Light source assembly, backlight module, display module, and display apparatus

Abstract

Disclosed in the present disclosure are a light source assembly, a backlight module, a display module, and a display apparatus. The light source assembly comprises: a first driver board and a light-emitting assembly which is arranged on one side surface of the driver board, is electrically connected to the driver board and extends in a first direction. The first driver board comprises a first base layer, a conductive layer connected to the light-emitting assembly, and a signal lead-out portion electrically connected to the conductive layer, wherein the signal lead-out portion extends in a second direction perpendicular to the first direction. The light-emitting assembly comprises a plurality of light-emitting devices arranged in the first direction. The light source assembly further comprises a first adhesive layer; the first adhesive layer comprises a first edge portion and a second edge portion that extend in the first direction; and the first edge portion is farther from the signal lead-out portion than the second edge portion. The first adhesive layer is provided with a first opening at the position of each light-emitting device; the first opening has a first boundary and a second boundary that extend in the first direction; the first boundary is farther from the signal lead-out portion than the second boundary; and the second boundary comprises a protruding portion in a direction away from the first boundary.

Description

Light source components, backlight modules, display modules and display devices

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202411547977.5, filed with the State Intellectual Property Office of the People's Republic of China on October 31, 2024, entitled "A Light Source Assembly, Backlight Module, Display Module and Display Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display technology, and in particular to light source components, backlight modules, display modules, and display devices. Background Technology

[0004] OLED (Organic Light Emitting Diode) display modules with related technologies have achieved brightness levels of over 1000 nits, with peak instantaneous brightness reaching as high as 2000 nits. LCD (Liquid Crystal Display) modules need to continuously improve their product brightness specifications to narrow the brightness gap with OLED display products. Summary of the Invention

[0005] This disclosure provides a light source assembly, a backlight module, a display module, and a display device to address at least one of the problems existing in the prior art.

[0006] This disclosure provides a light source assembly, comprising: a first driving board and a light-emitting component extending along a first direction and electrically connected to one side surface of the first driving board. The first driving board includes: a first base layer having a first surface and a second surface; a conductive layer disposed on one side of the second surface and connected to the light-emitting component; and a signal lead-out portion electrically connected to the conductive layer, the signal lead-out portion extending in a second direction perpendicular to the first direction. The light-emitting component is disposed on one side of the first surface and includes a plurality of light-emitting devices arranged along the first direction. The light source assembly further includes a first adhesive layer disposed on one side of the first surface, the first adhesive layer including a first side portion and a second side portion extending along the first direction, the first side portion being farther away from the signal lead-out portion than the second side portion. The first adhesive layer has a first opening at the position of each light-emitting device, the orthographic projection of the first opening on the first surface covering the orthographic projection of the light-emitting device on the first surface, the first opening including a first boundary and a second boundary extending along the first direction, the first boundary being farther away from the signal lead-out portion than the second boundary, and the second boundary including a protrusion portion away from the direction of the first boundary.

[0007] In an optional embodiment, the closer to the edge of the light-emitting device along the first direction, the smaller the distance between the boundary of the light-emitting device and the second boundary, and there is a gap between the second boundary and the second side.

[0008] In an optional embodiment, the two ends of the protrusion of the second boundary form a first break, the length of the first break in the first direction is less than or equal to the length of the light-emitting device in the first direction; the first opening also includes a third boundary and a fourth boundary perpendicular to the first boundary and disposed opposite to each other, the distance between the third boundary and the fourth boundary is greater than the length of the light-emitting device in the first direction, and the length of the third boundary or the fourth boundary in the second direction is greater than the length of the light-emitting device in the second direction.

[0009] In an optional embodiment, the first adhesive layer has a second opening at the position of each light-emitting device on the second side, the second opening including a protrusion near the first side; the distance between the center line of the second opening parallel to the second direction and the center line of the light-emitting device parallel to the second direction is less than or equal to 1 / 10 of the length of the light-emitting device in the first direction.

[0010] In an optional embodiment, the two ends of the protruding portion of the second boundary form a first break, the length of the first break in the first direction being less than or equal to the length of the light-emitting device in the first direction; the two ends of the protruding portion of the second opening corresponding to the second edge position form a second break, the length of the second break in the first direction being less than or equal to the length of the first break in the first direction.

[0011] In an optional embodiment, the second opening extends to the first opening and the second opening is connected to the first opening; the connection between the second opening and the first opening forms a first opening boundary and a second opening boundary, respectively, and the distance between the first opening boundary and the second opening boundary in the first direction is less than the length of the first break in the first direction.

[0012] In an optional embodiment, the light-emitting device includes a first light-emitting device surface attached to a first surface, a second light-emitting device surface opposite to the first light-emitting device surface, a light-emitting device surface perpendicular to the first light-emitting device surface, and a non-light-emitting device surface opposite to the light-emitting device surface; a light-emitting focal point is formed between the non-light-emitting device surface and the light-emitting device centerline parallel to the second direction; the angle formed between the first opening boundary and the light-emitting focal point is less than or equal to 45°; the angle formed between the second opening boundary and the light-emitting focal point is less than or equal to 45°.

[0013] In an optional embodiment, the first adhesive layer includes: a first substrate layer including a third surface and a fourth surface disposed opposite to each other, the third surface being closer to the first surface than the fourth surface; a first adhesive layer disposed on the third surface; and a second adhesive layer disposed on the fourth surface;

[0014] At least the third surface of the first substrate layer is white, and at least the fourth surface of the first substrate layer is white;

[0015] The first substrate layer is a white substrate; and / or the first adhesive layer further includes a first anti-reflective layer disposed between the third surface and the first adhesive layer.

[0016] In an optional embodiment, the first substrate layer is a transparent substrate, and the first substrate layer includes: a first screen printing layer located between the first adhesive layer and the third surface; and a second screen printing layer located between the second adhesive layer and the fourth surface, wherein the material of the first screen printing layer and the second screen printing layer is screen printing white oil.

[0017] In an optional embodiment, the first adhesive layer further includes a second anti-reflective layer disposed between the first screen printing layer and the first adhesive layer.

[0018] In an optional embodiment, the first adhesive layer includes: a first substrate layer including a third surface and a fourth surface disposed opposite to each other, the third surface being closer to the first surface than the fourth surface; a first adhesive layer disposed on the third surface; and a second adhesive layer disposed on the fourth surface;

[0019] The first substrate layer comprises multiple substrate sublayers stacked together; the refractive indices of any two adjacent substrate sublayers are different.

[0020] The second adhesive layer includes an adhesive substrate and thermally conductive microparticles.

[0021] In an optional embodiment, the material of the thermally conductive particles is aluminum nitride;

[0022] The mass percentage of thermally conductive particles is greater than or equal to 30% and less than or equal to 60%, and the particle size of the thermally conductive particles is greater than or equal to 0.1 micrometers and less than or equal to 13 micrometers.

[0023] In an optional embodiment, the first drive board further includes a coating layer located between the first surface and the lamp assembly near the first surface, and between the first surface and the first adhesive layer near the first surface. The coating layer covers the first substrate layer by its orthogonal projection, and / or the coating layer is light blue in color and has a wavelength range of 475–520 nm, or the coating layer is white in color.

[0024] In an optional embodiment, the light source assembly further includes: a phosphor layer located on the light-emitting surface of the light-emitting device;

[0025] At least some of the light-emitting devices have fluorescent layers that include red phosphor or green phosphor; and / or at least some of the light-emitting devices have fluorescent layers that include yellow phosphor.

[0026] The red phosphor constitutes a mass percentage of 14% or more and less than or equal to 20% in the fluorescent layer;

[0027] The mass percentage of green phosphor in the fluorescent layer is greater than or equal to 17% and less than or equal to 25%;

[0028] The mass percentage of yellow phosphor in the fluorescent layer is greater than or equal to 18% and less than or equal to 20%.

[0029] This disclosure provides a backlight module, which includes: a back plate with a groove, the back plate including a bottom wall and a side wall; a reflective sheet disposed on the bottom wall; a light guide plate disposed on the reflective sheet; a scattering film disposed on the light guide plate; and a light source assembly provided in this disclosure. A first adhesive layer on the side of the light source assembly away from the signal lead-out portion is fixed to the surface of the light guide plate away from the reflective sheet, and a first adhesive layer on the side of the light source assembly near the signal lead-out portion is fixed to the side wall of the back plate. The light-emitting surface of the light-emitting device is bonded to the side wall surface of the light guide plate perpendicular to the side wall.

[0030] In an optional embodiment, the light guide plate includes a fifth surface near the back plate and a sixth surface away from the back plate.

[0031] The light guide plate is divided into: a first area corresponding to the display area and a second area located between the first area and the light-emitting component;

[0032] The fifth surface has a dotted structure in the first area; the dotted structure includes multiple dots.

[0033] In at least a portion of the dot structure, the dot closer to the light-emitting component has a smaller projected area on the bottom wall; and / or, in at least a portion of the dot structure, the dot depth is smaller in the area closer to the light-emitting component.

[0034] In an optional embodiment, the dot structure includes a first dot area, a second dot area, and a third dot area arranged from the light guide plate direction of the light source assembly. The diameter and depth of the first dot in the first dot area are smaller than the diameter and depth of the second dot in the second dot area, and the diameter and depth of the second dot in the second dot area are smaller than the diameter and depth of the third dot in the third dot area.

[0035] In an optional embodiment, in the second direction, the length of the light guide plate is L; the distance from the dots to the edge of the light guide plate near the light-emitting component is x, and the diameter d(x) of at least some of the dots satisfies:

[0036] When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x;

[0037] When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L);

[0038] When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L).

[0039] In an optional embodiment, in the second direction, the length of the light guide plate is L; the distance from the dots to the edge of the light guide plate near the light-emitting component is x, and the depth H(x) of at least some of the dots satisfies:

[0040] When 0<x≤1 / 3L, d(x)=1.0+4.2x / L;

[0041] When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L;

[0042] When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L.

[0043] In an optional embodiment, a scattering structure is provided on the sixth surface and in the first region. The scattering structure is a plurality of toothed protrusions extending from the fifth surface to the sixth surface. The plurality of toothed protrusions are arranged in an array along a first direction, and each toothed protrusion extends along a second direction.

[0044] A first compensation dot is provided on the side of the scattering structure away from the fifth surface. The first compensation dot is distributed in the display area where the brightness of the light guide plate is less than the preset brightness.

[0045] In an optional embodiment, a second compensation dot is provided in the area of ​​the fifth surface corresponding to the non-display area. The second compensation dot is located at the interval position of adjacent light-emitting devices. The maximum length of the second compensation dot in the first direction is greater than the interval length of the adjacent light-emitting devices in the first direction. The orthographic projection of the second compensation dot on the fifth surface is a raised structure extending from the boundary of the light guide plate near the light-emitting device to the side away from the light-emitting device.

[0046] In one optional embodiment, the light guide plate is divided into a first region and a second region;

[0047] The light guide plate includes: a first sub-part and a second sub-part located in a second region on the side of the first sub-part facing away from the bottom wall;

[0048] The surface of the second sub-part facing away from the bottom wall is an inclined surface, and the angle between the inclined surface and the plane parallel to the bottom wall is greater than 0 and less than or equal to 5°.

[0049] In an optional embodiment, in the second direction, the distance from the light-emitting component to the boundary between the first and second regions is greater than or equal to 1.75 mm;

[0050] The thickness of the first sub-section is greater than or equal to 0.34 mm.

[0051] In an optional embodiment, the backlight module further includes:

[0052] The frame is located at least between the sidewall and the light guide plate;

[0053] The first reflective layer is located on the side of the light guide plate facing the frame.

[0054] In an optional embodiment, the light guide plate includes: a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other and connected to the first side and the second side;

[0055] The first side is positioned opposite to the light-emitting component;

[0056] The first reflective layer is located at least on the second side facing the frame.

[0057] In an optional embodiment, the first reflective layer is also located on the third side facing the frame and the fourth side facing the frame.

[0058] In an optional embodiment, the light guide plate includes a first region; the first region is divided into a first sub-region and a second sub-region outside the first sub-region, the edge of the second sub-region being the edge of the light guide plate; the orthographic projection of the second sub-region onto the bottom wall is adjacent to the orthographic projection of the first reflective layer onto the bottom wall;

[0059] The diameter d(x) of the grid points in the first sub-region satisfies:

[0060] When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x;

[0061] When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L);

[0062] When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L)

[0063] And / or at least some of the network points have a depth H(x) that satisfies:

[0064] When 0<x≤1 / 3L, d(x)=1.0+4.2x / L;

[0065] When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L;

[0066] When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L;

[0067] The dots in the second sub-region with the same x value have different diameters and / or depths than the dots in the first sub-region.

[0068] In an optional embodiment, the first reflective layer covers the side of the light guide plate, and the width of the first reflective layer in the direction perpendicular to the bottom wall is equal to the width of the side of the light guide plate in the direction perpendicular to the bottom wall.

[0069] In an optional embodiment, the thickness of the light guide plate is greater than or equal to 0.3 mm and less than or equal to 1 mm.

[0070] In an optional embodiment, in the arrangement direction of the first reflective layer and the light guide plate, the width of the first reflective layer is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0071] The distance between the first reflective layer and the frame is greater than 0.

[0072] In an optional embodiment, the backlight module further includes a first light-shielding layer; the first light-shielding layer is located on the side of the frame away from the bottom wall, and the orthographic projection of the first reflective layer on the bottom wall falls within the orthographic projection of the first light-shielding layer on the bottom wall.

[0073] The distance between the orthographic projection of the edge of the first reflective layer on the side facing the light guide plate onto the bottom wall and the orthographic projection of the edge of the first light-shielding layer on the side facing the center of the light guide plate onto the bottom wall is greater than or equal to 0.1 mm.

[0074] In an optional embodiment, the backlight module includes a multilayer scattering film; the multilayer scattering film includes:

[0075] The diffuser includes a first prism layer, a second substrate layer, and a diffuser layer stacked on the side of the light guide plate away from the bottom wall; the first prism layer includes a plurality of first prisms that protrude toward the side of the light guide plate and are arranged along a second direction;

[0076] The first prism sheet is located on the side of the diffuser sheet away from the light guide plate; the first prism sheet includes a plurality of second prisms that protrude from the side away from the bottom wall and are arranged along the second direction;

[0077] The second prism sheet is located on the side of the first prism sheet facing away from the light guide plate. The second prism sheet includes a plurality of third prisms that are raised on the side facing away from the light guide plate and arranged along the second direction. The extension direction of the second prism intersects the extension direction of the third prism. The angle b1 between the extension direction of the third prism and the extension direction of the first prism satisfies: a1-20°≤b1≤a1+20°. Wherein, a1 is 0° or 90°.

[0078] In an optional embodiment, the diffusion layer includes a plurality of first scattering particles and a plurality of second scattering particles; the particle size of the first scattering particles is different from that of the second scattering particles.

[0079] In an optional embodiment, the backlight module further includes:

[0080] The light-shielding support is located in the second region between the first light-shielding layer and the light guide plate;

[0081] The light-shielding support is located on the side of the diffuser away from the light guide plate; or,

[0082] The light-shielding support is located on the side of the diffuser.

[0083] In an optional embodiment, the display module further includes:

[0084] The second light-shielding layer is located in the second region between the diffusion layer and the light guide plate.

[0085] In an optional embodiment, the scattering film includes a body portion, the orthographic projection of the body portion on the bottom wall overlapping the orthographic projection of the light guide plate on the bottom wall;

[0086] The orthographic projection of the first light-shielding layer on the bottom wall does not overlap with the orthographic projection of the body of at least one of the multiple scattering films on the bottom wall.

[0087] In an optional embodiment, the first prism sheet includes a first body portion, and the second prism sheet includes a second body portion.

[0088] The orthographic projections of the first body part and the second body part on the bottom wall fall into the orthographic projection of the light guide plate on the bottom wall;

[0089] The orthographic projection of the first light-shielding layer on the bottom wall does not overlap with the orthographic projections of the first body part and the second body part on the bottom wall.

[0090] In an optional embodiment, at least a portion of the orthographic projection of the first light-shielding layer is located on the side of the orthographic projection of at least one scattering film material facing the sidewall.

[0091] In an optional embodiment, the diffuser includes a third body portion, the orthographic projection of the third body portion onto the bottom wall overlapping the orthographic projection of the light guide plate onto the bottom wall;

[0092] The orthographic projection of the first light-shielding layer on the bottom wall and the orthographic projection of the third body portion on the bottom wall do not overlap; or, the orthographic projection of the first light-shielding layer on the bottom wall and the orthographic projection of a portion of the third body portion facing the light-emitting device on the bottom wall overlap.

[0093] In an optional embodiment, the first prism sheet further includes: first lugs located on both sides of the first body portion in a first direction;

[0094] The first adhesive layer includes a second lug;

[0095] The first lug connects to the second lug on the side of the second lug away from the bottom wall.

[0096] In an optional embodiment, the second prism sheet further includes: a third lug located on both sides of the second body portion in a first direction;

[0097] The first light-shielding layer includes an adhesive portion, which is bonded to the third lug.

[0098] In an optional embodiment, the frame includes a first limiting groove for receiving a lug, the first lug extending into the first limiting groove;

[0099] The projections of the first lug and the third lug onto the bottom wall do not overlap.

[0100] In an optional embodiment, the first lug and the third lug have overlapping orthographic projections onto the bottom wall.

[0101] In an optional embodiment, a plurality of light-emitting devices have a first occupancy length D1 in a first direction, and the thermal power consumption W1 of the backlight module satisfies the condition that W1 / D1 is less than or equal to 14.5; wherein the unit of the first occupancy length D1 is millimeters, and the unit of the thermal power consumption W1 of the backlight module is milliwatts.

[0102] This disclosure provides a display module, which includes: a backlight module; a first polarizer disposed on the side of the backlight module away from the back panel; a display panel disposed on the first polarizer; and a second polarizer disposed on the display panel.

[0103] In an optional embodiment, the backlight module includes a second prism sheet and a first light-shielding layer; the orthographic projection of the first light-shielding layer onto the bottom wall and the orthographic projection of the second body portion of the second prism sheet onto the bottom wall do not overlap.

[0104] The display module also includes:

[0105] The second adhesive layer is located between the second prism sheet and the first polarizer.

[0106] In an optional embodiment, the light guide plate includes a second region, and the backlight module includes: a light-shielding support, a diffuser sheet, and a third adhesive layer; the third adhesive layer is a light-shielding adhesive layer.

[0107] The third adhesive layer is located in the second region between the diffuser and the light guide plate, and the third adhesive layer extends to the side of the first drive plate away from the bottom wall.

[0108] The projection of the light-shielding support on the bottom wall overlaps with the projection of the third adhesive layer on the bottom wall;

[0109] The projection of the first light-shielding layer onto the bottom wall overlaps with the projection of the third adhesive layer onto the bottom wall.

[0110] In an optional embodiment, the orthographic projection of the second adhesive layer on the bottom wall and the orthographic projection of the third adhesive layer on the bottom wall do not overlap.

[0111] In an optional embodiment, the display module further includes:

[0112] At least one heat dissipation layer; the heat dissipation layer is located on the bottom wall away from the display panel, or the heat dissipation layer is located on the side of the light source assembly facing the display panel.

