WO2019071987A1 - LIQUID CRYSTAL DISPLAY EQUIPMENT - Google Patents

Abstract

Disclosed in the application is liquid crystal display equipment, which comprises: a shell, an optical film set and a display screen, wherein the shell comprises a backboard, the backboard comprises a board body and two side boards arranged on the two opposite side edges of the board body respectively, and side partition boards which extend corresponding to the side edges are arranged on the inner side surfaces of the two side boards respectively. Two opposite sliding grooves are defined by the board body, the two side boards and the two side partition boards. The optical film set is slidingly installed in the two sliding grooves, and the display screen is arranged opposite to the optical film set and fixedly arranged on the front side surfaces of the side partition boards.

Description

 Liquid crystal display device

Technical field

The present application relates to the field of display devices, and in particular, to a liquid crystal display device.

Background technique

At present, for the common liquid crystal display devices (such as liquid crystal displays, liquid crystal televisions, mobile phones, tablet computers, etc.) on the market, the fixed optical die set and the liquid crystal glass usually include a plastic frame. A slot is formed on the frame for inserting the optical die set, and a support structure is formed on the frame to support the liquid crystal glass. However, the setting of the plastic frame makes the overall thickness of the liquid crystal display device large, and it is difficult to realize an ultra-thin design.

Application content

The main purpose of the present application is to propose a liquid crystal display device, which aims to realize an ultra-thin ultra-narrow bezel design of a liquid crystal display device.

To achieve the above objective, the liquid crystal display device proposed by the present application includes:

a housing, the housing includes a backboard, the backboard includes a board body, and two side plates disposed on opposite sides of the board body, and the inner sides of the side boards are respectively provided with corresponding a laterally extending side partition, the plate body, the two side plates and the two side partitions together define two opposite sliding grooves;

An optical die set slidably mounted to the two of the chutes; and

A display screen is disposed opposite to the optical die set and is fixed to a front side of the side spacer.

Optionally, the rear side surface of the side partition plate is provided with a limiting convex portion, and the limiting convex portion is pressed against the optical die set.

Optionally, the front side of the side panel protrudes from the side partition to form a rib on both sides of the display screen.

Optionally, the display screen is bonded to the side partition.

Optionally, the back plate is a sheet metal member, and the side partition plate is formed by bending a front side of the side plate body.

Optionally, the plate body is arched rearward to form a mounting cavity for mounting the light source of the liquid crystal display device on the inner side of the plate body.

Optionally, the backboard further includes a top plate body disposed on a top edge of the board body, and a bottom edge of the board body is vacant to form an optical die between the lower ends of the two sliding slots. The group slides into the installation port of the installation;

The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body.

Optionally, the inner side of the top plate body is provided with a top partition, the top partition is opposite to the plate body, and the top partition, the plate body and the top plate body are collectively restricted along the a limiting slot extending in the longitudinal direction of the top plate body, and a top of the optical die set abuts against a groove bottom of the limiting slot.

Optionally, the bottom of the slot of the limiting slot is further provided with a cushion, and the top of the optical die set abuts against the cushion.

Optionally, the housing further includes a closure assembly that closes the decorative opening, the closure assembly being secured to the backing plate.

Optionally, the sealing assembly includes a positioning component, the positioning component includes a positioning substrate, and a positioning side plate and a mounting plate disposed on two sides of the positioning substrate, the positioning substrate is located at a bottom of the optical die set And extending along a bottom of the optical die set, the positioning side plate is located at a front side of the optical die set, and a rear positioning convex portion is provided on a rear side of the positioning side plate, the optical die The lower end of the group is correspondingly provided with a positioning hole for inserting the rear positioning convex portion; the mounting plate is located at a rear side of the optical die set and fixed to the plate body.

Optionally, the back surface of the positioning side plate is provided with a pressing convex portion, and the pressing convex portion is pressed against the front side surface of the optical die set.

Optionally, the front side surface of the positioning side panel is further provided with a front positioning convex portion, and a bottom of the display screen abuts the front positioning convex portion.

Optionally, the sealing assembly further includes a decorative frame strip located outside the positioning member, the decorative frame strip includes a decorative bottom plate, and a decorative side plate disposed on a front side of the decorative bottom plate, the decorative bottom plate and the The positioning substrate is fixed, and the rear side of the decorative bottom plate is at least covered to the bottom edge of the plate body, the decorative side plate is spaced apart from the positioning side plate, and the bottom of the display screen is located at the decoration Between the side panel and the positioning side panel.

