CN211826835U

CN211826835U - Local reverse-assembled ultra-narrow frame backlight module

Info

Publication number: CN211826835U
Application number: CN202020630849.8U
Authority: CN
Inventors: 龚科; 姚志图; 罗增昌; 刘启玉; 彭环洋; 刘丽花
Original assignee: WAI CHI OPTOELECTRONIC Ltd
Current assignee: WAI CHI OPTOELECTRONIC Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-10-30
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a local anti-super narrow frame backlight unit who organizes, including inferior valve, side income formula lamp strip, light guide plate, upper ledge and diaphragm subassembly, side income formula lamp strip bonds and fixes on the light guide plate, the light guide plate bonds and fixes on the downside of upper ledge, the diaphragm subassembly bonds and fixes on the last side of upper ledge, the upper ledge is installed on the inferior valve. The utility model discloses a change backlight unit's that backlight unit's structure adapts to frivolous structure equipment, especially the equipment of the backlight unit that the inferior valve is frivolous, intensity is low.

Description

Local reverse-assembled ultra-narrow frame backlight module

Technical Field

The utility model relates to a backlight technical field, concretely relates to local anti-super narrow frame backlight unit who organizes.

Background

The structure is used for providing backlight source for passive light-emitting devices such as liquid crystal displays and the like, and comprises a direct type backlight module and a side type backlight module, wherein the general side type backlight module comprises a lower shell, a side type light source, a light guide plate, a membrane assembly and an upper frame, the side type light source is bonded on the inner side surface of the lower shell during assembly, the light guide plate and the membrane assembly are directly assembled in the lower shell, and the upper frame is fixed on the lower shell at last. However, for some side-in type backlight modules with very light and thin design, especially for backlight modules with thinner and thinner lower cases, because the lower cases are light and thin and have low strength, it is inconvenient to directly bond and fix the side-in type light source on the lower cases, and it is also inconvenient to directly assemble the light guide plate and the diaphragm assembly in the lower cases with unstable structures, so the current common backlight module mounting structures are not suitable for the side-in type backlight modules with light and thin lower cases.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to the not enough in the background art, provide the local anti-super narrow frame backlight unit who organizes that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a local anti-super narrow frame backlight unit who organizes, includes inferior valve, side income formula lamp strip, light guide plate, upper ledge and diaphragm subassembly, side income formula lamp strip bonding fixation is on the light guide plate, the light guide plate bonding fixation is on the downside of upper ledge, diaphragm subassembly bonding fixation is on the last side of upper ledge, the upper ledge is installed under the valve.

Furthermore, the lateral light-in type light bar is a lateral light-emitting light bar, the lateral light-in type light bar and the light guide plate are bonded together through a U-shaped double-faced adhesive tape or a return-shaped double-faced adhesive tape, and a convex block is arranged on the outer side of the light guide plate and bonded on the lateral light-in type light bar.

Further, the recess of intercommunication about the upper ledge inboard is provided with, it has first single face to glue to paste on the upper ledge downside, the face of gluing that first single face was glued is exposed from the recess, the diaphragm subassembly bonds and fixes on the face of gluing that first single face was glued from the recess and is exposed.

Furthermore, the membrane assembly comprises a plurality of layers of membranes which are sequentially stacked, lugs are arranged on the outer sides of the membranes, the lugs on the outer sides of the membranes are arranged in a staggered mode, and the membranes are bonded and fixed on the first single-sided adhesive through the lugs.

The diaphragm fixing frame further comprises a second adhesive tape, wherein the second adhesive tape is adhered to the lug of each diaphragm, and each diaphragm is adhered to the upper side face of the upper frame.

Further, the diaphragm assembly is adhered to the upper side face of the upper frame from the outer side of the diaphragm assembly through the annular adhesive tape.

Further, the backlight module further comprises a reflecting film, wherein the reflecting film is arranged below the light guide plate and is fixedly adhered to the lower surface of the upper frame.

Further, a groove is formed in the lower surface of the upper frame, and the reflecting film is bonded in the groove through a double-sided adhesive tape.

The light guide plate is characterized by further comprising two lateral light bars, wherein the two lateral light bars are respectively fixedly adhered to two opposite sides of the light guide plate; the side-in light bar is formed by bending a straight-bar FPC.

