Backlight module and display device

Abstract

The utility model provides a backlight module. The backlight module comprises a back plate; the light guide plate is located on the back plate and comprises a first light inlet surface, a second light inlet surface and a light outlet surface; comprising a first light source and a second light source which are located on the two sides of the light guide plate in the first direction respectively, the light-emitting face of the first light source faces the first light-in face, and the light-emitting face of the second light source faces the second light-in face. The first frame extends in the second direction and is located on the side, away from the light guide plate, of the first light source, and the first frame is connected with the side, away from the first light source, of the backboard; the second frame extends in the second direction and is located on the side, away from the light guide plate, of the second light source, and the second frame is connected with the side, away from the second light source, of the back plate; the orthographic projection of the first frame on the back plate is spaced from the orthographic projection of the first light source on the back plate, and the orthographic projection of the second frame on the back plate covers at least one part of the orthographic projection of the second light source on the back plate.

Description

Technical Field

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

[0002] With the accelerating upgrade of tablet personal computer (TPC) products, in order to pursue a better outdoor visual experience, the market has a strong demand for products with high brightness. To further improve the relevant performance of TPCs, how to improve the luminous performance of the backlight module is one of the topics that R & D personnel of display products are concerned about.

[0003] The above information disclosed in this section is only used to understand the background of the inventive concept of the present disclosure. Therefore, the above information may include information that does not constitute the prior art. Summary of the Utility Model

[0004] In one aspect, a backlight module is provided, including:

[0005] A back plate;

[0006] A light guide plate located on the back plate, the light guide plate including a first light incident surface and a second light incident surface, the second light incident surface and the first light incident surface being respectively located on two sides of the light guide plate along a first direction;

[0007] Light sources, including a first light source and a second light source, the first light source and the second light source being respectively located on two sides of the light guide plate along the first direction, an outgoing light surface of the first light source being arranged facing the first light incident surface, and an outgoing light surface of the second light source being arranged facing the second light incident surface;

[0008] A first frame extending along a second direction and located on a side of the first light source away from the light guide plate, the first frame being connected to a side of the back plate away from the first light source, the second direction intersecting the first direction; and

[0009] A second frame extending along the second direction and located on a side of the second light source away from the light guide plate, the second frame being connected to a side of the back plate away from the second light source;

[0010] wherein, a positive projection of the first frame on the back plate is spaced apart from a positive projection of the first light source on the back plate, and a positive projection of the second frame on the back plate covers at least a part of a positive projection of the second light source on the back plate.

[0011] According to some exemplary embodiments, the backlight module further includes a first circuit board and a second circuit board. The first circuit board includes a first main body portion and a first connection portion. The first main body portion is electrically connected to the first light source. One end of the first connection portion is electrically connected to the first main body portion, and the other end extends out through a first hollow structure in the first frame.

[0012] The second circuit board includes a second main body portion and a second connection portion. The second main body portion is electrically connected to the second light source. One end of the second connection portion is electrically connected to the second main body portion, and the other end extends out through a second hollow structure in the second frame; and

[0013] The orthographic projection of the first frame on the back plate is spaced from the orthographic projection of the first main body portion on the back plate, and the orthographic projection of the second frame on the back plate at least partially overlaps with the orthographic projection of the second main body portion on the back plate.

[0014] According to some exemplary embodiments, the dimension of the first frame along the first direction is smaller than the dimension of the second frame along the first direction.

[0015] According to some exemplary embodiments, the second frame includes a second side plate and a second top plate. The second side plate is connected to the side of the back plate away from the second light source. One side of the second top plate is connected to the side of the second side plate away from the back plate, and the other side extends in a direction close to the light guide plate. At least a part of the second light source is located between the second top plate and the back plate, and / or at least a part of the second main body portion is located between the second top plate and the back plate.

[0016] According to some exemplary embodiments, the first frame includes a first side plate and a first top plate. The first side plate is connected to the side of the back plate away from the first light source. One side of the first top plate is connected to the side of the first side plate away from the back plate, and the other side extends in a direction close to the light guide plate. The dimension of the first top plate along the first direction is smaller than the dimension of the second top plate along the first direction. The orthographic projection of the first top plate on the back plate is spaced from the orthographic projection of the first light source on the back plate, and moreover, the orthographic projection of the first top plate on the back plate is spaced from the orthographic projection of the first main body portion on the back plate.

[0017] According to some exemplary embodiments, the first frame includes a first side plate and a first glue frame. The first side plate is connected to the side of the back plate away from the first light source. The first glue frame is connected to the side of the first side plate close to the first light source and the side of the first side plate away from the back plate. The distance between the side of the first glue frame close to the first light source and the side of the first side plate away from the first light source in the first direction is less than the distance between the side of the second top plate close to the second light source and the side of the second side plate away from the second light source in the first direction. The first glue frame is spaced apart from the first light source in the first direction, and the first glue frame is spaced apart from the first main body portion in the first direction.

[0018] According to some exemplary embodiments, the first hollow structure extends from the first side plate to the first top plate and penetrates the edge of the first top plate close to the light guide plate in the first direction.

[0019] According to some exemplary embodiments, the first hollow structure includes a first hollow sub - portion located in the first side plate and a second hollow sub - portion located in the first glue frame. The first hollow sub - portion extends from the side of the first side plate close to the back plate in a direction away from the back plate and penetrates the edge of the first side plate away from the back plate. The second hollow sub - portion extends from the side of the first glue frame close to the back plate in a direction away from the back plate and penetrates the edge of the first glue frame away from the back plate. The first hollow sub - portion and the second hollow sub - portion are in communication.

[0020] According to some exemplary embodiments, the second hollow structure is located in the second side plate, and the side of the second hollow structure away from the back plate terminates at the side of the second top plate close to the back plate.

[0021] According to some exemplary embodiments, at least one corner of the light guide plate is a concave arc - shaped corner;

[0022] At least one of the concave arc - shaped corners is adjacent to the first light source, and the orthographic projection of the concave arc - shaped corner on the first frame is spaced apart from or tangent to the orthographic projection of the first light source on the first frame; and / or

[0023] At least one of the concave arc - shaped corners is adjacent to the second light source, and the orthographic projection of the concave arc - shaped corner on the second frame is spaced apart from or tangent to the orthographic projection of the second light source on the second frame.

[0024] According to some exemplary embodiments, the first light source includes a plurality of light - emitting devices spaced apart along the second direction, and / or the second light source includes a plurality of light - emitting devices spaced apart along the second direction; and

[0025] The size of the light-emitting device in the second direction is a first size, the distance between adjacent light-emitting devices in the second direction is a second size, and the size of the concave arc angle in the second direction is a third size, where the third size ≤ the first size + the second size.

[0026] According to some exemplary embodiments, the backlight module further includes a first light source reflection film on the side of the first light source away from the backplane, a first colloid on the side of the first light source reflection film away from the backplane, and a diffusion film on the side of the first colloid away from the backplane, and the diffusion film extends from the side of the first colloid away from the backplane to the side of the light guide plate away from the backplane.

[0027] According to some exemplary embodiments, the backlight module further includes a brightness enhancement film on the side of the diffusion film away from the backplane, and the side of the brightness enhancement film away from the backplane is substantially flush with the side of the first top plate away from the backplane.

[0028] According to some exemplary embodiments, the brightness enhancement film includes a first brightness enhancement film on the side of the diffusion film away from the backplane and a second brightness enhancement film on the side of the first brightness enhancement film away from the backplane. The side of the first brightness enhancement film close to the first border is substantially flush with the side of the diffusion film close to the first border, and the side of the second brightness enhancement film close to the first border is farther from the first border than the side of the first light source reflection film away from the first border;

[0029] The first brightness enhancement film includes a first portion on the side of the first light source reflection film away from the backplane. The side of the first portion away from the backplane is substantially flush with the side of the first top plate away from the backplane, and the side of the first portion away from the backplane is substantially flush with the side of the second brightness enhancement film away from the backplane.

[0030] According to some exemplary embodiments, the backlight module further includes a third border and a fourth border respectively on both sides of the light guide plate in the second direction. A third glue frame is provided on the third border, and / or a fourth glue frame is provided on the fourth border.

[0031] According to some exemplary embodiments, a plurality of first dot patterns are provided in an array on the side of the light guide plate close to the backplane. The plurality of first dot patterns include a first dot pattern portion and a second dot pattern portion arranged in the first direction. The first dot pattern portion is on the side close to the first light source, and the second dot pattern portion is on the side close to the second light source;

[0032] In the first dot pattern portion, along the direction from the first light source to the second light source, the distribution density of the first dot patterns gradually increases;

[0033] In the second dot area, along the direction from the first light source to the second light source, the distribution density of the first dots gradually decreases.

[0034] According to some exemplary embodiments, the plurality of dots includes multiple columns of first dots arranged along the first direction;

[0035] In the first dot area, along the direction from the first light source to the second light source, the pitch between two adjacent columns of first dots along the first direction gradually decreases, and among four adjacent columns of first dots, the pitch between the column of first dots closest to the first light source and an adjacent column of first dots along the first direction is a first pitch, the pitch between the two middle columns of first dots along the first direction is a second pitch, the pitch between the column of first dots farthest from the first light source and an adjacent column of first dots along the first direction is a third pitch, and the difference between the first pitch and the second pitch is greater than the difference between the second pitch and the third pitch; and / or

[0036] In the second dot area, along the direction from the first light source to the second light source, the pitch between two adjacent columns of first dots along the first direction gradually increases, and among four adjacent columns of first dots, the pitch between the column of first dots closest to the second light source and an adjacent column of first dots along the first direction is a fourth pitch, the pitch between the two middle columns of first dots along the first direction is a fifth pitch, the pitch between the column of first dots farthest from the second light source and an adjacent column of first dots along the first direction is a sixth pitch, and the difference between the fourth pitch and the fifth pitch is greater than the difference between the fifth pitch and the sixth pitch.

[0037] According to some exemplary embodiments, the shape of the first dot includes a triangular pyramid shape, the first dot includes a first bottom surface, a first edge, a second edge, and a third edge, the first bottom surface is an isosceles triangle, the first edge is connected to the intersection of the two waists in the first bottom surface, and the first edge is perpendicular to the first bottom surface, and the second edge and the third edge enclose a first side surface with the bottom edge of the first bottom surface;

[0038] The first dot is recessed from the side of the light guide plate close to the back plate towards the direction away from the back plate, and the first bottom surface is substantially flush with the side of the light guide plate close to the back plate; and

[0039] In the first dot area, the first side surface of the first dot faces the light emitting surface of the first light source, and in the second dot area, the first side surface of the first dot faces the light emitting surface of the second light source.

[0040] According to some exemplary embodiments, in the first dot area, a first side surface of the first dot faces the light-emitting surface of the first light source and the third frame, and an included angle between a side edge where the first side surface is connected to the first bottom surface and the light-emitting surface of the first light source is a first included angle; and

[0041] In the second dot area, the first side surface of the first dot faces the light-emitting surface of the second light source and the fourth frame, and an included angle between a side edge where the first side surface is connected to the first bottom surface and the light-emitting surface of the second light source is a second included angle;

[0042] Wherein, the first included angle and the second included angle are substantially equal, and the first included angle and the second included angle are acute angles.

[0043] According to some exemplary embodiments, the apex angle of the first bottom surface is an obtuse angle; and / or

[0044] An included angle between the first bottom surface and the first side surface is 45°.

[0045] According to some exemplary embodiments, the light guide plate further includes a third light-incident surface, and the third light-incident surface is located on one side of the light guide plate in the second direction;

[0046] The backlight module further includes a third light source and a third frame. The third light source is located on one side of the light guide plate along the second direction, the light-emitting surface of the third light source faces the third light-incident surface, the third frame is located on a side of the third light source away from the light guide plate, the third frame includes a third side plate and a third top plate, the third side plate is connected to a side edge of the back plate away from the third light source, and one side of the third top plate is connected to a side edge of the third side plate away from the back plate and the other side extends towards the light guide plate; and

[0047] A dimension of the third top plate along the second direction is smaller than a dimension of the second top plate along the first direction, and a positive projection of the third top plate on the back plate is spaced apart from a positive projection of the third light source on the back plate.

[0048] According to some exemplary embodiments, the backlight module further includes a fourth frame, and the fourth frame is located on a side of the light guide plate away from the third frame;

[0049] The fourth frame includes a fourth side plate and a fourth top plate, the fourth side plate is connected to a side edge of the back plate away from the third frame, and one side of the fourth top plate is connected to a side edge of the fourth side plate away from the back plate and the other side extends towards the light guide plate; and

[0050] The size of the fourth top plate along the second direction is smaller than the size of the second top plate along the first direction, and the orthographic projection of the fourth top plate on the back plate is spaced apart from the orthographic projection of the light guide plate on the back plate.

[0051] According to some exemplary embodiments, a plurality of second dot patterns are arranged in an array on the side surface of the light guide plate close to the back plate, and along the direction away from the third light source, the distribution density of the second dot patterns gradually decreases.

[0052] According to some exemplary embodiments, the plurality of second dot patterns include multiple rows of second dot patterns arranged along the second direction, and along the direction away from the third light source, the distance between adjacent two rows of second dot patterns gradually decreases;

[0053] Among four adjacent rows of second dot patterns, the distance between the row of first dot patterns closest to the third light source and an adjacent row of first dot patterns is the seventh distance, the distance between the two middle rows of first dot patterns is the eighth distance, the distance between the row of first dot patterns farthest from the third light source and an adjacent row of first dot patterns is the ninth distance, and the difference between the seventh distance and the eighth distance is less than the difference between the eighth distance and the ninth distance.

[0054] According to some exemplary embodiments, the shape of the second dot pattern includes a triangular pyramid shape. The second dot pattern includes a second bottom surface, a fourth edge, a fifth edge, and a sixth edge. The shape of the second bottom surface is an isosceles triangle. The fourth edge is connected to the intersection point of the two waists of the second bottom surface, and the fourth edge is perpendicular to the second bottom surface. The fifth edge and the sixth edge enclose a second side surface with the bottom edge of the second bottom surface;

[0055] The second dot pattern is recessed from the side surface of the light guide plate close to the back plate in a direction away from the back plate, and the second bottom surface is substantially flush with the side surface of the light guide plate close to the back plate; and

[0056] The second side surface faces the third light source, and the side edge where the second side surface is connected to the second bottom surface is parallel to the light-emitting surface of the third light source.

[0057] According to some exemplary embodiments, the apex angle of the second bottom surface is an acute angle; and / or

[0058] The size of the second bottom surface along the second direction is equal to the length of the fourth edge.

[0059] According to some exemplary embodiments, the light guide plate further includes a third light incident surface and a fourth light incident surface. The third light incident surface and the fourth light incident surface are respectively located on two sides of the light guide plate along the second direction. The backlight module further includes a third light source and a fourth light source. The third light source and the fourth light source are respectively located on two sides of the light guide plate along the second direction. The light emitting surface of the third light source faces the third light incident surface, and the light emitting surface of the fourth light source faces the fourth light incident surface;

[0060] The backlight module further includes a third frame and a fourth frame. The third frame is located on the side of the third light source away from the light guide plate. The third frame includes a third side plate and a third top plate. The third side plate is connected to the side of the back plate away from the third light source. One side of the third top plate is connected to the side of the third side plate away from the back plate and the other side extends towards the light guide plate. The fourth frame is located on the side of the fourth light source away from the light guide plate. The fourth frame includes a fourth side plate and a fourth top plate. The fourth side plate is connected to the side of the back plate away from the fourth light source. One side of the fourth top plate is connected to the side of the fourth side plate away from the back plate and the other side extends towards the light guide plate; and

[0061] The dimension of the third top plate along the second direction is smaller than the dimension of the second top plate along the first direction. The orthographic projection of the third top plate on the back plate is spaced apart from the orthographic projection of the third light source on the back plate. The dimension of the fourth top plate along the second direction is smaller than the dimension of the second top plate along the first direction. The orthographic projection of the fourth top plate on the back plate is spaced apart from the orthographic projection of the fourth light source on the back plate.

[0062] According to some exemplary embodiments, a plurality of third light dots are arranged in an array on the side surface of the light guide plate close to the back plate, and the plurality of third light dots are evenly distributed.

[0063] According to some exemplary embodiments, the shape of the third light dot includes a quadrangular pyramid. The third light dot includes a third bottom surface, and the third bottom surface is a rhombus. The orthographic projection of the vertex of the third light dot away from the third bottom surface on the third bottom surface coincides with the geometric center of the third bottom surface;

[0064] The third light dot is recessed from the side surface of the light guide plate close to the back plate towards the direction away from the back plate, and the third bottom surface is substantially flush with the side surface of the light guide plate close to the back plate; and

[0065] The third bottom surface includes a first diagonal line and a second diagonal line. The first diagonal line is parallel to the light-emitting surfaces of the first light source and the second light source, and the second diagonal line is parallel to the light-emitting surfaces of the third light source and the fourth light source.