[0113] In an optional embodiment, at least one heat dissipation layer includes:

[0114] The first heat dissipation layer is located on the side of the bottom wall away from the display panel; the orthographic projection of the light-emitting device on the bottom wall falls into the orthographic projection of the first heat dissipation layer on the bottom wall;

[0115] The first heat dissipation layer has a first edge in its orthographic projection onto the bottom wall. The first edge is located on the side where the orthographic projection of the light-emitting device onto the bottom wall faces the orthographic projection of the light guide plate onto the bottom wall.

[0116] In the second direction, the distance between the edge of the orthographic projection of the light-emitting device on the bottom wall and the first edge is the first distance, which is greater than or equal to 8 mm and less than or equal to 15 mm.

[0117] In an optional embodiment, in the first direction, the distance between the edge of the first heat dissipation layer projected onto the bottom wall and the projection of the light-emitting device closest to that edge onto the bottom wall is a second distance, which is greater than 0.

[0118] In an optional embodiment, the thermal conductivity of the first heat dissipation layer is greater than 1500 W / m·°C;

[0119] The first heat dissipation layer is a graphite sheet.

[0120] In an optional embodiment, at least one heat dissipation layer includes:

[0121] The second heat dissipation layer is located on the side of the first drive board away from the bottom wall;

[0122] The display module also includes a first light-shielding layer;

[0123] At least one heat dissipation layer includes:

[0124] The third heat dissipation layer is located on the side of the first light-shielding layer away from the bottom wall; the orthographic projection of the third heat dissipation layer on the bottom wall overlaps with the orthographic projection of the light-emitting device on the bottom wall.

[0125] In an optional embodiment, the display panel includes a binding area;

[0126] The display module also includes:

[0127] The second driver board is bonded to the bonding area on the side of the display panel away from the bottom wall;

[0128] At least one heat dissipation layer includes:

[0129] The fourth heat dissipation layer is located on the side of the second drive board away from the bottom wall.

[0130] In an alternative embodiment, the backplate comprises a metallic material having a thermal conductivity greater than 120 W / m·°C.

[0131] In an optional embodiment, the display panel includes: a display area, a peripheral area surrounding the display area, and a first area, the display area surrounding the first area, the first area including a light-transmitting area;

[0132] The display panel includes:

[0133] An array substrate and a counter substrate arranged opposite each other, and a liquid crystal layer and multiple spacers located between the array substrate and the counter substrate;

[0134] The opposing substrate includes a third light-shielding layer, and the third light-shielding layer includes a second opening region located in the light-transmitting region;

[0135] Multiple septa include at least one first septa located in the light-transmitting area;

[0136] The first spacer covers the second opening area in the orthographic projection of the opposite substrate.

[0137] In an optional embodiment, the display panel includes: a display area, a peripheral area surrounding the display area, and a first area;

[0138] The back panel includes a first opening area; in a direction perpendicular to the bottom wall, the orthographic projection of the first opening area falls within the orthographic projection of the first area; the bottom wall has a first opening in the first opening area, and the side wall includes: a first side wall connected to the bottom wall at the edge of the first opening;

[0139] The light guide plate includes a second opening area surrounding the first sidewall and the first opening area, and the scattering film includes a third opening area surrounding the first sidewall and the first opening area;

[0140] The display module also includes a fourth adhesive layer, located between the scattering film and the first sidewall and the first polarizer. In the direction perpendicular to the bottom wall, the orthographic projection of the fourth adhesive layer surrounds the orthographic projection of the first opening area.

[0141] In the direction perpendicular to the bottom wall, the orthographic projection of the first region covers the orthographic projection of the fourth adhesive layer, the first opening region, the third opening region, and the first sidewall.

[0142] In an optional embodiment, in the direction perpendicular to the bottom wall, the first sidewall has a first thickness, the first sidewall has a first distance from the fourth adhesive layer, the surface of the scattering film furthest from the light guide plate on the side facing away from the bottom wall has a second distance from the bottom wall, and the sum of the first thickness and the first distance is greater than or equal to the second distance.

[0143] This disclosure provides a display device, which includes a display module provided in this disclosure. Attached Figure Description

[0144] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0145] Figure 1 shows a schematic diagram of the layer structure of the light source assembly according to the first embodiment of this disclosure;

[0146] Figure 2 shows a top view of a light source assembly with a first opening according to an embodiment of the present disclosure;

[0147] Figure 3 shows a top view of the structure of a light source assembly with a rectangular opening in the related technology;

[0148] Figure 4 shows a top view of a light source assembly having a first opening and a second opening according to an embodiment of the present disclosure.

[0149] Figure 5 shows a top view of a light source assembly having a first opening and a small second opening according to an embodiment of the present disclosure;

[0150] Figure 6 shows a top view of a light source assembly having a first opening and a large second opening according to an embodiment of the present disclosure.

[0151] Figure 7 shows a schematic diagram of a single layer structure of the first adhesive layer, which is white on both sides, according to an embodiment of the present disclosure.

[0152] Figure 8 shows a schematic diagram of another layer structure of the first adhesive layer, which is white on both sides, according to an embodiment of the present disclosure.

[0153] Figure 9 shows a schematic diagram of the layer structure of a light source assembly according to an embodiment of the present disclosure;

[0154] Figure 10 shows a schematic diagram of the layer structure of the backlight module according to the second embodiment of the present disclosure;

[0155] Figure 11 shows a top view of the dot structure of the light guide plate according to an embodiment of the present disclosure;

[0156] Figure 12 shows a schematic diagram of the layer structure of the dot structure of the light guide plate in Figure 11;

[0157] Figure 13 shows a top view of a light guide plate with a scattering structure according to an embodiment of the present disclosure;

[0158] Figure 14 shows a schematic diagram of the layer structure with scattering structure of the light guide plate in Figure 13;

[0159] Figure 15 shows a schematic diagram of the light source components in the dark and bright areas of the related technology;

[0160] Figure 16 shows a top view of a light guide plate with a second compensation dot according to an embodiment of the present disclosure;

[0161] Figure 17 shows a schematic diagram of the layer structure of a display module according to a third embodiment of the present disclosure;

[0162] Figure 18 shows a schematic diagram of the structure of the first substrate layer according to an embodiment of the present disclosure;

[0163] Figure 19 shows a schematic diagram of the dot structure of a light guide plate according to another embodiment of the present disclosure;

[0164] Figure 20 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0165] Figure 21 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0166] Figure 22 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0167] Figure 23 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0168] Figure 24 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0169] Figure 25 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0170] Figure 26 shows a schematic diagram of the brightness patterns of different extension directions of the first prism according to an embodiment of the present disclosure;

[0171] Figure 27 shows a schematic diagram of the brightness patterns of different extension directions of the first prism according to another embodiment of the present disclosure;

[0172] Figure 28 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0173] Figure 29 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0174] Figure 30 shows a schematic diagram of the structure of a backlight module according to another embodiment of the present disclosure;

[0175] Figure 31 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0176] Figure 32 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0177] Figure 33 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0178] Figure 34 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0179] Figure 35 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0180] Figure 36 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0181] Figure 37 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0182] Figure 38 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0183] Figure 39 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0184] Figure 40 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0185] Figure 41 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0186] Figure 42 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0187] Figure 43 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0188] Figure 44 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0189] Figure 45 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0190] Figure 46 shows a schematic diagram of the structure of a display module according to another embodiment of the present disclosure;

[0191] Figure 47 shows a schematic diagram of the structure of an LED chip according to an embodiment of the present disclosure. Detailed Implementation

[0192] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0193] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0194] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0195] To more clearly illustrate this disclosure, the following description, in conjunction with embodiments and accompanying drawings, provides further insight. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of this disclosure.

[0196] To improve the brightness design of liquid crystal display products, this disclosure provides a light source component, a backlight module, a display module, a display device, and a manufacturing method.

[0197] An embodiment of this disclosure provides a light source assembly 50, as shown in Figures 1 and 2. The light source assembly 50 includes: a first driving plate 51 and a light-emitting component 52 disposed on one side surface of the first driving plate 51 and electrically connected to the first driving plate 51, extending along a first direction.

[0198] As shown in Figure 2, the first direction of this embodiment is the horizontal direction shown in Figure 2, and the second direction is the vertical direction shown in Figure 2. In one example, when the light source component 50 is applied to the backlight module, the backlight module is a side-lit backlight module. In this structure, the second direction is the assembly direction of the light source component 50 to the light guide plate, and the first direction is the extension direction of the light source component 50.

[0199] As shown in Figures 1 and 2, the first driving board 51 of this embodiment includes:

[0200] A first base layer 511 having a first surface 511A and a second surface 511B;

[0201] A conductive layer 512 connected to the light-emitting component 52 is disposed on one side of the second surface 511B; and

[0202] The signal lead-out portion 513 is electrically connected to the conductive layer 512 and extends in a second direction perpendicular to the first direction.

[0203] For example, the first driving board 51 in this embodiment is a flexible circuit first driving board 51, which has good folding performance. After the light source assembly 50 is applied to the backlight module, the signal lead-out portion 513 can be folded to the non-light-emitting side of the backlight module, thereby saving the module volume of the backlight module.

[0204] As shown in FIG2, the light-emitting component 52 of this embodiment is disposed on one side of the first surface 511A and includes a plurality of light-emitting devices 521 arranged along a first direction. As shown in FIG1, the light-emitting device 521 of this embodiment includes a first light-emitting device surface 5211 close to and parallel to the first surface 511A, a second light-emitting device surface 5212 opposite to the first light-emitting device surface 5211, a light-emitting device light-emitting surface 5213 perpendicular to the first light-emitting device surface 5211, and a light-emitting device non-light-emitting surface 5214 opposite to the light-emitting surface 5213. The light-emitting device of this embodiment is a side-emitting type, that is, light is emitted from the non-light-emitting surface 5214 to the light-emitting surface 5213 shown in FIG1, or in other words, light is emitted along the second direction shown in FIG2.

[0205] As shown in Figures 1 and 2, the light source assembly 50 of this embodiment further includes a first adhesive layer 53 disposed on one side of the first surface 511A.

[0206] The first adhesive layer 53 includes a first side portion 531 and a second side portion 532 extending along a first direction, wherein the first side portion 531 is farther away from the signal lead-out portion 513 than the second side portion 532.

[0207] The first adhesive layer 53 has a first opening 533 at the position of each of the light-emitting devices 521, and the orthographic projection of the first opening 533 on the first surface 511A covers the orthographic projection of the light-emitting device 521 on the first surface 511A.

[0208] The first opening 533 includes:

[0209] A first boundary 5331 and a second boundary 5332 extending along a first direction, wherein the first boundary 5331 is farther away from the signal lead-out portion 513 than the second boundary 5332, and the second boundary 5332 includes a protruding portion in a direction away from the first boundary 5331.

[0210] In this embodiment, the first adhesive layer 53 of the light source assembly 50 is designed to correspond to the first opening 533 at the position of the light-emitting device 521. Based on the first opening 533 exposing the light-emitting device 521, the shape of the first opening 533 is designed as a protruding structure extending from the first boundary 5331 to the second boundary 5332. For example, in this embodiment, the extension direction of the protruding structure of the first opening 533 is the same as the light emission direction of the light-emitting device 521. The light emission direction of the first opening 533 is as shown in FIG2. The extension of the second boundary 5332 is a protruding structure extending from the first boundary 5331 to the second boundary 5332, which increases the opening area of ​​the surface of the side-entry light-emitting light source perpendicular to the light emission surface, thereby improving the luminous brightness of the light source assembly 50.

[0211] In one specific embodiment, Figure 3 shows the structure of the first opening 533 of the light-emitting component 52 in the related technology. The first opening 533 is a rectangular structure, and the orthographic projection of the first opening 533 and the light-emitting device 521 forms a U-shaped structure. As shown in Table 1, the light source component 50 remains unchanged except for the opening structure. The full-screen brightness of the light source component 50 is 98%, and the lamp-end brightness is 97%. In the embodiment of this disclosure, the first opening 533 shown in Figure 2 has a larger opening area than the first opening 533 shown in Figure 1. As shown in Table 1, the full-screen brightness of the light source component 50 designed with the first opening 533 is 100%, and the lamp-end brightness is 100%, thus improving the luminous brightness of the light source component 50. The first adhesive layer includes LED strip tape, such as black and white LED strip tape; the lamp-end brightness refers to the brightness of the light-emitting area of ​​the light-emitting device.

[0212] Table 1

[0213] In an optional embodiment, as shown in FIG2, the closer to the edge of the light-emitting device 521 along the first direction, the smaller the distance between the boundary of the light-emitting device 521 and the second boundary 5332. That is, the first opening 533 of the first adhesive layer 53 shown in FIG2 is a single-sided arc-shaped structure. The opening of the first opening 533 in the second direction is larger at the middle position of the light-emitting device 521, and smaller at the edge position of the light-emitting device 521, forming a shape with a small opening at both sides and a large opening in the middle. The brightness of the light source assembly 50 is increased by increasing the opening area. For example, the distance between the second boundaries 5332 of the first opening 533, that is, the opening depth of the second boundary 5332 of the first opening 533 in the second direction, is 0.15-0.25 mm. Those skilled in the art can design it according to actual applications. It should be noted that the opening depth of the second boundary 5332 of the first opening 533 in the second direction is 0.15-0.25 mm, that is, the opening depth of the second boundary 5332 of the first opening 533 in the second direction is greater than or equal to 0.15 mm and less than or equal to 0.25 mm.

[0214] In this embodiment of the disclosure, there is a gap between the second boundary 5332 of the first opening 533 and the second side 532 of the first adhesive layer 53. For example, the length of the first adhesive layer 53 at the gap position is ≥0.4mm in the second direction to ensure the fixing performance of the first adhesive layer 53 at the non-opening position.

[0215] In an optional embodiment, based on the single-sided protruding first opening 533 design shown in FIG2, the first opening 533 further includes a third boundary 5333 and a fourth boundary 5334 perpendicular to the first boundary 5331 and disposed opposite to each other. The distance between the third boundary 5333 and the fourth boundary 5334 is greater than the length of the light-emitting device 521 in the first direction, and the length of the third boundary 5333 and / or the fourth boundary 5334 in the second direction is greater than the length of the light-emitting device 521 in the second direction. That is, the orthographic projection of the first opening 533 on the first substrate layer 511 completely covers the orthographic projection of the light-emitting device 521 on the first substrate layer 511.

[0216] In an optional embodiment, as shown in FIG4, a first break DK01 is formed at both ends of the protruding portion of the second boundary 5332. The length of the first break DK01 in the first direction is less than or equal to the length of the light-emitting device 521 in the first direction. The brightness of the light in the strong light area of ​​the light-emitting device 521 is enhanced by the first break DK01 formed by the second boundary 5332.

[0217] For example, as shown in the enlarged schematic diagram of FIG4, the second boundary 5332 includes a first sub-boundary 53321 connected to the third boundary 5333, a second sub-boundary 53322 connected to the fourth boundary 5334, a third sub-boundary 53323 further away from the signal lead-out portion 513 in a second direction than the first sub-boundary 53321, a fourth sub-boundary 53324 connecting the first sub-boundary 53321 and the third sub-boundary 53323, and a fifth sub-boundary 53325 connecting the second sub-boundary 53322 and the third sub-boundary 53323.

[0218] In this embodiment, the end of the first sub-boundary 53321 away from the third boundary 5333 and the end of the second sub-boundary 53322 away from the fourth boundary 5334 form a first break DK01. The length of the first break DK01 in the first direction is less than or equal to the length of the light-emitting device 521 in the first direction, thereby forming a raised opening that covers part of the light-emitting area of ​​the light-emitting device 521.

[0219] Based on the single-boundary protruding opening structure design of the first opening 533 described above, the present invention further designs a second opening 534.

[0220] In an optional embodiment, as shown in FIG4, the first adhesive layer 53 has a second opening 534 at the position of each of the light-emitting devices 521 on the second side 532. The second opening 534 includes a protruding portion in the direction close to the first side 531, that is, the protruding portion of the second opening extends from the second side 532 toward the first side 531.

[0221] The distance between the center line of the second opening 534 parallel to the second direction and the center line of the light-emitting device 521 parallel to the second direction is less than or equal to 1 / 10 of the length of the light-emitting device 521 in the first direction. That is, the opening centers of the first opening 533 and the second opening 534 are set correspondingly to ensure the maximum improvement of light efficiency.

[0222] As shown in Figure 4, the first opening 533 and the second opening 534 corresponding to the same light-emitting device 521 are arranged opposite to each other. The opening of the first opening 533 protrudes upward and is opened at the position of the light-emitting device 521. The second opening 534 is opened from the edge position of the first adhesive layer 53 away from the signal lead-out part 513 and protrudes downward. The combined design of the first opening 533 and the second opening 534 increases the opening area of ​​the side-entry light-emitting light source perpendicular to the light-emitting surface, thereby improving the luminous brightness of the light source assembly 50.

[0223] In an optional embodiment, as shown in FIG4, the two ends of the protruding portion of the second boundary 5332 form a first break DK01, the length of the first break DK01 in the first direction is less than or equal to the length of the light-emitting device 521 in the first direction.

[0224] The two ends of the protruding portion of the second opening 534 corresponding to the second side portion 532 form a second break DK02. The length of the second break DK02 in the first direction is less than or equal to the length of the first break DK01 in the first direction. That is, the overall opening length of the second opening 534 is less than the overall length of the first opening 533, and the brightness of the area with strong light emitted from the light-emitting device 521 is enhanced by the second opening 534.

[0225] In an optional embodiment, as shown in FIG4, there is a gap between the second boundary 5332 of the first opening 533 and the opening boundary of the second opening 534, and the length of the first adhesive layer 53 at the gap location is ≥0.4mm in the second direction. In this embodiment, the first opening 533 and the second opening 534 are not connected and are separated by a gap.

[0226] In another optional embodiment, as shown in Figures 5 and 6, the second opening 534 extends to the first opening 533, and the second opening 534 and the first opening 533 are connected. The connection between the second opening 534 and the first opening 533 forms a first opening boundary OA1 and a second opening boundary OA2, respectively. The distance between the first opening boundary OA1 and the second opening boundary OA2 in the first direction is less than the length of the first break DK01 in the first direction.

[0227] In this embodiment, the first opening 533 and the second opening 534 are connected. The second opening 534 can have different opening area designs as shown in Figures 5 and 6. However, the opening length of the second opening 534 in the first direction is smaller than the opening length of the first opening 533 in the first direction, so as to further enhance the luminous brightness of the light source assembly 50 by utilizing the second opening 534 to allow the light from the strong light area of ​​the light-emitting device 521.

[0228] The length of the second opening 534 in the first direction is different from the length of the first opening 533 in the first direction. Therefore, in an optional embodiment, as shown in Figures 5 and 6, a light-emitting focal point OO' is formed between the non-light-emitting surface of the light-emitting device and the center line of the light-emitting device 521 parallel to the second direction.

[0229] The angle α formed by the first opening boundary OA1 and the light-emitting focal point OO' is less than or equal to 45°;

[0230] The angle α formed by the second opening boundary OA2 and the light-emitting focal point OO' is less than or equal to 45°. This setting ensures that the second opening 534 is located in the strong light area emitted by the light-emitting device 521, resulting in uniform brightness of the backlight module used in the light source assembly 50.

[0231] Based on the structural design of the first adhesive layer 53 with different openings in the above embodiments, the inventors further designed the layer structure of the first adhesive layer 53, which can further enhance the luminous brightness of the light source component 50. The structural design of the first adhesive layer 53 in this embodiment is as follows:

[0232] In an optional embodiment, as shown in Figures 7 and 8, the first adhesive layer 53 includes:

[0233] The first substrate layer 54 includes a third surface 54A and a fourth surface 54B disposed opposite to each other, wherein the third surface 54A is closer to the first surface 511A than the fourth surface 54B.