Optionally, the inner side surface of the decorative side panel is provided with a stop protrusion, and the stop protrusion abuts the front side of the display screen.

In the present application, a side partition plate is disposed on the back plate, and a sliding groove for slidingly mounting the optical die set is formed between the side partition plate and the plate body of the back plate, and the side partition plate is used instead of the plastic frame to support the display screen. Because there is no need to additionally set the plastic frame to support the display screen, it is beneficial to realize the ultra-thin and ultra-narrow bezel design of the housing.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the structures shown in the drawings without any creative work for those skilled in the art.

1 is a schematic exploded view of a back view of an embodiment of a liquid crystal display device of the present application;

Figure 2 is a cross-sectional view of the liquid crystal display device of Figure 1 taken along A-A and near the left side;

Figure 3 is a cross-sectional view of the liquid crystal display device of Figure 1 taken along B-B and near the top;

Figure 4 is a cross-sectional view of the liquid crystal display device of Figure 1 taken along C-C and near the bottom;

Figure 5 is a cross-sectional view of the liquid crystal display device of Figure 1 along D-D and near the bottom;

6 is a schematic view showing the assembly of the reflective sheet and the back sheet in the cutting direction of the liquid crystal display device of FIG. 1 along B-B;

Figure 7 is a schematic view of the assembly after the assembly step of Figure 6;

Figure 8 is a schematic view of the assembly after the assembly step of Figure 7;

Figure 9 is a schematic view of the assembly after the assembly step of Figure 8.

Description of the reference numerals:

Label name Label name 10 Backplane 30 Display 11 Board body 40 Positioning member 12 Side plate 41 Positioning substrate 13 Side partition 42 Positioning side panel 131 Limiting convex 421 Rear positioning convex 14 Roof body 422 Pressing the convex part 15 Top partition 423 Front positioning convex 16 Chute 43 Mounting plate 20 Optical die set 50 Decorative frame twenty one A reflective sheet 51 Decorative floor twenty two Light guide 52 Decorative side panel twenty three DOP diaphragm 53 Stop projection twenty four Positioning hole 60 Cushion

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present application, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is used for descriptive purposes only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.

The application proposes a liquid crystal display device.

Referring to FIG. 1 and FIG. 2, in an embodiment of the present application, the liquid crystal display device includes:

a housing, the housing includes a backboard 10, the backboard 10 includes a panel body 11, and two side panels 12 disposed on opposite sides of the panel body 11, and inner sides of the two side panels 12 Each side of the side is provided with a side partition 13 extending corresponding to the side, the plate body 11, the two side plates 12 and the two side partitions 13 together define two opposite sliding grooves 16;

An optical die set 20 slidably mounted to the two of the chutes 16;

The display screen 30 is disposed opposite to the optical die set 20 and is fixed to the front side of the side spacer 13.

Without loss of generality, in the present embodiment, the optical die set 20 includes a reflective sheet 21, a light guide plate 22, and other optical films (such as the DOP film 23); and the display screen 30 generally employs an LCD screen.

In this embodiment, the plate body 11, the two side plates 12 and the side partitions 13 are integrally formed to facilitate mass production of the casing. In addition, in this embodiment, the side partition plate 13 is disposed as a unitary plate member extending along the corresponding side edges. It can be understood that the display screen 30 and the optical die set 20 are disposed on the front and rear sides of the side partition plate 13; In other embodiments, the side partitions 13 may also include a plurality of plate members intermittently disposed in the extending direction of the corresponding side edges, so that the partitioning action can also be achieved.

It should be noted that, in the technical solution of the present application, the optical die set 20 and the sliding slot 16 may be an adapted sliding assembly, that is, the sliding between the optical die set 20 and the sliding slot 16 has no gap. It may also be a sliding assembly of the gap, that is, the sliding between the optical die set 20 and the chute 16 may have a gap.

It will be appreciated that the arrangement of the side partitions 13 may provide attachment and support for the assembly of the display screen 30 and the optical die set 20 on the support frame. Specifically, referring to FIG. 6, FIG. 8, and FIG. 9, when the display screen 30 and the optical die set 20 are assembled, the reflective sheet 21 of the optical die set 20 is first loaded into the inner side of the panel body 11 from the rear to the rear, and then The remaining other die of the optical die set (such as the light guide plate 22 and the DOP film 23) are slidably mounted into the two chutes 16 to mount the optical die set to the housing; then the display screen 30 is from the front It is placed directly on the front side of the side partition 13 and the display screen 30 is fixed to the side partition 13. In this embodiment, the display screen 30 and the optical die set 20 can be fixed on the side partition 13 or the side panel 12. Specifically, the display screen 30 can be adhesively fixed to the side partition 13 and used for bonding. The material may be a viscous adhesive or a double-sided adhesive, which is not limited in this application.