[0066] According to some exemplary embodiments, the size of the light guide plate along the second direction is smaller than the size of the light guide plate along the first direction, and the length of the first diagonal line is smaller than the length of the second diagonal line.

[0067] According to some exemplary embodiments, the third light guide dots include a seventh edge and an eighth edge. The orthographic projections of the seventh edge and the eighth edge on the third bottom surface coincide with the second diagonal line. The included angle between the seventh edge and the third bottom surface is 45°, and the included angle between the eighth edge and the third bottom surface is 45°.

[0068] On the other hand, a display device is provided. The display device includes a display panel and the backlight module as described in any one of the above. The display panel is located on one side of the light-emitting surface of the backlight module.

[0069] According to some exemplary embodiments, the display device further includes:

[0070] A cover plate, located on the side of the display panel away from the backlight module, and the edge of the cover plate protrudes from the edge of the display panel;

[0071] A first adhesive layer, located between the backlight module and the display panel, and one side of the first adhesive layer extends to the side of the first frame and / or the second frame away from the backplane; and

[0072] A support bar, located between the first adhesive layer and the cover plate, and the orthographic projection of the support bar on the backplane at least partially overlaps with the orthographic projection of the first frame on the backplane.

[0073] According to some exemplary embodiments, the display panel includes:

[0074] A first polarizing layer, located on the backlight module;

[0075] An array substrate, located on the side of the first polarizing layer away from the backlight module;

[0076] A color filter substrate, located on the side of the array substrate away from the backlight module; and

[0077] A second polarizing layer, located on the side of the color filter substrate away from the backplane;

[0078] Among them, the side of the support bar away from the backlight module is closer to the backlight module than the side of the color filter substrate away from the backlight module.

[0079] According to some exemplary embodiments, the display device further includes a packaging tape, one end of the packaging tape is attached to the side of the display panel away from the backlight module, and the other end extends to the side of the backplane away from the light guide plate through the side of the support bar away from the backplane and the side of the first frame away from the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Other objects and advantages of the present disclosure will become apparent and can help to have a comprehensive understanding of the present disclosure through the description of the present disclosure with reference to the accompanying drawings hereinafter.

[0081] Figure 1 A plan view of a display device in the related art is schematically shown.

[0082] Figure 2 A cross-sectional view of a backlight module in the related art is schematically shown.

[0083] Figure 3A-3B A cross-sectional view of a backlight module in the related art is schematically shown.

[0084] Figure 4 A plan schematic diagram of a backlight module according to some embodiments of the present disclosure is schematically shown.

[0085] Figure 5A Schematically shown along Figure 4 a cross-sectional view taken along the center line AA'.

[0086] Figure 5B Schematically shown along Figure 4 a cross-sectional view taken along the center line BB'.

[0087] Figure 5C Schematically shown along Figure 4 a cross-sectional view taken along the center line CC'.

[0088] Figure 5D Schematically shown along Figure 4 a cross-sectional view taken along the center line DD'.

[0089] Figure 5E Schematically shown along Figure 4 another cross-sectional view taken along the center line AA'.

[0090] Fig. 6A Schematically shown Figure 4 an enlarged view of area A1 in

[0091] Figure 6BSchematically shows Fig. 6A A cross-sectional view taken along line EE'.

[0092] Figure 6C Schematically shows Figure 4 Another enlarged view of region A1 in

[0093] Fig.6D Schematically shows Figure 6C A side view of the first hollow structure in

[0094] Fig. 7A Schematically shows Figure 4 An enlarged view of region A2 in

[0095] Figure 7B Schematically shows Fig. 7A A cross-sectional view taken along line FF'.

[0096] Figure 8 Schematically shows Figure 4 An enlarged view of region A3 in

[0097] Fig. 9 Schematically shows an assembly flow chart of a backlight module according to some embodiments of the present disclosure.

[0098] Fig.10 Schematically shows a plan view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0099] Fig.11 Schematically shows a distribution density trend diagram of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0100] Fig. 12A Schematically shows a three-dimensional view of a first dot on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0101] Fig. 12B Schematically shows a cross-sectional view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0102] Fig. 12C Schematically shows a plan view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0103] Fig.13 Schematically shows a plan schematic view of a backlight module according to some embodiments of the present disclosure.

[0104] Fig.14A Schematically shows along Fig.13 A cross-sectional view taken along the center line GG'.

[0105] Fig. 14B Schematically shows a cross-sectional view taken along Fig.13 the center line HH'.

[0106] Fig. 14C Schematically shows Fig.13 an enlarged view of area A4 in

[0107] Fig.15 Schematically shows an assembly flow chart of a backlight module according to some embodiments of the present disclosure.

[0108] Fig.16 Schematically shows a plan view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0109] Fig.17 Schematically shows a distribution density trend chart of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0110] Fig.18A Schematically shows a three-dimensional view of a second dot on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0111] Fig.18B Schematically shows a cross-sectional view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0112] Fig.19 Schematically shows a plan view of a backlight module according to some embodiments of the present disclosure.

[0113] Fig. 20 Schematically shows along Fig.19 the center line JJ'.

[0114] Fig.21 Schematically shows a plan view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0115] Fig.22A Schematically shows a three-dimensional view of a third dot on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0116] Fig. 22B Schematically shows a cross-sectional view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0117] Fig.23A Schematically shows a cross-sectional view of a display device according to some embodiments of the present disclosure.

[0118] Fig. 23B Schematically shows a cross-sectional view of a display device according to some other embodiments of the present disclosure.

[0119] Fig.24 Schematically shows a plan view of a display device according to some embodiments of the present disclosure.

[0120] Fig.25 Schematically shows a plan view of a display device according to some embodiments of the present disclosure.

[0121] It should be noted that, for clarity, in the drawings used to describe the embodiments of the present disclosure, the dimensions of layers, structures, or regions may be enlarged or reduced, that is, these drawings are not drawn to actual scale. Detailed embodiments

[0122] In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of various exemplary embodiments. However, it is apparent that the various exemplary embodiments can be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Additionally, the various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment.

[0123] In the drawings, for clarity and / or for descriptive purposes, the dimensions of elements may be enlarged and relative dimensions. Thus, the dimensions and relative dimensions of the respective elements need not be limited to the dimensions and relative dimensions shown in the figures. When the exemplary embodiments can be implemented differently, the specific process order may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the described order. Additionally, like reference numerals denote like elements.

[0124] When an element is described as “on” another element, “connected to” another element, or “coupled to” another element, the element can be directly on the other element, directly connected to the other element, or directly coupled to the other element, or there can be an intermediate element. However, when an element is described as “directly on” another element, “directly connected to” another element, or “directly coupled to” another element, there is no intermediate element. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, “between” versus “directly between”, “adjacent” versus “directly adjacent”, or “on” versus “directly on”, etc. In addition, the term “connected” can refer to physical connection, electrical connection, communication connection, and / or fluid connection. In addition, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a rectangular coordinate system and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z such as XYZ, XY, YZ, and XZ. As used herein, the term “and / or” includes any combination and all combinations of one or more of the listed related items.

[0125] It should be understood that although terms such as first, second, etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the exemplary embodiments, the first element can be named the second element, and similarly, the second element can be named the first element.

[0126] Figure 1 A plan view of a display device in the related art is schematically shown.

[0127] Referring to Figure 1, The display device includes a backlight module BLU and a display panel PNL located on one side of the light-emitting surface of the backlight module BLU. The backlight module BLU is a side-in type backlight module BLU, and the light source 130 is arranged in a single-sided light-incidence manner, that is, the light source 130 is located at one side edge of the backlight module BLU. At the same time, the driving chip IC of the display panel PNL and the light source 130 of the backlight module BLU are arranged on the same side. In this display device, there will be some problems. On the one hand, the emitted light of the light source 130 is limited, and the brightness of the backlight is difficult to meet the high-brightness display requirements of the display device. On the other hand, since the light source 130 and the driving chip IC are arranged on the same side, the heat generated by the driving chip IC during operation and the heat generated by the light source 130 during operation will be superimposed, resulting in a risk of overheating of the backlight module BLU and the display panel PNL, affecting the reliability and lifespan of the display device.

[0128] Figure 2 Schematically shows a cross-sectional view of a backlight module in the related art.

[0129] Referring to Figure 2 , in order to improve the brightness of the backlight, the inventor adjusts the light-incidence mode of the backlight module from single-sided light-incidence to double-sided light-incidence, that is, two light sources 130 are respectively arranged on opposite sides of the light guide plate 120, so as to increase the light flux incident into the light guide plate 120. Among the two side frames where the light sources 130 are arranged, one side frame adopts a U-fold structure, and the other side frame adopts a glue-iron integrated structure. However, this will cause interference between the glue-iron integrated frame and the light source 130 and the light guide plate 120 during assembly ( Figure 2 the position indicated by the dotted circle in

[0130] Figure 3A-3B Schematically shows a cross-sectional view of a backlight module in the related art.

[0131] Referring to Figure 3A , in order to solve the problem of impossible assembly, the inventor sets one side frame to a glue-iron separated structure, that is, after assembling the light guide plate 120 and the light source 130, the glue frame 91 is assembled onto the frame 92 of the backlight module. The structure of the assembled backlight module can be referred to Figure 3B .

[0132] However, during the research process, the inventor further discovers that if the Figure 3B schematic structure is adopted, it will make the assembly process of the backlight module complex, the assembly yield low, and it is impossible to achieve fully automated assembly, which is not conducive to large-scale production.

[0133] Figure 4 Schematically shows a plan view of a backlight module according to some embodiments of the present disclosure. Figure 5ASchematically shows a cross-sectional view taken along Figure 4 the center line AA'. Figure 5B Schematically shows a cross-sectional view taken along Figure 4 the center line BB'. Figure 5C Schematically shows a cross-sectional view taken along Figure 4 the center line CC'. Figure 5D Schematically shows a cross-sectional view taken along Figure 4 the center line DD'. Figure 5E Schematically shows a cross-sectional view taken along Figure 4 the center line AA' of another cross-sectional view.

[0134] With reference to FIGS. 4 Figure 5A and Figure 5B The backlight module includes a back plate 110, a light guide plate 120, and a light source 130. The light guide plate 120 is located on the back plate 110. The side of the light guide plate 120 away from the back plate 110 is the light-emitting surface 12E of the light guide plate 120. The light-incident surface of the light guide plate 120 includes a first light-incident surface 12A and a second light-incident surface 12B. The second light-incident surface 12B and the first light-incident surface 12A are respectively located on both sides of the light guide plate 120 along the first direction X. The light source 130 includes a first light source 131 and a second light source 132. The first light source 131 and the second light source 132 are respectively located on both sides of the light guide plate 120 along the first direction X. The light-emitting surface 131A of the first light source 131 is arranged facing the first light-incident surface 12A, and the light-emitting surface 132A of the second light source 132 is arranged facing the second light-incident surface 12B. The first light source 131 and the second light source 132 respectively incident light rays into the light guide plate 120 from the first light-incident surface 12A and the second light-incident surface 12B.

[0135] The display module further includes a first frame 210 located on one side of the first light source 131 and a second frame 220 located on one side of the second light source 132. The first frame 210 extends along the second direction Y and is located on the side of the first light source 131 away from the light guide plate 120. The first frame 210 is connected to the side of the back plate 110 away from the first light source 131. The second frame 220 extends along the second direction Y and is located on the side of the second light source 132 away from the light guide plate 120. The second frame 220 is connected to the side of the back plate 110 away from the second light source 132. The orthographic projection of the first frame 210 on the back plate 110 is spaced from the orthographic projection of the first light source 131 on the back plate 110. The orthographic projection of the second frame 220 on the back plate 110 covers at least a part of the orthographic projection of the second light source 132 on the back plate 110.

[0136] In the display module provided by the embodiments of the present disclosure, by disposing the first frame 210 at an interval from the first light source 131, and setting the orthographic projection of the second frame 220 on the backplane 110 to cover at least a part of the orthographic projection of the second light source 132 on the backplane 110, during the assembly process of the backlight module, the second light source 132 can be obliquely inserted into the second frame 220, that is, a structure in which the second frame 220 and the second light source 132 overlap is formed. Then, the first light source 131 is placed beside the first frame 210, that is, a structure in which the first frame 210 and the first light source 131 are spaced apart is formed. During the assembly process of the backlight module, neither the first light source 131 nor the second light source 132 will interfere with the frame, making the assembly process of the backlight module simple and fully automated assembly achievable. In addition, by respectively disposing the first light source 131 and the second light source 132 on both sides of the light guide plate 120 along the first direction X, the brightness of the backlight module can be effectively improved.

[0137] In the display module provided by the embodiments of the present disclosure, with reference to Figure 5A and Figure 5B , the dimension of the first frame 210 along the first direction X is smaller than the dimension of the second frame 220 along the first direction X. Since the second light source 132 is located inside the second frame 220, the dimension of the second frame 220 along the first direction X can be set larger to improve the supporting effect of the second frame 220 on the display panel assembled to the backlight module.

[0138] According to some exemplary embodiments, with reference to Figure 5A , the first frame 210 includes a first side plate 211 and a first top plate 212 connected to each other. The first side plate 211 is connected to the side of the backplane 110 away from the first light source 131. The first side plate 211 can be disposed substantially perpendicular to the backplane 110. One side of the first top plate 212 is connected to the side of the first side plate 211 away from the backplane 110 and the other side extends in a direction close to the light guide plate 120. The second direction Y intersects the first direction X. The first top plate 212 is disposed substantially parallel to the backplane 110. The first top plate 212, the first side plate 211 and the backplane 110 form a U-shaped structure. When the backlight module is assembled with the display panel, the U-shaped structure can be used to support one side of the display panel.

[0139] With reference to Figure 5B, the second border 220 includes a second side plate 221 and a second top plate 222. The second side plate 221 is connected to the side of the back plate 110 away from the second light source 132. The second side plate 221 can be disposed substantially perpendicular to the back plate 110. One side of the second top plate 222 is connected to the side of the second side plate 221 away from the back plate 110, and the other side extends in a direction close to the light guide plate 120. The second top plate 222 is disposed substantially parallel to the back plate 110. The second top plate 222, the second side plate 221, and the back plate 110 form a U-shaped support structure. When assembling the backlight module with the display panel, this U-shaped structure can be used to support one side of the display panel.

[0140] With reference to Figure 5A and Figure 5B , the distance D1 between the side of the first top plate 212 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 in the third direction Z (the direction perpendicular to the light-emitting surface 12E of the light guide plate 120) is substantially equal to the distance D2 between the side of the second top plate 222 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 in the third direction Z. That is, the side of the first top plate 212 away from the back plate 110 and the side of the second top plate 222 away from the back plate 110 are substantially at the same height. The dimension D3 of the first top plate 212 in the first direction X is smaller than the dimension D4 of the second top plate 222 in the first direction X. The orthographic projection of the first top plate 212 on the back plate 110 is spaced from the orthographic projection of the first light source 131 on the back plate 110, and the orthographic projection of the second top plate 222 on the back plate 110 and the orthographic projection of the second light source 132 on the back plate 110 at least partially overlap.

[0141] In the backlight module provided by the embodiments of the present disclosure, by setting the orthographic projection of the first top plate 212 on the back plate 110 and the orthographic projection of the first light source 131 on the back plate 110 to be non-overlapping, during the process of assembling the light source 130 and the light guide plate 120, the first light source 131 will not interfere with the first frame 210. And after assembling the light source 130 and the light guide plate 120, there is no need to assemble a glue frame at the first frame 210. The assembly process is simple and fully automated assembly can be achieved. On the other hand, by setting the orthographic projection of the second top plate 222 on the back plate 110 to partially overlap the orthographic projection of the second light source 132 on the back plate 110, that is, setting the dimension of the second top plate 222 along the first direction X to be larger, the supporting effect of the second top plate 222 can be improved. In addition, during the process of assembling the light source 130 and the light guide plate 120, the second light source 132 can be obliquely inserted between the second top plate 222 and the back plate 110. Even if the dimension of the second top plate 222 is increased, it will not affect the assembly. That is, by respectively arranging the first light source 131 and the second light source 132 on both sides of the light guide plate 120 along the first direction X, the brightness of the backlight module can be effectively improved. In addition, through specific designs of the first frame 210 and the second frame 220, the assembly process of the backlight module is simple and fully automated assembly can be achieved.

[0142] It should be noted that the dimension of the light guide plate 120 along the first direction X can be greater than the dimension along the second direction Y. The first light source 131 and the second light source 132 can be arranged on both sides of the light guide plate 120 along the first direction X, or the first light source 131 and the second light source 132 can also be arranged on both sides of the light guide plate 120 along the second direction Y.

