Backlight module and suspension assembly

Abstract

The application discloses a backlight module, which comprises a light guide plate, a first optical film and a hanging assembly. The light guide plate has a first side surface and a first light exit surface connected with each other. The first side surface has a groove. The first optical film is arranged correspondingly to the first light exit surface. The hanging assembly comprises a first hanging element. The first hanging element is arranged in the groove. The first hanging element has a first body part and a first tongue part. The first body part has a first part and a second part connected with each other. The first part is arranged in the groove, and the second part is bent relative to the first part. The first tongue part is erected on the second part and protrudes away from the second part. The first tongue part positions the first optical film. The application further provides a backlight module and a hanging assembly.

Description

TECHNICAL FIELD

[0001] The present invention relates to an assembly in a display device, and more particularly, to a backlight module and a suspension assembly suitable for the backlight module. BACKGROUND

[0002] A liquid crystal display device mainly includes a backlight module, a display panel, a frame and the like. According to the relative position of a light source and a light guide plate, the backlight module can be classified into a side light type backlight module and a direct type backlight module. Generally, the side light type backlight module has the advantages of thin thickness and low cost. On the other hand, the direct type backlight module has a better area dimming effect, so that the picture has a better contrast. In addition, the backlight module is usually provided with an optical film to further improve the image quality.

[0003] In the prior art, the optical film is usually fixed on a mechanism member near the light guide plate. However, since the volume of the light guide plate and the mechanism member will change to different degrees with temperature, the optical film is stretched or pressed, causing the optical film to be broken or wrinkled. SUMMARY

[0004] The present invention provides a backlight module and a suspension assembly to provide the advantage of easily maintaining the flatness of the optical film.

[0005] To achieve one or some or all of the above objects or other objects, the present invention provides a suspension assembly and a backlight module. The backlight module includes a light guide plate, a first optical film and the suspension assembly. The light guide plate has a first side surface and a first light exit surface connected to each other. The first side surface has a groove. The first optical film is disposed corresponding to the first light exit surface. The suspension assembly includes a first suspension member. The first suspension member has a first body portion and a first tongue portion. The first body portion has a first part and a second part connected to each other. The first part is disposed in the groove, and the second part is bent relative to the first part. The first tongue portion is erected on the second part and protrudes away from the second part. The first tongue portion positions the first optical film.

[0006] In an embodiment of the present invention, the backlight module further includes a second optical film. The light guide plate can further have a second light exit surface opposite to the first light exit surface, and the second optical film is disposed corresponding to the second light exit surface. The first suspension member can further have a second tongue portion. The first body portion can further have a third part. The third part is connected to a side of the first part opposite to the second part and is bent relative to the first part. The second tongue portion is erected on the third part and positions the second optical film.

[0007] In an embodiment of the present invention, the backlight module can further include a frame and a buffer member. The light guide plate is disposed in the frame, and the first part is located between the frame and the light guide plate. The buffer member is abutted between the first part and the frame.

[0008] In an embodiment of the present application, the first hanging element further has a positioning portion. The first portion has opposite first and second surfaces. The second portion is connected to the first surface, and the positioning portion is erected on the second surface.

[0009] In an embodiment of the present application, the backlight module further has a limiting member. The positioning portion is in the form of a sheet and has a positioning groove extending to a side of the positioning portion opposite to the second surface. The limiting member has a rod portion and a stop portion connected to each other. The rod portion is arranged in the positioning groove. The stop portion is opposite to the positioning portion and is adapted to stop the positioning portion from being folded relative to the first portion.

[0010] In an embodiment of the present application, the hanging assembly further has a second hanging element. The light guide plate further has a second side opposite to the first side. The second hanging element has a second body portion and a third tongue portion. The second body portion is arranged against the first light exit surface and close to the second side. The third tongue portion is erected on the second body portion and protrudes away from the second body portion. The third tongue portion positions the first optical film.

