CN216053652U

CN216053652U - Direct type backlight module with optimized lamp panel and display device

Info

Publication number: CN216053652U
Application number: CN202121643194.9U
Authority: CN
Inventors: 曹俊威; 冯超; 刘子平
Original assignee: Shenzhen Hadbest Electronics Co ltd
Current assignee: Shenzhen Hadbest Electronics Co ltd
Priority date: 2021-01-23
Filing date: 2021-07-16
Publication date: 2022-03-15
Anticipated expiration: 2031-07-16

Abstract

The utility model provides an optimize straight following formula backlight unit of lamp plate, includes a plurality of circuit boards and underframe, and each circuit board is fixed in the underframe each other at intervals, installs a plurality of light sources on each circuit board. The direct type backlight module with the optimized lamp panel has high assembly efficiency and high product qualification rate, and saves the manufacturing cost. The utility model also relates to a display device.

Description

Direct type backlight module with optimized lamp panel and display device

Technical Field

The utility model relates to the technical field of lighting display equipment, in particular to a direct type backlight module and a display device for optimizing a lamp panel.

Background

At present, the backlight of straight following formula includes lamp plate and underframe, and the lamp plate is usually pasted in the underframe with the heat conduction glue of whole face, and it has emitting diode to distribute the paster according to the determining deviation on the lamp plate. However, when the size of the lamp panel is larger, the lamp panel is often uneven due to the larger size of the lamp panel, so that the lamp panel is not easy to work when attached to the bottom frame; the whole lamp panel is easy to be partially tilted, and the light emitting uniformity of the light is influenced; simultaneously, when the lamp plate size is great, still can be because of the poor quality problem that brings of lamp plate radiating effect. Moreover, the lamp panel is adhered with the whole heat-conducting glue, so that the problems of bubbles and the like of the heat-conducting glue are easily caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a direct type backlight module with an optimized lamp panel, which has high assembly efficiency and product yield, and saves manufacturing cost.

The utility model provides an optimize straight following formula backlight unit of lamp plate, includes a plurality of circuit boards and underframe, and each circuit board is fixed in the underframe each other at intervals, installs a plurality of light sources on each circuit board.

In an embodiment of the utility model, a plurality of heat conducting adhesives are disposed in the bottom frame, each heat conducting adhesive is disposed corresponding to each circuit board, and the circuit boards are fixed in the bottom frame through the heat conducting adhesives.

In an embodiment of the present invention, the bottom frame includes a bottom plate and a frame connected to the bottom plate, the circuit boards are disposed at intervals along a length direction of the bottom plate, and the length direction of each circuit board is parallel to a width direction of the bottom plate.

In an embodiment of the utility model, the direct type backlight module of the optimized lamp panel further includes a system board and a plurality of flat cables, one end of each flat cable is electrically connected to the system board, and the other end of each flat cable is electrically connected to each circuit board.

In an embodiment of the utility model, through holes are formed in the bottom plate and the heat conductive adhesive, a connection socket corresponding to the through holes is arranged on the circuit board, and the flat cable penetrates through the through holes to be electrically connected with the connection socket.

In an embodiment of the present invention, an accommodating cavity is formed between the bottom plate and the side frame, the direct type backlight module of the optimized lamp panel further includes a diffusion plate, a diffusion film, a brightness enhancement film and a brightness enhancement film, the diffusion plate is disposed in the accommodating cavity, the diffusion plate covers each of the circuit boards, the diffusion film is disposed on the diffusion plate, the brightness enhancement film is fixed on the diffusion film, and the brightness enhancement film is fixed on the brightness enhancement film.

In an embodiment of the utility model, the direct-type backlight module for optimizing the lamp panel further includes a middle frame, the middle frame includes a side frame and a top frame, the side frame is connected with the side frame, and the top frame covers the side edge of the brightness enhancement film.

In the embodiment of the present invention, a plurality of clamping grooves are formed in one side of the frame, which is close to the accommodating cavity, a plurality of clamping blocks are arranged on the side frame, the side frame is arranged in the accommodating cavity, and the clamping blocks are clamped in the clamping grooves.

In an embodiment of the utility model, each of the circuit boards is a PCB, a flexible circuit board, or an aluminum substrate.

The utility model also provides a display device which comprises the direct type backlight module with the optimized lamp panel.

The direct type backlight module of the optimized lamp panel comprises a plurality of circuit boards, and each circuit board is respectively fixed in the bottom frame, so that the problem that the circuit boards are difficult to fix in the bottom frame due to the fact that the circuit boards on the whole surface are overlarge in size can be solved; meanwhile, the circuit boards are fixed in the bottom frame at intervals, so that the expansion and contraction coefficient of the circuit boards is reduced, and the influence on optimizing the light emitting uniformity of the direct type backlight module of the lamp panel caused by the fact that the circuit boards are separated from the inner surface of the bottom frame or the circuit boards are partially tilted on the inner surface of the bottom frame due to the fact that the circuit boards are in high and low temperature environments alternately for a long time is avoided. Therefore, the direct type backlight module with the optimized lamp panel has high assembly efficiency and high product qualification rate, and the manufacturing cost is saved.