[0143] According to some exemplary embodiments, referring to Figure 5B , the orthographic projection of the second top plate 222 on the back plate 110 covers the orthographic projection of the second light source 132 on the back plate 110, and the orthographic projection of the second top plate 222 on the back plate 110 partially overlaps the orthographic projection of the light guide plate 120 on the back plate 110. The second top plate 222 can be extended to overlap a part of the light guide plate 120, that is, setting the dimension D4 of the second top plate 222 along the first direction X to be larger, thereby further improving the supporting effect of the second top plate 222.

[0144] According to some exemplary embodiments, in combination with referring to Figure 5A and Figure 5B, the distance D5 along the first direction X between the side of the first light source 131 away from the light guide plate 120 and the side of the first side plate 211 close to the light guide plate 120 is substantially equal to the distance D6 along the first direction X between the side of the second light source 132 away from the light guide plate 120 and the side of the second side plate 221 close to the light guide plate 120, so that the light-emitting area of the backlight module is approximately located at the central position along the first direction X, thereby enabling the light-emitting area of the backlight module to better align and match with the display area of the display panel assembled on the backlight module, and further improving the display uniformity of the display panel assembled on the backlight module.

[0145] According to some exemplary embodiments, referring to Figure 5E , the first frame 210 includes a first side plate 211 and a first rubber frame 213. The first side plate 211 is connected to the side of the back plate 110 away from the first light source 131, and the first rubber frame 213 is connected to the side of the first side plate 211 close to the first light source 131 and the side of the first side plate 211 away from the back plate 110. The side of the first rubber frame 213 away from the first light source 131 and the side of the first side plate 211 away from the first light source 131 are substantially flush, and the side of the first rubber frame 213 away from the back plate 110 is farther from the back plate 110 than the side of the first side plate 211 away from the back plate 110. The first rubber frame 213 is spaced from the first light source 131 along the first direction X, and the first rubber frame 213 is spaced from the first main body portion 311 along the first direction X, that is, the orthographic projection of the first rubber frame 213 on the back plate 110 is spaced from the orthographic projection of the first light source 131 on the back plate 110, and the orthographic projection of the first rubber frame 213 on the back plate 110 is spaced from the orthographic projection of the first main body portion 311 on the back plate 110. With such a setting, the first frame 210 includes a first side plate 211 and a first rubber frame 213, that is, the first frame 210 adopts a structure of integrated rubber and iron. By spacing the first rubber frame 213 from the first light source 131 and the first main body portion 311, it is possible to effectively avoid the problem of interference between the first light source 131 and the first frame 210 during the assembly of the backlight module.

[0146] According to some exemplary embodiments, with reference to Figure 5B and Figure 5E , the distance D17 along the first direction X between the side of the first rubber frame 213 close to the first light source 131 and the side of the first side plate 211 away from the first light source 131 is less than the distance D18 along the first direction X between the side of the second top plate close to the second light source 132 and the side of the second side plate away from the second light source 132.

[0147] According to some exemplary embodiments, with reference to Figure 5B and Figure 5E, the dimension D18 of the first rubber frame 213 along the third direction Z is substantially equal to the distance D2 between the side of the second top plate 222 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 along the third direction Z, so that the support height of the first frame 210 is consistent with the support height of the second frame 220.

[0148] Fig. 6A Schematically shows Figure 4 An enlarged view of area A1 in Figure 6B Schematically shows Fig. 6A A cross-sectional view taken along line EE'. Figure 6C Schematically shows Figure 4 Another enlarged view of area A1 in Figure 6C The cross-sectional view taken along line KK' in Figure 6B . Fig. 7A Schematically shows Figure 4 An enlarged view of area A2 in Figure 7B Schematically shows Fig. 7A A cross-sectional view taken along line FF'.

[0149] According to some exemplary embodiments, with reference to Figure 4 , Fig. 6A and Fig. 7A , the backlight module further includes a first circuit board 310 and a second circuit board 320. The first circuit board 310 includes a first main body portion 311 and a first connection portion 312. The first main body portion 311 extends along the second direction Y, and the first connection portion 312 extends along the first direction X. The first main body portion 311 is electrically connected to the first light source 131. One end of the first connection portion 312 is electrically connected to the first main body portion 311 and the other end extends out through the first hollow structure 141 in the first frame 210. The first main body portion 311 is used to access a light emission control signal to the first light source 131 so as to drive the first light source 131 to emit light. The first connection portion 312 extends out to the outside of the backlight module through the first hollow structure 141 in the first frame 210 and is electrically connected to external driving components. The second circuit board 320 includes a second main body portion 321 and a second connection portion 322. The second main body portion 321 extends along the second direction Y, and the second connection portion 322 extends along the first direction X. The second main body portion 321 is electrically connected to the second light source 132. One end of the second connection portion 322 is electrically connected to the second main body portion 321 and the other end extends out through the second hollow structure 142 in the second frame 220. The second main body portion 321 is used to access a light emission control signal to the second light source 132 so as to drive the second light source 132 to emit light. The second connection portion 322 extends out to the outside of the backlight module through the second hollow structure 142 in the second frame 220 and is electrically connected to external driving components.

[0150] With reference to Figure 5A and Figure 5B The orthographic projection of the first frame 210 on the backplane 110 is spaced apart from the orthographic projection of the first main body portion 311 on the backplane 110, and the orthographic projection of the second frame 220 on the backplane 110 at least partially overlaps with the orthographic projection of the second main body portion 321 on the backplane 110. Exemplarily, the orthographic projection of the first top plate 212 on the backplane 110 is spaced apart from the orthographic projection of the first main body portion 311 on the backplane 110, and the orthographic projection of the second top plate 222 on the backplane 110 at least partially overlaps with the orthographic projection of the second main body portion 321 on the backplane 110. By setting the orthographic projection of the first top plate 212 on the backplane 110 and the orthographic projection of the first main body portion 311 on the backplane 110 to be non-overlapping, interference between the first circuit board 310 connected to the first light source 131 and the first frame 210 during the assembly of the backlight module can be avoided. Additionally, during the assembly of the backlight module, the second light source 132 can be obliquely inserted between the second top plate 222 and the backplane 110, and even if there is an orthographic projection of the second top plate 222 on the backplane 110 and an orthographic projection of the second main body portion 321 on the backplane 110, it will not affect the assembly.

[0151] According to some exemplary embodiments, with reference to Figure 5A and Fig. 6A The first main body portion 311 is located between the first light source 131 and the backplane 110. The orthographic projection of the first light source 131 on the backplane 110 is within the orthographic projection of the first main body portion 311 on the backplane 110. The orthographic projection of the first main body portion 311 on the backplane 110 partially overlaps with the orthographic projection of the light guide plate 120 on the backplane 110. The first main body portion 311 is adhered to the side of the light guide plate 120 close to the backplane 110 by the second colloid 152. For example, the second colloid 152 includes a plurality of second colloid portions 152a spaced apart along the second direction Y, and the first main body portion 311 is adhered to the side of the light guide plate 120 close to the backplane 110 by the plurality of second colloid portions 152a.

[0152] According to some exemplary embodiments, with reference to Figure 5B and Figure 6B The second main body portion 321 is located between the second light source 132 and the backplane 110. The orthographic projection of the second light source 132 on the backplane 110 is within the orthographic projection of the second main body portion 321 on the backplane 110. The orthographic projection of the second main body portion 321 on the backplane 110 partially overlaps with the orthographic projection of the light guide plate 120 on the backplane 110. The second main body portion 321 is adhered to the side of the light guide plate 120 close to the backplane 110 by the third colloid 153. For example, the third colloid 153 includes a plurality of third colloid portions 153a spaced apart along the second direction Y, and the second main body portion 321 is adhered to the side of the light guide plate 120 close to the backplane 110 by the plurality of third colloid portions 153a.

[0153] According to some exemplary embodiments, referring to Figure 5A , the gap G1 between the orthographic projection of the first top plate 212 on the back plate 110 and the orthographic projection of the first main body portion 311 on the back plate 110 needs to be greater than or equal to a predetermined distance. This predetermined distance can be set with reference to the assembly accuracy of the first circuit board 310 and the forming accuracy of the first frame 210. For example, the assembly accuracy of the first circuit board 310 is 0.1 mm, and the forming accuracy of the first frame 210 is 0.05 mm. Therefore, this predetermined distance can be set to 0.15 mm. That is, the gap G1 between the orthographic projection of the first top plate 212 on the back plate 110 and the orthographic projection of the first main body portion 311 on the back plate 110 is set to be greater than or equal to 0.15 mm. With this setting, during assembly, interference between the first circuit board 310 and the first top plate 212 can be avoided. At the same time, the dimension D3 of the first top plate 212 along the first direction X can be made as large as possible.

[0154] According to some exemplary embodiments, with reference to Figure 5A , Fig. 6A and Figure 6B , the first hollow structure 141 extends from the first side plate 211 to the first top plate 212 and penetrates through the edge of the first top plate 212 close to the light guide plate 120 along the first direction X. That is, as shown in Fig. 6A , at the position where the first hollow structure 141 is schematically shown, the first side plate 211 and the first top plate 212 are completely removed. During the assembly process, the second connecting portion 322 can be first obliquely inserted between the second top plate 222 and the back plate 110 and passed through the second hollow structure 142 to the outside of the backlight module, and then the light guide plate 120 connected with structures such as the light source 130 and the circuit board is placed flat on the back plate 110. Since the first hollow structure 141 extends from the first side plate 211 through to the edge of the first top plate 212 close to the light guide plate 120, that is, the orthographic projection of the first connecting portion 312 on the back plate 110 does not overlap with the orthographic projection of the first frame 210 on the back plate 110, so that during the process of placing the light guide plate 120 flat on the back plate 110, the first connecting portion 312 will not interfere with the first frame 210.

[0155] According to some exemplary embodiments, referring to Fig. 6A , the dimension W1 of the first hollow structure 141 along the second direction Y is greater than the dimension W2 of the first connecting portion 312 along the second direction Y. For example, the dimension W1 of the first hollow structure 141 along the second direction Y > the dimension W2 of the first connecting portion 312 along the second direction Y + the manufacturing tolerance of the first hollow structure 141 + the manufacturing tolerance of the first circuit board 310 + the assembly tolerance of the first circuit board 310.

[0156] According to some exemplary embodiments, with reference to Fig. 7A and Figure 7B, the second hollow structure 142 is located in the second side plate 221, that is, the second hollow structure 142 is only provided in the second side plate 221 and will not be further extended from the second side plate 221 to the second top plate 222. The second hollow structure 142 provided in the second side plate 221 can enable the second connecting portion 322 to be obliquely inserted between the second top plate 222 and the back plate 110 and pass through the second hollow structure 142 to the outside of the backlight module during assembly, that is, on the basis of meeting the assembly requirements, the strength and support effect of the second frame 220 can be improved.

[0157] According to some exemplary embodiments, referring to Figure 7B , the plane of the second hollow structure 142 close to the back plate 110 is substantially flush with the plane of the back plate 110 close to the light guide plate 120, that is, at the second hollow structure 142, a part of the second side plate 221 close to the back plate 110 is completely removed, so that a step structure will not be formed, and there is no blocking structure when the second connecting portion 322 passes through the second hollow structure 142, thereby improving the assembly yield of the display module.

[0158] According to some exemplary embodiments, referring to Fig. 7A , the dimension W3 of the second hollow structure 142 in the second direction Y is greater than the dimension W4 of the second connecting portion 322 in the second direction Y. For example, the dimension W3 of the second hollow structure 142 in the second direction Y > the dimension W4 of the second connecting portion 322 in the second direction Y + the manufacturing tolerance of the second hollow structure 142 in the second direction Y + the manufacturing tolerance of the second circuit board 320 in the second direction Y + the assembly tolerance of the second circuit board 320 in the second direction Y.

[0159] According to some exemplary embodiments, with reference to Fig. 7A and Figure 7B , the dimension W5 of the second hollow structure 142 in the third direction Z needs to be greater than the dimension of the second connecting portion 322 in the third direction Z to ensure that the second connecting portion 322 can pass through the second hollow structure 142.

[0160] According to some exemplary embodiments, referring to Figure 7B , the dimension of the second hollow structure 142 in the third direction Z > the dimension of the second connecting portion 322 in the third direction Z + the manufacturing tolerance of the second hollow structure 142 in the third direction Z + the manufacturing tolerance of the second connecting portion 322 in the third direction Z + the operation height. Here, the operation height refers to the height of the space reserved additionally in the third direction Z when the second connecting portion 322 is inserted into the second hollow structure 142, and this operation height can be understood as the operation accuracy of the device for inserting the second connecting portion 322 into the second hollow structure 142.

[0161] For example, the dimension W5 of the second hollow structure 142 in the third direction Z may be smaller than the dimension W6 of the side surface of the second top plate 222 close to the back plate 110 and the side surface of the back plate 110 close to the second top plate 222 in the third direction Z. That is, at one side of the second hollow structure 142 close to the second top plate 222, a part of the second side plate 221 is still retained.

[0162] Fig.6D Schematically shows Figure 6C a side view of the first hollow structure in

[0163] According to some exemplary embodiments, with reference to Figure 5E 、 Figure 6B 、 Figure 6C and Fig.6D , the first hollow structure 141 includes a first hollow sub - part 1411 located in the first side plate 211 and a second hollow sub - part 1412 located in the first glue frame 213. The first hollow sub - part 1411 extends from the side of the first side plate 211 close to the back plate 110 in a direction away from the back plate 110 and penetrates through the edge of the first side plate 211 away from the back plate 110. That is, the first side plate 211 is truncated by the first hollow sub - part 1411 into two parts spaced apart in the second direction Y. The second hollow sub - part 1412 extends from the side of the first glue frame 213 close to the back plate 110 in a direction away from the back plate 110 and penetrates through the edge of the first glue frame 213 away from the back plate 110. That is, the first glue frame 213 is truncated by the second hollow sub - part 1412 into two parts spaced apart in the second direction Y. The first hollow sub - part 1411 and the second hollow sub - part 1412 are connected and communicate to form the first hollow structure 141. At this first hollow structure 141, the first side plate 211 and the first glue frame 213 are completely removed, so that during the assembly process, the first connecting portion 312 will not interfere with the first frame 210. Figure 8 Schematically shows Figure 4 an enlarged view of region A3 in Figure 8 Only schematically shows the light guide plate and the first light source located in region A3.

[0164] According to some exemplary embodiments, with reference to Figure 4 and Figure 8, at least one corner of the light guide plate 120 is a concave arc corner 12R, which is recessed towards the center of the light guide plate 120. At least one concave arc corner 12R is adjacent to the first light source 131. The orthographic projection of the concave arc corner 12R on the first frame 210 is spaced apart from or tangent to the orthographic projection of the first light source 131 on the first frame 210, that is, the orthographic projection of the light-emitting surface 131A of the first light source 131 on the first frame 210 does not overlap with the orthographic projection of the concave arc corner 12R on the first frame 210. Therefore, the setting of the concave arc corner 12R basically does not affect the incidence of light from the first light source 131 into the light guide plate 120. In addition, through research by the inventor, it is found that setting the corner of the light guide plate 120 as the concave arc corner 12R can further increase the size of the first light-incident surface (the plane extending along the second direction Y except for the corner in the side of the light guide plate 120 close to the first light source 131) of the light guide plate 120 along the second direction Y on the basis of meeting the assembly space requirements of the backlight module and the display panel, so as to increase the size of the first light source 131 along the second direction Y, and further improve the brightness of the backlight module.

[0165] It should be noted that the orthographic projection of the concave arc corner 12R on the first frame 210 being tangent to the orthographic projection of the first light source 131 on the first frame 210 should be understood as: the orthographic projection of the concave arc corner 12R on the first frame 210 does not overlap with the orthographic projection of the first light source 131 on the first frame 210, and a part of the edge of the orthographic projection of the concave arc corner 12R on the first frame 210 coincides with a part of the edge of the orthographic projection of the first light source 131 on the first frame 210.

[0166] It should be noted that through research by the inventor, it is found that if the corner of the light guide plate 120 is set as a convex arc corner (an arc corner protruding away from the center of the light guide plate 120), then on the basis of meeting the assembly space requirements of the backlight module and the same display panel, the size of the convex arc corner along the second direction Y will be larger than the size of the concave arc corner 12R along the second direction Y. Therefore, setting the corner of the light guide plate 120 as the concave arc corner 12R is beneficial to reducing the size of the corner of the light guide plate 120 along the second direction Y, and further increasing the size of the first light-incident surface of the light guide plate 120 along the second direction Y.

[0167] According to some exemplary embodiments, referring to Figure 8, the first light source 131 includes a plurality of light-emitting devices LED spaced apart along the second direction Y. The size of the light-emitting device LED along the second direction Y is the first size L1, the spacing between adjacent light-emitting devices LED along the second direction Y is the second size L2, and the size of the concave arc angle 12R along the second direction Y is the third size L3, and the third size L3 ≤ the first size L1 + the second size L2. That is, within this size range, the size of the concave arc angle 12R along the second direction Y is not sufficient to place one more light-emitting device LED, so that the number of light-emitting devices LED in the first light source 131 can be maximized.

