TW201414948A - Back plane and flat display device using the same - Google Patents

Abstract

A back plane and a flat display device using the same are provided. The back plane includes a bottom plate, at least one sidewall, at least one protrudent hook and at least one screw hole. The at least one sidewall and the bottom plate define a communication space. The protrudent hook is arranged on the sidewall, and served for fixing on an engagement portion of a first frame. The screw hole is installed on the protrudent hook, and served for providing a second frame fixed on the protrudent hook by a screw tightening through the screw hole.

Description

Backplane and flat display device using the same

The present invention relates to a back sheet, and more particularly to a back sheet for a flat display device.

In general, a conventional flat display device includes a display panel, a back panel, a plastic frame, and a front frame. The plastic frame and the back plate are mutually arranged with a plurality of matching fastening designs, and the fastening designs are spread over the side walls of the plastic frame and the back plate, so that the back plate is achieved by the engagement of the fastening design. The combination of the plastic frames allows the display panel to be sandwiched between the back plate and the plastic frame. In addition, by the locking method, after the front frame is closed to the plastic frame, the front frame can be locked on the back plate to tightly fix and protect the display panel therebetween.

However, since a plurality of the above-mentioned fastening design and the locking method are required to be separately formed on the side wall of the backboard, the components disposed in the backboard (including the components on the display panel) must be avoided under the trend of light weight and thinness of the product. The card design and the position of the locking hole limit the design space of the corresponding position, and the component configuration of more options cannot be provided. In addition, due to the plurality of fastening designs and holes respectively disposed on the sidewalls of the backboard, the structural strength of the backboard is thus weakened, thereby causing deformation or breakage during the locking and locking, thereby increasing the cost of more remaking. Furthermore, the above-mentioned fastening design and the hole in the locking manner are complicated by the manufacturing process, and the processing cost is increased.

For this reason, if a design of a flat display device can be provided, the above needs can be solved, and the industry stands out from the competition, which is an important issue to be solved urgently.

The present invention discloses a backplane and a flat display device using the backplane. The fixing structure and the locking hole for fixing the plastic frame and the front frame to the back panel are disposed in the same position on the backboard. In this way, the number of the locking design and the locking hole on the conventional back plate is reduced, thereby achieving space saving and design purposes, strengthening the structural strength of the backing plate, and simplifying related manufacturing procedures, thereby reducing the processing cost.

In one embodiment of the present invention, a backplane and a flat display device using the backplane include a bottom panel, at least one first sidewall, at least one protruding hook and at least one screw perforation. The first side wall and the bottom plate together define an accommodating space. The protruding hook is located on the first side wall for engaging one of the engaging portions of the first frame with the protruding hook. The screw perforation is located on the protruding hook for attaching a second frame to the screw perforation through a screw lock. Specifically, the first frame may be a front frame or a plastic frame. The second frame has different first frames, and may be a front frame or a plastic frame.

In one variation of this embodiment, the protruding hook is integrally formed with the first side wall and embossed on the first side wall in a direction opposite to the accommodating space. The protruding hook comprises a single free end, and the end of the free end is for engaging the engaging portion of the first frame.

In another variation of this embodiment, the protruding hook is integrally formed with the first side wall and embossed on the first side wall in a direction opposite to the accommodating space. The protruding hook comprises two opposite free ends, wherein one end of the free end is for engaging the engaging portion of the first frame, and the end of the other free end is for abutting against the first frame or the second frame.

The flat display device provided by one embodiment of the embodiment includes a back plate, a display module, a plastic frame, a front frame and at least one bolt. The display module is placed in the accommodating space. The plastic frame is covered on the display module and the back plate, and includes at least one second sidewall and at least one slot. The notch is located on the second side wall and is disposed in alignment with the protruding hook to receive and engage the protruding hook. The front frame covers the plastic frame, the display module and the back plate, and includes at least one third side wall, at least one second bolt hole and at least one bolt. The third side wall directly contacts the protruding hook. The second bolt hole is located on the third side wall and is disposed in alignment with the first bolt perforation. The bolt passes through the second bolt perforation and the first bolt is perforated.

