Light bar and preparation method thereof, backlight module and display device

Abstract

The invention provides a light bar and a preparation method thereof, a backlight module and a display device, and relates to the technical field of display, the backlight module comprises at least one first area, at least one second area and a splicing area located between the first area and the second area; the first area comprises a plurality of first light bars arranged in the first direction, the second area comprises a plurality of second light bars arranged in the second direction, and the first direction is opposite to the second direction; the splicing area comprises a splicing assembly; wherein each of the first lamp strip and the second lamp strip comprises an extension part and a bending part which are connected, the extension direction of the extension part is intersected with the extension direction of the bending part, and the extension direction of the bending part of the first lamp strip is opposite to the extension direction of the bending part of the second lamp strip; and the bent part of the first light bar and the bent part of the second light bar are electrically connected together through a splicing assembly. The backlight module can be provided with the light-emitting devices with high distribution density, and the distance between every two adjacent light-emitting devices is not limited.

Description

Light bar and preparation method thereof, backlight module and display device Technical Field

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

[0002] With the rapid development of various display technologies, customers are increasingly demanding higher performance from backlight modules. In related technologies, backlight modules are often assembled from multiple light bars. However, due to the size of the adapter plate between adjacent light bars, the spacing between adjacent light-emitting devices in the assembled backlight module is relatively large. Under the same conditions, a backlight module assembled from multiple light bars cannot achieve a high distribution density of light-emitting devices, making it difficult to improve the overall brightness and brightness distribution uniformity of the backlight module.

[0003] Summary of the Invention

[0004] The embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a backlight module, the backlight module comprising at least one first area, at least one second area, and a splicing area between the first area and the second area;

[0006] The first area includes a plurality of first light strips arranged along a first direction, the second area includes a plurality of second light strips arranged along a second direction, the first direction and the second direction are opposite; the splicing area includes a splicing assembly;

[0007] Wherein, the first light bar and the second light bar both include a connected extension portion and a bending portion, the extension direction of the extension portion intersects with the extension direction of the bending portion, the extension direction of the bending portion of the first light bar is opposite to the extension direction of the bending portion of the second light bar, and a plurality of light-emitting devices are arranged on the extension portion, and the bending portion of the first light bar and the bending portion of the second light bar are respectively electrically connected to the splicing assembly.

[0008] In the backlight module provided in at least one embodiment of the present application, the angle between the extension direction of the extension portion of the first light bar and the extension direction of the bent portion is a first angle, the angle between the extension direction of the extension portion of the second light bar and the extension direction of the bent portion is a second angle, the first angle and the second angle are equal, and the openings of the first angle and the second angle are in opposite directions.

[0009] In the backlight module provided in at least one embodiment of the present application, both the first angle and the second angle are acute angles or right angles.

[0010] In the backlight module provided in at least one embodiment of the present application, the splicing assembly includes an adapter plate, a plurality of first connectors, and a plurality of second connectors;

[0011] The plurality of first connectors and the plurality of second connectors are electrically connected to the adapter board respectively, the bent portion of the first light bar is electrically connected to the first connector, and the bent portion of the second light bar is electrically connected to the second connector;

[0012] Wherein, the extending direction of the adapter plate is parallel to the extending direction of the bending portion.

[0013] In the backlight module provided by at least one embodiment of the present application, in the nth row of light strips of the backlight module, along the extension direction of the adapter plate, the distance between the first connector electrically connected to the nth row of the first light strips and the second connector electrically connected to the nth row of the second light strips is greater than the distance between the first connector electrically connected to the nth row of the first light strips and the second connector electrically connected to the n+1th row of the second light strips, where n is a positive integer.

[0014] In the backlight module provided in at least one embodiment of the present application, the minimum distance between the side of the first connector away from the adapter plate and the side of the second connector away from the adapter plate along the extension direction perpendicular to the adapter plate is less than or equal to the sum of the size of the first connector along the extension direction perpendicular to the adapter plate and the size of the second connector along the extension direction perpendicular to the adapter plate.

[0015] In the backlight module provided in at least one embodiment of the present application, the extending portion of the first light bar and the extending portion of the second light bar have the same extending direction, and a plurality of light-emitting devices are arranged in the same row on the extending portions;

[0016] In the nth row of light strips of the backlight module, a line connecting geometric centers of the plurality of light emitting devices on the extension of the first light strip is collinear with a line connecting geometric centers of the plurality of light emitting devices on the extension of the second light strip, and n is a positive integer.

[0017] In the backlight module provided in at least one embodiment of the present application, the distance between two adjacent extension portions along the extension direction of the adapter plate is greater than the sum of the dimensions of the first connector and the second connector along the extension direction of the adapter plate.

[0018] In the backlight module provided in at least one embodiment of the present application, the minimum distance between the geometric center of the light-emitting device and the edge of the extension portion close to the adapter plate is greater than or equal to 1 mm.

[0019] In the backlight module provided in at least one embodiment of the present application, on the same light bar, along the extension direction of the bent portion, the minimum distance between the geometric center of the light-emitting device and the connector is greater than or equal to 2.5 mm.

[0020] In the backlight module provided in at least one embodiment of the present application, along the extension direction of the adapter plate, the distance between the first connector electrically connected to the nth row of the first light bar and the second connector electrically connected to the n+1th row of the second light bar is in the range of 0.25mm to 0.75mm.

[0021] In the backlight module provided in at least one embodiment of the present application, the first light bar and the second light bar are the same; the light-emitting devices on the first light bar and the second light bar are both sub-millimeter light-emitting diodes or micro light-emitting diodes.

[0022] In a second aspect, an embodiment of the present application provides a light bar, which is applied to the backlight module described in the first aspect, and the light bar includes a connected extension portion and a bending portion, and the extension direction of the extension portion intersects with the extension direction of the bending portion.

[0023] In the light bar provided in at least one embodiment of the present application, an angle between an extending direction of the extending portion and an extending direction of the bent portion is an acute angle.

[0024] In the light bar provided in at least one embodiment of the present application, the angle between the extending direction of the extending portion and the extending direction of the bent portion is a right angle, and the light bar is an L-shaped light bar.

