CN216437252U

CN216437252U - Backlight LB fixing glue structure and narrow-edge high-brightness backlight

Info

Publication number: CN216437252U
Application number: CN202121935198.4U
Authority: CN
Inventors: 张春; 焦江华; 陈建; 万中华
Original assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Current assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-05-03
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses a backlight LB fixed glue structure and a narrow-edge high-brightness backlight; the backlight LB fixed glue structure comprises a substrate layer, a first bonding layer and a second bonding layer, wherein the first bonding layer and the second bonding layer are respectively positioned on two sides of the substrate layer; the narrow-edge high-brightness backlight source comprises an FPC board and a light guide plate, a backlight source LB fixing glue structure is arranged between the FPC board and the light guide plate, the first bonding layer is bonded with the FPC board, and the second bonding layer is bonded with the light guide plate. The backlight LB fixing glue structure and the narrow-edge high-brightness backlight have the advantages of no light leakage, no light condensation, high reflection and the like, the width of a light mixing area and a frame of the backlight can be effectively reduced, and the use experience and market competitiveness of a product are improved.

Description

Backlight LB fixing glue structure and narrow-edge high-brightness backlight

Technical Field

The utility model relates to the field of LED backlight sources, in particular to a backlight source LB fixing glue structure and a narrow-edge high-brightness backlight source.

Background

Along with the requirement of the mobile phone terminal on the screen ratio is more and more extreme, the frame of the mobile phone is narrower and narrower, and the frame of the corresponding backlight module is narrower and narrower. The backlight module is provided with four frames, namely a left frame, a right frame, an upper frame and a lower frame, wherein the lower frame is generally a light incidence side, and the width of the frame is widest due to the fact that the light incidence side is integrated with an LED component and a related structure. In order to achieve a very narrow frame on the light source side, each backlight factory compresses the space from all sides, and how to make the light mixing region narrower is a direction of continuous research of the backlight factory.

The conventional LB fixing adhesive is a double-sided adhesive (LB refers to a semi-finished product after the LED and the FPC are welded, also called a light bar), and is used to fix the LB on the light guide plate, one side of the LB is adhered to the FPC, and the other side of the LB is adhered to the light guide plate, and the double-sided adhesive is formed by coating a transparent adhesive on the upper surface of a black-black, black-white, or white substrate. Transparent glue can have the influence of light leak, spotlight and extinction when LED light passes through, easily causes the light spot before the lamp, needs sufficient mixed light region like this to hide the flaw, is unfavorable for dwindling mixed light region.

In view of the above, the present invention provides a new technical solution to solve the existing technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a backlight LB fixing glue structure and a narrow-edge high-brightness backlight, which solve the technical defects that the width of a light mixing area and a frame of the prior backlight is overlarge, a narrowing space exists, and light is easy to lose.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a backlight LB fixed glue structure, includes the substrate layer and is located first adhesive linkage, the second adhesive linkage of substrate layer both sides respectively, first adhesive linkage is transparent or non-transparent glue layer, the second adhesive linkage is white opaque glue layer, first adhesive linkage is used for bonding with the FPC board of backlight, the second adhesive linkage is used for bonding with the light guide plate of backlight.

As an improvement of the technical scheme, an unlimited color ink layer is arranged between the first bonding layer and the base material layer.

As a further improvement of the above technical solution, a white or colorless ink layer is disposed between the second adhesive layer and the substrate layer.

As a further improvement of the technical scheme, the substrate layer is a PET substrate layer.

The utility model also provides a narrow-edge high-brightness backlight source which comprises an FPC board and a light guide plate, wherein the backlight source LB fixing glue structure is arranged between the FPC board and the light guide plate, the first bonding layer is bonded with the FPC board, and the second bonding layer is bonded with the light guide plate.

As an improvement of the technical scheme, the backlight LB fixing glue structure and the side part of the light guide plate are provided with LED devices, and the LED devices are connected with the FPC board in a welding mode and jointly form an LB device.

As a further improvement of the above technical solution, the light guide plate further comprises a light shielding film and a reflective film, wherein the light shielding film is located at the top of the FPC board, and the reflective film is located at the bottom of the LED device and the light guide plate.

As a further improvement of the above technical solution, a diffusion film and a brightness enhancement film are further disposed between the light guide plate and the light shielding film, the diffusion film is located on the top of the light guide plate, and the brightness enhancement film is located between the diffusion film and the light shielding film.

As a further improvement of the technical scheme, the device also comprises a bracket.

As a further improvement of the technical scheme, the bracket is an integrated rubber-iron bracket.

