CN216562314U

CN216562314U - Vehicle-mounted backlight module with clearance structure designed at bending part of FPC (flexible printed circuit) and vehicle-mounted display device

Info

Publication number: CN216562314U
Application number: CN202123091820.0U
Authority: CN
Inventors: 赖小波; 曹俊威; 刘子平; 冯超
Original assignee: Shenzhen Hadbest Electronics Co ltd
Current assignee: Shenzhen Hadbest Electronics Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-05-17
Anticipated expiration: 2031-12-09

Abstract

The utility model provides a vehicle-mounted backlight module with a clearance structure designed at a bending part of an FPC (flexible printed circuit), which comprises an iron frame and a flexible circuit board, wherein the iron frame comprises a bottom plate and a side frame fixedly connected to the bottom plate, an accommodating cavity for accommodating a diaphragm is formed between the side frame and the bottom plate, a first clearance groove is formed in the inner wall of the accommodating cavity of the side frame, a through hole corresponding to the first clearance groove is formed in the bottom plate, the flexible circuit board comprises a backlight source section, a bending section and an extension section, the backlight source section is fixed on the inner wall of the side frame, the extension section is arranged outside the accommodating cavity, the bending section is overlapped on the backlight source section, the stacking part of the bending section and the backlight source section is arranged corresponding to the first clearance groove, one end of the bending section is electrically connected with the backlight source section, and the other end of the bending section penetrates through the through hole and is electrically connected with the extension section. The vehicle-mounted backlight source die with the clearance structure at the bending part of the FPC can avoid the phenomenon of bright edges and reduce the cost. The utility model also relates to a vehicle-mounted display device.

Description

Vehicle-mounted backlight module with clearance structure designed at bending part of FPC (flexible printed circuit) and vehicle-mounted display device

Technical Field

The utility model relates to the technical field of display screens, in particular to a vehicle-mounted backlight module with a clearance structure designed at a bending part of an FPC (flexible printed circuit) and a vehicle-mounted display device.

Background

The existing lower iron frame belongs to a metal die casting and is formed by die casting, and is used for bearing materials such as a reflective film, a light guide plate, a diffusion film, a brightness enhancement film and a light control film which are arranged in a backlight.

SUMMERY OF THE UTILITY MODEL

In view of this, the vehicle-mounted backlight module with the void-avoiding structure designed at the bending position of the FPC can avoid the occurrence of a bright edge phenomenon, and reduce the cost.

The utility model provides a vehicle-mounted backlight module of empty structure is kept away in design of FPC kink, including chase and flexible circuit board, the chase includes bottom plate and the side frame of fixed connection on the bottom plate, form the holding chamber of holding diaphragm between side frame and the bottom plate, the inner wall that the side frame is located the holding chamber is equipped with the first groove of dodging, the bottom plate is equipped with the via hole that corresponds the setting with the first groove of dodging, the flexible circuit board includes the source section of being shaded, bending segment and extension section, the source section of being shaded is fixed on the inner wall of side frame, the extension section sets up outside the holding chamber, bending segment folds and establishes on the source section of being shaded, bending segment and the department of piling up of source section of being shaded correspond the setting with the first groove of dodging, bending segment's one end and source section of being shaded electric connection, bending segment's the other end passes the via hole and extends section electric connection.

In the utility model, a positioning piece is arranged in the first avoidance groove, one end of the positioning piece is fixedly connected to the side frame, a clamping gap is formed between the other end of the positioning piece and the groove wall of the first avoidance groove, and the bending section is arranged in the clamping gap.

In the utility model, an adhesive tape is arranged on one side of the bending section close to the first avoidance groove, and the adhesive tape adheres the bending section in the first avoidance groove.

In the utility model, the vehicle-mounted backlight module with the clearance structure at the bending part of the FPC comprises a light guide plate, the light guide plate is arranged in the accommodating cavity, a second avoiding groove is formed in the side wall of the light guide plate, which is opposite to the side frame, the second avoiding groove is arranged corresponding to the first avoiding groove, and the stacking part of the bending section and the backlight source section is positioned between the first avoiding groove and the second avoiding groove.

