CN215067621U

CN215067621U - Backlight module and display device

Info

Publication number: CN215067621U
Application number: CN202023022679.4U
Authority: CN
Inventors: 王翠娥; 陈溪; 蔡修军; 王冬; 穆景飞; 王立冬; 王大威; 石爽; 王彦明
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-12-07
Anticipated expiration: 2030-12-14

Abstract

Disclosed are a backlight module and a display device, the backlight module including: the rubber frame comprises a retaining wall part and a bearing part arranged on the retaining wall part; the light source assembly comprises a power supply structure and a light emitting piece arranged on the power supply structure, wherein one part of the power supply structure is arranged on the bearing part, a gap is reserved between the power supply structure and the retaining wall part, and a first signal wire used for connecting a reference voltage end is arranged on the power supply structure; the first part of the static protection layer is arranged on one side, away from the light-emitting piece, of the power supply structure and is electrically connected with the first signal wire; wherein an orthographic projection of the first portion of the electrostatic protection layer on a plane of the power supply structure has: a first edge and a second edge oppositely arranged in a first direction; the orthographic projection of the gap on the plane of the power supply structure is positioned between the first edge and the second edge; the first direction is a width direction of the void.

Description

Backlight module and display device

Technical Field

The utility model relates to a show technical field, concretely relates to backlight module and display device.

Background

With the rapid development of the display technology field, the full-screen technology rapidly becomes the development trend of the display industry, and the frame of the display device is narrower and narrower. In some narrow-bezel display devices, the design of the metal backplate is eliminated. When the display device performs an ESD (Electro-Static Discharge) test, a light emitting device in the backlight module is easily damaged, thereby causing abnormal display and affecting user experience.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, provide a backlight unit and display device.

The utility model provides a backlight module, include:

the rubber frame comprises a retaining wall part and a bearing part arranged on the retaining wall part;

the light source assembly comprises a power supply structure and a light emitting piece arranged on the power supply structure, wherein one part of the power supply structure is arranged on the bearing part, a gap is reserved between the power supply structure and the retaining wall part, and a first signal wire used for connecting a reference voltage end is arranged on the power supply structure;

the first part of the static protection layer is arranged on one side, away from the light-emitting piece, of the power supply structure and is electrically connected with the first signal wire;

wherein an orthographic projection of the first portion of the electrostatic protection layer on a plane of the power supply structure has: a first edge and a second edge oppositely arranged in a first direction; the orthographic projection of the gap on the plane of the power supply structure is positioned between the first edge and the second edge; the first direction is a width direction of the void.

In some embodiments, the power supply structure comprises:

the power supply layer is electrically connected with the luminous piece and is used for providing a luminous signal for the luminous piece; the first signal line is provided in the power supply layer;

the insulating spacing layer is arranged on one side, far away from the light-emitting piece, of the power supply layer;

the conducting layer is arranged on one side, far away from the power supply layer, of the insulating spacing layer;

the first connecting piece is used for electrically connecting the first signal wire with the conductive layer through a first through hole at least penetrating through the insulating spacing layer;

wherein the first portion of the static shield layer is electrically connected to the conductive layer.

In some embodiments, the static electricity protection layer further comprises a second portion connected to the first portion of the static electricity protection layer, and the second portion of the static electricity protection layer is arranged on one side, away from the light emitting piece, of the rubber frame.

In some embodiments, a reflective sheet is disposed on a side of the bearing part away from the power supply structure;

the static protection layer further comprises a third part connected with the second part of the static protection layer, and the third part of the static protection layer is located on one side, far away from the bearing part, of the reflector plate and is electrically connected with the reflector plate.

In some embodiments, the first portion, the second portion, and the third portion of the electrostatic shield are a unitary structure.

In some embodiments, the material of the static electricity shield layer has a resistivity less than the resistivity of the material of the reflector sheet.

In some embodiments, the material of the static electricity shield layer has a thermal conductivity greater than a thermal conductivity of the material of the reflector sheet.

In some embodiments, the electrostatic protection layer includes a conductive body and an encapsulation layer wrapping the conductive body, the encapsulation layer is a conductor, and the material of the conductive body includes graphite.