[0168] According to some exemplary embodiments, at least one concave arc angle 12R is adjacent to the second light source 132, that is, at least one of the two corner portions on the right side as shown in Figure 4 is a concave arc angle 12R. The orthographic projection of the concave arc angle 12R on the second frame 220 is spaced apart from or tangent to the orthographic projection of the second light source 132 on the second frame 220. The setting method of the concave arc angle 12R adjacent to the second light source 132 is similar to the setting method of the concave arc angle 12R adjacent to the first light source 131, and will not be elaborated here.

[0169] For example, the four corner portions of the light guide plate 120 can all be set as concave arc angles 12R.

[0170] According to some exemplary embodiments, with reference to Fig. 7A and Figure 8 , the second light source 132 includes a plurality of light-emitting devices LED spaced apart along the second direction Y. The light-emitting devices LED in the second light source 132 have the same size as the light-emitting devices LED in the first light source 131, that is, the size of the concave arc angle 12R adjacent to the second light source 132 can be set with reference to the size of the concave arc angle 12R adjacent to the first light source 131, and will not be elaborated here.

[0171] According to some exemplary embodiments, with reference to Figure 8 , a third light source can be provided on at least one side of the light guide plate along the second direction. The third light source can include a plurality of light-emitting devices spaced apart along the first direction (the setting method of the third light source is described in detail later). In order to ensure that the size of the third light-emitting surface of the third light source along the first direction is larger, the fourth size L4 of the concave arc angle 12R along the first direction X can be set to ≤ the first size L1 + the second size L2.

[0172] According to some exemplary embodiments, with reference to Figure 5A, the backlight module further includes a first light source reflecting film 161 located on the side of the first light source 131 away from the back plate 110, a first colloid 151 located on the side of the first light source reflecting film 161 away from the back plate 110, and a diffusion film 171 located on the side of the first colloid 151 away from the back plate 110, and the diffusion film 171 extends from the side of the first colloid 151 away from the back plate 110 to the side of the light guide plate 120 away from the back plate 110. The first light source reflecting film 161 reflects the light emitted by the first light source 131 in the direction away from the back plate 110, so that more light can enter the light guide plate 120, that is, the light utilization rate of the first light source 131 is improved, and thus the brightness of the backlight module can be improved. At the same time, it can also effectively avoid the problem of light leakage in the display area of the display panel assembled to the display module. In addition, on the side of the light guide plate 120 away from the back plate 110, that is, on the light-emitting surface 12E of the light guide plate 120, a diffusion film 171 is provided, which can make the light incident into the light guide plate 120 more evenly distributed.

[0173] According to some exemplary embodiments, referring to Figure 5A , the side surface of the first light source reflecting film 161 close to the first side plate 211 is closer to the first side plate 211 than the side surface of the first light source 131 close to the first side plate 211, so that the first light source reflecting film 161 can reflect more light into the light guide plate 120.

[0174] According to some exemplary embodiments, referring to Figure 5A , the side surface of the first light source reflecting film 161 close to the first side plate 211, the side surface of the first colloid 151 close to the first side plate 211, and the side surface of the diffusion film 171 close to the first side plate 211 are substantially flush in the third direction Z. During the assembly process of the backlight module, the first light source reflecting film 161, the first colloid 151, and the diffusion film 171 are first assembled into an integrated composite film layer, and the edges are processed into a substantially flush structure, and then the composite film layer is assembled onto the light guide plate 120, which can simplify the assembly process and reduce the assembly defect rate.

[0175] According to some exemplary embodiments, referring to Figure 5A , the backlight module further includes a brightness enhancement film 172 located on the side of the diffusion film 171 away from the back plate 110. The side surface of the brightness enhancement film 172 away from the back plate 110 is substantially flush with the side surface of the first top plate 212 away from the back plate 110. With this setting, the brightness enhancement film 172 and the first top plate 212 can provide the same support height, so as to provide better support for the display panel assembled to the backlight module.

[0176] According to some exemplary embodiments, referring to Figure 5A, the brightness enhancement film 172 includes a first brightness enhancement film 1721 on the side of the diffusion film 171 away from the backplane 110, and a second brightness enhancement film 1722 on the side of the first brightness enhancement film 1721 away from the backplane 110. The side surface of the first brightness enhancement film 1721 close to the first frame 210 is substantially flush with the side surface of the diffusion film 171 close to the first frame 210 in the third direction Z. The side surface of the second brightness enhancement film 1722 close to the first frame 210 is farther from the first frame 210 than the side surface of the first light source reflection film 161 away from the first frame 210. The first brightness enhancement film 1721 includes a first portion 17211 on the side of the first light source reflection film 161 away from the backplane 110. The side surface of the first portion 17211 away from the backplane 110 is substantially flush with the side surface of the first top plate 212 away from the backplane 110, and the side surface of the first portion 17211 away from the backplane 110 is substantially flush with the side surface of the second brightness enhancement film 1722 away from the backplane 110. That is, through the thickness design of each film layer, the side surface of the first portion 17211 of the first brightness enhancement film 1721 away from the backplane 110, the side surface of the second brightness enhancement film 1722 away from the backplane 110, and the side surface of the first top plate 212 away from the backplane 110 can be made flush.

[0177] According to some exemplary embodiments, referring to Figure 5A , the backlight module further includes a light guide plate reflection film 173 located between the light guide plate 120 and the backplane 110.

[0178] According to some exemplary embodiments, referring to Figure 5B , the display module further includes a second light source reflection film 162 and a fourth colloid 154. The second light source reflection film 162 is adhered to the side surface of the second top plate 222 close to the backplane 110 through the fourth colloid 154. A part of the second light source reflection film 162 away from the second side plate 221 extends to the side surface of the light guide plate 120 away from the backplane 110. The second light source reflection film 162 can reflect the light emitted by the second light source 132 in the direction away from the backplane 110, so that more light can enter the light guide plate 120, that is, improve the light utilization rate of the second light source 132 and further improve the brightness of the backlight module.

[0179] According to some exemplary embodiments, referring to Figure 5B , one side of the diffusion film 171 close to the second side plate 221 extends to the side surface of the second light source reflection film 162 away from the backplane 110. The side surface of the first brightness enhancement film 1721 close to the second side plate 221 and the side surface of the second brightness enhancement film 1722 close to the second side plate 221 are substantially flush in the third direction Z, and the side surface of the first brightness enhancement film 1721 close to the second side plate 221 and the side surface of the second brightness enhancement film 1722 close to the second side plate 221 are farther from the second side plate 221 than the side surface of the second light source reflection film 162 away from the second side plate 221.

[0180] According to some exemplary embodiments, with reference to Figure 4 , Figure 5C and Figure 5D , the backlight module further includes a third frame 230 and a fourth frame 240 respectively located on both sides of the light guide plate 120 along the second direction Y. A third glue frame 181 is provided on the third frame 230, and a fourth glue frame 182 is provided on the fourth frame 240. No light source is provided at the third frame 230 and the fourth frame 240. Therefore, adding a glue frame structure at the third frame 230 and the fourth frame 240 can improve the strength of the third frame 230 and the fourth frame 240.

[0181] According to some exemplary embodiments, with reference to Figure 5C , the third frame 230 extends along the first direction X and is located on one side of the light guide plate 120 along the second direction Y. The third frame 230 includes a connected third side plate 231 and a third top plate 232. The third side plate 231 is connected to the side of the back plate 110 on the second direction Y side. The third side plate 231 can be disposed substantially perpendicular to the back plate 110. One side of the third top plate 232 is connected to the side of the third side plate 231 away from the back plate 110, and the other side extends in a direction close to the light guide plate 120. The third glue frame 181 is assembled to the third frame 230. The side of the third glue frame 181 away from the light guide plate 120 and the side of the third side plate 231 away from the light guide plate 120 are substantially flush in the third direction Z. The side of the third glue frame 181 close to the light guide plate 120 is closer to the light guide plate 120 than the side of the third top plate 232 close to the light guide plate 120.

[0182] According to some exemplary embodiments, with reference to Figure 5C , the third glue frame 181 includes a third glue frame main body portion 1811 and a third glue frame protrusion portion 1812 located on the side of the third glue frame main body portion 1811 away from the third top plate 232. The side of the third glue frame main body portion 1811 away from the back plate 110 is used to support the display panel assembled to the backlight module, and the third glue frame protrusion portion 1812 is used to protect the side of the display panel assembled to the backlight module.

[0183] According to some exemplary embodiments, with reference to Figure 5A and Figure 5C, the distance D7 along the third direction Z between the side of the third top plate 232 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 is less than the distance D1 along the third direction Z between the side of the first top plate 212 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120. The side of the third rubber frame main body portion 1811 away from the back plate 110 is substantially flush with the side of the first top plate 212 away from the back plate 110. The size D8 of the third top plate 232 along the second direction Y is less than the size D3 of the first top plate 212 along the first direction X. The function of the third top plate 232 is to increase the bonding strength between the third border 230 and the third rubber frame 181, and the function of the first top plate 212 is to support the display panel assembled to the backlight module. Therefore, D8 can be set to be less than D3.

[0184] According to some exemplary embodiments, with reference to Figure 4 and Figure 5C , first corner rubber frame portions 183 are further provided on both sides of the third rubber frame 181 along the first direction X. The first corner rubber frame portions 183 can be integrally formed with the third rubber frame 181. The side of the first corner rubber frame portion 183 away from the back plate 110 is substantially flush with the side of the third rubber frame convex portion 1812 away from the back plate 110. The first corner rubber frame portions 183 are used to protect the corners of the display panel assembled to the backlight module.

[0185] It should be noted that Figure 5C the first corner rubber frame portions 183 shown in Figure 4 are not located at the position indicated by the cut line CC’ in Figure 4 , and the first corner rubber frame portions 183 are located at the two upper corners shown in

[0186] According to some exemplary embodiments, with reference to Figure 4 and Figure 5D , the fourth border 240 extends along the first direction X and is located on the side of the light guide plate 120 away from the third border 230. The fourth border 240 includes a connected fourth side plate 241 and a fourth top plate 242. The fourth side plate 241 is connected to the side edge of the back plate 110 on one side in the second direction Y. The fourth side plate 241 can be disposed substantially perpendicular to the back plate 110. One side of the fourth top plate 242 is connected to the side edge of the fourth side plate 241 away from the back plate 110, and the other side extends toward the direction close to the light guide plate 120. The fourth rubber frame 182 is assembled to the fourth border 240. The side of the fourth rubber frame 182 away from the light guide plate 120 is substantially flush with the side of the fourth side plate 241 away from the light guide plate 120 in the third direction Z. The side of the fourth rubber frame 182 close to the light guide plate 120 is closer to the light guide plate 120 than the side of the fourth top plate 242 close to the light guide plate 120.

[0187] According to some exemplary embodiments, with reference to Figure 5C With Figure 5D , the side of the fourth top plate 242 away from the back plate 110 is substantially flush with the side of the third top plate 232 away from the back plate 110, and the side of the fourth rubber frame 182 away from the back plate 110 is substantially flush with the side of the third rubber frame main body 1811 away from the back plate 110.

[0188] According to some exemplary embodiments, with reference to Figure 5C and Figure 5D , the dimension D9 of the third rubber frame main body 1811 in the second direction Y is smaller than the dimension D10 of the fourth rubber frame 182 in the second direction Y. The display panel assembled to the backlight module has a bonding area. The bonding area of the display panel and the fourth rubber frame 182 are on the same side, and the frame width on the side of the display panel with the bonding area is larger. Therefore, the dimension D10 of the fourth rubber frame 182 in the second direction Y can be set larger, so as to better match the display panel and at the same time provide a better support effect for the side of the display panel with the bonding area. The dimension of the fourth top plate 242 can be the same as that of the third top plate 232, and the dimension of the fourth side plate 241 can be the same as that of the third side plate 231.

[0189] It should be noted that since the bonding area in the display panel is located on the fourth rubber frame 182, a flexible circuit board is connected to the display panel at the bonding area. If the fourth rubber frame 182 is provided with a protruding portion for protecting the side of the display panel with reference to the third rubber frame 181, the protruding portion will interfere with the flexible circuit board on the display panel. Therefore, there is no protruding portion on the side of the fourth rubber frame 182 away from the back plate 110.

[0190] According to some exemplary embodiments, with reference to Figure 4 , Figure 5C and Figure 5D , second corner rubber frame portions 184 are further provided on both sides of the fourth rubber frame 182 in the first direction X. The second corner rubber frame portions 184 can be integrally formed with the fourth rubber frame 182. The side of the second corner rubber frame portion 184 away from the back plate 110 is substantially flush with the side of the first corner rubber frame portion 183 away from the back plate 110. The second corner rubber frame portions 184 are used to protect the corners of the display panel assembled to the backlight module.

[0191] It should be noted that Figure 5D the second corner rubber frame portion 184 shown in Figure 4 is not located at the position indicated by the cutting line DD’ in Figure 4 , and the second corner rubber frame portion 184 is located at the two lower corners shown in

[0192] Fig. 9 Schematically shows an assembly flow chart of a backlight module according to some embodiments of the present disclosure.

[0193] Refer to Fig. 9 , Figure 4 The assembly process of the schematic backlight module may include the following steps S11 - S16.

[0194] In step S11, the glue - iron integrated structure and the light guide plate reflective film are loaded into the assembly equipment, and the assembly equipment completes the assembly of the light guide plate reflective film and the glue - body integrated structure.

[0195] It should be noted that the glue - iron integrated structure includes the backplane, the first frame, the second frame, the third frame, the fourth frame, the third glue frame, and the fourth glue frame mentioned above. The backplane, the first frame, the second frame, the third frame, and the fourth frame can be an integrally formed structure. The third glue frame is installed on the third frame, and the fourth glue frame is installed on the fourth frame.

[0196] In step S12, the light guide plate, the first light source connected to the first circuit board, and the second light source connected to the second circuit board are loaded into the assembly equipment. The assembly equipment assembles the first light source connected to the first circuit board and the second light source connected to the second circuit board on both sides of the light guide plate respectively to obtain a lamp - light guide integrated structure.

[0197] In step S13, one end of the lamp - light guide integrated structure is obliquely inserted into a predetermined position inside the glue - iron integrated structure, and then the lamp - light guide integrated structure is laid flat on the glue - iron integrated structure to obtain a semi - finished backlight module.

[0198] It should be noted that the steps of assembling the lamp - light guide integrated structure and the glue - iron integrated structure specifically include: obliquely inserting one side of the second circuit board of the lamp - light guide integrated structure to the second frame of the glue - iron integrated structure, and making the second connection part of the second circuit board extend out from the second hollow part in the second frame. Then, the lamp - light guide integrated structure is laid flat on the side of the light guide plate reflective film away from the backplane. During the laying - flat process, a part of the first connection part of the first circuit board will be located in the first hollow part of the first frame and extend outside the glue - iron integrated structure.

[0199] In step S14, the appearance of the semi - finished backlight module is inspected.

[0200] In step S15, the optical film material is assembled onto the semi - finished backlight module to obtain a backlight module.

[0201] It should be noted that the optical film material includes the first light source reflective film, the second light source reflective film, the diffusion film, the first brightness enhancement film, the second brightness enhancement film, etc. mentioned above.

[0202] In step S16, the backlight module is subjected to a lighting test.

[0203] Fig.10A plan view schematically showing the dot structure on the light guide plate in a backlight module according to some embodiments of the present disclosure. Fig.11 A distribution density trend diagram of the dot structure on the light guide plate in a backlight module according to some embodiments of the present disclosure is schematically shown. Among them, Fig.11 The leftmost end of the curve schematically shown represents the distribution density of the first dot closest to the first light source, and the rightmost end of the curve represents the distribution density of the first dot closest to the second light source.

[0204] According to some exemplary embodiments, with reference to Figure 5A and Fig.10 , a plurality of first dots 410 arranged in an array are provided on the side surface of the light guide plate 120 close to the back plate 110. The plurality of first dots 410 include a first dot portion 410A and a second dot portion 410B arranged along the first direction X. The first dot portion 410A is located on the side close to the first light source 131, and the second dot portion 410B is located on the side close to the second light source 132. The dimension of the first dot portion 410A along the first direction X is substantially the same as the dimension of the second dot portion 410B along the first direction X. In the first dot portion 410A, along the direction from the first light source 131 to the second light source 132, the distribution density of the first dots 410 gradually increases. In the second dot portion 410B, along the direction from the first light source 131 to the second light source 132, the distribution density of the first dots 410 gradually decreases. The plurality of first dots 410 in the first dot portion 410A are mainly used to regulate the propagation direction of the light incident from the first light source 131 into the light guide plate 120. The plurality of first dots 410 in the second dot portion 410B are mainly used to regulate the propagation direction of the light incident from the second light source 132 into the light guide plate 120. By respectively setting the distribution density of the first dots 410 in the first dot portion 410A and the second dot portion 410B, the brightness uniformity of the backlight module can be effectively improved.

