Backlight module, display module, and display apparatus

Abstract

The present application relates to the technical field of display devices, and discloses a backlight module, a display module, and a display apparatus. The backlight module comprises: a back plate comprising a bottom plate and a plurality of side plates connected to the edge of the bottom plate, wherein the plurality of side plates work in conjunction with the bottom plate to define an accommodating space; a light guide plate located in the accommodating space, wherein gaps are formed between the side surfaces of the light guide plate and the side plates; and a light-emitting assembly located in the accommodating space, wherein the light-emitting assembly comprises a flexible circuit board and a plurality of light sources. The flexible circuit board is located between the light guide plate and the bottom plate, the flexible circuit board comprises at least two light bar portions and a connecting portion, the at least two light bar portions are respectively arranged adjacent to side plates located on different sides, the extension direction of each light bar portion is the same as the extension direction of the side plate adjacent to the light bar portion, and the at least two light bar portions are electrically connected by means of the connecting portion. The plurality of light sources are arranged on the side of the light bar portions facing away from the bottom plate, and the light sources are located between the side surfaces of the light guide plate and the side plates. The backlight module can greatly increase the display brightness of a liquid crystal display module.

Description

A backlight module, a display module, and a display device.

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411479788.9, filed on October 22, 2024, entitled "A Backlight Module, Display Module and Display Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display device technology, and in particular to a backlight module, a display module, and a display device. Background Technology

[0004] In the prior art, a backlight module of a conventional liquid crystal display module usually uses a light strip. The solution to improve display brightness can be to increase the number of light-emitting diodes (LEDs) on the light strip, increase the current on the LEDs, or apply a high-brightness film material.

[0005] However, increasing the number of LEDs in a single LED strip, increasing the current on the LEDs, or applying high-brightness optical films can only slightly improve the brightness of a liquid crystal display module, and cannot match the display brightness of an organic light-emitting diode (OLED) display module. Summary of the Invention

[0006] This application provides a backlight module, a display module, and a display device, wherein the backlight module can significantly improve the display brightness of the liquid crystal display module.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A backlight module, comprising:

[0009] The back panel includes a bottom plate and a plurality of side plates connected to the edge of the bottom plate, the plurality of side plates cooperating with the bottom plate to form an accommodating space;

[0010] A light guide plate is located within the accommodating space, and there is a gap between the side of the light guide plate and the side plate;

[0011] A light-emitting element is located within the accommodating space, and the light-emitting element includes a flexible circuit board and multiple light sources;

[0012] The flexible circuit board is located between the light guide plate and the base plate. The flexible circuit board includes at least two light strips and a connecting portion. The at least two light strips are respectively disposed adjacent to the side plates located on different sides, and the extending direction of the light strip is the same as the extending direction of the adjacent side plate. The at least two light strips are electrically connected through the connecting portion.

[0013] The plurality of light sources are disposed on the side of each of the light strips away from the base plate, and the light sources are located between the side of the light guide plate and the side plate.

[0014] Optionally, the plurality of side plates include a first side plate and a second side plate disposed opposite to each other;

[0015] The flexible circuit board includes a first light strip portion and a second light strip portion, wherein the first light strip portion is disposed adjacent to the first side plate and the second light strip portion is disposed adjacent to the second side plate;

[0016] The connecting part is connected between the first light strip part and the second light strip part.

[0017] Optionally, the flexible circuit board is H-shaped.

[0018] Optionally, the flexible circuit board is bonded to the base plate via a first adhesive portion;

[0019] The first adhesive portion includes a first adhesive tape and a second adhesive tape;

[0020] One of the light strip portions is bonded to the base plate via the first adhesive tape;

[0021] The connecting part is bonded to the base plate by the second adhesive tape.

[0022] Optionally, the back plate has a wiring groove on the side facing the light guide plate that is opposite to the connecting part, and the connecting part has wiring in the wiring groove.

[0023] Optionally, the base plate has at least one protruding reinforcing rib on the side opposite to the light guide plate.

[0024] Optionally, the orthographic projection of the wiring groove on the light guide plate is located within the orthographic projection of the reinforcing rib on the light guide plate.

[0025] Optionally, one edge of the light guide plate is bonded to the flexible circuit board via a second adhesive portion.

[0026] Optionally, it also includes an optical film material located on the side of the light guide plate opposite to the base plate;

[0027] The light guide plate has a light-emitting area and a non-light-emitting area surrounding the light-emitting area;

[0028] The optical film includes a central region and a plurality of edges surrounding the central region. The orthographic projection of the central region of the optical film onto the light guide plate covers the light-emitting area. One edge of the optical film is connected to the non-light-emitting area of ​​the light guide plate.

[0029] Optionally, it also includes a light-shielding part, which is located on the side of the optical film away from the light guide plate, and the orthographic projection of the light-shielding part on the light guide plate covers the non-light-emitting area;

[0030] The first edge of the optical film is connected to the light guide plate through the light-shielding part.

[0031] Optionally, the light-shielding part includes light-shielding tape and a insulating pad;

[0032] The light-shielding tape is located on the side of the isolation pad opposite to the light guide plate, and the orthographic projection of the light-shielding tape on the light guide plate covers the non-light-emitting area and the orthographic projection of the isolation pad on the light guide plate.

[0033] The isolation pad is non-adhesive, and its orthographic projection onto the optical film covers all edges of the optical film except for the first edge.

[0034] Optionally, the isolation pad is black.

[0035] Optionally, the optical film material includes a diffuser sheet and two prism sheets stacked on the light guide plate;

[0036] Of the two prism sheets, one prism sheet has a microprism structure extending along a first direction, and the other prism sheet has a microprism structure extending along a second direction, which is perpendicular to the first direction.

[0037] The prism sheet has a light-blocking portion near the edge of the lamp strip, which is used to block the light emitted from the light source on the lamp strip from propagating along the extension direction of the microprism structure.

[0038] The light-blocking part's orthogonal projection onto the optical film covers the light-blocking part.

[0039] Optionally, the light-blocking portion includes at least one indentation, the extension direction of which intersects both the first direction and the second direction.

[0040] Optionally, the light-blocking portion includes two indentations, one of which is located on the side of the prism sheet facing the light guide plate, and the other is located on the side of the prism sheet away from the light guide plate, and the orthographic projections of the two indentations on the light guide plate do not coincide and do not intersect.

[0041] Optionally, it also includes a reflective sheet located between the light guide plate and the flexible circuit board;

[0042] One edge of the reflector is bonded to the base plate.

[0043] Optionally, it also includes at least one camera hole, which penetrates the base plate and the light guide plate, and the camera hole is disposed adjacent to at least one of the light strip portions;

[0044] The light source is not provided in the area of ​​the light strip portion adjacent to the camera hole and opposite to the camera hole.

[0045] Optionally, the light strip portion adjacent to the camera hole includes a first sub-light strip portion and a second sub-light strip portion;

[0046] The distance between the first sub-light strip and the second sub-light strip is a first distance, which is greater than the length of the camera hole along a third direction, where the third direction is the extension direction of the light strip adjacent to the camera hole.

[0047] This application also provides a display module, including any of the backlight modules provided in the above technical solutions.