[0234] A first adhesive layer 55 is disposed on the third surface 54A;

[0235] The second adhesive layer 56 is disposed on the fourth surface 54B.

[0236] In an optional embodiment, as shown in Figures 7 and 8, at least the third surface 54A of the first substrate layer 54 is white, and at least the fourth surface 54B of the first substrate layer 54 is white.

[0237] The above-described embodiments of this disclosure utilize the principle that white light reflects more light. The black and white surfaces of the first adhesive layer 53 in the related technology are changed to white for the third surface 54A and the fourth surface 54B of the first substrate layer 54, forming a high reflectivity structure, thereby improving the luminous brightness of the light source assembly 50.

[0238] The scheme described in this disclosure, which states that "at least the third surface 54A of the first substrate layer 54 is white and at least the fourth surface 54B of the first substrate layer 54 is white", includes a scheme where the entire layer structure of the first substrate layer 54 is white, and also includes a scheme where the layer structure below a certain thickness of the first substrate layer 54 is white. The design criterion is that both sides of the first substrate layer 54 that are bonded to the first adhesive layer 55 and the second adhesive layer 56 are white, thereby achieving a first adhesive layer 53 structure with high optical reflectivity.

[0239] In an optional embodiment, the first substrate layer 54 is a PET layer.

[0240] In an optional embodiment, as shown in FIG7, the first substrate layer 54 is a transparent substrate.

[0241] The first substrate layer 54 includes:

[0242] The first screen printing layer 57 is located between the first adhesive layer 55 and the third surface 54A; and

[0243] The second screen printing layer 58 is located between the second adhesive layer 56 and the fourth surface 54B, and the material of the first screen printing layer 57 and the second screen printing layer 58 is screen printing white oil.

[0244] In this embodiment, a screen printing process is performed on the third surface 54A and the fourth surface 54B of the transparent first substrate layer 54 to form a screen-printed white ink layer. That is, the first screen-printed layer 57 and the second screen-printed layer 58 form a partially thick, white first substrate layer 54, creating a high-reflectivity structure. In an optional embodiment, the first adhesive layer 53 further includes a second anti-reflective layer disposed between the first screen-printed layer 57 and the first adhesive layer 55. For example, when the light source assembly 50 is applied to a backlight module, the third surface 54A is closer to the light guide plate 30 than the fourth surface 54B. In this embodiment, the second anti-reflective layer is disposed on the third surface 54A of the first substrate layer 54, which is closer to the light guide plate 30, to further enhance the optical reflectivity using the high-reflectivity second anti-reflective layer.

[0245] In an optional embodiment, as shown in FIG8, the first substrate layer 54 is a white substrate. In this embodiment, the first substrate layer 54, which is made of a transparent material in the related art, is chromatic to form a white film layer. That is, the entire film layer structure of the first substrate layer 54 is white, forming a high reflectivity structure.

[0246] Furthermore, in an optional embodiment, the first adhesive layer 53 further includes a first anti-reflective layer (not shown in the figure) disposed between the third surface 54A and the first adhesive layer 55. For example, when the light source assembly 50 is applied to the backlight module, the third surface 54A is closer to the light guide plate 30 than the fourth surface 54B. In this embodiment, the first anti-reflective layer is disposed on the third surface 54A of the first substrate layer 54 which is closer to the light guide plate 30. For example, the anti-reflective material of the first anti-reflective layer is an organosiloxane or an ultra-white coating. The main component of the ultra-white coating is barium sulfate. The optical reflectivity is further improved by using the high reflectivity of the first anti-reflective layer.

[0247] Based on the first adhesive layer 53 with different opening structures in the above embodiments, combined with the high reflectivity first adhesive layer 53 structure, the brightness values ​​obtained from the experiment are shown in Table 2 below:

[0248] Table 2

[0249] As can be seen from Table 2 above, the present invention only improves the layer structure design of the first adhesive layer 53, while the rest of the design remains unchanged. The average brightness of the entire screen and the average brightness of the lamp opening in the present invention are improved compared with the performance of the first adhesive layer 53 using black and white adhesive in the related technology. Therefore, the opening design of the first adhesive layer 53 in the present invention, combined with the opening design of the above embodiments, can further improve the brightness design of the light source component 50 and the backlight module.

[0250] Based on the above embodiments, the embodiments of this disclosure can adopt different combination schemes of different opening designs such as single first opening 533 design and double opening design combined with the double-sided white design of the first adhesive layer 53. The brightness data of the double-sided black and white design of the first adhesive layer 53 combined with the rectangular opening of the above different schemes and related technologies are shown in Table 3 below.

[0251] Table 3

[0252] As shown in Table 3, whether it is the single first opening improvement scheme or the different combination schemes formed by the double-sided black and white design of the first adhesive layer 53 and the double-sided white design of the first adhesive layer 53 combined with different openings, both can improve the brightness of the light source component 50 and the brightness of the backlight module. Therefore, the technical solutions of the above embodiments of this disclosure have wide applicability.

[0253] Furthermore, although the opening design of the first adhesive layer 53, combined with the opening design of the above embodiment, can greatly improve the brightness, it will cause serious defects such as a bright band at the lamp opening of the backlight module, and the high reflectivity lamp adhesive will lose reliability under high temperature and humidity, and the adhesive will age and easily highlight the yellowing of the lamp opening. Therefore, this disclosure further designs the light source component 50 to solve the above defects.

[0254] To address the issue of severe bright bands at the lamp opening, in one optional embodiment, the first adhesive layer 55 is doped with diffused particles 550, wherein the number of diffused particles 550 distributed per unit millimeter area is 10 to 15, and the peel strength of the first adhesive layer 55 is 1800 to 2400 gf / 25 mm.

[0255] It should be noted that the peel strength of the first adhesive layer 55 being 1800-2400 gf / 25 mm means that the peel strength of the first adhesive layer 55 is greater than or equal to 1800 gf / 25 mm and less than or equal to 2400 gf / 25 mm.

[0256] In this embodiment, when the light source assembly 50 is applied to the backlight module, the first adhesive layer 55 is closer to the light guide plate 30 than the second adhesive layer 56. In this embodiment, diffusion particles 550 are added to the first adhesive layer 55 on the side closer to the light guide plate 30. The diffusion particles 550 can evenly diffuse the light that is incident on the double-sided white first adhesive layer 53 from the lamp opening side, thereby reducing the problem of lamp opening brightness.

[0257] For example, the scattering particle diameter is 3 ± 0.5 micrometers (µm), and 1 square millimeter (mm). 2 The number of diffused particles added is 10-15.

[0258] In an optional embodiment, the first adhesive layer further includes an azo dye to shift the peak of the first adhesive layer to 560–600 nm.

[0259] It should be noted that azo dyes are chromophores of dyes, which combine with electron donors (e.g., amino, hydroxyl groups) or electron-withdrawing groups (e.g., nitro, sulfonic acid groups) through conjugated systems (e.g., aromatic rings or conjugated double bonds) to form different colors.

[0260] In an optional embodiment, the peel force of the first adhesive layer 55 and the second adhesive layer 56 is 1800-2400 gf / 25 mm, and the high-temperature holding force of the first adhesive layer 55 and the second adhesive layer 56 is 0-0.5 mm. Further, the high-temperature holding force of the first adhesive layer 55 and the second adhesive layer 56 is 0.1-0.3 mm. While ensuring that the peel force, holding force and other properties of the first adhesive layer 55 remain basically unchanged, the first adhesive layer 55 has a light scattering function.

[0261] In an optional embodiment, as shown in FIG18, the first substrate layer 54 includes multiple substrate sublayers 5401 stacked together; the refractive indices of any two adjacent substrate sublayers 5401 are different.

[0262] The light source assembly provided in this embodiment has a first substrate layer composed of stacked substrate sublayers with different refractive indices, which can improve the transmittance of the first substrate layer and thus improve the brightness of the light source assembly.

[0263] In an optional embodiment, as shown in FIG18, the multilayer substrate sublayer 5401 includes: an alternately disposed first substrate sublayer 54011 and a second substrate sublayer 54012; the refractive index of the first substrate sublayer 54011 is greater than the refractive index of the second substrate sublayer 54012.

[0264] In an optional embodiment, as shown in FIG18, the substrate sublayer 5401 closest to the first adhesive layer (not shown) in the multilayer substrate sublayer 5401 is the first substrate sublayer 54011, and the substrate sublayer 5401 furthest from the first adhesive layer (not shown) in the multilayer substrate sublayer 5401 is the second substrate sublayer 54012.

[0265] In an optional embodiment, the first substrate layer includes a substrate sublayer with a number of layers greater than or equal to 300 and less than or equal to 600.

[0266] The first substrate layer provided in this embodiment has a number of substrate sublayers greater than or equal to 300 and less than or equal to 600, and the transmittance can reach about 95%, while the reflectance of screen printing white ink is about 90%. By using multiple substrate sublayers to replace screen printing white ink on transparent PET substrates, the brightness is expected to be improved by 2% to 3%.

[0267] In an optional embodiment, when the first substrate layer is composed of stacked substrate sublayers with different refractive indices,

[0268] In an optional embodiment, the second adhesive layer includes an adhesive substrate and thermally conductive microparticles.

[0269] The light source assembly provided in this disclosure, by adding a second adhesive layer to the first driving board as a heat source, can improve the heat dissipation performance of the light source assembly.

[0270] In an optional embodiment, the thermally conductive particles are made of aluminum nitride.

[0271] This allows for improved heat dissipation performance of the second adhesive layer while maintaining its insulation properties.

[0272] In an optional embodiment, the thermally conductive particles have a mass percentage greater than or equal to 30% and less than or equal to 60%, and the particle size of the thermally conductive particles is greater than or equal to 0.1 micrometers and less than or equal to 13 micrometers.

[0273] In an optional embodiment, during the fabrication of the second adhesive layer, after the addition of thermally conductive microparticles to the adhesive substrate, ball milling, ultrasonication, or high-shear stirring can be used to prevent the thermally conductive microparticles from agglomerating.

[0274] In an optional embodiment, the second adhesive layer further includes a dispersant. This can improve the interfacial bonding performance between the second adhesive layer and other film materials. The dispersant is, for example, a silane coupling agent.

[0275] In an optional embodiment, the second adhesive layer further includes an tackifying material, thereby improving the adhesion of the second adhesive layer.

[0276] In an optional embodiment, the peel strength of the second adhesive layer is greater than or equal to 1800gf / 25mm.

[0277] For example, the second adhesive layer retains a strength of 0 to 0.5 mm at a high temperature of 80 degrees Celsius (°C) for 24 hours (H).

[0278] In an optional embodiment, the tackifying material is a tackifying resin.

[0279] In an optional embodiment, the light source assembly further includes: a phosphor layer located on the light-emitting surface of the light-emitting device;

[0280] At least some of the light-emitting devices have fluorescent layers that include red phosphor or green phosphor; and / or at least some of the light-emitting devices have fluorescent layers that include yellow phosphor.

[0281] In an optional embodiment, the phosphor layer corresponding to the light-emitting device includes red phosphor or green phosphor. That is, the light source assembly does not include yellow phosphor, which can further avoid the risk of light emanating from the lamp socket.

[0282] In an optional embodiment, the wavelength of the red phosphor is greater than or equal to 612 nanometers (nm) and less than or equal to 631 nm.

[0283] In an optional embodiment, the green phosphor has a wavelength greater than or equal to 527 nm and less than or equal to 540 nm.

[0284] In an optional embodiment, the wavelength of the yellow phosphor is greater than or equal to 549 nm and less than or equal to 570 nm.

[0285] In an optional embodiment, the light-emitting device is a light-emitting diode (LED) chip.

[0286] In one optional embodiment, the light-emitting device includes multiple PN junctions; these PN junctions are electrically connected via wiring, thereby increasing the LED chip voltage. This, in turn, can improve the brightness of the light-emitting device and the brightness of the light source assembly. For example, the light-emitting device includes two PN junctions.

[0287] It should be noted that conventional LED chips have a single PN junction structure, resulting in lower brightness. A brightness comparison between conventional LED chips and the LED chips provided in the embodiments of this disclosure is shown in Table 4. The LED chips in this disclosure are all 2.6 mm long, 0.6 mm wide, and 0.4 mm thick. The LEDs in disclosures 1-5 include two PN junctions. It can be seen that the LEDs of this disclosure, by including multiple PN junctions, can improve backlight brightness without increasing the number of LEDs.

[0288] Table 4

[0289] In an optional embodiment, the red phosphor constitutes a mass percentage of 14% or more and less than or equal to 20% of the fluorescent layer.

[0290] In an optional embodiment, the green phosphor constitutes a mass percentage of 17% or more and less than or equal to 25% of the fluorescent layer.

[0291] In an optional embodiment, the yellow phosphor constitutes a mass percentage of 18% or more and less than or equal to 20% of the fluorescent layer.

[0292] It should be noted that in related technologies, the mass percentage of red phosphor in the fluorescent layer is greater than or equal to 5% and less than or equal to 20%, the mass percentage of green phosphor in the fluorescent layer is greater than or equal to 10% and less than or equal to 25%, and the mass percentage of yellow phosphor in the fluorescent layer is greater than or equal to 13% and less than or equal to 20%. That is, the embodiments disclosed in this disclosure are equivalent to increasing the mass percentage of phosphor, i.e., the concentration. Since the light-emitting device includes multiple PN junctions, the voltage can be increased. By increasing the voltage, the excitation efficiency of the phosphor is improved, which can further enhance the brightness of the light source component.

[0293] In an optional embodiment, as shown in FIG9, the first driving board 51 further includes a coating layer 514. The coating layer 514 is located between the first surface 511A and the light-emitting component 52 near the first surface 511A, and between the first surface 511A and the first adhesive layer 53 near the first surface 511A. The orthographic projection of the coating layer 514 onto the first base layer 511 covers the first base layer 511. This embodiment utilizes the coating layer 514 to protect the conductive layer 512 and the first base layer 511 of the first driving board 51.

[0294] In an alternative embodiment, the coating layer needs to expose the area where the first driver board is electrically connected to the light-emitting component.

[0295] To address the issue of yellowing of the lamp opening due to aging of the first adhesive layer 53 after high temperature and humidity testing of the light source component 50, in an optional embodiment, the coating layer 514 is light blue in color with a wavelength range of 475–520 nm. Using a light blue coating layer 514 in combination with a double-sided white first adhesive layer 53 can effectively improve the yellowing effect of the lamp opening.

[0296] The embodiments of this disclosure show a significant improvement in the brightness of light source components 50 with different colored coating layers 514 and different first adhesive layer 53 structures, as well as the yellowing of the lamp opening after HTS (high temperature storage at 80°C for 240 hours) tests. Specific data are shown in Table 5 below. It can be seen that the lamp opening effect after high temperature reliability test of double-sided white first adhesive layer 53 + light blue coating layer 514 is better than that after high temperature reliability test of double-sided black and white first adhesive layer 53 + white coating layer 514. Therefore, the design of the first adhesive layer 53 of double-sided white first adhesive layer 53 + light blue coating layer 514 in the embodiments of this disclosure has wide applicability.

[0297] Table 5

[0298] As can be seen from Table 5, although using a light blue coating layer can improve the light emission problem at the lamp opening, there is a slight loss in brightness. Therefore, when higher brightness is required, in an optional embodiment, the coating layer is white, as the white coating film has high reflectivity in the visible light wavelength range.

[0299] In an optional embodiment, as shown in FIG1, the first drive board 51 further includes a second base layer 515, which is disposed on the side of the conductive layer 512 away from the first surface 511A, that is, between the first base layer 511 and the second base layer 515 of the conductive layer 512, and the first base layer 511 and the second base layer 515 are used to protect the conductive layer 512.

[0300] In the stacking direction of the light source assembly 50 shown in Figure 1, from top to bottom, there are a second base layer 515, a conductive layer 512, a first base layer 511, and a coating layer 514. A first adhesive layer 53 is disposed on the surface of the coating layer 514 away from the first substrate, that is, the first adhesive layer 53 is located on the outermost surface of the first driving plate 51. The first adhesive layer 53 has a first opening 533 to expose the surface of the coating layer 514 away from the first substrate. A light-emitting device 521 is disposed at the position of the coating layer 514 exposed through the first opening 533 on the surface away from the first substrate. After the light source assembly 50 of this embodiment is applied to the backlight module, the first adhesive layer 53 is bonded and fixed to the light guide plate 30.

[0301] A second embodiment of this disclosure provides a backlight module 1, the backlight module 1 comprising:

[0302] A back plate 10 with grooves, the back plate 10 including a bottom wall 101 and a side wall 102;

[0303] A reflective sheet 20 is disposed on the bottom wall 101;

[0304] The light guide plate 30 disposed on the reflective sheet 20, for example, requires the color difference uniformity of the injection molding of the light guide plate to be within 0.012, and the water boil warpage of the light guide plate 30 to be within 0.4mm.

[0305] A scattering film 40 disposed on the light guide plate 30; and

[0306] The present disclosure includes the light source assembly 50 of the above embodiments.

[0307] As shown in Figure 10, when the light source assembly 50 of the above embodiment is applied to the backlight module 1, the light guide plate 30 and the light source assembly 50 are first fixed. The first adhesive layer 53 of the light source assembly 50 away from the signal lead-out portion 513 is fixed to the surface of the light guide plate 30 away from the reflector 20. The first adhesive layer 53 of the light source assembly 50 near the signal lead-out portion 513 is fixed to the side wall 102 of the back plate 10. After assembly, the light-emitting surface 5213 of the light-emitting device 521 and the side wall surface of the light guide plate 30 perpendicular to the side wall 102 are attached.

[0308] The optical brightness of the light source component 50 in the above embodiments of this disclosure is effectively improved. Therefore, based on the data in Tables 1, 2 and 3, it can be seen that after the light source component 50 is applied to the backlight module 1, the full-screen brightness of the backlight module 1 is also improved.

[0309] Based on the backlight module 1 with the light source component 50 described above, the light guide plate 30 of the backlight module 1 is further designed in this embodiment to further improve the overall brightness of the backlight module 1.

[0310] In this embodiment, the thickness of the first adhesive layer 53 of the backlight module 1 ranges from 0.06 to 0.085 mm, with an optimal thickness of 0.08 mm recommended, as this thickness provides the best adhesion to the light guide plate 30.

[0311] In an optional embodiment, the light guide plate 30 includes a fifth surface 30A on the side close to the back plate 10 and a sixth surface 30B on the side away from the back plate 10, as shown in FIG10. The first adhesive layer 53 and the sixth surface 30B are bonded and fixed, as shown in FIG11 and FIG12. A dot structure 301 is provided on the fifth surface 30A in the area corresponding to the display area AA. The dot structure 301 includes dots of different sizes.

[0312] Alternatively, in an optional embodiment, as shown in FIG19, the light guide plate 30 is divided into: a first region VA and a second region NVA located between the first region VA and the light-emitting component 52; the first region VA corresponds to the display area; for example, the first region VA does not completely overlap with the display area;

[0313] A dotted structure 301 is provided on the fifth surface 30A in the first region VA.

[0314] It should be noted that the second area is the light mixing compensation area.

[0315] That is, the dot structure 301 of this embodiment is disposed on the non-adhesive side surface of the light source assembly 50 and the light guide plate 30, thereby reducing the influence of the adhesive surface of the two on light dispersion.