A flat display device provided by another embodiment of the embodiment includes a back plate, a display module, a plastic frame, a front frame and at least one bolt. The display module is placed in the accommodating space. The plastic frame is closed on the display module and the back plate, and includes at least one second sidewall and at least one third bolt through hole. The second side wall directly contacts the protruding hook. The third bolt hole is located on the second side wall and is disposed in alignment with the protruding hook. The front frame covers the plastic frame, the display module and the back plate, and includes at least one third side wall and at least one buckle. The buckle is located on the third side wall, is disposed in alignment with the protruding hook, and is engaged with the protruding hook. The bolt passes through the third bolt perforation and the first bolt is perforated.

A further embodiment of the embodiment provides a flat display device comprising a back panel, a display module, a plastic frame, a front frame and a plurality of bolts. The backboard includes a bottom plate, a plurality of first side walls, a plurality of protruding hooks and a plurality of first bolt holes. The first side wall and the bottom plate together define an accommodating space. The protruding hooks are spaced apart from each other on the first side walls. Each of the first bolt holes is located on one of the protruding hooks. Display module placed in the accommodating space Inside. The plastic frame is covered on the display module and the back plate, and includes a first frame, a plurality of second sidewalls and a plurality of openings. The first frame exposes the display module. The second sidewalls surround the backplane and the display module. The openings are spaced apart from each other on the second side walls. Each of the openings is disposed in alignment with each of the protruding hooks and is fixed to the protruding hook. The front frame is closed on the display module and the back plate, and includes a second frame, a plurality of third sidewalls and a plurality of fixing portions. The second frame exposes the display module. The third side walls surround the plastic frame, the back plate and the display module. The fixing portions are spaced apart from each other on the third side walls. Each fixing portion is disposed in alignment with each of the protruding hooks, and is fixed to one of the protruding hooks. Each bolt passes through at least one opening and is perforated with a first bolt.

In a variation of this other embodiment, each of the openings is a notch. Each of the protruding hooks is embossed on the first side wall in the direction of the opposite display module, and enters and is engaged in each slot for fixing the plastic frame to the back board. In addition, the first side wall directly contacts the protruding hooks in the notches, and each fixing part is a second bolt perforation aligned with a first bolt perforation, so that the bolt passes through the second bolt perforation and the first bolt perforation respectively. . In other variations, each of the protruding hooks includes one or two free ends, and the single free end contacts the inner wall of the notch or the two opposite free ends respectively contact the inner wall of the notch and the plastic frame.

In another variation of this alternative embodiment, each of the protruding hooks bulges on the first side wall in the direction opposite the display module. Each fixing portion is a buckle, and is integrally formed with the third side wall, and extends from one edge of the third side wall toward the corresponding protruding hook, and is engaged with the corresponding protruding hook. Further, each of the openings is a third bolt perforation. Each of the third bolts is aligned with a first bolt through hole, and each of the protruding hooks directly contacts the second side wall for the bolt to pass through the third bolt through hole and the first bolt. In other variations, each protruding hook package It has one or two free ends, one single free end contacts the buckle, or two opposite free ends respectively contact the buckle and the plastic frame.

In addition, the display module includes a backlight group and a liquid crystal panel on one side of the backlight group, or the display module includes an organic light emitting diode panel.

In summary, the present invention is configured by arranging the protruding hook, the opening and the fixing portion at the same position of the side wall of the backboard, the side wall of the plastic frame and the side wall of the front frame, so as to enlarge the hook between the hooks. The design space, in order to save space and design, strengthen the structural strength of the backboard and simplify related manufacturing procedures, thereby reducing processing costs.

The present invention will be apparent from the following description and the detailed description of the embodiments of the present invention, which may be modified and modified by the teachings of the present invention without departing from the invention. The spirit and scope.