[0205] According to some exemplary embodiments, with reference to Fig.10 , the plurality of first dots 410 include multiple columns of first dots 410 arranged along the first direction X. One column of first dots 410 includes a plurality of first dots 410 evenly spaced along the second direction Y. Among two columns of first dots 410, the distance between two adjacent first dots 410 in one column of first dots 410 along the second direction Y is equal to the distance between two adjacent first dots 410 in the other column of first dots 410 along the second direction Y. In the first dot portion 410A, along the direction from the first light source 131 to the second light source 132, the distance between two adjacent columns of first dots 410 along the first direction X gradually decreases. In the second dot portion 410B, along the direction from the first light source 131 to the second light source 132, the distance between two adjacent columns of first dots 410 along the first direction X gradually increases, so as to achieve Fig.11 Schematic distribution density change trend of the first dot pattern 410 where the distribution density first increases and then decreases along the direction from the first light source 131 to the second light source 132.

[0206] According to some exemplary embodiments, with reference to Fig.10 and Fig.11 , the inventors have found through research that in the direction from the first light source 131 to the second light source 132, setting the change trend of the distribution density of the first dot pattern 410 to present a parabolic distribution trend can further improve the brightness uniformity of the backlight module. That is, in the first dot pattern portion 410A, along the direction away from the first light source 131, the distribution density of the first dot pattern 410 gradually increases and the increasing rate gradually decreases. In the second dot pattern portion 410B, along the direction away from the second light source 132, the distribution density of the first dot pattern 410 gradually increases and the increasing rate gradually decreases.

[0207] For example, with reference to Fig.10 , in the first dot pattern portion 410A, among four adjacent columns of the first dot pattern 410, the distance between the column of the first dot pattern 410 closest to the first light source 131 and an adjacent column of the first dot pattern 410 along the first direction X is the first distance S1, the distance between the two middle columns of the first dot pattern 410 along the first direction X is the second distance S2, and the distance between the column of the first dot pattern 410 farthest from the first light source 131 and an adjacent column of the first dot pattern 410 along the first direction X is the third distance S3. The difference between the first distance S1 and the second distance S2 is greater than the difference between the second distance S2 and the third distance S3.

[0208] For example, with reference to Fig.10 , in the second dot pattern portion 410B, among four adjacent columns of the first dot pattern 410, the distance between the column of the first dot pattern 410 closest to the second light source 132 and an adjacent column of the first dot pattern 410 along the first direction X is the fourth distance S4, the distance between the two middle columns of the first dot pattern 410 along the first direction X is the fifth distance S5, and the distance between the column of the first dot pattern 410 farthest from the second light source 132 and an adjacent column of the first dot pattern 410 along the first direction X is the sixth distance S6. The difference between the fourth distance S4 and the fifth distance S5 is greater than the difference between the fifth distance S5 and the sixth distance S6.

[0209] It should be noted that the distance between two adjacent dot patterns can be understood as the distance between the orthographic projections of the same vertex of these two dot patterns on the backplane.

[0210] Fig. 12A Schematically shows a three-dimensional view of the first dot pattern on the light guide plate in the backlight module according to some embodiments of the present disclosure. Fig. 12B Schematically shows a cross-sectional view of the dot pattern structure on the light guide plate in the backlight module according to some embodiments of the present disclosure.

[0211] According to some exemplary embodiments, with reference to Fig.10 、 Fig. 12A and Fig. 12B , the shape of the first light point 410 includes a triangular pyramid. The first light point 410 includes a first bottom surface H1, a first edge M1, a second edge M2, and a third edge M3. The first bottom surface H1 is an isosceles triangle. The first edge M1 is connected to the intersection of the two waists in the first bottom surface H1, and the first edge M1 is perpendicular to the first bottom surface H1. The second edge M2 and the third edge M3 enclose a first side surface J1 with the bottom edge of the first bottom surface H1. The first light point 410 is recessed from the side of the light guide plate 120 close to the back plate 110 in a direction away from the back plate 110, and the first bottom surface H1 is substantially flush with the side of the light guide plate 120 close to the back plate 110. In the first light point portion 410A, the first side surface J1 of the first light point 410 faces the light emitting surface 131A of the first light source 131. When the light rays emitted by the first light source 131 and incident into the light guide plate 120 further reach the first side surface J1, total internal reflection can occur. The light rays reflected by the first side surface J1 will propagate towards the light emitting surface 12E of the light guide plate 120, pass through the light emitting surface 12E of the light guide plate 120, and then be emitted outside the backlight module. In the second light point portion 410B, the first side surface J1 of the first light point 410 faces the light emitting surface 132A of the second light source 132. When the light rays emitted by the second light source 132 and incident into the light guide plate 120 further reach the first side surface J1, total internal reflection can occur. The light rays reflected by the first side surface J1 will propagate towards the light emitting surface 12E of the light guide plate 120, pass through the light emitting surface 12E of the light guide plate 120, and then be emitted outside the backlight module. By setting the structure and the installation orientation of the first light point 410, the brightness and the brightness uniformity of the backlight module can be effectively improved.

[0212] It should be supplementary explained that the fact that the first bottom surface H1 is substantially flush with the side of the light guide plate 120 close to the back plate 110 should be understood as that the first bottom surface H1 is flush with the part of the side of the light guide plate 120 close to the back plate 110 where the first light point 410 is not provided.

[0213] According to some exemplary embodiments, with reference to Fig.10 and Fig. 12A , in the first light point portion 410A, the side edge K1 where the first side surface J1 is connected to the first bottom surface H1 is parallel to the light emitting surface 131A of the first light source 131. In the second light point portion 410B, the side edge K1 where the first side surface J1 is connected to the first bottom surface H1 is parallel to the light emitting surface 132A of the second light source 132.

[0214] The inventor further studies and finds that when the first light point 410 is arranged according to Fig.10When the structure shown is set, a dark band extending along the second direction Y is formed at the intersection of the first halftone dot portion 410A and the second halftone dot portion 410B. The dark band can be effectively eliminated by adjusting the setting angle of the first halftone dot 410 .

[0215] Fig. 12C A plan view schematically illustrates a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0216] According to some exemplary embodiments, in combination with reference Figure 4 , Fig. 12A and Fig. 12C In the first dot portion 410A, the first side surface J1 of the first dot 410 faces the light-emitting surface 131A of the first light source 131 and the third frame 230, and the angle between the side edge K1 connecting the first side surface J1 and the first bottom surface H1 and the light-emitting surface 131A of the first light source 131 is the first angle α1. In the second dot portion 410B, the first side surface J1 of the first dot 410 faces the light-emitting surface 132A of the second light source 132 and the fourth frame 240, and the angle between the side edge K1 connecting the first side surface J1 and the first bottom surface H1 and the light-emitting surface 132A of the second light source 132 is the second angle α2. The first angle α1 is substantially equal to the second angle α2, and the first angle α1 and the second angle α2 are acute angles. By rotating the first dot 410 in the first dot portion 410A and the first dot 410 in the second dot portion 410B counterclockwise and clockwise by a certain angle respectively, more light can be directed to the boundary area between the first dot portion 410A and the second dot portion 410B, thereby effectively avoiding the occurrence of dark band defects at this location.

[0217] As a supplementary explanation, the rotation direction of the first dot 410 located in the first dot portion 410A may be swapped with the rotation direction of the first dot 410 located in the second dot portion 410B, that is, the first side surface J1 of the first dot 410 in the first dot portion 410A faces the light emitting surface 131A of the first light source 131 and the fourth frame 240, and the first side surface J1 of the first dot 410 in the second dot portion 420 faces the light emitting surface 132A of the second light source 132 and the third frame 230, thereby achieving basically the same improvement effect.

[0218] According to some exemplary embodiments, the magnitudes of the first included angle α1 and the second included angle α2 depend on the types of the first light source 131, the second light source 132, and the light guide plate. For example, when the beam angle of the light emitted by the light-emitting device LED in the first light source 131 and the second light source 132 is 120°, and the thickness of the light guide plate 120 perpendicular to the light-emitting surface of the light guide plate 120 is greater than the dimensions of the first light source 131 and the second light source 132 perpendicular to the light-emitting surface of the light guide plate 120, the first included angle α1 and the second included angle α2 can be respectively set to 25° - 35°. Exemplarily, both the first included angle α1 and the second included angle α2 are 30°.

[0219] According to some exemplary embodiments, with reference to Fig. 12A and Fig. 12B , the apex angle β1 of the first bottom surface H1 is an obtuse angle, and the included angle β2 between the first bottom surface H1 and the first side surface J1 is 45°. With such a setting, the area of the first side surface J1 can be relatively large and at a suitable angle, which is beneficial to further improving the brightness and brightness uniformity of the backlight module.

[0220] According to some exemplary embodiments, with reference to Fig. 12A and Fig. 12B , the apex angle β1 of the first bottom surface H1 can be 120°, and the length of the waist of the first bottom surface H1 is twice the length of the first edge M1, so that the included angle β2 between the first bottom surface H1 and the first side surface J1 is 45°.

[0221] Fig.13 Schematically shows a plan view of a backlight module according to some embodiments of the present disclosure. Fig.14A Schematically shows a cross-sectional view taken along the Fig.13 center line GG'. Fig. 14B Schematically shows a cross-sectional view taken along the Fig.13 center line HH'.

[0222] According to some exemplary embodiments, with reference to Fig.13 , the display module includes a first light source 131 and a second light source 132 located on both sides of the light guide plate 120 along the first direction X. First frames 210 and second frames 220 are connected and provided on both sides of the back plate 110 along the first direction X. The cross-sectional structures at the first frames 210 and the first light source 131 can be referred to Figure 5A or Figure 5E , and the cross-sectional structures at the second frames 220 and the second light source 132 can be referred to Figure 5B , which will not be elaborated here.

[0223] With reference to Fig.13 and Fig.14A, the light guide plate 120 further includes a third light incident surface 12C, which is located on one side of the light guide plate 120 in the second direction Y. The backlight module further includes a third light source 133 and a third frame 230. The third light source 133 is located on one side of the light guide plate 120 along the second direction Y. The light emitting surface 133A of the third light source 133 faces the third light incident surface 12C, and the third light source 133 emits light into the light guide plate 120 from the third light incident surface 12C.

[0224] The third frame 230 extends along the first direction X and is located on the side of the third light source 133 away from the light guide plate 120. The third frame 230 includes a third side plate 231 and a third top plate 232. The third side plate 231 is connected to the side of the back plate 110 away from the third light source 133, and the third side plate 231 can be disposed substantially perpendicular to the back plate 110. One side of the third top plate 232 is connected to the side of the third side plate 231 away from the back plate 110, and the other side extends toward the direction close to the light guide plate 120. The third top plate 232 is disposed substantially parallel to the back plate 110. The third top plate 232, the third side plate 231 and the back plate 110 form a U-shaped structure, and when the backlight module is assembled with the display panel, the U-shaped structure can be used to support one side of the display panel.

[0225] With reference to Figure 5A , Figure 5B and Fig.14A , the distance D11 between the side surface of the third top plate 232 away from the back plate 110 and the side surface of the back plate 110 close to the light guide plate 120 along the third direction Z is substantially equal to the distance D1 between the side surface of the first top plate 212 away from the back plate 110 and the side surface of the back plate 110 close to the light guide plate 120 along the third direction Z and the distance D2 between the side surface of the second top plate 222 away from the back plate 110 and the side surface of the back plate 110 close to the light guide plate 120 along the third direction Z. That is, the side surface of the third top plate 232 away from the back plate 110, the side surface of the first top plate 212 away from the back plate 110 and the side surface of the second top plate 222 away from the back plate 110 are substantially located at the same height. The dimension D12 of the third top plate 232 along the second direction Y is smaller than the dimension D4 of the second top plate 222 along the first direction X. The dimension D12 of the third top plate 232 along the second direction Y can be equal to the dimension D3 of the first top plate 212 along the first direction X. The orthographic projection of the third top plate 232 on the back plate 110 is spaced from the orthographic projection of the third light source 133 on the back plate 110.

[0226] It should be noted that the structural design at the third frame 230 is substantially the same as the structural design at the first frame 210, so that during the assembly of the backlight, the third light source 133 will not interfere with the third frame 230.

[0227] According to some exemplary embodiments, with reference to Fig.13 and Fig.14A, the backlight module further includes a third circuit board 330. The third circuit board 330 includes a third main body portion 331. The third main body portion 331 extends along the first direction X. The third main body portion 331 is electrically connected to the third light source 133. The third main body portion 331 is configured to access a light emission control signal to the first light source 131 so as to drive the third light source 133 to emit light. The positive projection of the third top plate 232 on the back plate 110 is spaced apart from the positive projection of the third main body portion 331 on the back plate 110. By setting the positive projection of the third top plate 232 on the back plate 110 and the positive projection of the third main body portion 331 on the back plate 110 not to overlap, it is possible to avoid interference between the third circuit board 330 connected to the third light source 133 and the third frame 230 during the assembly process of the backlight module.

[0228] According to some exemplary embodiments, with reference to Fig.14A , the third main body portion 331 is located between the third light source 133 and the back plate 110. The positive projection of the third light source 133 on the back plate 110 is located within the positive projection of the third main body portion 331 on the back plate 110. The positive projection of the third main body portion 331 on the back plate 110 partially overlaps with the positive projection of the light guide plate 120 on the back plate 110. The third main body portion 331 is adhered to the side surface of the light guide plate 120 close to the back plate 110 through a fifth colloid 155.

[0229] It should be understood that, in combination with reference to Fig.13 and Fig.14A , the third circuit board 330 also includes a third connection portion 332 connected to the third main body portion 331. A third hollow structure is also provided in the third frame 230. The third connection portion 332 extends out from the third hollow structure. The specific structures of the third connection portion 332 and the third hollow structure can be set with reference to the first connection portion 312 and the first hollow structure 141 located in the first frame 210, which will not be elaborated here.

[0230] According to some exemplary embodiments, in combination with reference to Fig.13 and Fig. 14B, the backlight module further includes a fourth border 240. The fourth border 240 is located on a side of the light guide plate 120 away from the third border 230, and the fourth border 240 extends along the first direction X. The fourth border 240 includes a fourth side plate 241 and a fourth top plate 242. The fourth side plate 241 is connected to a side of the back plate 110 away from the third border 230, and the fourth side plate 241 can be disposed substantially perpendicular to the back plate 110. One side of the fourth top plate 242 is connected to a side of the fourth side plate 241 away from the back plate 110, and the other side extends in a direction close to the light guide plate 120. The fourth top plate 242 can be disposed substantially parallel to the back plate 110. The fourth top plate 242, the fourth side plate 241 and the back plate 110 form a U-shaped structure. When assembling the backlight module with the display panel, the U-shaped structure can be used to support one side of the display panel.

[0231] With reference to Figure 5B and Fig. 14B , the dimension D13 of the fourth top plate 242 along the second direction Y is smaller than the dimension D4 of the second side plate 221 along the first direction X. The orthographic projection of the fourth top plate 242 on the back plate 110 is spaced apart from the orthographic projection of the light guide plate 120 on the back plate 110, so as to avoid interference between the fourth border 240 and the light guide plate 120 during the assembly process of the backlight module.

[0232] According to some exemplary embodiments, with reference to Fig.14A and Fig. 14B , the distance D14 between the side of the fourth top plate 242 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 along the third direction Z is substantially equal to the distance D11 between the side of the third top plate 232 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 along the third direction Z. That is, the side of the fourth top plate 242 away from the back plate 110 and the side of the third top plate 232 away from the back plate 110 are substantially at the same height. The fourth top plate 242 can support the display panel assembled to the backlight module, and a rubber frame structure may not be provided at the fourth border 240, thereby reducing the manufacturing cost of the backlight module.

[0233] Fig. 14C Schematically shows Fig.13 an enlarged view of area A4 in Fig. 14C Only schematically shows the light guide plate, the first light source and the third light source located in area A4.

[0234] According to some exemplary embodiments, with reference to Fig.13 and Fig. 14C , at least one corner of the light guide plate 120 adjacent to the third light source 133 is an inward concave arc corner 12R (for example, it can be Fig. 14C(the corner located between the first light source 131 and the third light source 133 as shown in the figure), the positive projection of the concave arc-shaped corner 12R on the third frame 230 is spaced apart from or tangent to the positive projection of the third light source 133 on the third frame 230, that is, the positive projection of the light-emitting surface 133A of the third light source 133 on the third frame 230 does not overlap with the positive projection of the concave arc-shaped corner 12R on the third frame 230. Therefore, the setting of the concave arc-shaped corner 12R basically does not affect the incidence of light from the third light source 133 into the light guide plate 120. In addition, through research by the inventor, it is found that setting the corner of the light guide plate 120 as the concave arc-shaped corner 12R can, on the basis of meeting the assembly space requirements of the backlight module and the display panel, further make the size of the third light-incident surface (the plane extending along the second direction Y except for the corner in the side of the light guide plate 120 close to the third light source 133) of the light guide plate 120 larger along the second direction Y, so as to increase the size of the third light source 133 along the second direction Y, and further improve the brightness of the backlight module.