[0048] This application also provides a display device, including the display module provided in the above technical solution.

[0049] This application provides a backlight module, a display module, and a display device. The backlight module includes a backplate, a light guide plate, and a light-emitting element. The light guide plate and the light-emitting element are located within the accommodating space of the backplate. The light-emitting element includes a flexible circuit board and multiple light sources. The flexible circuit board is located between the light guide plate and the bottom plate of the backplate. Since the flexible circuit board includes at least two lamp strips, which are respectively arranged adjacent to side plates located on different sides, and multiple light sources are arranged on the side of the at least two lamp strips away from the bottom plate, and the light sources are located between the side plates of the light guide plate and the side plates of the backplate, the flexible circuit board can provide light emission signals for the multiple light sources. The light-emitting element with at least two lamp strips can provide light sources for at least both sides of the light guide plate. Compared with the single lamp strip technology in the backlight module of the related art, the light output brightness of the backlight module can be significantly improved, thereby significantly improving the display brightness of the liquid crystal display module. Attached Figure Description

[0050] Figure 1 is a cross-sectional view of a liquid crystal display module in the related technology;

[0051] Figure 2 is a planar schematic diagram of a backlight module provided in an embodiment of this application;

[0052] Figure 3 is a cross-sectional view along CC' in Figure 2;

[0053] Figure 4 is a schematic diagram of a flexible circuit board provided in an embodiment of this application;

[0054] Figure 5 is a schematic diagram of the assembly of a backplane and a flexible circuit board according to an embodiment of this application;

[0055] Figure 6 is a schematic diagram of another flexible circuit board provided in an embodiment of this application;

[0056] Figure 7 is an enlarged view of region E in Figure 3;

[0057] Figure 8 is a cross-sectional view along GG' in Figure 2;

[0058] Figure 9 is a schematic diagram of another assembly of a backplane and a flexible circuit board provided in an embodiment of this application;

[0059] Figure 10 is a schematic diagram of another assembly of a backplane and a flexible circuit board provided in an embodiment of this application;

[0060] Figure 11 is a cross-sectional view along DD' in Figure 2;

[0061] Figure 12 is an enlarged view of region F in Figure 3;

[0062] Figure 13 is a schematic diagram of a light-shielding part provided in an embodiment of this application;

[0063] Figure 14 is a schematic diagram of the whole isolation pad provided in the embodiment of this application;

[0064] Figure 15 is a schematic diagram of the composite structure of a whole-piece isolation pad and a light-shielding tape provided in an embodiment of this application;

[0065] Figure 16 is a schematic diagram of a light-shielding part provided in an embodiment of this application;

[0066] Figure 17 is a schematic diagram of a prism sheet provided in an embodiment of this application;

[0067] Figure 18 is an enlarged view of region F in Figure 3;

[0068] Figure 19 is a schematic diagram of the fabrication of a prism sheet according to an embodiment of this application;

[0069] Figure 20 is a schematic diagram of a backlight module provided in an embodiment of this application;

[0070] Figure 21 is a schematic diagram of the structure of a display module provided in an embodiment of this application;

[0071] Figure 22 is an enlarged view of region M in Figure 21.

[0072] Icons: 01-Backlight module; 011-Back panel; 012-Light guide plate; 013-LED strip; 0131-Light source; 014-Reflective sheet; 015-Optical film; 016-Light-shielding tape; 02-LCD panel; 016-Lower polarizer; 1-Back panel; 11-Bottom plate; 111-Wiring channel; 112-Reinforcing rib; 12-Side panel; 121-First side panel; 122-Second side panel; 2-Light guide plate; 3-Light-emitting component; 31-Flexible circuit board; 311-Light strip section; 3111-First light strip section; 3112-Second light strip section; a-First sub-light strip section; b-Second sub-light strip section; 312-Connecting part; 32-Light source; 41-First tape; 42-Second tape; 43-Third tape; 44-Fourth tape; 45-Fifth tape; 5-Reflective sheet; 6-Optical film; 61-Diffuser sheet; 62-Prism sheet; 621-Lower prism sheet; 622-Upper prism sheet; 7-Light-shielding part; 71-Light-shielding tape; 72-Isolation pad; 8-Frame; 9-Edge tape; 601-Dent; O-Camera hole; 100-Backlight module; 200-LCD display panel; 300-Cover plate; 400-Mold. Detailed Implementation

[0073] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0074] In related technologies, a cross-sectional view and a partial enlarged view of a liquid crystal display module are shown in Figure 1. Specifically, the liquid crystal display module includes a backlight module 01 and a liquid crystal display panel 02 located on the light-emitting side of the backlight module 01. The backlight module 01 includes a back plate 011, a light guide plate 012, a lamp strip 013, a reflective sheet 014, an optical film 015, and a light-shielding tape 016, etc. In Figure 1, the bottom of the liquid crystal display module has a lamp strip 013 (as shown in the enlarged view of region A in Figure 1), and the top of the liquid crystal display module does not have a lamp strip (as shown in the enlarged view of region B in Figure 1).

[0075] To improve the brightness of LCD modules, conventional solutions include increasing the number of light-emitting diodes (LEDs) 0131 on the LED strip 013, increasing the current applied to the LEDs, or using high-brightness optical films. For example, increasing the number of LEDs on a single LED strip from 16 to 18 results in a brightness gain of 12.5%; increasing the current applied to the LEDs from 20mA to 21mA results in a brightness gain of 5%; and replacing ordinary optical films with high-brightness optical films results in a brightness gain of 5% to 10%. However, the current maximum brightness of LCD modules is only 800 nits, which is significantly lower than the brightness of organic electroluminescent display modules (OLEDs) exceeding 1500 nits. Simply increasing the number of LEDs on a single LED strip, increasing the current applied to the LEDs, or using high-brightness optical films provides only a very limited increase in brightness for LCD modules, making it impossible to match the brightness of OLEDs.

[0076] To address the aforementioned technical problems, this application provides a backlight module, as shown in Figures 2 and 3. Figure 2 is a planar schematic diagram of a backlight module provided in this application embodiment; Figure 3 is a cross-sectional view along CC' in Figure 2, wherein the enlarged view of region E is a structural schematic diagram of the top of the backlight module, and the enlarged view of region F is a structural schematic diagram of the bottom of the backlight module; the backlight module 100 includes:

[0077] The back panel 1 includes a bottom panel 11 and a plurality of side panels 12 connected to the edge of the bottom panel 11. The plurality of side panels 12 cooperate with the bottom panel 11 to form an accommodating space.

[0078] The light guide plate 2 is located within the accommodating space, and there is a gap between the side of the light guide plate 2 and the side plate 12.

[0079] The light-emitting element 3 is located within the accommodating space. The light-emitting element 3 includes a flexible circuit board 31 and multiple light sources 32.

[0080] The flexible circuit board 31 is located between the light guide plate 2 and the base plate 11. The flexible circuit board 31 includes at least two light strip portions 311 and a connecting portion 312. The at least two light strip portions 311 are respectively disposed adjacent to the side plates 12 located on different sides, and the extending direction of the light strip portions 311 is the same as the extending direction of the adjacent side plates 12. The at least two light strip portions 311 are electrically connected through the connecting portion 312. As shown in FIG4, FIG4 is a structural schematic diagram of a flexible circuit board 31 provided in an embodiment of this application.