[0025] In a third aspect, an embodiment of the present application provides a method for preparing a light bar, wherein the method is applied to prepare the light bar as described in any one of the second aspects, and the method includes:

[0026] Provide driver motherboard;

[0027] A plurality of light emitting devices arranged in an array are formed on the driving motherboard;

[0028] Performing a first cutting operation to cut the driving motherboard into a plurality of parallelogram-shaped intermediate substrates;

[0029] Perform a second cutting to cut the parallelogram-shaped intermediate substrate into a first light bar and a second light bar; wherein the first light bar and the second light bar both include a connected extension portion and a bent portion, and an extension direction of the extension portion intersects with an extension direction of the bent portion.

[0030] In a fourth aspect, an embodiment of the present application provides a display device comprising the backlight module as described in the first aspect.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.

[0033] FIG1 is a schematic top view of a backlight module in a related art according to an embodiment of the present application;

[0034] FIG2 is an enlarged schematic diagram of a local structure of FIG1 ;

[0035] FIG3 is a schematic top view of a backlight module provided in an embodiment of the present application;

[0036] FIG4 is an enlarged schematic diagram of a partial structure of FIG3 ;

[0037] FIG5 is a schematic top view of another backlight module provided in an embodiment of the present application;

[0038] FIG6 and FIG7 are schematic structural diagrams of two light bars provided in embodiments of the present application;

[0039] FIG8 and FIG9 are schematic diagrams of intermediate structures during a manufacturing process of a light bar provided in an embodiment of the present application. Specific embodiments

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] In the embodiments of the present application, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0042] In the embodiments of the present application, the terms "upper" and "lower" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Throughout the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present application. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any suitable manner.

[0044] In the embodiments of the present application, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0045] The features "parallel," "perpendicular," and "identical" used in the embodiments of the present application include features such as "parallel," "perpendicular," and "identical" in the strict sense, as well as "approximately parallel," "approximately perpendicular," and "approximately identical" that include certain tolerances, taking into account the measurement and tolerances associated with the measurement of a particular quantity (e.g., limitations of the measurement system), and represent within an acceptable range of deviation for a particular value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the stated value.

[0046] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0047] In the embodiments of this application, "same layer" refers to the relationship between multiple film layers formed from the same material after the same step (e.g., a one-step patterning process). "Same layer" here does not always mean that the thickness of multiple film layers is the same or the height of multiple film layers in the cross-sectional view is the same. Polygons in this specification are not strictly defined and can be approximate triangles, parallelograms, trapezoids, pentagons, or hexagons, etc., and some small deformations due to tolerances may exist.

[0048] The backlight module in the related art usually includes a light bar, an adapter plate and a connector. As shown in FIG1 , a plurality of light bars and an adapter plate can be assembled together through a connector; wherein, a plurality of light-emitting devices (LEDs) are provided on the light bar. However, for the backlight module assembled by this scheme, the minimum spacing between two adjacent light-emitting devices is limited by the size of the adapter plate and the connector. For example, as shown in FIG2 , the minimum spacing between two adjacent light-emitting devices is Pitch = 2D + 2L + G. Exemplarily, when L = 14.95 mm, D = 2.50 mm, and G = 5.0 mm, Pitch = 39.9 mm. The above-mentioned spacing G is the wiring space reserved on the adapter plate, and the spacing D is the space reserved to prevent the connector from blocking the light of the light-emitting device.

[0049] Based on this, the embodiments of the present application provide a light strip and a preparation method thereof, a backlight module and a display device, the backlight module including at least one first area, at least one second area, and a splicing area located between the first area and the second area; the first area includes a plurality of first light strips arranged along a first direction, the second area includes a plurality of second light strips arranged along a second direction, and the first direction and the second direction are opposite; the splicing area includes a splicing assembly; wherein the first light bar and the second light bar both include a connected extension portion and a bending portion, the extension direction of the extension portion and the extension direction of the bending portion intersect, the extension direction of the bending portion of the first light bar and the extension direction of the bending portion of the second light bar are opposite, a plurality of light-emitting devices are arranged on the extension portion, and the bending portion of the first light bar and the bending portion of the second light bar are electrically connected together through the splicing assembly.

[0050] In this way, by arranging the first light bar and the second light bar to include a connected extension portion and a bent portion, the extension direction of the extension portion and the extension direction of the bent portion intersect, and the extension direction of the bent portion of the first light bar is opposite to the extension direction of the bent portion of the second light bar. Since the light-emitting device is arranged on the extension portion, and the bent portion of the first light bar and the bent portion of the second light bar are electrically connected together through a splicing assembly, the degree to which the size of the splicing assembly restricts the minimum spacing between the light-emitting devices on the first light bar and the second light bar is reduced, thereby greatly reducing the minimum spacing between two adjacent light-emitting devices in the backlight module.

[0051] It should be noted that in actual applications, in the same backlight module, the spacing between any two adjacent light-emitting devices along the same direction is roughly the same. Usually, since it is difficult to adjust the minimum spacing between two light-emitting devices on two adjacent light strips spliced ​​together, the spacing between two adjacent light-emitting devices on the same light strip can be designed based on the minimum spacing between the two light-emitting devices on the two adjacent light strips.

[0052] The light bar and its preparation method, backlight module and display device provided in the embodiments of the present application will be specifically introduced and explained below with reference to the accompanying drawings.

[0053] 3 , 4 and 5 , an embodiment of the present application provides a backlight module, wherein the backlight module includes at least one first area A1 , at least one second area A2 , and a splicing area B between the first area A1 and the second area A2 ;

[0054] The first area A1 includes a plurality of first light bars L1 arranged along a first direction (for example, the direction O1O2), and the second area A2 includes a plurality of second light bars L2 arranged along a second direction (for example, the direction O2O1). The first direction and the second direction are opposite; the splicing area B includes splicing components (including Z1, C1 and C2);

[0055] Among them, the first light bar L1 and the second light bar L2 both include a connected extension portion (L1-Y or L2-Y) and a bending portion (L1-W or L2-W), the extension direction of the extension portion L1-Y intersects with the extension direction of the bending portion L1-W, the extension direction of the extension portion L2-Y intersects with the extension direction of the bending portion L2-W, the extension direction of the bending portion L1-W of the first light bar L1 is opposite to the extension direction of the bending portion L2-W of the second light bar L2, a plurality of light-emitting devices Q are arranged on the extension portion (L1-Y or L2-Y), and the bending portion L1-W of the first light bar L1 and the bending portion L2-W of the second light bar L2 are respectively electrically connected to the splicing assembly.