[0235] According to some exemplary embodiments, referring to Fig. 14C , the third light source 133 includes a plurality of light-emitting devices LED distributed at intervals along the first direction X. The size of the light-emitting device LED along the first direction X is the first size L1, the distance between adjacent light-emitting devices LED along the first direction X is the second size L2, and the size of the concave arc-shaped corner 12R along the first direction X is the fourth size L3, and the fourth size L4 ≤ the first size L1 + the second size L2. That is, within this size range, the size of the concave arc-shaped corner 12R along the first direction X is not sufficient to place one more light-emitting device LED, so that the number of light-emitting devices LED in the third light source 133 can be maximized.

[0236] Fig.15 Schematically shows an assembly flow chart of a backlight module according to some embodiments of the present disclosure.

[0237] Referring to FIG. 5, Fig.13 The assembly process of the schematically shown backlight module may include the following steps S21 - S26:

[0238] In step S21, the iron frame structure and the light guide plate reflective film are loaded into the assembly equipment, and the assembly equipment completes the assembly of the light guide plate reflective film and the iron frame structure.

[0239] It should be noted that the iron frame structure includes the back plate, the first frame, the second frame, the third frame, and the fourth frame mentioned above. The back plate, the first frame, the second frame, the third frame, and the fourth frame may be an integrally formed structure.

[0240] In step S22, a light guide plate, a first light source connected to a first circuit board, a second light source connected to a second circuit board, and a third light source connected to a third circuit board are loaded into an assembly device, and the assembly device respectively assembles the first light source connected to the first circuit board, the second light source connected to the second circuit board, and the third light source connected to the third circuit board to the outside of the light guide plate to obtain a light guide integrated structure.

[0241] In step S23, one end of the light guide integrated structure is obliquely inserted into a predetermined position inside the iron frame structure, and then the light guide integrated structure is placed flat on the iron frame structure to obtain a semi-finished backlight module.

[0242] It should be noted that the step of assembling the light guide integrated structure and the iron frame structure specifically includes: obliquely inserting one side of the second circuit board of the light guide integrated structure into the second side frame of the iron frame structure, and enabling the second connection part of the second circuit board to protrude from the second hollow part in the second side frame, and then placing the light guide integrated structure flat on the side of the reflective film away from the backplane. During the process of placing it flat, a part of the first connection part of the first circuit board will be located in the first hollow part of the first side frame and extend outside the glue-iron integrated structure, and a part of the third connection part of the third circuit board will be located in the third hollow part of the third side frame and extend outside the iron frame structure.

[0243] In step S24, an appearance inspection is performed on the semi-finished backlight module.

[0244] In step S25, an optical film material is assembled onto the semi-finished backlight module to obtain a backlight module.

[0245] It should be noted that the optical film material includes the first light source reflective film, the second light source reflective film, the diffusion film, the first brightness enhancement film, the second brightness enhancement film, etc. mentioned above.

[0246] In step S26, a lighting test is performed on the backlight module.

[0247] Fig.16 Schematically shows a plan view of the dot structure on the light guide plate in a backlight module according to some embodiments of the present disclosure. Fig.17 Schematically shows a distribution density trend graph of the dot structure on the light guide plate in a backlight module according to some embodiments of the present disclosure. Among them, Fig.17 The leftmost end of the curve shown schematically represents the distribution density of the second dot closest to the third light source, and the rightmost end of the curve represents the distribution density of the second dot farthest from the third light source.

[0248] According to some exemplary embodiments, with reference to Fig.14A and Fig.16, a plurality of second light dots 420 arranged in an array are provided on the side of the light guide plate 120 close to the back plate 110, and the distribution density of the second light dots 420 gradually increases in the direction away from the third light source 133. By setting the distribution density of the second light dots 420 according to this trend, the brightness uniformity of the backlight module can be effectively improved.

[0249] According to some exemplary embodiments, referring to Fig.16 , the plurality of second light dots 420 include multiple rows of second light dots 420 arranged along the second direction Y, and one row of second light dots 420 includes a plurality of second light dots 420 evenly spaced along the first direction X. Among two rows of second light dots 420, the distance between two adjacent second light dots 420 in one row of second light dots 420 along the first direction X is equal to the distance between two adjacent second light dots 420 in the other row of second light dots 420 along the first direction X. In the direction away from the third light source 133, the distance between two adjacent rows of second light dots 420 gradually decreases, so as to achieve Fig.17 the distribution density change trend that the distribution density of the second light dots 420 gradually increases in the direction away from the third light source 133 as shown schematically.

[0250] According to some exemplary embodiments, in combination with referring to Fig.16 and Fig.17 , the inventor has found through research that in the direction away from the third light source 133, setting the change trend of the distribution density of the first light dots 410 as Fig.17 the non-linear distribution change trend shown schematically can further improve the brightness uniformity of the backlight module. That is, in the direction away from the third light source 133, the distribution density of the second light dots 420 gradually increases and the increasing rate gradually increases.

[0251] For example, referring to Fig.16 , among four adjacent rows of second light dots 420, the distance between the row of first light dots 410 closest to the third light source 133 and the adjacent row of first light dots 410 is the seventh distance S7, the distance between the two rows of first light dots 410 in the middle is the eighth distance S8, and the distance between the row of first light dots 410 farthest from the third light source 133 and the adjacent row of first light dots 410 is the ninth distance S9. The seventh distance S7 is greater than the eighth distance S8, the eighth distance S8 is greater than the ninth distance S9, and the difference between the seventh distance S7 and the eighth distance S8 is less than the difference between the eighth distance S8 and the ninth distance S9.

[0252] Fig.18A Schematically shows a three-dimensional view of the second light dots on the light guide plate in the backlight module according to some embodiments of the present disclosure. Fig.18B Schematically shows a cross-sectional view of the dot structure on the light guide plate in the backlight module according to some embodiments of the present disclosure.

[0253] According to some exemplary embodiments, with reference to Fig.16 , Fig.18A and Fig.18B , the shape of the second light point 420 includes a triangular pyramid. The second light point 420 includes a second bottom surface H2, a fourth edge M4, a fifth edge M5 and a sixth edge M6. The shape of the second bottom surface H2 is an isosceles triangle. The fourth edge M4 is connected to the intersection of the two waists of the second bottom surface H2, and the fourth edge M4 is perpendicular to the second bottom surface H2. The fifth edge M5, the sixth edge M6 and the bottom edge of the second bottom surface H2 enclose a second side surface J2. The fourth edge M4, the sixth edge M6 and the bottom edge of the second bottom surface H2 enclose a third side surface J3. The fourth edge M4, the fifth edge M5 and the bottom edge of the second bottom surface H2 enclose a third side surface J3. The second light point 420 is recessed from the side of the light guide plate 120 close to the back plate 110 in a direction away from the back plate 110, and the second bottom surface H2 is substantially flush with the side of the light guide plate 120 close to the back plate 110. The second side surface J2 faces the third light source 133, and the side edge K2 where the second side surface J2 is connected to the second bottom surface H2 is parallel to the light-emitting surface 133A of the third light source 133. The third side surface J3 is perpendicular to the second bottom surface H2. The third side surface J3 faces the first light source 131 and the included angle between the third side surface J3 and the light-emitting surface 131A of the first light source 131 is a third included angle α3. The fourth side surface J4 is perpendicular to the second bottom surface H2. The fourth side surface J4 faces the second light source 132 and the included angle between the fourth side surface J4 and the light-emitting surface 132A of the second light source 132 is a fourth included angle α4. The third included angle α3 and the fourth included angle α4 are substantially equal. With such a setting, the third side surface J3 can reflect the light rays incident from the first light source 131 into the light guide plate 120 in a direction away from the third light source 133. The fourth side surface J4 can reflect the light rays incident from the second light source 132 into the light guide plate 120 in a direction away from the third light source 133. The second side surface J2 can reflect the light rays incident from the third light source 133 into the light guide plate 120 in a direction close to the light-emitting surface 12E of the light guide plate 120. By providing the second light point 420, the light rays incident from the first light source 131, the second light source 132 and the third light source 133 into the light guide plate 120 can be respectively regulated, so that the brightness and brightness uniformity of the backlight module can be improved.

[0254] It should be further noted that the fact that the second bottom surface H2 is substantially flush with the side of the light guide plate 120 close to the back plate 110 should be understood as that the second bottom surface H2 is flush with the part of the side of the light guide plate 120 close to the back plate 110 where the second light point 420 is not provided.

[0255] According to some exemplary embodiments, with reference to Fig.16 and Fig.18A, the apex angle β3 of the second bottom surface H2 is an acute angle. For example, the apex angle β3 of the second bottom surface H2 is 60°, and the second bottom surface H2 is an equilateral triangle. Through research by the inventor, it is found that setting the apex angle β3 of the second bottom surface H2 as an acute angle, such that both the third included angle α3 and the fourth included angle α4 are 30°, can more effectively improve the brightness and brightness uniformity of the backlight module.

[0256] According to some exemplary embodiments, with reference to Fig.18A and Fig.18B , the dimension of the second bottom surface H2 along the second direction Y is equal to the length of the fourth edge M4. With this setting, the included angle β4 between the second side surface J2 and the second bottom surface H2 is 45°, thereby more effectively improving the brightness and brightness uniformity of the backlight module.

[0257] Fig.19 Schematically shows a plan view of a backlight module according to some embodiments of the present disclosure. Fig. 20 Schematically shows a cross-sectional view taken along the Fig.19 center line JJ’.

[0258] According to some exemplary embodiments, with reference to Fig.19 , the display module includes a first light source 131 and a second light source 132 located on both sides of the light guide plate 120 along the first direction X. First frames 210 and second frames 220 are connected and provided on both sides of the backplane 110 along the first direction X. The cross-sectional structure at the first frame 210 and the first light source 131 can be referred to Figure 5A or Figure 5E , and the cross-sectional structure at the second frame 220 and the second light source 132 can be referred to Figure 5B , which will not be elaborated here.

[0259] Continuing to refer to Fig.19 , the display module includes a third light source 133 and a fourth light source 134 located on both sides of the light guide plate 120 along the second direction Y. Third frames 230 and fourth frames 240 are connected and provided on both sides of the backplane 110 along the second direction Y. The cross-sectional structure at the third frame 230 and the third light source 133 can be referred to Fig.14A , which will not be elaborated here. The cross-sectional structure at the fourth frame 240 and the fourth light source 134 will be described later.

[0260] With reference to Fig.19 and Fig. 20 , the light guide plate 120 further includes a fourth light incident surface 12D. The fourth light incident surface 12D is located on the side of the light guide plate 120 away from the third light incident surface 12C. The fourth light source 134 is located on one side of the light guide plate 120 along the second direction Y. The light emitting surface of the fourth light source 134 faces the fourth light incident surface 12D, and the fourth light source 134 emits light into the light guide plate 120 from the fourth light incident surface 12D.

[0261] The fourth frame 240 extends along the first direction X and is located on the side of the fourth light source 134 away from the light guide plate 120. The fourth frame 240 includes a fourth side plate 241 and a fourth top plate 242. The fourth side plate 241 is connected to the side of the back plate 110 away from the fourth light source 134, and the fourth side plate 241 can be disposed substantially perpendicular to the back plate 110. One side of the fourth top plate 242 is connected to the side of the fourth side plate 241 away from the back plate 110, and the other side extends in a direction close to the light guide plate 120. The fourth top plate 242 is disposed substantially parallel to the back plate 110. The fourth top plate 242, the fourth side plate 241 and the back plate 110 form a U-shaped structure. When assembling the backlight module with the display panel, this U-shaped structure can be used to support one side of the display panel.

[0262] With reference to Figure 5A 、 Figure 5B and Fig. 20 , the distance D15 along the third direction Z between the side of the fourth top plate 242 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 is substantially equal to the distance D1 along the third direction Z between the side of the first top plate 212 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120 and the distance D2 along the third direction Z between the side of the second top plate 222 away from the back plate 110 and the side of the back plate 110 close to the light guide plate 120. That is, the side of the fourth top plate 242 away from the back plate 110, the side of the first top plate 212 away from the back plate 110 and the side of the second top plate 222 away from the back plate 110 are substantially at the same height. The dimension D16 of the fourth top plate 242 along the second direction Y is less than the dimension D4 of the second top plate 222 along the first direction X. The dimension D15 of the fourth top plate 242 along the second direction Y can be equal to the dimension D3 of the first top plate 212 along the first direction X. The orthographic projection of the fourth top plate 242 on the back plate 110 is spaced apart from the orthographic projection of the fourth light source 134 on the back plate 110.

[0263] It should be noted that the structural design at the fourth frame 240 is substantially the same as the structural designs at the first frame 210 and the third frame 230, so that during the assembly of the backlight, the fourth light source 134 will not interfere with the fourth frame 240.

[0264] According to some exemplary embodiments, with reference to Fig.13 and Fig.14A, the backlight module further includes a fourth circuit board 340. The fourth circuit board 340 includes a fourth main body portion 341. The fourth main body portion 341 extends along the first direction X. The fourth main body portion 341 is electrically connected to the fourth light source 134. The fourth main body portion 341 is configured to access a light emission control signal to the fourth light source 134 so as to drive the fourth light source 134 to emit light. The orthographic projection of the fourth top plate 242 on the back plate 110 is spaced apart from the orthographic projection of the fourth main body portion 341 on the back plate 110. By setting the orthographic projection of the fourth top plate 242 on the back plate 110 and the orthographic projection of the fourth main body portion 341 on the back plate 110 not to overlap, it is possible to avoid interference between the fourth circuit board 340 connected to the fourth light source 134 and the fourth frame 240 during the process of assembling the light source 130 and the light guide plate 120.

[0265] According to some exemplary embodiments, referring to Fig.14A , the fourth main body portion 341 is located between the fourth light source 134 and the back plate 110. The orthographic projection of the fourth light source 134 on the back plate 110 is located within the orthographic projection of the fourth main body portion 341 on the back plate 110. The orthographic projection of the fourth main body portion 341 on the back plate 110 partially overlaps with the orthographic projection of the light guide plate 120 on the back plate 110. The fourth main body portion 341 is adhered to the side surface of the light guide plate 120 close to the back plate 110 by a sixth colloid 156.

[0266] It should be understood that, in combination with referring to Fig.13 and Fig.14A , the fourth circuit board 340 also includes a fourth connection portion connected to the fourth main body portion 341. A fourth hollow structure is also provided in the fourth frame 240. The fourth connection portion extends out from the fourth hollow structure. The specific structures of the fourth connection portion and the fourth hollow structure can be set with reference to the first connection portion 312 and the first hollow structure 141 located in the first frame 210, which will not be elaborated here.

[0267] Fig.21 Schematically shows a plan view of a dot structure on a light guide plate in a backlight module according to some embodiments of the present disclosure.

[0268] According to some exemplary embodiments, in combination with referring to Fig. 20 and Fig.21 , a plurality of third dots 430 arranged in an array are provided on the side surface of the light guide plate 120 close to the back plate 110. The plurality of third dots 430 are evenly distributed. It has been found by the inventor that such an arrangement is more conducive to improving the brightness uniformity of the backlight module.

[0269] For example, referring to Fig.21, a plurality of third dot patterns 430 include multiple rows of third dot patterns 430 arranged along the second direction Y, and one row of third dot patterns 430 includes a plurality of third dot patterns 430 evenly spaced along the first direction X. Among two rows of third dot patterns 430, the distance between two adjacent second dot patterns 420 in one row of third dot patterns 430 along the first direction X is equal to the distance between two adjacent second dot patterns 420 in the other row of second dot patterns 420 along the first direction X. Moreover, among three adjacent rows of third dot patterns 430, the distance between two adjacent rows of third dot patterns 430 along the second direction Y is equal to the distance between another two adjacent rows of third dot patterns 430 along the second direction Y.

[0270] Fig.22A Schematically shows a perspective view of the third dot patterns on the light guide plate in a backlight module according to some embodiments of the present disclosure. Fig. 22B Schematically shows a cross-sectional view of the dot pattern structure on the light guide plate in a backlight module according to some embodiments of the present disclosure.