[0081] Multiple light sources 32 are disposed on the side of each light strip 311 away from the base plate 11, and the light sources 32 are located between the side of the light guide plate 2 and the side plate 12.

[0082] The backlight module provided in this application includes a back plate 1, a light guide plate 2, and a light-emitting element 3. The light guide plate 2 and the light-emitting element 3 are located within the accommodating space of the back plate 1. The light-emitting element 3 includes a flexible circuit board 31 and multiple light sources 32. The flexible circuit board 31 is located between the light guide plate 2 and the bottom plate 11 of the back plate 1. Since the flexible circuit board 31 includes at least two lamp strips 311, which are respectively arranged adjacent to the side plates 12 located on different sides, and the multiple light sources 32 are arranged on the side of each lamp strip 311 away from the bottom plate 11, and the light sources 32 are located between the side plate 12 of the light guide plate 2 and the side plate 12 of the back plate 1, the flexible circuit board 31 can provide light emission signals for the multiple light sources 32. The light-emitting element 3 is provided with at least two lamp strips 311, which can provide light sources 32 for at least both sides of the light guide plate 2. Compared with the single lamp strip technical solution in the backlight module in the related art, the light output brightness of the backlight module can be greatly improved, thereby greatly improving the display brightness of the liquid crystal display module.

[0083] Specifically, the aforementioned backlight module can be combined with a liquid crystal display panel located on the light-emitting side of the backlight module to form a liquid crystal display module, which can be applied to display devices such as mobile phones, tablets, and laptops.

[0084] In this embodiment of the application, the bottom plate 11 of the back plate 1 can be rectangular in shape. The back plate 1 can include four side plates 12 connected to the edges of the bottom plate 11. The four side plates 12 and the bottom plate 11 cooperate to form an accommodating space, as shown in Figure 5. Figure 5 is an assembly diagram of a back plate 1 and a flexible circuit board 31 provided in this embodiment of the application. The light guide plate 2 is disposed in the accommodating space, and there are gaps between the four sides of the light guide plate 2 and the four sides of the back plate 1.

[0085] Optionally, in the backlight module, the shape of the base plate 11 can also be other polygons, and the number of side plates 12 of the back plate 1 is equal to the number of sides of the base plate 11. There is no restriction here, and it depends on the actual situation.

[0086] In this embodiment, the flexible circuit board 31 may have two light strip sections 311, which may be respectively arranged adjacent to two different side plates 12, as shown in Figures 4 and 5. This can significantly improve or double the light output brightness of the backlight module, thereby improving the display brightness of the liquid crystal display module.

[0087] As shown in Figure 5, the back plate 1 may include a plurality of side plates 12, including a first side plate 121 and a second side plate 122 disposed opposite to each other; the flexible circuit board 31 includes a first light strip portion 3111 and a second light strip portion 3112, the first light strip portion 3111 may be disposed adjacent to the first side plate 121, and the second light strip portion 3112 may be disposed adjacent to the second side plate 122; the connecting portion 312 is connected between the first light strip portion 3111 and the second light strip portion 3112.

[0088] Specifically, the first side plate 121 can be located at the top of the backlight module; the second side plate 122 can be located at the bottom of the backlight module. The first lamp strip portion 3111 and the second lamp strip portion 3112 in the flexible circuit board 31 are respectively arranged adjacent to the first side plate 121 and the second side plate 122, as shown in Figure 5. Compared with related technologies, this is equivalent to adding a lamp strip to the top of the backlight module, which can significantly improve the light output brightness of the backlight module.

[0089] Furthermore, when the first lamp strip portion 3111 and the second lamp strip portion 3112 of the flexible circuit board 31 are located at the top and bottom of the backlight module respectively, the assembly structure of the left and right sides of the backlight module will not be changed, thus ensuring that the narrow bezel design of the left and right sides of the display device is not affected.

[0090] It should be noted that the top of the backlight module specifically refers to the area at the top of the display device when the display device is in normal use; the bottom of the backlight module specifically refers to the area at the bottom of the display device when the display device is in normal use; and the left and right sides of the backlight module specifically refer to the areas on the left and right sides of the display device when the display device is in normal use.

[0091] Furthermore, as shown in Figure 5, since there is a certain distance between the first light strip portion 3111 and the second light strip portion 3112 of the flexible circuit board 31, when the light source 32 provided on the first light strip portion 3111 and the second light strip portion 3112 is working, the heat on the flexible circuit board 31 can be prevented from concentrating, thereby ensuring the heat dissipation effect of the flexible circuit board 31 and basically not affecting the heat dissipation of the backlight module. Moreover, since the flexible circuit board 31 is located between the light guide plate 2 and the bottom plate 11 of the back plate 1, it does not affect the light output effect of the backlight module. Compared with the linear light strip in the related technology, the area of ​​the flexible circuit board 31 can be increased, thereby increasing the heat conduction area and accelerating the heat dissipation speed of the flexible circuit board 31.

[0092] In this embodiment, as shown in Figures 4 and 5, the flexible circuit board 31 can be H-shaped, meaning the middle area of ​​the first light strip portion 3111 and the middle area of ​​the second light strip portion 3112 are connected by a straight connecting portion 312 to achieve electrical connection between the first light strip portion 3111 and the second light strip portion 3112. The H-shaped flexible circuit board 31 structure design allows for a larger area compared to the linear flexible circuit board 31 (FPC) in conventional light strips, thereby increasing the heat conduction area. For example, in a practical application, the area of ​​a linear light strip in related technologies can be approximately 130 mm², while the area of ​​the H-shaped flexible circuit board 31 in this embodiment can be approximately 540 mm².

[0093] Optionally, the flexible circuit board 31 can also be in other shapes, which are not limited here and depend on the actual situation. For example, the ends of the first light strip portion 3111 and the second light strip portion 3112 are connected by the connecting portion 312 to realize the electrical connection between the first light strip portion 3111 and the second light strip portion 3112, as shown in FIG6. FIG6 is a schematic diagram of the structure of a flexible circuit board 31 provided in an embodiment of this application.

[0094] Specifically, the flexible circuit board 31 also includes a connector, as shown in Figures 4, 5, and 6. The flexible circuit board 31 can be connected to the control module of the display device through the connector, and the control module can provide a light emission signal to the light source 32 on the flexible circuit board 31. The connector can be connected to a light strip section 311, for example, as shown in Figures 4, 5, and 6, the connector can be connected to a second light strip section 3112.

[0095] In this embodiment of the application, during the process of assembling the light-emitting element 3 onto the back plate 1, the flexible circuit board 31 of the light-emitting element 3 can be bonded to the base plate 11 through the first adhesive part to ensure the fixation of the light-emitting element 3.