In some embodiments, the power supply layer comprises:

a substrate;

a first routing layer disposed on the substrate, wherein the first signal line is located in the first routing layer;

the second wiring layer is arranged on the substrate and is positioned on one side, away from the first wiring layer, of the substrate, and the second wiring layer comprises a transmission line connected with the light-emitting piece;

and the second connecting piece is used for connecting the transmission line with the first signal line through a second through hole at least penetrating through the substrate.

In some embodiments, the second routing layer further includes an electrostatic protection bar spaced apart from the transmission line and connected to a pad for connecting the reference voltage terminal.

In some embodiments, the conductive layer is a mesh structure.

In some embodiments, the first portion of the static shield layer is electrically connected to the conductive layer by a conductive paste.

In some embodiments, further comprising: the light guide plate is arranged around the retaining wall part, the bearing part is arranged on one side of the retaining wall part facing the light guide plate, and the light-emitting part is arranged between the light guide plate and the rubber frame; the power supply structure is connected with the bearing part and the light guide plate.

In some embodiments, further comprising:

the diffusion sheet is arranged on one side of the light guide plate, which is far away from the reflection sheet;

the prism group comprises a first prism sheet and a second prism sheet, the first prism sheet is arranged on one side of the diffusion sheet far away from the light guide plate, and the second prism sheet is arranged on one side of the first prism sheet far away from the light guide plate;

the light shading strip is arranged between the prism lens group and the power supply structure;

and the shading layer is positioned on one side of the light source assembly, which is far away from the reflector plate, and the orthographic projection of the shading layer on the reflector plate covers the orthographic projection of the light source assembly and the orthographic projection of the shading strips on the reflector plate.

In some embodiments, further comprising: and the reflecting sheet protective layer is arranged on one side of the reflecting sheet, which is far away from the light guide plate.

The embodiment of the disclosure further provides a display device, which includes the backlight module.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a partial plan view of a backlight unit provided in a comparative example.

Fig. 2 is a sectional view taken along line a-a' of fig. 1.

Fig. 3 is an exploded view of a backlight module provided in some embodiments of the present disclosure.

Fig. 4 is a cross-sectional view of a backlight module provided in some embodiments of the present disclosure.

Fig. 5 is an expanded plan view of a static-electricity shield layer provided in some embodiments of the present disclosure.

Fig. 6 is a sectional view taken along line B-B' in fig. 5.

Fig. 7 is a schematic view of film layers of a light source assembly provided in some embodiments of the present disclosure.

Fig. 8 is a schematic view of a first routing layer provided in some embodiments of the present disclosure.

Fig. 9 is a schematic view of a second routing layer provided in some embodiments of the present disclosure.

Fig. 10 is a plan view of a conductive layer provided in some embodiments of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

The terminology used herein to describe the embodiments of the disclosure is not intended to limit and/or define the scope of the disclosure. For example, unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. It should be understood that the use of "first," "second," and similar terms in the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The singular forms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

In the description below, when an element or layer is referred to as being "on" or "connected to" another element or layer, it may be directly on, connected to, or intervening elements or layers may be present. However, when an element or layer is referred to as being "directly on" or "directly connected to" another element or layer, there are no intervening elements or layers present. The term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a partial plan view of a backlight module provided in a comparative example, and fig. 2 is a cross-sectional view taken along line a-a' of fig. 1, the backlight module being for providing backlight to a display module. As shown in fig. 2, the backlight module includes: glue frame 40, light source subassembly 30, light guide plate 10, reflector plate 20, light shield layer 50, optics diaphragm group 60, glue frame 40 and encircle light guide plate 10 and set up, light shield layer 50 is corresponding to the peripheral region around the display area of display module assembly. The light source assembly 30 includes a power supply structure 32 and a light emitting member 31 disposed on the power supply structure 32, for example, the light emitting member 31 is an LED lamp. The light emitting member 31 is disposed between the light guide plate 10 and the rubber frame 40. The light guide plate 10 has a light emitting surface and a bottom surface opposite to each other, and a light incident surface connected between the light emitting surface and the bottom surface, and the light incident surface faces the light emitting element 31 to receive the light emitted from the light emitting element 31. The reflective sheet 20 is disposed on a side of the light guide plate 10 away from the light emitting surface thereof. The light-emitting surface of the light guide plate 10 may be provided with a dot structure, and the light emitted from the light-emitting element 31 into the light-incident surface of the light guide plate 10 is totally reflected in the light guide plate 10 and then emitted from the dot structure. When a part of light in the light guide plate 10 leaks from the bottom surface of the light guide plate 10, the light is reflected back into the light guide plate 10 by the light reflection of the reflection sheet 20, thereby improving light transmittance. The material of the reflective sheet 20 may include silver, among others.