Drawings

Fig. 1 is a schematic bottom view of a direct-type backlight module with an optimized lamp panel according to the present invention.

Fig. 2 is a schematic view of a split structure of a direct type backlight module of an optimized lamp panel according to the present invention.

Detailed Description

The application provides a straight following formula backlight unit of optimizing lamp plate.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to facilitate understanding of those skilled in the art, the present application provides a specific implementation process of the technical solution provided by the present application through the following embodiments.

Fig. 1 is a schematic bottom view of a direct type backlight module of an optimized lamp panel according to the present invention, and fig. 2 is a schematic split view of the direct type backlight module of the optimized lamp panel according to the present invention, as shown in fig. 1 and 2, the direct type backlight module of the optimized lamp panel includes a plurality of circuit boards 11 and a bottom frame 13, the circuit boards 11 are fixed in the bottom frame 13 at intervals, and a plurality of light sources 12 are installed on the circuit boards 11. In the present embodiment, the light source 12 is a light emitting diode, and the light emitting diodes are uniformly arranged on the circuit board 11.

The direct type backlight module of the optimized lamp panel comprises a plurality of circuit boards 11, and each circuit board 11 is respectively fixed in the bottom frame 13, so that the problem that the circuit boards 11 are difficult to fix in the bottom frame 13 due to the fact that the whole circuit boards 11 are overlarge in size can be solved; meanwhile, the circuit boards 11 are fixed in the bottom frame 13 at intervals, which is beneficial to reducing the expansion coefficient of the circuit boards 11, and also avoids the circuit boards 11 from separating from the inner surface of the bottom frame 13 or the circuit boards 11 from locally tilting on the inner surface of the bottom frame 13 due to being in high and low temperature environments for a long time, thereby influencing and optimizing the light-emitting uniformity of the direct type backlight module of the lamp panel. Therefore, the direct type backlight module with the optimized lamp panel has high assembly efficiency and high product qualification rate, and the manufacturing cost is saved.

Furthermore, a plurality of heat conducting adhesives 14 are disposed in the bottom frame 13, each heat conducting adhesive 14 is disposed corresponding to each circuit board 11, and the circuit boards 11 are fixed in the bottom frame 13 through the heat conducting adhesives 14. In this embodiment, the shape and size of a single piece of thermal conductive adhesive 14 respectively correspond to the shape and size of a single circuit board 11, so as to facilitate better work attachment, and solve the problem that bubbles appear in the thermal conductive adhesive 14 when a plurality of circuit boards 11 are attached to the same piece of thermal conductive adhesive 14 at the same time.

In another preferred embodiment, each circuit board 11 and the bottom frame 13 can be fixed by a snap structure (not shown), so as to facilitate the removal and maintenance of each circuit board 11 and the electronic components 16 on the circuit board 11.

Further, the bottom frame 13 includes a bottom plate 131 and a frame 132 connected to the bottom plate 131, the circuit boards 11 are disposed at intervals along a length direction of the bottom plate 131, and the length direction of each circuit board 11 is parallel to a width direction of the bottom plate 131. In the present embodiment, the bottom plate 131 is rectangular, the circuit board 11 is rectangular, and the long side of the circuit board 11 is parallel to the wide side of the bottom plate 131.

In another preferred embodiment, the bottom plate 131 is rectangular, the circuit board 11 is rectangular, and the long side of the circuit board 11 is parallel to the long side of the bottom plate 131.

Further, the direct type backlight module of the optimized lamp panel further includes a system board and a plurality of flat cables (not shown), one end of each flat cable is electrically connected to the system board (not shown), and the other end of each flat cable is electrically connected to each circuit board 11. In the present embodiment, the system board is used for driving power supply.

Further, the bottom plate 131 and the thermal conductive adhesive 14 are both provided with a through hole 101, the circuit board 11 is provided with a connection socket 15 corresponding to the through hole 101, and the flat cable passes through the through hole 101 and is electrically connected with the connection socket 15. In the present embodiment, the circuit board 11 is further provided with an electronic component 16, and the shape of the through hole 101 corresponds to the shape of the connection socket 15 and the electronic component 16, so as to facilitate the alignment mounting of the circuit board 11 to the bottom plate 131.

Further, an accommodating cavity 102 is formed between the bottom plate 131 and the frame 132, the direct type backlight module optimizing the lamp panel further comprises a diffusion plate 17, a diffusion film 18, a brightness enhancement film 19 and a brightness enhancement film 21 which are arranged in the accommodating cavity 102, the diffusion plate 17 covers the circuit boards 11, the diffusion film 18 is arranged on the diffusion plate 17, the brightness enhancement film 19 is fixed on the diffusion film 18, and the brightness enhancement film 21 is fixed on the brightness enhancement film 19. In the present embodiment, the diffusion plate 17 can sufficiently scatter incident light, and then, the diffusion film 18 is used to modify the light into a uniform surface light source 12 to achieve the effect of optical diffusion; the brightness enhancement film 19 is used for collecting the light from the diffusion film 18 to the front direction to improve the brightness, and the brightness enhancement film 21 is DBEF, which not only can enhance the brightness, but also has no influence on the viewing angle.

