CN211528867U - Backlight module with light guide plate inserted and installed - Google Patents

Abstract

The application discloses a backlight module for inserting and mounting a light guide plate, which comprises a back shell, a side-in light source, a light scattering component and a front frame, wherein the side-in light source is fixed on the inner side surface of the back shell; the light scattering component comprises a light guide plate, wherein a first inserting block and a second inserting block are arranged on the light guide plate, and the first inserting block and the second inserting block are oppositely arranged on two side surfaces of the light guide plate and are arranged on the outer side of the light guide plate; the back shell is provided with a first jack, the front frame is provided with a second jack, the first plug block is inserted into the first jack, and the second plug block is inserted into the second jack. The application is used for simplifying and installing the backlight module, and the rapid assembly of the backlight module is realized.

Description

Backlight module with light guide plate inserted and installed

Technical Field

The application relates to the technical field of backlight sources, in particular to a backlight module with a light guide plate inserted and installed.

Background

The backlight module is an important component of the liquid crystal display, provides white light for the liquid crystal panel from the back of the liquid crystal panel of the liquid crystal display, and can realize colorful display pictures after the white light is processed by the liquid crystal panel. The backlight module includes a direct type backlight module and a side type backlight module, and the side type backlight module is widely used by small and medium sized displays due to its characteristics of being light and thin. The light guide plate is an important component of the side-entry backlight module, and the side light is converted into backlight through the light guide plate, so that the backlight module of the surface light source is formed. Light guide plate weight is heavier relatively, need stable fix the stable in backlight unit's dorsal scale just can guarantee backlight unit's stable in structure, and present light guide plate is fixed generally to adopt soft cushion to fix, bonds the cushion through the double faced adhesive tape and fixes on each inside wall of dorsal scale, and then the light guide plate is fixed light guide plate integrated circuit board fastening all around at the light guide plate through soft cushion when installing in the dorsal scale. This kind of mode that adopts the fixed light guide plate of cushion needs to bond fixed soft cushion one by one in the backshell, still need counterpoint during the bonding to guarantee that the position of bonding is accurate, troublesome poeration when leading to backlight unit equipment is unfavorable for backlight unit equipment production efficiency's improvement, soft cushion also glues wrong (partial) position easily moreover to and there is the risk of bounceing in the cushion when backlight unit receives the vibration, influences the stability of backlight unit structure.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application was solved is to not enough in the background art, provides a backlight unit of light guide plate grafting installation.

In order to solve the technical problem, the technical scheme of the application is as follows: a backlight module with a light guide plate inserted and installed comprises a back shell, a side-in light source, a light scattering component and a front frame, wherein the side-in light source is fixed on the inner side surface of the back shell; the light scattering component comprises a light guide plate, wherein a first inserting block and a second inserting block are arranged on the light guide plate, and the first inserting block and the second inserting block are oppositely arranged on two side surfaces of the light guide plate and are arranged on the outer side of the light guide plate; the back shell is provided with a first jack, the front frame is provided with a second jack, the first plug block is inserted into the first jack, and the second plug block is inserted into the second jack.

Furthermore, the size of the first insertion block is larger than that of the second insertion block, and at least partial side surfaces of the first insertion block and the second insertion block are arc surfaces; the first jack is matched with the first plug block, and the second jack is matched with the second plug block.

Further, the first insertion block and the second insertion block are arranged on one side, close to the side-in light source, of the light guide plate; the front frame is provided with an inwards concave arc-shaped elastic sheet on one side far away from the side-in light source, the arc-shaped elastic sheet and the front frame are integrally formed, and the arc-shaped elastic sheet is abutted against the outer side of the light guide plate.

Furthermore, the light guide plate is provided with an arc-shaped protrusion on one side far away from the lateral light source, and the arc-shaped protrusion is abutted to the arc-shaped elastic sheet.

Furthermore, a first bump is arranged on the inner side of the arc-shaped elastic sheet and is abutted to the arc-shaped protrusion.

Furthermore, the light guide plate is also provided with a butt joint block, and the butt joint block is in butt joint with the inner side wall of the side-entering light source and/or the back shell.

Further, the light scattering component also comprises a membrane structure, and the membrane structure is stacked on the light guide plate; the diaphragm is structurally provided with a positioning gap, and the second insertion block is inserted into the positioning gap.

Furthermore, the second inserted block and the positioning notch are all provided with a plurality of openings, and the opening directions of the positioning notches are different.

Furthermore, a second bump is arranged on the outer side of the diaphragm structure, a groove is formed in the side wall of the back shell, and the second bump is directly positioned and installed in the groove or is pressed and fixed in the groove through the front frame.