[0096] Specifically, the first adhesive portion may include a first adhesive tape 41 and a second adhesive tape 42, as shown in Figure 7, which is an enlarged view of region E in Figure 3. In the flexible circuit board 31, one light strip portion 311 is bonded to the base plate 11 via the first adhesive tape 41, and the connecting portion 312 is bonded to the base plate 11 via the second adhesive tape 42. The flexible circuit board 31 expands and contracts with temperature changes. By bonding only one light strip portion 311 and the connecting portion 312 to the base plate 11, and leaving other areas unbonded, the flexible circuit board 31 can remain stretched during thermal expansion and contraction, avoiding wrinkles and ensuring the flatness of the components in the backlight module.

[0097] The first tape 41 and the second tape 42 are both double-sided tapes. In order to ensure the fixation of the light-emitting element 3, the thickness of the first tape 41 and the thickness of the second tape 42 can be different. The thickness of the first tape 41 is greater than the thickness of the second tape 42, which can ensure that the light strip part 311 is fixedly connected to the base plate 11.

[0098] Specifically, as shown in Figures 3 and 7, the first LED strip portion 3111 in the flexible circuit board 31 can be bonded to the base plate 11 via the first adhesive tape 41, that is, the LED strip portion 311 located at the top of the backlight module of the flexible circuit board 31 is fixedly bonded to the base plate 11. Optionally, other LED strip portions 311 in the flexible circuit board 31 can also be bonded to the base plate 11 via the first adhesive tape 41; this is not limited here and depends on the actual situation.

[0099] Optionally, the first adhesive part may only have the first adhesive tape 41, with only one light strip 311 bonded to the base plate 11 via the first adhesive tape 41. This allows the flexible circuit board 31 to remain stretched within the back plate 1, ensuring the flatness of the components in the backlight module. The specific structure of the first adhesive part is not limited here and can be determined according to the actual situation.

[0100] As shown in Figure 1, in the related technology, the light strip 031 is attached to the light guide plate 012 and the frame 017 using a light strip adhesive based on ordinary plastic (PET) substrate. The light strip adhesive and the light guide plate 012 are both made of plastic. The thermal conductivity of plastic material is 0.15~0.24W / mK, which has low thermal conductivity and poor heat conduction effect, which can easily lead to poor heat dissipation effect of the backlight module when the LED is emitting light.

[0101] To address the issue of low thermal conductivity in plastic LED strip adhesive, in this embodiment, the material of the first adhesive portion can be a high thermal conductivity material. Specifically, the thermal conductivity of the first adhesive portion can be greater than or equal to 0.6 W / mK. A high thermal conductivity enhances the heat dissipation effect of the backlight module. When the light source 32 on the LED strip portion 311 of the flexible circuit board 31 emits light, the heat from the light source 32 is transferred to the back plate 1 via the flexible circuit board 31 and the first adhesive portion. The back plate 1 is made of a thermally conductive metal, and its large heat dissipation area allows for rapid transfer of localized heat from the area where the light source 32 is located on the flexible circuit board 31 to the backlight module via radiation or conduction.

[0102] Specifically, the material of the first adhesive part can be a high thermal conductivity tape with glass fiber as the base material. Optionally, the first adhesive part can also be made of other materials with high thermal conductivity, which is not limited here and depends on the actual situation.

[0103] In this embodiment, to better assemble the light-emitting element 3 onto the back plate 1, the side of the back plate 1 facing the light guide plate 2 may have a wiring groove 111 opposite to the connection portion 312 of the flexible circuit board 31. The connection portion 312 can run wires within the wiring groove 111, as shown in FIG8. FIG8 is a cross-sectional view along GG' in FIG3, where the enlarged view of region J is a structural schematic diagram of the wiring groove 111 on the base plate 11. When assembling the light-emitting element 3 onto the back plate 1, the connection portion 312 of the flexible circuit board 31 can be aligned with the wiring groove 111, improving the assembly efficiency of the backlight module; furthermore, the wiring groove 111 on the base plate 11 can avoid the connection portion 312 from affecting the assembly of other components of the backlight module.

[0104] Specifically, as shown in Figure 8, when the base plate 11 has a wiring groove 111, the second adhesive tape 42 in the first adhesive part can be pasted to the bottom of the wiring groove 111, and the connecting part 312 of the flexible circuit board 31 runs in the wiring groove 111.

[0105] In practical applications, the size of mobile phone modules is constantly increasing, for example, from 5.0 inches to 6.8 inches. Correspondingly, the size of the backplate in the backlight module is also increasing. A conventional backplate can be made of stainless steel plate with a thickness of about 0.1mm. The bottom surface of the backplate is designed as a flat surface. The larger the flat area of ​​the backplate, the greater the warping of the backplate 1, which will lead to an increase in the defect rate of the backlight module. The flatness tolerance of a conventional backplate module is about +0.05 / -0.25mm.

[0106] In this embodiment of the application, the side of the base plate 11 away from the light guide plate 2 may have at least one protruding reinforcing rib 112, as shown in Figure 8. The reinforcing rib 112 can improve the overall strength of the back plate 1, improve the flatness of the back plate 1, and has a simple structure that is easy to manufacture without changing the material of the back plate 1 or increasing the manufacturing cost of the back plate 1.

[0107] It should be noted that the height, width, and shape of the reinforcing rib 112 are not limited here and can be determined according to the actual situation. For example, the height of the reinforcing rib 112 can be about 0.14mm, and the width of the reinforcing rib 112 can be about 2.74mm. The back plate 1 with the reinforcing rib 112 can control the flatness tolerance of the backlight module to about +0.05mm / -0.1mm.

[0108] Specifically, the extension direction of the reinforcing rib 112 can be the arrangement direction of the top and bottom of the backlight module. In order to further improve the overall strength of the back plate 1, the reinforcing rib 112 on the bottom plate 11 can be set as two or more, and the reinforcing rib 112 can also be designed as a non-linear shape, for example, the orthogonal projection of the reinforcing rib 112 on the bottom plate 11 is stepped.

[0109] In this embodiment, the orthographic projection of the wiring groove 111 on the light guide plate 2 can be located within the orthographic projection of the reinforcing rib 112 on the light guide plate 2, which can avoid the design of the wiring groove 111 from affecting the overall strength of the back plate 1.

[0110] Specifically, the structure of the back plate 1 can be formed by stamping a metal sheet. The thickness of the back plate 1 can be about 0.1 mm, or it can be other thicknesses, which are not limited here and depend on the actual situation. The reinforcing ribs 112 on the base plate 11 are also formed by stamping. This allows wiring grooves 111 to be formed on the side of the base plate 11 facing the light guide plate 2, and reinforcing ribs 112 to be formed on the side of the base plate 11 away from the light guide plate 2.

[0111] As shown in Figures 9 and 10, these figures are schematic diagrams of the assembly structure of the flexible circuit board 31 and the back plate 1 provided in the embodiments of this application. As shown in Figure 9, the base plate 11 of the back plate 1 may have two reinforcing ribs 112, that is, two wiring grooves 111 on the corresponding base plate 11, which can improve the overall strength and flatness of the back plate 1. The connecting part 312 of the flexible circuit board 31 can be routed within one wiring groove 111. As shown in Figure 10, the orthogonal projection of the reinforcing rib 112 on the base plate 11 of the back plate 1 is stepped, and the reinforcing rib 112 is a non-linear design, that is, a non-linear wiring groove 111 on the corresponding base plate 11, which can improve the overall strength and flatness of the back plate 1. The connecting part 312 of the flexible circuit board 31 can be routed within the non-linear wiring groove 111.

