CN212965694U

CN212965694U - Anti-rotation circular backlight module

Info

Publication number: CN212965694U
Application number: CN202021952202.3U
Authority: CN
Inventors: 刘珍霞; 姚志图; 罗增昌; 杨楠
Original assignee: WAI CHI OPTOELECTRONIC Ltd
Current assignee: WAI CHI OPTOELECTRONIC Ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-04-13
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses an anti-rotation circular backlight module, which comprises a lower shell, a side-in light source, a light scattering component and an upper frame, wherein the side-in light source is fixed on the inner side wall of the lower shell; the inner side wall of the upper frame is provided with a limiting convex column and a limiting convex strip, the side wall of the lower shell is provided with a limiting opening, the limiting convex column is matched with the limiting opening, and the limiting convex column is inserted in the limiting opening; the limiting convex strip is abutted to the outer side of the side wall of the lower shell. The utility model discloses a structural design between inferior valve and the upper ledge can avoid taking place relative rotation between inferior valve and the upper ledge to guarantee the stability of installation between inferior valve and the upper ledge, and then guarantee backlight unit and shake, jolt the steady operation under the special environment such as.

Description

Anti-rotation circular backlight module

Technical Field

The utility model relates to a backlight unit technical field, concretely relates to prevent circular backlight unit of rotation.

Background

The backlight module is a structure for providing a surface light source for other light emitting devices from the back, the shape of the backlight module is set according to the shape of the light emitting device, and a circular light emitting device needs to be matched with a circular backlight module, for example, many light emitting devices (such as an instrument panel) in vehicle-mounted display are set to be circular, so the corresponding backlight module also needs to be set to be circular. The service environment of the vehicle-mounted display device is special, the vehicle is in a motion state for a long time, the backlight module of the vehicle-mounted display device is in a jolt and shake vehicle for a long time, therefore, the backlight module of the vehicle-mounted display device is required to be connected with each part more stably, rotation cannot occur, moving and other defects are avoided, but the lower shell and the upper frame of the existing circular backlight module are circular, the upper frame is easy to rotate relatively between the lower shell when being installed on the lower shell, the long-term relative rotation influences the stability of the installation of the upper frame on the lower shell, thereby influencing the light guide plate of the backlight module, the diaphragm, the stability of installation of a side-entering light source and the like, and finally, the.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem take place pivoted technical problem easily on the inferior valve to circular backlight unit's upper frame among the background art, provide a circular backlight unit who prevents rotating that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a rotation-proof circular backlight module comprises a lower shell, a side-in light source, a light scattering component and an upper frame, wherein the side-in light source is fixed on the inner side wall of the lower shell; the inner side wall of the upper frame is provided with a limiting convex column and a limiting convex strip, the side wall of the lower shell is provided with a limiting opening, the limiting convex column is matched with the limiting opening, and the limiting convex column is inserted in the limiting opening; the limiting convex strip is abutted to the outer side of the side wall of the lower shell.

Further, spacing sand grip includes the vertical bar structure and splits the structure to one side, the vertical bar structure links together with the structure to one side, vertical bar structure axial fixity is in the inboard of last frame inside wall, it fixes in the outside of last frame inside wall to one side to split structure axial.

Furthermore, at least two groups of limiting openings are formed in the side wall of the lower shell, and at least two groups of limiting convex columns are arranged on the inner side wall of the upper frame; spacing sand grip sets up three groups at least, and evenly sets up on the upper ledge inside wall.

Furthermore, the side wall of the lower shell comprises a straight edge and a curved edge, the straight edge and the curved edge are arranged at intervals, and the limiting opening is arranged between the straight edge and the curved edge.

Further, the light scattering assembly comprises a light guide plate, the shape of the light guide plate is consistent with that of the bottom of the inner side of the lower shell, and the light guide plate is positioned and installed at the bottom of the inner side of the lower shell; the outer side of the light guide plate is provided with a positioning lug, and the positioning opening and the positioning lug are abutted against the inner side wall of the lower shell or the side-entering light source.

Further, the light scattering assembly further comprises a reflective film, the reflective film is bonded to the bottom of the inner side of the lower shell, and the light guide plate is stacked on the reflective film; the shape of the reflective film is consistent with the shape of the bottom of the inner side of the lower shell.

Further, the light scattering assembly further comprises a light-diffusing film, a lower light-adding film and an upper light-adding film, and the light-diffusing film, the lower light-adding film and the upper light-adding film are sequentially stacked on the light guide plate; the light-diffusing film, the lower light-diffusing film and the upper light-diffusing film are respectively provided with a positioning lug on the outer side, the side wall of the lower shell is provided with a positioning notch, the positioning lugs are matched with the positioning notches, and the positioning lugs are inserted into the positioning notches.

