CN213814206U - Narrow frame backlight unit and mobile terminal - Google Patents
Narrow frame backlight unit and mobile terminal Download PDFInfo
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- CN213814206U CN213814206U CN202023310241.6U CN202023310241U CN213814206U CN 213814206 U CN213814206 U CN 213814206U CN 202023310241 U CN202023310241 U CN 202023310241U CN 213814206 U CN213814206 U CN 213814206U
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Abstract
The utility model discloses a narrow frame backlight unit and mobile terminal, backlight unit includes: the iron frame comprises a bottom plate and a side plate arranged on the bottom plate; the rubber frame is arranged around the top edge and the two side edges of the side plate, and one end of the rubber frame, which is positioned at the bottom edge of the side plate, is in an opening shape; the LED lamp is welded on the back of the FPC, faces the bottom plate and is fixed at the bottom end of the bottom plate through the LED double faced adhesive tape, and the FPC is back to the bottom plate and is adhered to the iron frame through the shading adhesive arranged on the front of the FPC; the reflecting sheet is attached to the bottom plate; the light guide plate is attached to the reflecting sheet, and the FPC and the light guide plate are partially overlapped and are adhered through FPC double faced adhesive tape along the direction from the top end to the bottom end of the bottom plate; the edge covering glue is bonded on the front side of the bottom end of the shading glue and extends to the back side of the bottom plate. In the utility model, the lower frame is narrower than the front group of backlight module; compared with a reverse backlight module, the double-sided adhesive tape is less used, the bottom plate can not sink or fold, the process is simpler, and the cost is lower.
Description
Technical Field
The utility model relates to a liquid crystal display technology field especially relates to a narrow frame backlight unit and mobile terminal.
Background
The mobile terminal using the LCD display shows the trend that the frame is narrower and narrower, and correspondingly, the frame of the backlight module providing the light source for the LCD display is narrower, so that the narrow frame requirement of the mobile terminal is met. At present, there are two types of backlight modules, i.e., a front backlight module and a back backlight module, according to different assembling modes. Compared with the front backlight module, the lower frame of the back backlight module can save a glue frame, so that the back backlight module can provide a lower frame which is narrower than the front backlight module. However, the cost of the backlight module is much higher than that of the backlight module of the front set due to the complicated structural design, expensive material and low product yield of the backlight module of the back set.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a narrow frame backlight unit for among the solution prior art, the narrow but problem with high costs of frame of reverse group backlight unit.
In order to solve the above problem, the utility model adopts the following technical scheme:
provided is a narrow-bezel backlight module, including:
the iron frame comprises a bottom plate and a side plate arranged on the bottom plate;
the rubber frame is arranged on the top edge and the two side edges of the side plate in a surrounding mode, and one end, located at the bottom edge of the side plate, of the rubber frame is in an opening shape;
the LED lamp is welded on the back of the FPC, the LED lamp faces the bottom plate and is fixed at the bottom end of the bottom plate through an LED double-faced adhesive tape, and the FPC is back to the bottom plate and is adhered to the iron frame through a shading adhesive arranged on the front of the FPC;
the reflecting sheet is attached to the bottom plate;
the light guide plate is attached to the front face of the reflection sheet, and the FPC and the light guide plate are partially overlapped and bonded through FPC double-sided adhesive tape along the direction from the top end to the bottom end of the bottom plate;
and the edge covering glue is bonded on the front side of the bottom end of the shading glue and extends to the back side of the bottom plate.
Optionally, the narrow-bezel backlight module further includes a reflection sheet attached to the bottom plate and a light guide plate attached to the front surface of the reflection sheet, wherein, along a direction from the top end to the bottom end of the bottom plate, the FPC and the light guide plate are partially overlapped and are bonded by an FPC double-sided adhesive tape.
Optionally, the bottom end of the light guide plate is of a wedge-shaped structure, and the FPC double-sided adhesive is adhered to the wedge-shaped structure.
