Backlight module and display device

Abstract

The present application discloses a backlight module and a display device, which relate to the field of display technology, and include a first lamp board and a second lamp board, wherein the first lamp board and the second lamp board are spliced ​​together by seams, an area of ​​the first lamp board close to the second lamp board is a first adjacent seam area, an area of ​​the second light board close to the first light board is a second adjacent seam area, and a plurality of lamp bead assemblies are arranged in the first adjacent seam area and the second adjacent seam area; the lamp bead assemblies include main lamp beads and auxiliary lamp beads, the auxiliary lamp beads are arranged on one side of the main lamp beads, and the light output brightness of the auxiliary lamp beads toward the seam is greater than the light output brightness away from the seam; the present application improves the splicing shadow problem and ensures the display effect through the above design.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] With the development of LED display technology, LED display screens are widely used in various fields due to their advantages such as low cost, low power consumption, high visibility and assembly freedom, especially in the field of sub-millimeter light emitting diodes (Mini Light Emitting Diode, Mini LED).

[0003] Mini LED light panels are LED devices with chip sizes between 50 and 200 μm. With the rapid development of Mini LED display technology, Mini LED display products have been widely used in ultra-large screen high-definition display fields such as monitoring and command, high-definition broadcasting, high-end cinemas, medical diagnosis, advertising display, conferences and exhibitions, office display, virtual reality, etc.

[0004] The LED backlight module is composed of light panels. Due to the limitations of machining accuracy and splicing accuracy, there will be splicing gaps at the splicing of the light panels of the LED display device. In this way, when the LED is used as a backlight source, there will be shadows at the splicing of the light panels, which will not be good for the overall viewing experience and will affect the display effect. Therefore, this is a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to provide a backlight module and a display device that improve the splicing shadow problem and ensure the display effect.

[0006] The present application discloses a backlight module, including a first light board and a second light board, the first light board and the second light board are connected by seams, the area of ​​the first light board close to the second light board is a first adjacent seam area, the area of ​​the second light board close to the first light board is a second adjacent seam area, the first adjacent seam area and the second adjacent seam area are both provided with a plurality of lamp bead assemblies; the lamp bead assemblies include main lamp beads and auxiliary lamp beads, the auxiliary lamp beads are arranged on one side of the main lamp beads, and the light output brightness of the auxiliary lamp beads toward the seam is greater than the light output brightness away from the seam.

[0007] Optionally, the multiple lamp bead assemblies include a first column of lamp bead assemblies and a second column of lamp bead assemblies, the first column of lamp bead assemblies are arranged on a side of the first adjacent seam area close to the seam, the second column of lamp bead assemblies are arranged on a side of the second adjacent seam area close to the seam, and the central axis of the light-emitting surface of the auxiliary lamp bead is biased toward the seam.

[0008] Optionally, the light-emitting surface of the auxiliary lamp bead forms an angle with the horizontal line, and the angle is 5-15°.

[0009] Optionally, the auxiliary lamp beads include a first auxiliary lamp bead, a second auxiliary lamp bead, a third auxiliary lamp bead and a fourth auxiliary lamp bead, and the first auxiliary lamp bead, the second auxiliary lamp bead, the third auxiliary lamp bead and the fourth auxiliary lamp bead are respectively arranged in the peripheral area of ​​the main lamp bead.

[0010] Optionally, the first auxiliary lamp bead, the second auxiliary lamp bead, the third auxiliary lamp bead and the fourth auxiliary lamp bead are respectively arranged corresponding to the four corners of the main lamp bead; the third auxiliary lamp bead and the fourth auxiliary lamp bead are arranged opposite to each other and are arranged on a side of the main lamp bead close to the joint;

[0011] The first auxiliary lamp bead and the second auxiliary lamp bead are arranged opposite to each other and are arranged on a side of the main lamp bead away from the joint, and the light emission angles of the third auxiliary lamp bead and the fourth auxiliary lamp bead are greater than the light emission angles of the first auxiliary lamp bead and the second auxiliary lamp bead;

[0012] The backlight module also includes a light board controller, a first control circuit, a second control circuit and a third control circuit. The light board controller, the first control circuit, the second control circuit and the third control circuit are all arranged on the first light board or the second light board. The main lamp bead is connected to the light board controller through the first control circuit, the first auxiliary lamp bead and the second auxiliary lamp bead are connected to the light board controller through the second control circuit, and the third auxiliary lamp bead and the fourth auxiliary lamp bead are connected to the light board controller through the third control circuit.

