along the direction perpendicular to the light emitting substrate 11, for example, in this embodiment, the second light emitting device 221 has a first side and a second side, the first side of the second light emitting device 221 is connected with the transparent substrate 21, the second side of the second light emitting device 221 is attached to the light emitting substrate 11, so that the second light emitting device 221 and the first light emitting device 121 are uniformly high along the direction perpendicular to the light emitting substrate 11, and it is worth noting that the equal height is understood as the average height in the direction perpendicular to the light emitting substrate 11, that is, the average height of the dimensional error, the assembly allowance and the assembly error is allowed, and the attachment can be understood as the average attachment in the broad direction, for example, in some embodiments, the second light emitting device 221 is an LED chip, the lower end face of the LED chip is an electrode face, and the electrode can be attached to the light emitting substrate 11 by gluing or contact and other chip package connection modes, so that the average height of the second light emitting device 221 and the first light emitting device 121 can be attached to the average height is further improved, that the uniformity of the light emitting device 121 is further improved, and the uniformity of the light emitting device is improved.

In this embodiment, the second light emitting device 221 is provided with the reflective layer 2211 on the side that is attached to the light emitting substrate 11, that is, the second side, where the reflective layer 2211 includes, but is not limited to, DBR (distributed Bragg reflection, distributed bragg reflector) technology commonly used in the semiconductor field, that is, the bragg reflective layer 2211, and the purpose of coating the reflective layer 2211 is to increase the reflection ratio of light, so that the light emitted by the second light emitting device 221 towards the light emitting substrate 11 is more emitted, and it is to be understood that the thickness of the reflective layer 2211 in fig. 3 and 5 is only shown for convenience of distinguishing and understanding, and does not reflect the actual dimensional characteristics thereof, and the thickness of the reflective layer 2211 is very thin, so the influence on the position height of the second light emitting device 221 is negligible, and does not affect the attachment of the second light emitting device 221 to the light emitting substrate 11, and does not cause the level difference of the light source to affect the uniformity of the light source.

In some embodiments, the plurality of first light emitting units 12 are arranged on the light emitting substrate 11 in an array manner, and a first photoresist 111 is disposed between adjacent first light emitting units 12, wherein the first photoresist 111 surrounds at least one first light emitting unit 12, so as to reduce the light mixing between the first light emitting units 12.

Specifically, in the present embodiment, the first photoresist 111 is disposed on the light-emitting substrate 11, and the first light-emitting units 12 are arranged in a matrix form on the light-emitting substrate 11, and the first photoresist 111 forms the periphery boundary of each first light-emitting unit 12, so that each first light-emitting unit 12 is individually blocked in the grid-shaped compartment formed by the first photoresist 111.

In this embodiment, the second light emitting unit 22 further includes a second transparent encapsulant 222, and in some embodiments, the first transparent encapsulant 122 and at least part of the second transparent encapsulant 222 are disposed to have equal heights along a direction perpendicular to the light emitting substrate 11, for example, in this embodiment, the second transparent encapsulant 222 covers a side of the transparent substrate 21 facing away from the second light emitting device 221, and the second transparent encapsulant 222 and the first transparent encapsulant 122 are equally high along a direction perpendicular to the light emitting substrate 11, so that the light emitting panel 1 and the light bar 2 in the spliced light panel form a whole at the light emitting side, which is favorable for reducing light emitting differences and improving product appearance and display performance.

Further, the second light emitting units 22 are linearly arranged along the length direction of the transparent substrate 21, and a plurality of second photoresist 211 parallel to each other are further arranged on the transparent substrate 21, and the second photoresist 211 separates the second light emitting units 22 along the arrangement direction of the second light emitting units 22.

It should be understood that, in fig. 1 to fig. 5 shown in this embodiment, the number and arrangement manner of the light emitting units, that is, the first light emitting unit 12 and the second light emitting unit 22, are exemplary, for example, in this embodiment, the second light emitting unit 22 is provided with one row of three light emitting units along the light bar 2, the first light emitting unit 12 is provided with three rows and three columns on each of the two light emitting panels 1, after the light emitting units are spliced, the positions of the light emitting devices in the first light emitting unit 12 and the second light emitting unit 22 in each column of the light emitting panels 1 and the light bar 2 are corresponding, all the light emitting units on the spliced light panel are still arranged in a matrix of three rows and seven columns, in other embodiments, according to the difference of actual display requirements, the arrangement position, the arrangement manner, the arrangement number and the sealing manner of the first light emitting units 12 on the light emitting panel 1 and the second light emitting units 22 on the light bar 2 may be adjusted, the positions of the second light emitting units 22 and the first light emitting units 12 may also be provided according to the corresponding relation between the number and the arrangement positions, and the obtained spliced light emitting units may be arranged according to the actual arrangement requirement.