Optionally, the narrow-frame backlight module further includes a diffusion sheet attached to the front surface of the light guide plate, a lower brightness enhancement sheet attached to the front surface of the diffusion sheet, an upper brightness enhancement sheet attached to the front surface of the lower brightness enhancement sheet, and a diffusion black strip attached to the front surface of the diffusion sheet and located between the lower brightness enhancement sheet and the FPC, wherein two sides of the bottom end of the lower brightness enhancement sheet are provided with extending terminals, and two sides of the FPC double-sided adhesive are provided with lug positions for bonding the extending terminals.
Optionally, a groove is formed in the inner side of the rubber frame, and the diffusion sheet, the lower light intensifying sheet and the upper light intensifying sheet extend into the groove.
Optionally, the rubber frame is provided with a convex edge protruding outwards, and the convex edge is lapped on the side plate.
Optionally, the rubber frame is injection-molded on the iron frame.
Optionally, the free end of the rubber frame extends to the corner position of the side edge.
Optionally, the front surface and the back surface of the bottom plate are both planar.
A mobile terminal is also provided, which comprises the narrow-frame backlight module.
The utility model discloses a technical scheme can reach following beneficial effect:
compared with the existing positive backlight module, the lower frame of the backlight module is narrower than that of the positive backlight module because the bottom end of the iron frame is not provided with the rubber frame; compare in current anti-backlight unit of group, the chase does not sink and hem, and the bottom of reflector plate is fixed without the double faced adhesive tape, and the width of FPC's width, the width of LED lamp plate, the width of diffusion black strip and the length of light guide plate wedge mechanism are all less moreover, therefore this backlight unit uses a double faced adhesive tape less, and technology is simpler, and the cost is lower, and the lower frame is narrower.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof of the present invention explain the present invention and do not form an improper limitation to the present invention. In the drawings:
fig. 1 is a schematic front structural view of a backlight module according to an embodiment of the present invention;
fig. 2 is a side sectional view of a backlight module according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is an exploded schematic view of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a local explosion of a backlight module according to an embodiment of the present invention;
fig. 6 is an exploded schematic view of an iron frame and a rubber frame disclosed in an embodiment of the present invention;
fig. 7 is a partial enlarged view of the rubber frame disclosed in the embodiment of the present invention;
fig. 8 is a partially enlarged view of a light guide plate according to an embodiment of the present invention;
fig. 9 is a partial enlarged view of the shading glue according to the embodiment of the present invention.
Wherein the following reference numerals are specifically included in figures 1-9:
an iron frame-1; a rubber frame-2; an LED lamp-3; LED double faced adhesive tape-4; a reflector sheet-5; a light guide plate-6; FPC-7; FPC double faced adhesive tape-8; a diffusion sheet-9; a lower brightness enhancement film-10; an upper brightness enhancement film-11; diffusion black stripe-12; shading glue-13; edge covering glue-14; a bottom plate-101; a side plate-102; pulling glue holes-103; a convex column-201; convex edge-202; a groove-203; wedge-shaped structure-601; ear position-801; a reach terminal-1001; opening-1301.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-5, the narrow-frame backlight module of the present invention includes an iron frame 1, a rubber frame 2, an LED lamp 3, an LED double-sided tape 4, a reflective sheet 5, a light guide plate 6, a FPC7, a FPC double-sided tape 8, a diffusion sheet 9, a lower brightness enhancement sheet 10, an upper brightness enhancement sheet 11, a diffusion black stripe 12, a light-shielding adhesive 13, and a binder 14. The iron frame 1 includes a bottom plate 101 and a side plate 102 fixed to the bottom plate 101 and surrounding the bottom plate 101. As shown in fig. 6, the rubber frame 2 has three side edges, the three side edges are respectively defined at the top edge and the two side edges of the side plate 102, the rubber frame is open at one end of the bottom edge of the side plate 102, that is, the rubber frame is wrapped at the top edge and the two side edges of the side plate 102, and the bottom edge of the side plate 102 is exposed without the rubber frame 2. The LED lamp 3 can be formed by a plurality of LED lamp beads welded on the back of the FPC7, the LED lamp 3 faces the bottom plate 101 and is adhered with the LED double-sided adhesive tape 4, and the LED lamp 3 is fixed at the bottom end of the bottom plate 101 through the LED double-sided adhesive tape 4. The FPC7 faces away from the chassis 101 and is bonded to the bezel 1 by a light-shielding adhesive 13 provided on the front surface thereof. A layer of edge-covering glue 14 is adhered to the bottom end of the light-shielding glue 13, and the edge-covering glue 14 is adhered to the bottom plate 101 after being bent. The edge covering adhesive 14 may be a double-sided adhesive or a single-sided adhesive. The edge covering glue 14 is provided with an avoiding opening avoiding the FPC7, so that the interference between the edge covering glue 14 and the FPC7 is avoided. Compared with the conventional positive backlight module, the lower frame of the backlight module is narrower than that of the positive backlight module because the bottom end of the iron frame 1 is not provided with the rubber frame; compared with the existing reverse-assembly backlight module, the front surface and the back surface of the bottom plate 101 can be planar, namely the iron frame 1 does not sink and fold, the process is simpler, and the cost is lower.
