TW202214078A - Frame structure, backlight module and display device - Google Patents

Abstract

A frame structure includes a back plate and an outer frame. The back plate includes a body part for carrying an optical unit, and at least one extension part extending from the body part. The outer frame includes at least one connecting section coupled with the back plate, and a side wall section connecting the connecting section and surrounding the optical unit. The connecting section is superposed and combined with the extension part of the back plate, and the extension part does not extend between the side wall section and the optical unit. The effect of the invention is that the joint position of the back plate and the outer frame is extended to the outside or back side of the back plate and the outer frame, which can effectively reduce the width of the frame and achieve a narrow frame design. The invention also provides a backlight module and a display device including the frame structure.

Description

Frame structure, backlight module and display device

The present invention mainly relates to an outer frame, and particularly relates to a frame structure for a backlight module.

Display panels and display devices using the display panels have gradually become the mainstream of various display devices. For example, various panel display screens, household flat-screen TVs, personal computers, mobile phones, and digital cameras are all products that use a large number of display panels. Especially in recent years, the market demand for liquid crystal display devices has grown substantially. In order to meet the functional and appearance requirements of liquid crystal display devices, the designs of backlight modules used in liquid crystal display devices are also increasingly diversified.

In order to cope with the trend of narrow bezels of modern mobile devices or various display devices, most of the current narrow bezel structures use methods such as compressing the thickness of the frame member and the assembly space, but the thickness of the frame member also has a limit, and most of the assembly adopts the hook design. , the hook setting requires the structure of the back frame and the outer frame to cooperate with each other, which cannot effectively reduce the width of the frame to meet the design requirements of a narrow frame.

The purpose of the present invention is to provide a frame structure which can reduce the width of the frame.

In order to achieve the above object, the present invention provides a frame structure, comprising: a back plate, including a body portion for carrying an optical unit, and at least one extension portion extending from the body portion; and an outer frame, including and the At least one joint section combined with the back plate, and a side wall section connecting the joint section and surrounding the optical unit, wherein the joint section and the extension part of the back plate are overlapped and combined with each other, and the extension part does not extend between the side wall section and the optical unit.

The present invention further provides a backlight module and a display device including the frame structure.

In some embodiments, the main body portion of the back plate has a carrying surface for carrying the optical unit, and a back surface opposite to the carrying surface, and the extension portion of the back plate extends from the main body portion and abuts against the back plate On the back of the main body, the combined section of the outer frame extends from the side wall section and is stacked on the extension of the back panel.

In some embodiments, the extension part of the back plate extends continuously from the edge of the main body part, and forms a step difference with the main body part, a distance is formed between the extension part and the optical unit, and the combined section of the outer frame stacked on the extension of the backplane.

In some embodiments, the extension portion of the back panel extends from the body portion toward the same direction as the extension direction of the body portion, and the joint section of the outer frame extends from the side wall section and is stacked on the back panel the extension of the plate.

In some embodiments, the extension portion of the back plate extends from the body portion toward a direction different from the extension direction of the body portion, and the joint section of the outer frame extends from the side wall section and is stacked on the back panel the extension of the plate.

In some embodiments, the extension portion is formed by bending a side of the body portion toward a side away from the optical unit and then extending, and a side of the coupling section away from the sidewall section faces the direction of the body portion After bending, it extends and surrounds the back plate to form a plate body, and the plate body and the back plate together form an accommodating space.

In some embodiments, the extension portion is formed by bending and extending from a side of the body portion to a side away from the optical unit, and the coupling section surrounds the back panel and is connected to the back panel and a structural panel. Together to form an accommodating space, the structural board includes a base portion and at least one joint portion extending from the base portion and stacked on the inner side of the extending portion.

In some embodiments, the extension portion is formed by bending and extending from a side of the body portion to a side away from the optical unit, and the coupling section surrounds the back panel and is connected to the back panel and a cover panel. A glass back plate of the assembly together forms an accommodating space, and the cover plate assembly further has a plurality of side bars for combining the glass back plate with the extension portion, each side bar includes a base portion, and extends and overlaps from the base portion In a joint part inside the extension part, the glass back plate is abutted against the back surfaces of the plurality of base parts.