In the utility model, the side frame comprises a first side plate and a second side plate, the first side plate and the second side plate are arranged vertically, one end of the backlight source section is fixedly connected to the first side plate, the other end of the backlight source section is fixedly connected to the second side plate, and the first avoiding groove is formed in the second side plate.

In the utility model, the backlight source section comprises a light source mounting part and a connecting part, the light source mounting part is fixedly connected to the first side plate, and the connecting part is fixedly connected to the second side plate.

In the utility model, the bottom plate is also provided with an anti-cutting film, one end of the anti-cutting film is connected to the inner surface of the bottom plate, the other end of the anti-cutting film penetrates through the through hole to be connected to the outer surface of the bottom plate, and the anti-cutting film is positioned between the bending section and the hole wall of the through hole.

In the utility model, the flexible pad comprises a first pasting layer, a buffer layer and a second pasting layer, wherein the buffer layer is arranged between the first pasting layer and the second pasting layer, the first pasting layer is attached to the bending section, and the second pasting layer is attached to the hole wall of the via hole.

In the utility model, the vehicle-mounted backlight module with the clearance structure at the bending part of the FPC comprises a reflecting film and an optical diaphragm, wherein the reflecting film is arranged on the bottom plate, the light guide plate is arranged on the reflecting film, and the optical diaphragm is arranged on the light guide plate.

The utility model also relates to a vehicle-mounted display device which comprises the vehicle-mounted backlight module with the FPC bending part designed with the clearance structure.

According to the vehicle-mounted backlight module with the avoidance structure at the bending part of the FPC, the first avoidance groove is formed in the inner wall of the accommodating cavity and corresponds to the via hole, the first avoidance groove is used for placing the bending section, the phenomenon of bright edges caused by too much occupied space of the bending section is avoided, the manufacturing cost of the vehicle-mounted backlight module is reduced, and the product quality and the use experience of a customer are improved.

Drawings

Fig. 1 is a schematic view of a split structure of an iron frame and a flexible circuit board according to a first embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Fig. 3 is a schematic view of a split structure according to the first embodiment of the present invention.

Fig. 4 is a partially enlarged schematic structural view of a second embodiment of the present invention.

Fig. 5 is a partially enlarged schematic structural view of a third embodiment of the present invention.

Detailed Description

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.

First embodiment

Fig. 1 is a schematic view of a split structure of an iron frame and a flexible circuit board according to a first embodiment of the present invention, fig. 2 is a schematic view of a partially enlarged structure of fig. 1, fig. 3 is a schematic view of a split structure according to a first embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, a vehicle-mounted backlight module with a void-avoiding structure designed at a bending portion of an FPC includes an iron frame 11 and a flexible circuit board 12, the iron frame 11 includes a bottom plate 111 and a side frame 112 fixedly connected to the bottom plate 111, an accommodating cavity 101 for accommodating a diaphragm is formed between the side frame 112 and the bottom plate 111, a first avoiding groove 102 is formed on an inner wall of the accommodating cavity 101 of the side frame 112, the bottom plate 111 is provided with a via hole 103 corresponding to the first avoiding groove 102, the flexible circuit board 12 includes a backlight source section 121, a bending section 122 and an extension section 123, the backlight source section 121 is fixed on an inner wall of the side frame 112, the extension section 123 is disposed outside the accommodating cavity 101, the bending section 122 is stacked on the backlight source section 121, the stacking position of the bending section 122 and the backlight source section 121 is disposed corresponding to the first avoiding groove 102, one end of the bending section 122 is electrically connected to the backlight source section 121, and the other end of the bending section 122 passes through the via hole 103 and is electrically connected to the extending section 123. In this embodiment, the bottom plate 111 and the side frame 112 are an integral structure, the side frame 112 includes a first surface 1123 and a second surface (not shown) that are disposed opposite to each other, the first surface 1123 is disposed away from the bottom plate 111, the second surface is disposed close to the bottom plate 111, the first avoiding groove 102 penetrates through the first surface 1123 and the second surface and is communicated with the via hole 103, and two opposite groove walls of the first avoiding groove 102 are arc surfaces to prevent the flexible circuit board 12 from being cut or broken.