[0056] In an exemplary embodiment, the backlight module may include a first area A1, a spliced ​​area B, a second area A2, a spliced ​​area B, and a first area A1, which are sequentially arranged; or the backlight module may include a first area A1, a spliced ​​area B, a second area A2, a spliced ​​area B, a first area A1, a spliced ​​area B, and a second area A2, which are sequentially arranged. The drawings provided in the embodiments of this application are drawn using the example of a backlight module including a first area A1, a spliced ​​area B, and a second area A2, which are sequentially arranged.

[0057] The number of the splicing areas B is determined according to the number of the first areas A1 and the second areas A2.

[0058] It should be noted that a light bar refers to a substrate with a fixed aspect ratio and at least one light-emitting device mounted on it. The planar shape of the light bar includes a strip (strip) or a combination of a strip and other shapes, including but not limited to polygons and arcs. The combination of a strip and other shapes includes splicing other shapes onto the strip or removing a partial area from the strip.

[0059] In an exemplary embodiment, the number of first light strips L1 included in the first area A1 and the number of second light strips L2 included in the second area A2 are the same. In other words, the number of first light strips L1 included in the first area A1 corresponds to the number of second light strips L2 included in the second area A2 one by one, so that after the first area A1 and the second area A2 are spliced ​​together, the light-emitting devices Q in the first light strip L1 and the light-emitting devices Q in the second light strip L2 can be arranged side by side, which is conducive to the uniform distribution of multiple light-emitting devices Q in the backlight module.

[0060] The specific components included in the above-mentioned splicing assembly are not limited here. In an exemplary embodiment, the splicing assembly includes an adapter plate Z1, a first connector C1, and a second connector C2; wherein the first connector C1 is respectively connected to the first light bar L1 and the adapter plate Z1, and the second connector C2 is respectively connected to the second light bar L2 and the adapter plate Z1.

[0061] In some embodiments, a light bar is connected to the adapter plate Z1 via at least one connector. The number of connectors corresponding to a light bar depends on the size of the light bar, the arrangement of the circuits on the light bar, and the type and number of signals transmitted between the light bar and the adapter plate Z1. In the embodiments of this application, a light bar is connected to the adapter plate Z1 via a single adapter.

[0062] The planar shape of the extension portion (L1-Y or L2-Y) is not limited herein. Exemplarily, the planar shape of the extension portion includes a bar shape, wherein the bar shape may include a parallelogram or a rectangle. The extension direction of the extension portion (L1-Y or L2-Y) intersects the first direction, and the extension direction of the extension portion (L1-Y or L2-Y) intersects the second direction.

[0063] The above-mentioned bending portion (L1-W or L2-W) refers to the portion of the light bar that has an angle with the extension direction of the extension portion (L1-Y or L2-Y). Relative to the extension portion (L1-Y or L2-Y), the bending portion (L1-W or L2-W) has a certain bending angle.

[0064] The intersection of the extension direction of the above-mentioned extension portion (L1-Y or L2-Y) and the extension direction of the bending portion (L1-W or L2-W) means that there is an angle between the extension direction of the extension portion (L1-Y or L2-Y) and the extension direction of the bending portion (L1-W or L2-W).

[0065] The angle between the extending portion L1 -Y and the bent portion L1 -W of the first light bar L1 is not limited here and can be determined according to the design.

[0066] The angle between the extending portion L2 -Y and the bent portion L2 -W of the second light bar L2 is not limited here and can be determined according to the design.

[0067] The first direction and the second direction are opposite, and the extension direction of the bending portion L1-W of the first light bar L1 and the extension direction of the bending portion L2-W of the second light bar L2 are opposite. "Opposite" means parallel and pointing in opposite directions.

[0068] The arrangement of the multiple light-emitting devices Q provided on the extension portion (L1-Y or L2-Y) is not limited herein; illustratively, the extension portion (L1-Y or L2-Y) may be provided with a single row of light-emitting devices Q; or, alternatively, the extension portion (L1-Y or L2-Y) may be provided with multiple rows of light-emitting devices Q. The spacing between two adjacent light-emitting devices Q on the same extension portion is substantially equal.

[0069] In addition, it should be noted that the arrangement of the multiple light-emitting devices Q on the extension L1-Y of the first light bar L1 is the same as the arrangement of the multiple light-emitting devices Q on the extension L2-Y of the second light bar L2. This can help ensure that the spacing between any two adjacent light-emitting devices Q along the same direction in the backlight module formed by splicing multiple light bars together is roughly equal, which is conducive to uniform light output from the backlight module and improves the quality of the backlight module.

[0070] In the embodiment of the present application, as shown in Figures 3, 4 and 5, the first light bar L1 and the second light bar L2 are both provided with an extension portion (L1-Y or L2-Y) and a bending portion (L1-W or L2-W) connected to each other, the extension direction of the extension portion (L1-Y or L2-Y) and the extension direction of the bending portion (L1-W or L2-W) intersect, the extension direction of the bending portion L1-W of the first light bar L1 and the extension direction of the bending portion L2-W of the second light bar L2 are opposite, and since the light emitting device is provided in the extension portion (L1-Y or L2-Y), and the bending portion L1-W of the first light bar L1 and the bending portion L2-W of the second light bar L2 are electrically connected together through a splicing component, which reduces the degree to which the size of the splicing component restricts the minimum spacing between the light-emitting devices Q on the first light bar L1 and the second light bar Q on the second light bar L2 (that is, the size of the splicing area B in the direction from the first area A1 to the second area A2 is reduced), thereby greatly reducing the minimum spacing between two adjacent light-emitting devices Q in the backlight module.

[0071] Among them, since it is difficult to adjust the minimum spacing between the two light-emitting devices Q on two adjacent light strips (L1 and L2) spliced ​​together, the spacing between two adjacent light-emitting devices Q on the same light strip can be designed according to the minimum spacing between the two light-emitting devices Q on the two adjacent light strips (L1 and L2).

