WO2018205837A1

WO2018205837A1 - Backlight module and display apparatus

Info

Publication number: WO2018205837A1
Application number: PCT/CN2018/084564
Authority: WO
Inventors: 许业顺; 孙文波
Original assignee: 京东方科技集团股份有限公司; 合肥京东方显示光源有限公司
Priority date: 2017-05-10
Filing date: 2018-04-26
Publication date: 2018-11-15
Also published as: CN206708858U

Abstract

A backlight module (100) and a display apparatus. The backlight module (100) comprises a rubber frame (110), an optical component (120) composed of a plurality of stacked optical film sheets, and a binding member (140). The rubber frame (110) comprises an accommodating space and a recessed groove (111) arranged on at least one side wall; each optical film sheet comprises a body (130), and at least two optical film sheets also comprise a lug (131) protruding outward along at least one side wall of the body (130); the body (130) is arranged inside the accommodating space, the lugs (131) being stacked in the recessed groove (111) such that the optical component (120) is disposed at a preset position of the rubber frame (110); the binding member (140) is sleeved over the outside of the lugs (131) in order to secure the plurality of optical film sheets into an integral optical component (120). The backlight module (100) can effectively prevent the plurality of optical film sheets from becoming displaced or misaligned and effectively prevents the backlight module (100) from leaking light.

Description

Backlight module and display device

Technical field

Embodiments of the present application relate to a backlight module and a display device including the same.

Background technique

The conventional narrow-edge backlight module needs to assemble the multilayer optical film and the plastic frame. Therefore, how to design a backlight module capable of effectively preventing light leakage has become a technical problem to be solved in the field.

Summary of the invention

In order to solve at least one technical problem existing in the prior art, an embodiment of the present application provides a backlight module and a display device including the same.

In order to achieve the above object, embodiments of the present application adopt the following technical solutions.

In one aspect, a backlight module is provided, the backlight module includes a plastic frame, an optical member composed of a plurality of laminated optical films, and at least one binding member, the plastic frame including a plurality of sidewalls Accommodating a space, and at least one side wall of the plastic frame is provided with a groove, each of the optical films in the optical member comprises a body, and at least the top and bottom optical films comprise at least one along the body a lug protruding from an outer side of the body toward the outer side of the body, the body being disposed in the receiving space, the lug being stacked in the groove, such that the optical member is in the plastic frame At a preset position, and the binding member is sleeved on the outside of the lug to fix the plurality of optical films as an integral optical member.

Illustratively, two of the lugs are respectively disposed on two side walls of the body opposite to each other in the longitudinal direction.

Illustratively, the width of the groove in the width direction of the bezel is 0.4-0.6 mm larger than the width of the lug in the width direction of the bezel.

Illustratively, the binding member has elasticity.

Illustratively, the binding member is a rubber band.

Illustratively, the backlight module further includes a tape, and a sidewall of the plastic frame provided with the groove is further provided with a tape receiving groove, a recessed direction of the adhesive tape groove and a recess of the groove The direction is the same, and the recessed depth of the tape pocket is smaller than the recess depth of the groove, and the end of the tape is disposed in the tape pocket, and the other end of the tape is connected to the optical member.

Illustratively, the bottom of the tape pocket is flush with the top surface of the lug of the top optical film in the optical member.

Illustratively, the backlight module further includes a back plate and a light guide plate, the back plate and the plastic frame are fixedly connected, and the light guide plate is disposed in the receiving space of the plastic frame, and is located in the optical member. Between the body of the middle bottom optical film and the back plate.

Illustratively, the optical member includes a diffusion sheet, a first prism sheet, a second prism sheet, and a protective sheet laminated on the plastic frame.

An embodiment of the present application further provides a display device, which includes the backlight module in any of the foregoing embodiments.