[0112] In this embodiment, during the assembly of the light guide plate 2 and the light-emitting element 3, one edge of the light guide plate 2 can be bonded to the flexible circuit board 31 through the second adhesive part; the light guide plate 2 will expand and contract during temperature changes, and only one edge of the light guide plate 2 is bonded to the flexible circuit board 31, which can ensure that the light guide plate 2 remains stretched during the expansion and contraction process and avoid the problem of wrinkles in the light guide plate 2.

[0113] Specifically, the edge of the light guide plate 2 adjacent to the first side plate 121 can be bonded to the flexible circuit board 31 through the second adhesive part. That is, the edge of the light guide plate 2 located at the top of the backlight module is fixedly bonded to the flexible circuit board 31, as shown in Figure 11. Figure 11 is a cross-sectional view along DD' in Figure 3, where the enlarged view of region H is a structural schematic diagram of the top of the backlight module. Optionally, the edge of the light guide plate 2 adjacent to other side plates 12 can also be designed to be bonded to the flexible circuit board 31. This is not limited here and depends on the actual situation.

[0114] The second adhesive part can be a third tape 43, which is a double-sided tape.

[0115] In this embodiment, the backlight module further includes a reflective sheet 5, which is located between the light guide plate 2 and the flexible circuit board 31, as shown in Figures 3, 7, and 11. The reflective sheet 5 can completely reflect the light irradiated from the light guide plate 2 toward the base plate 11, thereby enhancing the light output brightness of the backlight module. As shown in Figure 11, one edge of the reflective sheet 5 can be bonded to the base plate 11 through a third adhesive part. The reflective sheet 5 will expand and contract during temperature changes. Since only one edge of the reflective sheet 5 is bonded to the base plate 11, it can ensure that the reflective sheet 5 remains stretched during the expansion and contraction process, avoiding the problem of wrinkles in the reflective sheet 5.

[0116] Specifically, the edge of the reflective sheet 5 adjacent to the first side plate 121 can be bonded to the base plate 11, that is, the edge of the reflective sheet 5 located at the top of the backlight module is fixedly bonded to the base plate 11, as shown in Figure 11. Optionally, the edges of the reflective sheet 5 adjacent to other side plates 12 can also be designed to be bonded to the base plate 11. There are no restrictions on this, and it depends on the actual situation.

[0117] The third adhesive part can be a fourth tape 44, which is a double-sided tape.

[0118] In this embodiment, the backlight module further includes an optical film 6, which is located on the side of the light guide plate 2 away from the base plate 11, as shown in Figures 7 and 12. Figure 12 is an enlarged view of region F in Figure 3. The light guide plate 2 has a light-emitting area and a non-light-emitting area surrounding it. The optical film 6 includes a central area and multiple edges surrounding the central area. The orthographic projection of the central area of ​​the optical film 6 onto the light guide plate 2 covers the light-emitting area. One edge of the optical film 6 can connect to the non-light-emitting area of ​​the light guide plate 2. The optical film 6 expands and contracts with temperature changes. Since only one edge of the optical film 6 is connected to the light guide plate 2, it ensures that the optical film 6 remains stretched during thermal expansion and contraction, avoiding wrinkles.

[0119] Specifically, the edge of the optical film 6 near the first side plate 121 can be connected to the light guide plate 2, that is, the edge of the optical film 6 at the top of the backlight module is connected to the light guide plate 2; alternatively, the edge of the optical film 6 near other side plates 12 can also be designed to be connected to the light guide plate 2, which is not limited here and depends on the actual situation.

[0120] In this embodiment, the backlight module further includes a light-shielding part 7. The light-shielding part 7 is located on the side of the optical film 6 opposite to the light guide plate 2, and the orthogonal projection of the light-shielding part 7 on the light guide plate 2 covers the non-light-emitting area. The first edge of the optical film 6 can be connected to the light guide plate 2 through the light-shielding part 7, as shown in Figures 7 and 12. The light-shielding part 7 can block the light from the non-light-emitting area of ​​the light guide plate 2, prevent light leakage at the edge of the display device, and ensure the display effect of the display device.

[0121] Specifically, the first edge of the optical film 6 can be the edge of the first side plate 121 of the optical film 6 adjacent to the back plate 1. The first edge of the optical film 6 is connected to the light guide plate 2 through the light shielding part 7, which can ensure the smoothness of the optical film 6 and avoid the problem of wrinkles in the optical film 6.

[0122] In related technologies, as shown in Figure 1, in the backlight module 01, a light-shielding tape 016 is used to shield the non-light-emitting area of ​​the light guide plate 012. The light-shielding tape 016 can be double-sided tape. The light-shielding tape 016 is attached to the side of the optical film 015 away from the light guide plate 012. One side of the light-shielding tape 016 will cause the four edges of the optical film 015 to adhere to the non-light-emitting area of ​​the light guide plate 012, making it impossible to connect only one edge of the optical film 015 to the light guide plate 012. The optical film 015 cannot stretch freely; and the other side of the light-shielding tape 016 will adhere to the lower polarizer 021 located on the light-incident side of the liquid crystal display panel 02; and due to the different shrinkage ratios of the lower polarizer 021 and the optical film 015, coupled with the changes in temperature and humidity during environmental testing causing the lower polarizer 021 and the optical film 015 to produce different amounts of expansion and contraction, the shrinkage of the lower polarizer 021 will cause the light-shielding tape 016 to bind the optical film 015, resulting in poor wrinkling of the optical film 015.

[0123] To address the aforementioned issues, in this embodiment, the light-shielding portion 7 may include a light-shielding tape 71 and an isolation pad 72, as shown in Figures 7, 12, and 13. Figure 13 is a schematic diagram of the structure of a light-shielding portion 7 provided in this embodiment. The light-shielding tape 71 is located on the side of the isolation pad 72 facing away from the light guide plate 2. The orthographic projection of the light-shielding tape 71 on the light guide plate 2 covers the non-light-emitting area and the orthographic projection of the isolation pad 72 on the light guide plate 2. The isolation pad 72 is non-adhesive, and the orthographic projection of the isolation pad 72 on the optical film 6 covers all edges of the optical film 6 except for the first edge.

[0124] In the aforementioned light-shielding part 7, since there is an isolation pad 72 between the light-shielding tape 71 and the optical film material 6, the isolation pad 72 covers the edges of the optical film material 6 except for the first edge. The light-shielding tape 71 is a double-sided tape, and the isolation pad 72 is not adhesive. One side of the isolation pad 72 is in contact with the optical film material 6, while the other side is bonded to the light-shielding tape 71. This allows the light-shielding tape 71 to bond only to the first edge of the optical film material 6 and the light guide plate 2, without bonding to the other edges of the optical film material 6. Consequently, the optical film material 6 can be connected to the light guide plate 2 only at its first edge through the light-shielding part 7. Therefore, during environmental testing, the optical film material 6 can stretch freely without wrinkling caused by the light-shielding tape 71 binding the optical film material 6 due to the shrinkage of the lower polarizer.