[0013] Optionally, the distance between the auxiliary lamp beads and the main lamp beads is equal to the distance between every two intervals of the main lamp beads.

[0014] Optionally, the diameter of the main lamp bead is greater than the diameter of the auxiliary lamp bead.

[0015] Optionally, the auxiliary lamp beads include a first auxiliary lamp bead, a second auxiliary lamp bead, a third auxiliary lamp bead and a fourth auxiliary lamp bead, the first auxiliary lamp bead and the second auxiliary lamp bead are arranged in parallel and above the main lamp bead; the third auxiliary lamp bead and the fourth auxiliary lamp bead are arranged in parallel and below the main lamp bead.

[0016] Optionally, the first lamp panel also includes a third adjacent seam area and a fourth adjacent seam area, the third adjacent seam area is located on a side of the first adjacent seam area away from the second adjacent seam area, and the fourth adjacent seam area is located on a side of the second adjacent seam area away from the first adjacent seam area; the multiple lamp bead assemblies also include a third column of lamp bead assemblies and a fourth column of lamp bead assemblies, the third column of lamp bead assemblies are arranged in the third adjacent seam area, and the fourth column of lamp bead assemblies are arranged in the fourth adjacent seam area; the light-emitting angle of the auxiliary lamp beads of the first column of lamp bead assemblies is greater than the light-emitting angle of the auxiliary lamp beads of the third column of lamp bead assemblies; the light-emitting angle of the auxiliary lamp beads of the second column of lamp bead assemblies is greater than the light-emitting angle of the auxiliary lamp beads of the fourth column of lamp bead assemblies.

[0017] The present application also discloses a display device, comprising a display panel and the backlight module as described above, wherein the display panel and the backlight module are arranged opposite to each other, and the backlight module provides a backlight source for the display panel.

[0018] Compared with the prior art in which dark shadows will appear at the joints of light boards when LEDs are used as backlight sources, resulting in a poor overall viewing experience, the backlight module of the present application includes a first light board and a second light board, which are connected by seams, an area of ​​the first light board close to the second light board is a first adjacent seam area, an area of ​​the second light board close to the first light board is a second adjacent seam area, and a plurality of lamp bead assemblies are provided in the first adjacent seam area and the second adjacent seam area; the lamp bead assemblies include main lamp beads and auxiliary lamp beads, the auxiliary lamp beads are arranged on one side of the main lamp beads, and the brightness of the light emitted by the auxiliary lamp beads toward the seam is greater than the brightness of the light emitted away from the seam; in this way, most of the light emitted by the auxiliary lamp beads is directed toward the seam, that is, the seam can be filled with light by the auxiliary lamp beads, and the auxiliary lamp beads cooperate with the main lamp beads to make the light at the seam relatively full, thereby improving the problem of dark shadows at the seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the first light board and the second light board of the backlight module of the present application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure of the middle A area;

[0022] Figure 3It is a schematic diagram of the block diagram structure of the display device of the present application;

[0023] Figure 4 This is a schematic diagram of the light-emitting structure of the auxiliary lamp bead provided in the first embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of a lamp bead assembly provided in the second embodiment of the present application;

[0025] Figure 6 It is a schematic diagram of the structure of the first light board and the second light board provided in the third embodiment of the present application.

[0026] Among them, 10, display device; 100, backlight module; 110, first lamp board; 111, first adjacent seam area; 112, third adjacent seam area; 120, second lamp board; 121, second adjacent seam area; 122, fourth adjacent seam area; 130, lamp bead assembly; 131, first column lamp bead assembly; 132, second column lamp bead assembly; 133, third column lamp bead assembly; 134, fourth column lamp bead assembly; 140, main lamp bead; 150, auxiliary lamp bead; 151, first auxiliary lamp bead; 152, second auxiliary lamp bead; 153, third auxiliary lamp bead; 154, fourth auxiliary lamp bead; 160, seam; 200, display panel. DETAILED DESCRIPTION