The backlight module and the display device provided by the embodiments of the present application are provided with a binding member, and the plurality of optical films can be fixed into an integrated optical device by sleeved on the outer side of the lugs of the plurality of optical films. The component can effectively prevent displacement or misalignment of the plurality of optical films in the grooves on the sidewall of the plastic frame, thereby effectively avoiding the occurrence of light leakage in the backlight module and the display device, and at the same time, due to the simple structure, The production efficiency of the backlight module and the display device is effectively improved.

DRAWINGS

The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, in which FIG.

1 is a schematic structural view of a backlight module;

2 is a schematic structural diagram of a backlight module according to an embodiment of the present application;

FIG. 3 is another schematic structural diagram of a backlight module according to an embodiment of the present disclosure;

4 is a schematic structural view of an optical component in a backlight module according to an embodiment of the present application;

FIG. 5 is a top view of an optical film constituting an optical member in a backlight module according to an embodiment of the present application.

Reference mark:

100: backlight module; 110: plastic frame; 111: groove; 112: tape groove; 120: optical member; 121: diffusion sheet; 122: first prism sheet; 123: second prism sheet; 124: protective sheet 130: body; 131: lug; 140: binding piece; 150: tape; 160: back plate; 170: light guide plate.

detailed description

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

Unless otherwise defined, technical terms or scientific terms used herein shall be taken to mean the ordinary meaning of the ordinary skill in the art to which the invention pertains. The words "first", "second" and similar terms used in the specification and claims of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the words "a", "an", "the" The word "comprising" or "comprises" or the like means that the element or item preceding the word is intended to be in the "Upper", "lower", etc. are only used to indicate the relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may also change accordingly.

1 shows a structural view of a narrow-edge backlight module 100. The optical film group 120 is formed by using a tape between adjacent optical films to form an optical film group 120. The outer edge is provided with a lug, and one side of the plastic frame 110 is provided with a groove 111. When the optical film set 120 is assembled to the plastic frame 110, it is necessary to arrange the lugs in the grooves 111, thereby forming the positioning reference to form the backlight module 100 of the desired structure.

However, in the backlight module 100 of the above structure, the design width of the groove 111 is generally about 0.4-0.6 mm larger than the width of the lug. Therefore, the optical film will be displaced in the groove 111, as shown in FIG. The phenomenon that the two sides of the optical film are not aligned on each other is displayed, which may cause light leakage on the light-emitting side of the backlight module 100. At the same time, there is no retaining wall between the optical film on the top layer of the optical film group 120 and the edge of the plastic frame 110, so that the optical film is easily displaced in the left-right direction in FIG. 1, resulting in black edges of the optical film. It is easy to block pixels. In addition, in the direction perpendicular to the paper surface shown in FIG. 1, the fixing tape between the adjacent optical films is narrow, and the multilayer optical film 120 is also easily displaced, which also causes the backlight module 100 to be Light leakage occurred on the light exit side.

Referring to FIGS. 2 through 4, a backlight module 100 provided by at least one embodiment of the present application is illustrated. The backlight module 100 includes a bezel 110 and an optical member 120, and the optical member 120 includes a plurality of laminated optical films, for example, a plurality of

optical films

121, 122, 123, and 124 as shown in FIG. The plastic frame 110 provides a receiving space (extending in a direction perpendicular to the paper surface of FIG. 2, and thus is not shown in the drawing), and at least one side wall of the plastic frame 110 (ie, the groove 111 in FIG. 2) A groove 111 is disposed on the side wall. Further, as shown in FIG. 4, each optical film includes a body 130, and at least two of the top and bottom optical films of the optical member 120 further include at least one sidewall along the body 130 toward the body A lug 131 that protrudes from the outside of the 130. In one example, each of the optical members 120 is provided with a lug 131.

In the embodiment of the present application, the bodies 130 of each optical film are disposed in a housing space in a manner of being stacked on each other, and the lugs 131 of the optical film provided with the lugs 131 on the same side of the optical member are stacked. In the corresponding groove 111, the multilayer optical film 120 is placed at a preset position of the plastic frame 110. For example, FIG. 2 shows that the lugs 131 on the same side of the plurality of optical films are stacked in their corresponding grooves 111, and the body 130 of the optical film is placed perpendicular to the paper surface of FIG. It is not included in the accommodation space.