[0125] Specifically, the material of the aforementioned isolation pad 72 can be plastic material (PET) or other materials, without restriction, depending on the actual situation.

[0126] The isolation pad 72 can be black to ensure the light-blocking effect of the light-blocking part 7.

[0127] Specifically, the manufacturing process of the light-shielding part 7 can be as follows: First, cut out a whole piece of isolation pad 72. The length of the isolation pad 72 is L1 and the width is W1. The actual cutting size accuracy can be accurate to within 0.05mm, as shown in Figure 14. Second, attach the whole piece of isolation pad 72 to the whole piece of light-shielding tape 71 to form a composite material of isolation pad 72 and light-shielding tape 71, as shown in Figure 15. Then, based on the outer contour of the isolation pad 72, cut out the outer contour of the light-shielding tape 71. The length of the light-shielding tape 71 is L2 and the width is W2. L2 is greater than L1 and W2 is greater than W1. Finally, based on the outer contour of the isolation pad 72, punch out a light-emitting hole in the composite material. The light-emitting hole is opposite to the light-emitting area of ​​the light guide plate 2. The length of the light-emitting hole is L3 and the width is W3. L3 is less than L1 and W3 is less than W1, as shown in Figure 16. Figure 16 is a structural schematic diagram of a light-shielding part 7 provided in an embodiment of this application.

[0128] For example, L1 = 157.47mm, W1 = 69.17mm, L2 = 161.87mm, W2 = 70.55mm, L3 = 156.67mm, and W3 = 68.65mm. In practical applications, the actual manufacturing precision of L1, W1, L2, W2, L3, and W3 can be controlled within + / -0.05mm to meet the assembly requirements of optical film material 6.

[0129] In this embodiment, the optical film 6 may include a diffuser sheet 61 and two prism sheets 62 sequentially stacked on the light guide plate 2; the two prism sheets 62 include a lower prism sheet 621 and an upper prism sheet 622 stacked on top of each other. The diffuser sheet 61 enables uniform light output from the backlight module, and the prism sheets 62 enhance the light output brightness of the backlight module.

[0130] To achieve the connection between the first edge of the optical film 6 and the light guide plate 2, as shown in Figures 7 and 12, the isolation pad 72 isolates the edges of the diffuser 61, the lower prism sheet 621, and the upper prism sheet 622 (excluding the first edge) from the light-shielding tape 71. The first edge of the diffuser 61 can extend from below the two prism sheets 62, so that the first edge of the diffuser 61 is bonded to the light-shielding tape 71 through the fourth adhesive part. The first edge of the upper prism sheet 622 is directly bonded to the light-shielding tape 71, and both ends of the first edge of the lower prism sheet 621 are bonded to the light-shielding tape 71. The light-shielding tape 71 is bonded to the non-light-emitting area of ​​the light guide plate 2, thereby achieving the fixation of the optical film 6 by the light-shielding tape 71.

[0131] The fourth adhesive part can be a fifth tape 45, which is a double-sided tape.

[0132] In the aforementioned optical film material 6, since the upper prism 622 is closest to the light-shielding tape 71, if the light-shielding tape 71 is bonded to all edges of the upper prism 622, the shrinkage of the light-shielding tape 71 is most likely to cause wrinkles in the upper prism 622. In this embodiment, since the light-shielding part 7 is provided with an isolation pad 72, the light-shielding tape 71 can only be bonded to the first edge of the upper prism 622. During environmental testing, the upper prism 622 can stretch freely and will not be wrinkled due to the shrinkage of the lower polarizer causing the light-shielding tape 71 to bind the upper prism 622.

[0133] Specifically, in the two prism sheets 62 of the optical film material 6, one prism sheet 62 has a microprism structure extending along a first direction, and the other prism sheet 62 has a microprism structure extending along a second direction, which is perpendicular to the first direction. The two prism sheets 62 can improve the light output brightness of the backlight module through the microprism structure.

[0134] In the backlight module, since the light source 32 set on the flexible circuit board 31 is located between the light guide plate 2 and the side plate 12, the light emitted by the light source 32 will not only enter the light guide plate 2 from the side of the light guide plate 2, but may also be transmitted from the edge of the two prism sheets 62 along the extension direction of the microprism structure to the middle area of ​​the optical film 6. The middle area of ​​the optical film 6 is opposite to the display area of ​​the liquid crystal display panel, which may cause the edge of the display area of ​​the liquid crystal display panel to be bright.

[0135] To address this issue, in this embodiment, the edge of the prism sheet 62 near the lamp strip 311 may have a light-blocking portion. This light-blocking portion blocks the light emitted from the light source 32 on the lamp strip 311 from propagating along the extension direction of the microprism structure. The orthogonal projection of the light-blocking portion 7 onto the optical film 6 covers the light-blocking portion. The light-blocking portion can block the light emitted from the light source 32 from propagating along the microprism structure on the prism sheet 62 to the middle region of the optical film 6, thereby preventing the problem of bright edges on the display area of ​​the liquid crystal display panel.

[0136] Specifically, the light-blocking portion may include at least one indentation 601. The extension direction of the indentation 601 intersects both the first and second directions, as shown in FIG17, which is a schematic diagram of the structure of a prism sheet 62 provided in an embodiment of this application. As shown in FIG18, which is an enlarged view of region F in FIG3, the edge of the prism sheet 62 near the lamp strip portion 311 has an indentation 601. The indentation 601 can prevent the light emitted from the light source 32 (as shown by the straight line with arrows in FIG18) from the edge of the prism sheet 62 along the extension direction of the microprism structure to the middle region of the optical film material 6, thereby avoiding the problem of bright edges of the display area of ​​the liquid crystal display panel.

[0137] The light-blocking part may include one indentation 601, or two or more indentations 601. There is no limitation here, and it depends on the actual situation.

[0138] Specifically, the light-blocking part may include two indentations 601, one of which is located on the side of the prism sheet 62 facing the light guide plate 2, and the other is located on the side of the prism sheet 62 away from the light guide plate 2. The orthographic projections of the two indentations 601 on the light guide plate 2 do not coincide and do not intersect, as shown in Figures 17 and 18.

[0139] Because the prism sheet 62 is relatively thin, if a groove 601 is provided on the edge of the prism sheet 62 near the lamp strip 311, the groove 601 might need to be quite deep to effectively destroy the microprism structure. This could cause the edge of the prism sheet 62 to break, damaging the overall structure of the prism sheet 62. However, by providing grooves 601 on both sides of the edge of the prism sheet 62 near the lamp strip 311, and ensuring that the orthographic projections of the two grooves 601 on the light guide plate 2 do not overlap, the microprism structure at the edge of the prism sheet 62 can be effectively destroyed while reducing the depth of the grooves 601, thus preventing the prism sheet 62 from breaking.

[0140] Specifically, in the light-blocking part mentioned above, the two indentations 601 can be arranged in parallel or not in parallel. There is no restriction here, and it depends on the actual situation.

