CN210835520U

CN210835520U - Backlight module and display device

Info

Publication number: CN210835520U
Application number: CN201921850050.3U
Authority: CN
Inventors: 童咏霖
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-23
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to a backlight module. The backlight module comprises a diffusion plate, a backlight source and a back plate, wherein the backlight source and the back plate are arranged on one side of the back surface of the diffusion plate, the back plate comprises a bottom plate and a side plate connected with the bottom plate, a holding cavity is formed between the bottom plate and the side plate, and the backlight source is arranged on the bottom plate; the side plates are arranged outwards in an inclined mode relative to the bottom plate, the inclined planes of the side plates are covered with the reflecting sheets, and light guide ink dots are arranged on the inclined planes of the reflecting sheets at the four corners of the accommodating cavity respectively. Backlight unit can increase front illumination intensity, effectively eliminate the bad phenomenon of backlight unit vignette, make the product bring better experience.

Description

Backlight module and display device

Technical Field

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

Background

The backlight module is one of the important components of the display, and the conventional backlight modules are classified into a side-in type backlight module and a direct type backlight module according to the position of the light source. Compared with the direct type backlight module, the side-in type backlight module has more materials such as aluminum extrusion, a light guide plate and the like, so that the manufacturing cost is higher. And current straight following formula backlight unit, its lamp pearl generally are equidistant or the non-equidistant is close to the board edge arrangement that is shaded, so for the luminous angle of LED lamp pearl is limited, no matter how the design arranges LED lamp pearl, and backlight unit's four corners light is weakest, always the vignetting of different degrees appears.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to overcome prior art not enough, provide a backlight module and display device to solve backlight module's "dark corner" problem.

In order to realize the purpose, the utility model discloses a technical scheme be:

a backlight module comprises a diffusion plate, a backlight source and a back plate, wherein the backlight source and the back plate are arranged on one side of the back surface of the diffusion plate; the side plates are arranged outwards in an inclined mode relative to the bottom plate, the inclined planes of the side plates are covered with the reflecting sheets, and light guide ink dots are arranged on the inclined planes of the reflecting sheets at the four corners of the accommodating cavity respectively.

Four corners of backlight unit's holding cavity apart from the backlight far away, through silk screen printing leaded light printing ink site on the reflector plate inclined plane at four corners of holding cavity, this leaded light printing ink site can absorb the conduction to the light that the backlight sent to make the luminous intensity increase, eliminate backlight unit's "dark angle" phenomenon, thereby make the result of use of product better.

In order to achieve better technical effects, a further technical improvement comprises that the inclined surface of the reflecting sheet contacted with the light guide ink dots is a rough surface. The light guide printing ink dots increase the front illumination intensity of the backlight module.

In order to obtain better technical effect, the further technical improvement further comprises that a PCB is arranged on the upper surface of the bottom plate, and the backlight source is installed on the PCB.

In order to obtain better technical effect, the further technical improvement further comprises that the backlight source comprises a plurality of LED lamp beads, and the LED lamp beads are respectively installed on the PCB at intervals. The LED lamp beads are arranged at intervals, so that the light emitting range of the backlight source is wider and uniform.

In order to achieve a better technical result, a further technical improvement further comprises that the reflecting surface of the reflecting sheet faces the back surface of the diffusion plate. The reflector plate is used for emitting and correcting light emitted by the backlight source, so that the light can be fully utilized; the diffusion plate is used for diffusing and shielding light.

In order to achieve better technical effects, a further technical improvement comprises that a membrane is covered and attached above the diffusion plate. The membrane can effectively optimize light such as enhancement, diffusion, shielding and the like.

In order to achieve better technical effects, a further technical improvement further comprises the diaphragm, and the diaphragm further comprises a middle frame, wherein one side of the middle frame is connected with the upper surface of the diaphragm, and the other side of the middle frame is connected with the outer side surface of the side plate. The middle frame is used for assisting in fixing the membrane.

In order to obtain better technical effect, the further technical improvement also comprises that a buffer foam layer is arranged between the middle frame and the membrane. Through the cotton layer of buffering bubble can prevent effectively that the diaphragm from popping out, adjusting diaphragm and center clearance and protection diaphragm.

Additionally, the utility model provides a display device, including foretell backlight unit.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

fig. 2 is a partial schematic view of a backlight module according to an embodiment of the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible implementations and advantages of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Please refer to fig. 1 and fig. 2, wherein fig. 1 is a schematic structural diagram of a backlight module provided in this embodiment; fig. 2 is a partial schematic view of the backlight module provided in the present embodiment.

