CN211506116U - Side-entry backlight module stable and reliable in assembly - Google Patents

Abstract

The utility model discloses a side-in type backlight module with stable and reliable assembly, which comprises a lower shell, a side-in type light bar, a light scattering component and an upper frame, wherein the side-in type light bar is fixed on the inner side wall of the lower shell, the light scattering component is fixed in the lower shell, and the upper frame is fixed on the upper side of the lower shell; the lower casing and the upper frame are both castings, the upper side of the lower casing is provided with a circle of protruding structures, the lower side of the upper frame is provided with a circle of groove structures, the protruding structures are matched with the groove structures, and the protruding structures are inserted into the groove structures. The utility model discloses an improve the connection structure of inferior valve and upper ledge for inferior valve and upper ledge are reliable and stable as bearing structure's backlight unit assembly.

Description

Side-entry backlight module stable and reliable in assembly

Technical Field

The utility model relates to a backlight unit technical field, concretely relates to side income formula backlight unit that assembly is reliable and stable.

Background

The backlight module is a backlight source of a passive light emitting display (such as a liquid crystal display), and the display function of the passive light emitting display can be realized only by providing a light source for the passive light emitting display on the back surface through the backlight module, so that the backlight module is an important component of the passive light emitting display. The backlight module generally includes a lower case, an upper case, a light bar, and a light scattering member, wherein the lower case and the upper case are supporting structures of the backlight module, and the light bar and the light scattering member are mounted together through the lower case and the upper case to form a stable backlight module. The lower shell of the existing backlight module generally adopts a metal structure formed by stamping, the upper frame generally adopts a plastic structure formed by injection molding, and the lower shell and the upper frame are fixed together by a buckle structure; stamping forming's inferior valve preparation precision is low, and inferior valve and upper ledge are fixed through simple buckle moreover, and the buckle structure between inferior valve and upper ledge is inefficacy easily when using under unstable external environment such as vibrations, sway, leads to inferior valve and upper ledge separation for whole backlight unit scatters, thereby influences backlight unit's normal work.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide a side income formula backlight unit that the assembly is reliable and stable.

In order to solve the technical problem, the technical scheme of the utility model is that: a side-in type backlight module stable and reliable in assembly comprises a lower shell, a side-in type light bar, a light scattering component and an upper frame, wherein the side-in type light bar is fixed on the inner side wall of the lower shell; the lower casing and the upper frame are both castings, the upper side of the lower casing is provided with a circle of protruding structures, the lower side of the upper frame is provided with a circle of groove structures, the protruding structures are matched with the groove structures, and the protruding structures are inserted into the groove structures.

Furthermore, the upper side of the lower shell is also provided with a positioning column, the lower side of the upper frame is also provided with a positioning hole, the positioning column is matched with the positioning hole, and the positioning column is inserted into the positioning hole.

Further, the lower shell and the upper frame are fixed together through screw threads.

Furthermore, a positioning lug is arranged on the outer side of the light scattering component, a positioning groove is formed in the inner side of the lower shell, the positioning lug is matched with the positioning groove, and the positioning lug is clamped in the positioning groove.

Furthermore, the light scattering assembly comprises a light guide plate, a light diffusion film, a lower light enhancement film, a middle light enhancement film and an upper light enhancement film which are sequentially stacked, fixing protrusions are arranged on the outer sides of the light diffusion film, the lower light enhancement film, the middle light enhancement film and the upper light enhancement film, and the fixing protrusions on the outer sides of the light diffusion film, the lower light enhancement film, the middle light enhancement film and the upper light enhancement film are arranged in a staggered mode; the lower shell is internally provided with a four-stage step structure, and the light-diffusing film, the lower light-adding film, the middle light-adding film and the fixing bulges at the outer sides of the upper light-adding film are respectively bonded and fixed on one step of the step structure.

Furthermore, a soft cushion block is clamped between the light guide plate and the lower shell, and the light guide plate is clamped in the lower shell through the soft cushion block.