The inventor found that the positions a, b and c in fig. 1 are positions with weak antistatic ability, and when performing an ESD test, electrostatic charges enter the area surrounded by the rubber frame 40 along the reflective sheet 20 at the positions a, b and c, or enter the area surrounded by the rubber frame 40 from the gap between the rubber frame 40 and the light shielding layer 50 at the positions a and c, so as to damage the light emitting member 31, or even completely damage the light emitting member 31.

In order to prevent the light emitting element 31 from being damaged during the ESD test, the embodiment of the present disclosure provides a backlight module, which is used in a display device and provides backlight for the display module of the display device. Fig. 3 is an exploded view of a backlight module provided in some embodiments of the present disclosure, fig. 4 is a cross-sectional view of the backlight module provided in some embodiments of the present disclosure, and fig. 4 is a cross-sectional view of the backlight module provided in some embodiments of the present disclosure, taken along a line a-a' of fig. 1, as shown in fig. 3 and 4, the backlight module includes: a glue frame 40, a light source assembly 30 and a static electricity shield 70.

The rubber frame 40 includes a blocking wall portion 41 and a bearing portion 42 provided on the blocking wall portion 41.

The light source assembly 30 includes a power supply structure 32 and a light emitting member 31, and the light emitting member 31 is disposed on the power supply structure 32 and is located at one side of the bearing portion 42. A part of the power supply structure 32 is disposed on the bearing portion 42, and a gap 331 is left between the power supply structure 32 and the retaining wall portion 41, and a first signal line for connecting a reference voltage terminal is disposed on the power supply structure 32. The reference voltage terminal may be a ground terminal. The power supply structure 32 may be a flexible circuit board, and the light emitting member 31 may be an LED lamp.

The electrostatic protection layer 70 is a conductor, and the electrostatic protection layer 70 includes a first portion 701, the first portion 701 is disposed on a side of the power supply structure 32 away from the light emitting element 31, and is electrically connected to the first signal line, so as to be electrically connected to the reference voltage terminal.

Wherein, the orthographic projection of the first portion 701 of the electrostatic protection layer 70 on the plane of the power supply structure 32 has: a first edge and a second edge oppositely arranged in a first direction. The plane of the power supply structure 32 refers to a plane of the surface of the power supply structure 32 facing away from the light emitting member 31. The orthographic projection of the gap 331 on the plane of the supply structure 32 is located between the first edge and the second edge. The first direction is the direction identified in fig. 4, i.e., the width direction of the gap 331. Both the first edge and the second edge extend in a direction perpendicular to the plane of the paper in fig. 4.

In the embodiment of the present disclosure, the backlight module includes the electrostatic protection layer 70, the orthographic projection of the gap 331 on the plane where the power supply structure 32 is located between the first edge and the second edge of the orthographic projection of the first portion 701 of the electrostatic protection layer 70, and the first portion 701 of the electrostatic protection layer 70 is connected to the reference voltage terminal, so that, when performing the ESD test, after the electrostatic charges at the positions a, b, and c in fig. 1 enter the gap between the power supply structure 32 and the retaining wall portion 41, the electrostatic charges are transferred to the first portion 701 of the electrostatic protection layer 70 and further transferred to the reference voltage terminal, thereby achieving the effect of electrostatic discharge to prevent the static electricity in the ESD test from damaging the light emitting device 31.

In some embodiments, as shown in fig. 4, the backlight module further includes a light guide plate 10 and a reflective sheet 20, and a plastic frame 40 is disposed around the light guide plate 10. The light guide plate 10 has a light emitting surface and a bottom surface opposite to each other, and a light incident surface connected between the light emitting surface and the bottom surface, and the light emitting element 31 is disposed between the rubber frame 40 and the light incident surface of the light guide plate 10. The light-emitting surface of the light guide plate 10 may be provided with a dot structure, and light entering the light-entering surface of the light guide plate 10 is totally reflected in the light guide plate 10 and then emitted from the dot structure. The power supply structure 32 is connected to both the carrier part 42 and the light guide plate 10. For example, the power supply structure 32 is connected with the carrier part 42 and the light guide plate 10 through the first adhesive layer 33.