In some embodiments, the extension portion of the back plate is bonded to the bonding section of the outer frame.

In some embodiments, the extension portion of the back plate has a first through hole, the joint section of the outer frame has a second through hole, and the frame structure further includes a through the first through hole and the second through hole locking unit.

In some embodiments, the first through hole and the second through hole are formed with internal threads, and the locking unit includes a screw member screwed into the first through hole and the second through hole.

In some embodiments, the locking unit includes a stud at least combined with the first through hole of the back plate, and a screw element screwed on the stud.

The frame structure of the present invention has the following characteristics: the joint position of the back plate and the outer frame can be extended to the outside or the back side of the back plate and the outer frame, so that the width of the frame can be effectively reduced to meet the requirements of the narrow frame. design.

〔this invention〕

21: Backplane

211: body part

212: Extensions

213: Bearing surface

214: Back

215: First Piercing

22: Outer frame

221: Combined segment

222: Side Wall Section

223: Bearer segment

224: Second Piercing

23: Optical unit

231: light guide plate

232: Optical film

24: Display panel

25: Adhesive layer

26: Locking unit

261: Stud

262: Screws

263: Head

31: Backplane

311: body part

312: Extensions

313: First Piercing

32: Outer frame

321: Combined segment

322: Side Wall Section

323: Bearer segment

324: Second Perforation

33: Optical unit

34: Display panel

35: Adhesive layer

36: Locking unit

361: Stud

362: Screws

363: Head

41: Backplane

411: body part

412: Extensions

413: First Piercing

42: Outer frame

421: Combined segment

422: Side Wall Section

423: Bearer segment

424: Board body

425: Second Perforation

43: Optical unit

44: Display panel

45: Adhesive layer

46: Locking unit

461: Stud

462: Screws

463: Head

5: Structural board

51: Base

52: Joint

53: Third Piercing

6: Cover assembly

61: glass back panel

62: Edges

621: Base

622: Joint

623: Third Piercing

D: Spacing

P1: Visible area

P2: border area

S: accommodating space

[FIG. 1] is a perspective view of a first preferred embodiment of the display device of the present invention;

[ Fig. 2 ] is a perspective view of the first preferred embodiment of the display device of the present invention viewed from the bottom;

[ Fig. 3 ] is a partial perspective view of the display device of the present invention, illustrating the arrangement of each element;

[Fig. 4] is a partial side view to assist in explaining Fig. 3;

[ Fig. 5 ] is a partial perspective view of the second preferred embodiment of the display device of the present invention;

[ FIG. 6 ] is a partial side view to assist in explaining FIG. 5 ;

[ Fig. 7 ] is a partial perspective view of the third preferred embodiment of the display device of the present invention;

[ FIG. 8 ] is a partial side view to assist in explaining FIG. 7 ;

[FIG. 9] is a partial cross-sectional view illustrating that the third preferred embodiment has an accommodating space;

[Fig. 10] is a partial cross-sectional view illustrating another aspect of the accommodating space in the third preferred embodiment;

[FIG. 11a] is a partial side view illustrating another aspect of the accommodating space in the third preferred embodiment;

[FIG. 11b] is a partial perspective view to assist in explaining FIG. 11a, and the back plate and the glass back plate are omitted;

[ Fig. 12 ] is a partial perspective view illustrating another aspect of the third preferred embodiment;

[ Fig. 13 ] A partial side view to assist in explaining Fig. 12 .

The features and technical contents of the relevant patent applications of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Before the detailed description, it should be noted that similar elements are designated by the same reference numerals.

Please refer to FIGS. 1-2 , which is a first preferred embodiment of the display device of the present invention, which includes a backplane 21 , an outer frame 22 , and an optical unit limited by the backplane 21 and the outer frame 22 . unit 23 , and a display panel 24 disposed on the outer frame 22 and located on the light-emitting side of the optical unit 23 .