[0316] In an optional embodiment, the dot area projected onto the bottom wall is smaller for the dots closer to the light-emitting component in at least a portion of the dot structure; and / or, the dot depth is smaller for the dots closer to the light-emitting component in at least a portion of the dot structure.

[0317] The dot structure 301 of this embodiment includes dots of different sizes, and the dot structure 301 at different positions achieves uniform enhancement of light.

[0318] In an optional embodiment, as shown in Figures 11, 12, and 19, the dots in the dot structure 301 are smaller the closer they are to the light source assembly 50.

[0319] In an optional embodiment, the closer to the light source component, the smaller the projected area of ​​the dots on the bottom wall in the dot structure that are closer to the light-emitting component, and the smaller the dot depth that is closer to the light-emitting component.

[0320] In an optional embodiment, as shown in Figures 11, 12, and 19, the dots of the dot structure 301 are circular in the direction perpendicular to the bottom wall (not shown).

[0321] In an optional embodiment, as shown in Figures 11 and 12, the dot structure 301 includes a first dot area, a second dot area, and a third dot area arranged from the light source assembly 50 toward the light guide plate 30. The first dot area contains a plurality of first dots 3011, the second dot area contains a plurality of second dots 3012, and the third dot area contains a plurality of third dots 3013.

[0322] The diameter and depth of the first dot 3011 in the first dot area are smaller than the diameter and depth of the second dot 3012 in the second dot area, and the diameter and depth of the second dot 3012 in the second dot area are smaller than the diameter and depth of the third dot 3013 in the third dot area.

[0323] Specifically, the diameter of the first dot 3011 is smaller than the diameter of the second dot 3012, the depth of the first dot 3011 is smaller than the depth of the second dot 3012, the diameter of the second dot 3012 is smaller than the diameter of the third dot 3013, and the depth of the second dot 3012 is smaller than that of the third dot 3013.

[0324] In this embodiment of the present disclosure, the direction from the light source assembly 50 to the light guide plate 30, i.e. the direction from the first boundary 5331 to the second boundary 5332 as shown in FIG2, means that each dot of the dot structure 301 is designed to be gradually increased in size in the second direction.

[0325] As shown in Figures 11 and 12, the light guide plate 30 has a length of L in the second direction, a dot radius of R, a dot depth of H, and a dot angle of β. For the dot structures 301 at different positions, the first dot 3011 has a dot radius of R1, a dot depth of H1, and a dot angle of β1. The second dot 3012 has a dot radius of R2, a dot depth of H2, and a dot angle of β2. The third dot 3013 has a dot radius of R3, a dot depth of H3, and a dot angle of β3.

[0326] In an optional embodiment, the first, second, and third dot areas are uniformly distributed in length along the second direction. For example, the first dot area is located at the end of the light guide plate 30 near the light source assembly 50 along the second direction; that is, the first dot area is located at the head region of the light guide plate 30 at a distance of 1 / 3L from the light source assembly 50. The second dot area is located in the middle region of the light guide plate 30 along the second direction, with a length of 1 / 3L. The third dot area is located at the tail region of the light guide plate 30 along the third direction, with a length of 1 / 3L. The parameters of the dot structure 301 in different regions of the light guide plate 30 are shown in Table 6.

[0327] Table 6

[0328] The brightness parameters of the light guide plate 30 based on the dot structure 301 shown in Table 6 and related technologies in this embodiment are shown in Table 7 below.

[0329] Table 7

[0330] As shown in Table 7, the measured brightness of the gradient structure with varying dot size in this embodiment of the present disclosure is increased to 103% to 105%, which is a significant improvement over the brightness of uniform dots in related technologies.

[0331] In an optional embodiment, as shown in FIG19, in the second direction, the length of the light guide plate 30 is L; the distance from the dot 301-1 to the edge of the light guide plate 30 near the light-emitting component 52 is x, and the diameter d(x) of at least some of the dots 301-1 satisfies:

[0332] When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x;

[0333] When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L);

[0334] When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L).

[0335] The backlight module provided in this embodiment has a dot diameter that is related to the distance of the edge of the light guide plate near the light-emitting component, thereby further improving the light emission uniformity of the light guide plate.

[0336] In an optional embodiment, in the second direction, the length of the light guide plate is L; the distance from the dots to the edge of the light guide plate near the light-emitting component is x, and the depth H(x) of at least some of the dots satisfies:

[0337] When 0<x≤1 / 3L, d(x)=1.0+4.2x / L;

[0338] When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L;

[0339] When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L.

[0340] The backlight module provided in this embodiment has a dot depth that is related to the distance of the edge of the light guide plate near the light-emitting component, thereby further improving the light emission uniformity of the light guide plate.

[0341] In an optional embodiment, as shown in Figures 13 and 14, a scattering structure 302 is provided on the sixth surface 30B in the region corresponding to the display area AA. As shown in Figure 14, in this embodiment, the sixth surface 30B is the surface of the light guide plate 30 near the first adhesive layer 53, and the scattering structure 302 is provided in the display area AA, but not in the non-display area NA.

[0342] In an optional embodiment, a scattering structure is provided on the sixth surface 30B in the first region. The second region does not include a scattering structure.

[0343] In an optional embodiment, as shown in Figures 13 and 14, the scattering structure 302 is a plurality of toothed protrusions extending from the fifth surface 30A to the sixth surface 30B, the plurality of toothed protrusions being arranged in an array along a first direction, and each toothed protrusion extending along a second direction.

[0344] In an optional embodiment, as shown in FIG13, the arrangement direction of the plurality of toothed protrusions is the same as the arrangement direction of the light-emitting device 521, and the extension direction of each toothed protrusion is perpendicular to the arrangement direction of the light-emitting device 521, that is, each toothed protrusion extends along the second direction, and the brightness of the backlight module 1 is further improved by using the scattering structure 302.

[0345] Considering the process error during manufacturing, there may be a problem of poor brightness uniformity at different positions of the light guide plate 30. Therefore, in an optional embodiment, as shown in Figures 13 and 14, the scattering structure 302 is provided with a first compensation dot 303 on the side away from the fifth surface 30A. The first compensation dot 303 is distributed in the display area AA where the brightness of the light guide plate 30 is less than the preset brightness.

[0346] In an optional embodiment, as shown in Figures 13 and 14, a first compensation dot 303 is designed for the local area of ​​poor brightness uniformity of the dot surface of the light guide plate 30, thereby improving the local brightness of the light guide plate 30 and improving the overall brightness and display effect of the module display area AA. The laser compensation radius of the first compensation dot 303 is R0. For example, the diameter of the first compensation dot 303 formed after laser compensation is 40±10um.

[0347] In an optional embodiment, the laser patching depth of the first compensation dot 303 is H0, that is, the vertical distance between the highest point of the first compensation dot 303 and the sixth surface 30B, for example, H0 = 1.5 ± 0.5 μm;

[0348] The depth of the scattering structure 302 of the first compensation dot 303 is H1, which is the vertical distance between the highest point and the lowest point of the tooth-shaped protrusion of the scattering structure 302, H1 = 0.5~1.5um.

[0349] Table 8

[0350] This embodiment utilizes a scattering structure 302 to compensate for the brightness of the backlight module 1. Table 8 shows the brightness data of the large and small dot structure backlight module and the combined structure of the large and small dot structure + first compensation dot 303 in this embodiment. As can be seen from the test data in Table 8, the brightness data of the combined structure of the large and small dot structure + first compensation dot 303 in this embodiment are all improved. Based on the large and small dot structure, the brightness of the structure with the first compensation dot 303 on the sixth surface 30B is increased by 1-2%. Therefore, the large and small dot + first compensation dot 303 scheme can improve the brightness of the backlight module 1 by 4%-7% compared to related technologies, and has a wide range of applicable scenarios.

[0351] Based on the LED crossbeam principle, as shown in Figure 15, an optical dark area LT02 appears between adjacent light-emitting devices 521. This results in an optical dark area LT02 and an optical bright area LT01 at the lamp opening, causing display defects. To solve this problem, in an optional embodiment, a second compensation dot 304 is provided on the fifth surface 30A corresponding to the non-display area NA. The second compensation dot 304 is located at the interval between adjacent light-emitting devices 521, and the maximum length of the second compensation dot 304 in the first direction is greater than that of the adjacent light-emitting devices 521. As shown in Figure 16, the spacing length of adjacent light-emitting devices 521 in the first direction is such that no second compensation dots 304 are provided on the fifth surface 30A at the position directly in front of each light-emitting device 521, but second compensation dots 304 are provided in the gaps between adjacent light-emitting devices 521 on the fifth surface 30A. In this way, the second compensation dots 304 at adjacent positions are used to compensate for the light at the position of the dark area LT02 shown in Figure 15, so that the dark area LT02 shown in Figure 16 can also be compensated, thereby improving the display uniformity of the backlight module 1.

[0352] In an optional embodiment, the fifth surface 30A corresponds to the second region where a second compensation dot is provided.

[0353] In this embodiment, the second compensation dot 304 is disposed on the fifth surface 30A, that is, it is disposed on a different surface from the first compensation dot 303, and in a different area on the same surface from the dot structure 301. The orthographic projection of the second compensation dot 304 on the fifth surface 30A is a protruding structure extending from the boundary of the light guide plate 30 near the light-emitting device 521 to the side away from the light-emitting device 521, as shown in FIG16. The dot boundary of the second compensation dot 304 is located in the non-display area NA, so as to avoid damaging the dot structure 301 disposed on the fifth surface 30A of the display area AA.

[0354] For example, the orthographic projection of the second compensation dot on the fifth surface 30A is an arc structure, with the distance from the apex of the arc to the boundary of the non-display area NA ≥ 0.1mm. The dot diameter of the second compensation dot 304 is 35±3um, that is, twice the vertical distance from the highest point of the second compensation dot 304 to the boundary of the light guide plate 30 is 35±3um. The dot shape of the second compensation dot 304 is "n" shaped, and the density of the second compensation dot 304 is 1mm. 2 Arrange 1 to 1.5 of them to achieve uniform brightness of the light source. Those skilled in the art can design according to actual applications.

[0355] In an optional embodiment, the side of the light guide plate facing the light-emitting device includes multiple serrated structures. This further helps to prevent yellowing of the lamp opening. The multiple serrated structures can be formed, for example, by wire cutting or by grinding.

[0356] In an optional embodiment, as shown in FIG20, the light guide plate 30 includes: a first sub-part 6 and a second sub-part 7 located in the second region NVA on the side of the first sub-part 6 opposite to the bottom wall 101;

[0357] The surface of the second sub-part 7 on the side away from the bottom wall 101 is an inclined surface, and the angle α2 between the inclined surface and the plane direction parallel to the bottom wall 101 is greater than 0 and less than or equal to 5°.

[0358] In the backlight module provided in this embodiment, the light guide plate includes a wedge shape in the second region near the light-emitting device. This is beneficial for improving the light output brightness of the backlight module.

[0359] In an optional embodiment, in the second direction, the distance a3 from the light-emitting component 52 to the boundary between the first region VA and the second region NVA is greater than or equal to 1.75 mm;

[0360] The thickness a4 of the first sub-part 6 is greater than or equal to 0.34 mm.

[0361] The backlight module provided in this embodiment satisfies that a2 is greater than 0 and less than or equal to 5°, a3 is greater than or equal to 1.75 mm, and a4 is greater than or equal to 0.34 mm. This is beneficial to improve the light output brightness of the backlight module while avoiding the problem of local hot spots caused by excessive brightness at the lamp opening, and can improve the uniformity of the light output brightness of the backlight module.

[0362] In an optional embodiment, as shown in Figures 21-23, the backlight module further includes:

[0363] The frame 8 is located at least between the side wall 102 and the light guide plate 30;

[0364] The first reflective layer 9 is located on the side of the light guide plate 30 facing the frame 8.

[0365] It should be noted that, in an optional embodiment, the frame is light gray or dark gray in color, and the surface of the frame has low reflectivity. Direct light scattering from the edge of the light guide plate will significantly reduce the usable light energy, with a typical light energy loss of about 15%.

[0366] The backlight module provided in this embodiment has a first reflective layer on the side of the light guide plate facing the frame, which can reflect the light escaping from the edge of the light guide plate back into the light guide plate, thereby improving light utilization, increasing the overall light flux of the backlight module, and improving the brightness of the backlight module.

[0367] It should be noted that Figure 22 is, for example, a cross-sectional view along EE' in Figure 21, and Figure 23 is, for example, a cross-sectional view along FF' in Figure 21.

[0368] In an optional embodiment, as shown in FIG21, the light guide plate 30 includes: a first side MM1 and a second side MM2 disposed opposite to each other, and a third side MM3 and a fourth side MM4 disposed opposite to each other and connected to the first side MM1 and the second side MM2.

[0369] The first side MM1 is positioned opposite to the light-emitting component;

[0370] The first reflective layer 9 is located at least on the side of the second side MM2 facing the frame 8.

[0371] In an optional embodiment, as shown in FIG21, the first reflective layer 9 is also located on the side of the third side MM3 facing the frame 8 and the side of the fourth side MM4 facing the frame 8.

[0372] In an optional embodiment, as shown in FIG21, the light guide plate 30 includes a first region VA; the first region VA is divided into a first sub-region VA1 and a second sub-region VA2 outside the first sub-region VA1, the edge of the second sub-region VA2 is the edge of the light guide plate 30; the orthographic projection of the second sub-region VA2 on the bottom wall 101 is adjacent to the orthographic projection of the first reflective layer 9 on the bottom wall 101.

[0373] The diameter d(x) of the dots in the first subregion VA1 satisfies:

[0374] When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x;

[0375] When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L);

[0376] When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L)

[0377] And / or at least some of the network points have a depth H(x) that satisfies:

[0378] When 0<x≤1 / 3L, d(x)=1.0+4.2x / L;

[0379] When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L;

[0380] When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L;

[0381] The dots in the second sub-region VA2, which are identical in size, have different diameters and / or depths than the dots in the first sub-region VA1.

[0382] That is, the second sub-region is the area close to the first reflective layer. It should be noted that the placement of the first reflective layer can improve light utilization. If a first reflective layer is provided, the diameter d(x) of the dots in the first region satisfies the following conditions: when 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x; when 1 / 3L < x ≤ 2 / 3L, d(x) = 43 + 1 / 11(x - 1 / 3L); when 2 / 3L < x ≤ L, d(x) = 48 + 2 / 11(x - 2 / 3L) and / or the depth H(x) of the dots satisfies the following conditions: when 0 < x ≤ 1 / 3L, d(x) = 1.0 + 4.2x / L; when 1 / 3L < x ≤ 2 / 3L, d(x) = 1.7 + 7.8(xL / 3) / L; when 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L; if the second sub-region can still satisfy the brightness uniformity, then the dots in the second sub-region can still satisfy the above conditions. However, if the brightness uniformity of the second sub-region does not meet the requirements, the dot pattern of the second sub-region needs to be optimized so that the dot pattern of the second sub-region VA2 with the same x is different from the dot pattern of the first sub-region VA1, ensuring that the brightness uniformity of the dot pattern of the second sub-region is ≥78%.

[0383] In an optional embodiment, in the arrangement direction of the first sub-region VA1 and the second sub-region VA2, the width a8 of the second sub-region VA2 is 0.5 mm.

[0384] In an optional embodiment, as shown in Figures 22 and 23, the first reflective layer 9 covers the side of the light guide plate 30, and the width of the first reflective layer 9 in the direction perpendicular to the bottom wall 101 is equal to the width of the side of the light guide plate 30 in the direction perpendicular to the bottom wall 101.

[0385] The backlight module provided in this embodiment completely covers the side of the light guide plate with a first reflective layer that does not extend beyond the upper and lower surfaces of the light guide plate. This avoids gaps between the first reflective layer and the side of the light guide plate, which could affect light utilization. It also prevents the first reflective layer from affecting the upper and lower film layers of the light guide plate, thus preventing optical defects.

[0386] In an optional embodiment, in the first region, the thickness a6 of the light guide plate 30 is greater than or equal to 0.3 mm and less than or equal to 1 mm. Correspondingly, the width of the first reflective layer covering the side of the light guide plate is greater than or equal to 0.3 mm and less than or equal to 1 mm. This helps to ensure the coating effect of the first reflective layer.

[0387] In an optional embodiment, as shown in Figures 22 and 23, in the arrangement direction of the first reflective layer 9 and the light guide plate 30, the width a5 of the first reflective layer 9 is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0388] The distance between the first reflective layer 9 and the frame 8 is greater than 0.

[0389] For example, a5 is 0.15mm.

[0390] The backlight module provided in this embodiment has a distance greater than 0 between the first reflective layer and the frame, thereby avoiding contact between the two and affecting other scattering films and light-shielding tapes.

[0391] In an optional embodiment, as shown in Figures 22 and 23, the backlight module further includes a first light-shielding layer 11; the first light-shielding layer 11 is located on the side of the frame 8 away from the bottom wall 101, and the orthographic projection of the first reflective layer 9 on the bottom wall 101 falls into the orthographic projection of the first light-shielding layer 11 on the bottom wall 101.

[0392] The distance a7 between the orthographic projection of the edge of the first reflective layer 9 toward the light guide plate 30 on the bottom wall 101 and the orthographic projection of the edge of the first light shielding layer 11 toward the center of the light guide plate on the bottom wall 101 is greater than or equal to 0.1 mm.

[0393] The backlight module provided in this embodiment of the present disclosure has a first light-shielding layer whose orthogonal projection covers the orthogonal projection of the first reflective layer, thereby avoiding the first reflective layer from affecting the display effect.

[0394] For example, a7 is 0.15mm.

[0395] In an optional embodiment, the first light-shielding layer is light-shielding tape.

[0396] In an alternative embodiment, the first reflective layer comprises silver, a resin material, and a curing agent.

[0397] The first reflective layer includes silver paste. In an optional embodiment, the silver material in the first reflective layer is derived from silver powder, with a silver powder content of 80%–90%, and uses flake silver powder with a flake diameter of 3–10 μm; the resin material can be epoxy resin, with an epoxy resin content of 10%–15%, mainly using alicyclic epoxy resin; other additives can also be added to the first reflective layer, such as hindered phenolic antioxidants, to prevent the silver paste from oxidizing under high temperature and high humidity conditions. Curing agents and additives comprise 5%–10%.

[0398] Alternatively, in an optional embodiment, the first reflective layer comprises a resin material, an insulating filler, and a curing agent. The insulating filler comprises titanium dioxide.

[0399] The first reflective layer consists of white glue. The resin material in the white glue can be epoxy resin or silicone resin, with the epoxy resin or silicone resin content being 60%–70%, the insulating filler content being 30%–40%, and titanium dioxide being the main additive to improve the slow reflectivity. The curing agent content is 5%–10%.

[0400] Table 9 shows a comparison of the edge optical utilization rates of light guide plates with and without a first reflective layer. It can be seen that both the white adhesive and silver adhesive solutions can improve light utilization.

[0401] Table 9

[0402] In an optional embodiment, as shown in Figures 22 and 23, the backlight module includes a multilayer scattering film 40; the multilayer scattering film 40 includes:

[0403] Diffusion sheet 4001;

[0404] The first prism sheet 4002 is located on the side of the diffuser sheet 4001 that is away from the light guide plate 30;

[0405] The second prism sheet 4003 is located on the side of the first prism sheet 4002 that is away from the light guide plate 30.