Further, the surface of the bottom plate 131 is also provided with a plurality of scribing lines, which can facilitate the alignment installation of the circuit boards 11 on the bottom plate 131, and can also reasonably control the gaps between the circuit boards 11.

Further, after the circuit board 11 is attached to the bottom plate 131 through the thermal conductive adhesive 14, the circuit board 11 can be pressed tightly by a pressing jig to be firmly attached to the bottom plate 131, and then the diffuser plate 17, the brightness enhancement film 19, the brightness enhancement film 21 and other optical films are mounted and placed.

Further, the diffusion film 18, the brightness enhancement film 19 and the brightness enhancement film 21 may be fixed to each other by a double-sided tape (not shown) on one side, and then the diffusion film 18 is fixed to the diffusion plate 17 by a film fixing tape 22 to prevent the occurrence of loose noise.

Further, optimize straight following formula backlight unit of lamp plate still includes well frame 23, and well frame 23 includes side frame 231 and top frame 232, and side frame 231 is connected with top frame 232, and side frame 231 connects in frame 132, and top frame 232 covers the side of brightness enhancement film 21.

Further, a plurality of clamping grooves 24 are formed in one side, close to the accommodating cavity 102, of the frame 132, a plurality of clamping blocks 25 are arranged on the side frame 231, the side frame 231 is arranged in the accommodating cavity 102, and the clamping blocks 25 are clamped in the clamping grooves 24.

Further, the top frame 232 is further fixed with a foam tape 26, and the top frame 232 is fixed on the display panel (not shown) through the foam tape 26.

Further, the circuit board 11 is a PCB, a flexible circuit board 11 or an aluminum substrate, but not limited thereto.

The utility model also relates to a display device which comprises the direct type backlight module of the optimized lamp panel. In this embodiment, the display device is, for example, an automobile display screen, an on-vehicle central control, an on-vehicle instrument display, an on-vehicle streaming media rearview mirror display, and an on-vehicle HUD display, but not limited thereto.

The present invention is not limited to the specific details of the above-described embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.

Claims

1. The utility model provides an optimize straight following formula backlight unit of lamp plate, its characterized in that includes a plurality of circuit boards (11) and underframe (13), each circuit board (11) are fixed at intervals each other in underframe (13), each install a plurality of light sources (12) on circuit board (11), be equipped with a plurality of heat-conducting glue (14) in underframe (13), each heat-conducting glue (14) and each circuit board (11) correspond the setting, circuit board (11) pass through heat-conducting glue (14) are fixed in underframe (13).

2. The direct type backlight module of the optimized lamp panel according to claim 1, wherein the bottom frame (13) includes a bottom plate (131) and a frame (132) connected to the bottom plate (131), the circuit boards (11) are spaced apart from each other along a length direction of the bottom plate (131), and the length direction of each circuit board (11) is parallel to a width direction of the bottom plate (131).

3. The direct type backlight module of the optimized lamp panel according to claim 2, further comprising a system board and a plurality of flat cables, wherein one end of each flat cable is electrically connected to the system board, and the other end of each flat cable is electrically connected to each circuit board (11).

4. The direct type backlight module of the optimized lamp panel according to claim 3, wherein the bottom plate (131) and the heat conducting glue (14) are both provided with a through hole (101), the circuit board (11) is provided with a connecting socket (15) corresponding to the through hole (101), and the flat cable passes through the through hole (101) and is electrically connected with the connecting socket (15).

5. The direct type backlight module of the optimized lamp panel according to claim 2, wherein a receiving cavity (102) is formed between the bottom plate (131) and the frame (132), the direct type backlight module of the optimized lamp panel further includes a diffuser plate (17), a diffuser film (18), a brightness enhancement film (19) and a brightness enhancement film (21) disposed in the receiving cavity (102), the diffuser plate (17) covers each of the circuit boards (11), the diffuser film (18) is disposed on the diffuser plate (17), the brightness enhancement film (19) is fixed on the diffuser film (18), and the brightness enhancement film (21) is fixed on the brightness enhancement film (19).

6. The direct type backlight module with an optimized lamp panel according to claim 5, further comprising a middle frame (23), wherein the middle frame (23) comprises a side frame (231) and a top frame (232), the side frame (231) is connected to the side frame (132), and the top frame (232) covers the side edge of the brightness enhancement film (21).

7. The direct type backlight module with an optimized lamp panel according to claim 6, wherein a plurality of clamping grooves (24) are formed in one side of the frame (132) close to the receiving cavity (102), a plurality of clamping blocks (25) are formed on the side frame (231), the side frame (231) is disposed in the receiving cavity (102), and the clamping blocks (25) are clamped in the clamping grooves (24).

8. The direct type backlight module with the optimized lamp panel according to any one of claims 1 to 7, wherein each of the circuit boards (11) is a PCB, a flexible circuit board (11) or an aluminum substrate.

9. A display device, characterized in that, it includes the direct type backlight module of the optimized lamp panel of any one of claims 1 to 8.