CN215956717U - FPC structure, FPC beta structure and display screen backlight unit - Google Patents

Abstract

The utility model provides an FPC structure, an FPC folding structure and a display screen backlight module, wherein the FPC structure comprises a protruding part and a light pasting area, the width of the protruding part is larger than that of the light pasting area, one side of the light pasting area is flush with one side corresponding to the protruding part, a side edge convex block is further arranged at the position where the protruding part is connected with the light pasting area, and the side edge convex block is positioned on one side where the light pasting area is flush with the protruding part; an FPC folding structure is based on the FPC structure; a display screen backlight module comprises a lower iron frame, a light guide assembly, a rubber shell and the FPC folding structure. According to the utility model, the side lug boss on the FPC is attached to one side surface of the extending part, which is contacted with the FPC extending port, so that the phenomenon that the FPC is scratched by burrs on the lower iron frame extending port when the FPC passes through the FPC extending port on the lower iron frame after being bent can be prevented; so as to ensure the function of the FPC and avoid the failure risk of the FPC.

Description

FPC structure, FPC beta structure and display screen backlight unit

Technical Field

The utility model relates to the field of backlight modules, in particular to an FPC (flexible printed circuit) structure, an FPC folding structure and a display screen backlight module.

Background

The FPC is an important functional component of the backlight module to provide a light source, and therefore, in the design of the backlight module, the protection design of the FPC is particularly important; in the current technical means, one end of a strip-shaped FPC is a narrow and long light-attaching area, and the other end of the strip-shaped FPC is a wide and short extension part, in the current backlight module structure, the strip-shaped FPC passes through an FPC extension opening on a lower iron frame after the extension part 180 is folded diagonally and then bent for 90 degrees, and when the extension part passes through the FPC extension opening on the lower iron frame, the FPC is scratched by burrs on the lower iron frame extension opening, and the risk of FPC failure occurs.

SUMMERY OF THE UTILITY MODEL

The utility model provides an FPC structure, an FPC folding structure and a display screen backlight module, aiming at solving the problems that when a strip-shaped FPC extending part passes through an FPC extending port on a lower iron frame, the FPC is scratched by burrs on the lower iron frame extending port and the like, and the risk of FPC failure occurs.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a FPC structure, including the extension and with the subsides lamp district that the extension is connected, the width of extension is greater than paste the lamp district, paste one side in lamp district with one side parallel and level that the extension corresponds, the extension with paste lamp district hookup location department and still be equipped with the side lug, the side lug is located paste the lamp district with one side of extension parallel and level.

Preferably, the side bumps are of a square structure.

Further, the length of the side projection is equal to the width of the extension.

Still provide a FPC beta structure, form through specific mode is folding based on foretell FPC structure, the extension with the side lug is close to the angular bisector of contained angle between the extension side is in the structural reverse extension line of FPC is folding axle, the extension winds folding axle is past the back in subsides light district rotates 180 back with it is perpendicular in subsides light district, just the side lug overlaps in the back of extension, the side lug and the extension winds simultaneously on the side lug with a side of extension parallel and level is past the front in subsides light district rotates 90.

Further, the front side of the light pasting area is provided with an LED bonding pad, the back side of the light pasting area is provided with a covering film, the front side of the extending portion is provided with a reinforcing structure, and one end, far away from the light pasting area, of the back side of the extending portion is provided with a golden finger.

The backlight module comprises a lower iron frame, a light guide assembly, a rubber shell and the FPC folding structure, wherein the light guide assembly is fixed between the lower iron frame and the rubber shell, the back surface of a light pasting area on the FPC folding structure is pasted on the inner side of the lower iron frame through FPC fixing glue, a bending angle matched with the corner position of the lower iron frame is arranged on the light pasting area, and an LED light bar is arranged on the front surface of the light pasting area; the extension part penetrates through an FPC extension opening formed in the lower iron frame and then is attached to and contacted with the bottom surface of the lower iron frame.