According to the vehicle-mounted backlight module with the avoidance structure designed at the FPC bending part, the first avoidance groove 102 is formed in the inner wall of the accommodating cavity 101, the first avoidance groove 102 is arranged corresponding to the via hole 103, the first avoidance groove 102 is used for placing the bending section 122, the phenomenon that the bending section 122 is bright-edged due to too much occupied space is avoided, the manufacturing cost of the vehicle-mounted backlight module is reduced, and the quality of a product and the use experience of a client are improved.

Further, the side frame 112 includes a first side plate 1121 and a second side plate 1122, the first side plate 1121 and the second side plate 1122 are vertically disposed, one end of the backlight source segment 121 is fixedly connected to the first side plate 1121, the other end of the backlight source segment 121 is fixedly connected to the second side plate 1122, and the first avoiding groove 102 is disposed on the second side plate 1122. In the present embodiment, the first side plate 1121 is located in the long axis direction of the side frame 112, and the second side plate 1122 is located in the short axis direction of the side frame 112.

Further, the backlight source segment 121 includes a light source mounting portion 1211 and a connecting portion 1212, the light source mounting portion 1211 is fixedly connected to the first side plate 1121, and the connecting portion 1212 is fixedly connected to the second side plate 1122. In this embodiment, the light source installation portion 1211 is fixedly connected to the first side plate 1121 through a double-sided thermal-conductive adhesive tape, and a plurality of LED lamps are disposed on the light source installation portion 1211 for providing light for the vehicle-mounted backlight module.

Further, the bottom plate 111 is further provided with a cut-preventing film (not shown), one end of the cut-preventing film is connected to the inner surface of the bottom plate 111, the other end of the cut-preventing film passes through the via hole 103 and is connected to the outer surface of the bottom plate 111, and the cut-preventing film is located between the bending section 122 and the hole wall of the via hole 103. In the embodiment, the anti-cutting film is used to prevent the burr of the via hole 103 from cutting the flexible circuit board 12, so as to avoid the short circuit phenomenon.

Further, the flexible pad 15 includes a first adhesive layer (not shown), a buffer layer (not shown), and a second adhesive layer (not shown), wherein the buffer layer is disposed between the first adhesive layer and the second adhesive layer, the first adhesive layer is attached to the bending section 122, and the second adhesive layer is attached to the hole wall of the via hole 103. In this embodiment, the material of the buffer layer is, for example, silicon gel or the flexible pad 15, and the first adhesive layer and the second adhesive layer are, for example, liquid adhesive or double-sided adhesive, but not limited thereto.

Further, the vehicle-mounted backlight module with the clearance structure at the bending part of the FPC includes a reflective film 16 and an optical film, the reflective film 16 is disposed on the bottom plate 111, the light guide plate 14 is disposed on the reflective film 16, and the optical film is disposed on the light guide plate 14. In this embodiment, the reflective film 16 is fixedly attached to the bottom plate 111 by a double-sided adhesive tape, the light guide plate 14 is fixedly attached to the reflective film 16 by a double-sided adhesive tape, and the optical film sheet is fixedly attached to the light guide plate 14 by a double-sided adhesive tape.

In another preferred embodiment, the light guide plate 14 can be further fixedly connected between the optical film and the bottom plate 111 by means of a stopper and a stopper groove.

Further, the optical film includes a diffusion film 171, a lower brightness enhancement film 172 and an upper brightness enhancement film 173, the diffusion film 171 is fixedly connected to the light guide plate 14, the lower brightness enhancement film 172 is fixedly connected to the diffusion film 171, and the upper brightness enhancement film 173 is fixedly connected to the lower brightness enhancement film 172, wherein the film and the film can be fixedly connected through a double-faced adhesive tape, or can be fixedly connected through a fixture block and a clamping groove.

Further, the vehicle-mounted backlight module with the clearance structure designed at the bending part of the FPC further comprises a middle frame 18, the middle frame 18 is provided with a mounting groove, a mounting block is arranged on the side frame 112, and the mounting block is fixedly connected with the middle frame 18 and the iron frame 11 in the mounting groove.