Furthermore, the cushion blocks comprise a linear cushion block and an L-shaped cushion block, the linear cushion block is clamped outside the side edge of the light guide plate, and the L-shaped cushion block is clamped on the corner of the light guide plate; and an arc structure is arranged at the corner of the inner side of the L-shaped cushion block.

Furthermore, insulating rubber strips are attached to the inner side of the lower shell and the position below the lateral light bar.

Further, the inferior valve is provided with the trompil, the connector of formula lamp strip is gone into to the inferior valve back is worn out to the trompil from the trompil to the side.

Furthermore, a circle of buffer rubber mat is arranged at the top of the upper frame, and L-shaped rubber mats are arranged at four corners of the top of the upper frame.

The utility model discloses the beneficial effect who realizes mainly has following several: the outer part of the upper side of the lower shell of the backlight module is provided with a circle of convex structures, the outer part of the lower side of the upper frame of the backlight module is provided with a circle of groove structures, and the convex structures and the groove structures are a whole circle of structures on the lower shell and the upper frame, so that the whole circle of structures can connect all parts of the periphery of the lower shell and the upper frame together, the assembly of the lower shell and the upper frame is more stable and reliable, the assembly of the lateral backlight module is more stable and reliable, and the stability and the reliability of the use of the backlight module under severe conditions are ensured; and the thickness of the backlight can be reduced by the mutually buckled and embedded structure. The lower shell and the upper frame are made of castings, and the castings are high in manufacturing accuracy, so that the manufacturing accuracy of the backlight module can be improved.

Drawings

Fig. 1 is an exploded schematic view of a backlight module according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a lower case of a backlight module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the upper surface of the lower shell of the backlight module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the lower surface of the upper frame of the backlight module according to the first embodiment of the present invention;

fig. 5 is a schematic structural view of an upper surface of an upper frame of a backlight module according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a light guide plate of a backlight module according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a light-diffusing film of a backlight module according to an embodiment of the present invention;

fig. 8 is a schematic structural view illustrating a cushion block of a backlight module according to a first embodiment of the present invention installed in a lower case;

fig. 9 is a schematic structural diagram of an L-shaped spacer of a backlight module according to an 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 9, a side-in type backlight module with stable and reliable assembly is provided, in which a connection structure of a lower housing 1 and an upper housing 4 is improved, so that the backlight module with the lower housing 1 and the upper housing 4 as a supporting structure is stable and reliable in assembly. The side-in type backlight module comprises a lower shell 1, a side-in type light bar 2, a light scattering component 3 and an upper frame 4, wherein the lower shell 1 and the upper frame 4 are used as supporting structures for installing the optical structure side-in type light bar 2 and the light scattering component 3. The lower shell 1 is of a cavity structure with an opening at the upper side, and the upper frame 4 is of a frame structure; the lower shell 1 and the upper frame 4 are both castings, and can adopt die castings formed by aluminum die casting, namely aluminum castings; the lower shell 1 and the upper frame 4 manufactured by adopting a die-casting forming mode have high precision, and the manufacturing precision of the backlight module can be improved. The side-in light bar 2 is fixed on the inner side wall of the lower shell 1 and provides a side light source for the backlight module; the side income formula lamp strip 2 includes PCB board 22, LED lamp 23 and connector 21, and LED lamp 23 and connector 21 all weld on PCB board 22's circuit, and PCB board 22 passes through the double faced adhesive tape 24 bonding of heat conduction and fixes on the inside wall of inferior valve 1. The light scattering component 3 is fixed in the lower casing 1, and the light scattering component 3 comprises a reflective film 38, a light guide plate 32, a light scattering film 33, a lower light enhancement film 34, a middle light enhancement film 35 and an upper light enhancement film 36 which are sequentially stacked, and a lateral light source emitted by the lateral light bar 2 forms an even back surface light source through the light scattering component 3. The upper frame 4 is fixed on the upper side of the lower shell 1 and limits the light scattering component 3 in the lower shell 1; the fixed connection of the upper frame 4 and the lower shell 1 can adopt common fixing modes such as screw joint, clamping, bonding and the like.