Furthermore, the light guide assembly comprises a reflective film, a light guide plate and an optical film group which are sequentially stacked from the lower iron frame to the rubber shell, the reflective film is bonded on the lower iron frame through a fixing adhesive tape, a light guide plate positioning column is arranged on one side edge of the light guide plate close to the surface of the lower iron frame, the light guide plate positioning column is inserted in a through hole arranged at the corresponding position of the lower iron frame, a through groove is arranged at the position, opposite to the light guide plate positioning column, on the reflective film, a plurality of film positioning bosses are arranged on one side edge of the light guide plate far away from the surface of the lower iron frame, positioning clamping lugs matched with the film positioning bosses are arranged at the positions, opposite to the film positioning bosses, on the light guide assembly, and the light guide assembly is sleeved on the film positioning bosses through the positioning clamping lugs; the diaphragm positioning boss penetrates through the positioning clamp ear and then is clamped in the clearance groove which is arranged on the rubber shell and corresponds to the diaphragm positioning boss.

Furthermore, the optical diaphragm group comprises a light-diffusing film, a lower light-adding film and a DEFB which are sequentially stacked from the light guide plate to the glue shell, and the positions, right opposite to the diaphragm positioning bosses, of the light-diffusing film, the lower light-adding film and the DEFB are respectively provided with a positioning lug matched with the diaphragm positioning bosses.

Furthermore, a film pressing foam is arranged on one side edge of the DEFB close to the surface of the rubber shell, a first sinking groove is formed in the position of the rubber shell, which is right opposite to the film pressing foam, and the film pressing foam is bonded in the first sinking groove.

Further, be equipped with a plurality of convex hulls on the lateral wall of chase down, glue on the lateral wall of shell with the corresponding position of convex hull all be equipped with the knot hole that the convex hull matches, the convex hull joint is in detaining the hole, the side top of chase down still is equipped with a plurality of protruding structures, glue on the inner wall of shell with the position that the protruding structure corresponds still be equipped with the heavy groove of second that the protruding structure matches, protruding structure pegs graft in the heavy groove of second.

Compared with the prior art, the beneficial effects are:

after the FPC is assembled on the lower iron frame, the FPC is taken as an important functional part for providing a light source for the backlight module, and because the side lug boss on the FPC is attached to one side surface of the extending part contacted with the extending port of the FPC, the FPC can be prevented from being scratched by burrs on the extending port of the lower iron frame when the FPC passes through the extending port of the FPC on the lower iron frame after being bent; so as to ensure the function of the FPC and avoid the failure risk of the FPC.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is a schematic structural view of example 2.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view of example 3.

Fig. 5 is a schematic structural view of the side of the rubber case close to the lower iron frame in embodiment 3.

Fig. 6 is a schematic structural view of a lower chase in embodiment 3.

Detailed Description

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 positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

example 1

As shown in fig. 1, the FPC structure includes an extending portion 1 and a light-attaching region 2 connected to the extending portion 1, wherein the extending portion 1 has a width larger than that of the light-attaching region 2, one side of the light-attaching region 2 is flush with a side corresponding to the extending portion 1, a side bump 3 is further disposed at a connection position of the extending portion 1 and the light-attaching region 2, and the side bump 3 is located on one side of the light-attaching region 2 flush with the extending portion 1; the side lug 3 is of a square structure; the length of the side projections 3 is equal to the width of the extension 1.

FPC structure one end is extension 1, and the other end is for pasting the lamp district 2, and the width broad of extension 1, length are shorter, pastes that the width of lamp district 2 is narrower than extension 1, length is longer than extension 1, wholly is flexible structure, can fold or buckle. In the embodiment, the structure of the side bump 3 for preventing the FPC from being scratched is added at the outer side of the FPC bending area so as to prevent the FPC from being scratched by burrs on the extending port 11 of the lower iron frame 10 when the FPC passes through the FPC extending port 11 on the lower iron frame 10 after being bent; so as to ensure the function of the FPC and avoid the failure risk of the FPC.

Example 2

This embodiment provides a FPC beta structure, it forms through specific mode folding to be based on the FPC structure in embodiment 1, as shown in fig. 2 and fig. 3, the reverse extension line of the angular bisector of the contained angle between 1 one side of extension 1 and side lug 3 on FPC structure is folding axle 7, extension 1 is perpendicular with subsides light district 2 after rotating 180 towards the back of subsides light district 2 around folding axle 7, and side lug 3 overlaps on the back of extension 1, side lug 3 and extension 1 rotate 90 towards the front of subsides light district 2 around the side of 1 parallel and level of extension on the side lug 3 simultaneously.