[0072] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 3 or Figure 5, the angle between the extension direction of the extension portion L1-Y of the first light bar L1 and the extension direction of the bending portion L1-W is a first angle α, and the angle between the extension direction of the extension portion L2-Y of the second light bar L2 and the extension direction of the bending portion L2-W is a second angle β. The first angle α and the second angle β are equal, and the openings of the first angle α and the second angle β are in opposite directions.

[0073] In the backlight module provided by at least one embodiment of the present application, the first angle α and the second angle β are both acute angles or right angles.

[0074] Exemplarily, as shown in FIG3 , the first angle α and the second angle β are both right angles.

[0075] Exemplarily, as shown in FIG5 , the first angle α and the second angle β are both acute angles.

[0076] Exemplarily, when the first angle α and the second angle β are both acute angles, the acute angles may be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85° or 88°.

[0077] Regardless of whether the first angle α and the second angle β are acute angles or right angles, the extension direction of the joint area B between the first area A1 and the second area A2 is parallel to the extension direction of the bending portion (L1-W or L2-W).

[0078] In addition, the extension direction of the splicing assembly is parallel to the extension direction of the bending portion (L1-W or L2-W), so that the splicing assembly can be set in the splicing area B and the space in the splicing area B can be effectively utilized, thereby reducing the size of the splicing assembly in the direction from the first area A1 to the second area A2, thereby greatly reducing the size of the splicing area B in the direction from the first area A1 to the second area A2, thereby greatly reducing the minimum spacing between two adjacent light-emitting devices Q in the backlight module, and facilitating the preparation of a backlight module with a high distribution density of light-emitting devices Q.

[0079] In the backlight module provided in at least one embodiment of the present application, as shown in FIG3 to FIG5 , the splicing assembly includes an adapter plate Z1 , a plurality of first connectors C1 (Connector1 ) and a plurality of second connectors C2 (Connector2 );

[0080] Multiple first connectors C1 and multiple second connectors C2 are electrically connected to the adapter plate Z1 respectively, the bending portion L1-W of the first light bar L1 is electrically connected to the first connector C1, and the bending portion L2-W of the second light bar L2 is electrically connected to the second connector C2;

[0081] The extending direction of the adapter plate Z1 is parallel to the extending direction of the bent portions ( L1 -W and L2 -W).

[0082] In an exemplary embodiment, in order to achieve the same distribution density of light-emitting devices Q in the first area A1 and the second area A2 of the backlight module, the number of first connectors C1 can be set to be equal to an integer multiple of the number of first light bars L1, and the number of second connectors C2 can be set to be equal to an integer multiple of the number of second light bars L2. For example, the number of first light bars L1 in the first area A1 can be set to be the same as the number of second light bars L2 in the second area A2, and the number of first connectors C1 and second connectors C2 can be the same. For example, the number of first connectors C1 can be set to be the same as the number of first light bars L1, and the number of second connectors C2 can be set to be the same as the number of second light bars L2.

[0083] In an embodiment of the present application, the extension direction of the adapter plate Z1 is set to be parallel to the extension direction of the bending portion (L1-W and L2-W), and the bending portion L1-W of the first light bar L1 is set to be electrically connected to the first connector C1, and the bending portion L2-W of the second light bar L2 is electrically connected to the second connector C2; in this way, the distance between the side of the first connector C1 away from the adapter plate Z1 to the side of the second connector C2 away from the adapter plate Z1 along the direction from the first area A1 to the second area A2 is reduced, which limits the minimum spacing between the light-emitting devices Q on the first light bar L1 and the light-emitting devices Q on the second light bar L2, and reduces the size of the splicing area B along the direction from the first area A1 to the second area A2, thereby greatly reducing the minimum spacing between two adjacent light-emitting devices Q in the backlight module.

[0084] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 3 or Figure 5, in the nth row of light strips of the backlight module, along the extension direction of the adapter plate Z1 (for example, the O1O2 direction or the O2O1 direction), the distance between the first connector C1 electrically connected to the first light strip L1 in the nth row and the second connector C2 electrically connected to the second light strip L2 in the nth row is greater than the distance between the first connector C1 electrically connected to the first light strip L1 in the nth row and the second connector C2 electrically connected to the second light strip L2 in the n+1th row, where n is a positive integer.

[0085] Exemplarily, FIG4 shows a schematic diagram of the distribution dimensions of the first row (n=1) and the second row (n=2) of light strips in FIG3 , wherein, along the extension direction of the adapter plate Z1 (for example, the O1O2 direction or the O2O1 direction), the distance G3 between the first connector C1 electrically connected to the first light strip L1 in the first row and the second connector C2 electrically connected to the second light strip L2 in the first row is greater than the distance G2 between the first connector C1 electrically connected to the first light strip L1 in the first row and the second connector C2 electrically connected to the second light strip L2 in the second row.

[0086] Illustratively, along the extension direction of the adapter plate Z1 (for example, the O1O2 direction or the O2O1 direction), the distance G3 between the first connector C1 electrically connected to the second row of the first light bar L1 and the second connector C2 electrically connected to the second row of the second light bar L2 is greater than the distance G2 between the first connector C1 electrically connected to the second row of the first light bar L1 and the second connector C2 electrically connected to the third row of the second light bar L2.

[0087] In an exemplary embodiment, the first connector C1 electrically connected to the nth row first light bar L1 and the second connector C2 electrically connected to the nth row second light bar L2 may be disposed on different sides of the extension portion (L1-Y or L2-Y).

[0088] For example, in Figure 4, for the first connector C1 electrically connected to the first light strip L1 in the first row and the second connector C2 electrically connected to the second light strip L2 in the first row, the first connector C1 and the second connector C2 can be respectively arranged on the upper and lower sides of the extension portion (L1-Y or L2-Y). In this way, the distance between the side of the first connector C1 away from the adapter plate Z1 and the side of the second connector C2 away from the adapter plate Z1 along the direction from the first area A1 to the second area A2 is greatly reduced, and the degree to which this distance is restricted to the minimum spacing between the light-emitting device Q on the first light strip L1 and the light-emitting device Q on the second light strip L2 is reduced, thereby greatly reducing the minimum spacing between two adjacent light-emitting devices Q in the backlight module, which is conducive to preparing a backlight module with a high distribution density of light-emitting devices Q.