[0011] In an embodiment of the present application, the second hanging element further has a base portion. The base portion is connected to an end of the second body portion close to the second side and is folded relative to the second body portion.

[0012] To achieve one or some or all of the above objects or other objects, the present application provides a hanging assembly and a backlight module. The backlight module includes a light guide plate, a first optical film and the hanging assembly. The light guide plate has a side and a first light exit surface connected to each other. The side has a groove, and the groove has a first opening formed in the first light exit surface. The first optical film is arranged opposite to the first light exit surface. The hanging assembly includes a first hanging element having a first body portion and a first tongue portion. The first body portion is arranged in the groove. The first tongue portion is connected to the first body portion and extends away from the first body portion. The first tongue portion protrudes out of the first light exit surface through the first opening, and the first tongue portion positions the first optical film.

[0013] In an embodiment of the present application, the first body portion is in the form of a sheet and can have a first edge corresponding to the first opening. The first tongue portion has two first segments connected to opposite sides of the first edge.

[0014] In an embodiment of the present application, the backlight module further has a frame, and the light guide plate is arranged in the frame. The first hanging element further has a positioning portion erected on a surface of the first body portion opposite to the light guide plate. The frame has a positioning structure corresponding to the positioning portion, and the positioning portion and the positioning structure are adapted to be combined with each other.

[0015] In an embodiment of the present application, the first hanging element further has two buffer pieces. The two buffer pieces are located on opposite sides of the surface, and the two buffer pieces are inclined towards each other relative to the surface. The two buffer pieces are adapted to abut against the frame.

[0016] In an embodiment of the present application, the backlight module further comprises a limiting member. The limiting member has a rod portion and a stop portion connected to each other. The rod portion is arranged between the positioning portion and the frame, and the stop portion is adapted to abut against the positioning portion and the frame.

[0017] In an embodiment of the present application, the backlight module further comprises a second optical film. The light guide plate further has a second light exit surface opposite to the first light exit surface. The groove has a second opening formed in the second light exit surface. The second optical film is arranged opposite to the second light exit surface. The hanging assembly further has a second tongue portion. The second tongue portion is connected to a side of the first body portion opposite to the first tongue portion, and protrudes out of the second light exit surface through the second opening. The second tongue portion positions the second optical film.

[0018] In an embodiment of the present application, the first body portion is in the form of a sheet, and has a second edge. The second edge corresponds to the second opening. The second tongue portion has two second segments connected to opposite sides of the second edge.

[0019] The backlight module of the present application employs the hanging assembly arranged on the first side of the light guide plate, and suspends the first optical film from the first light exit surface. Further, since the first optical film is suspended on the light guide plate through the hanging assembly, when the light guide plate is affected by temperature and changes in volume, the hanging assembly can provide the first optical film with an amount of stretching or compression approximately equal to the change in volume of the light guide plate, thereby effectively preventing the first optical film from being excessively stretched or compressed. In addition, the same technical means can be applied to the second optical film, which will not be described herein. Based on the above, the backlight module and the hanging assembly of the present application can provide the advantage of easily maintaining the first optical film (and the second optical film) flat. Similarly, the backlight module and the hanging assembly of other embodiments of the present application can provide the advantage of easily maintaining the first optical film (and the second optical film) flat.

[0020] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the above description can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of a backlight module according to an embodiment of the present application.

[0022] Figure 2is Figure 1 enlarged view of the area Z1.

[0023] Figure 3 is Figure 2 a first suspension element and a light guide plate.

[0024] Figure 4 is Figure 2 a cross-sectional view of the backlight module.

[0025] Figure 5 is Figure 1 an enlarged view of the area Z2.

[0026] Figure 6 is Figure 5 a cross-sectional view of the backlight module.

[0027] Figure 7 is a schematic view of a backlight module according to another embodiment of the application.

[0028] Figure 8 is Figure 7 a light guide plate, a frame and a buffer element of the area Z3.

[0029] Figure 9 is Figure 7 a cross-sectional view of the area Z3.