The rubber frame 2 can be injection molded on the iron frame 1. As shown in fig. 6, a glue pulling hole 103 is formed at a connection portion of the bottom plate 101 and the side plate 102, the glue frame 2 is injection-molded on the iron frame 1 through the glue pulling hole 103, and a convex column 201 located in the glue pulling hole 103 is formed on the glue frame 2. The free end of the rubber frame 2 extends to the corner position of the side edge 102. And as shown in fig. 7, the outer side of the front face of the rubber frame 2 is provided with a convex edge 202 protruding outwards, and the convex edge 202 is lapped on the side plate 102. So set up, simple structure, the processing of being convenient for guarantees gluey frame 2 and chase 1's firm in connection through drawing gluey hole 103 and projection 201 and overlap joint protruding edge 202 on curb plate 102.
The reflective sheet 5 is attached to the chassis 101, and the light guide plate 6 is attached to the front surface of the reflective sheet 5. As shown in fig. 8, the bottom end of the light guide plate 6 is provided with a wedge structure 601, and other portions of the light guide plate 6 are in a flat plate shape having the same thickness, and the wedge structure 601 of the light guide sheet 6 overlaps with the FPC7 along the top-to-bottom direction of the bottom plate 101. The top end of the back of the FPC7 is provided with an FPC double-sided adhesive tape 8, and the FPC7 is bonded with the wedge-shaped structure 601 of the light guide plate 6 through the FPC double-sided adhesive tape 8. By the arrangement, the coupling area of the light guide plate 6 and the LED lamp 3 can be increased, the critical angle of total reflection of light emitted by the LED lamp beads at the bottom end of the iron frame 1 on the upper surface of the light guide plate 6 is increased, and light emitted by the LED lamp 3 enters the light guide plate 6 in a larger proportion, so that the bottom end of the iron frame 1 has a better visual effect than that of a reverse-group backlight module, and the width of a lower frame of the backlight module can be further reduced; the bottom plate 101 is planar, so that the bottom end of the reflector plate 5 is not fixed by a double-sided adhesive tape, and compared with a reverse-assembled backlight module, the backlight module uses one less double-sided adhesive tape, and the cost is lower.
The diffusion sheet 9 is attached to the front surface of the light guide plate 6, the lower light intensifying sheet 10 is overlapped on the front surface of the diffusion sheet 9, the upper light intensifying sheet 11 is overlapped on the front surface of the lower light intensifying sheet 10, and the diffusion black stripe 12 is fixed on the front surface of the diffusion sheet 9 and is positioned in a gap between the FPC7 and the lower light intensifying sheet 10. The periphery of the upper brightness enhancement film 9 is adhered to the shading glue 13, and the shading glue 13 is adhered to the glue frame 2. The top and both sides limit of shading glue 13 can all set up opening 1301 according to the demand, and the bottom of shading glue 13 does not set up opening 1301, reduces FPC7 department light leak risk. As shown in fig. 5, the two sides of the bottom end of the lower gloss enhancement sheet 10 are provided with extending terminals 1001, and the two sides of the FPC double-sided tape 8 are provided with lugs 801 for adhering the extending terminals 1001, so as to improve the fixing firmness of the lower gloss enhancement sheet 10.