[0089] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 4, the minimum distance H between the side of the first connector C1 away from the adapter plate Z1 and the side of the second connector C2 away from the adapter plate Z1 along the extension direction perpendicular to the adapter plate Z1 is less than or equal to the sum of the dimension L of the first connector C1 along the extension direction perpendicular to the adapter plate Z1 and the dimension L of the second connector C2 along the extension direction perpendicular to the adapter plate Z1.

[0090] In an exemplary embodiment, the first connector C1 and the second connector C2 have the same structure and size.

[0091] In an exemplary embodiment, the minimum distance H between the side of the first connector C1 away from the adapter plate Z1 and the side of the second connector C2 away from the adapter plate Z1 along the extension direction perpendicular to the adapter plate Z1 is smaller than the sum of the dimension L of the first connector C1 along the extension direction perpendicular to the adapter plate Z1 and the dimension L of the second connector C2 along the extension direction perpendicular to the adapter plate Z1, that is, H<2L.

[0092] In an exemplary embodiment, the minimum distance H between the side of the first connector C1 away from the adapter plate Z1 and the side of the second connector C2 away from the adapter plate Z1 along the extension direction perpendicular to the adapter plate Z1 is equal to the sum of the dimension L of the first connector C1 along the extension direction perpendicular to the adapter plate Z1 and the dimension L of the second connector C2 along the extension direction perpendicular to the adapter plate Z1, that is, H=2L.

[0093] In the backlight module provided in the embodiments of the present application, by setting the minimum distance H between the side of the first connector C1 away from the adapter plate Z1 and the side of the second connector C2 away from the adapter plate Z1 along the extension direction perpendicular to the adapter plate Z1 to be less than or equal to the sum of the dimension L of the first connector C1 along the extension direction perpendicular to the adapter plate Z1 and the dimension L of the second connector C2 along the extension direction perpendicular to the adapter plate Z1; the dimension of the splicing area B along the direction from the first area A1 to the second area A2 can be greatly reduced, thereby greatly reducing the minimum spacing between two adjacent light-emitting devices Q in the backlight module.

[0094] In the backlight module provided by at least one embodiment of the present application, as shown in Figures 3 to 5, the extension direction of the extension portion L1-Y of the first light bar L1 and the extension portion L2-Y of the second light bar L2 are consistent, and a plurality of light-emitting devices Q are arranged in the same row on the extension portion L1-Y or L2-Y; in the nth row of light bars of the backlight module, the line connecting the geometric centers of the plurality of light-emitting devices Q on the extension portion L1-Y of the first light bar L1 and the line connecting the geometric centers of the plurality of light-emitting devices Q on the extension portion L2-Y of the second light bar L2 are collinear, and n is a positive integer.

[0095] Exemplarily, a row of light-emitting devices Q is arranged on the extension portion L1-Y of the first light bar L1, and a row of light-emitting devices Q is arranged on the extension portion L2-Y of the second light bar L2. In the nth row of light bars of the backlight module, the light-emitting devices Q on the extension portion L1-Y of the first light bar L1 and the light-emitting devices Q on the extension portion L2-Y of the second light bar L2 are arranged in the same row.

[0096] In the backlight module provided in at least one embodiment of the present application, the distance between two adjacent extension portions (two adjacent L1-Y or two adjacent L2-Y) along the extension direction of the adapter plate Z1 is greater than the sum of the dimensions of the first connector C1 and the second connector C2 along the extension direction of the adapter plate Z1.

[0097] For example, as shown in Figure 5, the spacing H2 between two adjacent extensions (two adjacent L1-Y or two adjacent L2-Y) along the extension direction of the adapter plate Z1 is greater than the sum of the dimensions of the first connector C1 and the second connector C2 along the extension direction of the adapter plate Z1, 2W. Figure 5 illustrates the example of the first connector C1 and the second connector C2 having the same dimensions W along the extension direction of the adapter plate Z1.

[0098] In the backlight module provided in at least one embodiment of the present application, as shown in FIG4 , the minimum distance D2 between the geometric center of the light-emitting device Q and the edge of the extension portion (L1-Y or L2-Y) close to the adapter plate Z1 is greater than or equal to 1 mm.

[0099] Exemplarily, as shown in FIG4 , for the first light bar L1 , the minimum distance D2 between the geometric center of the light emitting device Q on the first light bar L1 and the edge of the extension L1 -Y close to the adapter plate Z1 is greater than or equal to 1 mm.

[0100] For example, the minimum distance D2 between the geometric center of the light emitting device Q on the first light bar L1 and the edge of the extension portion L1 -Y close to the adapter plate Z1 is in the range of 1 mm to 7.5 mm.

[0101] Specifically, the minimum distance D2 between the geometric center of the light-emitting device Q on the first light bar L1 and the edge of the extension portion L1-Y close to the adapter plate Z1 can be 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm or 7.0mm.

[0102] Exemplarily, for the second light bar L2, a minimum distance D2 between the geometric center of the light emitting device Q on the second light bar L2 and the edge of the extension portion L2-Y close to the adapter plate Z1 is greater than or equal to 1 mm.

[0103] For example, the minimum distance D2 between the geometric center of the light emitting device Q on the second light bar L2 and the edge of the extension portion L2 -Y close to the adapter plate Z1 is in the range of 1 mm to 7.5 mm.

[0104] Exemplarily, the minimum distance D2 between the geometric center of the light-emitting device Q on the first light bar L1 and the edge of the extension portion L1-Y close to the adapter plate Z1 is approximately equal to the minimum distance D2 between the geometric center of the light-emitting device Q on the second light bar L2 and the edge of the extension portion L2-Y close to the adapter plate Z1.

[0105] Among them, the minimum distance D2 between the geometric center of the light-emitting device Q on the first light bar L1 and the edge of the extension part L1-Y close to the adapter plate Z1, or the minimum distance D2 between the geometric center of the light-emitting device Q on the second light bar L2 and the edge of the extension part L2-Y close to the adapter plate Z1; are both safe distances from the light-emitting device Q to the edge of the light bar, so as to avoid damage to the light-emitting device Q during the assembly process of the light bar and the adapter plate Z1, thereby reducing the preparation yield of the backlight module.