As shown in FIG. 2 and FIG. 4, in the embodiment, the backlight module 100 further includes at least one binding component 140. Each of the binding members 140 is sleeved on the outside of the plurality of lugs 131 on the same side of the optical member to fix the plurality of optical films together.

In one example, when assembling the backlight module 100 of the structure, the lugs 131 of the plurality of optical films are first bundled by the binding member 140 to fix the plurality of optical films into a unitary structure; The lug 131 of the plurality of optical films that is sleeved with the binding member 140 is placed (eg, inserted) into a corresponding groove 111 on the sidewall of the plastic frame 110, as shown in FIG. 2, that is, the The groove 111 corresponds to the positioning reference of the optical member 120; thereafter, the stacked body 130 of the plurality of optical films in the optical member 120 is placed in the accommodation space of the plastic frame 110.

It should be noted that the embodiment of the present application does not limit the specific structure of the binding member 140 as long as it can be sleeved on the lugs of the plurality of optical films to integrally fix the plurality of optical films together. Just fine.

As described above, the backlight module 100 provided in the embodiment of the present application is provided with a binding member 140. By clamping the binding member 140 on the outer side of the lugs 131 of the plurality of optical films, the plurality of optical films can be fixed. For the integrated optical component 120, the displacement or misalignment of the plurality of optical films in the groove 111 on the sidewall of the plastic frame 110 can be effectively prevented, thereby effectively preventing the light leakage phenomenon of the backlight module 100 from occurring; The structure is simple, and the manufacturing yield of the backlight module 100 can be effectively improved.

In one embodiment, as shown in FIG. 5, the body 130 is provided with two of the lugs 131 on the two opposite side walls. Correspondingly, two grooves 111 are also respectively disposed on the two opposite sidewalls of the plastic frame 110. Wherein, each of the lugs 131 is disposed in the groove 111 corresponding thereto.

As described above, the backlight module 100 of the present embodiment is provided with two of the lugs 131 on two side walls opposite to each other along the longitudinal direction of the body 130 of the optical film, which can further effectively perform a plurality of opticals. The diaphragm is fixed in one body, so that the displacement or misalignment of the plurality of optical films in the groove 111 can be effectively prevented, thereby preventing the light leakage phenomenon of the backlight module 100 from occurring. In addition, when the backlight module 100 of the structure is assembled, two lugs 131 are disposed on both sides of the body 130 of the plurality of optical films in the longitudinal direction, which also facilitates the correct assembly of the backlight module 100 of the structure. The multilayer optical film 120 is accurately positioned at the preset position of the plastic frame 110, avoiding the occurrence of the error or the phenomenon of mounting the multilayer reflective film 120, improving the manufacturing yield of the backlight module 100, and reducing the manufacturing cost.

In an embodiment, the width of the groove 111 along the width direction of the bezel 110 is greater than the width of the lug 131 along the width direction of the bezel 110 by 0.4-0.6 mm; for example, in FIG. The horizontal direction shown is the above width direction.

As described above, in the backlight module 100 of the embodiment, the width of the groove 111 along the width direction of the bezel 110 is designed to be 0.4-0.6 mm larger than the width of the lug 131 in the width direction of the bezel 110. The assembly of the plurality of optical films facilitates the damage to the optical film during the assembly of the plurality of optical films 120, thereby avoiding the occurrence of waste of resources and the like.

In an embodiment, the binding member 140 has elasticity, that is, the binding member 140 is formed of an elastic material.

As described above, in the backlight module 100 of the embodiment, the binding member 140 has elasticity, and can well accommodate the expansion and contraction changes caused by the plurality of optical films when subjected to changes in the external environment, and can further effectively prevent the plurality of optical films. The phenomenon that the sheet is displaced or misaligned in the groove 111 prevents the light leakage phenomenon of the backlight module 100 from occurring.