[0271] According to some exemplary embodiments, with reference to Fig.21 , Fig.22A and Fig. 22B , the shape of the third dot pattern 430 includes a quadrangular pyramid. The third dot pattern 430 includes a third bottom surface H3, and the third bottom surface H3 is a rhombus. The orthographic projection of the vertex Q of the third dot pattern 430 far from the third bottom surface H3 on the third bottom surface H3 coincides with the geometric center of the third bottom surface H3. The third dot pattern 430 is recessed from the side surface of the light guide plate 120 close to the back plate 110 in a direction away from the back plate 110, and the third bottom surface H3 is substantially flush with the side surface of the light guide plate 120 close to the back plate 110. The third bottom surface H3 includes a first diagonal line N1 and a second diagonal line N2. The first diagonal line N1 is parallel to the light-emitting surface 131A of the first light source 131 and the light-emitting surface 132A of the second light source 132, and the second diagonal line N2 is parallel to the light-emitting surface 133A of the third light source 133 and the light-emitting surface 134A of the fourth light source 134. With such an arrangement, the brightness and brightness uniformity of the backlight module can be further improved.

[0272] It should be additionally noted that the fact that the third bottom surface H3 is substantially flush with the side surface of the light guide plate 120 close to the back plate 110 should be understood as that the third bottom surface H3 is flush with the part of the side surface of the light guide plate 120 close to the back plate 110 where no third dot pattern 430 is provided.

[0273] According to some exemplary embodiments, with reference to Fig.21, the size of the light guide plate 120 along the second direction Y is smaller than the size of the light guide plate 120 along the first direction X. The length of the light-emitting surface 131A of the first light source 131 along the second direction Y and the length of the light-emitting surface 132A of the second light source 132 along the second direction Y are smaller than the length of the light-emitting surface 133A of the third light source 133 along the second direction Y and the length of the light-emitting surface 134A of the fourth light source 134 along the second direction Y. Based on this, the length of the first diagonal line N1 is set to be smaller than the length of the second diagonal line N2, which can further improve the brightness and brightness uniformity of the backlight module.

[0274] According to some exemplary embodiments, with reference to Fig.21 , Fig.22A and Fig. 22B , the third dot pattern 430 includes a seventh edge M7 and an eighth edge M8. The orthographic projections of the seventh edge M7 and the eighth edge M8 on the third bottom surface H3 coincide with the second diagonal line N2. The angle between the seventh edge M7 and the third bottom surface H3 is 45°, and the angle between the eighth edge M8 and the third bottom surface H3 is 45°. With such a setting, the brightness and brightness uniformity of the backlight module can be further improved.

[0275] According to some exemplary embodiments, with reference to Fig.21 and Fig.22A , one vertex angle β5 of the third bottom surface H3 can be 120°, that is, the angle of one vertex angle β5 facing the second diagonal line N2 is 120°. The third bottom surface H3 includes a first base H31, a second base H32, a third base H33, and a fourth base H34. The first base H31 is located in the direction close to the first light source 131 and the third light source 133. The second base H32 is located in the direction close to the second light source 132 and the third light source 133. The third base H33 is located in the direction close to the first light source 131 and the fourth light source 134. The fourth base H34 is located in the direction close to the second light source 132 and the fourth light source 134. The angles between the first base H31 and the third base H33 and the light-emitting surface 131A of the first light source 131 are both 60°. The angles between the second base H32 and the fourth base H34 and the light-emitting surface 132A of the second light source 132 are both 60°. The angles between the first base H31 and the second base H32 and the light-emitting surface 133A of the third light source 133 are both 30°. The angles between the third base H33 and the fourth base H34 and the light-emitting surface of the fourth light source are both 30°. With such a setting, the brightness and brightness uniformity of the backlight module can be further improved.

[0276] Fig.23A Schematically shows a cross-sectional view of a display device according to some embodiments of the present disclosure.

[0277] Some embodiments of the present disclosure further provide a display device, which includes a display panel PNL and the backlight module BLU described above. Referring to Fig.23A , the display panel PNL is located on one side of the light-emitting surface of the backlight module BLU. The display panel PNL can be adhered to the backlight module BLU through a first adhesive layer 61. The first adhesive layer 61 is in a mouth shape and is disposed around the display area of the display panel PNL.

[0278] It should be noted that Fig.23A only the structure of the display device on one side of the first frame 210 of the backlight module BLU is schematically shown. At the frames on other sides, the first adhesive layer 61 is adhered and fixed at the frame of the backlight module BLU.

[0279] According to some exemplary embodiments, referring to Fig.23A , the display device further includes a cover plate CG and a support bar 62. The cover plate CG is adhered to the side of the display panel PNL away from the backlight module BLU through an optical adhesive layer OCA. The edge of the optical adhesive layer OCA protrudes from the edge of the display panel PNL, and the edge of the cover plate CG protrudes from the edge of the optical adhesive layer OCA. One side of the first adhesive layer 61 extends to the side of the first top plate 212 away from the backplane 110 and is adhered to the first top plate 212, and the other side of the first adhesive layer 61 extends to the side of the second top plate away from the backplane and is adhered to the second top plate. The support bar 62 is located between the first adhesive layer 61 and the optical adhesive layer OCA. The orthographic projection of the support bar 62 on the backplane 110 overlaps at least partially with the orthographic projection of the first top plate 212 on the backplane 110. By adding the support bar 62, on the one hand, it can support the edge of the cover plate CG, and on the other hand, the support bar 62 can fix the first adhesive layer 61 located on the lower side, increasing the bonding strength between the first adhesive layer 61 and the first top plate 212, and avoiding the problem that the first adhesive layer 61 detaches from the first top plate 212 due to shrinkage of the first adhesive layer 61 or impact on the display device during use, resulting in the separation of the display panel PNL from the backlight module BLU.

[0280] According to some exemplary embodiments, the material of the support bar 62 may include an organic polymer material. For example, the material of the support bar 62 may include polyethylene terephthalate.

[0281] Fig. 23B Schematically shows a cross-sectional view of a display device according to some other embodiments of the present disclosure.

[0282] According to some exemplary embodiments, referring to Fig. 23B, the first border 210 includes a first side plate 211 and a first glue frame 213. One side of the first glue layer 61 extends to the side of the first glue frame 213 away from the back plate 110 and adheres to the first glue frame 213. The orthographic projection of the support bar 62 on the back plate 110 overlaps at least partially with the orthographic projection of the first glue frame 213 on the back plate 110. By adding the support bar 62, on the one hand, it can support the edge of the cover plate CG, and on the other hand, the support bar 62 can fix the first glue layer 61 located on the lower side, increasing the bonding strength between the first glue layer 61 and the first glue frame 213, and avoiding the problem that the first glue layer 61 shrinks or the first glue layer 61 detaches from the first glue frame 213 when the display device is impacted during use, resulting in the separation of the display panel PNL from the backlight module BLU.

[0283] It should be noted that when the backlight module in the display device adopts Figure 4 the backlight module shown in the schematic diagram, the support bar can be arranged above the first border, that is Fig.23A or Fig. 23B the structure shown in the schematic diagram. When the backlight module in the display device adopts Fig.13 the backlight module shown in the schematic diagram, a support bar can be further arranged above the third top plate. When the backlight module in the display device adopts Fig.19 the backlight module shown in the schematic diagram, support bars can be arranged above both the third top plate and the fourth top plate. The support bars located on the third top plate and the fourth top plate can be set with reference to Fig.23A and will not be elaborated here.

[0284] According to some exemplary embodiments, referring to Fig.23A , the display panel PNL includes a first polarizing layer 51, an array substrate 52, a color filter substrate 53, and a second polarizing layer 54. The first polarizing layer 51 is located on the backlight module BLU, the array substrate 52 is located on the side of the first polarizing layer 51 away from the backlight module BLU, the color filter substrate 53 is located on the side of the array substrate 52 away from the backlight module BLU, and the second polarizing layer 54 is located on the side of the color filter substrate 53 away from the back plate 110. The side of the support bar 62 away from the backlight module BLU is closer to the backlight module BLU than the side of the color filter substrate 53 away from the backlight module BLU, and the side of the support bar 62 away from the backlight module BLU is farther from the backlight module BLU than the side of the color filter substrate 53 close to the backlight module BLU. Through research, the inventor sets the support height of the support bar 62 in this way, which can achieve a better support effect on the cover plate CG.

[0285] According to some exemplary embodiments, the display device further includes a packaging tape 63. One end of the packaging tape 63 is attached to the side of the display panel PNL away from the backlight module BLU, and the other end extends to the side of the backplane 110 away from the light guide plate 120 via the side of the support bar 62 away from the backplane 110 and the side of the first side plate 211 away from the light guide plate 120. The packaging tape 63 wraps around the display panel PNL, the support bar 62, and the backlight module BLU, which can further reduce the risk of separation between the display panel PNL and the backlight module BLU.

[0286] According to some exemplary embodiments, referring to Fig.23A , the side of the first polarizing layer 51 close to the support bar 62, the side of the array substrate 52 close to the support bar 62, and the side of the color filter substrate 53 close to the support bar 62 are substantially flush. The side of the second polarizing layer 54 close to the support bar 62 is farther from the support bar 62 than the side of the color filter substrate 53 close to the support bar 62. One end of the packaging tape 63 is adhered to the side of the color filter substrate 53 away from the array substrate 52. The thickness of the packaging tape 63 can be similar to or less than the thickness of the second polarizing layer 54, so as not to affect the bonding strength between the upper optical adhesive layer OCA and the display panel PNL.

[0287] It should be noted that the packaging tape can be provided at the side with the support bar, or the packaging tape can also be provided at other sides of the display device to further reduce the risk of the display panel falling off the backlight module.

[0288] Fig.24 The plan view of the display device according to some embodiments of the present disclosure is schematically shown.

[0289] Referring to Fig.24 , in this display device, the display panel PNL includes a display area AA and a peripheral area NA located in the peripheral area of the display area AA. The display panel PNL includes a driving chip IC located in the peripheral area NA, and the driving chip IC is located on one side of the display area AA along the second direction Y. The backlight module BLU can adopt Figure 4 the schematically shown backlight module BLU. The first light source 131 and the second light source 132 in the backlight module BLU are located on both sides along the first direction X, and the setting areas of the first light source 131 and the second light source 132 in the backlight module BLU do not overlap with the setting area of the driving chip IC.

[0290] The inventors have found through research that by setting the light source 130 in the backlight module BLU and the driving chip IC in the display panel PNL on different sides, while increasing the brightness of the backlight module BLU, the temperature rise of the backlight module BLU during operation can also be reduced. The verification process and verification results are shown in the following description.

[0291] The display device one and the display device two are prepared by the following steps:

[0292] Provide a display panel. Refer to Fig.24 , the ratio of the size of the display area AA of the display panel along the first direction X to the size along the second direction Y is 3:2.

[0293] Provide a backlight module one and a backlight module two. The structure of the backlight module one refers to the backlight module schematically shown in Figure 1 . The light source 130 of the backlight module one is arranged on one side along the second direction Y. The structure of the backlight module two refers to Figure 4 and Fig.24 . The backlight module includes a first light source 131 and a second light source 132. The first light source 131 and the second light source 132 are located on both sides of the first direction X. The other structures and models of the backlight module one and the backlight module two are the same, and the only difference lies in the number and setting positions of the light sources 130. And the light sources in the backlight module one and the light sources in the backlight module two are both composed of light-emitting diodes (LEDs) of the same model.

[0294] Assemble the backlight module one and the display panel to obtain the display device one. In the display device one, the driving chip IC of the display panel and the light source 130 of the backlight module one are located on the same side along the second direction Y (the structure schematically shown in Figure 1 can be referred to), and assemble the backlight module two and the display panel to obtain the display device two.

[0295] Conduct temperature rise tests on the backlight module one and the backlight module two, and conduct temperature rise tests on the display device one and the display device two. The test results are as described in Table 1 and Table 2 below.

[0296] Table 1

[0297]

[0298] According to the data in Table 1, it can be known that compared with the backlight module one with light sources arranged only on one side, the backlight module two has light sources arranged on both sides, the number of LEDs in the light sources increases, and when the LED current remains unchanged, the central brightness of the backlight module two is improved compared with the central brightness of the backlight module one. At the same time, when the LED current is further increased, the central brightness of the backlight module two can be further improved.

[0299] Table 2

[0300]

[0301] According to the data in Table 2, it can be known that, compared with Display Device 1, since the backlight module 2 in Display Device 2 sets the light source and the driving chip on different sides, the heat generated by the driving chip during operation will not cause the temperature of the backlight module to rise. Therefore, at the same brightness, the temperature rise of the backlight module 2 in Display Device 2 is significantly reduced. At the same time, even if the brightness of the backlight module 2 is further increased, the temperature rise of the backlight module 2 is still less than that of the backlight module 1.

[0302] Fig.25 Schematically shows a plan view of a display device according to some embodiments of the present disclosure.

[0303] Referring to Fig.25 , in this display device, the display panel includes a display area AA and a peripheral area NA located around the display area AA. The display panel includes a driving chip IC located in the peripheral area NA, and the driving chip IC is located on one side of the display area AA along the second direction Y. The backlight module can adopt Fig.13 the schematic backlight module. The first light source 131 and the second light source 132 in the backlight module are located on both sides along the first direction X, and the third light source 133 and the driving chip IC are located on both sides along the second direction Y respectively. The setting areas of the first light source 131, the second light source 132, and the third light source 133 in the backlight module do not overlap with the setting area of the driving chip IC.

[0304] The inventors have found through research that setting the light source in the backlight module and the driving chip in the display panel on different sides can not only increase the brightness of the backlight module but also reduce the temperature rise of the backlight module during operation. The verification process and verification results are described later.

[0305] The following steps are used to prepare Display Device 1 and Display Device 3:

[0306] Provide a display panel. Referring to Fig.25 , the ratio of the size of the display area AA of the display panel along the first direction X to the size along the second direction Y is 3:2.

[0307] Provide backlight module 1 and backlight module 3. The structure of backlight module 1 refers to the backlight module schematically shown in Figure 1 . The light source 130 of backlight module 1 is set on one side along the second direction Y. The structure of backlight module 3 refers to Fig.13 and Fig.25, The backlight module includes a first light source 131, a second light source 132, and a third light source 133. The first light source 131 and the second light source 132 are located on both sides of the first direction X, and the third light source 133 and the driving chip IC are located on both sides of the second direction Y respectively. The other structures and models of the first backlight module and the third backlight module are the same, and the only differences are the number and positions of the light sources 130. Moreover, the light sources 130 in the first backlight module and the third backlight module are both composed of light-emitting diodes (LEDs) of the same model.

[0308] The first backlight module and the display panel are assembled to obtain a first display device. In the first display device, the driving chip IC of the display panel and the light source 130 of the first backlight module are located on the same side along the second direction Y (the structure shown in Figure 1 can be referred to), and the third backlight module and the display panel are assembled to obtain a third display device.

[0309] The first display device and the third display device are tested for brightness and temperature rise, and the test results are as described in Table 3 and Table 4 below.

[0310] Table 3

[0311]

[0312] According to the data in Table 3, it can be known that compared with the first backlight module with light sources only on one side, the third backlight module has light sources on three sides, and the number of LEDs in the light sources increases. When the LED current remains unchanged, the central brightness of the third backlight module is improved compared with that of the first backlight module. At the same time, when the LED current is further increased, the central brightness of the third backlight module can be further improved.

[0313] Table 4

[0314]

[0315] According to the data in Table 4, it can be known that compared with the first display device, since the third backlight module in the third display device sets the light source and the driving chip on different sides, the heat generated by the driving chip during operation will not cause the temperature of the backlight module to rise. Therefore, at the same brightness, the temperature rise of the third backlight module in the third display device is significantly reduced. At the same time, if the brightness of the third backlight module is further increased, the temperature rise of the third backlight module may still be less than that of the first backlight module (specifically depending on the size relationship between K and O. For different backlight modules and different driving chips, the values of K and O are different).

[0316] As used herein, the terms "substantially", "about", "approximately" and other similar terms are used as terms of approximation and not as terms of degree, and they are intended to account for the inherent deviations of measured or calculated values that would be recognized by a person of ordinary skill in the art. Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), "about" or "approximately" as used herein includes the stated value and represents that the particular value as determined by a person of ordinary skill in the art is within an acceptable deviation range. For example, "about" can mean within one or more standard deviations, or within ±10% or ±5% of the stated value.

[0317] Although some embodiments in accordance with the general inventive concept of the present disclosure have been illustrated and described, those of ordinary skill in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A backlight module, characterized in that: The backlight module comprises: Back panel; a light guide plate, located on the back plate, the light guide plate comprising a first light incident surface, a second light incident surface and a light exit surface, the second light incident surface and the first light incident surface are respectively located on two sides of the light guide plate along a first direction, and the light exit surface comprises a side surface of the light guide plate away from the back plate; A light source, comprising a first light source and a second light source, wherein the first light source and the second light source are respectively located on both sides of the light guide plate along a first direction, a light emitting surface of the first light source is arranged facing the first light incident surface, and a light emitting surface of the second light source is arranged facing the second light incident surface; a first frame extending along the second direction and located at a side of the first light source away from the light guide plate, the first frame being connected to a side of the back plate away from the first light source, and the second direction intersecting the first direction; and A second frame extending along the second direction and located at a side of the second light source away from the light guide plate, the second frame being connected to a side of the back plate away from the second light source; The orthographic projection of the first frame on the back panel is spaced from the orthographic projection of the first light source on the back panel, and the orthographic projection of the second frame on the back panel covers at least a portion of the orthographic projection of the second light source on the back panel.