Like a conventional FPC, before the FPC is folded, the side of the light-attaching region 2 where the LED pads are provided is a front side, the side of the cover film is a back side, the front side of the protruding portion 1 is provided with the reinforcing structure 4, and one end of the back side away from the light-attaching region 2 is provided with the gold finger 6.

In practical use, the FPC in embodiment 1 needs to be folded in a specific manner to be used in the backlight module, the most important folding of the position of the protruding portion 1 is performed, a reverse extension line of an angular bisector of an included angle between the protruding portion 1 and the side bump 3, which is close to one side of the protruding portion 1, on the FPC structure is defined as a folding axis 7, the protruding portion 1 needs to be rotated 180 degrees around the folding axis 7 toward the back of the light attaching region 2 and then perpendicular to the light attaching region 2, after folding, the protruding portion 1 and the light attaching region 2 are located on the same plane and perpendicular to each other, then the side bump 3 and the protruding portion 1 are rotated 90 degrees around the side of the side bump 3, which is flush with the protruding portion 1, toward the front of the light attaching region 2, and at this time, the protruding portion 1 and the light attaching region 2 are located on different planes. In actual use, the flexible lamp pasting region 2 is pasted on the lower iron frame 10, and a bending corner 8 is formed at the corresponding corner position of the lower iron frame 10. After the whole structure is folded, the structure can be more conveniently used in a backlight module. And when the extension part 1 is extended from the extension opening 11 of the lower iron frame 10, the side projections 3 first contact the burrs on the extension opening 11 of the lower iron frame 10. A bending indicator 5 is generally added to the bending region of the FPC for indicating the bending direction of the FPC, so as to facilitate correct operation and improve the operation efficiency.

Example 3

As shown in fig. 4, a display screen backlight module includes a lower bezel 10, a light guide assembly 20, a rubber casing 60, and an FPC folding structure 70 in embodiment 2, where the light guide assembly 20 is fixed between the lower bezel 10 and the rubber casing 60, the back of a light attachment region 2 on the FPC folding structure is attached to the inner side of the lower bezel 10 through an FPC fixing adhesive, a bending angle matched with the corner position of the lower bezel 10 is disposed on the light attachment region 2, and an LED light bar is mounted on the front of the light attachment region 2; the extension part 1 passes through an FPC extension opening 11 arranged on the lower iron frame 10 and then is attached and contacted on the bottom surface of the lower iron frame 10.

Referring to fig. 4 to 6, the light guide assembly 20 includes a reflective film 30, a light guide plate 40, and an optical film set 50 stacked in sequence from a lower bezel 10 to a glue case 60, the reflective film 30 is adhered to the lower bezel 10 by a fixing glue 31, and 2 double-sided tapes are disposed on two short sides of the reflective film 30 for adhering and fixing the light guide plate 40 and the reflective film 30 together to prevent the light guide plate 40 from jumping off in the z direction. A light guide plate positioning column (positioned on the back of the guide pipe plate and not shown in the figure) is arranged on one side edge of the light guide plate 40 close to the surface of the lower iron frame 10, the light guide plate positioning column is inserted into a through hole formed in the corresponding position of the lower iron frame 10, a through groove 32 is formed in the position, opposite to the light guide plate positioning column, of the reflection film 30, a plurality of membrane positioning bosses 41 are arranged on one side edge of the light guide plate 40 far away from the surface of the lower iron frame 10, positioning clamping lugs 54 matched with the membrane positioning bosses 41 are arranged in the positions, opposite to the membrane positioning bosses 41, of the light guide assembly 20, and the light guide assembly 20 is sleeved on the membrane positioning bosses 41 through the positioning clamping lugs 54; the membrane positioning boss 41 penetrates through the positioning clamp lug 54 and then is clamped in a clearance groove 61 which is arranged on the rubber shell 60 and corresponds to the membrane positioning boss 41; thus, 3 film positioning bosses 41 with different shapes are arranged on the light guide plate 40 for nesting the optical film group 50 in the x/y direction. In the present embodiment, the fixing method of the light guide plate 40 includes: the light guide plate positioning column is inserted into the through hole of the lower iron frame 10 and the light guide plate 40 fixing double-sided adhesive tape bonds the light guide plate 40 and the reflective film 30 together to form a whole, then is fixed in the lower iron frame 10 through the reflective film 30 fixing adhesive, and finally is pressed and fixed in the lower iron frame 10 through the adhesive case 60; the x/y/z direction of the light guide plate 40 is limited and fixed, and the phenomenon that the light guide plate 40 is loosened and jumped off in the transportation process, the work process and the three comprehensive experiments of the product is avoided; meanwhile, the limit fixation of the anti-loosening silica gel is omitted, and the risk of adverse phenomena such as film arching or film wrinkling of the product after three comprehensive experiments and reliability experiments due to the fact that the silica gel is loosened and displaced to enter 50 parts of the diaphragm group caused by vibration can be avoided.