[0030] Figure 10 is a schematic view of a backlight module according to another embodiment of the application.

[0031] Figure 11 is Figure 10 a cross-sectional view along the section line A-A.

[0032] Figure 12 is Figure 10 a first suspension element.

[0033] Figure 13 is a schematic view of a backlight module according to another embodiment of the application.

[0034] Figure 14 is a schematic view of a backlight module according to an embodiment of the application.

[0035] Figure 15 is Figure 14 an enlarged view of the area Z4.

[0036] Figure 16 is Figure 15 a suspension assembly.

[0037] Figure 17 is Figure 16 a suspension assembly from another perspective.

[0038] Figure 18 is Figure 15 a schematic view of the backlight module 100 from another perspective.

[0039] Figure 19 is Figure 15 a sectional view along the section line B-B.

[0040] Figure 20 is Figure 15 a schematic view of the backlight module 100 from another perspective.

[0041] Figure 21 is Figure 20 a sectional view along the section line C-C. DETAILED DESCRIPTION

[0042] Figure 1 is a schematic view of the backlight module 100 according to an embodiment of the present application. Figure 2 is Figure 1 a zoomed-in view of the area Z1. Figure 3 is Figure 2 a zoomed-in view of the first hanging element 131 and the light guide plate 110. Please refer to Figure 1 , the backlight module 100 comprises a light guide plate 110, a first optical film 120, and a hanging assembly 130. As shown in Figure 2 and Figure 3 , the light guide plate 110 has a first side surface 111 (also shown in Figure 1 ) and a first light exit surface 112 connected to each other. The first side surface 111 has a groove G. The first optical film 120 (shown in Figure 2 ) is arranged corresponding to the first light exit surface 112. The hanging assembly 130 comprises a first hanging element 131. The first hanging element 131 has a first body portion 1310 and a first tongue portion 1311. The first body portion 1310 has a first portion P1 and a second portion P2 connected to each other. The first portion P1 is arranged in the groove G, and the second portion P2 is bent relative to the first portion P1. The first tongue portion 1311 is arranged on the second portion P2 and protrudes away from the second portion P2. The first tongue portion 1311 positions the first optical film 120.

[0043] Please refer to Figure 1The material of the light guide plate 110 can include PMMA (polymethyl methacrylate), but the present application is not limited thereto. In the present embodiment, the backlight module 100 is a side-light type backlight module, for example, so a light emitting element (not shown) can be disposed at the edge of the light guide plate 110. Specifically, the light guide plate 110 can also have a second side surface 113 opposite to the first side surface 111, and the aforementioned light emitting element can be disposed opposite to the second side surface 113. In other embodiments, the backlight module 100 can be a direct-light type backlight module, and the present application is not limited in these details.

[0044] Please refer to Figure 2 and Figure 3 , the material of the first hanging element 131 can include metal; for example, the shape of the first hanging element 131 can be formed by cutting and bending a metal sheet. It can be understood that the specific shape of the first hanging element 131 can be different from the shape shown in Figure 2 and Figure 3 , according to different materials and processes, and the present application is not limited in this regard.

[0045] Please refer to Figure 1 , it is worth mentioning that in the present embodiment, the number of the first hanging elements 131 is multiple, for example, and the number of the grooves G of the light guide plate 110 corresponds to the number of the first hanging elements 131. In detail, each first hanging element 131 can be fixed to a specific position on the first side surface 111 through each groove G; in this way, when the volume of the light guide plate 110 expands or shrinks due to temperature changes, each first hanging element 131 can move together with the volume change of the light guide plate 110. For example, when the volume of the light guide plate 110 expands due to temperature changes, the distance D between each first hanging element 131 will increase, and the volume change of the light guide plate 110 is positively correlated with the change in the distance D. Therefore, it can effectively avoid that each first hanging element 131 excessively stretches or compresses the first optical film 120, thereby making the first optical film 120 more easily maintain flatness.