A portion of the reflective sheet 20 is disposed on a side of the carrying portion 42 away from the power supply structure 32, and the reflective sheet 20 may be adhered on a surface of the carrying portion 42 facing the reflective sheet 20 by the second adhesive layer 21. The reflective sheet 20 is stacked on the light guide plate 10, and when a portion of light in the light guide plate 10 leaks from the bottom surface of the light guide plate 10, the light can be reflected back into the light guide plate 10 by the light reflection of the reflective sheet 20, thereby improving the light utilization rate. The material of the reflective sheet 20 may include silver, among others.

In some embodiments, as shown in fig. 4, the static electricity shield 70 further includes a second portion 702 connected to the first portion 701 thereof, and the second portion 702 of the static electricity shield 70 is disposed at a side of the glue frame 40 away from the light emitting member 31. The electrostatic charge on the side of the rubber frame 40 away from the light emitting member 31 can be transmitted to the reference voltage terminal through the second portion 702 of the electrostatic protection layer 70, thereby facilitating the discharge of more electrostatic charge. Wherein the second portion 702 may be bonded to the adhesive frame 40 by an adhesive material.

In some embodiments, the static electricity protection layer 70 further includes a third portion 703 connected to the second portion 702, and the third portion 703 of the static electricity protection layer 70 is located on a side of the reflective sheet 20 away from the carrier portion 42 and is electrically connected to the reflective sheet 20. Since the third portion 703 of the electrostatic protection layer 70 is electrically connected to the reflective sheet 20, when electrostatic charges exist on the reflective sheet 20, the electrostatic charges are transmitted to the reference voltage terminal through the electrostatic protection layer 70, thereby preventing the light emitting member 31 from being damaged.

The first portion 701, the second portion 702 and the third portion 703 of the electrostatic protection layer 70 are an integral structure. For example, the first portion 701, the second portion 702, and the third portion 703 are all a single film layer, and the first portion 701, the second portion 702, and the third portion 703 are formed as one body.

In some embodiments, the resistivity of the material of the static electricity shield layer 70 is less than the resistivity of the material of the reflective sheet 20. Thus, the static electricity at the positions a, b, and c in fig. 1 is first transmitted to the static electricity shield 70, and thus can be directly discharged to the air, or the reference voltage terminal, through the static electricity shield 70.

In some embodiments, the thermal conductivity of the material of the static electricity protection layer 70 is greater than that of the reflective sheet 20, so that the heat generated by the light emitting member 31 can be rapidly dissipated, thereby reducing the risk of the reflective sheet 20 being wrinkled due to heat.

When the electrostatic shield layer 70 includes a plurality of film layers, the thermal conductivity (or resistivity) of the material of the electrostatic shield layer 70 is an average value of the thermal conductivities (or resistivities) of the plurality of film layers of the electrostatic shield layer 70.

Fig. 5 is an expanded plan view of the electrostatic shield provided in some embodiments of the present disclosure, and fig. 6 is a cross-sectional view taken along line B-B' of fig. 5, and as shown in fig. 4 to 6, the electrostatic shield 70 is bonded to the reflective sheet 20 by a first conductive paste 71 and is bonded to the power supply structure 32 by a second conductive paste 72.

The electrostatic shield layer 70 includes: a conductive body 70a and an encapsulation layer 70b encasing the conductive body 70 a. The encapsulation layer 70b is a conductor, and optionally, the encapsulation layer 70b includes a first encapsulation layer 70b1 and a second encapsulation layer 70b2 located at two sides of the conductive body 70a, for example, the first encapsulation layer 70b1 and the second encapsulation layer 70b2 are both single-sided adhesive layers with conductivity, and surfaces thereof facing the conductive body 70a have adhesiveness. The material of the conductive body 70a includes graphite. Since the graphite material has a good heat dissipation performance, the electrostatic protection layer 70 can also dissipate heat generated by the light emitting member 31, thereby reducing the risk of wrinkles generated by the reflector sheet 20 due to heating.