Referring to FIGS. 3 and 4 , the back plate 21 includes a main body portion 211 for carrying the optical unit 23 , and a plurality of extension portions 212 extending from the main body portion 211 . In this preferred embodiment, the back plate 21 may be made of metal material.

The outer frame 22 includes a plurality of combining segments 221 combined with the extending portion 212 of the back plate 21 , a side wall segment 222 connecting the combining segments 221 and surrounding the optical unit 23 , and a side wall segment 222 extending from the side wall segment 222 to the optical unit 23 . A bearing section 223 extending in the direction of the optical unit 23, in this preferred embodiment, the outer frame 22 can be made of plastic material (PVC).

The display panel 24 is disposed on the bearing section 223 of the outer frame 22 , and can be fixed on the bearing section 223 by an adhesive layer 25 . Therefore, there is no outer frame outside the edge of the display panel 24, which achieves the design effect of no frame. This can increase the screen-to-screen ratio of the display and enhance the design texture, which is in line with the current aesthetic trend and helps improve customers' willingness to buy.

In one embodiment, it can be applied to an optical unit of an edge-type backlight module. The optical unit 23 includes a light guide plate 231, a light bar (not shown in the figure) disposed on one side of the light guide plate 231, and a stack. At least one optical film 232 placed on the light guide plate 231 is shown in FIG. 3 .

In other embodiments, it can also be an optical unit suitable for a direct type backlight module. The optical unit 23 includes a plurality of light-emitting units arrayed on a substrate, and at least one optical film 232 stacked above the light-emitting units. .

The body portion 211 of the back plate 21 has a carrying surface 213 for carrying the optical unit 23 and a back surface 214 opposite to the carrying surface 213 . The extension portion 212 of the back plate 21 is formed by a The side is extended and folded back to abut against the back surface 214 of the main body portion 211 . It should be further explained that, the combination method of the back plate 21 and the outer frame 22 can also be directly bonded by adhesive, or can also be used in a locking method.

As shown in FIG. 3 and FIG. 4 , each extending portion 212 of the back plate 21 has at least one first through hole 215 , and each connecting section 221 of the outer frame 22 has at least one second through hole 224 , and the frame structure further includes A plurality of locking units 26 , each locking unit 26 passes through the first through hole 215 and the second through hole 224 to lock the back plate 21 and the outer frame 22 . In this embodiment, each locking unit 26 includes a stud 261 coupled to the first through hole 215 of the back plate 21 , a screw element 262 screwed to the stud A head 263 at one end of the joint 262 is attached.

The stud 261 is formed with an internal thread, the threaded member 262 is directly screwed to the stud 261, and the head 263 of the threaded member 262 can be pressed on the joint section 221 of the outer frame 22 at the same time, so as to The connecting section 221 of the outer frame 22 can be firmly and firmly attached to the extending portion 212 of the back plate 21 . Besides, the design of the extension portion 212 being folded back can increase the locking space of the screw element 262 and enhance the stability of the assembly structure. At the same time, the extension portion 212 is folded to form a chamfer, which also has the effect of guiding the assembly of the outer frame 22 . In some embodiments, the first through hole 215 and the The two through holes 224 may be formed with internal threads, and the screwing member 262 is directly screwed to the first through holes 215 and the second through holes 224 , and the stud 261 does not need to be additionally provided.

As shown in FIG. 4 , generally speaking, a display device can be divided into a visual area P1 capable of displaying a picture, and a border area P2 from the edge of the visual area P1 to the outermost side of the display device. In this preferred embodiment, the joint position of the back plate 21 and the outer frame 22 is located on the back side of the back plate 21 , so the thickness of the frame of the display device of the present invention is only limited by the outer frame 22 . There is no avoidance means provided between the outer frame 22 and the optical unit 23 at the joint position of the board 21 and the outer frame 22, which can effectively reduce the width of the frame area P2, thereby achieving the effect of a narrow frame.