Furthermore, a slot is formed in the inner side of the front frame, a soft rubber pad is filled in the slot, and the soft rubber pad is higher than the surface of the slot.

The beneficial effect that this application realized mainly has following several: the backlight module comprises a backlight module, a back shell, a front frame, a back shell, a light guide plate, a first insertion block, a second insertion hole, a first insertion hole, a second insertion block, a first insertion hole, a second insertion hole and a third insertion hole, wherein the first insertion block and the second insertion hole are respectively arranged on two sides of the light guide plate of the backlight module; and direct grafting through inserted block and jack comes the fixed mounting light guide plate, and it is more convenient relatively to bond the mode that soft cushion comes chucking light guide plate in the inboard of dorsal scale, and it is easier to operate, can improve backlight unit's packaging efficiency, realizes backlight unit's fast assembly.

Drawings

Fig. 1 is an exploded view of a backlight module according to one or two embodiments of the present disclosure;

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

FIG. 3 is a schematic top view of a light guide plate of a backlight module according to one or two embodiments of the present application;

fig. 4 is a schematic perspective view of a light guide plate of a backlight module according to one or two embodiments of the present application;

FIG. 5 is an enlarged view of the portion B in FIG. 4;

FIG. 6 is a schematic top view of a film structure of a backlight module according to one or two embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of a back shell of a backlight module according to one or two embodiments of the present application;

FIG. 8 is a schematic structural diagram of a front frame of a backlight module according to one or two embodiments of the present application;

FIG. 9 is an enlarged view of the portion C of FIG. 8;

fig. 10 is an enlarged schematic view of a portion D in fig. 8.

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 application will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 10, a backlight module with a light guide plate inserted therein can be assembled conveniently by structural improvement of the light guide plate, the back case 1 and the front frame 4, thereby improving the assembly efficiency of the backlight module. The backlight module comprises a back shell 1, a side-in light source 2, a light scattering component 3 and a front frame 4, wherein the back shell 1 is generally made of a metal stamping forming part and is provided with a bottom and a side wall; the lateral light source 2 can adopt an LED lamp bar made of a flexible FPCB plate; the light scattering component 3 is a light scattering structure and comprises a light guide plate, a brightness enhancement film, a light scattering film and the like; the front frame 4 may be formed in an injection-molded frame-like structure. The side income formula light source 2 is fixed on the medial surface of backshell 1, can bond fixedly through heat conduction double faced adhesive tape 21, heat conduction double faced adhesive tape 22, and the end that stretches out of side income formula light source 2 wears out the backshell 1 back from the perforation 14 that sets up on backshell 1, and the attached single-sided glue 23 protection in perforation 14 outside avoids the perforated tip of draped over one's shoulders scratch side income formula light source 2 to stretch out the end. The light scattering component 3 is arranged in the back shell 1, and light emitted by the side-in light source 2 can be irradiated to the light scattering component 3 from the side. Preceding frame 4 is fixed in dorsal scale 1 front side, can fix through buckle structure joint between preceding frame 4 and the dorsal scale 1.

Referring to fig. 3 to 5, the light scattering assembly 3 includes a light guide plate 31, a film structure 32 and a reflective film 33, wherein the film structure 32 is disposed on the light guide plate 31, and the reflective film 33 is disposed on the back of the light guide plate 31. A reflective sheet 315 is arranged outside the light guide plate, a first insertion block 311 and a second insertion block 312 are arranged on the light guide plate 31, the first insertion block 311 and the second insertion block 312 are oppositely arranged on two side surfaces of the light guide plate 31 and are both arranged outside the light guide plate 31; the first insertion block 311 and the second insertion block 312 may be integrally formed when the light guide plate is injection molded. The first insertion block 311 and the second insertion block 312 may be disposed outside four sides of the light guide plate 31, or may be disposed outside one, two, or three sides of the light guide plate 31; when the first insertion block 311 and the second insertion block 312 are provided only on the outer side of one side edge of the light guide plate 31, it is preferable to provide two or more first insertion blocks 311 and second insertion blocks 312 on the side edge; in the drawing of the present embodiment, the first insertion block 311 and the second insertion block 312 are disposed only on the outer side of one side edge of the light guide plate 31, and thus the first insertion block 311 and the second insertion block 312 are disposed at three positions, i.e., the left, the middle, and the right, of the light guide plate 31.