It is noted that the first portion 701, the second portion 702, and the third portion 703 of the electrostatic protection layer 70 may each include a conductive body 70a, a first encapsulation layer 70b1, and a second encapsulation layer 70b 2. The conductive body 70a of the first portion 701, the conductive body 70a of the second portion 702, and the conductive body 70a of the third portion 703 are of a whole layer structure, the first encapsulating layer 70b1 of the first portion 701, the first encapsulating layer 70b1 of the second portion 702, and the first encapsulating layer 70b1 of the third portion 703 are of a whole layer structure, and the second encapsulating layer 70b2 of the first portion 701, the second encapsulating layer 70b2 of the second portion 702, and the second encapsulating layer 70b2 of the third portion 703 are of a whole layer structure.

Fig. 7 is a schematic film layer diagram of a light source module provided in some embodiments of the present disclosure, and as shown in fig. 7, the power supply structure 32 includes: a power supply layer 32a, an insulating spacer layer 325, a conductive layer 326, and a first connection member 324. The power supply layer 32a is electrically connected to the light emitting element 31 and is used for providing a light emitting signal to the light emitting element 31, where the light emitting signal may include, for example, a high level signal provided by a high level voltage terminal and a reference voltage signal provided by a reference voltage terminal. The first signal line 321a is provided in the power supply layer 32 a.

For example, the power supply layer 32a includes a substrate 320, a first wiring layer 321, a second wiring layer 322, and a second connector 323. Fig. 8 is a schematic view of a first routing layer provided in some embodiments of the present disclosure, and fig. 9 is a schematic view of a second routing layer provided in some embodiments of the present disclosure, as shown in fig. 7 and 8, the first routing layer 321 is disposed on the substrate 320, and the first routing layer 321 includes the first signal line 321 a. The substrate 320 includes a main portion 320a and a connection portion 320b, the connection portion 320b is provided with pads 3201, the pads 3201 are used for connecting with an external driving circuit board, for example, at least one pad 3201 is connected with a reference voltage terminal. One end of the first signal line 321a may be connected to a reference voltage terminal through a pad 3201, and the other end may be connected to the light emitting element 31. Wherein the first signal line 321a may be indirectly connected with the light emitting member 31. For example, the light emitting element 31 and the second wiring layer 322 are disposed on a side of the substrate 320 away from the first wiring layer 321, as shown in fig. 7 and 9, the second wiring layer 322 includes a transmission line 322a connected to the light emitting element 31, the first signal line 321a is connected to the transmission line 322a in the second wiring layer 322 through a second connector 323, and the light emitting element 31 is connected to the transmission line 322 a. The second connector 323 connects the first signal line 321a with the transmission line 322a through a second via, which penetrates at least the substrate 320.

Illustratively, the transmission line 322a and the first signal line 321a are made of copper foil, the material of the second connector 323 includes copper, and the second connector 323 may be made by an electroplating process. For example, after the first wiring layer 321 and the second wiring layer 322 are formed on the substrate 320, a second via hole penetrating the first signal line 321a, the substrate 320, and the transmission line 322a is formed, and a second connector 323 is formed through an electroplating process, at least a portion of the second connector 323 being positioned in the second via hole, thereby connecting the first signal line 321a with the transmission line 322 a.

In addition, the second routing layer 322 may further include an electrostatic protection bar 322b, the electrostatic protection bar 322b is spaced apart from the transmission line 322a, the electrostatic protection bar 322b is connected to a pad 3202, and the pad 3202 is used for connecting a reference voltage terminal, such as a ground terminal. The electrostatic protection bar 322b may conduct the electrostatic charge to the reference voltage terminal. Wherein at least a portion of the boundary of the static bar 322b may be flush with the boundary of the body portion 320a of the substrate 320.

The insulating spacer layer 325 is disposed on a side of the power supply layer 32a away from the light emitting member 31. In some embodiments, the insulating spacer layer 325 includes: a first insulating layer 3251 and a second insulating layer 3252, the material of the first insulating layer 3251 includes, for example, an adhesive material, and the thickness thereof is between 12 μm and 17 μm, for example, 15 μm; the second insulating layer 3252 is located on a side of the first insulating layer 3251 away from the substrate 320, and a material of the second insulating layer 3252 includes, for example, Polyimide (PI), and a thickness of the second insulating layer is between 10 μm and 15 μm, for example, 12.5 μm.