[0027] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0028] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] Figure 1 is a schematic diagram of the structure of the first light board and the second light board of the backlight module of the present application, Figure 2 yes Figure 1Schematic diagram of the local enlarged structure of area A in the middle, combined with Figure 1-2 It can be seen that the present application discloses a backlight module 100, including a first lamp board 110 and a second lamp board 120, the first lamp board 110 and the second lamp board 120 are spliced ​​together by a seam 160, the area of ​​the first lamp board 110 close to the second lamp board 120 is a first adjacent seam area 111, the area of ​​the second light board 120 close to the first light board 110 is a second adjacent seam area 121, the first adjacent seam area 111 and the second adjacent seam area 121 are both provided with a plurality of lamp bead assemblies 130; the lamp bead assemblies 130 include main lamp beads 140 and auxiliary lamp beads 150, the auxiliary lamp beads 150 are arranged on one side of the main lamp beads 140, and the light output brightness of the auxiliary lamp beads 150 toward the seam 160 is greater than the light output brightness away from the seam 160.

[0030] Compared with the prior art that when LED is used as a backlight source, there will be shadows at the joints of the light boards, which makes the overall viewing experience poor. The backlight module 100 of the present application includes a first light board 110 and a second light board 120. The first light board 110 and the second light board 120 are spliced ​​together by a seam 160. The area of ​​the first light board 110 close to the second light board 120 is a first adjacent seam area 111, and the area of ​​the second light board 120 close to the first light board 110 is a second adjacent seam area 121. The first adjacent seam area 111 and the second adjacent seam area 121 are both provided with multiple A lamp bead assembly 130; the lamp bead assembly 130 includes a main lamp bead 140 and an auxiliary lamp bead 150, the auxiliary lamp bead 150 is arranged on one side of the main lamp bead 140, and the brightness of the light emitted by the auxiliary lamp bead 150 toward the joint 160 is greater than the brightness of the light emitted away from the joint 160; in this way, most of the light emitted by the auxiliary lamp bead 150 is directed toward the joint 160, that is, the joint 160 can be filled with light by the auxiliary lamp bead 150, and the auxiliary lamp bead 150 cooperates with the main lamp bead 140 to make the light at the joint 160 relatively full, thereby improving the problem of shadows at the joint 160.

[0031] Figure 3 is a block diagram of the display device of the present application, such as Figure 3 As shown, the present application also discloses a display device 10, including a display panel 200 and the backlight module 100 as described above, wherein the display panel 200 is arranged opposite to the backlight module 100, and the backlight module 100 provides a backlight source for the display panel 200. The display device 10 assembled with the backlight module 100 can improve the problem of dark lines between the spliced ​​light panels of the backlight module 100, thereby improving the display quality. The display device 10 can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0032] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0033] First embodiment:

[0034] like Figure 1 As shown, in the backlight module 100, the plurality of lamp bead assemblies 130 include a first column of lamp bead assemblies 131 and a second column of lamp bead assemblies 132. The first column of lamp bead assemblies 131 are arranged on the side of the first adjacent seam area 111 close to the seam 160, and the second column of lamp bead assemblies 132 are arranged on the side of the second adjacent seam area 121 close to the seam 160. Under normal circumstances, from the cross-section of the lamp bead, the light-emitting surface of the lamp bead will be a fan-shaped structure from 0°-180°. Therefore, the light-emitting surface of each lamp bead will have a central axis of light. In the present application, in each column of the lamp bead assemblies 130, the central axis of the light-emitting surface of the auxiliary lamp bead 150 is biased toward the seam 160, so that the light-emitting surface of the auxiliary lamp bead 150 is biased toward the seam 160, thereby achieving fill light for the seam 160.

[0035] Figure 4 This is a schematic diagram of the light-emitting structure of the auxiliary lamp bead provided in the first embodiment of the present application. As shown in the figure, a in the figure represents the angle between the light-emitting surface of the auxiliary lamp bead 150 and the horizontal line, and the angle of the angle is 5-15°.

[0036] Of course, the auxiliary lamp bead 150 may also include two light-emitting surfaces, wherein the light-emitting brightness of the light-emitting surface close to the joint 160 is greater than the brightness of the light-emitting surface far from the joint 160. Such a design is also acceptable.

[0037] In order to make the light more uniform, the auxiliary lamp bead 150 includes a first auxiliary lamp bead 151, a second auxiliary lamp bead 152, a third auxiliary lamp bead 153 and a fourth auxiliary lamp bead 154, which are respectively arranged at the four corners of the main lamp bead 140. The third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 are arranged opposite to each other and are arranged on the side of the main lamp bead 140 close to the joint 160; the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 are arranged opposite to each other and are arranged on the side of the main lamp bead 140 away from the joint 160.