[0046] Figure 4 is Figure 2 a cross-sectional view of a backlight module. Please refer to Figure 3 and Figure 4 , the backlight module 100 also includes a second optical film 140 (shown in Figure 4The light guide plate 110 can also have a second light exit face 114 opposite the first light exit face 112, and the second optical film 140 is disposed corresponding to the second light exit face 114. The first hanging element 131 can also have a second tongue portion 1312. The first body portion 1310 can also have a third portion P3. The third portion P3 is connected to a side of the first portion P1 opposite the second portion P2, and is bent relative to the first portion P1. The second tongue portion 1312 is erected on the third portion P3, and positions the second optical film 140. In short, both sides of the hanging assembly 130 can be used to hang the optical film, so that the backlight module 100 can be configured with two optical films to be applied to a double-sided display device. It can be understood that in an embodiment, the backlight module 100 can be configured with one optical film (for example, the first optical film 120) to be applied to a single-sided display device, and the hanging assembly 130 can omit the third portion P3 and the second tongue portion 1312, and the first portion P1 can be adhered and fixed to the first side face 111, so that the first hanging element 131 is fixed in the groove G, but the present application does not limit the fixing manner.

[0047] Compared with the prior art, the backlight module 100 of the embodiment adopts the hanging assembly 130, which is disposed on the first light exit face 112 of the light guide plate 110, and hangs the first optical film 120 from the first side face 111. Further, because the first optical film 120 is hung on the light guide plate 110 via the hanging assembly 130, the volume change of the light guide plate 110 caused by the temperature can be approximately estimated to the stretching or compression amount of the first optical film 120, so that the first optical film 120 is not excessively stretched or compressed. Based on the above, the backlight module 100 of the embodiment and the hanging assembly 130 can provide the advantage of easily maintaining the flatness of the first optical film 120.

[0048] Figure 5 is an enlarged schematic view of the region Z2 of Figure 1 is a schematic view of a cross section of the backlight module of Figure 6 is a schematic view of a cross section of the backlight module of Figure 5 Please refer to Figure 1 The hanging assembly 130 (marked in Figure 1 ) can also include a second hanging element 132. As shown in Figure 5 and Figure 6 The second hanging element 132 has a second body portion 1320 and a third tongue portion 1321. The second body portion 1320 abuts against the first light exit face 112 (also marked in Figure 1 ), and is close to the second side face 113 (also marked in Figure 1 ). The third tongue portion 1321 is erected on the second body portion 1320, and protrudes away from the second body portion 1320. The third tongue portion 1321 positions the first optical film 120. Further, please refer to Figure 1Because the first side 111 and the second side 113 are opposite, the first hanging element 131 and the second hanging element 132 can pull the first optical film 120 from opposite sides of the first optical film 120, so that the first optical film 120 is easier to maintain flat. It is noted that the number of the second hanging elements 132 is multiple, and the number of the second hanging elements 132 can correspond to the number of the first hanging elements 131, and the present application does not limit the number of the second hanging elements 132 and the number of the first hanging elements 131. Please refer to Figure 5 and Figure 6 In the present embodiment, the second hanging element 132 also has a base portion 1322 (shown in Figure 5 ) for example. The base portion 1322 is connected to the end of the second body portion 1320 close to the second side 113 and is bent relative to the second body portion 1320. In detail, the base portion 1322 can abut against a part on the second side 113 of the light guide plate 110; for example, the base portion 1322 of the present embodiment can abut against a light emitting element (not shown), but the present application does not limit this. Please continue to refer to Figure 6 In the present embodiment, because the backlight module 100 also has the second optical film 140, the second hanging element 132 can also be arranged on the side of the second light emitting surface 114 close to the second side 113.