The conductive layer 326 is disposed on the side of the insulative spacer layer 325 away from the power supply layer 32a, and the conductive layer 326 may be a copper foil layer. The thickness of the conductive layer 326 is between 10 μm and 15 μm. The electrostatic protection layer 70 in fig. 4 is adhered to the conductive layer 326 by the second conductive adhesive 72 and electrically connected.

The first connector 324 electrically connects the first signal line 321a and the conductive layer 326 through a first via penetrating at least the insulative spacer layer 325. The material of the first connection member 324 includes copper, and the first connection member 324 may be formed using an electroplating process. For example, after the insulative spacer layer 325 and the conductive layer 326 are formed on the substrate 320, a first via penetrating at least through the insulative spacer layer 325 and the conductive layer 326 is formed, and then the first connection member 324 is formed through an electroplating process, at least a portion of the first connection member 324 is positioned in the first via, thereby electrically connecting the first signal line 321a with the conductive layer 326.

A third insulating layer 327 and a fourth insulating layer 328 are further disposed on a side of the second routing layer 322 away from the substrate 320, and the third insulating layer 327 is located between the second routing layer 322 and the fourth insulating layer 328. The third insulating layer 327 is made of, for example, an adhesive material, and the material of the fourth insulating layer 328 includes, for example, polyimide. The light emitting element 31 is located on a side of the third insulating layer 327 away from the substrate 320, and an electrode of the light emitting element 31 is connected to the transmission line 322a in the second wiring layer 322 through a via hole on the third insulating layer 327. The third insulating layer 327 and the fourth insulating layer 328 may expose the electrostatic protection bar 322b, so as to ensure that the electrostatic protection bar 322b can perform an electrostatic shielding function.

Fig. 10 is a plan view of a conductive layer provided in some embodiments of the present disclosure, and as shown in fig. 10, the conductive layer 326 is a grid structure so as to facilitate bending of the power supply structure 32 as a whole. In some examples, the first connectors 324 are disposed along both ends of the length of the power supply structure 32 (e.g., at positions P1 and P2 in fig. 10).

As shown in fig. 4, the backlight module further includes: a diffusion sheet 63, a prism group, a light shielding strip 64, and a light shielding layer 50.

The diffusion sheet 63 is disposed on a side of the light guide plate 10 away from the reflection sheet 20, and the diffusion sheet 63 diffuses light emitted from the light guide plate 10.

The prism group includes a first prism sheet 61 and a second prism sheet 62, the first prism sheet 61 is disposed on a side of the diffusion sheet 63 away from the light guide plate 10, and the second prism sheet 62 is disposed on a side of the first prism sheet 61 away from the light guide plate 10. The first prism sheet 61 and the second prism sheet 62 are used for concentrating the relatively dispersed light emitted from the diffusion sheet 63 into a certain angle range for emission, so as to improve the light emission brightness in the range, and further improve the front brightness of the display device. The extending directions of the ribs of the first prism sheet 61 and the ribs of the second prism sheet 62 may intersect.

The light shielding strip 64 is disposed between the prism group and the power supply structure 32, so as to prevent the light of the light emitting element 31 from directly emitting to the display area of the display module along the interval between the ribs of the first prism sheet 61 and the second prism sheet 62. The diffusion plate 63 may extend beyond the prism group on a side thereof adjacent to the light emitting assembly 30, and the light blocking strip 64 may be of an adhesive light blocking structure and is bonded to the diffusion plate 63.

The light shielding layer 50 is located on a side of the light source assembly 30 away from the reflector plate 20, and an orthographic projection of the light shielding layer 30 on the reflector plate 20 covers an orthographic projection of the light source assembly 30 and the light shielding bars 64 on the reflector plate 20. For example, the display module includes a display area and a peripheral area surrounding the display area, and the orthographic projection of the light shielding layer 50 on the display module is located in the peripheral area. For example, the light-shielding layer 50 may have an adhesive film layer so as to be adhered to the light-shielding bar 64, the bezel 40, and the electrostatic protection layer 70.

