CN217112966U

CN217112966U - Backlight module and display screen module

Info

Publication number: CN217112966U
Application number: CN202123242833.3U
Authority: CN
Inventors: 杨磊
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-08-02
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a backlight unit and display screen module, backlight unit includes: the frame body comprises a bottom wall and a side wall, and an opening is formed in the side wall; the reflecting sheet, the light guide plate and the optical film layer are sequentially stacked in the frame body, a gap is reserved between one side of the light guide plate facing the opening and the side wall, and the optical film layer does not protrude out of the light guide plate on one side facing the gap; LED lamp pearl and FPC are shaded, and FPC is shaded bonds at the back of diapire, extends to the clearance through the opening to FPC is shaded is parallel to the diapire and is equipped with LED lamp pearl in the part that lies in the clearance. In the utility model, when the backlight FPC is replaced, the light guide plate and the optical film layer can not be damaged, so that other parts of the backlight module can still be continuously used, and the resource waste is reduced; and the structure is simple, and the processing and the assembly are convenient.

Description

Backlight module and display screen module

Technical Field

The utility model relates to a show technical field, especially relate to a backlight unit and display screen module.

Background

In the production process of the display screen module, the damage of the LED lamp beads of the backlight module is a common bad phenomenon. The damage of the LED lamp bead' can be caused by various reasons, such as static electricity or other various accidents. In the current backlight module scheme, the damaged LED lamp beads are inconvenient to replace, and the LED lamp beads are generally replaced by a new backlight module and an old backlight module. However, other parts of the backlight module can still be used continuously, which causes resource waste.

As shown in fig. 1, the conventional backlight module includes a frame 1 ', a light guide plate 2' disposed in the frame 1 ', and a backlight FPC provided with LED beads', the LED beads 'are soldered on the backlight FPC', and the backlight FPC 'is assembled with the light guide plate 2'. If the backlight FPC' is detached, the assembly integrity of the backlight module is damaged, and the whole backlight module is damaged. Therefore, in the general backlight module scheme, the backlight FPC ' cannot be detached, and the backlight FPC ' cannot be replaced or the backlight FPC ' cannot be detached for maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a backlight module and display screen module for among the solution prior art, need change whole backlight unit's problem again after LED lamp pearl damages.

In order to solve the above problem, the utility model adopts the following technical scheme:

provided is a backlight module, including:

the frame body comprises a bottom wall and a side wall which is arranged on the front surface of the bottom wall and surrounds the bottom wall, and an opening is formed in the side wall;

a reflective sheet disposed in the frame body;

a light guide plate stacked on the reflective sheet with a gap left between a side facing the opening and the sidewall;

an optical film layer laminated to the light guide plate and not protruding from the light guide plate at a side facing the gap;

the backlight FPC is bonded on the back face of the bottom wall and extends to the gap through the opening, and the part of the backlight FPC located in the gap is parallel to the bottom wall and is provided with the LED lamp beads.

Optionally, the backlight FPC is misaligned with the light guide plate at an end of the gap along a direction from the opening to the light guide plate.

Optionally, a top surface of a portion of the backlight FPC located in the gap is flush with a top surface of the optical film layer.

Optionally, a light shielding adhesive is disposed on a top surface of a portion of the backlight FPC located in the gap.

Optionally, the LED lamp bead is welded to the backlight FPC.

Optionally, the optical film layer includes a brightness enhancement film and a diffusion film stacked in sequence.

Still provide a display screen module, include above-mentioned any one the backlight unit.

Optionally, a portion of the backlight FPC located in the gap abuts on the TFT substrate of the display panel.

Optionally, a portion of the backlight FPC located in the gap is bonded to the TFT substrate.

Optionally, the backlight FPC is bonded to one end of the bottom wall, is bound to the main screen FPC of the display panel, and is electrically connected to the main screen FPC.