Referring to fig. 7, 8 and 10, the back shell 1 is provided with a first insertion hole 11, and the size and position of the first insertion hole 11 are matched with the first insertion block 311, so that the first insertion block 311 can be inserted into the first insertion hole 11. The front frame 4 is provided with a second insertion hole 41, and the size and the position of the second insertion hole 41 are matched with the second insertion block 312, so that the second insertion block 312 is inserted into the second insertion hole 41. When the backlight module is assembled, the light guide plate 31 can be inserted and fixed on the back shell 1 at one side through the matching of the first insertion block 311 and the first insertion hole 11, and can be inserted and fixed on the front frame 4 at the other side through the matching of the second insertion block 312 and the second insertion hole 41, so that the light guide plate can be positioned through the matching of the insertion blocks and the insertion holes when being installed, and the light guide plate can be stably fixed on the back shell and the front frame of the backlight module through the matching of the insertion blocks and the insertion holes; and direct grafting through inserted block and jack comes the fixed mounting light guide plate, and it is more convenient relatively to bond the mode that soft cushion comes chucking light guide plate in the inboard of dorsal scale, and it is easier to operate, can improve backlight unit's packaging efficiency, realizes backlight unit's fast assembly.

Referring to fig. 3 to 5, as a further preferred scheme, the size of the first insertion block 311 is preferably set to be larger than that of the second insertion block 312, so that the mechanical strength of the first insertion block 311 is better, and the first insertion block 311 is more stable when being inserted into the metal back shell 1, thereby preventing the high-strength metal back shell 1 from damaging the first insertion block 311; the second insert block 312 is generally matched with the front frame 4 made of plastic, so that the size of the second insert block can be set to be smaller, and the strength requirement of matching with the front frame 4 can be met. At least part of the side surfaces of the first insertion block 311 and the second insertion block 312 are arc surfaces, so that the contact area between the first insertion hole 11 of the back case 1 and the second insertion hole 41 of the front frame 4 can be increased, and the installation strength between the light guide plate 31 and the back case 1 and the front frame 4 can be increased. The first jack 11 is matched with the first insertion block 311, and the second jack 41 is matched with the second insertion block 312, that is, the size, shape and position of the first jack 11 and the second jack 41 are adapted to the size, shape and position of the first insertion block 311 and the second insertion block 312, and the first jack 11 and the second jack 41 are configured to be in a structure consistent with the size, shape and position of the first insertion block 311 and the second insertion block 312; considering that the coefficient of expansion with heat and contraction with cold is different between the metal material and the plastic part material, the first insertion hole 11 on the back shell 1 can be set slightly larger.

When the backlight module in this embodiment is assembled, the side-in light source 2 is fixed on the inner side wall of the back shell 1, and then the reflective film 33 is fixed in the back shell 1; then, the light guide plate 31 is installed in the back case 1, and the first insertion block 311 is inserted into the first insertion hole 11; then, installing a diaphragm structure 32 on the light guide plate 31; finally, the front frame 4 is fixed to the back case 1 while the second insert block 312 is inserted into the second insertion hole 41.

Example two

Referring to fig. 1 to 10, the backlight module in the embodiment is based on the first embodiment and is further improved on the basis of the first embodiment.

Referring to fig. 8 and 9, the backlight module of the present embodiment is provided with the side-in light source 2 on one long side, and the first insertion block 311 and the second insertion block 312 are disposed on one side of the light guide plate 31 close to the side-in light source 2. The concave arc-shaped elastic sheet 42 is arranged on one side, far away from the side-in light source 2, of the front frame 4, the arc-shaped elastic sheet 42 and the front frame 4 are integrally formed, when the light guide plate 31 is installed in the back shell 1, the arc-shaped elastic sheet 42 abuts against the outer side of the light guide plate 31, so that the light guide plate 31 is pressed in the back shell 1 through the arc-shaped elastic sheet 42, and the light guide plate 31 can be fixed in the back shell 1 on two opposite sides of the backlight module under the fixing action of the jacks and the insertion blocks, and the fixing effect is better; and arc-shaped elastic sheet 42 is an elastic structure, and is matched with the hard plug-in jack and the plug block structure to fix the light guide plate, so that the fixing effect can be further improved. The arc-shaped elastic pieces 42 are preferably provided in two or more pieces and are integrally formed when the front frame 4 is injection-molded.

Referring to fig. 7, the back shell 1 is preferably provided with an avoiding opening 13, the size and the position of the avoiding opening 13 are matched with the arc-shaped elastic sheet 42, and the arc-shaped elastic sheet 42 can be avoided through the avoiding opening 13 when the front frame 4 and the back shell 1 are installed, so that the arc-shaped elastic sheet 42 can be abutted against the light guide plate 31.