Referring to FIG. 5 and FIG. 6, it is a second preferred embodiment of the display device of the present invention, comprising a back plate 31, an outer frame 32, an optical unit 33 limited by the back plate 31 and the outer frame 32 together, and a display panel 34 disposed on the outer frame 32 and located on the light-emitting side of the optical unit 33 .

The back plate 31 includes a body portion 311 for supporting the optical unit 33 , and a plurality of extension portions 312 extending from the body portion 311 .

The outer frame 32 includes a plurality of combining segments 321 combined with the extending portion 312 of the back plate 31 , a side wall segment 322 connecting the combining segments 321 and surrounding the optical unit 33 , and connecting the side wall segments 322 to the side wall segment 322 . A carrying section 323 extending in the direction of the optical unit 33 . Due to the viewing angle, only one of the extension portion 312 and the combined segment 321 is shown.

The display panel 34 is disposed on the bearing section 323 of the outer frame 32 and can be fixed on the bearing section 323 by an adhesive layer 35 .

In this preferred embodiment, the extension portion 312 of the back plate 31 extends continuously from the edge of the main body portion 311 , and forms a level difference with the main body portion 311 , so that the extension portion 312 and the optical unit 33 are formed between the extension portion 312 and the optical unit 33 . A distance D, the coupling section 321 of the outer frame 32 is stacked on the extension of the back plate 31 on the extension 312. Each extending portion 312 of the back plate 31 has at least one first through hole 313 , and each combining section 321 of the outer frame 32 has at least one second through hole 324 , and the frame structure further includes a plurality of locking units 36 , each The locking unit 36 passes through the first through hole 313 and the second through hole 324 to lock the back plate 31 and the outer frame 32 .

In this embodiment, each locking unit 36 includes a stud 361 coupled to the first through hole 313 of the back plate 31 , a threaded member 362 screwed to the stud 361 , and a threaded member 362 disposed on the threaded stud 361 . A head 363 at one end of the joint 362 is attached. In this embodiment, because the structural strength of the back plate 31 made of metal material is greater than the structural strength of the outer frame 32 made of plastic material, the studs 361 are mainly implanted in the structure The back plate 31 with higher strength can strengthen the bonding stability. The stud 361 is formed with an internal thread, the screw member 362 is directly screwed to the stud 361, and the head 363 of the screw member 362 can be pressed on the joint section 321 of the outer frame 32 at the same time, So that the coupling section 321 of the outer frame 32 can be firmly and firmly attached to the extending portion 312 of the back plate 31 .

The preferred embodiment utilizes the extension portion 312 of the back plate 31 to form a design with a step difference, and the joint position of the back plate 31 and the outer frame 32 is set on the back side of the back plate 31, so that the frame of the display device of the present invention is formed. The thickness is only limited by the outer frame 32 , and there is no avoidance means provided between the outer frame 32 and the optical unit 33 at the joint position of the back plate 31 and the outer frame 32 , so that the effect of a narrow frame can be achieved. In addition, the above-mentioned step-difference design can generate stress to improve the structural strength of the back plate 31 , and at the same time, it can increase the locking space of the screw member 362 to enhance the stability of the assembly.

Referring to FIG. 7 and FIG. 8, it is a third preferred embodiment of the display device of the present invention, comprising a back plate 41, an outer frame 42, an optical unit 43 limited by the back plate 41 and the outer frame 42 together, and a display panel 44 disposed on the outer frame 42 and located on the light-emitting side of the optical unit 43 .

The back plate 41 includes a body portion 411 for supporting the optical unit 43 , and a plurality of extension portions 412 extending from the body portion 411 .

The outer frame 42 includes a plurality of combining segments 421 combined with the extension portion 412 of the back plate 41 , a side wall segment 422 connecting the combining segments 421 and surrounding the optical unit 43 , and connecting the side wall segment 422 to the side wall segment 422 . A carrying section 423 extending in the direction of the optical unit 43 . Due to the viewing angle, only one of the extension portion 412 and the combined segment 421 is shown.