[0049] Figure 7 is a schematic view of a backlight module according to another embodiment of the present application. Figure 8 is a schematic view of the light guide plate, the frame and the buffer element of the region Z3 of Figure 7 . Figure 9 is a sectional view of the region Z3 of Figure 7 . The structure and advantages of the backlight module of the present embodiment are similar to those of the embodiment of Figure 1 . Only the differences will be described below. Please refer to Figure 7 , the backlight module 100a also includes a frame 150 and a buffer element 160 (shown in Figure 8 ), and the light guide plate 110 is arranged in the frame 150. Please refer to Figure 8 and Figure 9The first portion P1 of the first suspension element 131 is located between the frame 150 and the light guide plate 110. The buffer element 160 is located between the first portion P1 and the frame 150. In detail, the buffer element 160 can alleviate the pressure of the light guide plate 110 pressing against the first portion P1 due to the volume expansion of the light guide plate 110 caused by temperature, so as to prevent the structure of the light guide plate 110 from being damaged. In addition, when the volume of the light guide plate 110 stops expanding and starts shrinking, the buffer element 160 can also exert a restoring force generated by compression on the first suspension element 131, so as to push the first suspension element 131 to move towards the first side surface 111. In this way, the buffer element 160 can also ensure that the first suspension element 131 can abut against the first side surface 111. In the embodiment, the material of the buffer element 160 can include rubber, and the shape of the buffer element 160 can be block-shaped, but other embodiments are not limited thereto. In addition, in the embodiment, the number of the buffer element 160 is one, so as to simplify the installation process of the buffer element 160. However, in an embodiment, the number of the buffer element 160 can be multiple.

[0050] The first suspension element 131 of the embodiment can also have a positioning portion 1313. The first portion P1 has opposite first and second surfaces S1 and S2. It should be noted that the first surface S1 is, for example, directed towards and abuts against the first side surface 111 of the light guide plate 110 (marked as Figure 8 ), and the second surface S2 can be opposite to the first side surface 111. The second portion P2 is connected to the first surface S1, and the positioning portion 1313 is located on the second surface S2. In detail, the positioning portion 1313 can be used for positioning and installation of other parts. For example, the frame 150 of the embodiment can have a positioning groove 151 corresponding to the positioning portion 1313, so that the frame 150 is easier to be positioned and installed. Further, the first suspension element 131 can be arranged on the first side surface 111 of the light guide plate 110 first, and then the positioning groove 151 of the frame 150 is aligned with the positioning portion 1313 of the first suspension element 131, so as to complete the installation of the frame 150. It should be noted that in other embodiments, the shape and detailed structure of the frame 150 can be different from those shown in Figure 7 and Figure 8 .

[0051] Figure 10 is a schematic view of a backlight module according to another embodiment of the present application. Figure 11 is a sectional view along the A-A section line. Figure 10 is a schematic view of a first suspension element of Figure 12 . Figure 10 Figure 13 is a schematic view of a backlight module according to another embodiment of the present application. The structure and advantages of the backlight module 100b and the suspension assembly 130b of the embodiment are similar to those of the embodiment of Figure 7 . Only the differences will be described below. Please refer to Figure 10 ​The back light module 100b further comprises a limiting member 170, for example. Please refer to Figure 11 and Figure 12 The positioning portion 1313b of the first hanging element 131b can be in a sheet shape, and has a positioning slot H. The positioning slot H extends to a side of the positioning portion 1313b which is opposite to the second surface S2. Please refer to Figure 11 The limiting member 170 has a rod portion 171 and a stop portion 172 connected to each other. The rod portion 171 is arranged in the positioning slot H. The stop portion 172 is opposite to the positioning portion 1313b, and is adapted to stop the positioning portion 1313b from being folded relative to the first body portion 1310b. In detail, please refer to Figure 10 and Figure 11 The first hanging element 131b can be fixed to the light guide plate 110 via the first body portion 1310b, and when the light guide plate 110 expands or shrinks in volume due to temperature influence, the first hanging element 131b can be driven by the light guide plate 110 to slightly move relative to the limiting member 170. Further, please refer to Figure 10 and Figure 13 The number of the first hanging elements 131b can be plural, and the first hanging elements 131b are arranged on opposite sides of the light guide plate 110; in this way, when the light guide plate 110 expands or shrinks in volume, the first hanging elements 131b can slightly move along the positioning slot H (shown in Figure 11 ) relative to the limiting member 170, so as to avoid the limiting member 170 interfering with the moving path of each first hanging element 131b. As shown in Figure 11 In the embodiment, the rod portion 171 and the positioning slot H are, for example, gap-fitted, so as to further avoid the rod portion 171 interfering with the first hanging element 131b. Incidentally, the limiting member 170 of the embodiment is, for example, a screw, wherein the rod portion 171 can be a screw rod of the screw, and the stop portion 172 can be a head portion of the screw. In addition, in the embodiment, the rod portion 171 of the limiting member 170 is fixed to the frame 150, but the present application is not limited thereto.