Further, the vehicle-mounted backlight module of the FPC bent part design clearance structure further comprises foam rubber 19, the foam rubber 19 is fixedly connected to the middle frame 18, and the foam rubber 19 is used for buffering and fixing the display screen.

Second embodiment

Fig. 4 is a schematic view of a partial enlarged structure of a second embodiment of the present invention, and as shown in fig. 4, the vehicle-mounted backlight module with a void-avoiding structure at the FPC bending position of the present embodiment is substantially the same in structure as the vehicle-mounted backlight module with a void-avoiding structure at the FPC bending position of the first embodiment, and the difference is that the structure of the void-avoiding groove is different.

Specifically, a positioning element 13 is disposed in the first avoiding groove 102, one end of the positioning element 13 is fixedly connected to the side frame 112, a clamping gap (not shown) is formed between the other end of the positioning element 13 and a groove wall of the first avoiding groove 102, and the bending section 122 is disposed in the clamping gap. In this embodiment, the positioning element 13 and the side frame 112 are integrated or the positioning element 13 is fixedly connected to the side frame 112 by welding, the positioning element 13 is an elastic structure, the shape of the positioning element 13 is, for example, a sheet or a strip, the bending section 122 is prevented from being in the first avoiding groove 102 by the clamping gap, the positioning element 13 limits the bending section 122, and the vehicle-mounted backlight module is prevented from dropping off due to severe vibration when in use, thereby occupying the space of the accommodating cavity 101 and causing a bright edge phenomenon.

Third embodiment

Fig. 5 is a schematic view of a partial enlarged structure of a third embodiment of the present invention, and as shown in fig. 5, the vehicle-mounted backlight module with a structure designed to avoid voids at the FPC bending portion of the present embodiment is substantially the same in structure as the vehicle-mounted backlight module with a structure designed to avoid voids at the FPC bending portion of the first embodiment, and the difference is that the structure of the avoiding groove is different.

Specifically, an adhesive tape 21 is disposed on a side of the bending section 122 close to the first avoiding groove 102, and the adhesive tape 21 adheres the bending section 122 in the first avoiding groove 102. In this embodiment, the adhesive tape 21 is, for example, a double-sided adhesive tape or a single-sided adhesive tape, and the bending section 122 is fixed in the first avoiding groove 102 by the adhesive tape 21, so that the vehicle-mounted backlight module is prevented from falling off due to severe vibration when in use, and occupying the space of the accommodating cavity 101 to cause a bright edge phenomenon.

Fourth embodiment

The vehicle-mounted backlight module with the clearance structure designed at the FPC bending part of the embodiment is substantially the same in structure as the vehicle-mounted backlight module with the clearance structure designed at the FPC bending part of the first embodiment, and the difference is that the clearance groove has different structures.

Specifically, a second avoiding groove (not shown) is disposed on a side wall of the light guide plate 14 opposite to the side frame 112, the second avoiding groove is disposed corresponding to the first avoiding groove 102, and a stacking position of the bending section 122 and the backlight source section 121 is located between the first avoiding groove 102 and the second avoiding groove. In the embodiment, the first avoiding groove 102 and the second avoiding groove provide enough space for the bending section 122, so as to avoid two sides of the vehicle-mounted backlight module caused by insufficient shading space, and reduce the cost.

The utility model also relates to a vehicle-mounted display device which comprises the vehicle-mounted backlight module with the FPC bending part designed with the clearance structure. In the present embodiment, the on-vehicle display device is, for example, a central control display, an on-vehicle drive recorder, an on-vehicle DVD navigation, an on-vehicle console integrated display, an on-vehicle streaming media rearview mirror, a car seat headrest display, or the like, and is assembled with the TFT glass into a module application, 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 a vehicle-mounted backlight module of empty structure is kept away in design of FPC kink, its characterized in that, includes chase (11) and flexible circuit board (12), chase (11) include bottom plate (111) and fixed connection side frame (112) on bottom plate (111), side frame (112) with form holding chamber (101) of holding diaphragm between bottom plate (111), side frame (112) are located the inner wall of holding chamber (101) is equipped with first groove (102) of dodging, bottom plate (111) are equipped with first via hole (103) of dodging groove (102) and corresponding the setting, flexible circuit board (12) are including backlight source section (121), bending segment (122) and extension section (123), backlight source section (121) are fixed on the inner wall of side frame (112), extension section (123) set up outside holding chamber (101), bending segment (122) are folded and are established on backlight source section (121), the stacking position of the bending section (122) and the backlight source section (121) is arranged corresponding to the first avoiding groove (102), one end of the bending section (122) is electrically connected with the backlight source section (121), and the other end of the bending section (122) penetrates through the through hole (103) and is electrically connected with the extending section (123).