Furthermore, the lower shell is provided with a through groove, the shielding film is bonded on the outer side of the through groove, and a filling layer is arranged in the through groove.

The utility model discloses the beneficial effect who realizes mainly has following several: backlight unit's side income formula lamp strip bonds and fixes on the light guide plate, and the light guide plate bonds and fixes on the downside of upper ledge, and the diaphragm subassembly bonds and fixes on the last side of upper ledge, and the upper ledge is installed on the inferior valve. When the lateral type backlight module is assembled, the lateral type light bar can be firstly bonded and fixed on the light guide plate, then the integral structure of the lateral type light bar and the light guide plate is bonded and fixed on the lower side surface of the upper frame, then the diaphragm assembly is bonded and fixed on the upper side surface of the upper frame, and finally the integral structure formed by connecting the lateral type light bar, the light guide plate, the upper frame and the diaphragm assembly is arranged on the lower shell, so that the assembly of the backlight module can be completed; the lateral light bar, the light guide plate, the diaphragm assembly and the upper frame of the backlight module with the structure are directly installed without being directly installed with the lower shell, and the backlight module can be assembled by the lower shell which is light, thin, low in strength and ultra-narrow in frame.

Drawings

Fig. 1 is an exploded schematic view of a partially inverted ultra-narrow bezel backlight module according to an embodiment of the present invention;

fig. 2 is a schematic view of an explosion structure in which a light guide plate of a partially inverted ultra-narrow frame backlight module is fixedly bonded to a side-in light bar in an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of the portion B in FIG. 2;

fig. 5 is an exploded schematic view of an assembly of an upper side surface of an upper frame of a partially inverted ultra-narrow bezel backlight module and a diaphragm assembly according to a first embodiment of the present invention;

FIG. 6 is an enlarged view of the portion C of FIG. 5;

fig. 7 is an exploded schematic view of an assembly of the lower side surface of the upper frame of the ultra-narrow frame backlight module with the light guide plate and the reflective film according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of an outer side surface of a lower case of a backlight module with an ultra-narrow frame according to a local reverse group in an embodiment of the present invention;

fig. 9 is a schematic structural view of an inner side surface of a lower case of a partially inverted ultra-narrow bezel backlight module according to a first embodiment of the present invention;

fig. 10 is a schematic structural view of a partially inverted ultra-narrow frame backlight module according to an embodiment of the present invention before lateral bending;

fig. 11 is a schematic structural view of a laterally-inserted and bent ultra-narrow frame backlight module according to a first embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 11, a backlight module with a partially inverted ultra-narrow frame adapts to the assembly of a backlight module with a light, thin and ultra-narrow frame structure by changing the structure of the backlight module, especially the assembly of a backlight module with a light, thin and low-strength lower shell. The local reverse-assembled ultra-narrow frame backlight module comprises a lower shell 1, a lateral light bar 2, a light guide plate 3, an upper frame 4 and a diaphragm assembly 5. The lower shell 1 and the upper frame 4 together form a mounting and supporting structure for mounting the side-in light bar 2, the light guide plate 3 and the diaphragm assembly 5, and the lower shell 1 and the upper frame 4 are generally clamped and fixed together through a clamping structure. The side income formula lamp strip 2 is gone into as the light source of side income formula backlight unit, welds LED lamp 23 on FPC and makes. The light guide plate 3 and the film assembly 5 play roles in changing light emitting directions and diffusing light, and light emitted by the side-entry type light-emitting side-entry type light bar 2 forms a surface light source emitting light from the front side of the side-entry type light source.

