CN210038400U

CN210038400U - Side-in backlight module comprising cushion block structure

Info

Publication number: CN210038400U
Application number: CN201920711705.2U
Authority: CN
Inventors: 罗增昌; 龚科; 姚志图; 刘启玉; 彭环洋
Original assignee: HUIZHOU WEIZHI ELECTRONICS CO Ltd
Current assignee: HUIZHOU WEIZHI ELECTRONICS CO Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-02-07
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a side-in type backlight module comprising a cushion block structure, which comprises a back shell (1), a light source (2), a light scattering structure (3) and a front frame (4); the light source (2) is arranged on the inner side surface of the back shell (1), the light scattering structure (3) is arranged in the back shell (1), and the front frame (4) is fixed on the back shell (1); the light scattering structure (3) comprises a light guide plate (31), the light guide plate (31) is arranged in the back shell (1), the outer side face of the light guide plate (31) is clamped and fixed with the inner side face of the back shell (1) through a cushion block structure (5), and the cushion block structure comprises a soft cushion block and a hard cushion block. The utility model is used for the backlight of display.

Description

Side-in backlight module comprising cushion block structure

Technical Field

The utility model relates to a backlight technical field, concretely relates to side income formula backlight unit including cushion structure.

Background

The display device is an important information display medium, and information acquisition and interaction from the display device become an important information communication mode. The display device comprises a mobile phone, a television, a computer and the like, and also comprises a vehicle-mounted display, a mechanical equipment display and the like, and the difference is that the vehicle-mounted display and the mechanical equipment display are used in mobile or movable equipment. The vehicle-mounted display needs to move and vibrate together with the vehicle; the display of the machine equipment needs to move together with the equipment when the equipment is transported, and also needs to bear the influence of the operation of the equipment when the equipment is operated, such as the display on a lathe. Backlight unit is display device important part, and the light guide plate is the important part of side income formula backlight unit, but light guide plate mounting structure is simple among the present backlight unit, shifts easily even damage in the service environment of vibration or removal, influences backlight unit's visual effect, leads to backlight unit to be unable to use even.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be not enough among the vibration background art, provide the side income formula backlight unit that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a side-in backlight module comprising a cushion block structure comprises a back shell, a light source, a light scattering structure and a front frame; the light source is arranged on the inner side surface of the back shell, the light scattering structure is arranged in the back shell, and the front frame is fixed on the back shell; the light scattering structure comprises a light guide plate, the light guide plate is arranged in the back shell, the outer side face of the light guide plate is clamped and fixed with the inner side face of the back shell through a cushion block structure, and the cushion block structure comprises a soft cushion block and a hard cushion block.

Furthermore, the cushion block structure comprises a strip-shaped cushion block and an L-shaped cushion block, the strip-shaped cushion block is clamped and fixed outside the side edge of the light guide plate, and the L-shaped cushion block is clamped and fixed outside the corner angle of the light guide plate.

Furthermore, a step structure is arranged on the inner side of the strip-shaped cushion block and/or the L-shaped cushion block.

Furthermore, the strip-shaped cushion block and the L-shaped cushion block are both adhered to the inner side face of the back shell, and a positioning structure is arranged on the inner side face of the back shell.

Furthermore, the light scattering structure also comprises a membrane assembly, and the membrane assembly is stacked on the light guide plate; the light guide plate is provided with a positioning boss, and a positioning opening matched with the positioning boss is formed in the diaphragm assembly.

Further, the transverse section of the positioning boss is of a polygonal structure.

Further, the membrane assembly is fixedly bonded on the light guide plate.

Further, the front frame is of a groove-shaped structure.

The utility model discloses the beneficial effect who realizes mainly has following several: the outer side face of the light guide plate of the backlight module is fixedly clamped with the inner side face of the back shell through the cushion block structure, so that the light guide plate is more stably fixed in the back shell. The cushion block structure comprises a soft cushion block and a hard cushion block; the soft cushion block mainly plays a role in clamping and buffering the light guide plate; the hard cushion block is mainly used for clamping the light guide plate on the side surface of the light guide plate, so that the light guide plate is ensured to be installed on the vertical side of the back shell stably enough; the cushion structure adopts the mode that soft cushion and hard cushion closed, can guarantee that the light guide plate has certain buffer distance under the vibration impact, makes buffer distance can not be too big again to the protection light guide plate avoids its and dorsal scale side collision, guarantees that the light guide plate can not damage under the vibration impact by a wide margin yet, and the display of this backlight unit preparation from this can be better adaptation vehicle-mounted, vibration such as machinery, the environment of jolting. In addition, the soft cushion block and the hard cushion block can be arranged above the opening of the back shell to block the hole, so that light leakage of the backlight module is avoided, and the brightness of the backlight module is improved; and soft cushion and/or hard cushion can the butt install in the side facade outside of reflector plate, have the effect of fixed reflector plate, avoid the light leak and the luminance reduction that the reflector plate removed the production.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural view of an L-shaped spacer of a side-in type backlight module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a front frame of a side-in type backlight module according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a back surface of a side-in type 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 5, a side-in type backlight module including a spacer structure is used as a backlight source of a display. The side-in backlight module comprises a back shell 1, a light source 2, a light diffusion structure 3 and a front frame 4. The back shell 1 is a structure with a bottom at the lower part and side vertical edges at the periphery, and is preferably made of metal materials with better heat dissipation effect; the back case 1 may be formed by punching, die casting, or the like. The light source 2 is a light bar, and can be a flexible light bar made of FPC and LED, and also can be a hard light bar made of conventional PCB and LED. The front frame 4 is usually made of plastic parts and can be formed by injection molding. The light source 2 is arranged on the inner side of the back shell 1. The light scattering structure 3 is arranged in the back shell 1, and all the layers of structures are sequentially stacked. The front frame 4 is fixed on the back shell 1 and can be fixedly connected in common modes such as clamping of a buckle structure, screw connection and the like.