[0406] In an optional embodiment, as shown in FIG24, the diffuser 4001 includes a first prism layer 40011, a second substrate layer 40012, and a diffuser layer 40013 stacked on the side of the light guide plate 30 away from the bottom wall 101; the first prism layer 40011 includes a plurality of first prisms 12 protruding toward the side of the light guide plate 30 and arranged along a second direction.

[0407] It should be noted that in related technologies, the surface of the diffuser facing the light guide plate is the surface of the second substrate layer, meaning the diffuser does not include the first prism layer. When the light emitted from the light guide plate is diffused by the diffuser, it is directly dispersed and enters the first prism sheet. However, in the backlight module provided in this embodiment, when the diffuser includes the first prism layer, the light emitted from the light guide plate is first collected by the prisms in the first prism layer, allowing the light to enter the next light-incident surface at a closer vertical angle, thereby improving the optical utilization rate of the backlight module and thus increasing the brightness of the backlight module.

[0408] In an optional embodiment, as shown in FIG25, the first prism sheet 4002 includes a plurality of second prisms 40021 that protrude from the side opposite to the bottom wall (not shown) and are arranged along a second direction (not shown).

[0409] The second prism sheet 4003 includes a plurality of third prisms 40031 that protrude from the side opposite to the light guide plate (not shown) and are arranged along the second direction (not shown); the extension direction of the second prism 40021 intersects the extension direction of the third prism 40031; the angle b1 between the extension direction of the third prism 40031 and the extension direction of the first prism 12 satisfies: a1-20°≤b1≤a1+20°; where a1 is 0° or 90°.

[0410] The backlight module provided in this embodiment satisfies b1: a1-20°≤b1≤a1+20°. This allows for further improvement in the optical utilization of the backlight module, thereby increasing its brightness, even when the extension direction of the third prism in the second prism sheet is determined. It also avoids excessive brightness at the lamp opening and the risk of moiré patterns.

[0411] In an optional embodiment, as shown in FIG25, the extension direction of the second prism 40021 is perpendicular to the extension direction of the third prism 40031.

[0412] In an optional embodiment, the angle between the extension direction of the third prism and the extension direction of the short side of the light guide plate is less than or equal to 20°, that is, the extension direction of the third prism is as close as possible to parallel to the short side of the module, which can reduce the risk of wrinkles in the scattering film.

[0413] In one optional embodiment, the extension direction of the third prism is parallel or perpendicular to the extension direction of the first prism. This maximizes the optical utilization of the backlight module.

[0414] In practice, the specific extension directions of the first prism, second prism, and third prism can be selected according to actual needs, provided that the above requirements are met.

[0415] For example, with a fixed extension direction of the third prism, the brightness patterns of different extension directions of the first prism are shown in Figures 26 and 27. In Figure 26, the angle on one side of the vertical axis represents the angle between the extension direction of the third prism and the second direction, and the horizontal axis in Figures 26 and 27 represents the angle between the extension direction of the first prism and the second direction. In Figure 27, the angle between the extension direction of the third prism and the second direction is 57°. It can be seen that: when the third prism is 135°, the brightness is maximized when the first prism is 45° and 135°; when the third prism is 150°, the brightness is maximized when the first prism is 60° (perpendicular to the third prism); when the third prism is 165°, the brightness is maximized when the first prism is 75° (perpendicular to the third prism); and when the third prism is 57°, the brightness is maximized when the first prism is 57° (parallel to the third prism).

[0416] In an optional embodiment, when the angle between the extension direction of the third prism and the second direction is 45-135°, the brightness gain is maximized when the first prism and the third prism are parallel. When the angle between the extension direction of the third prism and the second direction is 0-45° or 135-180°, the brightness gain is maximized when the first prism and the third prism are perpendicular, i.e., when the first prism and the second prism are parallel.

[0417] In an optional embodiment, as shown in FIG24, the diffusion layer 40013 includes: a plurality of first scattering particles 14 and a plurality of second scattering particles 13; the particle size of the first scattering particles 14 is different from the particle size of the second scattering particles 13.

[0418] It should be noted that when the angle between the extension direction of the first prism and the second direction of the diffuser is greater than 0, the light emitted from the light guide plate will undergo regular reflection and refraction when it enters the first prism. The best light output occurs when the angle of the first prism is parallel to the central ray of the light-emitting device, with the light emitted directly along the prism groove. However, this method is meaningless because it lacks the reflection and refraction of light by the first prism. At other angles of the first prism, there will be issues with light emission from the lamp opening.

[0419] The backlight module provided in this embodiment includes a diffusion layer comprising two types of scattering particles with different particle sizes. This improves the haze of the diffusion sheet and balances the luminous efficacy and brightness of the backlight module, thus avoiding light scattering issues from the lamp holder.

[0420] In an optional embodiment, the particle size of the first scattering particle is greater than or equal to 3 micrometers and less than or equal to 7 micrometers;

[0421] The particle size of the second scattering particle is greater than or equal to 8 micrometers and less than or equal to 12 micrometers.

[0422] In an optional embodiment, the first scattering particle has a particle size of 5 micrometers;

[0423] The second scattering particle has a diameter of 10 micrometers.

[0424] In an optional embodiment, the diffuser of the first prism, combined with the embodiment described above for the second compensation dots, can also balance the luminous efficacy and brightness of the backlight module, thus avoiding light scattering issues from the lamp opening.

[0425] In an optional embodiment, the dots are uniformly distributed in at least a portion of the edge of the first region facing the light-emitting device.

[0426] The backlight module provided in this disclosure, with the diffuser of the first prism combined with the embodiment described above where the dots closer to the dot structure of the light source component are smaller, so that the edge of the first region facing the light-emitting device is a fine dot, and the dots are evenly and sparsely distributed, can significantly reduce the regular concentrated reflection of light and alleviate the light reflection problem.

[0427] In practical implementation, including both evenly distributed dots and a second supplementary dot can further reduce the concentrated reflection of regular light, thus alleviating the problem of light scattering.

[0428] In practice, the size of the area with evenly distributed dots on the edge of the first region facing the light-emitting device can be set according to the actual desired lamp effect.

[0429] In an optional embodiment, as shown in Figures 28 and 29, the backlight module further includes:

[0430] The light-shielding support 15 is located in the second region NVA between the first light-shielding layer 11 and the light guide plate 30.

[0431] The backlight module provided in this embodiment has a light-shielding support in the second region, which further shields the light-incident end, reduces the amount of light entering the lamp display area, and further alleviates the light scattering problem.

[0432] In an optional embodiment, as shown in Figures 29 and 30, the light-shielding support 15 is located on the side of the diffuser 4001 away from the light guide plate 30.

[0433] In an optional embodiment, as shown in FIG28, the light-shielding support 15 is located on the side of the diffuser 4001.

[0434] The backlight module provided in this embodiment has a light-shielding support located on the side of the diffuser. Compared to when the light-shielding support is located above the diffuser, this can further improve the light-shielding effect, reduce the amount of light entering the lamp display area, and further alleviate the light scattering problem.

[0435] In an optional embodiment, as shown in Figures 28 and 29, the display module further includes:

[0436] The second light-shielding layer 16 is located in the second region NVA between the diffuser 4001 and the light guide plate 30.

[0437] It should be noted that, as shown in Figure 30, when only a light-shielding support is set, although some light can be blocked by the light-shielding support, the light from the lamp opening cannot be effectively avoided.

[0438] The backlight module provided in this embodiment has a second light-shielding layer in the second region, which can further improve the light-shielding effect at the light incident end and further alleviate the light reflection problem.

[0439] In an optional embodiment, the second light-shielding layer is a black light-shielding strip or screen-printed black ink.

[0440] In an optional embodiment, the second light-shielding layer is a black light-shielding strip, as shown in FIG28. The orthographic projection of the second light-shielding layer 16 on the bottom wall 101 is located within the orthographic projection of the second region NVA on the bottom wall 101.

[0441] In an optional embodiment, the thickness of the black light-shielding strip is ≤0.015mm, the adhesion of the black light-shielding strip is ≥800gf, the OD value of the black light-shielding strip is ≥5, and the distance between the black light-shielding strip and the boundary between the first and second regions is 0 to 0.1mm.

[0442] In an optional embodiment, the second light-shielding layer is screen-printed black ink. Within permissible tolerances, the screen-printed black ink can be applied to the edge of the first area, and the portion of the screen-printed black ink in the first area has a width of less than 0.05 mm in the second direction.

[0443] In an optional embodiment, when the light-shielding support is located on the side of the diffuser, the thickness of the light-shielding support is greater than or equal to the total thickness of the diffuser, the first prism sheet, and the second prism sheet.

[0444] In an optional embodiment, when the light-shielding support is located on the side of the diffuser away from the light guide plate, the thickness of the light-shielding support is greater than or equal to the total thickness of the first prism sheet and the second prism sheet.

[0445] In an optional embodiment, when the light-shielding support is located on the side of the diffuser away from the light guide plate, as shown in FIG29, the diffuser layer 40013 of the diffuser 4001 exposes a portion of the second base layer 40012, and the light-shielding support 15 contacts the second base layer 40012.

[0446] The backlight module provided in this embodiment includes a diffuser sheet containing a first prism, and the extension direction of the first prism matches the extension direction of the third prism in the second prism sheet. Compared with the case where no first prism is provided, the brightness can be increased by 7% to 9%. With the combination of multi-PN junction light-emitting devices and the solution of increasing the LED chip voltage, the overall brightness of the backlight module can be increased by 40% to 42%. When the backlight module is applied to display products, if the brightness meets the requirements, there is no need to set a brightness enhancement film, which can save costs.

[0447] Another embodiment of this disclosure provides a display module, as shown in FIG17, the display module comprising:

[0448] Backlight module 1 as described in the first embodiment of this disclosure;

[0449] The first polarizer 2 is disposed on the side of the backlight module 1 away from the back plate 10;

[0450] A display panel 3 is disposed on the first polarizer 2;

[0451] The second polarizer 4 disposed on the display panel 3, for example, requires edge crack control of ≤50um for both the first polarizer 2 and the second polarizer 4.

[0452] Based on the data in Tables 1 to 9 above, it can be seen that when the backlight module 1 of the above embodiments of this disclosure is applied to the display module, the display brightness of the assembled display module will also be improved.

[0453] In one optional embodiment, the hue parameter of the first polarizer 2 is 2.55 to 2.65; in another optional embodiment, the hue parameter of the second polarizer 4 is 2.55 to 2.65. This disclosure embodiment designs the hue parameters of the first polarizer 2 and the second polarizer 4. Polarizers with hue parameters between 2.55 and 2.65 have a bluish hue, and after testing, the brightness of the resulting backlight module 1 can be increased by 3%.

[0454] In an optional embodiment, the process of fabricating the polarizer includes a washing stage, a swelling stage, a dyeing stage, a color-correcting stage, a heating stage, and a dehydration stage. In this embodiment, during the dyeing stage, the PVA film is stretched using an iodine and potassium iodide solution.

[0455] In the color-correction stage, potassium iodide solution is used to correct the color of the PVA film. The concentration of the potassium iodide solution in the color-correction stage is lower than that in the dyeing stage. During this stage, iodide ions from the potassium iodide solution fill the gaps between the I3 complexes in the PVA film layer. Due to the lower concentration of the potassium iodide solution in the color-correction stage, the number of I5 complexes generated is reduced. In the heating and dehydration stage of the PVA film, the increased temperature can destroy the number of I5 complexes, decomposing some of them into I3 complexes, further reducing the proportion of I5 complexes. The resulting polarizer has a bluish hue, which can improve the overall brightness of the module by 3%.

[0456] The brightness and lamp effect of the display module formed by different combinations of the above embodiments are shown in Table 10 below:

[0457] Table 10

[0458] As can be seen from Table 10 above, the various combinations of embodiments of this disclosure can be designed according to different application requirements, for example:

[0459] For the combination of the light guide plate 30 dot structure and the sixth surface 30B first compensation dot, the brightness can be increased by 4% to 7%. Under the condition that the overall brightness of the backlight module 1 remains unchanged, the reflector 20 can be replaced by RMF-80 instead of ESR-80V2 to reduce costs. The cost per piece of the backlight module 1 can be reduced by 1.2 yuan, thus reducing manufacturing costs.

[0460] For the combination of light guide plate 30 dot structure + sixth surface 30B first compensation dot + first adhesive layer double white + first adhesive layer first opening and second opening + light blue coating layer + POL color temperature blue bias, this solution can increase the brightness by 20%. When the customer's brightness requirement is 600-800 nits, the number of scattering film 40 in backlight module 1 can be reduced, and the unit cost of backlight module 1 can be reduced by 0.35 yuan, thus reducing the manufacturing cost.

[0461] If customers are not very concerned about the effect of the lamp opening but have a high demand for the brightness of the backlight module 1, they can choose the combination of light guide plate large dot + sixth surface first compensation dot + first adhesive layer double white + first adhesive layer first opening and second opening + white coating layer + POL color temperature with blue bias, and the brightness of the display module can exceed 1000 nits.

[0462] If customers want both brightness and lamp effect in the display module, they can choose a light guide plate with large and small dots + first compensation dots on the sixth surface + double-sided white first adhesive layer + first and second openings on the first adhesive layer + light blue coating layer + POL color temperature with a bluish tint. The brightness of the display module can reach 900 nits, and the lamp effect of the display module is also better.

[0463] In summary, those skilled in the art can adopt different combinations of solutions according to different design requirements, so as to ensure a good display effect while meeting the design requirements.

[0464] In an optional embodiment, as shown in Figures 22 and 23, the first light-shielding layer 11 overlaps with the scattering film 40, and overlaps with all four sides of the scattering film 40. Specifically, the first light-shielding layer is located between the first polarizer and the second prism sheet. The thickness of the first light-shielding layer affects the overall thickness of the display product and also affects the brightness of the backlight module.

[0465] In an optional embodiment, the scattering film includes a body portion, the orthographic projection of the body portion on the bottom wall overlapping the orthographic projection of the light guide plate on the bottom wall;

[0466] The orthographic projection of the first light-shielding layer on the bottom wall does not overlap with the orthographic projection of the body of at least one of the multiple scattering films on the bottom wall.

[0467] This can further improve the brightness of the backlight module.

[0468] In an optional embodiment, as shown in FIG31, the first prism sheet 4002 includes a first body portion 17, and the second prism sheet 4003 includes a second body portion 18.

[0469] The orthographic projections of the first body part 17 and the second body part 18 on the bottom wall 101 overlap with the orthographic projection of the light guide plate 30 on the bottom wall 101.

[0470] The orthographic projection of the first light-shielding layer 11 onto the bottom wall 101 does not overlap with the orthographic projections of the first body part 17 and the second body part 18 onto the bottom wall 101.

[0471] In an optional embodiment, as shown in FIG31, the diffuser 4001 includes a third body portion 19, the orthographic projection of the third body portion 19 on the bottom wall 101 overlapping with the orthographic projection of the light guide plate 30 on the bottom wall 101.

[0472] The orthographic projection of the first light-shielding layer 11 onto the bottom wall 101 and the orthographic projection of the third body part 19 onto the bottom wall 101 do not overlap.

[0473] That is, the orthographic projections of the first light-shielding layer and the main body of the scattering film do not overlap, which can further improve the brightness of the backlight module.

[0474] Alternatively, in some embodiments, the orthographic projection of the first light-shielding layer on the bottom wall may overlap with the orthographic projection of a portion of the third body portion on the bottom wall facing the light-emitting device.

[0475] In an optional embodiment, as shown in FIG31, at least a portion of the orthographic projection of the first light-shielding layer 11 is located on the side of the orthographic projection of at least one scattering film 40 facing the sidewall 102.

[0476] In an optional embodiment, as shown in FIG31, the display module further includes:

[0477] The second adhesive layer 24 is located between the scattering film 40 and the first polarizer 2; for example, the second adhesive layer 24 is located between the second prism sheet 4003 and the first polarizer 2, that is, the second prism sheet 4003 and the first polarizer 2 are connected by the second adhesive layer 24.

[0478] In one optional embodiment, the second adhesive layer is double-sided tape. Further, the second adhesive layer is light-shielding double-sided tape, for example, pure black double-sided tape.

[0479] In an optional embodiment, as shown in FIG31, the thickness H8 of the second adhesive layer 24 is less than or equal to 0.015 mm. For example, H8 is 0.01 mm.

[0480] It should be noted that, as shown in Figure 31, when the first light-shielding layer 11 is light-shielding tape, the thickness H7 of the light-shielding tape is typically 0.05 mm. The thickness H8 of the pure black double-sided adhesive, i.e., the second adhesive layer 24, is 0.01 mm. This can further reduce the thickness of the backlight module. Furthermore, in the display module provided in this embodiment, the thickness H6 of the backplate 10, i.e., the bottom wall 101, can be reduced from 0.1 mm to 0.08 mm in related technologies, the thickness H4 of the light guide plate (LGP) 30 can be increased from 0.38 mm to 0.44 mm in related technologies, and the thickness H12 of the lamp-side light-emitting device 521 can be adjusted from 0.4 mm to 0.5 mm in related technologies, while the overall thickness of the backlight module remains unchanged. The brightness of the LGP is increased by 6%, and the brightness of the light-emitting device 521 is increased by 3%. The thickness of the display panel is adjusted from 0.3mm in related technologies to 0.26mm, and the thickness of the first polarizer is adjusted from 0.074mm in related technologies to 0.114mm, while the overall thickness of the first polarizer 2 and the display panel 1 remains unchanged. Furthermore, the first polarizer 2 is changed from a polarizer with a composite brightness enhancement film (APF) in related technologies to a polarizer with a composite brightness enhancement film (APF) and a high reflectance film (HCR) (POL) disclosed in this invention, which can increase the brightness by 9%. That is, the display module provided in this embodiment can achieve an overall brightness increase of 18% while maintaining the same thickness (H9 in Figure 31).

[0481] In an optional embodiment, as shown in Figures 32 and 33, the display panel includes a display area AA, and the orthographic projection of the second adhesive layer 24 on the bottom wall (not shown) does not overlap with the orthographic projection of the display area on the bottom wall (not shown).

[0482] In an optional embodiment, as shown in FIG31, the distance between the second adhesive layer 24 and the display area (not shown) is S3 at the edge of the second prism sheet away from the light-emitting device and at the edge of the second prism sheet extending along the second direction. S3 is greater than or equal to 0.2 mm and less than or equal to 0.25 mm. For example, S3 is 0.25 mm to ensure a wide viewing angle. S2 is the overlap width between the second adhesive layer 24 and the second prism sheet 4003. To ensure a light-blocking effect, S2 is ≥ 0.2 mm. For example, S2 is 0.22 mm.

[0483] In an optional embodiment, as shown in Figures 32 and 33, the first prism sheet 4002 further includes: first lugs 6 located on both sides of the first body portion (not labeled) in a first direction;

[0484] The first adhesive layer 53 includes a second lug 27;

[0485] The first lug 26 is connected to the second lug 27 on the side away from the bottom wall 101.

[0486] It should be noted that when the first light-blocking layer does not contact the second prism, it can easily affect the fixing effect of the second prism and the first prism.

[0487] The display module provided in this embodiment includes a first prism sheet, which is connected to a second prism sheet of the first adhesive layer. The first prism sheet is fixed by the first adhesive layer to prevent displacement of the first prism sheet from affecting the light output effect.

[0488] In an optional embodiment, as shown in Figures 32 and 33, the diffuser 29 has a first notch 29 that avoids the second lug 27, and the first lug 26 is connected to the second lug 27 at the first notch 29.