2. The backlight module according to claim 1, wherein: The backlight module further includes a first circuit board and a second circuit board, the first circuit board includes a first main body and a first connecting portion, the first main body is electrically connected to the first light source, one end of the first connecting portion is electrically connected to the first main body and the other end extends through a first hollow structure in the first frame; The second circuit board includes a second main body and a second connecting portion, the second main body is electrically connected to the second light source, one end of the second connecting portion is electrically connected to the second main body and the other end extends through a second hollow structure in the second frame; as well as The orthographic projection of the first frame on the back panel is spaced apart from the orthographic projection of the first main body on the back panel, and the orthographic projection of the second frame on the back panel at least partially overlaps with the orthographic projection of the second main body on the back panel.

3. The backlight module according to claim 2, wherein: A size of the first frame along the first direction is smaller than a size of the second frame along the first direction.

4. The backlight module according to claim 3, wherein: The second frame includes a second side panel and a second top panel, the second side panel is connected to the side of the back panel away from the second light source, one side of the second top panel is connected to the side of the second side panel away from the back panel and the other side extends in a direction close to the light guide plate, at least a portion of the second light source is located between the second top panel and the back panel, and / or at least a portion of the second main body is located between the second top panel and the back panel.

5. The backlight module according to claim 4, wherein: The first frame includes a first side panel and a first top panel, the first side panel is connected to the side of the back panel away from the first light source, one side of the first top panel is connected to the side of the first side panel away from the back panel and the other side is extended in the direction close to the light guide plate, the size of the first top panel along the first direction is smaller than the size of the second top panel along the first direction, the orthographic projection of the first top panel on the back panel is spaced from the orthographic projection of the first light source on the back panel, and the orthographic projection of the first top panel on the back panel is spaced from the orthographic projection of the first main body on the back panel.

6. The backlight module according to claim 4, wherein: The first frame includes a first side panel and a first rubber frame, the first side panel is connected to the side of the back panel away from the first light source, the first rubber frame is connected to the side of the first side panel close to the first light source and the side of the first side panel away from the back panel, the distance between the side of the first rubber frame close to the first light source and the side of the first side panel away from the first light source along the first direction is smaller than the distance between the side of the second top panel close to the second light source and the side of the second side panel away from the second light source along the first direction, the first rubber frame and the first light source are spaced apart along the first direction, and the first rubber frame and the first main body are spaced apart along the first direction.

7. The backlight module according to claim 5, wherein: The first hollow structure extends from the first side plate to the first top plate and penetrates the edge of the first top plate close to the light guide plate along the first direction.

8. The backlight module according to claim 6, wherein: The first hollow structure includes a first hollow sub-portion located in the first side panel and a second hollow sub-portion located in the first rubber frame, the first hollow sub-portion extends from a side of the first side panel close to the back panel toward a direction away from the back panel and passes through an edge of the first side panel away from the back panel, the second hollow sub-portion extends from a side of the first rubber frame close to the back panel toward a direction away from the back panel and passes through an edge of the first rubber frame away from the back panel, and the first hollow sub-portion is connected to the second hollow sub-portion.

9. The backlight module according to claim 7, wherein: The second hollow structure is located in the second side plate, and a side of the second hollow structure away from the back plate ends at a side of the second top plate close to the back plate.

10. The backlight module according to any one of claims 1 to 9, wherein: At least one corner of the light guide plate is a concave arc corner; At least one of the concave arc corners is adjacent to the first light source, and the orthographic projection of the concave arc corner on the first frame is spaced apart from or tangent to the orthographic projection of the first light source on the first frame; and / or, At least one of the inwardly concave arc corners is adjacent to the second light source, and an orthographic projection of the inwardly concave arc corner on the second frame is spaced apart from or tangent to an orthographic projection of the second light source on the second frame.

11. The backlight module according to claim 10, wherein: The first light source includes a plurality of light emitting devices distributed at intervals along the second direction, and / or the second light source includes a plurality of light emitting devices distributed at intervals along the second direction; and The size of the light emitting device along the second direction is a first size, the spacing between adjacent light emitting devices along the second direction is a second size, the size of the concave arc corner along the second direction is a third size, and the third size is ≤ first size + second size.

12. The backlight module according to claim 5, 7 or 9, wherein: The backlight module also includes a first light source reflecting film located on a side of the first light source away from the back panel, a first colloid located on a side of the first light source reflecting film away from the back panel, and a diffusion film located on a side of the first colloid away from the back panel, and the diffusion film extends from a side of the first colloid away from the back panel to a side of the light guide plate away from the back panel.

13. The backlight module according to claim 12, wherein: The backlight module further comprises a brightness enhancement film located on a side of the diffusion film away from the back plate, and the side of the brightness enhancement film away from the back plate is substantially flush with the side of the first top plate away from the back plate.

14. The backlight module according to claim 13, wherein: The brightness enhancement film comprises a first brightness enhancement film located on a side of the diffusion film away from the back plate, and a second brightness enhancement film located on a side of the first brightness enhancement film away from the back plate, the side of the first brightness enhancement film close to the first frame is substantially flush with the side of the diffusion film close to the first frame, and the side of the second brightness enhancement film close to the first frame is further away from the first frame than the side of the first light source reflection film close to the first frame; The first brightness enhancement film includes a first portion located on the first light source reflecting film away from the back plate, the side of the first portion away from the back plate is substantially flush with the side of the first top plate away from the back plate, and the side of the first portion away from the back plate is substantially flush with the side of the second brightness enhancement film away from the back plate.

15. The backlight module according to any one of claims 1-9, 11, 13-14, wherein: The backlight module further includes a third frame and a fourth frame respectively located on both sides of the light guide plate along the second direction, a third plastic frame is arranged on the third frame, and / or a fourth plastic frame is arranged on the fourth frame.

16. The backlight module according to claim 15, wherein: A plurality of first mesh dots distributed in an array are arranged on a side of the light guide plate close to the back plate, the plurality of first mesh dots include a first mesh dot portion and a second mesh dot portion arranged along the first direction, the first mesh dot portion is located on a side close to the first light source, and the second mesh dot portion is located on a side close to the second light source; In the first halftone dot portion, along the direction from the first light source to the second light source, the distribution density of the first halftone dots gradually increases; In the second halftone dot portion, along a direction from the first light source to the second light source, a distribution density of the first halftone dots gradually decreases.

17. The backlight module according to claim 16, wherein: The plurality of dots include a plurality of columns of first dots arranged along the first direction; In the first halftone dot portion, the spacing between two adjacent columns of first halftone dots along the direction from the first light source to the second light source gradually decreases, and among the first halftone dots in four adjacent columns, the spacing between a column of first halftone dots closest to the first light source and an adjacent column of first halftone dots along the first direction is a first spacing, the spacing between two columns of first halftone dots in the middle along the first direction is a second spacing, and the spacing between a column of first halftone dots farthest from the first light source and an adjacent column of first halftone dots along the first direction is a third spacing, and the difference between the first spacing and the second spacing is greater than the difference between the second spacing and the third spacing; and / or In the second dot portion, along the direction from the first light source to the second light source, the spacing between two adjacent columns of first dots along the first direction gradually decreases, and among the first dots in four adjacent columns, the spacing between a column of first dots closest to the second light source and an adjacent column of first dots along the first direction is a fourth spacing, the spacing between two columns of first dots in the middle along the first direction is a fifth spacing, the spacing between a column of first dots farthest from the second light source and an adjacent column of first dots along the first direction is a sixth spacing, and the difference between the fourth spacing and the fifth spacing is greater than the difference between the fifth spacing and the sixth spacing.

18. The backlight module according to claim 16 or 17, wherein: The shape of the first mesh point includes a triangular pyramid, the first mesh point includes a first bottom surface, a first edge, a second edge and a third edge, the first bottom surface is an isosceles triangle, the first edge is connected to the intersection of two waists of the first bottom surface, and the first edge is perpendicular to the first bottom surface, and the second edge, the third edge and the bottom edge of the first bottom surface enclose a first side surface; The first mesh point is recessed from the side of the light guide plate close to the back plate toward a direction away from the back plate, and the first bottom surface is substantially flush with the side of the light guide plate close to the back plate; as well as In the first halftone dot portion, a first side surface of the first halftone dot faces a light emitting surface of the first light source, and in the second halftone dot portion, a first side surface of the first halftone dot faces a light emitting surface of the second light source.

19. The backlight module according to claim 18, wherein: In the first halftone dot portion, a first side surface of the first halftone dot faces a light emitting surface of the first light source and the third frame, and an angle between a side edge connecting the first side surface and the first bottom surface and the light emitting surface of the first light source is a first angle; and In the second halftone dot portion, the first side surface of the first halftone dot faces the light emitting surface of the second light source and the fourth frame, and the angle between the side edge connecting the first side surface and the first bottom surface and the light emitting surface of the second light source is a second angle; The first angle is substantially equal to the second angle, and the first angle is acute to the second angle.

20. The backlight module according to claim 18, wherein: The top angle of the first bottom surface is an obtuse angle; and / or The included angle between the first bottom surface and the first side surface is 45°.

21. The backlight module according to any one of claims 4 to 9, wherein: The light guide plate further comprises a third light incident surface, and the third light incident surface is located at one side of the light guide plate in the second direction; The backlight module further includes a third light source and a third frame, the third light source is located on one side of the light guide plate along the second direction, the light emitting surface of the third light source is arranged facing the third light incident surface, the third frame is located on the side of the third light source away from the light guide plate, the third frame includes a third side plate and a third top plate, the third side plate is connected to the side of the back plate away from the third light source, one side of the third top plate is connected to the side of the third side plate away from the back plate and the other side is extended in a direction close to the light guide plate; and The dimension of the third top plate along the second direction is smaller than the dimension of the second top plate along the first direction, and the orthographic projection of the third top plate on the back plate is spaced apart from the orthographic projection of the third light source on the back plate.

22. The backlight module according to claim 21, wherein: The backlight module further includes a fourth frame, and the fourth frame is located on a side of the light guide plate away from the third frame; The fourth frame includes a fourth side plate and a fourth top plate, the fourth side plate is connected to the side of the back plate away from the third frame, one side of the fourth top plate is connected to the side of the fourth side plate away from the back plate and the other side is extended in a direction close to the light guide plate; and The size of the fourth top plate along the second direction is smaller than the size of the second top plate along the first direction, and the orthographic projection of the fourth top plate on the back plate is spaced apart from the orthographic projection of the light guide plate on the back plate.

23. The backlight module according to claim 21, wherein: A plurality of second grid points distributed in an array are arranged on the side surface of the light guide plate close to the back plate, and the distribution density of the second grid points gradually increases in a direction away from the third light source.

24. The backlight module according to claim 23, wherein: The plurality of second mesh dots include a plurality of rows of second mesh dots arranged along the second direction, and the distance between two adjacent rows of second mesh dots gradually decreases along the direction away from the third light source; Among the four adjacent rows of second dots, the spacing between the row of first dots closest to the third light source and the adjacent row of first dots is the seventh spacing, the spacing between the two middle rows of first dots is the eighth spacing, the spacing between the row of first dots farthest from the third light source and the adjacent row of first dots is the ninth spacing, and the difference between the seventh spacing and the eighth spacing is smaller than the difference between the eighth spacing and the ninth spacing.

25. The backlight module according to claim 23 or 24, wherein: The shape of the second mesh point includes a triangular pyramid, the second mesh point includes a second bottom surface, a fourth edge, a fifth edge and a sixth edge, the shape of the second bottom surface is an isosceles triangle, the fourth edge is connected to the intersection of two waists of the second bottom surface, and the fourth edge is perpendicular to the second bottom surface, and the fifth edge, the sixth edge and the bottom edge of the second bottom surface enclose a second side surface; The second mesh points are recessed from the side surface of the light guide plate close to the back plate toward a direction away from the back plate, and the second bottom surface is substantially flush with the side surface of the light guide plate close to the back plate; and The second side surface faces the third light source, and a side edge where the second side surface and the second bottom surface are connected is parallel to a light emitting surface of the third light source.

26. The backlight module according to claim 25, wherein: The top angle of the second bottom surface is an acute angle; and / or The dimension of the second bottom surface along the second direction is equal to the length of the fourth edge.

27. The backlight module according to any one of claims 4 to 9, wherein: The light guide plate further includes a third light incident surface and a fourth light incident surface, the third light incident surface and the fourth light incident surface are respectively located on both sides of the light guide plate along the second direction, the backlight module further includes a third light source and a fourth light source, the third light source and the fourth light source are respectively located on both sides of the light guide plate along the second direction, the light emitting surface of the third light source is arranged facing the third light incident surface, and the light emitting surface of the fourth light source is arranged facing the fourth light incident surface; The backlight module further includes a third frame and a fourth frame, the third frame is located on a side of the third light source away from the light guide plate, the third frame includes a third side plate and a third top plate, the third side plate is connected to a side of the back plate away from the third light source, one side of the third top plate is connected to a side of the third side plate away from the back plate and the other side is extended toward the light guide plate, the fourth frame is located on a side of the fourth light source away from the light guide plate, the fourth frame includes a fourth side plate and a fourth top plate, the fourth side plate is connected to a side of the back plate away from the fourth light source, one side of the fourth top plate is connected to a side of the fourth side plate away from the back plate and the other side is extended toward the light guide plate; and The size of the third top plate along the second direction is smaller than the size of the second top plate along the first direction, and the orthographic projection of the third top plate on the back plate is spaced apart from the orthographic projection of the third light source on the back plate. The size of the fourth top plate along the second direction is smaller than the size of the second top plate along the first direction, and the orthographic projection of the fourth top plate on the back plate is spaced apart from the orthographic projection of the fourth light source on the back plate.

28. The backlight module according to claim 27, wherein: A plurality of third grid points distributed in an array are arranged on the side of the light guide plate close to the back plate, and the plurality of third grid points are evenly distributed.

29. The backlight module according to claim 28, wherein: The shape of the third network point includes a quadrangular pyramid, the third network point includes a third bottom surface, the third bottom surface is a rhombus, and the orthographic projection of the vertex of the third network point away from the third bottom surface on the third bottom surface coincides with the geometric center of the third bottom surface; The third grid point is recessed from the side of the light guide plate close to the back plate toward a direction away from the back plate, and the third bottom surface is substantially flush with the side of the light guide plate close to the back plate; and The third bottom surface includes a first diagonal line and a second diagonal line, the first diagonal line is parallel to the light emitting surface of the first light source and the light emitting surface of the second light source, and the second diagonal line is parallel to the light emitting surface of the third light source and the light emitting surface of the fourth light source.

30. The backlight module according to claim 29, wherein: A size of the light guide plate along the second direction is smaller than a size of the light guide plate along the first direction, and a length of the first diagonal line is smaller than a length of the second diagonal line.

31. The backlight module according to claim 30, wherein: The third grid point includes a seventh edge and an eighth edge, the orthographic projections of the seventh edge and the eighth edge on the third bottom surface coincide with the second diagonal line, the angle between the seventh edge and the third bottom surface is 45°, and the angle between the eighth edge and the third bottom surface is 45°.

32. A display device, characterized in that: The display device comprises a display panel and a backlight module according to any one of claims 1 to 31, wherein the display panel is located on one side of a light emitting surface of the backlight module.

33. The display device according to claim 32, wherein: The display device further includes: A cover plate, located at a side of the display panel away from the backlight module, wherein an edge of the cover plate protrudes from an edge of the display panel; a first adhesive layer, located between the backlight module and the display panel, wherein one side of the first adhesive layer extends to a side of the first frame and / or the second frame away from the back plate; and A support strip is located between the first adhesive layer and the cover plate, and an orthographic projection of the support strip on the back plate at least partially overlaps with an orthographic projection of the first frame on the back plate.

34. The display device according to claim 33, wherein: The display panel comprises: A first polarizing layer is located on the backlight module; An array substrate, located on a side of the first polarizing layer away from the backlight module; A color filter substrate, located at a side of the array substrate away from the backlight module; and A second polarizing layer is located on a side of the color filter substrate away from the backplane; Wherein, the side of the support bar away from the backlight module is closer to the backlight module than the side of the color film substrate away from the backlight module.

35. The display device according to claim 33 or 34, wherein: The display device also includes a packaging tape, one end of which is attached to the side of the display panel away from the backlight module, and the other end of which extends to the side of the back panel away from the light guide plate via the side of the support bar away from the back panel and the side of the first frame away from the light guide plate.

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