[0106] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 4, on the same light bar, along the extension direction of the bending portion (L1-W or L2-W), the minimum distance D1 between the geometric center of the light-emitting device Q and the connector (C1 or C2) is greater than or equal to 2.5 mm.

[0107] Exemplarily, on the same first light bar L1 , along the extending direction of the bend L1 -W, the minimum distance D1 between the geometric center of the light emitting device Q and the first connector C1 is greater than or equal to 2.5 mm.

[0108] Illustratively, on the same second light bar L2, along the extending direction of the bent portion L2-W, the minimum distance D1 between the geometric center of the light emitting device Q and the second connector C2 is greater than or equal to 2.5 mm.

[0109] For example, on the same light bar, along the extension direction of the bending portion (L1-W or L2-W), the minimum distance D1 between the geometric center of the light emitting device Q and the connector (C1 or C2) ranges from 2.5 mm to 10 mm.

[0110] For example, on the same light bar, along the extension direction of the bending portion (L1-W or L2-W), the minimum distance D1 between the geometric center of the light-emitting device Q and the connector (C1 or C2) can be 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm or 9.5mm.

[0111] Among them, the minimum distance D1 between the geometric center of the light-emitting device Q along the extension direction of the bending portion L2-W on the same second light strip L2 and the second connector C2 is approximately equal to the minimum distance D1 between the geometric center of the light-emitting device Q along the extension direction of the bending portion L1-W on the same first light strip L1 and the first connector C1.

[0112] In an embodiment of the present application, by being arranged on the same light bar, the minimum distance D1 between the geometric center of the light-emitting device Q and the connector (C1 or C2) along the extension direction of the bending portion (L1-W or L2-W) is greater than or equal to 2.5 mm, thereby avoiding the connector from blocking the light of the light-emitting device Q, thereby improving the light uniformity of the light-emitting device Q close to the splicing area B of the backlight module and the light-emitting device Q in other areas, and improving the display effect of the backlight module.

[0113] In the backlight module provided by at least one embodiment of the present application, as shown in FIG4 , along the extension direction of the adapter plate Z1, the distance G2 between the first connector C1 electrically connected to the first light bar L1 of the nth row and the second connector C2 electrically connected to the second light bar L2 of the n+1th row ranges from 0.25 mm to 0.75 mm.

[0114] Illustratively, the distance G2 may be 0.30 mm, 0.35 mm, 0.40 mm, 0.45 mm, 0.50 mm, 0.55 mm, 0.60 mm, 0.65 mm, or 0.70 mm.

[0115] In an exemplary embodiment, by setting the distance G2 between the first connector C1 electrically connected to the first light bar L1 in the nth row and the second connector C2 electrically connected to the second light bar L2 in the n+1th row to be in the range of 0.25mm to 0.75mm along the extension direction of the adapter plate Z1, on the one hand, it is possible to reserve routing space between the first connector C1 electrically connected to the first light bar L1 in the nth row and the second connector C2 electrically connected to the second light bar L2 in the n+1th row for the connector and the adapter plate Z1; on the other hand, it is possible to avoid an increased difficulty in the preparation process (the step of fixing the connector) due to the distance between the two connectors being too small, thereby improving the preparation yield of the back module.

[0116] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 4, the dimension D3 of the overlapping area between the connector and the adapter plate Z1 along the direction from the first area A1 to the second area A2 accounts for 30% to 50% of the dimension L of the connector itself along the direction from the first area A1 to the second area A2.

[0117] For example, when the dimension L of the connector itself from the first area A1 to the second area A2 is 19.5 mm, the dimension D3 of the overlapping area between the connector and the adapter plate Z1 from the first area A1 to the second area A2 can be set to 6.95 mm.

[0118] In the backlight module provided in at least one embodiment of the present application, as shown in Figure 4, in the partial area where the connector and the adapter plate Z1 overlap, the minimum distance D4 between the side edge of the overlapping connector and the adapter plate Z1 and the side edge of the adapter plate Z1 in the direction from the first area A1 to the second area A2 is in the range of 2.5 mm to 7.5 mm.

[0119] Illustratively, in the partial area where the first connector C1 and the adapter plate Z1 overlap, the minimum distance D4 between the overlapping side edges of the first connector C1 and the adapter plate Z1 and the side edges of the adapter plate Z1 in the direction from the first area A1 to the second area A2 ranges from 2.5 mm to 7.5 mm.

[0120] Illustratively, in the partial area where the second connector C2 and the adapter plate Z1 overlap, the minimum distance D4 between the side edge of the overlapping second connector C2 and the adapter plate Z1 and the side edge of the adapter plate Z1 in the direction from the first area A1 to the second area A2 ranges from 2.5 mm to 7.5 mm.

[0121] Specifically, D4 can be 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm or 7.0 mm.

[0122] Among them, by setting the partial area where the connector and the adapter board Z1 overlap, the minimum distance D4 between the side edge of the overlapping connector and the adapter board Z1 and the side edge of the adapter board Z1 in the direction from the first area A1 to the second area A2 is set to reserve design space for the routing between the connector and the adapter board Z1.

[0123] In the backlight module provided in at least one embodiment of the present application, as shown in FIG4 , the minimum distance Gap between the light bar and the adapter plate Z1 in the direction from the first area A1 to the second area A2 is in the range of 0 to 0.5 mm.

[0124] Exemplarily, the minimum distance Gap between the first light bar L1 and the adapter plate Z1 in the direction from the first area A1 to the second area A2 is in the range of 0 to 0.5 mm.

[0125] Exemplarily, a minimum distance Gap between the second light bar L2 and the adapter plate Z1 in a direction from the first area A1 to the second area A2 is in a range of 0 to 0.5 mm.

[0126] The minimum distance Gap between the first light bar L1 and the adapter plate Z1 along the direction from the first area A1 to the second area A2 is equal to the minimum distance Gap between the second light bar L2 and the adapter plate Z1 along the direction from the first area A1 to the second area A2.

[0127] Specifically, the minimum distance Gap between the light bar and the adapter plate Z1 in the direction from the first area A1 to the second area A2 may be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm or 0.45 mm.