In the present application, by providing a side partition 13 on the back plate 10, a sliding groove 16 for slidingly mounting the optical die set is formed between the side partition 13 and the plate body 11 of the back plate 10, and the side partition 13 is replaced. The plastic frame is used to support the display screen 30. Since there is no need to additionally provide a plastic frame for supporting the display screen 30, the ultra-thin ultra-narrow bezel design of the housing is facilitated.

Referring to FIG. 2 again, in the embodiment, the rear side surface of the side partition plate 13 is provided with a limiting convex portion 131, and the limiting convex portion 131 is pressed against the optical die set. In this embodiment, the limiting protrusion 131 may be formed by adding a surface material to the rear side of the side partition 13; of course, in other embodiments, the limiting protrusion 131 may be rearward from the front side of the side partition 13 The recess is formed at the rear side of the side partition 13 and at a position corresponding to the recess. The limiting protrusions 131 preferably extend along the side partitions 13 to form an elongated strip to better abut the optical die sets to prevent the optical die sets from sliding down. Of course, in other embodiments, the limiting protrusions 131 may include a plurality of protrusions that are intermittently disposed in the extending direction of the corresponding side partitions 13. Thus, the limiting action can also be achieved.

Referring to FIG. 3, in the embodiment, the backboard 10 further includes a top plate body 14 disposed on a top edge of the board body 11, and the bottom side of the board body 11 is vacant for two Between the lower ends of the chutes 16, a mounting port for sliding the optical die set into the mounting is formed. The optical die set slides into the housing from the mounting opening until the top of the optical die set abuts the top plate body 14. In this embodiment, the top plate body 14 is a part of the back plate 10 and is integrally formed with the back plate 10 to facilitate mass production of the casing, and is advantageous for reducing the arrangement of the connecting members such as screws, and realizing the ultra-thin super-shell of the casing. Narrow border design. Without loss of generality, on the housing, generally, the two ends of the top plate body 14 are respectively connected to the top ends of the side plates. It can be understood that, in this embodiment, the overall sliding assembly direction of the optical die set is from the bottom edge of the back plate 10 toward the top edge, and the top plate body 14 is disposed to avoid the optical die set during the overall sliding assembly process. The phenomenon of sliding out of the top edge of the backboard 10 appears. However, the present design is not limited thereto. In other embodiments, the mounting opening of the housing may also be formed at the top end of the housing, so that the overall sliding assembly direction of the display module is from the top edge of the back panel 10 toward the bottom edge. For example, but not limited to, the bottom edge and the top edge of the back plate 10 are vacant to form a mounting opening between the lower ends of the two sliding slots 16 and a decorative opening between the upper ends of the two sliding slots 16 The die set can be slid into the housing from either the mounting port and the trim opening.

In this embodiment, the inner side surface of the top plate body 14 is provided with a top partition plate 15 opposite to the plate body 11, the top partition plate 15, the plate body 11 and the top plate The body 14 collectively limits the limiting slot extending along the length of the top plate body 14. The top of the optical die set abuts against the groove bottom of the limiting slot, so that, on the one hand, the top partition 15 can be passed. The auxiliary increase prevents the optical die set from being released from the housing, and on the other hand, maintains the appearance consistency of the top and both sides of the front side of the housing. Similarly, the top partition 15 is also a part of the backing plate 10 and is integrally formed with the top plate body 14.

The rear side surface of the top partition 15 is also provided with a limiting convex portion 131, and the limiting convex portion 131 is pressed against the optical mold set. In this embodiment, the limiting protrusion 131 may be formed by adding a surface material to the rear side of the top partition 15; of course, in other embodiments, the limiting protrusion 131 may be rearward from the front side of the top partition 15. The recess is formed at the rear side of the top partition 15 and at a position corresponding to the recess.