[0052] Figure 14 is a schematic view of a back light module according to an embodiment of the present application. Figure 15 is an enlarged schematic view of the region Z4 of Figure 14 . Figure 16 is a schematic view of a hanging assembly of Figure 15 . Please refer to Figure 14 and Figure 15 The back light module 200 comprises a light guide plate 210, a first optical film 220, and a hanging assembly A, wherein the hanging assembly A comprises a first hanging element 230. Please refer to Figure 15 The light guide plate 210 has a side surface 211 and a first light exit surface 212 connected to each other (also shown in Figure 14). The side surface 211 has a groove G, and the groove G is formed with a first opening O1 at the first light exit surface 212. The first optical film 220 is disposed opposite to the first light exit surface 212. As shown in Figure 15 As shown in Figure 16 , the first hanging element 230 has a first body portion 231 (also marked in Figure 17 ) and a first tongue portion 232. The first body portion 231 is disposed in the groove G. The first tongue portion 232 is connected to the first body portion 231 and extends away from the first body portion 231. The first tongue portion 232 protrudes out of the first light exit surface 212 via the first opening O1, and the first tongue portion 232 suspends the first optical film 220.

[0053] Please refer to Figure 14 , the features of the light guide plate 210 and the first optical film 220 are the same as those of the light guide plate 110 and the first optical film 120 of Figure 1 , and thus the relevant description is omitted here.

[0054] Similarly, the features of the first hanging element 230 are generally the same as those of the first hanging element 131 of Figure 1 , and thus only the differences are described below. Please refer to Figure 15 and Figure 16 , the first body portion 231 can be in the form of a sheet and can have a first edge E1 corresponding to the first opening O1. The first tongue portion 232 has two first segments L1 connected to opposite sides of the first edge E1. However, in an embodiment, the first tongue portion 232 can extend along the first edge E1.

[0055] Figure 17 is a schematic view of another perspective of the hanging assembly of Figure 16 . Please refer to Figure 15 and Figure 17 , the backlight module 200 further comprises a frame 240 (marked in Figure 15 ) for example, and the light guide plate 210 is disposed in the frame 240. The first hanging element 230 can further have a positioning portion 233 standing on a surface S (marked in Figure 17 ) of the first body portion 231 facing away from the light guide plate 210 and extending away from the surface S. The first tongue portion 232 extends along the surface S. The frame 240 has a positioning structure 241 corresponding to the positioning portion 233, and the positioning portion 233 and the positioning structure 241 are adapted to be combined with each other. In this way, the frame 240 can be more easily aligned and installed. In the present embodiment, the positioning structure 241 is a positioning groove for example, but the present application is not limited in this regard. In addition, the positioning portion 233 of the present embodiment can be in the form of a sheet, but other embodiments are not limited in this regard.