Furthermore, two light sources are arranged on the side-in light source, and a black ink ribbon is printed on one side, close to the side-in light source, of the light-diffusing film in a silk-screen mode; the middle part of one side of the light-diffusing film close to the side-entering light source is provided with a notch.

The utility model discloses the beneficial effect who realizes mainly has following several: be provided with spacing projection on the upper ledge inside wall, be provided with spacing opening on the inferior valve lateral wall, spacing projection can be pegged graft in spacing opening just to through spacing projection and spacing open-ended limiting displacement, make upper ledge and inferior valve fixed together can not take place relative rotation, guaranteed backlight unit jolt stability of using under the adverse service environment such as rocking. In addition, the limiting convex strips on the upper frame abut against the outer side of the side wall of the lower shell, the upper frame and the lower shell are further clamped together, relative rotation between the upper frame and the lower shell can be further avoided, and therefore the stability of the backlight module in use under severe use environments such as jolting and shaking is further guaranteed.

Drawings

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

fig. 2 is a schematic structural view of a lower case of a rotation-preventing circular backlight module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a lateral light source of a circular backlight module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a light guide plate of a circular backlight module with rotation prevention according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a reflection film of a circular backlight module according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a light-diffusing film of a rotation-preventing circular backlight module according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an upper frame of a circular backlight module with rotation prevention according to an embodiment of the present invention;

fig. 8 is an enlarged schematic view of a portion a in fig. 7.

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 8, an anti-rotation circular backlight module can prevent the lower case and the upper frame from rotating relatively through the structural design between the lower case and the upper frame, so as to ensure the stability of installation between the lower case and the upper frame, and further ensure the stable operation of the backlight module in special environments such as vibration and jolt. The circular backlight module comprises a lower shell 1, a side-in light source 2, a light scattering component 3 and an upper frame 4, wherein the lower shell 1, the side-in light source 2, the light scattering component 3 and the upper frame 4 are of structures with approximate circular shapes, and an opening in the upper frame 4 is circular, so that the backlight module assembled finally emits circular light. Inferior valve 1 and upper frame 4 are whole backlight unit's support mounting structure, and side income formula light source 2 bonds through heat-conducting glue 23 and fixes on inferior valve 1's inside wall, and light scattering component 3 installs in inferior valve 1's cavity, and upper frame 4 lock is fixed on inferior valve 1, and is pressed admittedly light scattering component 3 in inferior valve 1. The lower case 1 may be generally formed of a metal through press, and the upper case 4 may be generally formed of a plastic through injection molding. Side income formula light source 2 generally adopts LED lamp strip, welds LED lamp 21 on FPC, bonds FPC during the installation and fixes on inferior valve 1's inside wall, and FPC's the end 22 that stretches out the inferior valve outside in the preformed hole of inferior valve 1 bottom, and the convenience is connected with external power source, and FPC's the end 22 that stretches out still glues 24 bonding through the protection and fixes outside the inferior valve.

Referring to fig. 1, 2, 7 and 8, an anti-rotation structure is disposed between the upper frame and the lower case to prevent relative rotation therebetween. Be provided with spacing projection 41 and spacing sand grip 42 on the 4 inside walls of upper ledge, be provided with spacing opening 11 on the inferior valve 1 lateral wall, spacing projection 41 and spacing opening 11 looks adaptation, spacing projection 41 is unanimous with spacing opening 11's size, appearance and position promptly for spacing projection 41 can peg graft just in spacing opening 11, thereby through spacing projection 41 and spacing opening 11's limiting displacement, makes the upper ledge fixed together with the inferior valve and can not take place relative rotation, has guaranteed the stability that backlight unit used under the adverse service environment such as jolt and rock. In addition, the limiting convex strip 42 on the upper frame 4 abuts against the outer side of the side wall of the lower shell 1, the upper frame and the lower shell are further clamped together, relative rotation between the upper frame and the lower shell can be further avoided, and therefore the stability of the backlight module in use in severe use environments such as jolting and shaking is further guaranteed. Spacing projection 41 and spacing sand grip 42 can be integrated into one piece when upper frame 4 injection moulding, and spacing opening 11 can be integrative stamping forming when inferior valve 1 stamping forming.