Referring to fig. 2 to 5, a circle of protruding structures 11 is arranged outside the upper side of the lower casing 1, a circle of groove structures 41 is arranged outside the lower side of the upper frame 4, the protruding structures 11 are matched with the groove structures 41, that is, the protruding structures 11 are identical to the groove structures 41 in shape, size and shape, so that the protruding structures 11 can be inserted into the groove structures 41 to buckle the lower casing 1 and the upper frame 4 together. Because protruding structure 11 and groove structure 41 are a whole circle structure on inferior valve 1 and upper frame 4, this whole circle structure can link together inferior valve 1 and each position of upper frame 4 outlying for inferior valve 1 and upper frame 4's assembly is more reliable and more stable, also makes the assembly of side income formula backlight unit more reliable and more stable, even use under the adverse conditions such as vibrations, rocking and still can guarantee backlight unit's stability and reliability.

Referring to fig. 2 to 5, as a further preferred scheme, the upper side of the lower casing 1 is further provided with a positioning column 12, the lower side of the upper frame 4 is further provided with a positioning hole 42, the positioning column 12 is matched with the positioning hole 42, that is, the positioning column 12 is identical to the positioning hole 42 in size, shape and position, when the lower casing 1 is assembled with the upper frame 4, the positioning column 12 is firstly inserted into the positioning hole 42, the lower casing 1 and the upper frame 4 are preliminarily positioned, and then the lower casing 1 and the upper frame 4 are assembled in place through the matching of the protruding structure 11 and the groove structure 41. Two groups of positioning columns 12 and positioning holes 42 can be arranged on two opposite corners of the lower shell 1 and the upper frame 4, or four corners of the lower shell 1 and the upper frame 4 are both provided; the positioning post 12 is generally configured to be cylindrical, and the positioning hole 42 is generally configured to be a round blind hole, and may also be configured to be a round through hole.

Referring to fig. 2 to 8, as a further preferred scheme, the lower case 1 and the upper case 4 are screwed together by screws in this embodiment. Can all set up a plurality of vertical through-holes 16 on each side in inferior valve 1 outside, set up a plurality of screws 45 at the corresponding position of upper ledge 4, screw 45 sets up to the blind hole best to can pass through 16 spiro couplings of through-hole to screw 45 in through the screw from inferior valve 1's the back, further fix inferior valve 1 and upper ledge 4 together, form more reliable and stable structure.

Referring to fig. 1 to 8, the outer side of the light scattering component 3 is provided with a positioning lug 31, the inner side of the lower shell 1 is provided with a positioning groove 13, the positioning lug 31 is matched with the positioning groove 13, that is, the size, shape and position of the positioning lug 31 are consistent with those of the positioning groove 13, so that when the light scattering component 3 is installed in the lower shell 1, the positioning lug 31 can be clamped in the positioning groove 13, and the positioning installation of the light scattering component 3 in the lower shell 1 is realized. The light guide plate 32 of the light diffusion member 3 and the positioning lugs 31 of the other films may be provided in a uniform structure, sharing the same positioning groove 13 in the lower case 1; the light guide plate 32 of the light scattering component 3 and the positioning lugs 31 of other membranes can also be respectively arranged, and the corresponding positioning grooves 13 are respectively arranged in the lower shell 1 to respectively match the light guide plate 32 and the positioning lugs 31 of other membranes; in the present embodiment, the latter structure is adopted, in which the two positioning grooves 13 symmetrically arranged at the upper left and right in fig. 2 are used to engage with the positioning lugs 31 on the light guide plate 32, and the one positioning groove 13 arranged at the lower left in fig. 2 is used to engage with the positioning lugs 31 on the diaphragm.