Since the side wall of the conventional backboard is inconvenient and inconvenient, the backboard of the present invention is provided with at least one protruding hook and at least one screw hole on one side wall. The protruding hook can be engaged with one of the engaging portions of a first frame (for example, a front frame or a plastic frame). The screw perforation is located on the protruding hook, and is locked by a screw. The screw perforation can be fixed on the second frame of a different first frame (for example, a plastic frame or a front frame).

Therefore, the fixing design and the locking hole for fixing the plastic frame and the front frame to the back plate are arranged in the same position on the back plate, so as to reduce the locking design on the conventional back plate. The number of holes is locked, which saves space and design, strengthens the structural strength of the backboard, and simplifies the related system. Create procedures to reduce processing costs. In addition, on the side wall of the backboard, there is no need to arrange any screw holes for fixing the first frame or the second frame to the back plate between any two protruding hooks.

Please refer to Figure 1. FIG. 1 is an exploded perspective view of a flat display device 100 of the present invention.

In one embodiment of the present invention, the flat display device 100 includes at least a back plate 200, a display module 300, a bezel 400, a front frame 500, and a plurality of bolts 600.

The back plate 200 includes a bottom plate 210 and a plurality of first side walls 220. The bottom plate 210 is, for example, rectangular, and the first side walls 220 are respectively located at the side of the bottom plate 210 and extend toward the first direction D1 (eg, upward, FIG. 1), so that the bottom plate 210 and the first side walls 220 are commonly defined. An accommodation space 230 is provided. In addition, the backboard 200 further includes a plurality of protruding hooks 240. The protruding hooks 240 are disposed on the first side walls 220 spaced apart from each other, in other words, each of the first side walls 220 has at least one protruding hook 240. A first bolt perforation 270 is defined in each of the protruding hooks 240. The display module 300 is placed on the bottom plate 210 and located in the accommodating space 230 to be supported by the backboard 200.

Generally, the display module 300 is not limited to the type, such as a liquid crystal display module or an organic light emitting diode module. The liquid crystal display module includes a backlight group and a liquid crystal panel on one side of the backlight group.

The plastic frame 400 includes a first plate body 410, a first frame opening 420 and a plurality of second side walls 430. The second sidewalls 430 are respectively located on the side of the first plate 410 and extend in the second direction D2 (eg, downward, FIG. 1). The first frame port 420 is located in the first plate body 410. In addition, the plastic frame 400 further includes a plurality of Opening portion 440. The openings 440 are spaced apart from each other on the second sidewalls 430. In other words, each of the second sidewalls 430 has at least one opening 440, and the openings 440 respectively correspond to the protrusions on the first sidewall 220. The card hook 240 is set.

The front frame 500 includes a second plate body 510, a second frame port 520, and a plurality of third side walls 530. The third side walls 530 are located on the side of the second plate 510 and extend toward a second direction D2 (eg, downward, FIG. 1). The second frame port 520 is located in the second plate body 510. In addition, the front frame 500 further includes a plurality of fixing portions 540. The fixing portions 540 are spaced apart from each other on the third side walls 530. In other words, each of the third side walls 530 has at least one fixing portion 540, and the fixing portions 540 respectively correspond to the protruding portions on the first side wall 220. The hook 240 is set.

During assembly, the plastic frame 400 is covered with the back plate 200. At this time, the second side walls 430 collectively surround the first side wall 220 of the back plate 200 and the display module 300 in the accommodating space 230, and the convex portions. The display module 300 is fixed to the corresponding opening 440, so that the display module 300 is fixed between the bottom plate 210 and the plastic frame 400, and the display module 300 is exposed on the first frame 420. Then, the front frame 500 is attached to the plastic frame 400, the display module 300 and the back plate 200. At this time, the third side walls 530 collectively surround the display frame in the plastic frame 400, the back plate 200 and the accommodating space 230. The set 300 is further fixed to the corresponding protruding hooks 240 one by one, and then the bolt 600 is passed through each opening 440 and the corresponding first bolt through hole 270, so that the front frame 500 The frame 400 is firmly fixed to the back plate 200.