Referring to fig. 1, 7 and 8, as a further preferred solution, the limiting rib 42 preferably adopts the following structure: including vertical bar structure 421 and oblique structure 422, vertical bar structure 421 links together with oblique structure 422, vertical bar structure 421 axial fixity in the inboard of 4 inside walls of upper ledge, oblique structure 422 axial fixity in the outside of 4 inside walls of upper ledge to 4 inside walls of upper ledge can guide through oblique structure 422 when inferior valve 1 outside, thereby quick lock is installed on inferior valve 1, improves backlight unit's equipment production efficiency. In addition, the lower shell 1 and the upper frame 4 can be connected through a buckle structure, preferably, the fixing glue 61 is adhered, the lower shell and the upper frame are further adhered and fixed together, the shading glue 62 is adhered between the lower shell and the upper frame, and light leakage on the side face of the backlight module is avoided.

As a further preferred scheme, at least two sets of limiting openings 11 are preferably arranged on the side wall of the lower casing 1, and at least two sets of limiting convex columns 41 are preferably arranged on the side wall of the upper frame 4, so that the more than two sets of limiting openings 11 and the limiting convex columns 41 are matched to better limit the installation between the lower casing and the upper frame, and the relative rotation between the lower casing and the upper frame is avoided. Spacing sand grip 42 sets up three groups at least, and evenly sets up on 4 inside walls of upper ledge to even between upper ledge and inferior valve with both chucking, guarantee the precision of both installations.

Referring to fig. 2, in order to facilitate the press forming, the lower case 1 adopts the following structure: the side wall of the lower shell 1 comprises a straight edge 12 and a curved edge 13, and the straight edge 12 and the curved edge 13 are arranged alternately, so that the appearance of the lower shell 1 is circular on the whole, and the circular backlight module is convenient to manufacture. An opening is reserved between the straight edge 12 and the curved edge 13 during punch forming to avoid mutual extrusion of the straight edge 12 and the curved edge 13 at two sides during punching, and the reserved opening can be used as a limiting opening 11, so that the existing reserved opening is directly used as the limiting opening, the manufacturing steps of the lower shell can be simplified, and the production cost of the backlight module is reduced.

Referring to fig. 1 to 8, the light scattering component 3 includes a reflective film 32, a light guide plate 31, a light diffusing film 33, a lower light-adding film 34 and an upper light-adding film 35, the reflective film 32, the light guide plate 31, the light diffusing film 33, the lower light-adding film 34 and the upper light-adding film 35 are sequentially overlapped in the lower casing 1, and the reflective film 32, the light guide plate 31, the light diffusing film 33, the shapes of the lower light-adding film 34 and the upper light-adding film 35 are all consistent with the shape of the inner side bottom of the lower casing 1, and are both structures with curved edges and straight edges, so that the backlight module is not easy to rotate relatively between the lower casing when being installed in the inner side of the lower casing 1, and.

Referring to fig. 1 and 4, the outer side of the light guide plate 31 is provided with a positioning bump 311, and the positioning opening 14 and the positioning bump 311 are abutted on the inner sidewall of the lower case 1 or the side-in type light source 2, so that a specific distance is maintained between the light guide plate and the side-in type light source 2, and the light guide plate is prevented from colliding and damaging the lamp 21 of the side-in type light source 2. In addition, the outer side of the light guide plate 31 is provided with a positioning block 312, the outer side wall of the lower case 1 is correspondingly provided with a positioning groove 14, and the positioning block 312 is inserted into the positioning groove 14 when the light guide plate is installed in the lower case, so that relative rotation between the light guide plate and the lower case is further avoided.

Referring to fig. 5, the reflective film 32 is adhered to the bottom of the inner side of the lower case 1 through a double-sided adhesive tape, the light-diffusing film 33, the lower light-intensifying film 34 and the upper light-intensifying film 35 are provided with positioning lugs 36 on the outer sides thereof, the side wall of the lower case 1 is provided with positioning notches 15, the positioning lugs 36 are matched with the positioning notches 15, namely, the positioning lugs 36 are consistent with the positioning notches 15 in size, shape and position, so that the positioning lugs 36 can be just inserted into the positioning notches 15, the light-diffusing film 33, the lower light-intensifying film 34 and the upper light-intensifying film 35 can be further positioned and installed in the lower case 1 through the positioning lugs 36 and the positioning notches 15, thereby avoiding relative rotation between the film and the lower case and improving the stability of the backlight module structure.