Referring to fig. 1 and 2, the light diffusion structure 3 includes a light guide plate 31, a reflector 32, and other film assemblies, which may be configured according to the requirements of module brightness and visual effect. The other film assembly in this embodiment includes a light-diffusing film 33, a lower light-adding film 34, an upper light-adding film 35 and a composite film 36, the reflective sheet 32 is adhered to the bottom of the inner side of the back case 1, and the light guide plate 31, the light-diffusing film 33, the lower light-adding film 34, the upper light-adding film 35 and the composite film 36 are sequentially stacked on the reflective sheet 32.

Referring to fig. 1 and 2, the light guide plate 31 is provided with a positioning boss 311 disposed generally at an outer position of an upper surface of the light guide plate 31; the light diffusing film 33, the lower light diffusing film 34, the upper light diffusing film 35 and the composite film 36 are provided with positioning openings 37 matched with the positioning bosses 311, and can adopt notch structures on the side edges of the films, so that the light diffusing film 33, the lower light diffusing film 34, the upper light diffusing film 35 and the composite film 36 can be installed on the light guide plate 31 through the positioning openings 37 and the positioning bosses 311, and the film assembly can be stably installed due to the pressing and fixing effect of the front frame 4. The transverse section of the positioning boss 311 is of a polygonal structure with edges, such as a trapezoidal structure, each side of the section of the existing positioning boss 311 is generally of an arc-shaped transition structure, and compared with the existing positioning boss 311, the positioning boss 311 of the polygonal structure can avoid bright spots generated near the positioning boss 311 during the operation of the module, so that the visual effect of the backlight module is optimized.

Referring to fig. 1 and 2, in order to further enhance the stability of the fixing of the film on the light guide plate, the film assembly is further fixed on the light guide plate 31 by means of bonding. The light guide plate 31 is provided with a step structure 312 with different heights, the light-diffusing film 33, the lower light-adding film 34 and the upper light-adding film 35 are provided with openings 39 which are corresponding in position and are sequentially shortened, one surface of the double-sided adhesive tape 38 is bonded on the step structure 312, and the other surface of the double-sided adhesive tape 38 is bonded with the light-diffusing film 33, the lower light-adding film 34, the upper light-adding film 35 and the composite film 36. The opening on the lower membrane is larger than the opening on the last membrane, so that the double-sided adhesive tape 38 can penetrate through the lower membrane to be bonded with the upper membrane; the steps of different heights of the step structure 312 are respectively matched with the diaphragms at different heights, so that the diaphragm bonding is smoother. Through the structure, one double-sided adhesive tape can be bonded on the light guide plate at one time, and the assembly is more convenient and faster.

Referring to fig. 1 and 3, the outer side surface of the light guide plate 31 is clamped and fixed with the inner side surface of the back case 1 through the spacer structure 5, so that the light guide plate is more stably fixed in the back case. The cushion block structure comprises a soft cushion block and a hard cushion block, wherein the soft cushion block and the hard cushion block are soft cushion blocks, the softness is different, and the hard cushion block is harder than the soft cushion block; both soft and hard pads can be selected from commercially available silica gel blocks of different hardness. The soft cushion block mainly plays a role in clamping and buffering the light guide plate; the hard cushion block is mainly used for clamping the light guide plate at the side edge of the light guide plate, so that the light guide plate is ensured to be installed stably enough on the vertical side of the back shell, and meanwhile, the hard cushion block is still made of a relatively soft material and also has a certain buffering effect; the cushion structure adopts the mode that soft cushion and hard cushion closed, can guarantee that the light guide plate has certain buffer distance under the vibration impact, makes buffer distance can not be too big again to the protection light guide plate avoids its and dorsal scale side collision, guarantees that the light guide plate can not damage under the vibration impact by a wide margin yet, and the display of this backlight unit preparation from this can be better adaptation vehicle-mounted, vibration such as machinery, the environment of jolting. The soft cushion blocks and the hard cushion blocks are preferably arranged alternately in sequence, and the combination mode can further protect the light guide plate. The spacer structure is preferably disposed on three sides of the light guide plate except the light incident side.