It should be noted that the specific manufacturing material of the binding member 140 is not specifically limited in the embodiment of the present application, and for example, it may be a spring or the like.

In an embodiment, the binding member 140 is a rubber band. For example, when assembling the backlight module 100 of the structure, the rubber band is first sleeved on the outer side of the lugs 131 of the plurality of optical films to fix the plurality of optical films together; then the rubber band is set The lug 131 is integrally disposed within the recess 111 as a positioning reference for subsequent further placement of the body 130 of the optical film to accurately position the optical member 120 on the bezel 110.

As described above, in the backlight module 100 of the embodiment, the rubber band is used as the binding member 140, and the rubber band is easy to operate, which reduces the operation difficulty when assembling the backlight module 100 of the structure; at the same time, the manufacturing process of the rubber band is simple. And also having good elasticity. When the environment of the backlight module 100 changes, for example, when the backlight module 100 is in a high temperature environment and causes a plurality of optical films on the plastic frame 110 to expand, The rubber cap with good elasticity can be well adapted to the optical film which is expanded, does not cause damage to the optical film, saves resources, and further reduces the manufacturing cost of the backlight module 100.

In an embodiment, the backlight module 100 further includes an adhesive tape 150. For example, as shown in FIG. 2-3, a tape receiving groove 112 is further disposed on a sidewall of the plastic frame 110 provided with the groove 111, and a recessed direction of the adhesive tape groove 112 and the groove The recessed direction of 111 is the same, and the recessed depth of the tape pocket 112 is smaller than the recessed depth of the recess 111. One end of the tape 150 is disposed in the tape pocket 112, and the other end of the tape 150 is coupled to the optical member 120; for example, bonded to the plurality of optical films.

Different from the foregoing embodiment, when assembling the backlight module 100 of the structure in the embodiment, the plurality of optical films are fixed to the integrated optical member 120 by the binding member 140 and the plurality of optical films are After the lug 131 is placed in the groove 111 of the plastic frame 110, the optical structure 120 needs to be fixed to the plastic frame 110 by the tape 150.

As described above, the backlight module 100 of the structure of the present embodiment is further provided with a tape 150 and a tape receiving groove 112, which is convenient for accommodating the tape 150; thus, the optical device 150 can be used for the simple structure. The member 120 is fixed to the plastic frame 110.

In one embodiment, the bottom of the tape pocket 112 is flush with the top surface of the lug 131 of the optical film on the top layer of the optical member 120. That is, as shown in FIG. 2 or 3, when the lugs 131 of the plurality of optical films are disposed in the grooves 111, the upper surface of the optical film located on the top layer of the optical member 120 and the tape receiving groove 112 The bottom is flush.

As described above, in the backlight module 100 of the structure of the present embodiment, the bottom of the tape receiving groove 112 is disposed flush with the top surface of the lug 131 of the optical film located on the top layer of the optical member 120; When the optical member 120 is fixed on the plastic frame 110, the bonding surface of the adhesive tape 150 is a flat surface, which can effectively improve the bonding performance of the adhesive tape 150 and improve the production of the backlight module 100. The rate can also effectively improve the display performance of the backlight module 100.

In an embodiment, the backlight module 100 further includes a back plate 160 and a light guide plate 170. As shown in FIG. 3 , the back plate 160 and the plastic frame 110 are fixedly connected, and the light guide plate 170 is disposed in the receiving space of the plastic frame 110 and located in the bottom optical film 121 of the optical member 120 . Between the body 130 and the backing plate 160.

When the backlight module 100 of the present embodiment is assembled, as shown in FIG. 3, the plastic frame 110 can be first fixed on the back plate 160. For example, the plastic frame 110 is snapped onto the back by the snap-fit structure. The plate 160 is arranged for easy assembly and subsequent disassembly; then the light guide plate 170 is disposed on the bottom wall of the back plate 160; and the lugs 131 of the plurality of optical films 121-124 bundled by the binding member 140 are placed. The optical module 120 is fixed on the plastic frame 110 to form the backlight module 100 of the structure.