The utility model has the beneficial effects that: the utility model provides a backlight LB fixed glue structure and a narrow-edge high-brightness backlight, wherein the backlight LB fixed glue structure and the narrow-edge high-brightness backlight are used for bonding a light guide plate by white opaque glue, have the advantages of no light leakage, no light condensation and high reflection, can effectively reduce a light mixing area, narrow a backlight frame, reduce light loss, improve the brightness of the backlight, improve the use experience and also improve the market competitiveness of products and the production benefit of enterprises.

In conclusion, the backlight LB fixing glue structure and the narrow-edge high-brightness backlight solve the technical defects that the width of a light mixing area and a frame of the conventional backlight is too large, a narrowing space exists, and light is easy to lose.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the optical path of a backlight source using a conventional LB fixing glue in the prior art;

FIG. 2 is a schematic structural diagram of a backlight LB fixing glue structure according to the present invention;

FIG. 3 is a schematic diagram of an optical path of a backlight LB fixing glue structure in the application of the utility model;

FIG. 4 is a schematic structural diagram of a narrow-sided high-brightness backlight of the present invention;

FIG. 5 is a schematic view of another embodiment of a narrow-sided high-brightness backlight of the present invention;

FIG. 6 is a partial enlarged view of M in FIG. 5;

fig. 7 is another partial enlarged view of M in fig. 5.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The technical features of the utility model can be combined interactively without conflicting with each other, see fig. 1-7.

In the prior art, referring to fig. 1, light emitted from an LED enters a transparent glue layer, a part of the light passes through the transparent glue layer to cause light leakage, and a part of the light enters the glue layer and is reflected back to a light guide plate; the glue layer can absorb a part of light energy, and certain light energy loss can be caused; the glue layer can form tiny bubbles through extrusion, and light touches the bubbles and can form small bright spots one by one, and a plurality of light spots are formed through combination.

Therefore, the transparent glue easily causes light leakage and light spot formation, needs to cover a wider shading film to cover the light leakage and light spot formation, increases a light mixing area, enables a picture in a visible area to be uniform, is not beneficial to realizing a narrow frame, and can cause light loss.

Aiming at the technical defects in the prior art, the technical scheme adopted by the utility model for solving the technical problems is as follows:

specifically referring to fig. 2 and 3, the backlight LB fixing adhesive structure includes a substrate layer 11, and a first adhesive layer 12 and a second adhesive layer 13 respectively located on two sides of the substrate layer 11, where the first adhesive layer 12 is a transparent or non-transparent adhesive layer, the second adhesive layer 13 is a white opaque adhesive layer, the first adhesive layer 12 is used for adhering to the FPC board 2 of the backlight, and the second adhesive layer 13 is used for adhering to the light guide plate 3 of the backlight.

In this technical scheme, substrate layer 11 is the PET substrate layer, adopt opaque white glue as second adhesive linkage 13, be used for bonding light guide plate 3, the unable glue layer (second adhesive linkage 13) that gets into of light that the LED device 4 during operation takes place, because white surface reflectivity is high, light is through the whole light guide plate 3 that reflects back in glue layer white surface, light utilization ratio has been promoted, no light leak produces, because do not have the reunion of light in glue, can not cause the facula because of glue, and then can the width of photomask 5, reduce the region of mixing light, be favorable to realizing narrower frame, realize extremely narrow frame, promote the market competition who uses experience and product.

In one embodiment, an indefinite color ink layer 14 is disposed between the first bonding layer 12 and the substrate layer 11.

In another embodiment, a white or colorless ink layer 15 is disposed between the second adhesive layer 13 and the substrate layer 11.

With specific reference to fig. 4-7, based on the above-mentioned backlight LB fixing glue structure 1, the present invention further provides a narrow-edge high-brightness backlight, which includes an FPC board 2 and a light guide plate 3, wherein the backlight LB fixing glue structure 1 is disposed between the FPC board 2 and the light guide plate 3, the first adhesive layer 12 is adhered to the FPC board 2, and the second adhesive layer 13 is adhered to the light guide plate 3.

The LED devices 4 are arranged on the side parts of the backlight LB fixing glue structure 1 and the light guide plate 3, and the LED devices 4 and the FPC board 2 are connected in a welding mode to form an LB device together; the LED module further comprises a light shielding film 5 and a reflecting film 6, wherein the light shielding film 5 is positioned at the top of the FPC board 2, and the reflecting film 6 is positioned at the bottom of the LED device 4 and the light guide plate 3.

Preferably, a diffusion film 7 and a brightness enhancement film 8 are further disposed between the light guide plate 3 and the light shielding film 5, the diffusion film 7 is located on the top of the light guide plate 3, and the brightness enhancement film 8 is located between the diffusion film 7 and the light shielding film 5.