The optical diaphragm group 50 comprises a light-diffusing film 51, a lower light-adding film 52 and DEFB53 which are sequentially stacked from the light guide plate 40 to the rubber shell 60, and positioning lugs 54 matched with the diaphragm positioning bosses 41 are respectively arranged at the positions, which are opposite to the diaphragm positioning bosses 41, on the light-diffusing film 51, the lower light-adding film 52 and the DEFB 53; the side edge of the DEFB53 close to the plate surface of the rubber casing 60 is provided with film-pressing foam 55, the position of the rubber casing 60 opposite to the film-pressing foam 55 is provided with a first sinking groove 62, and the film-pressing foam 55 is bonded in the first sinking groove 62. Thus, the light diffusing film 51, the lower light intensifying film 52 and the DEFB53 in the optical film set 50 are inserted into the positioning boss 41+ the film pressing foam 55 for pressing through the positioning lug 54; to limit the x/y/z direction of the 3 diaphragms.

Be equipped with a plurality of convex closure 12 on the lateral wall of lower chase 10, all be equipped with the knot hole 63 that matches with convex closure 12 with the corresponding position of convex closure 12 on the lateral wall of gluey shell 60, convex closure 12 joint is in detaining the hole 63, and the side top of lower chase 10 still is equipped with a plurality of protruding structures 13, and the position that corresponds with protruding structure 13 on the inner wall of gluey shell 60 still is equipped with the heavy groove 64 of second that matches with protruding structure 13, and protruding structure 13 is pegged graft in the heavy groove 64 of second. The rubber shell 60 is provided with a buckling hole 63 buckled on the convex hull 12 of the lower iron frame 10, and the limiting fixation in the z direction and the limiting fixation in the x/y direction of the convex block of the lower iron frame 10 are carried out by inserting the convex block of the lower iron frame into the second sinking groove 64, so that the rubber shell 60 is prevented from being pulled out when the rubber shell 60 is buckled on the lower iron frame 10; meanwhile, the rubber shell 60 can be prevented from shaking and abnormal sound in work and three comprehensive experiments.

In this embodiment, the backlight module of the FPC folding structure with the special protection function in embodiment 2 is adopted, after the FPC is assembled on the lower iron frame 10, the FPC serves as an important functional component for providing a light source for the backlight module, and since the FPC has a side boss attached to a side surface of the protruding portion 1 contacting with the FPC protruding opening 11, it is possible to prevent the FPC from being scratched by burrs on the protruding opening 11 of the lower iron frame 10 when the FPC passes through the FPC protruding opening 11 on the lower iron frame 10 after being bent; so as to ensure the function of the FPC and avoid the failure risk of the FPC. And adopt firm mounting means between iron frame 10, membrane 51, light guide plate 40, optical module and the gluey shell 60 down in the backlight unit, can avoid the product to appear rocking the abnormal sound with gluey shell 60 in three comprehensive experiments in the work.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a FPC structure, including extension (2) and with paster lamp district (1) that extension (2) are connected, the width of extension (2) is greater than paster lamp district (1), one side of paster lamp district (1) with one side parallel and level that extension (2) correspond, its characterized in that, extension (2) with paster lamp district (1) hookup location department still is equipped with side lug (3), side lug (3) are located paster lamp district (1) with one side of extension (2) parallel and level.

2. FPC structure according to claim 1, characterised in that the side bumps (3) are of square configuration.

3. FPC structure according to claim 1 or 2, characterised in that the length of the side bumps (3) is equal to the width of the protrusions (2).