The utility model discloses a technical scheme can reach following beneficial effect:

when the LED lamp beads need to be replaced, the backlight FPC part positioned in the gap is pulled out from the opening of the side wall of the frame body, the backlight FPC part bonded with the bottom wall of the frame body is torn off, and then the backlight FPC is replaced again. When the backlight FPC is replaced, the part of the backlight FPC without the LED lamp beads is bonded on the bottom wall of the frame body, so that the part of the backlight FPC with the LED lamp beads extends into the gap from the opening of the side wall of the frame body. Therefore, when the backlight FPC is replaced, the light guide plate and the optical film layer are not damaged, other parts of the backlight module can still be used continuously, and resource waste is reduced; and the structure is simple, and the processing and the assembly are convenient.

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 structural diagram of a display screen module disclosed in the prior art;

fig. 2 is an exploded view of a display screen module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a display screen module according to an embodiment of the present invention.

Wherein the following reference numerals are specifically included in figures 1-3:

a frame body-1'; a light guide plate-2'; LED lamp bead-3'; backlight FPC-4';

a backlight module-1; a display panel-2; a frame body-11; opening-111; a light guide plate-12; an optical film layer-13; LED lamp bead-14; a backlight FPC-15; shading glue-16; a TFT substrate-21; a main screen FPC-22.

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. 2 and fig. 3, the backlight module 1 of the present invention includes a frame 11, a reflective sheet, a light guide plate 12, an optical film layer 13, LED lamp beads 14, and a backlight FPC 15. The frame 11 includes an accommodating cavity surrounded by a bottom wall and a side wall, and an opening 111 is formed in one side of the side wall, so that the accommodating cavity is communicated with the outside through the opening 111. The reflective sheet, the light guide plate 12 and the optical film layer 13 are sequentially stacked in the accommodating cavity, and the reflective sheet is closer to the cavity bottom of the accommodating cavity. The light guide plate 12 has a gap between a side facing the opening 111 of the side wall of the housing 11 and the side wall of the housing 11. The optical film layer 13 does not protrude from the light guide plate 12 on the side facing the gap, i.e., the side facing the side wall opening 111 of the frame 11. The backlight FPC15 extends from the back surface of the bottom wall of the frame 11 to the side wall of the frame 11, and then extends to the gap through the side wall opening 111 of the frame 11, the backlight FPC15 is bonded to the bottom wall of the frame 11, and the backlight FPC15 is parallel to the bottom wall of the frame 11 at the portion located in the gap. The LED beads 14 are fixed on the portion of the backlight FPC15 that is located in the gap.

When the LED lamp beads 14 are damaged and need to be replaced, the backlight FPC15 portion located in the gap is pulled out from the side wall opening 111 of the frame 11, the backlight FPC15 portion bonded to the bottom wall of the frame 11 is torn off, the backlight FPC15 is replaced again, the backlight FPC15 portion where the LED lamp beads 14 are not located is bonded to the bottom wall of the frame 11, and the backlight FPC15 portion where the LED lamp beads 14 are located extends into the gap from the side wall opening 111 of the frame 11. Therefore, when the backlight FPC15 is replaced, the light guide plate 12 and the optical film layer 13 are not damaged, other parts of the backlight module 1 can still be used continuously, and the resource waste is reduced.

The frame 11 may be a frame made of plastic, and the main structure of the frame is the same as that of a conventional frame, including a frame made of plastic and having a bottom wall and side walls, and a frame made of plastic and disposed on the side walls of the frame. The iron frame and the rubber frame are opened with holes to form the opening 111.

The optical film layer 13 also has the same structure as usual, and includes a brightness enhancement film, a diffusion film, and the like. The thicknesses of the optical film layer 13 and other layers may be the same as those of the conventional optical film layer, and will not be described in detail herein.

The portion of the backlight FPC15 located in the gap may not extend to the light guide plate 12, that is, along the direction from the side wall opening 111 of the frame 11 to the light guide plate 12, and the portion of the backlight FPC15 located in the gap may be offset from the light guide plate 12. Thus, when the backlight FPC15 is attached and detached, the risk of damage to the light guide plate 12, the optical film layer 13, and the like by the backlight FPC15 can be reduced.

The top surface of the backlight FPC15 part in the gap may be provided with a light shielding glue 16, the light shielding glue 16 extends from the end of the backlight FPC15 to the side wall of the frame 11, and the light shielding glue 16 shields light to prevent light leakage of the backlight module 1.