[0038] In the first light board 110, except for the first adjacent seam area 111 where the lamp bead assembly 130 is arranged, the other areas are normally arranged with separate main lamp beads 140, and each main lamp bead 140 is evenly spaced, that is, on the entire first light board 110, there are multiple original main lamp beads 140 evenly spaced, and the distance between every two adjacent main lamp beads 140 is 1.5mm-3mm. In this way, a denser lamp bead can be formed on the entire light board, which can ensure the brightness of the entire display.

[0039] In the lamp bead assembly 130, the diameter of the main lamp bead 140 is larger than the diameter of the auxiliary lamp bead 150, wherein the size of the main lamp bead 140 can be 10㎜*10㎜, and the size of the auxiliary lamp bead 150 can be 5㎜*5㎜, that is, the size of the auxiliary lamp bead 150 is half the size of the main lamp bead 140. At this time, the distance between the auxiliary lamp bead 150 and the main lamp bead 140 is also set to 1.5㎜-3㎜, so that the distance between the auxiliary lamp bead 150 and the two adjacent main lamp beads 140 is equal. The auxiliary lamp bead 150 in the first lamp bead assembly 130, the two adjacent main lamp beads 140 and the auxiliary lamp bead 150 in the second lamp bead assembly 130, the four lamp beads 150 can be connected to form a square, and the entire light-emitting area is fuller.

[0040] Since the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 are far away from the joint 160 , at this time, the light emission angles of the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 are smaller than the light emission angles of the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 .

[0041] Since the distance between the first auxiliary lamp bead 151 and the third auxiliary lamp bead 153 is greater than the distance between the first auxiliary lamp bead 151 and the main lamp bead 140 or the distance between the third auxiliary lamp bead 153 and the main lamp bead 140, and the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead are respectively spaced apart from the joint 160, the light emitting angle of the auxiliary lamp bead 150 close to the joint 160 needs to be designed to be larger, and most of the light emitted by the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 can be directly supplemented to the joint 160, while the first auxiliary lamp bead 151 and the main lamp bead 140 are spaced apart from each other. The lamp bead 151 and the second auxiliary lamp bead 152 are far away from the joint 160. If more light emitted by the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 is to reach the joint 160, it is necessary to reduce the light-emitting angle of the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152, so that the light-emitting angle is matched with the distance from the auxiliary lamp bead 150 to the joint 160, so that the light emitted by the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 can also be supplemented to the joint 160, so as to increase the brightness at the joint 160 and improve the problem of dark lines. Preferably, the light-emitting angle of the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 is 10°, and the light-emitting angle of the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 is 15°. At this time, with the distance from the main lamp bead 140 and the distance between the auxiliary lamp bead 150 and the joint 160, a better effect is achieved.

[0042] For better control, the backlight module 100 also includes a light board controller, a first control circuit, a second control circuit and a third control circuit. The light board controller, the first control circuit, the second control circuit and the third control circuit are all arranged on the first light board 110 or the second light board 120. The main lamp bead 140 is connected to the light board controller through the first control circuit, the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 are connected to the light board controller through the second control circuit, and the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 are connected to the light board controller through the third control circuit. In this way, the main lamp bead 140 and the auxiliary lamp bead 150 can be separately controlled, which is more convenient.

[0043] Moreover, the brightness of the lamp beads can also be controlled and adjusted through the lamp board controller and the control circuit, which can be specifically designed according to the working current of the main lamp beads 140 and the auxiliary lamp beads 150. In order to save costs, it is also possible to set only one auxiliary lamp bead 150 on the left and right sides of the main lamp bead 140 in the first adjacent seam area 111 and the second adjacent seam area 121, and the specific light emitting angle is designed according to the situation.

[0044] The light-emitting surface and light-emitting angle of the auxiliary lamp bead 150 can be designed by dispensing glue, and the dispensing material is an organic compound. One method is: when dispensing glue, the packaging glue can be applied to the corresponding position on the auxiliary lamp bead 150. According to the distance between the auxiliary lamp bead 150 and the joint 160, and the light-emitting direction of the auxiliary lamp bead 150, the packaging glue can be applied relatively thicker on the auxiliary lamp bead 150 surface that does not need to emit light, and the light-emitting surface that needs to emit light can be relatively thin or not dispensed with glue, so that the required light-emitting surface can emit light normally; another method is: a shading design can be made on the light-emitting surface of the auxiliary lamp bead 150 that does not need to emit light, and the size of the area that needs to be shading can be designed according to the distance from the joint 160, so as to achieve the light-emitting angle of the auxiliary lamp bead 150 light-emitting surface. The above designs can be adjusted during use.