In this embodiment, on two light emitting panels 1 spliced with each other, the spacing distance of the first photoresist adhesive 111 is matched with the width of the transparent substrate 21, so that when the light bar 2 is placed in the splicing space 102, the transparent substrate 21, the second transparent sealing adhesive 222 and the second photoresist adhesive 211 are respectively attached to the first photoresist adhesive 111 along the width direction of the light bar 2, that is, the edges of the grid-shaped first photoresist adhesives 111 on the two light emitting panels 1 just enclose the boundary of the splicing space 102, so that the light bar 2 is clamped between the edges of the first photoresist adhesives 111 of the two light emitting panels 1 to form an integral splicing structure, and the spliced light panel has integrity, which is beneficial to further improving the splicing quality.

In this embodiment, the second light emitting device 221 is adhered to the splicing region 101 of the light emitting substrate 11, which is favorable for avoiding the second light emitting device 221 from being dislocated due to impact, and further improving the quality of the spliced product.

As described above, in the spliced lamp panel shown in this embodiment, by using the lamp strip as an integral splicing transition structure, the spliced space formed between two light-emitting panels is spliced, so that the spliced position can emit light normally, thereby avoiding the generation of a splice, being beneficial to improving the display performance of the spliced panel, and meanwhile, the installation stability of the light-emitting device is effectively improved by the mode of splicing the lamp strip, and further the product quality of the spliced panel is effectively improved.

Further, the spliced lamp panel shown in this embodiment also adopts a structure that the second light-emitting device is close to or attached to the light-emitting substrate, so that the second light-emitting device on the lamp strip is flush with the first light-emitting device on the light-emitting panel, the light source layer difference is reduced, and the display performance of the spliced product is improved.

In another embodiment, the application further provides a backlight module, where the backlight module includes the spliced light panel in the above embodiment and an optical film layer disposed on a light emitting side of the spliced light panel, and in some embodiments, the backlight module may be used to form a television large screen, a market screen, a conference large screen, a exhibition hall screen, and the like.

In the above-mentioned backlight module, the structure of the spliced lamp panel that it includes has been explained in detail in the above-mentioned embodiment, the produced effect of this backlight module is also one-to-one with the structure and the effect of spliced lamp panel in the above-mentioned embodiment, splice the splice space that forms between two luminescent panels through regard as monolithic concatenation transition structure with the lamp strip, splice reversely, make the second luminescent device on the lamp strip be close to with luminescent panel, the light-emitting difference between splice department and the luminescent panel has been reduced, be favorable to improving the display performance of spliced panel, simultaneously, the mode of lamp strip concatenation has effectively improved luminescent device's installation stability, and then effectively improve the product quality of spliced panel.

The above embodiments are merely illustrative of the principles of the present application and its effectiveness and are not intended to limit the present application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. It is therefore contemplated that the appended claims will cover all such equivalent modifications and changes as fall within the true spirit and scope of the disclosure.

Claims (10)

1. A splice light panel, comprising:

the light-emitting panel comprises at least two light-emitting substrates and a plurality of first light-emitting units arranged on the light-emitting substrates, a splicing area is arranged between adjacent light-emitting substrates, and a splicing space is formed at one side provided with the first light-emitting units;

the light bar comprises a transparent substrate and a plurality of second light-emitting units arranged on the transparent substrate, wherein the second light-emitting units comprise second light-emitting devices, the transparent substrate is parallel to the light-emitting substrate, and the second light-emitting devices are arranged on one side of the transparent substrate, which faces the light-emitting substrate.

2. The tiled light plate of claim 1, wherein: the first light-emitting unit comprises a first light-emitting device arranged on the light-emitting substrate and a first transparent sealing adhesive covering the first light-emitting device.

3. The tiled light plate of claim 2, wherein: the second light-emitting device is provided with a first side and a second side which are oppositely arranged, the first side of the second light-emitting device is connected with the transparent substrate, the second side of the second light-emitting device is attached to the light-emitting substrate, and the first light-emitting device and at least part of the second light-emitting device are at equal height along the direction perpendicular to the light-emitting substrate.

4. A tiled light plate according to claim 3, wherein: the second side of the second light emitting device is provided with a reflective layer.

5. The tiled light plate of claim 1, wherein: the light-emitting substrate is provided with a plurality of first light-emitting units, a first photoresist is arranged between every two adjacent first light-emitting units, and the first photoresist surrounds at least one first light-emitting unit.

6. The tiled light plate of claim 5, wherein: the second light-emitting unit further comprises a second transparent sealing adhesive, the second transparent sealing adhesive covers one side, away from the second light-emitting device, of the transparent substrate, and the first photoresist adhesive and at least part of the second transparent sealing adhesive are at equal height along the direction perpendicular to the light-emitting substrate.

7. The tiled light plate of claim 6, wherein: the second light-emitting units are distributed along the length direction of the transparent substrate, second photoresist is arranged between the adjacent second light-emitting units, and the second photoresist separates the second light-emitting units.

8. The tiled light plate of claim 7, wherein: and the transparent substrate, the second transparent sealing glue and the second photoresist glue are respectively attached to the first photoresist glue along the width direction of the light bar between the two mutually spliced light-emitting panels.

9. The tiled light plate of claim 1, wherein: the second light emitting device is adhered to the splicing region of the light emitting substrate.

10. A backlight module comprising the spliced lamp panel according to any one of claims 1 to 9 and an optical film layer disposed on a light-emitting side of the spliced lamp panel.

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