Referring to fig. 1 to 4, the lateral light bar 2 is adhered and fixed on the light guide plate 3, generally by a double-sided adhesive tape. The light guide plate 3 is bonded and fixed to the lower side surface of the upper frame 4, and is also bonded and fixed by a double-sided adhesive tape in general. The membrane assembly 5 is fixedly bonded on the upper side surface of the upper frame 4, and can be fixedly bonded through a double-sided adhesive tape or a single-sided adhesive tape. That is, the light guide plate 3 and the film assembly 5, which are generally directly mounted in the lower case 1, are not directly assembled with the lower case 1 in the backlight module of this embodiment, but are reversely assembled at both sides of the upper frame 4. The upper frame 4 is installed on the lower casing 1, is generally fixed through the installation of buckle structure, can set up the fixture block on lower casing 1, sets up the card hole on upper frame 4, realizes the joint of upper frame 4 and lower casing 1 through fixture block and card hole cooperation. When the lateral type backlight module is assembled, the lateral type light bar 2 can be firstly bonded and fixed on the light guide plate 3, then the integral structure of the lateral type light bar 2 and the light guide plate 3 is bonded and fixed on the lower side surface of the upper frame 4, then the diaphragm assembly 5 is bonded and fixed on the upper side surface of the upper frame 4, and finally the integral structure formed by connecting the lateral type light bar 2, the light guide plate 3, the upper frame 4 and the diaphragm assembly 5 is installed on the lower shell 1, so that the assembly of the backlight module can be completed; the backlight module lateral light bar 2, the light guide plate 3, the upper frame 4 and the diaphragm assembly 5 of the structure are not required to be directly installed with the lower shell 1, and the backlight module can be also applicable to the backlight module assembly of the lower shell which is light, thin and low in strength.

Referring to fig. 2 to 4 and 7, as a further preferred scheme, the adhesive fixation between the lateral light bar 2 and the light guide plate 3 preferably adopts the following structure: the lateral light bar 2 is a lateral light bar, the LED23 is a lateral light bead, and the light emitting surface is positioned on the side surface of the LED. The lateral light bar 2 is adhered to the light guide plate 3 through a U-shaped double-sided adhesive tape 21 or a loop-shaped double-sided adhesive tape 22, an adhesive surface on one side of the U-shaped double-sided adhesive tape 21 or the loop-shaped double-sided adhesive tape 22 is attached to the FPC of the lateral light bar 2, and an adhesive surface on the other side is attached to the light guide plate 3; the hollow part of the "U" shaped double-sided adhesive tape 21 or the "loop" shaped double-sided adhesive tape 22 is used for avoiding the LED23, a U-shaped structure or an opening is also arranged on the outer side of the corresponding light guide plate 3, and the hollow part of the U-shaped structure or the opening avoids the LED 23. When 3 outsides of light guide plate set up the U-shaped structure, 3 outsides of light guide plate have lug 31, lug 31 bonds together through "U" shape double faced adhesive tape 21 with side income formula lamp strip 2. Adopt "U" shape double faced adhesive tape 21 or "go back" shape double faced adhesive tape 22 bonding between income formula lamp strip 2 of side and the light guide plate 3 all can, two relative minor faces of backlight unit set up one side income formula lamp strip respectively in this embodiment, and one of them side income formula lamp strip bonds through "U" shape double faced adhesive tape 21 with the light guide plate, and another side income formula lamp strip bonds through "going back" shape double faced adhesive tape 22 with the light guide plate. The light guide plate 3 is bonded and fixed on the lower side surface of the upper frame 4 through the double-sided adhesive tape 32, so that the light guide plate 3 and the upper frame 4 are tightly fixed together, and the light emitting effect outside the backlight module is ensured; the double-sided adhesive tape 32 may be provided on two or four opposite sides of the upper frame 4.

Referring to fig. 1, 5 and 6, as a further preferred solution, the upper frame 4 and the diaphragm assembly 5 are connected by the following structure: the recess 41 of intercommunication about the upper ledge 4 inboard is provided with, the downside of upper ledge 4 is pasted on the side has first single face to glue 42, and first single face glues 42's the face of gluing up to first single face glues 42's the face of gluing and exposes from recess 41, diaphragm subassembly 5 bonds and fixes on first single face glues 42 and follows the face of gluing that recess 41 exposes.

Referring to fig. 1, 5 and 6, the film assembly 5 includes a lower light diffusing film 52, a lower light diffusing film 53, an upper light diffusing film 54 and an upper light diffusing film 55 stacked in sequence, the outer sides of the lower light diffusing film 52, the lower light diffusing film 53, the upper light diffusing film 54 and the upper light diffusing film 55 are all provided with lugs 51, the lugs 51 outside the lower light diffusing film 52, the lower light diffusing film 53, the upper light diffusing film 54 and the upper light diffusing film 55 are arranged in a staggered manner, so that the lugs 51 outside the upper film can be exposed from the lugs 51 of the lower film to be in contact with the first single-sided adhesive 42 below, and the lugs 51 outside the lower light diffusing film 52, the lower light diffusing film 53, the upper light diffusing film 54 and the upper light diffusing film 55 can be bonded on the same first single-sided adhesive 42 below, thereby achieving bonding and fixing of four films on the upper frame 4 through one single-sided adhesive, that is material saving and convenient to assemble.