As shown in fig. 3, the backlight module further includes a reflective sheet protection layer 90 disposed on a side of the reflective sheet 20 away from the light guide plate 10 for protecting the reflective sheet 10. Wherein the reflective sheet protective layer 90 may be adhered to the reflective sheet 20 by an adhesive material. The reflective sheet protective layer 90 may be in contact with the static electricity protective layer 70, or may be disposed at a distance from the third portion 703 of the static electricity protective layer 70.

The assembling process of the backlight module will be described.

Placing the rubber frame 40 on a machine table, and attaching the reflector plate 20 to the rubber frame 40 by using a film sticking machine; then, one end of the static electricity shield layer 70 is bonded to the reflective sheet 20 through a conductive adhesive; then, the power supply structure 32 of the light source assembly 30 is bonded to the light guide plate 10, then, the light guide plate 10 is placed in the area surrounded by the glue frame 40, and the power supply structure 32 of the light source assembly 30 is bonded to the glue frame 40, so that the light source assembly 30, the light guide plate 10 and the glue frame 40 are assembled together; then, bending the electrostatic protection layer 70 to make one end of the electrostatic protection layer away from the reflector 20 attached to the surface of the power supply structure 32 away from the light emitting element 31; then, the diffusion sheet 63, the first prism sheet 61, and the second prism sheet 62 are fixed on the light exit side of the light guide plate 10; then, assembling and pressing the light shielding layer 50 to obtain the structure shown in fig. 4; finally, the backlight module is subjected to vacuum adsorption inspection (for inspecting defects of foreign matters, etc.), appearance inspection, optical inspection, etc.

The embodiment of the disclosure further provides a display device, which includes a display module and the backlight module, wherein the display module is a liquid crystal display module and has a display area and a peripheral area surrounding the display area. The display module is arranged on the light-emitting side of the backlight module. In the backlight module, the shading layer corresponds to the peripheral area of the display module.

The display device can be any product or component with a display function, such as electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A backlight module, comprising:

2. A backlight module according to claim 1, wherein the power supply structure comprises:

3. The backlight module as claimed in claim 1, wherein the electrostatic protection layer further comprises a second portion connected to the first portion, and the second portion of the electrostatic protection layer is disposed on a side of the frame away from the light emitting member.

4. The backlight module according to claim 3, wherein a reflective sheet is disposed on a side of the supporting portion away from the power supply structure;

5. The backlight module as claimed in claim 4, wherein the first, second and third portions of the electrostatic protection layer are of a unitary structure.

6. The backlight module as claimed in claim 4, wherein the electrostatic protection layer is made of a material having a resistivity lower than that of the reflective sheet.

7. The backlight module as claimed in claim 4, wherein the material of the electrostatic protection layer has a thermal conductivity greater than that of the material of the reflective sheet.

8. The backlight module according to claim 7, wherein the electrostatic protection layer comprises a conductive body and an encapsulation layer covering the conductive body, the encapsulation layer is a conductor, and the material of the conductive body comprises graphite.

9. A backlight module according to claim 2, wherein the power supply layer comprises:

a substrate;

10. The backlight module according to claim 9, wherein the second wiring layer further comprises an electrostatic protection bar, the electrostatic protection bar is spaced apart from the transmission line and connected to a pad for connecting the reference voltage terminal.

11. The backlight module as claimed in claim 2, wherein the conductive layer is a mesh structure.

12. The backlight module as claimed in claim 2, wherein the first portion of the electrostatic protection layer is electrically connected to the conductive layer through a conductive paste.

13. The backlight module according to any one of claims 4-8, further comprising: the light guide plate is arranged around the retaining wall part, the bearing part is arranged on one side of the retaining wall part facing the light guide plate, and the light-emitting part is arranged between the light guide plate and the rubber frame; the power supply structure is connected with the bearing part and the light guide plate.

14. A backlight module according to claim 13, further comprising:

15. A backlight module according to claim 13, further comprising: and the reflecting sheet protective layer is arranged on one side of the reflecting sheet, which is far away from the light guide plate.

16. A display device comprising the backlight module of any one of claims 1 to 15.