Referring to fig. 3, 4 and 9, as a further preferred scheme, an arc-shaped protrusion 313 is disposed on one side of the light guide plate 31, which is far away from the lateral light source 2, the arc-shaped protrusion 313 abuts against the arc-shaped elastic sheet 42, and the connection between the light guide plate 31 and the front frame 4 is tighter by the cooperation between the arc-shaped protrusion 313 and the arc-shaped elastic sheet 42. Preferably, a first protrusion 421 is further disposed on the inner side of the arc-shaped elastic piece 42, and the first protrusion 421 abuts against the arc-shaped protrusion 313. The first protrusions 421 may be provided in plural to increase the friction between the arc-shaped elastic sheet 42 and the arc-shaped protrusion 313 when the two are abutted, so as to enhance the connection stability of the two.

Referring to fig. 3 to 5, in order to ensure that a proper distance is maintained between the side-in light source 2 and the light guide plate 31, light emitted by the side-in light source is fully utilized, and a visual effect of light emission of the backlight module is ensured, the light guide plate 31 is further provided with a butting block 314, and the butting block 314 butts against an inner side wall of the side-in light source 2 and/or the back case 1, so that the distance between the side-in light source 2 and the light guide plate 31 can be ensured. Three abutting blocks 314 can be arranged, one of the left, the middle and the right of the light guide plate is arranged, two of the two sides abut against the inner side wall of the back shell 1, and the abutting block 314 at the middle position abuts against the side-in type light source 2 (specifically, the FPCB plate of the side-in type light source 2); it is also possible to abut all three abutment blocks 314 on the lateral entrance light source 2. The abutting blocks 314 may also be integrally formed with the main structure of the light guide plate during the injection molding of the light guide plate.

Referring to fig. 1, 2 and 6, the film structure 32 in this embodiment includes a light diffusing film 323, a lower light adding film 324 and an upper light adding film 325, and the light diffusing film 323, the lower light adding film 324 and the upper light adding film 325 are sequentially stacked on the light guide plate 31. In order to better fix each membrane structure, the light-diffusing film 323, the lower light-adding film 324 and the upper light-adding film 325 are all provided with a positioning notch 321, and the second inserting block 312 is inserted into the positioning notch 321, so that each membrane is clamped between the light guide plate 31 and the front frame 4, and simultaneously, each membrane can be further positioned and fixed through the cooperation of the second inserting block 312 and the positioning notch 321. The side surface of the second insert block 312 contacting the positioning notch 321 on the membrane is preferably configured as an arc-shaped structure, so as to prevent the sharp edge of the second insert block 312 from damaging the membrane.

Referring to fig. 6, a plurality of second insertion blocks 312 and positioning notches 321 are preferably disposed, and the opening directions of the positioning notches 321 are different, so that the membrane structure can be positioned from different directions, and the positioning and fixing effects are better. For example, in the drawing of the present embodiment, three positioning notches 321 are provided, an opening of the left positioning notch 321 is towards the left, an opening of the middle positioning opening 321 is towards the top, and an opening of the right positioning opening 321 is towards the right, so that after the membrane is installed in cooperation with the second insert block 312 through the positioning notches 321, the movement of the membrane in the up-down, left-right, and left-right directions is limited; and the diaphragm is convenient to mount by adopting an open positioning notch structure.

Referring to fig. 1, 2, 6 and 7, a second bump 322 is disposed on the outer side of the diaphragm structure 32, the second bump 322 is a portion protruding from the main structure of the diaphragm, a groove 12 is disposed on the side wall of the back shell 1, and the size and position of the groove 12 are the same as those of the second bump 322, so that the second bump 322 can be directly positioned and mounted in the groove 12, which facilitates the mounting of the diaphragm structure 32 on the back shell 1; the second protrusion 322 is preferably pressed into the groove 12 by the front frame 4 after being positioned and installed in the groove 12, so that the films can be further fixed on the backlight module. The second protrusions 322 and the grooves 12 are preferably provided in plural, three in this embodiment, and are disposed on the left and right sides of the backlight module.

Referring to fig. 1, 8 and 9, a plurality of slots 43 are formed in the inner side of the front frame 4, soft rubber pads 431 are filled in the slots 43, the soft rubber pads 431 are higher than the surfaces of the slots 43, when the front frame 4 fixes the membrane, the soft rubber pads 431 are in contact with the membrane, and the soft rubber pads 431 can fix the membrane better. The soft rubber pad 431 may be foam rubber.