Referring to fig. 1, 4 and 6, in order to improve the uniformity of light emission of each circular module, two LED lamps 21 are arranged on the side-in light source 2, a black ink ribbon 331 is silk-screened on one side of the light-diffusing film 33 close to the side-in light source 2, and when the light emission distance of the LED lamps is 1.4-1.6 mm from the viewing area, the width of the black ink ribbon 331 can be set to any value between 0.6mm and 0.8mm, and is preferably set to 0.7 mm; the central part of the light-diffusing film 33 close to one side of the side-entering light source 2 is provided with a notch 332, so that the uniform circular light-emitting surface of the backlight module can emit light, and bright spots and dark spots close to the side-entering light source 2 are avoided.

Referring to fig. 1, in order to facilitate the installation of the liquid crystal module on the backlight module, the top of the upper frame 4 is provided with foam adhesive 51 and foam adhesive 52, which can support the liquid crystal module when the liquid crystal module is installed. And still bond at the backlight unit top and have from type membrane 53, come the protection backlight unit before backlight unit installation liquid crystal module, avoid it to be polluted by dust etc. from type membrane 53 can tear when liquid crystal module installation.

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 prevent circular backlight unit of rotation which characterized in that: the lateral light source is characterized by comprising a lower shell (1), a lateral light source (2), a light scattering component (3) and an upper frame (4), wherein the lateral light source (2) is fixed on the inner side wall of the lower shell (1), the light scattering component (3) is installed in the lower shell (1), and the upper frame (4) is fixed on the lower shell (1) and presses and fixes the light scattering component (3) in the lower shell (1);

the inner side wall of the upper frame (4) is provided with a limiting convex column (41) and a limiting convex strip (42), the side wall of the lower shell (1) is provided with a limiting opening (11), the limiting convex column (41) is matched with the limiting opening (11), and the limiting convex column (41) is inserted into the limiting opening (11); the limiting convex strips (42) are abutted to the outer side of the side wall of the lower shell (1).

2. The anti-rotation circular backlight module according to claim 1, wherein: spacing sand grip (42) are including vertical bar structure (421) and oblique structure (422), vertical bar structure (421) link together with oblique structure (422), vertical bar structure (421) axial fixity is in the inboard of last frame (4) inside wall, oblique structure (422) axial fixity is in the outside of last frame (4) inside wall.

3. The anti-rotation circular backlight module according to claim 2, wherein: at least two groups of limiting openings (11) are formed in the side wall of the lower shell (1), and at least two groups of limiting convex columns (41) are formed in the inner side wall of the upper frame (4); spacing sand grip (42) set up three groups at least, and evenly set up on upper ledge (4) inside wall.

4. The anti-rotation circular backlight module according to any one of claims 1 to 3, wherein: the side wall of the lower shell (1) comprises straight edges (12) and curved edges (13), the straight edges (12) and the curved edges (13) are arranged at intervals, and the limiting opening (11) is arranged between the straight edges (12) and the curved edges (13).

5. The anti-rotation circular backlight module according to claim 4, wherein: the light scattering component (3) comprises a light guide plate (31), the shape of the light guide plate (31) is consistent with the shape of the bottom of the inner side of the lower shell (1), and the light guide plate (31) is positioned and installed at the bottom of the inner side of the lower shell (1); the outer side of the light guide plate (31) is provided with a positioning bump (311), and the positioning opening (14) and the positioning bump (311) are abutted on the inner side wall of the lower shell (1) or the side-entering light source (2).

6. The anti-rotation circular backlight module according to claim 5, wherein: the light scattering assembly (3) further comprises a reflective film (32), the reflective film (32) is bonded to the bottom of the inner side of the lower shell (1), and the light guide plate (31) is stacked on the reflective film (32); the shape of the reflective film (32) is consistent with the shape of the bottom of the inner side of the lower shell (1).

7. The anti-rotation circular backlight module according to claim 6, wherein: the light scattering component (3) further comprises a light diffusion film (33), a lower light enhancement film (34) and an upper light enhancement film (35), wherein the light diffusion film (33), the lower light enhancement film (34) and the upper light enhancement film (35) are sequentially stacked on the light guide plate (31); the light diffusing film (33), the lower light diffusing film (34) and the upper light diffusing film (35) are respectively provided with a positioning lug (36) on the outer side, the side wall of the lower casing (1) is provided with a positioning notch (15), the positioning lug (36) is matched with the positioning notch (15), and the positioning lug (36) is inserted into the positioning notch (15).

8. The anti-rotation circular backlight module according to claim 7, wherein: two light sources (21) are arranged on the side-in light source (2), and a black ink ribbon (331) is printed on one side, close to the side-in light source (2), of the light-diffusing film (33) in a silk-screen mode; the light-diffusing film (33) is provided with a notch (332) in the middle of one side close to the side-in light source (2).