Further, a cushion pad 60 is further disposed at the bottom of the slot of the limiting slot, and the top of the optical die set abuts against the cushion 60. Since the optical die set is in the process of being inflated due to heat, by providing the cushion 60 on the top of the optical die set, the optical film set is expanded to press the cushion 60, and the cushion 60 is an optical mode. The set of sheets provides a deformed buffer space to prevent the optical die set from directly contacting the top plate body 14 and being crushed and destroyed.

In this embodiment, the front side of the side panel 12 protrudes from the side partition 13 to form a rib on both sides of the display screen 30, so as to prevent the two side edges of the display screen 30 from being exposed. At the same time, the display screen 30 can be limited to prevent the display screen 30 from moving along both sides. Similarly, the front side of the top plate body 14 protrudes from the top partition 15 to form a rib at the top of the display screen 30. Of course, in other embodiments, the front side of the side panel 12 may be flush with the side partitions 13, and the front side of the top panel 14 may also be flush with the top partition 15.

In this embodiment, the back plate 10 is a sheet metal member, and the side partition plate 13 is formed by bending the front side of the side plate body 12; likewise, the top partition plate 15 is formed by the top plate body 14 The front side is formed by bending, which is advantageous for forming.

The liquid crystal display device in the present application may be of a direct type or a side type. For example, in the present embodiment, the liquid crystal display device is of a direct type, and the plate body is arched rearward to form a mounting cavity for mounting the light source of the liquid crystal display device on the inner side surface of the plate body.

Referring to Figures 1, 4 and 5, further, the liquid crystal display device further includes a closure assembly that closes the mounting opening, the closure assembly being secured to the backing plate 10 to confine the optical die set within the housing. It should be noted that, in the technical solution that the bottom edge and the top edge of the backplane 10 are vacant, in order to prevent the optical module group from being exposed from the upper and lower ends, the appearance of the liquid crystal display device is affected, optionally, A sealing component is disposed at the mounting opening of the upper and lower ends of the liquid crystal display device, and the two sealing components respectively close the mounting opening of the upper and lower ends. The sealing component may be a decorative film member or a top decorative frame strip 50 as long as the mounting opening can be closed.

In this embodiment, the sealing component includes a positioning component 40. The positioning component 40 includes a positioning substrate 41, and a positioning side plate 42 and a mounting plate 43 disposed on two sides of the positioning substrate 41. The positioning substrate 41 is located. a bottom portion of the optical die set extending along a bottom of the optical die set, the positioning side plate 42 is located at a front side of the optical die set, and a rear side of the positioning side plate 42 is disposed a rear positioning convex portion 421, the lower end of the optical mold set is correspondingly provided with a positioning hole 24 for inserting the rear positioning convex portion 421; the mounting plate 43 is located at a rear side of the optical mold group, and The plate body 11 is fixed. In the present embodiment, the mounting plate 43 is preferably fixed to the plate body 11 by screws; of course, in other embodiments, the mounting plate 43 can also be engaged or welded with the plate body 11. In this embodiment, the rear positioning convex portion 421 may include a plurality of protrusions intermittently disposed in the extending direction of the corresponding positioning side plate 42; of course, in other embodiments, the rear positioning convex portion 421 may extend along the positioning side plate 42. The direction forms a long strip to better abut the optical die set to prevent the optical die set from sliding down. In this embodiment, the positioning side plate 42 is provided with a through hole, and a positioning plate is disposed on the hole wall of the through hole. The positioning plate and the positioning side plate 42 are integrally formed, and the front positioning convex is formed by pressing the positioning plate backward. Department 423.

In this embodiment, since the mounting plate 43 and the positioning side plate 42 are respectively disposed on the front and rear sides of the positioning substrate 41, the mounting plate 43 and the positioning side plate 42 and the positioning substrate 41 form an opening with an opening inward. The groove, the lower end of the optical die set extends into the groove. At the same time, since the rear positioning convex portion 421 is provided on the rear side surface of the positioning side plate 42, the rear positioning convex portion 421 abuts against the top optical film group, thereby preventing the optical mold group from sliding downward from the sliding groove 16.

Further, the rear side surface of the positioning side plate 42 is provided with a pressing convex portion 422, and the pressing convex portion 422 is pressed against the front side of the optical die set 20 to perform the lower end of the optical die set. Limiting to prevent the lower end of the optical die set from tilting forward.