Still include support 9, in this technical scheme, support 9 is integrative support of plastic iron.

Referring to fig. 3, in an upper frame a, a lower frame B, a left frame C, and a right frame C of the backlight, the lower frame B is a light incident side, which is also a main improvement area of the present technical solution.

The backlight LB fixing glue structure 1 mainly plays a role in adhering an LB device and a light guide plate 3, and light transmission is influenced because the backlight LB fixing glue structure is positioned in a light mixing area;

the FPC board 2 mainly plays a role of a connecting line, the LED devices 4 are connected together to form a current loop, and the LEDs can emit light when being electrified;

the LED device 4 is a light source device of a backlight module, and the LED device 4 usually comprises a plurality of LED light sources;

the bracket 9 mainly provides the functions of reflecting and recycling light leakage at the side edges of the supporting module and the light guide piece;

the light guide plate 3 is a transparent light guide part which is a core component, LED light enters the light guide plate 3 from the side surface, and the light is uniformly distributed on the whole visible area of the backlight source through the optical structure of the light guide plate 3;

the reflecting film 6 plays a role in recovering light emitted from the non-light-emitting surface of the light guide piece so as to greatly improve the utilization rate of the light group;

the diffusion film 7 plays a role in homogenizing light rays on the light-emitting surface;

the brightness enhancement film 8 plays a role in shrinking the light emitting angle of the light emitting surface and improving the light intensity within a certain angle;

the light shielding film 5 serves to shield the ineffective area from light leakage and to close and connect other components as a whole.

This kind of narrow limit highlight backlight has adopted foretell backlight LB fixed glue structure 1 back, the light that LED device 4 during operation took place can't get into glue layer (second adhesive linkage 13), because white surface reflectivity is high, light is through glue layer white surface total reflection back light guide plate 3, light utilization ratio has been promoted, no light leak produces, because there is not the reunion of light in glue, can not cause the facula because of glue, and then can narrow photomask 5's width, it is regional to reduce the mixed light, be favorable to realizing narrower frame, realize extremely narrow frame, can reduce mixed light area's width W1 and lower frame B's width W2.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A backlight LB fixed glue structure is characterized in that: including substrate layer (11) and first adhesive linkage (12), second adhesive linkage (13) that are located substrate layer (11) both sides respectively, first adhesive linkage (12) are transparent or non-transparent glue layer, second adhesive linkage (13) are white opaque glue layer, first adhesive linkage (12) are used for bonding with FPC board (2) of backlight, second adhesive linkage (13) are used for bonding with light guide plate (3) of backlight.

2. The backlight LB fixing glue structure of claim 1, wherein: an unlimited color ink layer (14) is arranged between the first bonding layer (12) and the base material layer (11).

3. The backlight LB fixing glue structure according to claim 1 or 2, characterised in that: and a white or colorless ink layer (15) is arranged between the second bonding layer (13) and the base material layer (11).

4. The backlight LB fixing glue structure of claim 1, wherein: the substrate layer (11) is a PET substrate layer.

5. A narrow-edge high-brightness backlight is characterized in that: the backlight LB fixing glue structure comprises an FPC board (2) and a light guide plate (3), wherein the backlight LB fixing glue structure (1) as claimed in any one of claims 1-4 is arranged between the FPC board (2) and the light guide plate (3), the first bonding layer (12) is bonded with the FPC board (2), and the second bonding layer (13) is bonded with the light guide plate (3).

6. A narrow-sided high brightness backlight as claimed in claim 5, wherein: the LED device (4) is arranged on the side portions of the backlight LB fixing glue structure (1) and the light guide plate (3), and the LED device (4) and the FPC board (2) are connected in a welding mode and jointly form an LB device.

7. A narrow-sided high brightness backlight as claimed in claim 6, wherein: the LED light guide plate is characterized by further comprising a light shielding film (5) and a reflecting film (6), wherein the light shielding film (5) is located at the top of the FPC board (2), and the reflecting film (6) is located at the bottoms of the LED devices (4) and the light guide plate (3).

8. A narrow-sided high brightness backlight as recited in claim 7, wherein: a diffusion film (7) and a brightness enhancement film (8) are further arranged between the light guide plate (3) and the shading film (5), the diffusion film (7) is located at the top of the light guide plate (3), and the brightness enhancement film (8) is located between the diffusion film (7) and the shading film (5).

9. A narrow-sided high brightness backlight as claimed in any one of claims 5 to 8, wherein: also comprises a bracket (9).

10. A narrow-sided high brightness backlight as recited in claim 9, wherein: the support (9) is a rubber-iron integrated support.