[0489] In an optional embodiment, as shown in Figures 32 and 33, the second prism sheet 4003 further includes: third lugs 28 located on both sides of the second body portion (not labeled) in the first direction;

[0490] The first light-shielding layer 11 includes an adhesive portion (not shown), which is bonded to the third lug 28.

[0491] The display module provided in this embodiment further includes a third lug on the second prism sheet. The third lug is bonded to the first light-shielding layer, that is, the second prism sheet is fixed by the first light-shielding layer to prevent displacement of the second prism sheet from affecting the light output effect.

[0492] In some embodiments, an adhesive layer may also be provided between the first prism sheet and the second prism sheet to further prevent them from moving.

[0493] In an optional embodiment, as shown in FIG33, the first lug 26 and the third lug 28 overlap in their orthographic projections onto the bottom wall 101. For example, the first lug 26 is connected to the second lug 27 at the first notch 29, and the third lug 28 is connected to the first light-shielding layer 11 in the area corresponding to the first notch 29.

[0494] Alternatively, in an optional embodiment, as shown in FIG32, the frame 8 includes a first limiting groove 801 for receiving a lug, the first lug 26 extending into the first limiting groove 801. A third lug 28 is bonded to a first light-shielding layer 11 on the side of the first limiting groove 801 away from the bottom wall (not shown).

[0495] The display module provided in this embodiment has a first limiting groove with a third lug in the frame, which can further fix the second prism sheet and prevent the second prism sheet from shifting.

[0496] In an optional embodiment, the frame includes an inner frame located on the sidewall facing the light guide plate, the inner frame including a first limiting groove.

[0497] In an optional embodiment, as shown in FIG32, the orthographic projections of the first lug 26 and the third lug 28 on the bottom wall 101 do not overlap.

[0498] The staggered design of the first lug 26 and the third lug 28 can further improve the fixing effect of the first prism sheet and the second prism sheet.

[0499] In an optional embodiment, as shown in Figures 34 and 35, the orthographic projection of the second adhesive layer 24 on the bottom wall 101 does not overlap with the orthographic projection of the display area AA on the bottom wall 101.

[0500] The second adhesive layer 24 is located only at the edge of the second prism sheet 4003.

[0501] In an optional embodiment, as shown in FIG34, the backlight module includes a third adhesive layer 31; the third adhesive layer 31 is a light-shielding adhesive layer.

[0502] The third adhesive layer 31 is located in the second region NVA between the diffuser 4001 and the light guide plate 30, and the third adhesive layer 31 extends to the side of the first drive plate 51 away from the bottom wall 101.

[0503] The projection of the light-shielding support 15 onto the bottom wall 101 overlaps with the projection of the third adhesive layer 31 onto the bottom wall 101.

[0504] The projection of the first light-shielding layer 11 onto the bottom wall 101 overlaps with the projection of the third adhesive layer 31 onto the bottom wall 101.

[0505] The display device provided in this embodiment has a region in which the third adhesive layer, the light-shielding support, and the first light-shielding layer are stacked in a direction perpendicular to the bottom wall, thereby blocking the light emitted from the light guide plate from entering from the sides of the first prism sheet and the second prism sheet, and further preventing light reflection.

[0506] In an optional embodiment, the third adhesive layer is black double-sided adhesive.

[0507] In an optional embodiment, the thickness of the third adhesive layer is less than or equal to 0.015 mm. For example, the thickness of the third adhesive layer is 0.01 mm.

[0508] In an optional embodiment, the third adhesive layer is reused as the second light-shielding layer.

[0509] In an optional embodiment, as shown in FIG34, the orthographic projection of the second adhesive layer 24 on the bottom wall 101 and the orthographic projection of the third adhesive layer 31 on the bottom wall 101 do not overlap.

[0510] In an optional embodiment, on the light-incident side, i.e., the side closer to the light-emitting device, as shown in FIG34, the gap between the third adhesive layer 31 and the second adhesive layer 24 is S15, the range of S15 is 0 to 0.15 mm, for example, S15 is 0.05 mm, and the assembly tolerance between the third adhesive layer 31 and the second adhesive layer 24 is ±0.01 mm; the overlap width between the third adhesive layer 31 and the first driving plate 51 is S11, the range of S11 is 0.5 to 1.0 mm, for example, S11 is 0.6 mm; the gap between the first driving plate 51 and the light-shielding support 15 is S16, the range of S16 is 0.15 mm to 0.25 mm, for example, S16 is 0.2 mm; the light-shielding support 15 The gap between the first light-shielding layer 15 and the first prism sheet 4002 is S14, and the range of S14 is 0.15mm to 0.25mm, for example, S14 is 0.2mm; the distance between the first light-shielding layer 11 and the first polarizer 2 is S17, and the range of S17 is 0.4mm to 0.6mm, for example, S17 is 0.4mm; the overlap width between the second adhesive layer 24 and the second prism sheet 4003 is S13, and the range of S13 is 0.35mm to 0.6mm, for example, S13 is 0.6mm; the distance from the second adhesive layer 24 to the display area AA is S12, and the range of S12 is 0.2mm to 0.25mm, for example, S12 is 0.25mm, thereby ensuring a wide viewing angle effect.

[0511] In an optional embodiment, as shown in FIG34, the edge of the first light-shielding layer 11 facing the display area AA is located on the side of the edge of the light-shielding support portion 15 facing the display area AA that is away from the display area AA, that is, the first light-shielding layer 11 does not extend beyond the right end face of the light-shielding support portion 15.

[0512] In an optional embodiment, as shown in FIG35, the orthographic projection of the second prism sheet 4003 on the bottom wall 101 falls within the orthographic projection of the first polarizer 2 on the bottom wall 101, that is, the first polarizer 2 includes not only the portion covering the second prism sheet 4003 but also the portion extending beyond the second prism sheet 4003.

[0513] In an optional embodiment, as shown in FIG35, the first polarizer 2 extends to the side of the first light-shielding layer 11 away from the bottom wall 101, that is, the first polarizer 2 overlaps with the first light-shielding layer 11.

[0514] In an optional embodiment, as shown in FIG35, the overlap width between the first polarizer 2 and the first light-shielding layer 11 is S21.

[0515] It should be noted that in the related technology, since the first polarizer is bonded to the second prism sheet through the first light-shielding layer, the overlap width between the first polarizer and the first light-shielding layer is at least 0.4 mm wider than S21 in Figure 35. Because the overlap width between the first polarizer and the first light-shielding layer is reduced, the first polarizer is prone to separating from the first light-shielding layer during module drop tests or thermal shock tests, leading to light leakage.

[0516] In an optional embodiment, S21 ≥ 0.6 mm. This ensures the overlap between the first polarizer and the first light-shielding layer, preventing separation of the first polarizer and the first light-shielding layer during testing without the need for additional protective designs.

[0517] Alternatively, in an optional embodiment, S21 < 0.6 mm, as shown in FIG35, the display module further includes:

[0518] The first fixing portion 64 is located at least on the side of the first polarizer 2 and the first light-shielding layer 11 away from the display area AA; for example, the first fixing portion 64 covers the side of the first polarizer 2, the first light-shielding layer 11, the frame 8, and a portion of the side wall 102; the first fixing portion 64 may also extend to cover the side of the display panel; when the side of the first light-shielding layer 11 and the side of the first polarizer 2 are not on the same plane, the first fixing portion 64 also includes a portion covering the surface of the first light-shielding layer 11 facing away from the bottom wall 101.

[0519] The display module provided in this embodiment is configured with a first bonding to improve the overlap effect between the first polarizer and the first light-shielding layer, thereby preventing the separation of the first polarizer and the first light-shielding layer and avoiding light leakage.

[0520] In an optional embodiment, the first consolidation portion is a consolidation adhesive.

[0521] In an optional embodiment, the maximum thickness of the first consolidation portion coated on the side of the display module is less than or equal to 0.1 mm.

[0522] In an optional embodiment, as shown in FIG35, the width of the frame 8 in contact with the first light-shielding layer 11 is S23; S21 is greater than S23, that is, the first light-shielding layer 11 also includes a portion of the frame 8 extending beyond the frame 8 on the side of the frame 8 away from the light guide plate 30.

[0523] In an optional embodiment, as shown in Figures 36, 37, and 38, the display panel further includes: a peripheral area NA surrounding the display area AA, and a first area NAA, the display area AA surrounding the first area NAA, the first area NAA including a light-transmitting area NAA1 and a light-shielding area NAA2 surrounding the light-transmitting area NAA1.

[0524] In an optional embodiment, as shown in Figures 31 and 39, the area corresponding to the first region NAA does not include the first light-shielding layer 11.

[0525] In an optional embodiment, as shown in Figures 31 and 39, the back plate 10 includes a first opening area TN1; in a direction perpendicular to the bottom wall 101, the orthographic projection of the first opening area TN1 falls within the orthographic projection of the first area NAA; for example, the orthographic projection of the first opening area TN1 overlaps with the orthographic projection of the light-transmitting area (not labeled).

[0526] The bottom wall 101 has a first opening 1011 in the first opening area TN1, and the side wall 102 includes a first side wall 1021 connected to the bottom wall 101 at the edge of the first opening 1011, and a second side wall 1022 connected to the bottom wall 101 at the outermost edge of the bottom wall 101; in the direction perpendicular to the bottom wall 101, the orthographic projection of the area surrounded by the first side wall 1021 is the orthographic projection of the first opening area TN1;

[0527] The light guide plate 30 includes a second opening area TN2 surrounding the first sidewall 1021 and the first opening area TN1, and the scattering film 40 includes a third opening area TN3 surrounding the first sidewall 1021 and the first opening area TN1; that is, the second opening area TN2 and the third opening area TN3 avoid the first sidewall 1021 and the first opening area TN1.

[0528] The first polarizer 2 includes a fourth aperture region TN4 corresponding to the first region NAA.

[0529] In an optional embodiment, as shown in Figures 31 and 39, the display module further includes a fourth adhesive layer 63 located between the scattering film 40 and the first sidewall 102 and the first polarizer 2. In the direction perpendicular to the bottom wall 101, the orthographic projection of the fourth adhesive layer 63 surrounds the orthographic projection of the first opening area TN1.

[0530] The fourth adhesive layer 63 is a light-shielding adhesive layer;

[0531] In the direction perpendicular to the bottom wall 101, the orthographic projection of the first region NAA covers the orthographic projection of the fourth adhesive layer 63, the first opening region TN1, the third opening region TN3, and the first sidewall 1021.

[0532] The display module provided in this embodiment uses a fourth adhesive layer to shield the light in the area of ​​the opening in the back panel.

[0533] In an optional embodiment, the fourth adhesive layer is black double-sided adhesive.

[0534] In an optional embodiment, the thickness of the fourth adhesive layer is less than or equal to 0.015 mm. For example, the thickness of the fourth adhesive layer is 0.01 mm.

[0535] In an optional embodiment, the fourth adhesive layer has an adhesive strength > 800 gf and an OD value > 4.5.

[0536] In an alternative embodiment, as shown in Figures 31 and 39, the fourth adhesive layer 63 extends to the side of the first sidewall 1021 opposite to the bottom wall 101.

[0537] In an optional embodiment, as shown in Figures 31 and 39, the display module further includes:

[0538] The second bonding portion 23 is located on the side of the first sidewall 1021 and the side of the display panel 1 facing the bottom wall 101 in the first opening area TN1; for example, the second bonding portion 23 is in contact with the side of the first sidewall 1021, the side of the first polarizer 2, the side of the fourth adhesive layer 63, and a portion of the surface of the display panel 1 facing the bottom wall 101. This can improve the structural stability of the display module and prevent film displacement.

[0539] In an optional embodiment, the second consolidation portion is a thermosetting adhesive.

[0540] In an optional embodiment, as shown in Figures 31 and 39, in the direction perpendicular to the bottom wall 101, the first sidewall 1021 has a first thickness H2, the first sidewall 1021 and the fourth adhesive layer 63 have a first distance H13, the surface of the scattering film 40 furthest from the light guide plate 30 on the side facing away from the bottom wall 101 has a second distance from the bottom wall 101, and the sum of the first thickness H2 and the first distance H13 is greater than or equal to the second distance.

[0541] In an optional embodiment, when the sum of the first thickness H2 and the first distance H13 is greater than the second distance, the sum of H2 and H13 minus the second distance is less than or equal to 0.01 mm. This prevents thermosetting adhesive from seeping into the backlight module.

[0542] In an optional embodiment, the fourth adhesive layer and the second adhesive layer are made of the same material and are disposed in the same layer; the fourth adhesive layer and the second adhesive layer have the same thickness.

[0543] In an optional embodiment, at least one of the second adhesive layer, the third adhesive layer, and the fourth adhesive layer is a light-shielding adhesive layer, and the light-shielding adhesive layer is a double-sided adhesive. As shown in FIG40, the light-shielding adhesive layer 65 includes: a light-shielding substrate layer 6501, and a first adhesive sublayer 6502 and a second adhesive sublayer 6503 respectively located on both sides of the light-shielding substrate layer 6501.

[0544] In an optional embodiment, the first adhesive sublayer and the second adhesive sublayer are light-shielding adhesive layers.

[0545] For example, the light-shielding substrate layer is black PET, and the first and second adhesive layers are black adhesive materials. The first and second adhesive layers include acrylic adhesives.

[0546] In an optional embodiment, the tack of the light-shielding adhesive layer is greater than 800 gf.

[0547] In an optional embodiment, when the light-shielding adhesive layer is not assembled, as shown in FIG40, it further includes: a first protective film 6504 and a second protective film 6505. The first protective film 6504 is located on the side of the first adhesive sub-layer 6502 facing away from the light-shielding substrate layer 6501, and the second protective film 6505 is located on the side of the second adhesive sub-layer 6503 facing away from the light-shielding substrate layer 6501. When the light-shielding adhesive layer needs to be assembled with the display module film material, the first protective film 6504 and the second protective film 6505 are removed. For example, the first protective film 6504 and the second protective film 6505 are release films.

[0548] It should be noted that light leakage is prone to occur in the first region at the L0 grayscale. When the first polarizer is combined with an APF, the APF reflects light that cannot pass through the first polarizer back into the backlight module. After reflection and refraction by various optical films in the backlight module, approximately 40% of the light is converted into light that can pass through the first polarizer, thus further increasing brightness and exacerbating the L0 light leakage level. Furthermore, because the first polarizer has a fourth opening region, some of the film material shrinks under high temperature and humidity conditions, causing deformation of the display panel at the fourth opening region. When the display panel is a liquid crystal display panel, there is no spacer to support the light-transmitting area. This deformation can lead to liquid crystal diffusion, causing a higher gap between the array substrate and the opposing substrate in that area, resulting in light leakage.

[0549] In an optional embodiment, as shown in Figures 37 and 38, the display panel 1 includes:

[0550] An array substrate 32 and a counter substrate 33 are arranged opposite to each other, and a liquid crystal layer 34 and a plurality of spacers 35 are located between the array substrate 32 and the counter substrate 33.

[0551] The opposing substrate 33 includes a third light-shielding layer 3301, and the third light-shielding layer 3301 includes a second opening region 36 located in the light-transmitting region NAA1;

[0552] The plurality of septa 35 include at least one first septa 3501 located in the light-transmitting area NAA1.

[0553] The display module provided in this embodiment uses a first spacer in the light-transmitting area of ​​the display panel for support, which improves the flatness of the light-transmitting area and thus avoids L0 light leakage. This enhances the display effect.

[0554] In an alternative embodiment, as shown in FIG37, the light-transmitting area NAA1 includes a plurality of first spacers 3501.

[0555] Alternatively, in an optional embodiment, as shown in FIG38, the light-transmitting area NAA1 includes only a first spacer 3501. This can further enhance the support effect of the first spacer in the light-transmitting area.

[0556] In an alternative embodiment, as shown in FIG38, the first spacer 3501 covers the second opening region 36 in the orthographic projection of the opposing substrate 33.

[0557] It should be noted that the flatness of the light-transmitting area needs to meet the requirement that the PV value ≤ 1λ, where λ is the wavelength of visible light. In related technologies, without a spacer in the light-transmitting area, the PV value defect rate (i.e., PV value greater than 1λ) for a display panel with a thickness of 0.3mm is 14%. When a first spacer is provided in the light-transmitting area, the PV value defect rate for a display panel with a thickness of 0.3mm is only 0.009%. In related technologies, without a spacer in the light-transmitting area, the PV value defect rate (i.e., PV value greater than 1λ) for a display panel with a thickness of 0.26mm is 31%. When a first spacer is provided in the light-transmitting area, the PV value defect rate for a display panel with a thickness of 0.3mm is only 0.013%. Therefore, the display module provided in this embodiment, by providing a first spacer for support in the light-transmitting area, can effectively improve the PV value yield of the display panel and avoid L0 light leakage problems in the light-transmitting area, thus improving the display effect.

[0558] In an optional embodiment, the array substrate includes a first substrate and a thin-film transistor located on the side of the first substrate facing the liquid crystal layer, and a pixel electrode and a common electrode located on the side of the thin-film transistor facing away from the first substrate; wherein, the gate, source and drain of the thin-film transistor are metal conductive layers, the pixel electrode and the common electrode are transparent conductive layers, the light-transmitting area does not include a metal conductive layer, and in order to further improve the transmittance of the light-transmitting area, the light-transmitting area does not include a transparent conductive layer.

[0559] In an optional embodiment, as shown in Figures 37 and 38, the opposing substrate 33 further includes a second substrate 3302, and a third light-shielding layer 3301 is located on the side of the second substrate 3302 facing the liquid crystal layer 34; the light-shielding region NAA2 includes the third light-shielding layer 3301.

[0560] The multiple septa 35 also include a second septa 3502 outside the light-transmitting area NAA1.

[0561] It should be noted that in the display module provided in this embodiment, the light-emitting device is a multi-PN junction light-emitting device. The higher voltage of these devices, compared to low-voltage light-emitting devices, may result in a higher display module temperature, potentially causing wrinkles in the optical film (e.g., scattering film) and affecting the display effect. For example, when the length of the light-emitting device is 2.6mm, the width is 0.6mm, and the thickness is 0.4mm, and the light source assembly includes 18 light-emitting devices, with a single-string current ≤14 mA, the display module can pass high-temperature operation tests at different temperatures. When the single-string current of the light-emitting device is greater than 14 mA, for example, 16 mA, the brightness can be increased by 52.8% compared to a single-PN junction light-emitting device, but wrinkles in the optical film are more likely to occur.

[0562] In an optional embodiment, as shown in Figures 41-45, the display module further includes:

[0563] At least one heat dissipation layer 38.

[0564] In an alternative embodiment, the heat dissipation layer is located on the bottom wall away from the display panel, or the heat dissipation layer is located on the side of the light source assembly facing the display panel.

[0565] The display module provided in this embodiment of the present disclosure further includes a heat dissipation layer, which can improve the heat dissipation efficiency of the display module. It can improve the brightness of the light-emitting device while avoiding excessive temperature of the display module causing wrinkles in the optical film material and affecting the display effect.

[0566] In an optional embodiment, as shown in Figures 41 and 42, at least one heat dissipation layer 38 includes:

[0567] The first heat dissipation layer 3801 is located on the side of the bottom wall 101 away from the display panel (not shown), that is, on the back side of the bottom wall 101; the orthographic projection of the first heat dissipation layer 3801 on the bottom wall 101 overlaps with the orthographic projection of the light-emitting component 52 on the bottom wall 101.