Furthermore, the inner side of the rubber frame 2 is provided with a groove 203, and the diffusion sheet 9, the lower brightness enhancement sheet 10 and the upper brightness enhancement sheet 11 extend into the groove 203, so that the widths of the diffusion sheet 9, the lower brightness enhancement sheet 10 and the upper brightness enhancement sheet 11 are slightly larger than those of the light guide plate 6, so as to shield a part of light emitted from the edge of the long side of the light guide plate 6, thereby preventing the bright line of the long side.
The utility model discloses a mobile terminal includes foretell backlight unit. Compared with the existing positive backlight module, the lower frame of the mobile terminal is narrower than that of the positive backlight module because the bottom end of the iron frame 1 is not provided with the rubber frame; compare in current anti-backlight unit of group, chase 1 does not sink and hem, the bottom of reflector plate 5 is not fixed with the double faced adhesive tape, and FPC 7's width (along bottom plate 101 top to bottom direction's size), the width of LED lamp 3 (along bottom plate 101 top to bottom direction's size), the width of diffusion black strip 12 (along bottom plate 101 top to bottom direction's size) and the length of 6 wedge structure 601 of light guide plate (along bottom plate 101 top to bottom direction's size) all can set up less, consequently this mobile terminal uses a double faced adhesive tape less, the technology is simpler, and the cost is lower, the lower frame is narrower.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (9)
1. The utility model provides a narrow frame backlight unit which characterized in that includes:
the iron frame comprises a bottom plate and a side plate arranged on the bottom plate;
the rubber frame is arranged on the top edge and the two side edges of the side plate in a surrounding mode, and one end, located at the bottom edge of the side plate, of the rubber frame is in an opening shape;
the LED lamp is welded on the back of the FPC, the LED lamp faces the bottom plate and is fixed at the bottom end of the bottom plate through an LED double-faced adhesive tape, and the FPC is back to the bottom plate and is adhered to the iron frame through a shading adhesive arranged on the front of the FPC;
the reflecting sheet is attached to the bottom plate;
the light guide plate is attached to the front face of the reflection sheet, and the FPC and the light guide plate are partially overlapped and bonded through FPC double-sided adhesive tape along the direction from the top end to the bottom end of the bottom plate;
and the edge covering glue is bonded on the front side of the bottom end of the shading glue and extends to the back side of the bottom plate.
2. The narrow-bezel backlight module of claim 1, wherein the bottom end of the light guide plate is a wedge-shaped structure, and the FPC double-sided adhesive is adhered to the wedge-shaped structure.
3. The narrow-border backlight module of claim 2, further comprising a diffusion sheet attached to the front surface of the light guide plate, a lower brightness enhancement sheet attached to the front surface of the diffusion sheet, an upper brightness enhancement sheet attached to the front surface of the lower brightness enhancement sheet, and a diffusion black stripe attached to the front surface of the diffusion sheet and located between the lower brightness enhancement sheet and the FPC, wherein two sides of the bottom end of the lower brightness enhancement sheet are provided with extending terminals, and two sides of the FPC double-sided tape are provided with lugs for bonding the extending terminals.
4. The narrow-bezel backlight module as claimed in claim 3, wherein a groove is formed on an inner side of the plastic frame, and the diffusion sheet, the lower brightness enhancement sheet and the upper brightness enhancement sheet extend into the groove.
5. The narrow-bezel backlight module as claimed in claim 4, wherein the adhesive frame has a protruding edge protruding outwards, and the protruding edge is overlapped with the side plate.
6. The narrow-bezel backlight module of claim 5, wherein the rubber frame is injection-molded on the iron frame.
7. The narrow-bezel backlight module of claim 5, wherein a free end of the adhesive frame extends to a corner position of the side edge.
8. The narrow bezel backlight module of any of claims 1-7, wherein the front and back sides of the chassis are planar.
9. A mobile terminal, characterized by comprising the narrow-bezel backlight module of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023310241.6U CN213814206U (en) | 2020-12-31 | 2020-12-31 | Narrow frame backlight unit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023310241.6U CN213814206U (en) | 2020-12-31 | 2020-12-31 | Narrow frame backlight unit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213814206U true CN213814206U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023310241.6U Active CN213814206U (en) | 2020-12-31 | 2020-12-31 | Narrow frame backlight unit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213814206U (en) |
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2020
- 2020-12-31 CN CN202023310241.6U patent/CN213814206U/en active Active
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