Referring to fig. 1, a circle of foam rubber 5 is further arranged on the front surface of the front frame 4, and the foam rubber 5 facilitates installation of a liquid crystal panel during subsequent display assembly. The handle 6 is preferably arranged on the upper-layer bright enhancement film 325 of the uppermost-layer membrane structure, the handle 6 is attached to a protective film (not shown in the figure) of the upper-layer bright enhancement film 325, the protective film of the upper-layer bright enhancement film 325 can be easily torn off through the handle 6, and the protective film is conveniently torn off when the display is assembled.

Referring to fig. 1, in order to avoid light leakage of the backlight module and improve the visual effect of light emission of the backlight module, a light shielding adhesive 71 is attached to the outer side of the avoiding opening 13, a light shielding adhesive 72 is attached to the outer side of the groove 12, and a light shielding adhesive 73 is attached to the outer side of the first jack 11, so that the light shielding adhesive is attached to each possible light leakage position of the backlight module to shield the light leakage position, and light leakage of the backlight module is avoided.

It should be understood that the above examples of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. 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 application shall be included in the protection scope of the claims of the present application.

Claims (10)

1. The utility model provides a backlight unit of light guide plate grafting installation which characterized in that: the LED backlight module comprises a back shell (1), a side-in light source (2), a light scattering component (3) and a front frame (4), wherein the side-in light source (2) is fixed on the inner side surface of the back shell (1), the light scattering component (3) is arranged in the back shell (1), and the front frame (4) is fixed on the front side of the back shell (1); the light scattering component (3) comprises a light guide plate (31), wherein a first insertion block (311) and a second insertion block (312) are arranged on the light guide plate (31), the first insertion block (311) and the second insertion block (312) are oppositely arranged on two side faces of the light guide plate (31) and are arranged on the outer side of the light guide plate (31); the back shell (1) is provided with a first jack (11), the front frame (4) is provided with a second jack (41), the first plug block (311) is plugged in the first jack (11), and the second plug block (312) is plugged in the second jack (41).

2. The backlight module of claim 1, wherein: the size of the first insertion block (311) is larger than that of the second insertion block (312), and at least partial side surfaces of the first insertion block (311) and the second insertion block (312) are arc surfaces; the first jack (11) is matched with the first insertion block (311), and the second jack (41) is matched with the second insertion block (312).

3. A backlight module with a light guide plate inserted and mounted according to claim 1 or 2, wherein: the first insertion block (311) and the second insertion block (312) are arranged on one side, close to the side-in light source (2), of the light guide plate (31); the front frame (4) is provided with an inwards concave arc-shaped elastic sheet (42) at one side far away from the side-in light source (2), the arc-shaped elastic sheet (42) and the front frame (4) are integrally formed, and the arc-shaped elastic sheet (42) abuts against the outer side of the light guide plate (31).

4. A backlight module with a light guide plate inserted and mounted according to claim 3, wherein: the light guide plate (31) is provided with an arc-shaped protrusion (313) at one side far away from the lateral light source (2), and the arc-shaped protrusion (313) is abutted to the arc-shaped elastic sheet (42).

5. The light guide plate plug-in mounting backlight module according to claim 4, wherein: the inner side of the arc-shaped elastic sheet (42) is provided with a first bump (421), and the first bump (421) is abutted to the arc-shaped protrusion (313).

6. A backlight module with a light guide plate inserted and mounted according to claim 3, wherein: the light guide plate (31) is further provided with a butt joint block (314), and the butt joint block (314) is in butt joint with the inner side wall of the side-entering light source (2) and/or the back shell (1).

7. A backlight module with a light guide plate inserted and mounted according to any one of claims 1, 2 and 4-6, comprising: the light scattering component (3) further comprises a membrane structure (32), and the membrane structure (32) is overlapped on the light guide plate (31); the membrane structure (32) is provided with a positioning notch (321), and the second insertion block (312) is inserted into the positioning notch (321).

8. The light guide plate plug-in mounting backlight module according to claim 7, wherein: the second inserting block (312) and the positioning notches (321) are arranged in a plurality, and the opening directions of the positioning notches (321) are different.

9. The light guide plate plug-in mounting backlight module according to claim 7, wherein: the diaphragm structure (32) outside is provided with second lug (322), be provided with recess (12) on dorsal scale (1) lateral wall, second lug (322) direct location install in recess (12) or press through preceding frame (4) and firmly in recess (12).

10. The light guide plate plug-in mounting backlight module according to claim 7, wherein: the inner side of the front frame (4) is provided with a slot (43), the slot (43) is filled with a soft rubber pad (431), and the soft rubber pad (431) is higher than the surface of the slot (43).

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