[0045] Second embodiment:

[0046] Figure 5 : is a schematic diagram of the structure of the lamp bead assembly provided in the second embodiment of the present application. Figure 5 As shown, as the second embodiment of the present application, this embodiment is different from the first embodiment in that the first auxiliary lamp bead 151 and the second auxiliary lamp bead 152 are arranged in parallel and above the main lamp bead 140; the third auxiliary lamp bead 153 and the fourth auxiliary lamp bead 154 are arranged in parallel and below the main lamp bead 140.

[0047] Due to the existence of the seam 160, part of the light emitted by the main lamp beads 140 in the first adjacent seam area 111 and the second adjacent seam area 121 is leaked from the seam 160, so that except for the seam 160, the brightness of the first adjacent seam area 111 and the second adjacent seam area 121 will be relatively darker than the brightness of other areas. At this time, auxiliary lamp beads 150 are arranged in the upper and lower directions of the main lamp beads 140, and the distance between the two parallel auxiliary lamp beads 150 becomes relatively smaller. At this time, the auxiliary lamp beads 150 are arranged densely, and the light of the auxiliary lamp beads 150 can simultaneously supply the seam 160, the first adjacent seam area 111 and the second adjacent seam area 121, so that the brightness of these areas is improved and becomes more uniform.

[0048] Third embodiment:

[0049] Figure 6 is a schematic diagram of the structure of the first light board and the second light board provided in the third embodiment of the present application, such as Figure 6 As shown, as the third embodiment of the present application, this embodiment is different from the first and second embodiments in that the first lamp panel 110 further includes a third adjacent seam area 112 and a fourth adjacent seam area 122, the third adjacent seam area 112 is located on the side of the first adjacent seam area 111 away from the second adjacent seam area 121, and the fourth adjacent seam area 122 is located on the side of the second adjacent seam area 121 away from the first adjacent seam area 111; the plurality of lamp bead assemblies 130 further include a third row of lamp bead assemblies 133 and a fourth column of lamp bead assemblies 134, the third column of lamp bead assemblies 133 are arranged in the third adjacent seam area 112, and the fourth column of lamp bead assemblies 134 are arranged in the fourth adjacent seam area 122; the luminous angle of the auxiliary lamp bead 150 of the first column of lamp bead assemblies 131 is greater than the luminous angle of the auxiliary lamp bead 150 of the third column of lamp bead assemblies 133; the luminous angle of the auxiliary lamp bead 150 of the second column of lamp bead assemblies 132 is greater than the luminous angle of the auxiliary lamp bead 150 of the fourth column of lamp bead assemblies 134.

[0050] In this way, the light can be better supplemented to the joint 160, the first adjacent joint area 111 and the second adjacent joint area 121, so that the brightness of the entire light board is uniform, thereby ensuring the display effect.

[0051] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0052] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A backlight module, comprising a first light board and a second light board, wherein the first light board and the second light board are connected by seams, an area of ​​the first light board close to the second light board is a first adjacent seam area, an area of ​​the second light board close to the first light board is a second adjacent seam area, and a plurality of lamp bead assemblies are arranged in the first adjacent seam area and the second adjacent seam area; characterized in that: The lamp bead assembly comprises a main lamp bead and an auxiliary lamp bead, wherein the auxiliary lamp bead is arranged on one side of the main lamp bead, and the light brightness of the auxiliary lamp bead toward the joint is greater than the light brightness away from the joint; Wherein, by applying packaging glue at corresponding positions on the auxiliary lamp beads, according to the distance between the auxiliary lamp beads and the joints, and the light emission direction of the auxiliary lamp beads, the packaging glue can be applied relatively thicker on the light emission surface of the auxiliary lamp beads that do not need to emit light, while the light emission surface of the auxiliary lamp beads that need to emit light can be applied relatively thinly or without glue, so that the light emission brightness of the auxiliary lamp beads toward the joints is greater than the light emission brightness away from the joints; or By providing a shading design on the light-emitting surface of the auxiliary lamp bead that does not need to emit light, it can be achieved that the brightness of the light emitted by the auxiliary lamp bead toward the joint is greater than the brightness of the light emitted away from the joint.