Further, the front side surface of the positioning side plate 42 is further provided with a front positioning convex portion 423, and the bottom of the display screen 30 abuts against the front positioning convex portion 423. In this embodiment, the front positioning convex portion 423 may include a plurality of protrusions intermittently disposed in the extending direction of the corresponding positioning side plate 42; of course, in other embodiments, the front positioning convex portion 423 may extend along the positioning side plate 42. The direction forms a long strip to better abut the display screen 30 to prevent the display screen 30 from sliding down. In this embodiment, the positioning member 40 is a sheet metal member, and the positioning side plate 42 is provided with a through hole, and a positioning plate is disposed on the hole wall of the through hole, and the positioning plate and the positioning side plate 42 are integrally formed by the positioning plate. The front positioning convex portion 423 is formed by bending forward.

The mounting plate 43 is disposed in conformity with the inner side surface of the panel body 11 to reduce the thickness of the housing. The inner side surface of the plate body 11 is recessed rearward at a position close to the lower end, and a seating space for the mounting plate 43 is disposed on the inner side surface of the plate body 11 to prevent the mounting plate 43 from interfering with the optical pattern group.

In the present application, when the liquid crystal display device is in the side-entry type, the light source may be disposed between the sealing member and the bottom edge of the light guide plate 22, and the front surface of the light source faces the bottom edge of the light guide plate 22 to cause backlight light emitted therefrom. The light guide plate 22 is entered; the back surface of the light source is attached to the sealing assembly to dissipate heat through the sealing assembly. In other embodiments, the light source may be disposed on the inner side of the top plate body 14 such that the backlight light emitted from the top surface of the top plate body 14 is incident from the top edge of the light guide plate 22. It is understood that, in this case, the power supply wire for powering the light source needs to be Extends to the top of the housing. It should be noted that, in the solution in which the light source is disposed at the bottom of the light guide plate 22, the light source is located between the positioning substrate 41 and the bottom edge of the light guide plate 22, and the light source is fixed to the positioning substrate 41. The positioning substrate 41 is preferably made of a metal member to dissipate heat from the light source, thereby achieving high heat dissipation efficiency.

Further, the sealing assembly further includes a decorative frame strip 50 located outside the positioning member 40. The decorative frame strip 50 includes a decorative bottom plate 51 and a decorative side panel 52 disposed on a front side of the decorative bottom plate 51. The decorative bottom plate 51 is fixed to the positioning substrate 41 to be indirectly fixed to the back plate 10 . In this embodiment, the decorative bottom plate 51 is preferably attached and fixed to the bottom surface of the positioning substrate 41 to reduce the overall thickness of the housing. In the present embodiment, the decorative bottom plate 51 is fixed to the positioning substrate 41 by screws; of course, in other embodiments, the decorative bottom plate 51 is welded or snapped to the positioning substrate 41. The rear side of the decorative bottom plate 51 is covered at least to the bottom edge of the plate body 11 to avoid the components between the bottom edge of the display screen 30 and the decorative bottom plate 51, and to avoid the bottom edge of the optical die set and the decorative bottom plate 51. The parts are exposed. In this embodiment, since the display screen 30 is heavy, in order to prevent the display screen 30 from sliding under the action of gravity, a screen support strip disposed alongside the backlight strip is further disposed between the decorative bottom plate 51 and the bottom edge of the display screen 30.

In this embodiment, the decorative side panel 52 is spaced apart from the positioning side panel 42 , and the bottom of the display screen 30 is located between the decorative side panel 52 and the positioning side panel 42 . In order to better limit the display screen 30, the inner side of the decorative side panel 52 is provided with a stop protrusion 53 which abuts the front side of the display screen 30, thereby avoiding When the display screen 30 is not firmly bonded to the side partition 13, it is tilted forward. At the same time, by providing the stopper projections 53, it is also possible to ensure that the decorative side panel 52 is in sealing contact with the display screen 30 to prevent dust from entering. In the present embodiment, the stopper projections 53 are elongated, preferably extending along the extending direction of the decorative side panel 52. In other embodiments, the stop protrusion 53 may include a plurality of limit bumps spaced apart along the extending direction of the decorative side panel 52. The stopper projection 53 is provided separately from the decorative side panel 52. For example, the stopper projection 53 is embedded on the rear side surface of the decorative side panel 52. Alternatively, the stopper projection 53 is engaged behind the decorative side panel 52. On the side; of course, the stop projection 53 can be integrally formed with the decorative side panel 52.