The display panel 44 is disposed on the bearing section 423 of the outer frame 42 and can be fixed on the bearing section 423 by an adhesive layer 45 .

In this preferred embodiment, the extension portion 412 of the back plate 41 extends from the body portion 411 toward a direction different from the extension direction of the body portion 411 , more specifically, from one side of the body portion 411 For example, it is bent toward the side away from the optical unit 43 and then extended. The combined section 421 of the outer frame 42 extends from the side wall section 422 and is stacked on the extension 412 of the back plate 41 , and then uses a locking The unit 46 is coupled to the extension 412 of the back plate 41 .

Please refer to FIG. 9 , which is one of the preferred embodiments. A side of the coupling section 421 of the outer frame 42 away from the side wall section 422 is bent toward the main body portion 411 after bending. Extending and surrounding the back plate 41 to form a plate body 424 , the plate body 424 and the back plate 41 together form an accommodating space S. Thereby, the accommodating space S can be used to accommodate the electronic control components required for the display device such as the screen motherboard, the drive circuit motherboard, the power supply circuit and the logic board (TCON), and the outer frame 42 can directly serve as the display device at the same time. In addition, the assembly time of additional external appearance parts can also be reduced, so as to achieve technical effects such as reducing the number of parts, reducing the assembly time of parts, and reducing costs.

In this embodiment, each extending portion 412 of the back plate 41 has at least one first through hole 413 , and each combining section 421 of the outer frame 42 has at least one second through hole 425 , through which each locking unit 46 passes. The first through hole 413 and the second through hole 425 lock the back plate 41 with the outer frame 42 . Wherein, the coupling section 421 can be recessed to form a groove relative to each second through hole 425; on the other hand, each locking unit 46 includes a stud 461 coupled to the first through hole 413, A screw member 462 of the stud 461, and a head portion 463 disposed at one end of the screw member 462, the stud 461 is formed with an internal thread, the screw member 462 is directly screwed to the stud 461, and The head 463 of the screw element 462 can be sunk into the groove, and at the same time can be pressed on the coupling section 421, so that the coupling section 421 can be firmly and firmly attached to the extending portion 412, and At the same time, the utility model has the effect of improving the appearance beautification design of the display device.

Please refer to FIG. 10 , which is another implementation aspect of the preferred embodiment. The combining section 421 of the outer frame 42 and the extending portion 412 can be overlapped and combined with each other and surround the back plate 41 . In this embodiment, the display device may further include a structural board 5 . The structural board 5 includes a base portion 51 and at least one joint portion 52 extending from the base portion 51 and stacked on the inner side of the extending portion 412 . In this embodiment, the structural board 5 can be made of a metal material. The structural board 5 and the backplane 41 together form an accommodating space S, which can be used to prevent external electrical interference, thereby achieving the effect of reducing signal interference. , and the design of additionally adding a cover used in the prior art to block external electrical interference is reduced.

The extension portion 412 of the back plate 41 and the joint portion 52 of the structural plate 5 can be combined by bonding or screwing through the above-mentioned locking unit 46 . Specifically, when screwing is used for combination, each combination portion 52 of the structural plate 5 has at least one third through hole 53 corresponding to the corresponding first through hole 413 . Each locking unit 46 uses its stud 461 to pass through the first through hole 413 of the extension part 412 and the third through hole 53 of the joint part 52 in sequence, and then the screw element 462 directly penetrates Passing through the corresponding second through holes 425 of the connecting section 421 and screwing into the studs 461 , the connecting portion 52 of the structural plate 5 , the extending portion 412 of the back plate 41 and the outer frame 42 The coupling section 421 of the 10000 is screwed and fixed, so that the structural plate 5, the back plate 41 and the coupling section 421 together form the accommodating space S. Thereby, the accommodating space S can be used to accommodate the electronic control components required for the display device such as the screen motherboard, the drive circuit motherboard, the power supply circuit and the logic board (TCON), and the outer frame 42 can be directly used as the display device at the same time. The appearance of the device can greatly reduce the volume of the overall display device.