Referring to fig. 1 and 3, according to the shape, the spacer structure 5 includes a strip spacer 51 and an L-shaped spacer 52, the strip spacer 51 is fixed outside the side edge of the light guide plate 31, and the L-shaped spacer 52 is fixed outside the corner of the light guide plate 31. The strip-shaped cushion block 51 and the L-shaped cushion block 52 are both adhered to the inner side surface of the back shell 1, and a positioning structure, for example, a positioning imprinting line is arranged on the inner side surface of the back shell 1 as a positioning structure, so that the strip-shaped cushion block 51 and the L-shaped cushion block 52 can be conveniently and fixedly mounted on the back shell. When the light guide plate is installed, the strip-shaped cushion block 51 and the L-shaped cushion block 52 are firstly bonded on the back shell, and then the light guide plate is installed. The inner side of the strip-shaped spacer 51 and/or the L-shaped spacer 52 is preferably provided with a step structure 521, such as the step structure in fig. 3, or may be provided with a plurality of small convex hulls, so that the light guide plate is more easily clamped into the space inside the spacer when being installed.

Regarding the color, the strip-shaped cushion block 51 and the L-shaped cushion block 52 are preferably arranged in a way that a black cushion block is matched with a white cushion block, and black materials can absorb light and shade light, so that the partial over-brightness of the front surface of the backlight module can be avoided, and holes on a back shell can be covered to avoid light leakage of the backlight module; meanwhile, the white cushion block is partially adopted to avoid the generation of shadows at the partial position of the backlight module, and the visual effect of the backlight module is ensured.

Referring to fig. 1, 2 and 5, the light source 2 may be fixed by bonding a double-sided thermal adhesive tape 21, and the light source 2 may be fixed on a long side or a short side of the back case 1, which is selected according to the brightness requirement of the backlight module, and the structure in which the light source 2 is disposed on the long side of the back case 1 is shown in the figure. The extending end 22 of the light source 2 extends out of the reserved hole of the back shell 1 to the back surface of the back shell 1, and the periphery of the hole is encapsulated, so that the extending end 22 is prevented from being scratched. The extending end 22 can be bent at the back of the back shell 1 according to position requirements, the extending end 22 is adhered along the line position through the double-sided adhesive tape 11, and the tail end is fixed through the masking tape 14. The back surface of the back shell 1 is also bonded with a conductive adhesive 13 and a double-sided adhesive 12, and the conductive adhesive 13 plays a role in leading out static electricity on the back shell 1 so as to prevent the static electricity from damaging components mounted on the back shell 1; the double-sided adhesive tape 12 facilitates the bonding and installation of other structures such as the main control board and the backlight module.

Referring to fig. 4, the front frame 4 is a groove-shaped structure 43, which may also be a shrinkage groove during injection molding, and this structure can facilitate injection molding and reduce the weight of the backlight module. The upper surface of the front frame 4 is provided with a buffer rubber pad 41, so that the liquid crystal display module is convenient to mount; the upper surface of the front frame 4 is also provided with a protective film 42 which can protect the backlight module before the liquid crystal display module is installed.

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 side income formula backlight unit including cushion structure which characterized in that: comprises a back shell (1), a light source (2), a light scattering structure (3) and a front frame (4); the light source (2) is arranged on the inner side surface of the back shell (1), the light scattering structure (3) is arranged in the back shell (1), and the front frame (4) is fixed on the back shell (1); the light scattering structure (3) comprises a light guide plate (31), the light guide plate (31) is arranged in the back shell (1), the outer side face of the light guide plate (31) is clamped and fixed with the inner side face of the back shell (1) through a cushion block structure (5), and the cushion block structure comprises a soft cushion block and a hard cushion block.

2. The edge-type backlight module comprising a spacer structure as claimed in claim 1, wherein: the cushion block structure (5) comprises a strip-shaped cushion block (51) and an L-shaped cushion block (52), the strip-shaped cushion block (51) is clamped outside the side edge of the light guide plate (31), and the L-shaped cushion block (52) is clamped outside the corner angle of the light guide plate (31).

3. The edge-lit backlight module of claim 2, wherein the spacer structure comprises: the inner side of the strip-shaped cushion block (51) and/or the L-shaped cushion block (52) is/are partially provided with a step structure.

4. The edge-lit backlight module of claim 3, wherein the spacer structure comprises: the long strip-shaped cushion block (51) and the L-shaped cushion block (52) are both adhered to the inner side face of the back shell (1), and a positioning structure is arranged on the inner side face of the back shell (1).

5. The edge-type backlight module comprising a spacer block structure as claimed in any one of claims 1 to 4, wherein: the light scattering structure (3) further comprises a membrane assembly, and the membrane assembly is stacked on the light guide plate (31); the light guide plate (31) is provided with a positioning boss (311), and a positioning opening (37) matched with the positioning boss (311) is formed in the membrane assembly.

6. The edge-lit backlight module of claim 5, wherein the spacer structure comprises: the transverse section of the positioning boss (311) is of a polygonal structure.

7. The edge-lit backlight module of claim 6, wherein the spacer structure comprises: the membrane assembly is bonded and fixed on the light guide plate (31).

8. The edge-type backlight module comprising a spacer structure as claimed in claim 1, wherein: the front frame (4) is of a groove-shaped structure.