[0128] In the backlight module provided in at least one embodiment of the present application, the first light bar L1 and the second light bar L2 are the same; the light-emitting devices Q on the first light bar L1 and the second light bar L2 are both sub-millimeter light-emitting diodes (Mini Light Emitting Diode, abbreviated as Mini LED in English) or micro light-emitting diodes (Micro Light Emitting Diode, abbreviated as Micro LED in English).

[0129] Exemplarily, each light strip includes at least one light zone. For each light zone, its state can be controlled individually, for example, a light zone can be controlled individually to be in a lit state or an off state; its brightness can also be controlled individually, for example, a light zone can be controlled individually to increase or decrease its brightness.

[0130] In an exemplary embodiment, each of the first light bar L1 and the second light bar L2 includes a first PCB substrate and a plurality of light emitting devices Q disposed on the first PCB substrate.

[0131] Exemplarily, the adapter plate Z1 may include a second PCB substrate.

[0132] Here, there is no limitation on whether the first PCB substrate and the second PCB substrate are of the same type.

[0133] For example, according to flexibility classification, PCB substrates can include rigid PCB substrates and flexible PCB substrates.

[0134] For example, according to the number of layers, PCB substrates can include single-sided boards, double-sided boards, and multi-layer boards.

[0135] For example, according to the classification of base materials, PCB substrates can include silicon-based PCB substrates and aluminum-based PCB substrates.

[0136] 4 as an example, when L = 14.95 mm, W = 11 mm, D1 = 2.50 mm, D2 = 1.00 mm, D3 = 6.95 mm, D4 = 2.50 mm, Gap = 0.50 mm, and G2 = 0.5 mm; then, in the direction from the first area A1 to the second area A2, the spacing between two adjacent light-emitting devices = D2 + Gap + D3 + D4 + Gap + D2 = 12.45 mm; and in the direction perpendicular to the first area A1 toward the second area A2, the spacing between two adjacent light-emitting devices = D1 + W + G2 + W + D1 = 27.50 mm. It can be seen that the pitch of the light-emitting devices in the back module provided in the embodiment of the present application can reach 27.5 mm, which is 31.08% smaller than the pitch of the light-emitting devices in the related art described above.

[0137] Of course, the above-mentioned backlight module may also include other structures and components. This specification only introduces structures and components related to the invention. For other structures and components included in the backlight module, reference may be made to the introduction in related technologies.

[0138] An embodiment of the present application provides a light bar, as shown in Figures 6 and 7, which is applied to the backlight module mentioned above. The light bar includes a connected extension portion LY and a bending portion LW, and the extension direction of the extension portion LY intersects with the extension direction of the bending portion LW.

[0139] In the light bar provided in at least one embodiment of the present application, as shown in FIG6 , the angle between the extending direction of the extending portion LY and the extending direction of the bent portion LW is an acute angle.

[0140] Illustratively, the acute angle may be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85° or 88°.

[0141] In the light bar provided in at least one embodiment of the present application, as shown in FIG7 , the angle between the extending direction of the extending portion LY and the extending direction of the bent portion LW is a right angle, and the light bar is an L-shaped light bar.

[0142] In the embodiments of the present application, the light strips are provided to include a connected extension portion LY and a bending portion LW, and the extension direction of the extension portion LY intersects with the extension direction of the bending portion LW. Since the light-emitting device is provided on the extension portion LY, and two adjacent light strips can be electrically connected together through the bending portion LW, the minimum spacing between two adjacent light-emitting devices Q in the backlight module can be greatly reduced, which is conducive to preparing a backlight module with a high distribution density of light-emitting devices Q.

[0143] An embodiment of the present application provides a method for preparing a light bar, which is used to prepare the light bar as described above, and the method includes:

[0144] S01, providing a driving motherboard 100 as shown in FIG8 ;

[0145] Exemplarily, the driving motherboard 100 may include an aluminum-based PCB substrate or a silicon-based PCB substrate.

[0146] S02, forming a plurality of light-emitting devices Q arranged in an array as shown in FIG8 on the driving motherboard 100;

[0147] Exemplarily, the plurality of light-emitting devices Q are all sub-millimeter light-emitting diodes (Mini Light Emitting Diode, abbreviated as Mini LED in English) or micro light-emitting diodes (Micro Light Emitting Diode, abbreviated as Micro LED in English).

[0148] S03, using the dotted line marked Cut1 in FIG9 as the cutting line, performing the first cutting to cut the driving motherboard 100 into a plurality of parallelogram-shaped intermediate substrates;

[0149] S04. Perform a second cut using the dotted line marked Cut2 in FIG9 as the cutting line to cut the parallelogram-shaped intermediate substrate into two light strips L; wherein the light strip L includes a connected extension portion LY and a bent portion LW, and the extension direction of the extension portion LY intersects the extension direction of the bent portion LW.

[0150] The method for preparing the light bar provided in the embodiment of the present application can, on the one hand, flexibly adjust the number of light bars cut from a driver motherboard 100 according to the size of the driver motherboard 100 and the actual production capacity; on the other hand, by forming multiple light-emitting devices Q before cutting, it can greatly improve the production efficiency of the light bar, while reducing the consumption of the light bar carrier tool during the preparation process, thereby reducing production costs. In addition, the light bar prepared in the embodiment of the present application can be provided by providing a light bar including a connected extension portion LY and a bending portion LW, wherein the extension direction of the extension portion LY intersects the extension direction of the bending portion LW. Since the light-emitting device is provided on the extension portion LY, and two adjacent light bars can be electrically connected together through the bending portion LW, the minimum spacing between two adjacent light-emitting devices Q in the backlight module can be greatly reduced, which is conducive to the preparation of a backlight module with a high distribution density of light-emitting devices Q.

[0151] In some embodiments of the present application, after forming a plurality of light-emitting devices Q arranged in an array as shown in FIG8 on the driving motherboard 100 at S02, and before performing a first cutting at S03 using the dotted line marked Cut1 in FIG9 as a cutting line to cut the driving motherboard 100 into a plurality of parallelogram-shaped intermediate substrates, the method may further include:

[0152] S05 , forming a plurality of connectors C as shown in FIG8 on the driving motherboard 100 , wherein the connectors include the first connector C1 and the second connector C2 as described above.