The embodiment provides a backlight module, which includes a diffusion plate 10, and a backlight source 20 and a back plate 30 disposed on one side of the back surface of the diffusion plate 10, where the back plate 30 includes a bottom plate 31 and a side plate 32 connected to the bottom plate 31, an accommodating cavity a is formed between the bottom plate 31 and the side plate 32, and the backlight source 20 is mounted on the bottom plate 31; the side plates 32 are arranged obliquely and outwards relative to the bottom plate 31, the inclined surfaces of the side plates 32 are covered with the reflecting sheets 40, and the inclined surfaces of the reflecting sheets 40 at the four corners of the accommodating cavity A are respectively provided with light guide ink dots 50. In this embodiment, the light guide ink dots 50 are formed by mixing and uniformly stirring the initial light guide ink and the white ink, and are disposed on the inclined plane of the reflector 40 in a silk-screen manner, and the light guide ink dots 50 can absorb and conduct light emitted by the backlight source 20, so that the light intensity is increased, and the "dark corner" phenomenon of the backlight module is eliminated.

The reflective surface of the reflective sheet 40 faces the rear surface of the diffusion plate 10. The reflecting sheet 40 is used for emitting and correcting light emitted by the backlight source 20, so that the light can be fully utilized; the diffusion plate 10 is used for diffusing and shielding light.

The upper surface of the bottom plate 32 is provided with a PCB circuit board, and the backlight source 20 is mounted on the PCB circuit board. The backlight source 20 includes a plurality of LED lamp beads, and the LED lamp beads are respectively mounted on the PCB at intervals. Through LED lamp pearl of interval arrangement for backlight 20's luminous scope is more extensive even.

In addition, a membrane 60 is covered and adhered on the diffusion plate 10. The membrane 60 can be used to optimize light enhancement, diffusion, shading, etc. The backlight module of this embodiment further includes a middle frame 70, one side of the middle frame 70 is connected to the upper surface of the membrane 60, and the other side is connected to the outer side of the side plate 32. The middle frame 70 is used to assist in securing the diaphragm 60. Wherein, a buffer foam layer 80 is arranged between the middle frame 70 and the membrane 60. The buffering foam layer 80 can effectively prevent the membrane 60 from popping up, adjust the gap between the membrane 60 and the middle frame 70 and protect the membrane 60.

The display device provided by the embodiment of the invention comprises the backlight module, and the backlight module is the backlight module in the embodiment. The display device may be: liquid crystal panels, OLED panels, liquid crystal televisions, liquid crystal displays, digital photo frames, mobile phones, tablet computers and other products or components with display functions.

Compared with the prior art, four corners of backlight unit's holding cavity apart from the backlight far away, through silk screen printing leaded light printing ink site on the reflector plate inclined plane at four corners of holding cavity, this leaded light printing ink site can absorb the conduction to the light that the backlight sent to make the luminous intensity increase, eliminate backlight unit's "dark angle" phenomenon, thereby make the result of use of product better.

The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the backlight module. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A backlight module comprises a diffusion plate, a backlight source and a back plate, wherein the backlight source and the back plate are arranged on one side of the back surface of the diffusion plate; the method is characterized in that: the side plates are arranged outwards in an inclined mode relative to the bottom plate, the inclined planes of the side plates are covered with the reflecting sheets, and light guide ink dots are arranged on the inclined planes of the reflecting sheets at the four corners of the accommodating cavity respectively.

2. A backlight module according to claim 1, wherein: the inclined plane of the reflector plate contacted with the light guide ink dots is a rough surface.

3. A backlight module according to claim 1, wherein: the upper surface of bottom plate is equipped with the PCB circuit board, the backlight is installed on the PCB circuit board.

4. A backlight module according to claim 3, wherein: the backlight source comprises a plurality of LED lamp beads, and the LED lamp beads are respectively installed on the PCB at intervals.

5. A backlight module according to claim 1, wherein: the reflective surface of the reflective sheet faces the back surface of the diffuser plate.

6. A backlight module according to claim 1, wherein: a diaphragm is covered and attached above the diffusion plate.

7. A backlight module according to claim 6, wherein: the diaphragm is characterized by further comprising a middle frame, wherein one side of the middle frame is connected with the upper surface of the diaphragm, and the other side of the middle frame is connected with the outer side surface of the side plate.

8. A backlight module according to claim 7, wherein: a buffer foam layer is arranged between the middle frame and the diaphragm.

9. A display device, characterized in that: comprising a backlight module as claimed in any one of claims 1 to 8.