4. An FPC folded structure, the FPC structure of any claim 1 to 3, characterized in that, the extension line of the protrusion (2) and the side lug (3) on the FPC structure that is close to the angle bisector of the included angle between one side of the protrusion (2) is a folding axis (7), the protrusion (2) winds the folding axis (7) and is perpendicular to the light-attaching region (1) after rotating 180 degrees toward the back of the light-attaching region (1), and the side lug (3) is overlapped on the back of the protrusion (2), the side lug (3) and the protrusion (2) simultaneously wind a side on the side lug (3) that is flush with the protrusion (2) toward the front of the light-attaching region (1) by 90 degrees.

5. The FPC folding structure of claim 4, wherein the light-attaching region (1) is provided with LED pads on the front surface and a cover film on the back surface, the protruding portion (2) is provided with a reinforcing structure (4) on the front surface and a gold finger (6) on the end of the back surface far away from the light-attaching region (1).

6. A display screen backlight module is characterized by comprising a lower iron frame (10), a light guide assembly (20), a rubber shell (60) and the FPC folding structure (70) of claim 4, wherein the light guide assembly (20) is fixed between the lower iron frame (10) and the rubber shell (60), the back of a light pasting region (1) on the FPC folding structure is pasted on the inner side of the lower iron frame (10) through FPC fixing glue, a bending angle matched with the corner position of the lower iron frame (10) is arranged on the light pasting region (1), and an LED light bar is installed on the front of the light pasting region (1); the extension part (2) penetrates through an FPC extension opening (11) formed in the lower iron frame (10) and then is attached to and contacted with the bottom surface of the lower iron frame (10).

7. The display screen backlight module according to claim 6, wherein the light guide assembly (20) comprises a reflective film (30), a light guide plate (40) and an optical film set (50) sequentially stacked from the lower iron frame (10) to the rubber case (60), the reflective film (30) is bonded to the lower iron frame (10) through a fixing adhesive tape (31), a light guide plate positioning column is arranged on one side of the light guide plate (40) close to the surface of the lower iron frame (10), the light guide plate positioning column is inserted into a through hole arranged at a corresponding position of the lower iron frame (10), a through groove (32) is arranged at a position on the reflective film (30) just opposite to the light guide plate positioning column, a plurality of film positioning bosses (41) are arranged on one side of the light guide plate (40) far away from the surface of the lower iron frame (10), and positions on the light guide assembly (20) just opposite to the film positioning bosses are arranged with the film positioning bosses (41) The light guide assembly (20) is sleeved on the diaphragm positioning boss (41) through the positioning clamping lug (54); the membrane positioning boss (41) penetrates through the positioning clamping lug (54) and then is clamped in a clearance groove (61) which is arranged on the rubber shell (60) and corresponds to the membrane positioning boss (41).

8. The display screen backlight module according to claim 7, wherein the optical film set (50) comprises a light-diffusing film (51), a lower light-adding film (52) and a DEFB (53) which are sequentially stacked from the light guide plate (40) to the rubber case (60), and positioning lugs (54) matched with the film positioning bosses (41) are respectively arranged on the light-diffusing film (51), the lower light-adding film (52) and the DEFB (53) at positions facing the film positioning bosses (41).

9. The backlight module of claim 8, wherein a squeeze film foam (55) is disposed on a side of the DEFB near the surface of the plastic case (60), a first sinking groove (62) is disposed at a position of the plastic case (60) opposite to the squeeze film foam (55), and the squeeze film foam (55) is bonded in the first sinking groove (62).

10. The display screen backlight module according to claim 8, wherein a plurality of convex hulls (12) are disposed on an outer side wall of the lower bezel (10), buckling holes (63) matched with the convex hulls (12) are disposed at positions on a side wall of the rubber casing (60) corresponding to the convex hulls (12), the convex hulls (12) are clamped in the buckling holes (63), a plurality of protruding structures (13) are further disposed at top portions of side edges of the lower bezel (10), second sinking grooves (64) matched with the protruding structures (13) are further disposed at positions on an inner wall of the rubber casing (60) corresponding to the protruding structures (13), and the protruding structures (13) are inserted in the second sinking grooves (64).

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