In summary, after assembly, due to the protruding hook, the opening and the fixing portion The alignment is located at the same position of the side wall of the backboard, the side wall of the plastic frame and the side wall of the front frame, so as to increase the design space in the accommodating space, thereby saving space and design, and strengthening the structural strength of the backboard. And simplify related manufacturing processes to reduce processing costs.

It should be noted that the protruding hook, the opening portion and the fixing portion disclosed in FIG. 1 are only arranged in a schematic alignment on the first side wall of the backboard, the second side wall of the plastic frame, and the third side wall of the front frame. In order to limit its shape, size and detailed position, the present invention will disclose changes in the implementation of the protruding hook, the opening and the fixing portion to further clarify the technical features of the present invention.

Please refer to Figure 2 and Figure 3A. FIG. 2 is a partial enlarged view of the flat display device 100 of the present invention in an embodiment after assembly. FIG. 3A is a partial enlarged view of the protruding hook 240 of the flat display device 100 of the present invention under a first variation.

In the protruding hooks 240, the protruding hooks 240 are integrally formed with the first side wall 220, and are bulged on the first side wall 220 in the direction of the opposite accommodating space 230 (ie, the display module 300), so as to be convex. The card hook 240 has one outer side surface 241 of the first bolt through hole 270 and is not at the same level as the first side wall 220. In addition, each of the protruding hooks 240 is located above the first side wall 220 and between the lower side edges 221 and 222. In other words, the upper side edge 221 of the first side wall 220 is maintained at a distance G from each of the protruding hooks 240.

The protruding hook 240 includes a first free end 250, and the first free end 250 is located at one end of the protruding hook 240 extending in the second direction D2 (eg, downward, FIG. 1). The first free end 250 The end face is for abutting against the plastic frame 400 and the front frame 500.

Please refer to Figure 1 and Figure 3B. Figure 3B shows the second figure According to a first variation and a cross-sectional view along the I-I section line.

In this variation, the opening portions 440 are respectively a notch 450, and the notch 450 is sized to enter the protruding hook 240, and the notch 450 includes a plurality of surrounding inner walls 451. Each fixing portion 540 is a second bolt through hole 550 that is aligned with the first bolt through hole 270.

Therefore, when the plastic frame 400 and the back plate 200 are covered, the upper edge 221 of each of the first side walls 220 of the back plate 200 abuts against the plastic frame 400, and each protruding hook 240 enters the notch 450, and The end of the first free end 250 of each of the protruding hooks 240 is abutted by the lower inner wall 451 of the notch 450 for the plastic frame 400 to be fixed to the back plate 200 on.

When the current frame 500 is covered on the plastic frame 400, the display module 300 and the back plate 200, the third side wall 530 of the front frame 500 directly contacts the outer side surface 241 of the protruding hook 240 in each notch 450, so that The second bolt holes 550 are respectively aligned with the corresponding first bolt holes 270, so that the bolts 600 pass through the second bolt holes 550 and the first bolt holes 270 for the front frame 500 to be fixed to the back plate 200.

In addition, the third sidewall 530 is provided with a first recess 551 at a periphery of the second bolt through hole 550. Therefore, the nut 601 of the bolt 600 can be received in the first recess portion 551 such that the nut 601 does not protrude outside the first recess portion 551.

Please refer to Figure 2 and Figure 4A. FIG. 4A is a partial enlarged view of the protruding hook 240A of the flat display device 100 of the present invention under a second variation. In the protruding hooks 240A, the protruding hooks 240A are integrally formed with the first side wall 220, and are bulged on the first side wall 220 in the direction of the opposite accommodating space 230 (ie, the display module 300), so as to be convex. Card hook 240A One of the outer side surfaces 241 of the first bolt through hole 270 is not at the same level as the first side wall 220. In addition, each of the protruding hooks 240A is located on the upper side edge 221 of the first side wall 220, in other words, there is no space between the upper side edge 221 of the first side wall 220 and each of the protruding hooks 240A.