[0153] In the preparation method provided in the embodiment of the present application, by forming multiple connectors C as shown in Figure 8 before cutting, the production efficiency of the light bar can be greatly improved, while the consumption of the light bar carrier tool during the preparation process can be reduced, further reducing the production cost.

[0154] An embodiment of the present application provides a display device, comprising the backlight module as described above.

[0155] In an exemplary embodiment, the display device may further include a display panel, which is disposed on the light-emitting side of the backlight module.

[0156] The specific structure of the backlight module can be referred to the introduction in the previous article and will not be repeated here.

[0157] The above-mentioned display device can be a liquid crystal display (LCD) device. Exemplarily, the liquid crystal display device can include a twisted nematic (TN) type, a vertical alignment (VA) type, an in-plane switching (IPS) type, and an advanced super-dimensional switch (ADS) type.

[0158] The display device may be a display device such as an LCD display, or any product or component with a display function such as a television, a digital camera, a mobile phone, or a tablet computer that includes such a display device.

[0159] The display device provided in the embodiments of the present application can be configured such that the light strips include a connected extension portion LY and a bent portion LW, wherein the extension direction of the extension portion LY intersects with the extension direction of the bent portion LW. Since the light-emitting device is arranged on the extension portion LY, and two adjacent light strips can be electrically connected together through the bent portion LW, the minimum spacing between two adjacent light-emitting devices Q in the backlight module can be greatly reduced, which is conducive to preparing a backlight module with a high distribution density of light-emitting devices Q, thereby helping to improve the display effect of the display device.

[0160] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A backlight module, wherein, Comprising at least one first region, at least one second region, and a splicing region located between the first region and the second region; The first region includes a plurality of first light bars arranged in a first direction, the second region includes a plurality of second light bars arranged in a second direction, and the first direction and the second direction are opposite; the splicing region includes a splicing component; Wherein, both the first light bar and the second light bar include a connected extension part and a bent part, the extension direction of the extension part intersects with the extension direction of the bent part, the extension directions of the bent parts of the first light bar and the second light bar are opposite, a plurality of light-emitting devices are arranged on the extension part, and the bent parts of the first light bar and the second light bar are electrically connected to the splicing component together.

2. The backlight module according to claim 1, wherein, The included angle between the extension direction and the bent direction of the extension part of the first light bar is a first included angle, the included angle between the extension direction and the bent direction of the extension part of the second light bar is a second included angle, the first included angle and the second included angle are equal, and the openings of the first included angle and the second included angle face in opposite directions.

3. The backlight module according to claim 2, wherein, Both the first included angle and the second included angle are acute angles or right angles.

4. The backlight module according to claim 2, wherein, The splicing component includes an adapter board, a plurality of first connectors, and a plurality of second connectors; The plurality of first connectors and the plurality of second connectors are electrically connected to the adapter board respectively, the bent part of the first light bar is electrically connected to the first connector, and the bent part of the second light bar is electrically connected to the second connector; Wherein, the extension direction of the adapter board is parallel to the extension direction of the bent part.

5. The backlight module according to claim 4, wherein, In the nth row of light bars of the backlight module, along the extension direction of the adapter board, the distance between the first connector electrically connected to the first light bar in the nth row and the second connector electrically connected to the second light bar in the nth row is greater than the distance between the first connector electrically connected to the first light bar in the nth row and the second connector electrically connected to the second light bar in the (n + 1)th row, where n is a positive integer.

6. The backlight module according to claim 5, wherein, The minimum distance between the side of the first connector away from the adapter board and the side of the second connector away from the adapter board along the direction perpendicular to the extension direction of the adapter board is less than or equal to the sum of the dimensions of the first connector and the second connector along the direction perpendicular to the extension direction of the adapter board.

7. The backlight module according to claim 6, wherein, The extension directions of the extension parts of the first light bar and the second light bar are the same, and a plurality of the light-emitting devices are arranged in the same row on the extension part; In the nth row of light bars of the backlight module, the connection lines of the geometric centers of the plurality of light-emitting devices on the extension part of the first light bar and the connection lines of the geometric centers of the plurality of light-emitting devices on the extension part of the second light bar are collinear, where n is a positive integer.

8. The backlight module according to claim 7, wherein, The spacing between two adjacent extension parts along the extension direction of the adapter board is greater than the sum of the dimensions of the first connector and the second connector along the extension direction of the adapter board.

9. The backlight module according to claim 7, wherein The minimum distance between the geometric center of the light-emitting device and the edge of the extension portion close to the side of the adapter board is greater than or equal to 1 mm.

10. The backlight module according to claim 7, wherein, On the same light bar, along the extension direction of the bending portion, the minimum distance between the geometric center of the light-emitting device and the connector is greater than or equal to 2.5 mm.

11. The backlight module according to claim 7, wherein, Along the extension direction of the adapter board, the distance between the first connector electrically connected to the nth row of the first light bar and the second connector electrically connected to the (n + 1)th row of the second light bar ranges from 0.25 mm to 0.75 mm.

12. The backlight module according to any one of claims 1 to 11, wherein, The first light bar and the second light bar are the same; The light-emitting devices on the first light bar and the second light bar are both sub-millimeter light-emitting diodes or micro light-emitting diodes.

13. A light bar, wherein, The light bar is applied to the backlight module as described in claims 1 to 12. The light bar includes a connected extension portion and a bending portion, and the extension direction of the extension portion intersects with the extension direction of the bending portion.

14. The light bar according to claim 13, wherein, The included angle between the extension direction of the extension portion and the extension direction of the bending portion is an acute angle.

15. The light bar according to claim 13, wherein, The included angle between the extension direction of the extension portion and the extension direction of the bending portion is a right angle, and the light bar is an L-shaped light bar.

16. A method for preparing a light bar, wherein, Applied to prepare the light bar as described in any one of claims 13 to 15, the method includes: Providing a driving mother board; Forming a plurality of light-emitting devices arranged in an array on the driving mother board; Performing a first cutting to cut the driving mother board into a plurality of parallelogram intermediate substrates; Performing a second cutting to cut the parallelogram intermediate substrate into a first light bar and a second light bar; wherein, both the first light bar and the second light bar include a connected extension portion and a bending portion, and the extension direction of the extension portion intersects with the extension direction of the bending portion.

17. A display device, wherein, Including the backlight module as described in claims 1 to 12.

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