[0568] The display module provided in this embodiment has a first heat dissipation layer disposed on the back side of the bottom wall, thereby cooling the back side of the display module. Furthermore, the orthographic projection of the first heat dissipation layer on the bottom wall overlaps with the orthographic projection of the light-emitting component on the bottom wall, thereby effectively cooling the area where the light-emitting component is disposed, further improving the heat dissipation efficiency of the display module.

[0569] It should be noted that Figure 41 shows the back side of the bottom wall 101. In order to clearly show the orthographic projection relationship between the first heat dissipation layer 3801 and the light-emitting component 52, the area of ​​the light-emitting device 521 of the light-emitting component 52 is indicated by dashed lines in Figure 41.

[0570] In an optional embodiment, as shown in Figures 41 and 42, the orthographic projection of the light-emitting device 521 onto the bottom wall 101 falls within the orthographic projection of the first heat dissipation layer 3801 onto the bottom wall 101.

[0571] The display module provided in this embodiment has a first heat dissipation layer whose orthogonal projection on the bottom wall covers the orthogonal projection of the light-emitting device on the bottom wall, thereby further improving the cooling speed of the area where the light-emitting component is located and further improving the heat dissipation efficiency of the display module.

[0572] In an optional embodiment, as shown in Figures 41 and 42, the first heat dissipation layer 3801 has a first edge 72 in the orthographic projection of the bottom wall 101. The first edge 72 is located on the side where the orthographic projection of the light-emitting device 521 in the bottom wall 101 faces the orthographic projection of the light guide plate 30 in the bottom wall 101.

[0573] In the second direction, the distance between the edge of the orthographic projection of the light-emitting device 521 onto the bottom wall 101 and the first edge 72 is a first distance H10, which is greater than or equal to 8 mm and less than or equal to 15 mm. This ensures the heat dissipation effect of the first heat dissipation layer and improves the heat dissipation efficiency of the display module.

[0574] In an optional embodiment, as shown in FIG41, in the first direction, the distance between the edge of the first heat dissipation layer 3801 projected onto the bottom wall 101 and the projection of the light-emitting device 521 closest to that edge in the light-emitting assembly 52 onto the bottom wall 101 is a second distance H11, which is greater than 0. That is, the area covered by the first heat dissipation layer needs to extend beyond the light-emitting device at the edge of the light-emitting assembly in the first direction. This ensures the heat dissipation effect of the first heat dissipation layer and improves the heat dissipation efficiency of the display module.

[0575] In an optional embodiment, the second spacing H11 corresponding to the two edges of the first heat dissipation layer extending along the second direction may be equal or unequal. For example, the second spacing H11 corresponding to the left edge of the first heat dissipation layer of the plurality of light-emitting devices is 0.72 mm, and the second spacing H11 corresponding to the right edge of the first heat dissipation layer of the plurality of light-emitting devices is 0.22 mm.

[0576] In an optional embodiment, as shown in Figures 41 and 42, the first heat dissipation layer 3801 has a second edge 73 in the orthographic projection of the bottom wall 101. The second edge 73 is located on the side of the orthographic projection of the light-emitting device 521 on the bottom wall 101 that is away from the orthographic projection of the light guide plate 30 on the bottom wall 101.

[0577] In the second direction, the distance between the edge of the orthographic projection of the light-emitting device 521 onto the bottom wall 101 and the second edge 73 is greater than 0. This ensures the heat dissipation effect of the first heat dissipation layer and improves the heat dissipation efficiency of the display module.

[0578] In an optional embodiment, the first heat dissipation layer is a graphite sheet.

[0579] In an optional embodiment, the thermal conductivity of the first heat dissipation layer is greater than 1500 W / m·°C. That is, the first heat dissipation layer is a high thermal conductivity graphite sheet. This further enhances the heat dissipation effect of the first heat dissipation layer and improves the heat dissipation efficiency of the display module.

[0580] Next, using a light-emitting device with a length of 2.6mm, a width of 0.6mm, and a thickness of 0.4mm, a light source assembly consisting of 18 light-emitting devices, and a single string current of 16mA, the temperature rise of the display module (TLCM) with different first heat dissipation layer settings was tested. The test results are shown in Table 11. In the TLCM temperature rise column, the temperature on the left (e.g., 53.1℃ without a first heat dissipation layer) is the highest temperature at the lamp port on the light-emitting surface, and the temperature on the right (e.g., 53.4℃ without a first heat dissipation layer) is the highest temperature on the non-light-emitting lamp port side. It can be seen that setting a first heat dissipation layer can effectively cool the display module, and increasing the first spacing H10 is beneficial for cooling the display module. Using a first heat dissipation layer with a high thermal conductivity can effectively cool the display module.

[0581] Table 11

[0582] In practical implementation, using graphite sheets with high thermal conductivity and an H10 greater than or equal to 8 mm and less than or equal to 15 mm can achieve rapid cooling. However, if heat dissipation requirements are met, graphite sheets with non-high thermal conductivity (i.e., graphite sheets with a thermal conductivity less than or equal to 1500 W / m·°C) and an H10 greater than or equal to 8 mm and less than or equal to 15 mm can also be used.

[0583] Alternatively, in an optional embodiment, to further improve the heat dissipation effect, the first spacing H10 can be set to be greater than or equal to 14 mm.

[0584] In practical implementation, using graphite sheets with high thermal conductivity and an H10 greater than or equal to 14 mm can achieve rapid cooling. However, if heat dissipation requirements are met, graphite sheets with lower thermal conductivity (i.e., graphite sheets with a thermal conductivity less than or equal to 1500 W / m·°C) and an H10 greater than or equal to 14 mm can also be used.

[0585] In an optional embodiment, the display module further includes a second driver board; the second driver board is bonded to the display panel.

[0586] For example, both the first drive plate and the second drive plate are bent to the back of the bottom wall.

[0587] In an optional embodiment, as shown in FIG41, the first heat dissipation layer 3801 further includes at least one heat dissipation layer opening 71. FIG41 is illustrated by taking the first heat dissipation layer 3801 including two heat dissipation layer openings 71 as an example. The two heat dissipation layer openings 71 are: a first heat dissipation layer opening 7101 and a second heat dissipation layer opening 7102.

[0588] In an optional embodiment, the first drive board and the second drive board are bent to the back of the bottom wall and connected to the bottom wall at the opening in the heat dissipation layer. For example, one of the first drive board and the second drive board is connected to the bottom wall at the opening in the first heat dissipation layer, and the other is connected to the bottom wall at the opening in the second heat dissipation layer.

[0589] In an optional embodiment, as shown in FIG43, at least one heat dissipation layer 38 includes:

[0590] The second heat dissipation layer 3802 is located on the side of the first drive plate 51 away from the bottom wall 101. For example, the second heat dissipation layer 3802 is attached to the side of the first drive plate 51 away from the bottom wall 101.

[0591] The display module provided in this embodiment has a second heat dissipation layer on the back of the first driver board, which is prone to heat generation, thereby cooling the heat-generating area of ​​the first driver back board and improving the heat dissipation efficiency of the display module.

[0592] In an optional embodiment, the second heat dissipation layer is a conductive copper foil composite graphite heat dissipation layer.

[0593] In an optional embodiment, the orthographic projection of the second heat dissipation layer covers the orthographic projection of multiple light-emitting devices in the light-emitting assembly in a direction perpendicular to the bottom wall. This can further improve the heat dissipation efficiency of the display module.

[0594] In an optional embodiment, in the first direction, and in the direction perpendicular to the bottom wall, the distance between the edge of the orthographic projection of the second heat dissipation layer and the edge of the orthographic projection of the light-emitting device located at the edge of the light-emitting component is greater than 0. That is, the coverage area of ​​the second heat dissipation layer extends beyond the light-emitting component, meaning that the second heat dissipation layers on both the left and right sides extend beyond the edge light-emitting devices, which can improve the heat dissipation effect.

[0595] In an optional embodiment, as shown in FIG44, at least one heat dissipation layer 38 includes:

[0596] The third heat dissipation layer 3803 is located on the side of the first light-shielding layer 11 away from the bottom wall 101; the orthographic projection of the third heat dissipation layer 3803 on the bottom wall 101 overlaps with the orthographic projection of the light-emitting device 521 on the bottom wall 101. For example, the third heat dissipation layer 3803 is attached to the side of the first light-shielding layer 11 away from the bottom wall 101.

[0597] The display module provided in this embodiment has a first light-shielding layer located above the first driving board in the light source assembly. A third heat dissipation layer is attached above the first light-shielding layer in this area, which can cool down the heat-generating area of ​​the first driving backplate and improve the heat dissipation efficiency of the display module.

[0598] In an optional embodiment, the third heat dissipation layer is a conductive copper foil composite graphite heat dissipation layer.

[0599] In an optional embodiment, the orthographic projection of the third heat dissipation layer covers the orthographic projection of multiple light-emitting devices in the light-emitting assembly in a direction perpendicular to the bottom wall. This can further improve the heat dissipation efficiency of the display module.

[0600] In an optional embodiment, in the first direction, and in the direction perpendicular to the bottom wall, the distance between the edge of the orthographic projection of the third heat dissipation layer and the edge of the orthographic projection of the light-emitting device located at the edge of the light-emitting component is greater than 0. That is, the coverage area of ​​the third heat dissipation layer extends beyond the light-emitting component, meaning that the third heat dissipation layers on both the left and right sides extend beyond the edge light-emitting devices, which can improve the heat dissipation effect.

[0601] In an optional embodiment, as shown in FIG45, the display panel 1 includes a binding area NA1;

[0602] The display module also includes:

[0603] The second drive board 61 is bonded to the bonding area NA1 on the side of the display panel 1 away from the bottom wall 101;

[0604] At least one heat dissipation layer 38 includes:

[0605] The fourth heat dissipation layer 3804 is located on the side of the second drive board 61 away from the bottom wall 101.

[0606] The display module provided in this embodiment has a fourth heat dissipation layer on the back of the second driver board, which is prone to heat generation, thereby cooling the heat-generating area of ​​the first driver backplate and improving the heat dissipation efficiency of the display module.

[0607] In an optional embodiment, the fourth heat dissipation layer is a conductive copper foil composite graphite heat dissipation layer.

[0608] In an optional embodiment, the orthographic projection of the fourth heat dissipation layer covers the orthographic projections of multiple light-emitting devices in the light-emitting assembly in a direction perpendicular to the bottom wall. This can further improve the heat dissipation efficiency of the display module.

[0609] In an optional embodiment, in the first direction, and in the direction perpendicular to the bottom wall, the distance between the edge of the orthographic projection of the fourth heat dissipation layer and the edge of the orthographic projection of the light-emitting device located at the edge of the light-emitting component is greater than 0. That is, the coverage area of ​​the fourth heat dissipation layer extends beyond the light-emitting component, meaning that the fourth heat dissipation layers on both the left and right sides extend beyond the edge light-emitting devices, which can improve the heat dissipation effect.

[0610] Next, the temperature rise test results of different heat dissipation layer configurations for the display module (TLCM) with the heat dissipation layer located on the front of the bottom wall are presented. Using a light-emitting device with a length of 2.6mm, a width of 0.6mm, and a thickness of 0.4mm, a light source assembly consisting of 18 light-emitting devices, and a single string current of 16mA, the temperature rise of the display module (TLCM) with different heat dissipation layer configurations was tested. The test results are shown in Table 12. It can be seen that the copper foil composite graphite heat dissipation layer can effectively cool the display module. The cooling effect of setting a second heat dissipation layer on one side of the front of the bottom wall is better than that of setting a third or fourth heat dissipation layer.

[0611] Table 12

[0612] In one optional embodiment, the backplate comprises a metallic material with a thermal conductivity greater than 120 W / m·°C. That is, the backplate is a high thermal conductivity metal backplate. This improves the heat dissipation effect of the backplate and enhances the heat dissipation efficiency of the display module.

[0613] In an optional embodiment, the backplate is a nickel-plated copper plate or a nickel-plated aluminum plate.

[0614] Next, the temperature rise test results of different display module (TLCM) designs with high thermal conductivity metal backplates are presented. Using a light-emitting device with a length of 2.6mm, a width of 0.6mm, and a thickness of 0.4mm, a light source assembly consisting of 18 light-emitting devices, and a single string current of 16mA, the temperature rise of display modules (TLCM) with nickel-plated copper plates and nickel-plated aluminum plates was tested. The test results are shown in Table 13. It can be seen that using a high thermal conductivity metal backplate can effectively cool the display module.

[0615] Table 13

[0616] In an optional embodiment, the above-mentioned solutions for improving the heat dissipation efficiency of the display module can be set individually or in combination.

[0617] In an optional embodiment, the display module further includes at least one driver chip. In specific implementations, when using dual PN junction light-emitting devices, if the thermal power consumption of the backlight module plus the power consumption of the driver chip is ≤880 milliwatts (mW), for example, using a graphite sheet as the first heat dissipation layer with H10 greater than or equal to 7mm, the light-emitting component includes 18 light-emitting devices with a current of 14mA, the driver chip power consumption does not exceed 120mW, and the module brightness gain is 33.7%, the brightness of the display module can be significantly improved without excessively increasing costs. If the thermal power consumption of the backlight module plus the power consumption of the driver chip is >880 milliwatts (mW), the light-emitting component includes 18 light-emitting devices with a current of 16mA, and the module brightness gain is 52.8%, but there is a risk of wrinkling. For example, the following heat dissipation solutions can be selected: 1. Using a graphite sheet as the first heat dissipation layer with H10 of 14mm; 2. Using a graphite sheet as the first heat dissipation layer and simultaneously using a copper foil composite graphite heat dissipation layer as the second heat dissipation layer with H10 of 14mm; 3. Using a graphite sheet as the first heat dissipation layer and simultaneously using a copper foil composite graphite heat dissipation layer as the second heat dissipation layer with H10 of 14mm; A graphite sheet with a thermal conductivity greater than 1500 W / m·°C is used as the first heat dissipation layer, and a copper foil composite graphite heat dissipation layer is used as the second heat dissipation layer, with an H10 of 14 mm; 4. A graphite sheet with a thermal conductivity greater than 1500 W / m·°C is used as the first heat dissipation layer, and a copper foil composite graphite heat dissipation layer is used as the second heat dissipation layer, with an H10 of 7 mm; 5. A graphite sheet with a thermal conductivity greater than 1500 W / m·°C is used as the first heat dissipation layer, and a copper foil composite graphite heat dissipation layer is used as the fourth heat dissipation layer, with an H10 of 7 mm.

[0618] In an optional embodiment, as shown in FIG46, a plurality of light-emitting devices 521 have a first occupancy length D1 in a first direction;

[0619] The thermal power consumption W1 of the backlight module and the first occupancy length D1 satisfy the following condition: W1 / D1 is less than or equal to 14.5; where the first occupancy length D1 is in millimeters and the thermal power consumption W1 of the backlight module is in milliwatts.

[0620] The display module provided in this embodiment satisfies that W1 / D1 is less than or equal to 14.5, thereby ensuring sufficient heat dissipation space between the light-emitting devices. This allows for increased current of the light-emitting devices while avoiding wrinkles in the optical film of the backlight module caused by low heat dissipation efficiency.

[0621] In an optional embodiment, the first occupancy length D1 = the length of the light-emitting device in the first direction D11 × the number of light-emitting devices in the light-emitting assembly + the gap between adjacent light-emitting devices D12 × (the number of light-emitting devices in the light-emitting assembly - 1);

[0622] The heat dissipation W1 of the backlight module = number of light-emitting devices in the light-emitting component × maximum voltage of the light-emitting device Max × current of the light-emitting device × total heat dissipation efficiency of the backlight module.

[0623] It should be noted that, in an optional embodiment, if the condition W1 / D1 is less than or equal to 14.5, the risk of optical film wrinkling can be mitigated by reducing the current of the light-emitting device. Alternatively, the heat dissipation efficiency can be improved and the risk of optical film wrinkling can be mitigated by using the heat dissipation layer and high thermal conductivity metal backplate methods described in the embodiments of this disclosure.

[0624] In an optional embodiment, the double PN junction LED chip is shown in Figure 47. For example, the two PN junctions in the LED chip are electrically connected by traces. For example, the PN junctions are electrically connected by gold wires.

[0625] Another embodiment of this disclosure provides a display device, which includes the display module described in the above embodiments of this disclosure. The display device can be applied to any product or component with display function, such as electronic paper, mobile phones, tablets, televisions, monitors, laptops, digital photo frames, and navigators; this embodiment does not limit its application. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limitations on this disclosure. Implementation of this display device can refer to the embodiments of the light source assembly, backlight module, and display module described above; repeated details will not be repeated.

[0626] Although preferred embodiments of this disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this disclosure.

[0627] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A light source assembly, wherein, The light source assembly includes: a first driving board and a light-emitting component extending along a first direction and electrically connected to the first driving board, disposed on one side surface of the first driving board. The first driving board includes: a first base layer having a first surface and a second surface; a conductive layer disposed on one side of the second surface and connected to the light-emitting component; and a signal lead-out portion electrically connected to the conductive layer, the signal lead-out portion extending in a second direction perpendicular to the first direction. The light-emitting component is disposed on one side of the first surface and includes a plurality of light-emitting devices arranged along the first direction. The light source assembly further includes a first adhesive layer disposed on one side of the first surface, the first adhesive layer including a first side portion and a second side portion extending along the first direction, the first side portion being farther away from the signal lead-out portion than the second side portion. The first adhesive layer has a first opening at the position of each light-emitting device, the orthographic projection of the first opening on the first surface covering the orthographic projection of the light-emitting device on the first surface, the first opening including a first boundary and a second boundary extending along the first direction, the first boundary being farther away from the signal lead-out portion than the second boundary, the second boundary including a protruding portion in a direction away from the first boundary.

2. The light source assembly according to claim 1, wherein, The closer to the edge of the light-emitting device along the first direction, the smaller the distance between the boundary of the light-emitting device and the second boundary, and there is a gap between the second boundary and the second side.

3. The light source assembly according to claim 2, wherein, The two ends of the protruding portion of the second boundary form a first break, the length of the first break in the first direction is less than or equal to the length of the light-emitting device in the first direction; the first opening also includes a third boundary and a fourth boundary that are perpendicular to the first boundary and are disposed opposite to each other, the distance between the third boundary and the fourth boundary is greater than the length of the light-emitting device in the first direction, and the length of the third boundary or the fourth boundary in the second direction is greater than the length of the light-emitting device in the second direction.

4. The light source assembly according to claim 2, wherein, The first adhesive layer has a second opening at the second side corresponding to the position of each of the light-emitting devices. The second opening includes a protruding portion close to the first side. The distance between the center line of the second opening parallel to the second direction and the center line of the light-emitting device parallel to the second direction is less than or equal to 1 / 10 of the length of the light-emitting device in the first direction.

5. The light source assembly according to claim 4, wherein, The two ends of the protruding portion of the second boundary form a first fracture, the length of the first fracture in the first direction being less than or equal to the length of the light-emitting device in the first direction; the two ends of the protruding portion of the second opening corresponding to the second side position form a second fracture, the length of the second fracture in the first direction being less than or equal to the length of the first fracture in the first direction.

6. The light source assembly according to claim 5, wherein, The second opening extends to the first opening, and the second opening and the first opening are connected; the connection between the second opening and the first opening respectively forms a first opening boundary and a second opening boundary, and the distance between the first opening boundary and the second opening boundary in the first direction is less than the length of the first break in the first direction.