Referring to fig. 1, 2, 6 and 7, a reflective film 38, a light guide plate 32, a light-diffusing film 33, a lower light-adding film 34, a middle light-adding film 35 and an upper light-adding film 36 are sequentially stacked in the lower case 1 from bottom to top. The outsides of the light-diffusing film 33, the lower light-adding film 34, the middle light-adding film 35 and the upper light-adding film 36 are respectively provided with a fixing protrusion 37, and the fixing protrusions 37 on the outsides of the light-diffusing film 33, the lower light-adding film 34, the middle light-adding film 35 and the upper light-adding film 36 are arranged in a staggered mode, so that the fixing protrusions 37 on the outsides of the light-diffusing film 33, the lower light-adding film 34, the middle light-adding film 35 and the upper light-adding film 36 can all contact the step structure on the inner. The four-stage step structure 14 is arranged in the lower shell 1, the fixing protrusions 37 at the outer sides of the light-diffusing film 33, the lower light-adding film 34, the middle light-adding film 35 and the upper light-adding film 36 are respectively bonded and fixed on one step of the step structure 14, the two-sided adhesive tape 71 can be bonded, and the two-sided adhesive tape 71 is bonded on the step structure 14 along with the shape of the four-stage step. Adopt above-mentioned structure can just fix four diaphragms in inferior valve 1 through an adhesive tape bonding for the diaphragm is fixed easily and convenient in the bonding of inferior valve.

Referring to fig. 1, 6, 8 and 9, in each structure of the light scattering assembly 3, the light guide plate 32 is thick and heavy, and in order to ensure the stability and reliability of the installation of the light guide plate 32 in the lower case 1, the clearance between the light guide plate 32 and the lower case 1 is preferably provided with a soft cushion block, and the light guide plate 32 is fastened in the lower case 1 through a soft cushion block, so that the light guide plate 32 can be prevented from shaking in the lower case, and the stability and reliability of the installation of the light guide plate 32 in the lower case 1 can be ensured. The inner side of the groove structure 41 on the back of the upper frame 4 is preferably attached with a silica gel single-sided adhesive 72, the non-adhesive surface of the silica gel single-sided adhesive 72 is abutted against the upper surface of the light guide plate 32, and the compressed light guide plate is further compressed in the lower shell 1; and a certain gap is formed between the light guide plate and the back of the upper frame 4 to accommodate each diaphragm, so that the diaphragm is prevented from being damaged due to too large pressure of the upper frame 4 on the diaphragm.

Referring to fig. 8 and 9, the soft pad may adopt a specific structure including a linear pad 51 and an L-shaped pad 52, the linear pad 51 is clamped at the outer side of the side edge of the light guide plate 32, and the L-shaped pad 52 is clamped at the corner of the light guide plate 32; so that the light guide plate 32 is stably clamped in the lower case 1 by the combination of the in-line spacer 51 and the L-shaped spacer 52. The arc structure 521 is arranged at the inner corner of the L-shaped cushion block 52, so that the L-shaped cushion block 52 can be conveniently molded, and the situation that the installation of the light guide plate is affected due to the fact that the right angle at the inner corner of the L-shaped cushion block 52 is not standard is avoided; the arc structure 521 at the inner corner of the L-shaped pad 52 can be integrally formed during the manufacture of the L-shaped pad 52, or can be cut and formed at a later stage.

Referring to fig. 1 and 3, an insulating adhesive tape 6 is preferably attached to the inner side of the lower case 1 and below the side-in light bar 2, so as to prevent the side-in light bar 2 from contacting the bottom of the inner side of the metal lower case 1 to cause short circuit. Inferior valve 1 is provided with trompil 15, the connector 21 of formula lamp strip 2 of going into to the 1 back of inferior valve is worn out to trompil 15 from the trompil, and the power cord can insert the interior power supply of formula lamp strip 2 of going into of connector 21 in the trompil 15.