Please refer to FIGS. 11 a to 11 b , which are still another implementation of the preferred embodiment. The combining section 421 of the outer frame 42 and the extending portion 412 can be overlapped and combined with each other and surround the back plate 41 . In this embodiment, the display device may further include a cover plate assembly 6 , the cover plate assembly 6 has a glass back plate 61 and a plurality of side bars 62 that combine the glass back plate 61 with the extension portion 412 . Each side bar 62 includes a base portion 621 and a joint portion 622 extending from the base portion 621 and stacked on the inner side of the extending portion 412 . Please refer to FIG. 11 b , in this embodiment, the side bar 62 can be an L-shaped side bar, and for convenience of displaying the L-shaped side bar, the back panel 41 and the glass back panel 61 are omitted in FIG. 11 b . Wherein, the glass back plate 61 is abutted against the back surfaces of the plurality of bases 621, which can achieve the effect of enhancing the appearance of the display device.

The extension portion 412 of the back plate 41 and the joint portion 622 of the side bar 62 can be combined by adhesion or screwing through the locking unit 46 . Specifically, when screwing is adopted, the joint portion 622 of each side bar 62 has at least one third through hole 623 corresponding to the first through hole 413 , and each locking unit 46 uses its studs 461 to correspond to the corresponding first through holes 413 , respectively. through the extension part 412 and the third through hole 623 of the joint part 622 in sequence, and then the screw element 462 directly passes through the corresponding joint section 421 and is screwed into the stud 461, so that the plurality of The joint portion 622 of the side strip, the extension portion 412 of the back plate 41 and the joint portion 421 of the outer frame 42 are screwed and fixed, so that the glass back plate 61 and the glass back plate 61 are screwed together. The back plate 41 and the combining section 421 together form an accommodating space S. Thereby, the accommodating space S can be used to accommodate the electronic control components required for the display device such as the screen motherboard, the drive circuit motherboard, the power supply circuit and the logic board (TCON), and the outer frame 42 can directly serve as the display device at the same time. The appearance of the device can greatly reduce the volume of the overall display device. Furthermore, as shown in Figures 4, 6, 8-11, the joint sections 221, 321, and 421 are all designed without protrusions, so that the overall display device presents a square and non-embossed appearance, which is suitable for interior decoration. , The design has high compatibility and is not easy to appear obtrusive.

In other embodiments, as shown in FIG. 12 and FIG. 13 , the extension portion 412 of the back plate 41 extends continuously from one side of the body portion 411 toward the same direction as the extension direction of the body portion 411 . The combining section 421 of the outer frame 42 is bent and extended from one side of the side wall section 422 and is stacked on the extending portion 412 of the back panel 41 .

In this preferred embodiment, the joint position of the back plate 41 and the outer frame 42 is located on the back side or the outer side of the back plate 41 , so that the thickness of the frame of the display device of the present invention is only limited by the outer frame 42 . There is no avoidance means provided between the outer frame 42 and the optical unit 43 at the joint position of the back plate 41 and the outer frame 42 , so that the effect of a narrow frame can be achieved. In addition, this preferred embodiment is more suitable for being installed in an embedded device or used as an in-vehicle device, and the extension portion 412 and the combining section 421 can be used as a position to be combined with the embedded device or the in-vehicle device. shade.

Continuing from the above, the display device of the present invention adopts a variety of different ways to extend the joint position of the back plate and the outer frame to the outside or the back side of the back plate and the outer frame, so that the width of the frame can be effectively reduced, In accordance with the design of the narrow frame, the object of the present invention can indeed be achieved.

The embodiments disclosed above are only illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of implementation of the present invention. Anyone skilled in the art may not violate the Modifications and changes can be made to the above-described embodiments within the spirit and scope of the present invention. Any equivalent changes and modifications made by using the contents disclosed in the present invention should still be covered by the following claims.