[0141] Specifically, the indentation 601 on the edge of the prism sheet 62 can be formed by die stamping. As shown in Figure 19, which is a schematic diagram of the manufacturing of a prism sheet 62 provided in an embodiment of this application, the prism sheet 62 needs to be cut by the die 400. The required indentation 601 can be pressed out on the edge of the prism sheet 62 simply by setting a strip-shaped protrusion at the corresponding position on the die 400, without adding any additional processes or cutting and stamping costs.

[0142] In this embodiment of the application, as shown in FIG7, the first edge of the diffuser 61 is bonded to the light-shielding tape 71 of the light-shielding part 7 by the fifth tape 45. The fifth tape 45 can be an opaque tape. The fifth tape 45 can block the light emitted by the light source 32 on the first light strip 3111 from shining on the first edge of the prism sheet 62. Therefore, the first edge of the prism sheet 62 does not need to be provided with a recess 601. However, the diffuser 61 does not have adhesive tape at the edge near the second light strip 3112. As shown in FIG18, the light emitted by the light source 32 on the second light strip 3112 will shine on the edge of the prism sheet 62. Therefore, the edge of the prism sheet 62 near the second light strip 3112 needs to have a recess 601 to prevent the light emitted by the light source 32 on the second light strip 3112 from propagating along the microprism structure to the middle area of ​​the optical film 6.

[0143] In this embodiment of the application, the backlight module may further include at least one camera hole O, the camera hole O penetrates the base plate 11 and the light guide plate 2, and the camera hole O is disposed near at least one light strip portion 311; the area of ​​the light strip portion 311 adjacent to the camera hole O and opposite to the camera hole O may not be provided with a light source 32, as shown in FIG20, FIG20 is a structural schematic diagram of a backlight module provided in this embodiment of the application.

[0144] Specifically, the camera hole O can penetrate the backlight module, that is, the camera hole O can penetrate the base plate 11, the reflector 5, the light guide plate 2, and the optical film 6. A camera can be installed inside the camera hole O. However, the light emitted from the light source 32 on the light strip 311 adjacent to the camera hole O cannot penetrate the camera inside the camera hole O and enter the light guide plate 2. Therefore, the area of ​​the light strip 311 adjacent to the camera hole O and opposite to the camera hole O does not need to be equipped with a light source 32. This reduces the number of light sources 32 while keeping the brightness of the backlight module unchanged. It also reduces the heat on the flexible circuit board 31 when the light source 32 is lit, which is beneficial for the heat dissipation of the flexible circuit board 31.

[0145] In this embodiment of the application, as shown in FIG20, the light strip portion 311 adjacent to the camera hole O may include a first sub-light strip portion a and a second sub-light strip portion b; the distance between the first sub-light strip portion a and the second sub-light strip portion b is a first distance P1, which is greater than the length P2 of the camera hole O along a third direction. The third direction is the extension direction of the light strip portion 311 adjacent to the camera hole O. This can reduce the number of light sources 32 on the light strip portion 311, thereby reducing the heat on the flexible circuit board 31 when the light source 32 emits light, which is beneficial to the heat dissipation of the flexible circuit board 31.

[0146] Specifically, as shown in Figure 20, the camera hole O can be set near the first light strip 3111. The area of ​​the first light strip 3111 opposite to the camera hole O can be without a light source 32, so that the first light strip 3111 can include a first sub-light strip a and a second sub-light strip b. The distance between the first sub-light strip a and the second sub-light strip b is a first distance P1. The first distance P1 can be greater than the length P2 of the camera hole O along the extension direction of the first light strip 3111, which can reduce the heat dissipated by the light source 32 on the first light strip 3111 when it is working, which is beneficial to the heat dissipation of the flexible circuit board 31.

[0147] Optionally, the light strip portion located near the camera hole O can also be any other light strip portion besides the first light strip portion 3111. There are no restrictions here, and it depends on the actual situation.

[0148] Specifically, as shown in Figure 20, the multiple light sources 32 on the first light strip 3111 are arranged along the extending direction of the first light strip 3111. The area of ​​the first light strip 3111 opposite to the camera hole O can be an empty area, where no light source 32 is provided, so that the multiple light sources 32 on the first light strip 3111 are arranged at non-equidistant intervals. For example, the two sides of the empty area on the first light strip 3111 are the first sub-light strip a and the second sub-light strip b, respectively. The multiple light sources 32 on the first sub-light strip a can be arranged at equal intervals, and the distance between the centers of two adjacent light sources 32 on the first sub-light strip a can be P1. The multiple light sources 32 on the second sub-light strip b are also arranged at equal intervals, and the distance between the centers of two adjacent light sources 32 on the second sub-light strip b can be P3. The distance between the centers of two light sources 32 on both sides of the empty area on the first light strip 3111 can be P4, where P4 is greater than P3.

[0149] Specifically, when the second light strip portion 3112 and the first light strip portion 3111 on the flexible circuit board 31 are arranged opposite each other, the multiple light sources 32 on the second light strip portion 3112 are arranged along the extending direction of the second light strip portion 3112. The multiple light sources 32 on the second light strip portion 3112 can be arranged at equal intervals, and the distance between the centers of two adjacent light sources 32 can be equal to P3 or not equal to P3. There is no restriction here, and it depends on the actual situation. Alternatively, the multiple light sources 32 on the second light strip portion 3112 can also be arranged at unequal intervals. There is no restriction here, and it depends on the actual situation.

[0150] In this embodiment of the application, as shown in FIG12, the backlight module further includes a frame 8, which can be fixedly connected to the inner side of the side plate 12. The frame 8 and the side of the multiple side plates 12 away from the bottom plate 11 can cooperate to form a support surface for supporting the liquid crystal display panel. The light-shielding part 7 can be located on the side of the support surface away from the bottom plate 11, and the edge of the light-shielding tape 71 of the light-shielding part 7 can be bonded to the support surface.

[0151] In this embodiment of the application, as shown in FIG7, the backlight module may further include an edge-binding tape 9, which overlaps with the outer edge of the light-shielding tape 71 and wraps around the outside of the back plate 1, thereby fixing the edge of the light-shielding tape 71.

[0152] The thickness of the edge-binding tape 9 can be approximately 0.03mm, or other thicknesses; there are no restrictions here, and it depends on the actual situation.

[0153] This application embodiment also provides a display module, including any one of the backlight modules 100 provided in the above technical solutions.

[0154] Specifically, the display module also includes a liquid crystal display panel 200, which is located on the light-emitting side of the backlight module 100, as shown in Figure 21. Figure 21 is a cross-sectional view of a display module provided in an embodiment of this application, wherein the enlarged view of region M is a structural schematic diagram of the top of the display module, and the enlarged view of region N is a structural schematic diagram of the bottom of the display module. The liquid crystal display panel 200 may include an array substrate, a color filter substrate, and a liquid crystal layer. The color filter substrate is located on the side of the array substrate facing away from the backlight module, and the liquid crystal layer is located between the array substrate and the color filter substrate. The side of the array substrate facing the backlight module has a lower polarizer, and the side of the color filter substrate facing away from the array substrate has an upper polarizer. The polarization direction of the upper polarizer is perpendicular to the polarization direction of the lower polarizer. The lower polarizer can be bonded to the light-shielding tape 71 in the backlight module.