Referring to fig. 1, a circle of buffer rubber pad 43 is arranged at the top of the upper frame 4, a silica gel pad can be adopted, and the buffer rubber pad 43 is arranged to facilitate the installation of the liquid crystal module on the upper portion of the upper frame 4. All be provided with L shape cushion 44 in upper ledge 4 top four corners to protect the LCD module in the four corners of LCD module when the LCD module installation, avoid the LCD module four corners to collide with the upper ledge 4 of stereoplasm and damage. The inner side edge of the side retaining wall 46 on the upper frame 4 is preferably made into a round angle, and is also bonded with a protective adhesive to prevent the FPC of the liquid crystal module from being cut by the sharp edge of the upper frame 4 when the FPC extends out of the backlight module from the side.

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 (10)

1. The utility model provides an assembly reliable and stable formula backlight unit inclines which characterized in that: the LED lamp strip comprises a lower shell (1), a side-entering type lamp strip (2), a light scattering component (3) and an upper frame (4), wherein the side-entering type lamp strip (2) is fixed on the inner side wall of the lower shell (1), the light scattering component (3) is fixed in the lower shell (1), and the upper frame (4) is fixed on the upper side of the lower shell (1); inferior valve (1) and upper ledge (4) are the foundry goods, the upside of inferior valve (1) is provided with round protruding structure (11), the downside of upper ledge (4) is provided with round groove structure (41), protruding structure (11) and groove structure (41) looks adaptation, protruding structure (11) are pegged graft in groove structure (41).

2. The edge-type backlight module of claim 1, wherein: the upper side of the lower shell (1) is further provided with a positioning column (12), the lower side of the upper frame (4) is further provided with a positioning hole (42), the positioning column (12) is matched with the positioning hole (42), and the positioning column (12) is inserted into the positioning hole (42).

3. The edge-type backlight module of claim 2, wherein: the lower shell (1) and the upper frame (4) are fixed together through screw threads.

4. The side-entry backlight module of any one of claims 1 to 3, wherein: the light scattering component (3) is provided with a positioning lug (31) on the outer side, the lower shell (1) is provided with a positioning groove (13) on the inner side, the positioning lug (31) is matched with the positioning groove (13), and the positioning lug (31) is clamped in the positioning groove (13).

5. The edge-type backlight module of claim 4, wherein: the light scattering component (3) comprises a light guide plate (32), a light diffusion film (33), a lower light enhancement film (34), a middle light enhancement film (35) and an upper light enhancement film (36) which are sequentially stacked, fixing protrusions (37) are arranged on the outer sides of the light diffusion film (33), the lower light enhancement film (34), the middle light enhancement film (35) and the upper light enhancement film (36), and the fixing protrusions (37) on the outer sides of the light diffusion film (33), the lower light enhancement film (34), the middle light enhancement film (35) and the upper light enhancement film (36) are arranged in a staggered mode; a four-stage step structure (14) is arranged in the lower shell (1), and a light-diffusing film (33), a lower light-adding film (34), a middle light-adding film (35) and a fixing protrusion (37) on the outer side of an upper light-adding film (36) are respectively bonded and fixed on one step of the step structure (14).

6. The edge-type backlight module of claim 5, wherein: the light guide plate (32) is clamped with the soft cushion block between the lower shell (1), and the light guide plate (32) is clamped in the lower shell (1) through the soft cushion block.

7. The edge-type backlight module of claim 6, wherein: the soft cushion block comprises a linear cushion block (51) and an L-shaped cushion block (52), the linear cushion block (51) is clamped at the outer side of the side edge of the light guide plate (32), and the L-shaped cushion block (52) is clamped at the corner of the light guide plate (32); and an arc structure (521) is arranged at the corner of the inner side of the L-shaped cushion block (52).

8. The edge-type backlight module of claim 4, wherein: insulating adhesive tapes (6) are attached to the inner side of the lower shell (1) and the lower position of the side-in type light bar (2).

9. The edge-type backlight module of claim 8, wherein: inferior valve (1) is provided with trompil (15), connector (21) of formula lamp strip (2) are gone out to inferior valve (1) back from trompil (15) to the side income.

10. The edge-type backlight module of claim 4, wherein: the top of the upper frame (4) is provided with a circle of buffer rubber pads (43), and four corners of the top of the upper frame (4) are provided with L-shaped rubber pads (44).

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