The protruding hook 240A includes two opposite first and second free ends 250 and 260. The first free end 250 is located at the protruding hook 240A in the second direction D2 (eg, downward, FIG. 1) An end of the first free end 250 for abutting against the plastic frame 400 and the front frame 500, the second free end 260 is located at the upper edge 221 of the protruding hook 240, the second free end 260 The end face is for abutting against the plastic frame 400.

Please refer to Figure 2 and Figure 4B. FIG. 4B is a perspective cross-sectional view along line II-I of FIG. 2 according to a second variation. FIG.

Another variation of FIG. 4B is substantially the same as that of FIG. 4A. However, when the plastic frame 400 is covered with the back plate 200, the end faces of the second free ends 260 of the respective protruding hooks 240A are collectively abutted against the bezel 400.

Please refer to Figure 5 and Figure 6A. FIG. 5 is a partially enlarged view showing another embodiment of the flat display device 100 of the present invention after assembly. FIG. 6A is a perspective cross-sectional view taken along line II-II of FIG. 5 according to the first variation of FIG. 3A.

In this variation, the opening portion 440 (Fig. 1) is a third bolt perforation 460 that is aligned with the first bolt perforation 270. The fixing portion 540 (Fig. 1) is a buckle 560 that is aligned with the protruding hook 240. The third side wall 530 includes a plurality of recessed grooves 570, and each of the buckles 560 and the third side wall 530 are integrally formed. In each of the recessed grooves 570, the lower edge of the third side wall 530 is obliquely directed toward the corresponding protruding hook 240. Extending so as to engage with the corresponding protruding hooks 240.

Therefore, when the plastic frame 400 and the back plate 200 are covered, the third bolt holes 460 are respectively aligned with the corresponding first bolt holes 270, so that the bolts 600 pass through the third bolt holes 460 and the first bolts are pierced. 270, the plastic frame 400 can be fixed to the backboard 200 by this. In addition, when the plastic frame 400 and the back plate 200 are covered, the upper edge 221 of each of the first side walls 220 of the back plate 200 also abuts against the plastic frame 400, and the protruding hooks 240 directly contact the plastic frame 400. The second side wall 430.

The third side wall 530 of the front frame 500 directly contacts the second side wall 430 of the plastic frame 400, and the protruding hooks 240 are attached to the frame 400, the display module 300, and the back plate 200. The end faces of the first free ends 250 are respectively abutted by the buckles 560 for the front frame 500 to be fixed to the backboard 200.

In addition, the second sidewall 430 is provided with a second recess 461 at a periphery of the third bolt through hole 460. Therefore, the nut 601 of the bolt 600 can be received in the second recess portion 461 such that the nut 601 does not protrude beyond the second recess portion 461.

Please refer to Figure 5 and Figure 6B. 6B is a perspective cross-sectional view taken along line II-II of FIG. 5 according to a second variation of FIG. 4A.

The other change of FIG. 6B is substantially the same as that of FIG. 6A. However, when the plastic frame 400 is covered with the back plate 200, the end faces of the second free ends 260 of the respective protruding hooks 240A are collectively abutted against the plastic frame 400.

In summary, the present invention is configured by arranging the protruding hook, the opening and the fixing portion at the same position of the side wall of the backboard, the side wall of the plastic frame and the side wall of the front frame, so as to enlarge the hook between the hooks. The design space, in order to save space and design, strengthen the structural strength of the backboard and simplify related manufacturing procedures, thereby reducing processing costs.

The present invention is not limited to the embodiments of the present invention, and various modifications and refinements may be made without departing from the spirit and scope of the present invention. This is subject to the definition of the scope of the patent application.