[0056] Figure 18 is a schematic view of another perspective of the hanging assembly of Figure 15A schematic view of the suspension assembly of the light guide plate 210 against the frame 240. Figure 19 is Figure 15 A schematic view along the section line B-B. Please refer to Figure 17 and Figure 18 The first suspension element 230 can further have two buffer pieces 234 (also marked in Figure 16 ). The two buffer pieces 234 are located on opposite sides of the surface S, and the two buffer pieces 234 are inclined toward each other relative to the surface S. The two buffer pieces 234 are adapted to abut against the frame 240 (shown in Figure 18 ). Specifically, the two buffer pieces 234 can abut against the frame 240 as the light guide plate 210 expands in volume due to temperature effects, and thereby absorb the volume expansion of the light guide plate 210. Thus, the two buffer pieces 234 can prevent the light guide plate 210 from excessively stretching the first optical film 220 due to volume expansion. In addition, when the volume of the light guide plate 210 begins to contract, the first suspension element 230 can push against the frame 240 via the two buffer pieces 234 to abut against the light guide plate 210. In this way, the two buffer pieces 234 can also ensure that the first suspension element 230 is fixed in the groove G during the volume contraction of the light guide plate 210. By the way, as shown in Figure 15 and Figure 19 , the backlight module 200 further includes a limiting member 250, for example. The limiting member 250 has a rod portion 251 (shown in Figure 19 ) and a stop portion 252 connected to each other. The rod portion 251 is arranged between the positioning portion 233 and the frame 240, and the stop portion 252 is adapted to press against the positioning portion 233 and the frame 240 to prevent the first suspension element 230 from being squeezed out of the frame 240 and the light guide plate 210. In the present embodiment, the limiting member 250 is a screw, for example, wherein the rod portion 251 can be a shank of the screw, and the stop portion 252 can be a head of the screw. However, the present application does not limit the specific structure of the limiting member 250 too much.

[0057] Figure 20 is Figure 15 a schematic view of another perspective of the backlight module. Figure 21 is Figure 20 A schematic view along the section line C-C. Please refer to Figure 20 and Figure 21 The backlight module 200 can further include a second optical film 260. The light guide plate 210 can further have a second light exit surface 213 (also marked in Figure 18 ). The second light exit surface 213 is opposite to the first light exit surface 212. Please continue to refer to Figure 21 , the groove G is formed with a second opening O2 (also shown in Figure 18 ) on the second light exit surface 213. The second optical film 260 is arranged opposite to the second light exit surface 213. Please refer to Figure 17 , Figure 20 andFigure 21 The first suspension element 230 may also have a second tongue portion 235 (also marked as...). Figure 16 and Figure 18 The second tongue portion 235 connects to the side of the first body portion 231 opposite to the first tongue portion 232, and protrudes from the second opening O2 relative to the second light-emitting surface 213. (Example) Figure 20 and Figure 21 As shown, the second tongue portion 235 suspends the second optical film 260. In short, optical films can be suspended on both opposite sides of the first suspension element 230, thus the backlight module 200 can be configured with two optical films and can be applied to a double-sided display device. It is understood that in one embodiment, the backlight module 200 can be configured with one optical film (e.g., the first optical film 220) for application to a single-sided display device, and the second tongue portion 235 can be omitted from the first suspension element 230. In this embodiment, the features of the second optical film 260 are similar to those of the first optical film 220, so related descriptions are omitted here. Similarly, the first body portion 231, for example, has a second edge E2. The second edge E2 corresponds to the second opening O2. The second tongue portion 235 has two second segments L2, which connect opposite sides of the second edge E2. However, in one embodiment, the second tongue portion 235 can extend along the second edge E2.

[0058] Please refer to this again. Figure 14 It is worth mentioning that the backlight module 200 in this embodiment can also be configured with Figure 1 The suspension assembly 130. For example, the first suspension element 131 and the second suspension element 132 may be disposed on opposite sides of the light guide plate 210, and the first suspension element 230 may be located between the first suspension element 131 and the second suspension element 132. However, in one embodiment, the backlight module 200 may omit the first suspension element 131 and the second suspension element 132, or... Figure 14 The first suspension element 131 and the second suspension element 132 are replaced with the first suspension element 230, but the present invention does not impose further limitations on these details. Furthermore, the present invention does not impose further limitations on the number of the first suspension element 230, the first suspension element 131, and the second suspension element 132.