In one embodiment, as shown in FIG. 3, the plurality of optical films in the optical member 120 include a diffusion sheet 121, a first prism sheet 122, and a second prism sheet stacked on the plastic frame 110. 123 and protective sheet 124. However, embodiments of the present application are not limited thereto.

As described above, the present embodiment provides an exemplary structure of an optical structure 120 including a plurality of optical films, the optical structure 120 including a diffusion sheet 121, a first prism sheet 122, and a first layer disposed on the plastic frame 110. The prism sheet 123 and the protective sheet 124. The diffusion sheet 121 can uniformly diffuse the light emitted from the light guide plate 170 on the screen, so that the light can be transmitted to the front surface of the first prism sheet 122 and the display panel in the display device to which the backlight module 100 is applied. Broaden the angle of view and soften the light. The first and

second prism sheets

122 and 123 can function as a light diffusing film, and have the function of concentrating the diffused light at a certain angle to improve the brightness concentration of the display device to which the backlight module 100 is applied, thereby enabling The display performance of the display device to which the backlight module 100 is applied is improved.

Based on the same inventive concept, an embodiment of the present application further provides a display device, which includes the backlight module 100 in any of the foregoing embodiments.

As described above, the display device of the present embodiment has the backlight module 100 described above, in which the plurality of optical films are disposed by arranging the binding member 140 on the outer side of the lugs 131 of the plurality of optical films. The sheet 120 is fixed to the integral optical member 120, which can effectively prevent displacement or misalignment of the plurality of optical films in the groove 111 on the sidewall of the plastic frame 110, thereby effectively preventing the light leakage phenomenon of the display device; Simple, it can effectively improve the production yield of the display device.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

The present application claims the priority of the Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No.

Claims

A backlight module includes a plastic frame, an optical member composed of a plurality of laminated optical films, and at least one binding member.

The plastic frame includes an accommodating space surrounded by a plurality of side walls, and at least one side wall of the plastic frame is provided with a groove.

Each of the optical sheets of the optical member includes a body, and at least the top and bottom optical sheets include lugs that protrude toward an outer side of the body along at least one sidewall of the body, the body being disposed at The lug is stacked in the recess in the receiving space such that the optical member is at a preset position of the bezel, and

The binding member is sleeved on the outside of the lug to fix the plurality of optical films as an integral optical member.
The backlight module of claim 1, wherein two of the lugs are respectively disposed on the two opposite sidewalls of the body.
The backlight module of claim 1, wherein a width of the groove in a width direction of the bezel is 0.4-0.6 mm larger than a width of the lug in a width direction of the bezel.
The backlight module of claim 1, wherein the binding member has elasticity.
The backlight module of claim 4, wherein the binding member is a rubber band.
The backlight module of claim 1 further comprising an adhesive tape.

The side wall of the plastic frame provided with the groove is further provided with a tape receiving groove, the concave direction of the adhesive tape groove is the same as the concave direction of the groove, and the concave depth of the adhesive tape groove is smaller than The recessed depth of the groove, and

The end of the tape is disposed in the tape pocket, and the other end of the tape is coupled to the optical member.
The backlight module of claim 6, wherein a bottom of the tape pocket is flush with a top surface of a lug of the top optical film of the optical member.
The backlight module of claim 1 further comprising a back plate and a light guide plate.

The backboard and the plastic frame are fixedly connected,

The light guide plate is disposed in the receiving space of the plastic frame and is located between the body of the bottom optical film and the back plate in the optical member.
The backlight module according to any one of claims 1 to 8, wherein the optical member comprises a diffusion sheet, a first prism sheet, a second prism sheet, and a protective sheet laminated on the plastic frame.
A display device comprising the backlight module according to any one of claims 1 to 9.