100‧‧‧Flat display device

200‧‧‧ Backplane

210‧‧‧floor

220‧‧‧First side wall

221, 222‧‧‧ above and below the first side wall

230‧‧‧ accommodating space

240, 240A‧‧‧ protruding hook

241‧‧‧Outside

250‧‧‧First free end

260‧‧‧ second free end

270‧‧‧First bolt piercing

300‧‧‧ display module

400‧‧‧ plastic frame

410‧‧‧First board

420‧‧‧ first frame

430‧‧‧second side wall

440‧‧‧ openings

450‧‧‧ notch

451‧‧‧ inner wall

460‧‧‧ Third bolt piercing

461‧‧‧Second depression

500‧‧‧ front box

510‧‧‧Second plate

520‧‧‧ second frame

530‧‧‧ third side wall

540‧‧‧ Fixed Department

550‧‧‧Second bolt piercing

551‧‧‧The first depression

560‧‧‧ buckle

570‧‧‧recessed trough

600‧‧‧ bolt

601‧‧‧ nuts

D1‧‧‧ first direction

D2‧‧‧ second direction

G‧‧‧Distance

I-I, II-II‧‧‧ hatching

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

FIG. 2 is a partially enlarged view showing an embodiment of the flat display device of the present invention after being assembled.

FIG. 3A is a partial enlarged view of the protruding hook of the flat display device of the present invention under a first variation.

FIG. 3B is a perspective cross-sectional view taken along line I-I of FIG. 2 according to the first variation.

FIG. 4A is a partial enlarged view of the protruding hook of the flat display device of the present invention under a second variation.

FIG. 4B is a perspective cross-sectional view along line II-I of FIG. 2 according to a second variation. FIG.

FIG. 5 is a partially enlarged view showing another embodiment of the flat display device of the present invention after assembly.

FIG. 6A is a perspective cross-sectional view taken along line II-II of FIG. 5 according to the first variation of FIG. 3A.

6B is a perspective cross-sectional view taken along line II-II of FIG. 5 according to a second variation of FIG. 4A.

100‧‧‧Flat display device

200‧‧‧ Backplane

210‧‧‧floor

220‧‧‧First side wall

221, 222‧‧‧ above and below the first side wall

230‧‧‧ accommodating space

240‧‧‧ protruding hook

270‧‧‧First bolt piercing

300‧‧‧ display module

400‧‧‧ plastic frame

410‧‧‧First board

420‧‧‧ first frame

430‧‧‧second side wall

440‧‧‧ openings

500‧‧‧ front box

510‧‧‧Second plate

520‧‧‧ second frame

530‧‧‧ third side wall

540‧‧‧Fixed Department

600‧‧‧ bolt

D1‧‧‧ first direction

D2‧‧‧ second direction

Claims (23)