The top surface of the portion of backlit FPC15 that is located in the gap may be flush with the top surface of optical film layer 13. After the display panel 2 is fixed to the frame 11, the TFT substrate 21 can be brought into contact with the top surface of the backlight FPC15, thereby improving the mounting reliability of the backlight FPC 15. And further, the backlight FPC15 may be adhered to the back surface of the TFT substrate 21 by the light-shielding adhesive 16, further improving the mounting firmness of the backlight FPC 15. At this time, when the backlight FPC15 needs to be attached and detached, the display panel 2 is detached from the housing 11, and then the backlight FPC15 is attached and detached.

The LED lamp beads 14 can be fixed on the backlight FPC15 in a welding mode, and processing and manufacturing are facilitated. The number of the LED lamp beads 14, the size of the LED lamp beads 14, the gaps among the LED lamp beads 14 and the like can be specifically set according to requirements, so that various use requirements are met.

The utility model discloses a display screen module includes display panel 2 and foretell backlight unit 1. In the display screen module, when the LED lamp beads 14 are damaged and need to be replaced, the backlight FPC15 part in the gap is pulled out from the side wall opening 111 of the frame 11, the backlight FPC15 part bonded with the bottom wall of the frame 11 is torn off, then the backlight FPC15 is replaced again, the backlight FPC15 part without the LED lamp beads 14 is bonded to the bottom wall of the frame 11, and the backlight FPC15 part with the LED lamp beads 14 extends into the gap from the side wall opening 111 of the frame 11. Therefore, when the backlight FPC15 is replaced, the light guide plate 12 and the optical film layer 13 are not damaged, other parts of the backlight module 1 can still be used continuously, and the resource waste is reduced.

The display panel 2 has a structure similar to that of a normal display panel, and includes a TFT substrate 21, a liquid crystal, a CF substrate, and the like. The TFT substrate 21 is provided with a driver IC and a main screen FPC 22.

The backlight FPC15 part positioned in the gap is abutted on the TFT substrate 21 of the display panel 2 at the surface without the LED lamp beads 14, and the backlight FPC15 is supported by the TFT substrate 21 in an auxiliary way, so that the installation firmness of the backlight FPC15 is improved. And further, the backlight FPC15 may be adhered to the back surface of the TFT substrate 21 by the light-shielding adhesive 16, further improving the mounting reliability of the backlight FPC 15. In this case, when the backlight FPC15 needs to be attached and detached, the display panel 2 is detached from the housing 11, and then the backlight FPC15 is attached and detached.

The portion of the backlight FPC15 bonded to the bottom wall of the frame 11 has its one end bonded to the main screen FPC22 of the display panel 2 and electrically connected to the main screen FPC22, and the main screen FPC22 is electrically connected to the main circuit board of the display device through a connector. When the backlight FPC15 needs to be removed, the backlight FPC15 is removed from the main screen FPC22, then the display panel 2 is removed, and the backlight FPC15 is removed from the backlight module 1. So set up, simple structure, the processing equipment of being convenient for.

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

1. A backlight module, comprising:

a reflection sheet disposed in the frame body;

2. The backlight module according to claim 1, wherein the backlight FPC is misaligned with the light guide plate at an end thereof located in the gap in a direction from the opening to the light guide plate.

3. A backlight module according to claim 2, wherein a top surface of the portion of the backlight FPC located in the gap is flush with a top surface of the optical film layer.

4. A backlight module according to claim 2, wherein a light-shielding glue is disposed on a top surface of a portion of the backlight FPC located in the gap.

5. The backlight module according to any one of claims 1 to 4, wherein the LED beads are soldered to the backlight FPC.

6. A backlight module according to any of claims 1-4, wherein the optical film layers comprise a brightness enhancing film and a diffuser film laminated in sequence.

7. A display screen module, comprising a display panel and the backlight module of any one of claims 1-6.

8. The display screen module of claim 7, wherein the portion of the backlight FPC located in the gap abuts against the TFT substrate of the display panel.

9. The display screen module of claim 8, wherein the portion of the backlight FPC located in the gap is bonded to the TFT substrate.

10. A display screen module according to any one of claims 7 to 9, wherein the backlight FPC is bonded to the main screen FPC of the display panel at one end of the bottom wall and is electrically connected to the main screen FPC.