[0155] The liquid crystal display panel has a display area AA and a non-display area BB surrounding the display area AA. The orthographic projection of the light-shielding part 7 on the liquid crystal display panel is located in the non-display area BB, as shown in Figure 22. Figure 22 is an enlarged view of region M in Figure 21.

[0156] Specifically, the display module may also include a cover plate 300 located on the side of the liquid crystal display panel 200 opposite to the backlight module.

[0157] Specifically, the top assembly structure of the display module can be as shown in Figure 22, which illustrates the gap design between the components at the top of the display module. Specifically, the distance between the light source 32 on the first lamp strip 3111 and the first side plate 121 is D1, which can be 0.3mm or other spacing depending on the actual situation; the width of the light source 32 is D2, which can be 0.5mm or other dimensions depending on the actual situation; the distance between the light source 32 on the first lamp strip 3111 and the first edge of the diffuser 61 is D3, which can be 0.15mm or other distance depending on the actual situation; the overlap width between the fifth tape 45 and the first edge of the diffuser 61 is D4. 4 can be 0.4mm or other sizes, depending on the actual situation; the distance between the fifth tape 45 and the prism sheet 62 is D5, which can be 0.2mm or other distances, depending on the actual situation; the distance between the first edge of the prism sheet 62 and the inner edge of the light-shielding tape 71 is D6, which can be 0.42mm or other distances, depending on the actual situation; the distance between the inner edge of the light-shielding tape 71 and the display area of ​​the liquid crystal display panel is D7, which can be 0.23mm or other distances, depending on the actual situation.

[0158] This application also provides a display device, including the display module provided in the above technical solution.

[0159] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A backlight module, wherein, include: The back panel includes a bottom plate and a plurality of side plates connected to the edge of the bottom plate, the plurality of side plates cooperating with the bottom plate to form an accommodating space; A light guide plate is located within the accommodating space, and there is a gap between the side of the light guide plate and the side plate; A light-emitting element is located within the accommodating space, and the light-emitting element includes a flexible circuit board and multiple light sources; The flexible circuit board is located between the light guide plate and the base plate. The flexible circuit board includes at least two light strips and a connecting portion. The at least two light strips are respectively disposed adjacent to the side plates located on different sides, and the extending direction of the light strip is the same as the extending direction of the adjacent side plate. The at least two light strips are electrically connected through the connecting portion. The plurality of light sources are disposed on the side of each of the light strips away from the base plate, and the light sources are located between the side of the light guide plate and the side plate.

2. The backlight module according to claim 1, wherein, The plurality of side plates includes a first side plate and a second side plate disposed opposite to each other; The flexible circuit board includes a first light strip portion and a second light strip portion, wherein the first light strip portion is disposed adjacent to the first side plate and the second light strip portion is disposed adjacent to the second side plate; The connecting part is connected between the first light strip part and the second light strip part.

3. The backlight module according to claim 2, wherein, The flexible circuit board is H-shaped.

4. The backlight module according to any one of claims 1 to 3, wherein, The flexible circuit board is bonded to the base plate via a first adhesive portion; The first adhesive portion includes a first adhesive tape and a second adhesive tape; One of the light strip portions is bonded to the base plate via the first adhesive tape; The connecting part is bonded to the base plate by the second adhesive tape.

5. The backlight module according to any one of claims 1 to 4, wherein, The back plate has a wiring groove on the side facing the light guide plate, which is opposite to the connecting part, and the connecting part runs wires in the wiring groove.

6. The backlight module according to claim 5, wherein, The base plate has at least one protruding reinforcing rib on the side opposite to the light guide plate.

7. The backlight module according to claim 6, wherein, The orthographic projection of the wiring groove on the light guide plate lies within the orthographic projection of the reinforcing rib on the light guide plate.

8. The backlight module according to any one of claims 1-7, wherein, One edge of the light guide plate is bonded to the flexible circuit board via a second adhesive portion.

9. The backlight module of any of claims 1-8, wherein, It also includes an optical film material located on the side of the light guide plate opposite to the base plate; The light guide plate has a light-emitting area and a non-light-emitting area surrounding the light-emitting area; The optical film includes a central region and a plurality of edges surrounding the central region. The orthographic projection of the central region of the optical film onto the light guide plate covers the light-emitting area. One edge of the optical film is connected to the non-light-emitting area of ​​the light guide plate.

10. The backlight module according to claim 9, wherein, It also includes a light-shielding part, which is located on the side of the optical film away from the light guide plate, and the orthographic projection of the light-shielding part on the light guide plate covers the non-light-emitting area; The first edge of the optical film is connected to the light guide plate through the light-shielding part.

11. The backlight module according to claim 10, wherein, The light-shielding part includes light-shielding tape and an insulating pad; The light-shielding tape is located on the side of the isolation pad opposite to the light guide plate, and the orthographic projection of the light-shielding tape on the light guide plate covers the non-light-emitting area and the orthographic projection of the isolation pad on the light guide plate. The isolation pad is non-adhesive, and its orthographic projection onto the optical film covers all edges of the optical film except for the first edge.

12. The backlight module according to claim 11, wherein, The isolation pad is black.

13. The backlight module according to any one of claims 10-12, wherein, The optical film material includes a diffuser sheet and two prism sheets stacked on the light guide plate; Of the two prism sheets, one prism sheet has a microprism structure extending along a first direction, and the other prism sheet has a microprism structure extending along a second direction, which is perpendicular to the first direction. The prism sheet has a light-blocking portion near the edge of the lamp strip, which is used to block the light emitted from the light source on the lamp strip from propagating along the extension direction of the microprism structure. The light-blocking part's orthogonal projection onto the optical film covers the light-blocking part.

14. The backlight module according to claim 13, wherein, The light-blocking portion includes at least one indentation, the extension direction of which intersects both the first direction and the second direction.

15. The backlight module according to claim 14, wherein, The light-blocking part includes two indentations, one of which is located on the side of the prism sheet facing the light guide plate, and the other is located on the side of the prism sheet away from the light guide plate. The orthographic projections of the two indentations on the light guide plate do not coincide and do not intersect.

16. The backlight module according to any one of claims 1-15, wherein, It also includes a reflective sheet, which is located between the light guide plate and the flexible circuit board; One edge of the reflector is bonded to the base plate.

17. The backlight module according to any one of claims 1-16, wherein, It also includes at least one camera hole, which penetrates the base plate and the light guide plate, and the camera hole is disposed adjacent to at least one of the light strip portions; The light source is not provided in the area of ​​the light strip near the camera hole that is opposite to the camera hole.

18. The backlight module according to claim 17, wherein, The light strip portion adjacent to the camera hole includes a first sub-light strip portion and a second sub-light strip portion; The distance between the first sub-light strip and the second sub-light strip is a first distance, which is greater than the length of the camera hole along a third direction, where the third direction is the extension direction of the light strip adjacent to the camera hole.

19. A display module, wherein, Includes the backlight module as described in any one of claims 1-18.

20. A display device, wherein, Includes the display module as described in claim 19.

Images