A backplane includes: a bottom plate; at least one first side wall defines a receiving space together with the bottom plate; at least one protruding hook is located on the first side wall for one card of the first frame The joint is fastened to the protruding hook; and at least one screw hole is located on the protruding hook for attaching a second frame to the screw hole through a screw lock. The backplane of claim 1, wherein one of the first frame and the second frame is a front frame, and the other of the first frame and the second frame is a plastic frame. The backing plate of claim 1, wherein the protruding hook is integrally formed with the first side wall, and is raised on the first side wall in a direction opposite to the accommodating space, the protruding hook comprises a free end The end surface of the free end is for engaging the engaging portion of the first frame. The backplane of claim 3, wherein the protruding hook further comprises another free end, the other free end is disposed opposite the free end, and the end surface thereof is for abutting against the first frame or the second framework. A flat display device comprising: a backplane as claimed in any one of claims 1 to 4; a display module disposed in the accommodating space; a plastic frame, which is disposed on the display module and the back plate, and includes: at least one second side wall; and at least one notch disposed on the second side wall and disposed in alignment with the protruding hook The front frame is attached to the plastic frame, the display module and the back plate, and includes: at least one third side wall directly contacting the protruding hook; at least one a second bolt perforation, located on the third side wall, disposed in alignment with the first bolt perforation; and at least one bolt passing through the second bolt perforation and the first bolt perforation. The flat display device of claim 5, wherein the third side wall is provided with a first recessed portion at a periphery of the second bolt through hole, and a nut of the bolt is received in the first recessed portion, so that the nut is not Protruding outside the first recess. The flat display device of claim 5, wherein the end surface of the free end of the protruding hook abuts against an inner wall of the slot. The flat display device of claim 7, wherein an end surface of the other free end of the protruding hook abuts against the plastic frame. A flat display device comprising: a backplane as claimed in any one of claims 1 to 4; a display module disposed in the accommodating space; a plastic frame, which is disposed on the display module and the back plate, and includes: at least one second sidewall directly contacting the protruding hook; and at least one third bolt through hole on the second sidewall, and The front frame is disposed on the plastic frame, the display module and the back plate, and includes: at least one third side wall; at least one buckle is disposed on the third side wall And aligning with the protruding hook and engaging with the protruding hook; and at least one bolt passing through the third bolt and the first bolt is perforated. The flat display device of claim 9, wherein the second sidewall is provided with a second recess at a periphery of the third bolt through hole, and a nut of the bolt is received in the second recess so that the nut is not Protruding outside the second recess. The flat display device of claim 9, wherein the buckle is integrally formed with the third side wall, and extends from an edge of the third side wall toward the protruding hook to match the protruding hook Engage. The flat display device of claim 11, wherein the end surface of the free end of the protruding hook abuts against an end surface of the buckle. The flat display device of claim 12, wherein an end surface of the other free end of the protruding hook abuts against the plastic frame. A flat display device comprising: a back plate, comprising: a bottom plate; a plurality of first side walls defining a receiving space together with the bottom plate; and a plurality of protruding hooks spaced apart from each other on the first side walls And a plurality of first bolt perforations, each of the first bolt holes being located on one of the protruding hooks; a display module disposed in the receiving space of the backboard; a plastic frame, The display module is clamped to the back panel, and includes: a first frame opening to expose the display module; a plurality of second sidewalls surrounding the back panel and the display module; and a plurality of openings spaced apart from each other Provided on the second side walls, each of the openings is disposed in alignment with one of the protruding hooks, and is fixed on one of the protruding hooks; a front frame is covered The display module and the backplane include: a second frame to expose the display module; and a plurality of third sidewalls surrounding the plastic frame, the back panel and the display module; and a plurality of fixing portions Separating from each other on the third side walls, each of the fixing portions and the convex portion a hook is disposed in alignment and fixed to one of the protruding hooks; and a plurality of bolts, each of the bolts passing through at least one of the openings and one of the first bolts . The flat display device of claim 14, wherein each of the openings is a notch, and each of the protruding hooks bulges on the first side wall in a direction opposite to the display module, and enters And engaging in one of the slots for fixing the plastic frame to the backboard. The flat display device of claim 15, wherein the third side wall directly contacts the protruding hooks in each of the notches, and each of the fixing portions is aligned with one of the first bolt holes. The second bolt is perforated for the bolts to pass through the second bolt holes and the first bolt holes. The flat display device of claim 16, wherein the third sidewall is provided with a first recess at a periphery of each of the second bolt holes, and one of the bolts is received in the first recess. In one of the portions, each of the bolts does not protrude outside the corresponding first recess. The flat display device of claim 16, wherein each of the protruding hooks comprises at least one free end, wherein the free end abuts against the inner wall of the slot, or the two oppositely disposed free ends respectively The inner wall of the notch is pressed against the plastic frame. The flat display device of claim 14, wherein each of the protruding hooks is embossed on the first side wall in a direction opposite to the display module, and each of the fixing portions is a buckle, each of the Some buckles with the third side The wall is integrally formed, and extends from one edge of the third side wall toward the corresponding protruding hook and engages with the corresponding protruding hook. The flat display device of claim 19, wherein each of the openings is a third bolt perforation, and each of the third bolt perforations is aligned with one of the first bolt perforations, and the protruding cards are The hook directly contacts the second side wall for the bolt to pass through the third bolt through hole and the first bolt is perforated. The flat display device of claim 19, wherein each of the protruding hooks comprises at least one free end, wherein the free end abuts the buckle, or the two oppositely disposed free ends respectively abut The buckle is with the plastic frame. The flat display device of claim 14, wherein the display module comprises a backlight group and a liquid crystal panel on a side of the backlight group. The flat display device of claim 14, wherein the display module comprises an organic light emitting diode panel.