Referring to fig. 1, 5 and 6, in order to make the fixing of the membrane module 5 on the upper frame 4 more stable, a second adhesive tape 43 is further provided, the second adhesive tape 43 is adhered on the upper side of the upper frame 4, the second adhesive tape 43 is adhered on the lug 51 of each membrane, each membrane is adhered on the upper side of the upper frame 4, so that each membrane is adhered on the upper side of the upper frame 4 by the second adhesive tape 43, and simultaneously, each membrane is clamped between the second adhesive tape 43 and the first single-sided adhesive 42, so that each membrane is better fixed on the upper frame 4. The second adhesive tape 43 may be a double-sided adhesive tape, or a single-sided adhesive tape, when the double-sided adhesive tape is used, the lower adhesive surface is bonded to the upper surface of the upper frame 4 and the upper surface of the lug 51, and the upper surface of the double-sided adhesive tape may be used to bond and fix other structures. The upper surface of the upper frame 4 and the positions of the two sides of the groove 41 are preferably provided with a small positioning groove 45, and the second adhesive tape 43 is fixedly bonded through the small positioning groove 45, so that the second adhesive tape 43 is more accurately bonded on the upper surface of the upper frame 4.

Referring to fig. 1, in order to make the fixing of the diaphragm assembly 5 to the upper frame 4 more stable and to make the diaphragm assembly 5 more integral with the upper frame 4, an annular adhesive tape 44 is further provided, and the annular adhesive tape 44 adheres the diaphragm assembly 5 to the upper side surface of the upper frame 4 from the outside of the diaphragm assembly 5. The annular adhesive tape 44 is preferably black double-sided adhesive tape, the lower adhesive surface of the double-sided adhesive tape is adhered to the outer side of the membrane assembly 5 and the upper surface of the upper frame 4, and a subsequent adhered liquid crystal module is reserved on the upper adhesive surface of the annular adhesive tape 44; the adhesive surface of the annular adhesive tape 44 is preferably attached to a release film, and the release film is removed when the adhesive surface is adhered to a liquid crystal module by protecting the adhesive surface with the release film before the liquid crystal module is adhered to the liquid crystal module. The annular adhesive tape 44 may be of an integral annular structure, or may be formed by splicing a plurality of straight adhesive tapes.

Referring to fig. 1 and 7, the backlight module further includes a reflective film 6, and the reflective film 6 is disposed under the light guide plate 3 and adhesively fixed on the lower surface of the upper frame 4. Preferably, the protruding structure 61 is arranged on the outer side of the reflective film 6, the groove (not shown in the figure) is arranged on the lower surface of the upper frame 4, the double-faced adhesive tape is bonded on the protruding structure 61, the reflective film 6 is fixed and bonded in the groove when the lower surface of the upper frame 4 is provided, so that the reflective film 6 and the upper frame 4 are bonded and fixed together, and the reflective film 6 and the upper frame 4 are bonded smoothly, thereby being beneficial to improving the visual effect of the backlight module. The protruding structures 61 and the grooves may be disposed on two opposite sides or on each side of the backlight module, preferably on each side of the backlight module.

Referring to fig. 1, 10 and 11, the backlight module in this embodiment is provided with two lateral light bars 2, the two lateral light bars 2 are respectively bonded and fixed on two opposite sides of the short side of the light guide plate 3, and the backlight module is provided with the two lateral light bars 2, and light enters from two sides, so that the backlight module has higher brightness. The side-in light bar 2 is formed by bending a straight strip-shaped FPC, and in the embodiment, the side-in light bar is bent twice, the first bending is folded at a straight line a, and the first bending is bonded together through a double-sided adhesive tape 24; the second time of bending is bent at a position of a straight line b for 90 degrees, and the bent two parts are bonded through a double-sided adhesive tape 25 to finally form a T-shaped lateral entering type lamp strip, an LED is welded at the top of the T shape and is a light emitting part of the lateral entering type lamp strip, and the lower part of the T shape is an extending end which extends out from an opening 14 of the lower shell and is connected with an external power supply. The lamp strip is manufactured in a bending mode, and a T-shaped lateral entering type lamp strip can be formed by adopting a straight strip type FPC lamp strip to meet the requirement of a backlight module; and adopt the FPC of straight bar to buckle and can save the FPC material, reduce backlight unit's cost.