2. The vehicle-mounted backlight module with the clearance structure at the FPC bending part according to claim 1, wherein a positioning element (13) is disposed in the first avoiding groove (102), one end of the positioning element (13) is fixedly connected to the side frame (112), a clamping gap is formed between the other end of the positioning element (13) and a groove wall of the first avoiding groove (102), and the bending section (122) is disposed in the clamping gap.

3. The vehicle-mounted backlight module with the clearance structure at the bending position of the FPC as claimed in claim 1, wherein an adhesive tape (21) is disposed on a side of the bending section (122) close to the first avoiding groove (102), and the adhesive tape (21) adheres the bending section (122) to the first avoiding groove (102).

4. The vehicle-mounted backlight module with the FPC bending space design avoiding structure according to claim 1, wherein the vehicle-mounted backlight module with the FPC bending space design avoiding structure comprises a light guide plate (14), the light guide plate (14) is disposed in the accommodating cavity (101), a second avoiding groove is disposed on a side wall of the light guide plate (14) opposite to the side frame (112), the second avoiding groove is disposed corresponding to the first avoiding groove (102), and a stacking position of the bending section (122) and the backlight section (121) is located between the first avoiding groove (102) and the second avoiding groove.

5. The vehicle-mounted backlight module with the clearance structure at the FPC bending position according to any one of claims 1 to 4, wherein the side frame (112) includes a first side plate (1121) and a second side plate (1122), the first side plate (1121) and the second side plate (1122) are vertically disposed, one end of the backlight source section (121) is fixedly connected to the first side plate (1121), the other end of the backlight source section (121) is fixedly connected to the second side plate (1122), and the first clearance groove (102) is disposed on the second side plate (1122).

6. The vehicle-mounted backlight module with the clearance structure at the bending part of the FPC as claimed in claim 5, wherein the backlight source section (121) includes a light source installation portion (1211) and a connection portion (1212), the light source installation portion (1211) is fixedly connected to the first side plate (1121), and the connection portion (1212) is fixedly connected to the second side plate (1122).

7. The vehicle-mounted backlight module with the clearance structure at the FPC bending part as claimed in claim 6, wherein a cut-preventing film is further disposed on the bottom plate (111), one end of the cut-preventing film is connected to the inner surface of the bottom plate (111), the other end of the cut-preventing film passes through the via hole (103) and is connected to the outer surface of the bottom plate (111), and the cut-preventing film is located between the bending section (122) and the hole wall of the via hole (103).

8. The vehicle-mounted backlight module with the clearance structure at the bending part of the FPC as claimed in claim 7, wherein the flexible pad (15) comprises a first adhesive layer, a buffer layer and a second adhesive layer, the buffer layer is disposed between the first adhesive layer and the second adhesive layer, the first adhesive layer is attached to the bending section (122), and the second adhesive layer is attached to the hole wall of the via hole (103).

9. The vehicle-mounted backlight module with the FPC bending part design avoiding structure as claimed in claim 4, wherein the vehicle-mounted backlight module with the FPC bending part design avoiding structure comprises a reflecting film (16) and an optical diaphragm, the reflecting film (16) is arranged on the bottom plate (111), the light guide plate (14) is arranged on the reflecting film (16), and the optical diaphragm is arranged on the light guide plate (14).

10. An on-vehicle display device, characterized by comprising the on-vehicle backlight module with the FPC bending part design clearance structure of any claim 1 to 9.