7. The light source assembly according to claim 6, wherein, The light-emitting device includes a first light-emitting device surface attached to a first surface, a second light-emitting device surface opposite to the first light-emitting device surface, a light-emitting device surface perpendicular to the first light-emitting device surface, and a non-light-emitting device surface opposite to the light-emitting device surface; a light-emitting focal point is formed between the non-light-emitting device surface and the light-emitting device centerline parallel to the second direction; the angle formed between the first opening boundary and the light-emitting focal point is less than or equal to 45°; the angle formed between the second opening boundary and the light-emitting focal point is less than or equal to 45°.

8. The light source assembly according to any one of claims 1 to 7, wherein, The first adhesive layer includes: a first substrate layer, including a third surface and a fourth surface disposed opposite to each other, wherein the third surface is closer to the first surface than the fourth surface; a first adhesive layer disposed on the third surface; and a second adhesive layer disposed on the fourth surface. At least the third surface of the first substrate layer is white, and at least the fourth surface of the first substrate layer is white; The first substrate layer is a white substrate; and / or the first adhesive layer further includes a first anti-reflective layer disposed between the third surface and the first adhesive layer.

9. The light source assembly according to any one of claims 1 to 7, wherein, The first substrate layer is a transparent substrate, and the first substrate layer includes: a first screen printing layer located between the first adhesive layer and the third surface; and a second screen printing layer located between the second adhesive layer and the fourth surface, wherein the material of the first screen printing layer and the second screen printing layer is screen printing white oil.

10. The light source assembly according to claim 9, wherein, The first adhesive layer further includes a second anti-reflective layer disposed between the first screen printing layer and the first adhesive layer.

11. The light source assembly according to any one of claims 1 to 7, wherein, The first adhesive layer includes: a first substrate layer, including a third surface and a fourth surface disposed opposite to each other, wherein the third surface is closer to the first surface than the fourth surface; a first adhesive layer disposed on the third surface; and a second adhesive layer disposed on the fourth surface. The first substrate layer comprises multiple substrate sublayers stacked together; the refractive indices of any two adjacent substrate sublayers are different; The second adhesive layer includes an adhesive substrate and thermally conductive microparticles.

12. The light source assembly according to claim 11, wherein, The material of the thermally conductive particles is aluminum nitride; The thermally conductive particles have a mass percentage greater than or equal to 30% and less than or equal to 60%, and the particle size of the thermally conductive particles is greater than or equal to 0.1 micrometers and less than or equal to 13 micrometers.

13. The light source assembly according to any one of claims 1 to 7, 10, and 12, wherein, The first driving board further includes a coating layer located between the first surface and the lamp assembly near the first surface, and between the first surface and the first adhesive layer near the first surface. The coating layer covers the first substrate layer in its orthogonal projection, and / or the coating layer is light blue in color with a wavelength range of 475-520 nm, or the coating layer is white in color.

14. The light source assembly according to any one of claims 1 to 7, 10, and 12, wherein, The light source assembly further includes: a fluorescent layer located on the light-emitting surface of the light-emitting device; At least some of the light-emitting devices have fluorescent layers that include red phosphor or green phosphor; and / or at least some of the light-emitting devices have fluorescent layers that include yellow phosphor; The red phosphor in the fluorescent layer has a mass percentage greater than or equal to 14% and less than or equal to 20%. The green phosphor constitutes a mass percentage of 17% or more and less than or equal to 25% in the fluorescent layer; The yellow phosphor constitutes a mass percentage of 18% or more and less than or equal to 20% in the fluorescent layer.

15. A backlight module, wherein, The backlight module includes: a back plate with a groove, the back plate including a bottom wall and a side wall; a reflective sheet disposed on the bottom wall; a light guide plate disposed on the reflective sheet; a scattering film disposed on the light guide plate; and a light source assembly according to any one of claims 1 to 14, wherein a first adhesive layer on the side of the light source assembly away from the signal lead-out portion is fixed to the surface of the light guide plate away from the reflective sheet, a first adhesive layer on the side of the light source assembly near the signal lead-out portion is fixed to the side wall of the back plate, and the light-emitting surface of the light-emitting device is bonded to the side wall surface of the light guide plate perpendicular to the side wall.

16. The backlight module according to claim 15, wherein, The light guide plate includes a fifth surface near the back plate and a sixth surface away from the back plate; The light guide plate is divided into: a first region corresponding to the display area and a second region located between the first region and the light-emitting component; The fifth surface has a dot structure in the first region; the dot structure includes multiple dots. At least some of the dot structures have smaller projected areas on the bottom wall for dots closer to the light-emitting component; and / or, at least some of the dot structures have smaller depths for dots closer to the light-emitting component.

17. The backlight module according to claim 16, wherein, The dot structure includes a first dot area, a second dot area, and a third dot area arranged from the light source assembly toward the light guide plate. The diameter and depth of the first dot in the first dot area are smaller than the diameter and depth of the second dot in the second dot area, and the diameter and depth of the second dot in the second dot area are smaller than the diameter and depth of the third dot in the third dot area.

18. The backlight module according to claim 16, wherein, In the second direction, the length of the light guide plate is L; the distance from the dot to the edge of the light guide plate near the light-emitting component is x, and the diameter d(x) of at least some of the dots satisfies: When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x; When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L); When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L).

19. The backlight module according to claim 16, wherein, In the second direction, the length of the light guide plate is L; the distance from the dots to the edge of the light guide plate near the light-emitting component is x, and the depth H(x) of at least some of the dots satisfies: When 0<x≤1 / 3L, d(x)=1.0+4.2x / L; When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L; When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L.

20. The backlight module according to any one of claims 15 to 19, wherein, A scattering structure is provided on the sixth surface and in the first region. The scattering structure consists of a plurality of toothed protrusions extending from the fifth surface to the sixth surface. The plurality of toothed protrusions are arranged in an array along a first direction, and each toothed protrusion extends along a second direction. The scattering structure has a first compensation dot on the side away from the fifth surface. The first compensation dot is distributed in the display area where the brightness of the light guide plate is less than the preset brightness.

21. The backlight module according to any one of claims 15 to 19, wherein, The fifth surface has a second compensation dot in the area corresponding to the non-display area. The second compensation dot is located at the interval between adjacent light-emitting devices. The maximum length of the second compensation dot in the first direction is greater than the interval length between adjacent light-emitting devices in the first direction. The orthographic projection of the second compensation dot on the fifth surface is a protruding structure extending from the boundary of the light guide plate near the light-emitting device to the side away from the light-emitting device.

22. The backlight module according to any one of claims 15 to 19, wherein, The light guide plate is divided into a first region and a second region; The light guide plate includes: a first sub-part and a second sub-part located in the second region on the side of the first sub-part away from the bottom wall; The surface of the second sub-part facing away from the bottom wall is an inclined surface, and the angle between the inclined surface and the plane parallel to the bottom wall is greater than 0 and less than or equal to 5°.

23. The backlight module according to claim 22, wherein, In the second direction, the distance from the light-emitting component to the boundary between the first region and the second region is greater than or equal to 1.75 mm; The thickness of the first sub-part is greater than or equal to 0.34 mm.

24. The backlight module according to any one of claims 15-19, 23, wherein, The backlight module also includes: The frame is located at least between the sidewall and the light guide plate; The first reflective layer is located on the side of the light guide plate facing the frame.

25. The backlight module according to claim 24, wherein, The light guide plate includes: a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other and connected to the first side and the second side; The first side is disposed opposite to the light-emitting component; The first reflective layer is located at least on the side of the second side facing the frame.

26. The backlight module according to claim 25, wherein, The first reflective layer is also located on the third side facing the frame and on the fourth side facing the frame.

27. The backlight module according to claim 25 or 26, wherein, The light guide plate includes a first region; the first region is divided into a first sub-region and a second sub-region other than the first sub-region, the edge of the second sub-region is the edge of the light guide plate; the orthographic projection of the second sub-region on the bottom wall is adjacent to the orthographic projection of the first reflective layer on the bottom wall; The diameter d(x) of the dots in the first sub-region satisfies: When 0 < x ≤ 1 / 3L, d(x) = 23 + 4 / 11x; When 1 / 3L<x≤2 / 3L, d(x)=43+1 / 11(x-1 / 3L); When 2 / 3L<x≤L, d(x)=48+2 / 11(x-2 / 3L) And / or at least some of the said dots have a depth H(x) that satisfies: When 0<x≤1 / 3L, d(x)=1.0+4.2x / L; When 1 / 3L<x≤2 / 3L, d(x)=1.7+7.8(xL / 3) / L; When 2 / 3L < x ≤ L, d(x) = 1.0 + 12.0(x - 2L / 3) / L; The dots in the second sub-region with the same x value have different diameters and / or depths than the dots in the first sub-region.

28. The backlight module according to claim 24, wherein, The first reflective layer covers the side of the light guide plate, and the width of the first reflective layer in the direction perpendicular to the bottom wall is equal to the width of the side of the light guide plate in the direction perpendicular to the bottom wall.

29. The backlight module according to claim 28, wherein, The thickness of the light guide plate is greater than or equal to 0.3 mm and less than or equal to 1 mm.

30. The backlight module according to claim 28, wherein, In the arrangement direction of the first reflective layer and the light guide plate, the width of the first reflective layer is greater than or equal to 0.1 mm and less than or equal to 0.2 mm; The distance between the first reflective layer and the frame is greater than 0.

31. The backlight module according to claim 24, wherein, The backlight module further includes a first light-shielding layer; the first light-shielding layer is located on the side of the frame away from the bottom wall, and the orthographic projection of the first reflective layer on the bottom wall falls within the orthographic projection of the first light-shielding layer on the bottom wall. The distance between the orthographic projection of the edge of the first reflective layer facing the light guide plate on the bottom wall and the orthographic projection of the edge of the first light-shielding layer facing the center of the light guide plate on the bottom wall is greater than or equal to 0.1 mm.

32. The backlight module according to any one of claims 15-19, 23, 25-26, 28-31, wherein, The backlight module includes multiple layers of the scattering film material; The multilayer scattering film material includes: The diffuser sheet includes a first prism layer, a second substrate layer, and a diffuser layer stacked on the side of the light guide plate opposite to the bottom wall; the first prism layer includes a plurality of first prisms that protrude toward the side of the light guide plate and are arranged along the second direction; The first prism sheet is located on the side of the diffuser sheet opposite to the light guide plate; the first prism sheet includes a plurality of second prisms that protrude from the side opposite to the bottom wall and are arranged along the second direction; The second prism sheet is located on the side of the first prism sheet facing away from the light guide plate; the second prism sheet includes a plurality of third prisms protruding from the side facing away from the light guide plate and arranged along the second direction; the extension direction of the second prism intersects the extension direction of the third prism; the angle b1 between the extension direction of the third prism and the extension direction of the first prism satisfies: a1-20°≤b1≤a1+20°; where a1 is 0° or 90°.

33. The backlight module according to claim 32, wherein, The diffusion layer includes: a plurality of first scattering particles and a plurality of second scattering particles; the particle size of the first scattering particles is different from that of the second scattering particles.

34. The backlight module according to claim 32, wherein, The backlight module also includes: A light-shielding support portion is located in the second region between the first light-shielding layer and the light guide plate; The light-shielding support is located on the side of the diffuser away from the light guide plate; or, The light-shielding support is located on the side of the diffuser.

35. The backlight module according to claim 34, wherein, The display module also includes: The second light-shielding layer is located in the second region between the diffusion layer and the light guide plate.

36. The backlight module according to claim 32, wherein, The scattering film includes a body portion, and the orthographic projection of the body portion on the bottom wall overlaps with the orthographic projection of the light guide plate on the bottom wall. The orthographic projection of the first light-shielding layer on the bottom wall does not overlap with the orthographic projection of the body portion of at least one of the multilayer scattering films on the bottom wall.

37. The backlight module according to claim 36, wherein, The first prism sheet includes a first body portion, and the second prism sheet includes a second body portion. The orthographic projections of the first body portion and the second body portion onto the bottom wall fall within the orthographic projection of the light guide plate onto the bottom wall; The orthographic projection of the first light-shielding layer on the bottom wall does not overlap with the orthographic projections of the first body portion and the second body portion on the bottom wall.

38. The backlight module according to claim 36 or 37, wherein, At least a portion of the orthographic projection of the first light-shielding layer is located on the side of the orthographic projection of the at least one scattering film material facing the sidewall.

39. The backlight module according to claim 38, wherein, The diffuser includes a third body portion, the orthographic projection of the third body portion on the bottom wall overlaps with the orthographic projection of the light guide plate on the bottom wall; The orthographic projection of the first light-shielding layer on the bottom wall and the orthographic projection of the third body portion on the bottom wall do not overlap; or, the orthographic projection of the first light-shielding layer on the bottom wall and the orthographic projection of a portion of the third body portion facing the light-emitting device on the bottom wall overlap.

40. The backlight module according to claim 37, wherein, The first prism sheet further includes: first lugs located on both sides of the first body portion in the first direction; The first adhesive layer includes a second lug; The first lug is connected to the second lug on the side of the second lug away from the bottom wall.

41. The backlight module according to claim 37 or 40, wherein, The second prism sheet further includes: third lugs located on both sides of the second body portion in the first direction; The first light-shielding layer includes an adhesive portion, which is bonded to the third lug.

42. The backlight module according to claim 41, wherein, The frame includes a first limiting groove for accommodating the lug, the first lug extending into the first limiting groove; The first lug and the third lug do not overlap in their orthographic projections onto the bottom wall.

43. The backlight module according to claim 41, wherein, The first lug and the third lug have overlapping projections on the bottom wall.

44. The backlight module according to any one of claims 15-19, 23, 25-26, 28-31, 33-37, 39-40, 42-43, wherein, The plurality of light-emitting devices have a first occupancy length D1 in the first direction, and the thermal power consumption W1 of the backlight module satisfies the condition that W1 / D1 is less than or equal to 14.5; wherein the unit of the first occupancy length D1 is millimeters, and the unit of the thermal power consumption W1 of the backlight module is milliwatts.

45. A display module, wherein, The display module includes: a backlight module according to any one of claims 15 to 44; a first polarizer disposed on the side of the backlight module away from the back panel; a display panel disposed on the first polarizer; and a second polarizer disposed on the display panel.

46. ​​The display module according to claim 45, wherein, The backlight module includes a second prism sheet and a first light-shielding layer; The orthographic projection of the first light-shielding layer onto the bottom wall and the orthographic projection of the second body portion of the second prism onto the bottom wall do not overlap; The display module also includes: The second adhesive layer is located between the second prism sheet and the first polarizer.

47. The display module according to claim 46, wherein, The light guide plate includes a second region, and the backlight module includes: a light-shielding support, a diffuser sheet, and a third adhesive layer; the third adhesive layer is a light-shielding adhesive layer. The third adhesive layer is located in the second region between the diffuser sheet and the light guide plate, and the third adhesive layer extends to the side of the first drive plate away from the bottom wall; The projection of the light-shielding support on the bottom wall overlaps with the projection of the third adhesive layer on the bottom wall; The projection of the first light-shielding layer onto the bottom wall overlaps with the projection of the third adhesive layer onto the bottom wall.

48. The display module according to claim 47, wherein, The orthographic projection of the second adhesive layer on the bottom wall and the orthographic projection of the third adhesive layer on the bottom wall do not overlap.

49. The display module according to claim 47, wherein, The display module also includes: At least one heat dissipation layer; the heat dissipation layer is located on the bottom wall away from the display panel, or the heat dissipation layer is located on the side of the light source assembly facing the display panel.

50. The display module according to claim 49, wherein, The at least one heat dissipation layer includes: The first heat dissipation layer is located on the side of the bottom wall away from the display panel; the orthographic projection of the light-emitting device on the bottom wall falls within the orthographic projection of the first heat dissipation layer on the bottom wall; The first heat dissipation layer has a first edge in the orthographic projection of the bottom wall, and the first edge is located on the side of the orthographic projection of the light-emitting device on the bottom wall that faces the orthographic projection of the light guide plate on the bottom wall; In the second direction, the distance between the edge of the orthographic projection of the light-emitting device on the bottom wall and the first edge is a first distance, which is greater than or equal to 8 mm and less than or equal to 15 mm.

51. The display module according to claim 50, wherein, In the first direction, the distance between the edge of the first heat dissipation layer's orthogonal projection on the bottom wall and the orthogonal projection of the light-emitting device closest to the edge on the bottom wall is a second distance, and the second distance is greater than 0.

52. The display module according to any one of claims 50 to 51, wherein, The thermal conductivity of the first heat dissipation layer is greater than 1500 W / m·°C; The first heat dissipation layer is a graphite sheet.

53. The display module according to any one of claims 49 to 51, wherein, The at least one heat dissipation layer includes: The second heat dissipation layer is located on the side of the first drive plate away from the bottom wall; The display module also includes a first light-shielding layer; The at least one heat dissipation layer includes: The third heat dissipation layer is located on the side of the first light-shielding layer away from the bottom wall; the orthographic projection of the third heat dissipation layer on the bottom wall overlaps with the orthographic projection of the light-emitting device on the bottom wall.

54. The display module according to any one of claims 49 to 51, wherein, The display panel includes a binding area; The display module also includes: The second driving board is bonded to the bonding area on the side of the display panel opposite to the bottom wall; The at least one heat dissipation layer includes: The fourth heat dissipation layer is located on the side of the second drive plate away from the bottom wall.

55. The display module according to any one of claims 49 to 51, wherein, The backplate comprises a metallic material and has a thermal conductivity greater than 120 W / m·°C.

56. The display module according to any one of claims 49 to 51, wherein, The display panel includes: a display area, a peripheral area surrounding the display area, and a first area, wherein the display area surrounds the first area and the first area includes a light-transmitting area; The display panel includes: An array substrate and a counter substrate are arranged opposite each other, and a liquid crystal layer and a plurality of spacers are located between the array substrate and the counter substrate; The opposing substrate includes a third light-shielding layer, and the third light-shielding layer includes a second opening area located in the light-transmitting area; The plurality of spacers includes at least one first spacer located in the light-transmitting area; The first spacer covers the second opening area in the orthographic projection of the opposing substrate.

57. The display module according to any one of claims 49 to 51, wherein, The display panel includes: a display area, a peripheral area surrounding the display area, and a first area; The back panel includes a first opening area; in a direction perpendicular to the bottom wall, the orthographic projection of the first opening area falls within the orthographic projection of the first area; the bottom wall has a first opening in the first opening area, and the side wall includes: a first side wall connected to the bottom wall at the edge of the first opening; The light guide plate includes a second opening area surrounding the first sidewall and the first opening area, and the scattering film includes a third opening area surrounding the first sidewall and the first opening area; The display module further includes a fourth adhesive layer located between the scattering film and the first sidewall and the first polarizer. In the direction perpendicular to the bottom wall, the orthographic projection of the fourth adhesive layer surrounds the orthographic projection of the first opening area. In the direction perpendicular to the bottom wall, the orthographic projection of the first region covers the orthographic projection of the fourth adhesive layer, the first opening region, the third opening region, and the first sidewall.

58. The display module according to claim 57, wherein, In the direction perpendicular to the bottom wall, the first sidewall has a first thickness, the first sidewall has a first distance from the fourth adhesive layer, the surface of the scattering film furthest from the light guide plate on the side facing away from the bottom wall has a second distance from the bottom wall, and the sum of the first thickness and the first distance is greater than or equal to the second distance.

59. A display device, wherein, The display device includes the display module according to any one of claims 45 to 58.

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