2. The backlight module according to claim 1, characterized in that: The plurality of lamp bead assemblies include a first row of lamp bead assemblies and a second row of lamp bead assemblies, wherein the first row of lamp bead assemblies is arranged on a side of the first adjacent seam area close to the seam, and the second row of lamp bead assemblies is arranged on a side of the second adjacent seam area close to the seam; Wherein, in each row of the lamp bead assemblies, the central axis of the light-emitting surface of the auxiliary lamp bead is biased toward the joint.

3. The backlight module according to claim 2, characterized in that: The light-emitting surface of the auxiliary lamp bead forms an angle with the horizontal line, and the angle of the angle is 5-15°.

4. The backlight module according to claim 2, characterized in that: The auxiliary lamp beads include a first auxiliary lamp bead, a second auxiliary lamp bead, a third auxiliary lamp bead and a fourth auxiliary lamp bead, and the first auxiliary lamp bead, the second auxiliary lamp bead, the third auxiliary lamp bead and the fourth auxiliary lamp bead are respectively arranged in the peripheral area of ​​the main lamp bead.

5. The backlight module according to claim 4, characterized in that: The first auxiliary lamp bead, the second auxiliary lamp bead, the third auxiliary lamp bead and the fourth auxiliary lamp bead are respectively arranged corresponding to the four corners of the main lamp bead; the third auxiliary lamp bead and the fourth auxiliary lamp bead are arranged opposite to each other and are arranged on a side of the main lamp bead close to the joint; The first auxiliary lamp bead and the second auxiliary lamp bead are arranged opposite to each other and are arranged on a side of the main lamp bead away from the joint, and the light emission angles of the third auxiliary lamp bead and the fourth auxiliary lamp bead are greater than the light emission angles of the first auxiliary lamp bead and the second auxiliary lamp bead; The backlight module also includes a light board controller, a first control circuit, a second control circuit and a third control circuit. The light board controller, the first control circuit, the second control circuit and the third control circuit are all arranged on the first light board or the second light board. The main lamp bead is connected to the light board controller through the first control circuit, the first auxiliary lamp bead and the second auxiliary lamp bead are connected to the light board controller through the second control circuit, and the third auxiliary lamp bead and the fourth auxiliary lamp bead are connected to the light board controller through the third control circuit.

6. The backlight module according to claim 5, characterized in that: The distance between the auxiliary lamp beads and the main lamp beads is equal to the distance between every two main lamp beads arranged at intervals.

7. The backlight module according to claim 6, characterized in that: The diameter of the main lamp bead is greater than the diameter of the auxiliary lamp bead.

8. The backlight module according to claim 1, characterized in that: The auxiliary lamp beads include a first auxiliary lamp bead, a second auxiliary lamp bead, a third auxiliary lamp bead and a fourth auxiliary lamp bead. The first auxiliary lamp bead and the second auxiliary lamp bead are arranged in parallel and above the main lamp bead; the third auxiliary lamp bead and the fourth auxiliary lamp bead are arranged in parallel and below the main lamp bead.

9. The backlight module according to claim 2, characterized in that: The first light panel further comprises a third adjacent seam area and a fourth adjacent seam area, the third adjacent seam area is located on a side of the first adjacent seam area away from the second adjacent seam area, and the fourth adjacent seam area is located on a side of the second adjacent seam area away from the first adjacent seam area; The plurality of lamp bead assemblies further include a third column of lamp bead assemblies and a fourth column of lamp bead assemblies, wherein the third column of lamp bead assemblies are arranged in the third adjacent seam area, and the fourth column of lamp bead assemblies are arranged in the fourth adjacent seam area; The light-emitting angle of the auxiliary lamp beads of the first column of lamp bead assemblies is greater than the light-emitting angle of the auxiliary lamp beads of the third column of lamp bead assemblies; the light-emitting angle of the auxiliary lamp beads of the second column of lamp bead assemblies is greater than the light-emitting angle of the auxiliary lamp beads of the fourth column of lamp bead assemblies.

10. A display device, characterized in that: It comprises a display panel and a backlight module as claimed in any one of claims 1 to 9, wherein the display panel and the backlight module are arranged opposite to each other, and the backlight module provides a backlight source for the display panel.

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