Referring to fig. 1, 8 and 9, as required, the lower case 1 may be provided with a through groove 11, and a shielding film 12 is bonded to the outer side of the through groove 11 and bonded to the outer edge of the through groove 11; the filling layer 13 is arranged in the through groove 11, the through groove 11 is filled and leveled on the inner side of the lower shell 1 through the filling layer 13, the reflecting film 6 is convenient to mount in the lower shell 1, and the edges and corners on the outer side of the through groove 11 are prevented from damaging the reflecting film 6; and the influence on the integral flatness of the inner side of the lower shell 1 is avoided, so that the influence on the integral light-emitting effect of the backlight module is avoided.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a local contrary super narrow frame backlight unit of group which characterized in that: including inferior valve (1), side income formula lamp strip (2), light guide plate (3), upper ledge (4) and diaphragm assembly (5), side income formula lamp strip (2) bonding is fixed on light guide plate (3), light guide plate (3) bonding is fixed on the downside of upper ledge (4), diaphragm assembly (5) bonding is fixed on the last side of upper ledge (4), install on inferior valve (1) upper ledge (4).

2. The partially inverted ultra-narrow bezel backlight module of claim 1, wherein: the lateral light-in type light bar (2) is a lateral light-emitting light bar, the lateral light-in type light bar (2) and the light guide plate (3) are bonded together through a U-shaped double-sided adhesive tape (21) or a return-shaped double-sided adhesive tape (22), a bump (31) is arranged on the outer side of the light guide plate (3), and the bump (31) is bonded on the lateral light-in type light bar (2).

3. The partially inverted ultra-narrow bezel backlight module of claim 1, wherein: the utility model discloses a diaphragm assembly, including upper ledge (4), lower frame (4), upper ledge (4) downside facing upper strata have first one-sided glue (42), the face of gluing of first one-sided glue (42) exposes from recess (41), diaphragm assembly (5) bonding is fixed on first one-sided glue (42) follow the face of gluing that recess (41) exposed.

4. The partially inverted ultra-narrow bezel backlight module of claim 3, wherein: the diaphragm assembly (5) comprises a plurality of layers of diaphragms which are sequentially stacked, lugs (51) are arranged on the outer sides of the diaphragms, the lugs (51) on the outer sides of the diaphragms are arranged in a staggered mode, and the diaphragms are bonded and fixed on the first single-sided adhesive (42) through the lugs (51).

5. The partially inverted ultra-narrow bezel backlight module of claim 4, wherein: the adhesive tape comprises a first adhesive tape (43), wherein the first adhesive tape (43) is adhered to the lug (51) of each membrane, and each membrane is adhered to the upper side face of the upper frame (4).

6. The partially inverted ultra-narrow bezel backlight module of claim 5, wherein: the diaphragm assembly (5) is adhered to the upper side face of the upper frame (4) from the outer side of the diaphragm assembly (5) through the annular adhesive tape (44).

7. The backlight module with ultra-narrow frame of any one of claims 1 to 6, wherein: the backlight module further comprises a reflecting film (6), wherein the reflecting film (6) is arranged below the light guide plate (3) and is fixedly adhered to the lower surface of the upper frame (4).

8. The partially inverted ultra-narrow bezel backlight module of claim 7, wherein: the lower surface of the upper frame (4) is provided with a groove, and the reflecting film (6) is bonded in the groove through a double-sided adhesive tape.

9. The backlight module with ultra-narrow frame of any one of claims 1 to 6, wherein: the light guide plate comprises two lateral light bars (2), wherein the two lateral light bars (2) are respectively adhered and fixed on two opposite sides of the light guide plate (3); the lateral light bar (2) is formed by bending a straight-strip FPC.

10. The partially inverted ultra-narrow bezel backlight module of claim 9, wherein: a through groove (11) is formed in the lower shell (1), a shielding film (12) is bonded to the outer side of the through groove (11), and a filling layer (13) is arranged in the through groove (11).