Referring to FIG. 6 to FIG. 9, in the assembly, the reflective sheet 21 of the optical die set 20 is first loaded into the inner side of the panel body 11 from the rear, and then the cushion 60 is pushed toward the top plate 14 to The top plate body 14 is abutted, and then the remaining other die pieces of the optical die set 20 (such as the light guide plate 22 and the DOP film 23) are slidably mounted into the two sliding grooves 16, so that the optical die set can be mounted on the casing. The display screen 30 is then placed directly from the front side on the front side of the side partition 13 and the display screen 30 is fixed to the side partition 13.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the patents of the present application, and the equivalent structural transformation, or direct/indirect use, of the present application and the contents of the drawings is used in the present invention. All other related technical fields are included in the patent protection scope of the present application.

Claims (20)

 A liquid crystal display device, comprising: a housing, the housing includes a backboard, the backboard includes a board body, and two side plates disposed on opposite sides of the board body, and the inner sides of the side boards are respectively provided with corresponding a laterally extending side partition, the plate body, the two side plates and the two side partitions together define two opposite sliding grooves; An optical die set slidably mounted to the two of the chutes; and A display screen is disposed opposite to the optical die set and is fixed to a front side of the side spacer. The liquid crystal display device according to claim 1, wherein a rear side surface of the side spacer is provided with a stopper convex portion, and the stopper convex portion is pressed against the optical mold group. The liquid crystal display device of claim 1, wherein a front side of the side panel protrudes from the side spacer to form a rib on both sides of the display screen. The liquid crystal display device of claim 1, wherein the display screen is bonded to the side spacer. The liquid crystal display device according to claim 1, wherein the back sheet is a sheet metal member, and the side partition plate is formed by bending a front side of the side panel body. A liquid crystal display device according to claim 1, wherein said plate body is arched rearward to form a mounting cavity for mounting a light source of said liquid crystal display device on an inner side surface of said plate body. The liquid crystal display device as claimed in claim 1, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device as claimed in claim 2, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device of claim 3, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device of claim 4, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device of claim 5, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device of claim 6, wherein the back plate further comprises a top plate body disposed on a top edge of the plate body, and a bottom edge of the plate body is vacant to be at a lower end of the two chutes Forming a mounting port for sliding the optical film set into the installation; The optical die set slides into the housing from the mounting opening, and the top of the optical die set abuts against the top plate body. The liquid crystal display device according to claim 7, wherein the inner side of the top plate body is provided with a top partition, the top partition is opposite to the plate body, the top partition, the plate body and the The top plate body collectively limits the limiting groove extending along the length direction of the top plate body, and the top of the optical die set abuts against the groove bottom of the limiting groove. The liquid crystal display device according to claim 13, wherein the groove bottom of the limiting groove is further provided with a cushion, and the top of the optical die set abuts against the cushion. The liquid crystal display device of claim 7, wherein the housing further comprises a sealing member that closes the decorative opening, the sealing assembly being fixed to the backing plate. The liquid crystal display device of claim 15, wherein the sealing assembly comprises a positioning member, the positioning member comprises a positioning substrate, and positioning side plates and mounting plates respectively disposed on two sides of the positioning substrate, the positioning substrate Located at the bottom of the optical die set and extending along the bottom of the optical die set, the positioning side plates are located on the front side of the optical die set, and the rear side of the positioning side plates are provided with rear Positioning the convex portion, the lower end of the optical die set correspondingly has a positioning hole for inserting the rear positioning convex portion; the mounting plate is located at a rear side of the optical die set and fixed to the plate body . The liquid crystal display device according to claim 16, wherein a rear side surface of the positioning side plate is provided with a pressing convex portion that is pressed against a front side surface of the optical mold group. The liquid crystal display device according to claim 16, wherein the front side surface of the positioning side panel is further provided with a front positioning convex portion, and the bottom of the display screen abuts the front positioning convex portion. The liquid crystal display device of claim 16, wherein the sealing assembly further comprises a decorative frame strip located outside the positioning member, the decorative frame strip comprising a decorative bottom plate, and a decoration provided on a front side of the decorative bottom plate a side plate, the decorative bottom plate is fixed to the positioning substrate, and a rear side of the decorative bottom plate is at least covered to a bottom edge of the plate body, and the decorative side plate is spaced apart from the positioning side plate. The bottom of the display screen is located between the decorative side panel and the positioning side panel. A liquid crystal display device according to claim 19, wherein an inner side surface of said decorative side panel is provided with a stopper projection which abuts against a front side surface of said display screen.