[0059] Compared with the prior art, the backlight module 200 of the embodiment adopts the first suspension element 230 (i.e., the suspension assembly A), and the first suspension element 230 is arranged on the first side surface 211 of the light guide plate 210 and suspends the first optical film 220 from the first light exit surface 212. Further, because the first optical film 220 is suspended on the light guide plate 210 via the first suspension element 230, when the light guide plate 210 is affected by temperature and changes in volume, the first suspension element 230 can provide the first optical film 220 with a stretching amount or a compression amount that is approximately equal to the change in volume of the light guide plate 210, so that the first optical film 220 is not excessively stretched or compressed. In addition, the same technical means can be applied to the second optical film 260, and will not be described again. Based on the above, the backlight module 200 and the first suspension element 230 of the embodiment can provide the advantage of easily maintaining the flatness of the first optical film 220 (and the second optical film 260).

[0060] In summary, the backlight module of the present application adopts a suspension assembly, and the suspension assembly is arranged on the first side surface of the light guide plate and suspends the first optical film from the first light exit surface. Further, because the first optical film is suspended on the light guide plate via the suspension assembly, when the light guide plate is affected by temperature and changes in volume, the suspension assembly can provide the first optical film with a stretching amount or a compression amount that is approximately equal to the change in volume of the light guide plate, so that the first optical film is not excessively stretched or compressed. In addition, the same technical means can be applied to the second optical film, and will not be described again. Based on the above, the backlight module and the suspension assembly of the present application can provide the advantage of easily maintaining the flatness of the first optical film (and the second optical film). Similarly, the backlight module and the suspension assembly of other embodiments of the present application can provide the advantage of easily maintaining the flatness of the first optical film (and the second optical film).

[0061] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed methods and technical contents to make equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A backlight module, characterized by, The backlight module comprises: a light guide plate having a first side surface and a first light exit surface connected to each other, the first side surface having a groove; a first optical film disposed corresponding to the first light exit surface; and a hanging assembly comprising a first hanging element, the first hanging element having a first body portion and a first tongue portion, wherein the first body portion has a first portion and a second portion connected to each other, the second portion being bent relative to the first portion, and the first tongue portion is erected on the second portion, wherein the first portion is disposed in the groove, and the first tongue portion positions the first optical film. The first hanging element of the hanging assembly further has a positioning portion, the first portion of the first hanging element has a first surface and a second surface opposite to each other, the second portion of the first hanging element is connected to the first surface, the positioning portion is erected on the second surface, the positioning portion is in a sheet shape and has a positioning slot, and the positioning slot extends to a side of the positioning portion opposite to the second surface, the backlight module further comprises a limiting member, wherein the limiting member has a rod portion and a blocking portion connected to each other, the rod portion is arranged in the positioning slot of the positioning portion, the blocking portion is opposite to the positioning portion of the first hanging element, and is adapted to block the positioning portion from being folded relative to the first portion.

2. The backlight module of claim 1, wherein, The first hanging element further has a second tongue portion, and the first body portion further has a third portion connected to a side of the first portion opposite to the second portion, the third portion is bent relative to the first portion, and the second tongue portion is erected on the third portion, the backlight module further comprises a second optical film, wherein the light guide plate further has a second light exit surface opposite to the first light exit surface, the second optical film is disposed corresponding to the second light exit surface, and the second tongue portion of the first hanging element positions the second optical film.

3. The backlight module of claim 1, wherein, The backlight module further comprises a frame and a buffer element, wherein the light guide plate is arranged in the frame, the first portion of the first hanging element is located between the frame and the light guide plate, and the buffer element is arranged between the first portion and the frame.

4. The backlight module of claim 1, wherein, The hanging assembly further comprises a second hanging element, the second hanging element has a second body portion and a third tongue portion, and the third tongue portion is erected on the second body portion.

5. The backlight module of claim 4, wherein, The second hanging element further has a base portion connected to an end of the second body portion. The second hanging element further has a base portion connected to an end of the second body portion.

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