21: Backplane

211: body part

212: Extensions

213: Bearing surface

214: Back

215: First Piercing

22: Outer frame

221: Combined segment

222: Side Wall Section

223: Bearer segment

224: Second Piercing

23: Optical unit

231: light guide plate

232: Optical film

24: Display panel

25: Adhesive layer

26: Locking unit

261: Stud

262: Screws

263: Head

Claims (14)

A frame structure that includes: a backplane including a body portion for carrying an optical unit, and at least one extension portion extending from the body portion; and an outer frame, comprising at least one combining section combined with the backboard, and a side wall section connecting the combining section and surrounding the optical unit, wherein the combining section and the extension of the backboard are overlapped and combined with each other, And the extension part does not extend between the side wall section and the optical unit. The frame structure of claim 1, wherein the body portion of the back plate has a bearing surface for supporting the optical unit, and a back surface opposite to the bearing surface, and the extension portion of the back plate is formed by the body portion Extending and abutting against the back of the main body, the combining section of the outer frame extends from the side wall section and is stacked on the extending portion of the back panel. The frame structure of claim 1, wherein the extension portion of the back plate extends continuously from the edge of the body portion and forms a step difference with the body portion, and a distance is formed between the extension portion and the optical unit, the The combining section of the outer frame is stacked on the extending portion of the back panel. The frame structure of claim 1, wherein the extension portion of the back panel extends from the body portion toward the same direction as the extension direction of the body portion, and the joint section of the outer frame extends from the side wall section and stacked on the extension portion of the backplane. The frame structure of claim 1, wherein the extension portion of the back panel extends from the body portion toward a direction different from the extension direction of the body portion, and the joint section of the outer frame extends from the side wall section and stacked on the extension portion of the backplane. The frame structure of claim 5, wherein the extension portion is formed by bending a side of the body portion to a side away from the optical unit and then extending, and the coupling section is away from one of the side wall sections The side is bent in the direction of the main body and then extended to surround the back plate to form a plate body, and the plate body and the back plate together form an accommodating space. The frame structure of claim 5, wherein the extension portion is formed by bending a side of the body portion to a side away from the optical unit and then extending, and the coupling section surrounds the back plate and is connected with the back plate. The back plate and a structural plate together form an accommodating space, and the structural plate includes a base portion and at least one joint portion extending from the base portion and stacked on the inner side of the extending portion. The frame structure of claim 5, wherein the extension portion is formed by bending a side of the body portion to a side away from the optical unit and then extending, and the coupling section surrounds the back plate and is connected with the back plate. The back plate and a glass back plate of a cover plate assembly together form an accommodating space, the cover plate assembly further has a plurality of side bars for combining the glass back plate with the extension portion, each side bar includes a base, and is formed by The base portion extends and is stacked on a joint portion inside the extension portion, and the glass back plate is abutted against the back surfaces of the plurality of base portions. The frame structure as claimed in any one of claims 1 to 8, wherein the extension portion of the back plate is bonded to the bonding section of the outer frame. The frame structure according to any one of claims 1 to 8, wherein the extension portion of the back plate has a first through hole, the joint section of the outer frame has a second through hole, and the frame structure further includes a through hole. A locking unit passing through the first through hole and the second through hole. The frame structure of claim 10, wherein the first through hole and the second through hole are formed with internal threads, and the locking unit includes a screw element screwed into the first through hole and the second through hole. The frame structure of claim 10, wherein the locking unit comprises a stud at least combined with the first through hole of the back plate, and a screw element screwed on the stud. A backlight module, comprising: a frame structure as described in any one of claims 1 to 12, and an optical unit disposed on the frame structure. A display device, comprising: a backlight module as claimed in claim 13, and a display panel located on a light-emitting side of the backlight module, wherein the outer frame includes a bearing section extending from the side wall section, the The display panel is arranged on the carrying section of the outer frame.

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